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What's New in Python 3.3.0 Alpha 2?
===================================

*Release date: XXXX-XX-XX*

Core and Builtins
-----------------

Library
-------

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- Issue #12328: Fix multiprocessing's use of overlapped I/O on Windows.
  Also, add a multiprocessing.connection.wait(rlist, timeout=None) function
  for polling multiple objects at once.  Patch by sbt.

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- Issue #13719: Make the distutils and packaging upload commands aware of
  bdist_msi products.
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- Issue #14007: Accept incomplete TreeBuilder objects (missing start, end,
  data or close method) for the Python implementation as well.
  Drop the no-op TreeBuilder().xml() method from the C implementation.

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What's New in Python 3.3.0 Alpha 1?
===================================
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*Release date: 05-Mar-2012*
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Core and Builtins
-----------------

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- Issue #14172: Fix reference leak when marshalling a buffer-like object
  (other than a bytes object).

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- Issue #13521: dict.setdefault() now does only one lookup for the given key,
  making it "atomic" for many purposes.  Patch by Filip Gruszczyński.

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- PEP 409, Issue #6210: "raise X from None" is now supported as a means of
  suppressing the display of the chained exception context. The chained
  context still remains available as the __context__ attribute.

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- Issue #10181: New memoryview implementation fixes multiple ownership
  and lifetime issues of dynamically allocated Py_buffer members (#9990)
  as well as crashes (#8305, #7433). Many new features have been added
  (See whatsnew/3.3), and the documentation has been updated extensively.
  The ndarray test object from _testbuffer.c implements all aspects of
  PEP-3118, so further development towards the complete implementation
  of the PEP can proceed in a test-driven manner.

  Thanks to Nick Coghlan, Antoine Pitrou and Pauli Virtanen for review
  and many ideas.

- Issue #12834: Fix incorrect results of memoryview.tobytes() for
  non-contiguous arrays.

- Issue #5231: Introduce memoryview.cast() method that allows changing
  format and shape without making a copy of the underlying memory.

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- Issue #14084: Fix a file descriptor leak when importing a module with a
  bad encoding.

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- Upgrade Unicode data to Unicode 6.1.

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- Issue #14040: Remove rarely used file name suffixes for C extensions
  (under POSIX mainly).

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- Issue #14051: Allow arbitrary attributes to be set of classmethod and
  staticmethod.

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- Issue #13703: oCERT-2011-003: Randomize hashes of str and bytes to protect
  against denial of service attacks due to hash collisions within the dict and
  set types.  Patch by David Malcolm, based on work by Victor Stinner.
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- Issue #13020: Fix a reference leak when allocating a structsequence object
  fails.  Patch by Suman Saha.

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- Issue #13908: Ready types returned from PyType_FromSpec.

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- Issue #11235: Fix OverflowError when trying to import a source file whose
  modification time doesn't fit in a 32-bit timestamp.

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- Issue #12705: A SyntaxError exception is now raised when attempting to
  compile multiple statements as a single interactive statement.

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- Fix the builtin module initialization code to store the init function for
  future reinitialization.

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- Issue #8052: The posix subprocess module would take a long time closing
  all possible file descriptors in the child process rather than just open
  file descriptors.  It now closes only the open fds if possible for the
  default close_fds=True behavior.

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- Issue #13629: Renumber the tokens in token.h so that they match the indexes
  into _PyParser_TokenNames.

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- Issue #13752: Add a casefold() method to str.

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- Issue #13761: Add a "flush" keyword argument to the print() function,
  used to ensure flushing the output stream.

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- Issue #13645: pyc files now contain the size of the corresponding source
  code, to avoid timestamp collisions (especially on filesystems with a low
  timestamp resolution) when checking for freshness of the bytecode.

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- PEP 380, Issue #11682: Add "yield from <x>" to support easy delegation to
  subgenerators (initial patch by Greg Ewing, integration into 3.3 by
  Renaud Blanch, Ryan Kelly, Zbigniew Jędrzejewski-Szmek and Nick Coghlan)

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- Issue #13748: Raw bytes literals can now be written with the ``rb`` prefix
  as well as ``br``.

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- Issue #12736: Use full unicode case mappings for upper, lower, and title case.

118 119
- Issue #12760: Add a create mode to open(). Patch by David Townshend.

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- Issue #13738: Simplify implementation of bytes.lower() and bytes.upper().

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- Issue #13577: Built-in methods and functions now have a __qualname__.
  Patch by sbt.

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- Issue #6695: Full garbage collection runs now clear the freelist of set
  objects.  Initial patch by Matthias Troffaes.

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- Fix OSError.__init__ and OSError.__new__ so that each of them can be
  overriden and take additional arguments (followup to issue #12555).

131 132 133 134
- Fix the fix for issue #12149: it was incorrect, although it had the side
  effect of appearing to resolve the issue.  Thanks to Mark Shannon for
  noticing.

135 136 137
- Issue #13505: Pickle bytes objects in a way that is compatible with
  Python 2 when using protocols <= 2.

138 139 140
- Issue #11147: Fix an unused argument in _Py_ANNOTATE_MEMORY_ORDER.  (Fix
  given by Campbell Barton).

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- Issue #13503: Use a more efficient reduction format for bytearrays with
  pickle protocol >= 3.  The old reduction format is kept with older protocols
  in order to allow unpickling under Python 2.  Patch by Irmen de Jong.

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- Issue #7111: Python can now be run without a stdin, stdout or stderr
  stream.  It was already the case with Python 2.  However, the corresponding
  sys module entries are now set to None (instead of an unusable file object).

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- Issue #11849: Ensure that free()d memory arenas are really released
  on POSIX systems supporting anonymous memory mappings.  Patch by
  Charles-François Natali.

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- Issue #13452: PyUnicode_EncodeDecimal() doesn't support error handlers
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  different than "strict" anymore. The caller was unable to compute the
  size of the output buffer: it depends on the error handler.

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- PEP 3155 / issue #13448: Qualified name for classes and functions.

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- Issue #13436: Fix a bogus error message when an AST object was passed
  an invalid integer value.

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- Issue #13411: memoryview objects are now hashable when the underlying
  object is hashable.

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- Issue #13338: Handle all enumerations in _Py_ANNOTATE_MEMORY_ORDER
  to allow compiling extension modules with -Wswitch-enum on gcc.
  Initial patch by Floris Bruynooghe.

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- Issue #10227: Add an allocation cache for a single slice object.  Patch by
  Stefan Behnel.

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- Issue #13393: BufferedReader.read1() now asks the full requested size to
  the raw stream instead of limiting itself to the buffer size.

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- Issue #13392: Writing a pyc file should now be atomic under Windows as well.

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- Issue #13333: The UTF-7 decoder now accepts lone surrogates (the encoder
  already accepts them).

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- Issue #13389: Full garbage collection passes now clear the freelists for
  list and dict objects.  They already cleared other freelists in the
  interpreter.

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- Issue #13327: Remove the need for an explicit None as the second argument
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  to os.utime, os.lutimes, os.futimes, os.futimens, os.futimesat, in
  order to update to the current time. Also added keyword argument
  handling to os.utimensat in order to remove the need for explicit None.
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- Issue #13350: Simplify some C code by replacing most usages of
  PyUnicode_Format by PyUnicode_FromFormat.

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- Issue #13342: input() used to ignore sys.stdin's and sys.stdout's unicode
  error handler in interactive mode (when calling into PyOS_Readline()).

195 196
- Issue #9896: Add start, stop, and step attributes to range objects.

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- Issue #13343: Fix a SystemError when a lambda expression uses a global
  variable in the default value of a keyword-only argument:
  (lambda *, arg=GLOBAL_NAME: None)

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- Issue #12797: Added custom opener parameter to builtin open() and
  FileIO.open().

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- Issue #10519: Avoid unnecessary recursive function calls in
  setobject.c.

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- Issue #10363: Deallocate global locks in Py_Finalize().

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- Issue #13018: Fix reference leaks in error paths in dictobject.c.
  Patch by Suman Saha.

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- Issue #13201: Define '==' and '!=' to compare range objects based on
  the sequence of values they define (instead of comparing based on
  object identity).

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- Issue #1294232: In a few cases involving metaclass inheritance, the
  interpreter would sometimes invoke the wrong metaclass when building a new
  class object. These cases now behave correctly. Patch by Daniel Urban.

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- Issue #12753: Add support for Unicode name aliases and named sequences.
  Both :func:`unicodedata.lookup()` and '\N{...}' now resolve aliases,
  and :func:`unicodedata.lookup()` resolves named sequences too.

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- Issue #12170: The count(), find(), rfind(), index() and rindex() methods
  of bytes and bytearray objects now accept an integer between 0 and 255
  as their first argument.  Patch by Petri Lehtinen.

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- Issue #12604: VTRACE macro expanded to no-op in _sre.c to avoid compiler
  warnings. Patch by Josh Triplett and Petri Lehtinen.

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- Issue #12281: Rewrite the MBCS codec to handle correctly replace and ignore
  error handlers on all Windows versions. The MBCS codec is now supporting all
  error handlers, instead of only replace to encode and ignore to decode.

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- Issue #13188: When called without an explicit traceback argument,
  generator.throw() now gets the traceback from the passed exception's
  ``__traceback__`` attribute.  Patch by Petri Lehtinen.

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- Issue #13146: Writing a pyc file is now atomic under POSIX.

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- Issue #7833: Extension modules built using distutils on Windows will no
  longer include a "manifest" to prevent them failing at import time in some
  embedded situations.

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- PEP 3151 / issue #12555: reworking the OS and IO exception hierarchy.

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- Add internal API for static strings (_Py_identifier et al.).
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- Issue #13063: the Windows error ERROR_NO_DATA (numbered 232 and described
  as "The pipe is being closed") is now mapped to POSIX errno EPIPE
  (previously EINVAL).

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- Issue #12911: Fix memory consumption when calculating the repr() of huge
  tuples or lists.

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- PEP 393: flexible string representation. Thanks to Torsten Becker for the
  initial implementation, and Victor Stinner for various bug fixes.
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- Issue #14081: The 'sep' and 'maxsplit' parameter to str.split, bytes.split,
  and bytearray.split may now be passed as keyword arguments.

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- Issue #13012: The 'keepends' parameter to str.splitlines may now be passed
  as a keyword argument:  "my_string.splitlines(keepends=True)".  The same
  change also applies to bytes.splitlines and bytearray.splitlines.

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- Issue #7732: Don't open a directory as a file anymore while importing a
  module. Ignore the direcotry if its name matchs the module name (e.g.
  "__init__.py") and raise a ImportError instead.

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- Issue #13021: Missing decref on an error path.  Thanks to Suman Saha for
  finding the bug and providing a patch.

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- Issue #12973: Fix overflow checks that relied on undefined behaviour in
  list_repeat (listobject.c) and islice_next (itertoolsmodule.c).  These bugs
  caused test failures with recent versions of Clang.
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- Issue #12904: os.utime, os.futimes, os.lutimes, and os.futimesat now write
  atime and mtime with nanosecond precision on modern POSIX platforms.

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- Issue #12802: the Windows error ERROR_DIRECTORY (numbered 267) is now
  mapped to POSIX errno ENOTDIR (previously EINVAL).

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- Issue #9200: The str.is* methods now work with strings that contain non-BMP
  characters even in narrow Unicode builds.

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- Issue #12791: Break reference cycles early when a generator exits with
  an exception.

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- Issue #12773: Make __doc__ mutable on user-defined classes.

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- Issue #12766: Raise a ValueError when creating a class with a class variable
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  that conflicts with a name in __slots__.

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- Issue #12266: Fix str.capitalize() to correctly uppercase/lowercase
  titlecased and cased non-letter characters.

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- Issue #12732: In narrow unicode builds, allow Unicode identifiers which fall
  outside the BMP.

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- Issue #12575: Validate user-generated AST before it is compiled.

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- Make type(None), type(Ellipsis), and type(NotImplemented) callable. They
  return the respective singleton instances.
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- Forbid summing bytes with sum().
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- Verify the types of AST strings and identifiers provided by the user before
  compiling them.

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- Issue #12647: The None object now has a __bool__() method that returns False.
  Formerly, bool(None) returned False only because of special case logic
  in PyObject_IsTrue().

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- Issue #12579: str.format_map() now raises a ValueError if used on a
  format string that contains positional fields. Initial patch by
  Julian Berman.

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- Issue #10271: Allow warnings.showwarning() be any callable.

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- Issue #11627: Fix segfault when __new__ on a exception returns a
  non-exception class.
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- Issue #12149: Update the method cache after a type's dictionary gets
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  cleared by the garbage collector.  This fixes a segfault when an instance
  and its type get caught in a reference cycle, and the instance's
  deallocator calls one of the methods on the type (e.g. when subclassing
  IOBase).  Diagnosis and patch by Davide Rizzo.

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- Issue #9611, #9015: FileIO.read() clamps the length to INT_MAX on Windows.

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- Issue #9642: Uniformize the tests on the availability of the mbcs codec, add
  a new HAVE_MBCS define.

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- Issue #9642: Fix filesystem encoding initialization: use the ANSI code page
  on Windows if the mbcs codec is not available, and fail with a fatal error if
  we cannot get the locale encoding (if nl_langinfo(CODESET) is not available)
  instead of using UTF-8.

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- When a generator yields, do not retain the caller's exception state on the
  generator.

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- Issue #12475: Prevent generators from leaking their exception state into the
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  caller's frame as they return for the last time.
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- Issue #12291: You can now load multiple marshalled objects from a stream,
  with other data interleaved between marshalled objects.

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- Issue #12356: When required positional or keyword-only arguments are not
  given, produce a informative error message which includes the name(s) of the
  missing arguments.

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- Issue #12370: Fix super with no arguments when __class__ is overriden in the
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  class body.

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- Issue #12084: os.stat on Windows now works properly with relative symbolic
  links when called from any directory.

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- Loosen type restrictions on the __dir__ method. __dir__ can now return any
  sequence, which will be converted to a list and sorted by dir().

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- Issue #12265: Make error messages produced by passing an invalid set of
  arguments to a function more informative.

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- Issue #12225: Still allow Python to build if Python is not in its hg repo or
  mercurial is not installed.

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- Issue #1195: my_fgets() now always clears errors before calling fgets(). Fix
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  the following case: sys.stdin.read() stopped with CTRL+d (end of file),
  raw_input() interrupted by CTRL+c.

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- Issue #12216: Allow unexpected EOF errors to happen on any line of the file.

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- Issue #12199: The TryExcept and TryFinally and AST nodes have been unified
  into a Try node.

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- Issue #9670: Increase the default stack size for secondary threads on
  Mac OS X and FreeBSD to reduce the chances of a crash instead of a
  "maximum recursion depth" RuntimeError exception.
  (patch by Ronald Oussoren)

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- Issue #12106: The use of the multiple-with shorthand syntax is now reflected
  in the AST.

384 385 386
- Issue #12190: Try to use the same filename object when compiling unmarshalling
  a code objects in the same file.

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- Issue #12166: Move implementations of dir() specialized for various types into
  the __dir__() methods of those types.

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- Issue #5715: In socketserver, close the server socket in the child process.
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- Correct lookup of __dir__ on objects. Among other things, this causes errors
  besides AttributeError found on lookup to be propagated.

395 396 397
- Issue #12060: Use sig_atomic_t type and volatile keyword in the signal
  module. Patch written by Charles-François Natali.

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- Issue #1746656: Added the if_nameindex, if_indextoname, if_nametoindex
  methods to the socket module.
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- Issue #12044: Fixed subprocess.Popen when used as a context manager to
  wait for the process to end when exiting the context to avoid unintentionally
  leaving zombie processes around.

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- Issue #1195: Fix input() if it is interrupted by CTRL+d and then CTRL+c,
  clear the end-of-file indicator after CTRL+d.

408 409 410 411
- Issue #1856: Avoid crashes and lockups when daemon threads run while the
  interpreter is shutting down; instead, these threads are now killed when
  they try to take the GIL.

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- Issue #9756: When calling a method descriptor or a slot wrapper descriptor,
  the check of the object type doesn't read the __class__ attribute anymore.
  Fix a crash if a class override its __class__ attribute (e.g. a proxy of the
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  str type). Patch written by Andreas Stührk.
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- Issue #10517: After fork(), reinitialize the TLS used by the PyGILState_*
  APIs, to avoid a crash with the pthread implementation in RHEL 5.  Patch
  by Charles-François Natali.

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- Issue #10914: Initialize correctly the filesystem codec when creating a new
  subinterpreter to fix a bootstrap issue with codecs implemented in Python, as
  the ISO-8859-15 codec.

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- Issue #11918: OS/2 and VMS are no more supported because of the lack of
  maintainer.

428 429 430
- Issue #6780: fix starts/endswith error message to mention that tuples are
  accepted too.

431 432 433 434
- Issue #5057: fix a bug in the peepholer that led to non-portable pyc files
  between narrow and wide builds while optimizing BINARY_SUBSCR on non-BMP
  chars (e.g. "\U00012345"[0]).

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- Issue #11845: Fix typo in rangeobject.c that caused a crash in
  compute_slice_indices.  Patch by Daniel Urban.

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- Issue #5673: Added a `timeout` keyword argument to subprocess.Popen.wait,
  subprocess.Popen.communicated, subprocess.call, subprocess.check_call, and
  subprocess.check_output.  If the blocking operation takes more than `timeout`
  seconds, the `subprocess.TimeoutExpired` exception is raised.

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- Issue #11650: PyOS_StdioReadline() retries fgets() if it was interrupted
  (EINTR), for example if the program is stopped with CTRL+z on Mac OS X. Patch
  written by Charles-Francois Natali.

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- Issue #9319: Include the filename in "Non-UTF8 code ..." syntax error.

449 450
- Issue #10785: Store the filename as Unicode in the Python parser.

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- Issue #11619: _PyImport_LoadDynamicModule() doesn't encode the path to bytes
  on Windows.

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- Issue #10998: Remove mentions of -Q, sys.flags.division_warning and
  Py_DivisionWarningFlag left over from Python 2.

457 458 459
- Issue #11244: Remove an unnecessary peepholer check that was preventing
  negative zeros from being constant-folded properly.

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- Issue #11395: io.FileIO().write() clamps the data length to 32,767 bytes on
  Windows if the file is a TTY to workaround a Windows bug. The Windows console
  returns an error (12: not enough space error) on writing into stdout if
  stdout mode is binary and the length is greater than 66,000 bytes (or less,
  depending on heap usage).

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- Issue #11320: fix bogus memory management in Modules/getpath.c, leading to
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  a possible crash when calling Py_SetPath().

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- Issue #11432: A bug was introduced in subprocess.Popen on posix systems with
  3.2.0 where the stdout or stderr file descriptor being the same as the stdin
  file descriptor would raise an exception. webbrowser.open would fail. fixed.

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- Issue #9856: Change object.__format__ with a non-empty format string
  to be a DeprecationWarning. In 3.2 it was a PendingDeprecationWarning.
  In 3.4 it will be a TypeError.

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- Issue #11244: The peephole optimizer is now able to constant-fold
  arbitrarily complex expressions.  This also fixes a 3.2 regression where
  operations involving negative numbers were not constant-folded.

481 482 483
- Issue #11450: Don't truncate hg version info in Py_GetBuildInfo() when
  there are many tags (e.g. when using mq).  Patch by Nadeem Vawda.

484 485 486
- Issue #11335: Fixed a memory leak in list.sort when the key function
  throws an exception.

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- Issue #8923: When a string is encoded to UTF-8 in strict mode, the result is
  cached into the object. Examples: str.encode(), str.encode('utf-8'),
  PyUnicode_AsUTF8String() and PyUnicode_AsEncodedString(unicode, "utf-8",
  NULL).

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- Issue #10831: PyUnicode_FromFormat() supports %li, %lli and %zi formats.

494 495 496
- Issue #10829: Refactor PyUnicode_FromFormat(), use the same function to parse
  the format string in the 3 steps, fix crashs on invalid format strings.

497 498
- Issue #13007: whichdb should recognize gdbm 1.9 magic numbers.

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- Issue #11246: Fix PyUnicode_FromFormat("%V") to decode the byte string from
  UTF-8 (with replace error handler) instead of ISO-8859-1 (in strict mode).
  Patch written by Ray Allen.

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- Issue #11286: Raise a ValueError from calling PyMemoryView_FromBuffer with
  a buffer struct having a NULL data pointer.

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- Issue #11272: On Windows, input() strips '\r' (and not only '\n'), and
  sys.stdin uses universal newline (replace '\r\n' by '\n').

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- issue #11828: startswith and endswith don't accept None as slice index.
  Patch by Torsten Becker.

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- Issue #10830: Fix PyUnicode_FromFormatV("%c") for non-BMP characters on
  narrow build.

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- Issue #11168: Remove filename debug variable from PyEval_EvalFrameEx().
  It encoded the Unicode filename to UTF-8, but the encoding fails on
  undecodable filename (on surrogate characters) which raises an unexpected
  UnicodeEncodeError on recursion limit.
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- Issue #11187: Remove bootstrap code (use ASCII) of
  PyUnicode_AsEncodedString(), it was replaced by a better fallback (use the
  locale encoding) in PyUnicode_EncodeFSDefault().

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- Check for NULL result in PyType_FromSpec.

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- Issue #10516: New copy() and clear() methods for lists and bytearrays.
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- Issue #11386: bytearray.pop() now throws IndexError when the bytearray is
  empty, instead of OverflowError.

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- Issue #12380: The rjust, ljust and center methods of bytes and bytearray
  now accept a bytearray argument.

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Library
-------
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- Issue #14168: Check for presence of _attrs before accessing it.

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- Issue #14195: An issue that caused weakref.WeakSet instances to incorrectly
  return True for a WeakSet instance 'a' in both 'a < a' and 'a > a' has been
  fixed.

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- Issue #14166: Pickler objects now have an optional ``dispatch_table``
  attribute which allows to set custom per-pickler reduction functions.
  Patch by sbt.

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- Issue #14177: marshal.loads() now raises TypeError when given an unicode
  string.  Patch by Guilherme Gonçalves.

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- Issue #13550: Remove the debug machinery from the threading module: remove
  verbose arguments from all threading classes and functions.

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- Issue #14159: Fix the len() of weak containers (WeakSet, WeakKeyDictionary,
  WeakValueDictionary) to return a better approximation when some objects
  are dead or dying.  Moreover, the implementation is now O(1) rather than
  O(n).

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- Issue #13125: Silence spurious test_lib2to3 output when in non-verbose mode.
  Patch by Mikhail Novikov.

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- Issue #11841: Fix comparison bug with 'rc' versions in packaging.version.
  Patch by Filip Gruszczyński.

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- Issue #13447: Add a test file to host regression tests for bugs in the
  scripts found in the Tools directory.

567
- Issue #6884: Fix long-standing bugs with MANIFEST.in parsing in distutils
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  on Windows.  Also fixed in packaging.
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- Issue #8033: sqlite3: Fix 64-bit integer handling in user functions
  on 32-bit architectures. Initial patch by Philippe Devalkeneer.

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- HTMLParser is now able to handle slashes in the start tag.

575 576 577
- Issue #13641: Decoding functions in the base64 module now accept ASCII-only
  unicode strings.  Patch by Catalin Iacob.

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- Issue #14043: Speed up importlib's _FileFinder by at least 8x, and add a
  new importlib.invalidate_caches() function.

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- Issue #14001: CVE-2012-0845: xmlrpc: Fix an endless loop in
  SimpleXMLRPCServer upon malformed POST request.

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- Issue #13961: Move importlib over to using os.replace() for atomic renaming.

586 587 588
- Do away with ambiguous level values (as suggested by PEP 328) in
  importlib.__import__() by raising ValueError when level < 0.

589 590
- Issue #2489: pty.spawn could consume 100% cpu when it encountered an EOF.

591 592
- Issue #13014: Fix a possible reference leak in SSLSocket.getpeercert().

593 594 595
- Issue #13777: Add PF_SYSTEM sockets on OS X.
  Patch by Michael Goderbauer.

596 597 598
- Issue #13015: Fix a possible reference leak in defaultdict.__repr__.
  Patch by Suman Saha.

599 600 601
- Issue #1326113: distutils' and packaging's build_ext commands option now
  correctly parses multiple values (separated by whitespace or commas) given
  to their --libraries option.
602

603 604 605 606
- Issue #10287: nntplib now queries the server's CAPABILITIES first before
  sending MODE READER, and only sends it if not already in READER mode.
  Patch by Hynek Schlawack.

607 608 609
- Issue #13993: HTMLParser is now able to handle broken end tags when
  strict=False.

610 611 612 613
- Issue #13930: lib2to3 now supports writing converted output files to another
  directory tree as well as copying unchanged files and altering the file
  suffix.

614 615 616 617
- Issue #9750: Fix sqlite3.Connection.iterdump on tables and fields
  with a name that is a keyword or contains quotes. Patch by Marko
  Kohtala.

618 619 620 621
- Issue #10287: nntplib now queries the server's CAPABILITIES again after
  authenticating (since the result may change, according to RFC 4643).
  Patch by Hynek Schlawack.

622 623 624
- Issue #13989: Document that GzipFile does not support text mode, and give a
  more helpful error message when opened with an invalid mode string.

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- Issue #13590: On OS X 10.7 and 10.6 with Xcode 4.2, building
  Distutils-based packages with C extension modules may fail because
  Apple has removed gcc-4.2, the version used to build python.org
  64-bit/32-bit Pythons.  If the user does not explicitly override
  the default C compiler by setting the CC environment variable,
  Distutils will now attempt to compile extension modules with clang
  if gcc-4.2 is required but not found. Also as a convenience, if
  the user does explicitly set CC, substitute its value as the default
  compiler in the Distutils LDSHARED configuration variable for OS X.
  (Note, the python.org 32-bit-only Pythons use gcc-4.0 and the 10.4u
  SDK, neither of which are available in Xcode 4.  This change does not
  attempt to override settings to support their use with Xcode 4.)

638 639 640
- Issue #13960: HTMLParser is now able to handle broken comments when
  strict=False.

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- Issue #13921: Undocument and clean up sqlite3.OptimizedUnicode,
  which is obsolete in Python 3.x. It's now aliased to str for
  backwards compatibility.

645
- When '' is a path (e.g. in sys.path), make sure __file__ uses the current
Brett Cannon's avatar
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646
  working directory instead of '' in importlib.
647

648 649 650 651
- Issue #13609: Add two functions to query the terminal size:
  os.get_terminal_size (low level) and shutil.get_terminal_size (high level).
  Patch by Zbigniew Jędrzejewski-Szmek.

652 653 654
- Issue #13845: On Windows, time.time() now uses GetSystemTimeAsFileTime()
  instead of ftime() to have a resolution of 100 ns instead of 1 ms (the clock
  accuracy is between 0.5 ms and 15 ms).
655

656 657
- Issue #13846: Add time.monotonic(), monotonic clock.

658 659 660 661 662
- Issue #8184: multiprocessing: On Windows, don't set SO_REUSEADDR on
  Connection sockets, and set FILE_FLAG_FIRST_PIPE_INSTANCE on named pipes, to
  make sure two listeners can't bind to the same socket/pipe (or any existing
  socket/pipe).

663 664
- Issue #9021: Add an introduction to the copy module documentation.

665 666 667
- Issue #6005: Examples in the socket library documentation use sendall, where
  relevant, instead send method.

668 669 670
- Issue #10811: Fix recursive usage of cursors. Instead of crashing,
  raise a ProgrammingError now.

671 672
- Issue #10881: Fix test_site failure with OS X framework builds.

673
- Issue #964437: Make IDLE help window non-modal.
674 675
  Patch by Guilherme Polo and Roger Serwy.

676 677 678
- Issue #13734: Add os.fwalk(), a directory walking function yielding file
  descriptors.

679 680
- Issue #2945: Make the distutils upload command aware of bdist_rpm products.

681 682
- Issue #13712: pysetup create should not convert package_data to extra_files.

683 684
- Issue #11805: package_data in setup.cfg should allow more than one value.

685 686 687
- Issue #13933: IDLE auto-complete did not work with some imported
  module, like hashlib.  (Patch by Roger Serwy)

688 689
- Issue #13901: Prevent test_distutils failures on OS X with --enable-shared.

690 691
- Issue #13676: Handle strings with embedded zeros correctly in sqlite3.

692 693 694
- Issue #13506: Add '' to path for IDLE Shell when started and restarted with Restart Shell.
  Original patches by Marco Scataglini and Roger Serwy.

695 696 697
- Issue #8828: Add new function os.replace(), for cross-platform renaming
  with overwriting.

698 699 700
- Issue #13848: open() and the FileIO constructor now check for NUL
  characters in the file name.  Patch by Hynek Schlawack.

701 702 703
- Issue #13806: The size check in audioop decompression functions was too
  strict and could reject valid compressed data.  Patch by Oleg Plakhotnyuk.

704 705 706
- Issue #13812: When a multiprocessing Process child raises an exception,
  flush stderr after printing the exception traceback.

707 708 709
- Issue #13885: CVE-2011-3389: the _ssl module would always disable the CBC
  IV attack countermeasure.

710 711
- Issue #13847: time.localtime() and time.gmtime() now raise an OSError instead
  of ValueError on failure. time.ctime() and time.asctime() now raises an
712 713
  OSError if localtime() failed. time.clock() now raises a RuntimeError if the
  processor time used is not available or its value cannot be represented
714

715 716 717
- Issue #13862: Fix spurious failure in test_zlib due to runtime/compile time
  minor versions not matching.

718 719 720
- Issue #12804: Fix test_socket and test_urllib2net failures when running tests
  on a system without internet access.

721 722 723 724
- Issue #13772: In os.symlink() under Windows, do not try to guess the link
  target's type (file or directory).  The detection was buggy and made the
  call non-atomic (therefore prone to race conditions).

725
- Issue #6631: Disallow relative file paths in urllib urlopen methods.
726

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- Issue #13722: Avoid silencing ImportErrors when initializing the codecs
  registry.

730 731 732
- Issue #13781: Fix GzipFile bug that caused an exception to be raised when
  opening for writing using a fileobj returned by os.fdopen().

733 734 735
- Issue #13803: Under Solaris, distutils doesn't include bitness
  in the directory name.

736 737
- Issue #10278: Add time.wallclock() function, monotonic clock.

738 739 740
- Issue #13809: Fix regression where bz2 module wouldn't work when threads are
  disabled. Original patch by Amaury Forgeot d'Arc.

741 742 743
- Issue #13589: Fix some serialization primitives in the aifc module.
  Patch by Oleg Plakhotnyuk.

744 745 746
- Issue #13642: Unquote before b64encoding user:password during Basic
  Authentication. Patch contributed by Joonas Kuorilehto.

747 748 749
- Issue #13726: Fix the ambiguous -S flag in regrtest. It is -o/--slow for slow
  tests.

750 751 752 753
- Issue #12364: Fix a hang in concurrent.futures.ProcessPoolExecutor.
  The hang would occur when retrieving the result of a scheduled future after
  the executor had been shut down.

754 755 756
- Issue #13502: threading: Fix a race condition in Event.wait() that made it
  return False when the event was set and cleared right after.

757 758 759 760 761
- Issue #9993: When the source and destination are on different filesystems,
  and the source is a symlink, shutil.move() now recreates a symlink on the
  destination instead of copying the file contents.  Patch by Jonathan Niehof
  and Hynek Schlawack.

762 763
- Issue #12926: Fix a bug in tarfile's link extraction.

764 765
- Issue #13696: Fix the 302 Relative URL Redirection problem.

766 767 768
- Issue #13636: Weak ciphers are now disabled by default in the ssl module
  (except when SSLv2 is explicitly asked for).

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- Issue #12715: Add an optional symlinks argument to shutil functions
  (copyfile, copymode, copystat, copy, copy2).  When that parameter is
  true, symlinks aren't dereferenced and the operation instead acts on the
  symlink itself (or creates one, if relevant).  Patch by Hynek Schlawack.

774 775
- Add a flags parameter to select.epoll.

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Senthil Kumaran committed
776 777
- Issue #12798: Updated the mimetypes documentation.

778 779 780
- Issue #13626: Add support for SSL Diffie-Hellman key exchange, through the
  SSLContext.load_dh_params() method and the ssl.OP_SINGLE_DH_USE option.

781 782
- Issue #11006: Don't issue low level warning in subprocess when pipe2() fails.

783 784 785
- Issue #13620: Support for Chrome browser in webbrowser.py Patch contributed
  by Arnaud Calmettes.

786 787 788
- Issue #11829: Fix code execution holes in inspect.getattr_static for
  metaclasses with metaclasses. Patch by Andreas Stührk.

789 790 791
- Issue #12708: Add starmap() and starmap_async() methods (similar to
  itertools.starmap()) to multiprocessing.Pool.  Patch by Hynek Schlawack.

792 793
- Issue #1785: Fix inspect and pydoc with misbehaving descriptors.

794 795 796
- Issue #13637: "a2b" functions in the binascii module now accept ASCII-only
  unicode strings.

797 798
- Issue #13634: Add support for querying and disabling SSL compression.

799 800 801 802
- Issue #13627: Add support for SSL Elliptic Curve-based Diffie-Hellman
  key exchange, through the SSLContext.set_ecdh_curve() method and the
  ssl.OP_SINGLE_ECDH_USE option.

803 804 805 806
- Issue #13635: Add ssl.OP_CIPHER_SERVER_PREFERENCE, so that SSL servers
  choose the cipher based on their own preferences, rather than on the
  client's.

807
- Issue #11813: Fix inspect.getattr_static for modules. Patch by Andreas
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  Stührk.

810 811 812
- Issue #7502: Fix equality comparison for DocTestCase instances.  Patch by
  Cédric Krier.

813 814 815
- Issue #11870: threading: Properly reinitialize threads internal locks and
  condition variables to avoid deadlocks in child processes.

816 817 818
- Issue #8035: urllib: Fix a bug where the client could remain stuck after a
  redirection or an error.

819 820 821
- Issue #13560: os.strerror() now uses the current locale encoding instead of
  UTF-8.

822 823 824 825
- Issue #13560: Add PyUnicode_DecodeLocale(), PyUnicode_DecodeLocaleAndSize()
  and PyUnicode_EncodeLocale() functions to the C API to decode/encode from/to
  the current locale encoding.

826 827 828 829
- Issue #8373: The filesystem path of AF_UNIX sockets now uses the filesystem
  encoding and the surrogateescape error handler, rather than UTF-8.  Patch
  by David Watson.

830 831 832
- Issue #10350: Read and save errno before calling a function which might
  overwrite it.  Original patch by Hallvard B Furuseth.

833 834
- Issue #11610: Introduce a more general way to declare abstract properties.

835 836 837
- Issue #13591: A bug in importlib has been fixed that caused import_module
  to load a module twice.

Ned Deily's avatar
Ned Deily committed
838 839
- Issue #4625: If IDLE cannot write to its recent file or breakpoint
  files, display a message popup and continue rather than crash.
Ned Deily's avatar
Ned Deily committed
840 841
 (original patch by Roger Serwy)

842 843 844 845
- Issue #13449 sched.scheduler.run() method has a new "blocking" parameter which
  when set to False makes run() execute the scheduled events due to expire
  soonest (if any) and then return.  Patch by Giampaolo Rodolà.

846
- Issue #8684 sched.scheduler class can be safely used in multi-threaded
847
  environments.  Patch by Josiah Carlson and Giampaolo Rodolà.
848

849 850
- Alias resource.error to OSError ala PEP 3151.

851 852
- Issue #5689: Add support for lzma compression to the tarfile module.

853 854 855 856 857
- Issue #13248: Turn 3.2's PendingDeprecationWarning into 3.3's
  DeprecationWarning.  It covers 'cgi.escape', 'importlib.abc.PyLoader',
  'importlib.abc.PyPycLoader', 'nntplib.NNTP.xgtitle', 'nntplib.NNTP.xpath',
  and private attributes of 'smtpd.SMTPChannel'.

858 859
- Issue #5905, #13560: time.strftime() is now using the current locale
  encoding, instead of UTF-8, if the wcsftime() function is not available.
860

861 862 863
- Issue #8641: Update IDLE 3 syntax coloring to recognize b".." and not u"..".
  Patch by Tal Einat.

864 865 866
- Issue #13464: Add a readinto() method to http.client.HTTPResponse.  Patch
  by Jon Kuhn.

867 868 869
- tarfile.py: Correctly detect bzip2 compressed streams with blocksizes
  other than 900k.

870 871
- Issue #13439: Fix many errors in turtle docstrings.

872
- Issue #6715: Add a module 'lzma' for compression using the LZMA algorithm.
873
  Thanks to Per Øyvind Karlsen for the initial implementation.
874

875 876 877
- Issue #13487: Make inspect.getmodule robust against changes done to
  sys.modules while it is iterating over it.

878 879 880
- Issue #12618: Fix a bug that prevented py_compile from creating byte
  compiled files in the current directory.  Initial patch by Sjoerd de Vries.

881 882 883
- Issue #13444: When stdout has been closed explicitly, we should not attempt
  to flush it at shutdown and print an error.

884 885 886 887
- Issue #12567: The curses module uses Unicode functions for Unicode arguments
  when it is linked to the ncurses library. It encodes also Unicode strings to
  the locale encoding instead of UTF-8.

888 889 890 891
- Issue #12856: Ensure child processes do not inherit the parent's random
  seed for filename generation in the tempfile module.  Patch by Brian
  Harring.

892 893 894
- Issue #9957: SpooledTemporaryFile.truncate() now accepts an optional size
  parameter, as other file-like objects.  Patch by Ryan Kelly.

895 896 897
- Issue #13458: Fix a memory leak in the ssl module when decoding a
  certificate with a subjectAltName.  Patch by Robert Xiao.

898 899
- Issue #13415: os.unsetenv() doesn't ignore errors anymore.

Giampaolo Rodola's avatar
Giampaolo Rodola committed
900 901 902
- Issue #13245: sched.scheduler class constructor's timefunc and
  delayfunct parameters are now optional.
  scheduler.enter and scheduler.enterabs methods gained a new kwargs parameter.
903
  Patch contributed by Chris Clark.
Giampaolo Rodola's avatar
Giampaolo Rodola committed
904

905 906 907 908
- Issue #12328: Under Windows, refactor handling of Ctrl-C events and
  make _multiprocessing.win32.WaitForMultipleObjects interruptible when
  the wait_flag parameter is false.  Patch by sbt.

909 910 911 912 913 914
- Issue #13322: Fix BufferedWriter.write() to ensure that BlockingIOError is
  raised when the wrapped raw file is non-blocking and the write would block.
  Previous code assumed that the raw write() would raise BlockingIOError, but
  RawIOBase.write() is defined to returned None when the call would block.
  Patch by sbt.

915 916
- Issue #13358: HTMLParser now calls handle_data only once for each CDATA.

917 918 919 920
- Issue #4147: minidom's toprettyxml no longer adds whitespace around a text
  node when it is the only child of an element.  Initial patch by Dan
  Kenigsberg.

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- Issue #13374: The Windows bytes API has been deprecated in the os module. Use
  Unicode filenames instead of bytes filenames to not depend on the ANSI code
  page anymore and to support any filename.

925 926
- Issue #13297: Use bytes type to send and receive binary data through XMLRPC.

927 928 929
- Issue #6397: Support "/dev/poll" polling objects in select module,
  under Solaris & derivatives.

930 931 932
- Issues #1745761, #755670, #13357, #12629, #1200313: HTMLParser now correctly
  handles non-valid attributes, including adjacent and unquoted attributes.

933 934
- Issue #13193: Fix distutils.filelist.FileList and packaging.manifest.Manifest
  under Windows.
Antoine Pitrou's avatar
Antoine Pitrou committed
935

936 937
- Issue #13384: Remove unnecessary __future__ import in Lib/random.py

938 939
- Issue #13149: Speed up append-only StringIO objects.

940 941 942
- Issue #13373: multiprocessing.Queue.get() could sometimes block indefinitely
  when called with a timeout.  Patch by Arnaud Ysmal.

943 944 945
- Issue #13254: Fix Maildir initialization so that maildir contents
  are read correctly.

946
- Issue #3067: locale.setlocale() now raises TypeError if the second
947 948
  argument is an invalid iterable. Its documentation and docstring
  were also updated. Initial patch by Jyrki Pulliainen.
949

950 951
- Issue #13140: Fix the daemon_threads attribute of ThreadingMixIn.

952 953 954
- Issue #13339: Fix compile error in posixmodule.c due to missing semicolon.
  Thanks to Robert Xiao.

955 956 957
- Byte compilation in packaging is now isolated from the calling Python -B or
  -O options, instead of being disallowed under -B or buggy under -O.

958
- Issue #10570: curses.putp() and curses.tparm() are now expecting a byte
959
  string, instead of a Unicode string.
960

961 962
- Issue #13295: http.server now produces valid HTML 4.01 strict.

963 964
- Issue #2892: preserve iterparse events in case of SyntaxError.

965
- Issue #13287: urllib.request and urllib.error now contains an __all__
Éric Araujo's avatar
Éric Araujo committed
966
  attribute to expose only relevant classes and functions.  Patch by Florent
967
  Xicluna.
968

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- Issue #670664: Fix HTMLParser to correctly handle the content of
  ``<script>...</script>`` and ``<style>...</style>``.

- Issue #10817: Fix urlretrieve function to raise ContentTooShortError even
973 974
  when reporthook is None. Patch by Jyrki Pulliainen.

975
- Issue #13296: Fix IDLE to clear compile __future__ flags on shell restart.
976 977
  (Patch by Roger Serwy)

978 979 980
- Fix the xmlrpc.client user agent to return something similar to
  urllib.request user agent: "Python-xmlrpc/3.3".

981 982 983
- Issue #13293: Better error message when trying to marshal bytes using
  xmlrpc.client.

984 985
- Issue #13291: NameError in xmlrpc package.

986 987
- Issue #13258: Use callable() built-in in the standard library.

988 989 990
- Issue #13273: fix a bug that prevented HTMLParser to properly detect some
  tags when strict=False.

991 992 993
- Issue #11183: Add finer-grained exceptions to the ssl module, so that
  you don't have to inspect the exception's attributes in the common case.

994
- Issue #13216: Add cp65001 codec, the Windows UTF-8 (CP_UTF8).
995

Victor Stinner's avatar
Victor Stinner committed
996
- Issue #13226: Add RTLD_xxx constants to the os module. These constants can be
997 998
  used with sys.setdlopenflags().

999 1000 1001 1002
- Issue #10278: Add clock_getres(), clock_gettime() and CLOCK_xxx constants to
  the time module. time.clock_gettime(time.CLOCK_MONOTONIC) provides a
  monotonic clock

1003 1004 1005
- Issue #10332: multiprocessing: fix a race condition when a Pool is closed
  before all tasks have completed.

1006 1007
- Issue #13255: wrong docstrings in array module.

1008 1009
- Issue #8540: Remove deprecated Context._clamp attribute in Decimal module.

1010 1011
- Issue #13235: Added PendingDeprecationWarning to warn() method and function.

1012 1013
- Issue #9168: now smtpd is able to bind privileged port.

1014 1015 1016
- Issue #12529: fix cgi.parse_header issue on strings with double-quotes and
  semicolons together. Patch by Ben Darnell and Petri Lehtinen.

1017 1018 1019
- Issue #13227: functools.lru_cache() now has a option to distinguish
  calls with different argument types.

1020 1021
- Issue #6090: zipfile raises a ValueError when a document with a timestamp
  earlier than 1980 is provided. Patch contributed by Petri Lehtinen.
1022

1023 1024 1025 1026
- Issue #13150: sysconfig no longer parses the Makefile and config.h files
  when imported, instead doing it at build time.  This makes importing
  sysconfig faster and reduces Python startup time by 20%.

Ezio Melotti's avatar
Ezio Melotti committed
1027 1028
- Issue #12448: smtplib now flushes stdout while running ``python -m smtplib``
  in order to display the prompt correctly.
1029

1030 1031 1032
- Issue #12454: The mailbox module is now using ASCII, instead of the locale
  encoding, to read and write MH mailboxes (.mh_sequences files).

1033 1034
- Issue #13194: zlib.compressobj().copy() and zlib.decompressobj().copy() are
  now available on Windows.
1035

1036 1037 1038
- issue #1673007: urllib2  to support HEAD request via new method argument.
  Patch contributions by David Stanek, Patrick Westerhoff and Ezio Melotti.

1039 1040
- Issue #12386: packaging does not fail anymore when writing the RESOURCES
  file.
1041

1042 1043
- Issue #13158: Fix decoding and encoding of GNU tar specific base-256 number
  fields in tarfile.
1044

1045 1046
- Issue #13025: mimetypes is now reading MIME types using the UTF-8 encoding,
  instead of the locale encoding.
1047

1048 1049
- Issue #10653: On Windows, use strftime() instead of wcsftime() because
  wcsftime() doesn't format time zone correctly.
1050

1051 1052 1053
- Issue #13150: The tokenize module doesn't compile large regular expressions
  at startup anymore.

Éric Araujo's avatar
Éric Araujo committed
1054 1055
- Issue #11171: Fix distutils.sysconfig.get_makefile_filename when Python was
  configured with different prefix and exec-prefix.
1056

1057
- Issue #11254: Teach distutils and packaging to compile .pyc and .pyo files in
1058
  PEP 3147-compliant __pycache__ directories.
1059

Ned Deily's avatar
Ned Deily committed
1060 1061
- Issue #7367: Fix pkgutil.walk_paths to skip directories whose
  contents cannot be read.
1062

1063 1064 1065
- Issue #3163: The struct module gets new format characters 'n' and 'N'
  supporting C integer types ``ssize_t`` and ``size_t``, respectively.

1066 1067
- Issue #13099: Fix sqlite3.Cursor.lastrowid under a Turkish locale.
  Reported and diagnosed by Thomas Kluyver.
1068

1069 1070 1071
- Issue #13087: BufferedReader.seek() now always raises UnsupportedOperation
  if the underlying raw stream is unseekable, even if the seek could be
  satisfied using the internal buffer.  Patch by John O'Connor.
1072

1073 1074 1075
- Issue #7689: Allow pickling of dynamically created classes when their
  metaclass is registered with copyreg.  Patch by Nicolas M. Thiéry and Craig
  Citro.
1076

1077 1078
- Issue #4147: minidom's toprettyxml no longer adds whitespace to text nodes.

1079 1080 1081
- Issue #13034: When decoding some SSL certificates, the subjectAltName
  extension could be unreported.

1082 1083 1084 1085
- Issue #9871: Prevent IDLE 3 crash when given byte stings
  with invalid hex escape sequences, like b'\x0'.
  (Original patch by Claudiu Popa.)

1086 1087 1088
- Issue #12306: Expose the runtime version of the zlib C library as a constant,
  ZLIB_RUNTIME_VERSION, in the zlib module. Patch by Torsten Landschoff.

1089
- Issue #12959: Add collections.ChainMap to collections.__all__.
1090

1091 1092 1093
- Issue #8933: distutils' PKG-INFO files and packaging's METADATA files will
  now correctly report Metadata-Version: 1.1 instead of 1.0 if a Classifier or
  Download-URL field is present.
1094

1095 1096 1097
- Issue #12567: Add curses.unget_wch() function. Push a character so the next
  get_wch() will return it.

1098
- Issue #9561: distutils and packaging now writes egg-info files using UTF-8,
1099 1100
  instead of the locale encoding.

1101 1102 1103
- Issue #8286: The distutils command sdist will print a warning message instead
  of crashing when an invalid path is given in the manifest template.

1104 1105 1106 1107 1108
- Issue #12841: tarfile unnecessarily checked the existence of numerical user
  and group ids on extraction. If one of them did not exist the respective id
  of the current user (i.e. root) was used for the file and ownership
  information was lost.

Ezio Melotti's avatar
Ezio Melotti committed
1109 1110 1111
- Issue #12888: Fix a bug in HTMLParser.unescape that prevented it to escape
  more than 128 entities.  Patch by Peter Otten.

1112 1113
- Issue #12878: Expose a __dict__ attribute on io.IOBase and its subclasses.

1114 1115
- Issue #12636: IDLE reads the coding cookie when executing a Python script.

1116 1117 1118 1119
- Issue #12494: On error, call(), check_call(), check_output() and
  getstatusoutput() functions of the subprocess module now kill the process,
  read its status (to avoid zombis) and close pipes.

Benjamin Peterson's avatar
Benjamin Peterson committed
1120 1121
- Issue #12720: Expose low-level Linux extended file attribute functions in os.

Éric Araujo's avatar
Éric Araujo committed
1122
- Issue #10946: The distutils commands bdist_dumb, bdist_wininst and bdist_msi
1123 1124
  now respect a --skip-build option given to bdist.  The packaging commands
  were fixed too.
Éric Araujo's avatar
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1125

1126 1127 1128
- Issue #12847: Fix a crash with negative PUT and LONG_BINPUT arguments in
  the C pickle implementation.

1129 1130 1131
- Issue #11564: Avoid crashes when trying to pickle huge objects or containers
  (more than 2**31 items).  Instead, in most cases, an OverflowError is raised.

1132 1133 1134
- Issue #12287: Fix a stack corruption in ossaudiodev module when the FD is
  greater than FD_SETSIZE.

1135 1136 1137
- Issue #12839: Fix crash in zlib module due to version mismatch.
  Fix by Richard M. Tew.

1138 1139 1140
- Issue #9923: The mailcap module now correctly uses the platform path
  separator for the MAILCAP environment variable on non-POSIX platforms.

1141 1142 1143 1144
- Issue #12835: Follow up to #6560 that unconditionally prevents use of the
  unencrypted sendmsg/recvmsg APIs on SSL wrapped sockets. Patch by David
  Watson.

1145 1146 1147
- Issue #12803: SSLContext.load_cert_chain() now accepts a password argument
  to be used if the private key is encrypted.  Patch by Adam Simpkins.

1148 1149 1150
- Issue #11657: Fix sending file descriptors over 255 over a multiprocessing
  Pipe.

1151 1152 1153
- Issue #12811: tabnanny.check() now promptly closes checked files. Patch by
  Anthony Briggs.

1154 1155
- Issue #6560: The sendmsg/recvmsg API is now exposed by the socket module
  when provided by the underlying platform, supporting processing of
1156
  ancillary data in pure Python code. Patch by David Watson and Heiko Wundram.
1157

1158 1159 1160 1161
- Issue #12326: On Linux, sys.platform doesn't contain the major version
  anymore. It is now always 'linux', instead of 'linux2' or 'linux3' depending
  on the Linux version used to build Python.

1162 1163 1164
- Issue #12213: Fix a buffering bug with interleaved reads and writes that
  could appear on BufferedRandom streams.

1165 1166 1167
- Issue #12778: Reduce memory consumption when JSON-encoding a large
  container of many small objects.

1168 1169 1170
- Issue #12650: Fix a race condition where a subprocess.Popen could leak
  resources (FD/zombie) when killed at the wrong time.

1171 1172 1173
- Issue #12744: Fix inefficient representation of integers between 2**31 and
  2**63 on systems with a 64-bit C "long".

1174 1175 1176
- Issue #12646: Add an 'eof' attribute to zlib.Decompress, to make it easier to
  detect truncated input streams.

1177 1178 1179
- Issue #11513: Fix exception handling ``tarfile.TarFile.gzopen()`` when
  the file cannot be opened.

1180 1181 1182
- Issue #12687: Fix a possible buffering bug when unpickling text mode
  (protocol 0, mostly) pickles.

Senthil Kumaran's avatar
Senthil Kumaran committed
1183 1184
- Issue #10087: Fix the html output format of the calendar module.

1185 1186 1187
- Issue #12540: Prevent zombie IDLE processes on Windows due to changes
  in os.kill().

1188
- Add support for unary plus and unary minus to collections.Counter().
Éric Araujo's avatar
Éric Araujo committed
1189
  Issue #13121: Also add support for inplace math operators.
1190

1191 1192
- Issue #12683: urlparse updated to include svn as schemes that uses relative
  paths. (svn from 1.5 onwards support relative path).
1193

1194 1195 1196 1197 1198
- Issue #12655: Expose functions from sched.h in the os module: sched_yield(),
  sched_setscheduler(), sched_getscheduler(), sched_setparam(),
  sched_get_min_priority(), sched_get_max_priority(), sched_rr_get_interval(),
  sched_getaffinity(), sched_setaffinity().

1199 1200
- Add ThreadError to threading.__all__.

1201 1202
- Issues #11104, #8688: Fix the behavior of distutils' sdist command with
  manually-maintained MANIFEST files.
1203

1204 1205 1206 1207
- Issue #11281: smtplib.STMP gets source_address parameter, which adds the
  ability to bind to specific source address on a machine with multiple
  interfaces. Patch by Paulo Scardine.

1208 1209
- Issue #12464: tempfile.TemporaryDirectory.cleanup() should not follow
  symlinks: fix it. Patch by Petri Lehtinen.
1210

Éric Araujo's avatar
Éric Araujo committed
1211 1212
- Issue #8887: "pydoc somebuiltin.somemethod" (or help('somebuiltin.somemethod')
  in Python code) now finds the doc of the method.
1213

1214 1215 1216 1217 1218 1219 1220
- Issue #10968: Remove indirection in threading.  The public names (Thread,
  Condition, etc.) used to be factory functions returning instances of hidden
  classes (_Thread, _Condition, etc.), because (if Guido recalls correctly) this
  code pre-dates the ability to subclass extension types.  It is now possible to
  inherit from Thread and other classes, without having to import the private
  underscored names like multiprocessing did.

1221 1222 1223
- Issue #9723: Add shlex.quote functions, to escape filenames and command
  lines.

1224 1225
- Issue #12603: Fix pydoc.synopsis() on files with non-negative st_mtime.

1226 1227 1228
- Issue #12514: Use try/finally to assure the timeit module restores garbage
  collections when it is done.

1229 1230 1231
- Issue #12607: In subprocess, fix issue where if stdin, stdout or stderr is
  given as a low fd, it gets overwritten.

1232 1233 1234
- Issue #12590: IDLE editor window now always displays the first line
  when opening a long file.  With Tk 8.5, the first line was hidden.

1235 1236 1237
- Issue #12576: Fix urlopen behavior on sites which do not send (or obfuscates)
  Connection:close header.

1238 1239 1240
- Issue #12102: Document that buffered files must be flushed before being used
  with mmap. Patch by Steffen Daode Nurpmeso.

1241 1242
- Issue #12560: Build libpython.so on OpenBSD. Patch by Stefan Sperling.

1243 1244
- Issue #1813: Fix codec lookup under Turkish locales.

1245 1246 1247
- Issue #12591: Improve support of "universal newlines" in the subprocess
  module: the piped streams can now be properly read from or written to.

1248 1249 1250 1251
- Issue #12591: Allow io.TextIOWrapper to work with raw IO objects (without
  a read1() method), and add a *write_through* parameter to mandate
  unbuffered writes.

1252 1253
- Issue #10883: Fix socket leaks in urllib.request when using FTP.

1254 1255
- Issue #12592: Make Python build on OpenBSD 5 (and future major releases).

1256 1257
- Issue #12372: POSIX semaphores are broken on AIX: don't use them.

1258 1259 1260 1261 1262 1263
- Issue #12551: Provide a get_channel_binding() method on SSL sockets so as
  to get channel binding data for the current SSL session (only the
  "tls-unique" channel binding is implemented).  This allows the implementation
  of certain authentication mechanisms such as SCRAM-SHA-1-PLUS.  Patch by
  Jacek Konieczny.

1264 1265 1266
- Issue #665194: email.utils now has format_datetime and parsedate_to_datetime
  functions, allowing for round tripping of RFC2822 format dates.

1267 1268 1269 1270
- Issue #12571: Add a plat-linux3 directory mirroring the plat-linux2
  directory, so that "import DLFCN" and other similar imports work on
  Linux 3.0.

1271 1272 1273
- Issue #7484: smtplib no longer puts <> around addresses in VRFY and EXPN
  commands; they aren't required and in fact postfix doesn't support that form.

Benjamin Peterson's avatar
Benjamin Peterson committed
1274 1275 1276
- Issue #12273: Remove ast.__version__. AST changes can be accounted for by
  checking sys.version_info or sys._mercurial.

1277 1278 1279
- Silence spurious "broken pipe" tracebacks when shutting down a
  ProcessPoolExecutor.

1280 1281 1282
- Fix potential resource leaks in concurrent.futures.ProcessPoolExecutor
  by joining all queues and processes when shutdown() is called.

1283 1284 1285
- Issue #11603: Fix a crash when __str__ is rebound as __repr__.  Patch by
  Andreas Stührk.

1286 1287 1288
- Issue #11321: Fix a crash with multiple imports of the _pickle module when
  embedding Python.  Patch by Andreas Stührk.

1289 1290 1291
- Issue #6755: Add get_wch() method to curses.window class. Patch by Iñigo
  Serna.

1292 1293
- Add cgi.closelog() function to close the log file.

1294 1295
- Issue #12502: asyncore: fix polling loop with AF_UNIX sockets.

1296 1297 1298
- Issue #4376: ctypes now supports nested structures in a endian different than
  the parent structure. Patch by Vlad Riscutia.

1299 1300 1301
- Raise ValueError when attempting to set the _CHUNK_SIZE attribute of a
  TextIOWrapper to a huge value, not TypeError.

1302 1303 1304
- Issue #12504: Close file handles in a timely manner in packaging.database.
  This fixes a bug with the remove (uninstall) feature on Windows.

1305 1306 1307
- Issues #12169 and #10510: Factor out code used by various packaging commands
  to make HTTP POST requests, and make sure it uses CRLF.

1308 1309 1310 1311
- Issue #12016: Multibyte CJK decoders now resynchronize faster. They only
  ignore the first byte of an invalid byte sequence. For example,
  b'\xff\n'.decode('gb2312', 'replace') gives '\ufffd\n' instead of '\ufffd'.

1312 1313 1314 1315
- Issue #12459: time.sleep() now raises a ValueError if the sleep length is
  negative, instead of an infinite sleep on Windows or raising an IOError on
  Linux for example, to have the same behaviour on all platforms.

1316 1317 1318 1319
- Issue #12451: pydoc: html_getfile() now uses tokenize.open() to support
  Python scripts using a encoding different than UTF-8 (read the coding cookie
  of the script).

1320 1321 1322
- Issue #12493: subprocess: Popen.communicate() now also handles EINTR errors
  if the process has only one pipe.

1323 1324 1325
- Issue #12467: warnings: fix a race condition if a warning is emitted at
  shutdown, if globals()['__file__'] is None.

1326 1327 1328
- Issue #12451: pydoc: importfile() now opens the Python script in binary mode,
  instead of text mode using the locale encoding, to avoid encoding issues.

1329 1330 1331 1332
- Issue #12451: runpy: run_path() now opens the Python script in binary mode,
  instead of text mode using the locale encoding, to support other encodings
  than UTF-8 (scripts using the coding cookie).

1333 1334 1335
- Issue #12451: xml.dom.pulldom: parse() now opens files in binary mode instead
  of the text mode (using the locale encoding) to avoid encoding issues.

1336 1337 1338
- Issue #12147: Adjust the new-in-3.2 smtplib.send_message method for better
  conformance to the RFCs:  correctly handle Sender and Resent- headers.

1339 1340
- Issue #12352: Fix a deadlock in multiprocessing.Heap when a block is freed by
  the garbage collector while the Heap lock is held.
1341

1342 1343 1344 1345
- Issue #12462: time.sleep() now calls immediatly the (Python) signal handler
  if it is interrupted by a signal, instead of having to wait until the next
  instruction.

1346 1347 1348
- Issue #12442: new shutil.disk_usage function, providing total, used and free
  disk space statistics.

1349 1350 1351 1352 1353
- Issue #12451: The XInclude default loader of xml.etree now decodes files from
  UTF-8 instead of the locale encoding if the encoding is not specified. It now
  also opens XML files for the parser in binary mode instead of the text mode
  to avoid encoding issues.

1354 1355 1356
- Issue #12451: doctest.debug_script() doesn't create a temporary file
  anymore to avoid encoding issues.

1357 1358 1359
- Issue #12451: pydoc.synopsis() now reads the encoding cookie if available,
  to read the Python script from the right encoding.

1360 1361 1362
- Issue #12451: distutils now opens the setup script in binary mode to read the
  encoding cookie, instead of opening it in UTF-8.

Ned Deily's avatar
Ned Deily committed
1363 1364 1365 1366 1367 1368 1369 1370 1371
- Issue #9516: On Mac OS X, change Distutils to no longer globally attempt to
  check or set the MACOSX_DEPLOYMENT_TARGET environment variable for the
  interpreter process.  This could cause failures in non-Distutils subprocesses
  and was unreliable since tests or user programs could modify the interpreter
  environment after Distutils set it.  Instead, have Distutils set the the
  deployment target only in the environment of each build subprocess.  It is
  still possible to globally override the default by setting
  MACOSX_DEPLOYMENT_TARGET before launching the interpreter; its value must be
  greater or equal to the default value, the value with which the interpreter
1372
  was built.  Also, implement the same handling in packaging.
Ned Deily's avatar
Ned Deily committed
1373

1374 1375 1376
- Issue #12422: In the copy module, don't store objects that are their own copy
  in the memo dict.

1377 1378
- Issue #12303: Add sigwaitinfo() and sigtimedwait() to the signal module.

1379 1380 1381
- Issue #12404: Remove C89 incompatible code from mmap module. Patch by Akira
  Kitada.

1382 1383 1384
- Issue #1874: email now detects and reports as a defect the presence of
  any CTE other than 7bit, 8bit, or binary on a multipart.

1385 1386 1387
- Issue #12383: Fix subprocess module with env={}: don't copy the environment
  variables, start with an empty environment.

1388 1389 1390 1391
- Issue #11637: Fix support for importing packaging setup hooks from the
  project directory.

- Issue #6771: Moved the curses.wrapper function from the single-function
1392 1393 1394
  wrapper module into __init__, eliminating the module.  Since __init__ was
  already importing the function to curses.wrapper, there is no API change.

1395
- Issue #11584: email.header.decode_header no longer fails if the header
1396 1397
  passed to it is a Header object, and Header/make_header no longer fail
  if given binary unknown-8bit input.
1398

1399 1400 1401
- Issue #11700: mailbox proxy object close methods can now be called multiple
  times without error.

1402 1403
- Issue #11767: Correct file descriptor leak in mailbox's __getitem__ method.

1404 1405 1406 1407
- Issue #12133: AbstractHTTPHandler.do_open() of urllib.request closes the HTTP
  connection if its getresponse() method fails with a socket error. Patch
  written by Ezio Melotti.

1408 1409 1410
- Issue #12240: Allow multiple setup hooks in packaging's setup.cfg files.
  Original patch by Erik Bray.

1411 1412 1413
- Issue #9284: Allow inspect.findsource() to find the source of doctest
  functions.

1414 1415 1416 1417
- Issue #11595: Fix assorted bugs in packaging.util.cfg_to_args, a
  compatibility helper for the distutils-packaging transition.  Original patch
  by Erik Bray.

1418 1419 1420
- Issue #12287: In ossaudiodev, check that the device isn't closed in several
  methods.

Benjamin Peterson's avatar
Benjamin Peterson committed
1421
- Issue #12009: Fixed regression in netrc file comment handling.
1422

1423 1424 1425 1426
- Issue #12246: Warn and fail when trying to install a third-party project from
  an uninstalled Python (built in a source checkout).  Original patch by
  Tshepang Lekhonkhobe.

1427 1428
- Issue #10694: zipfile now ignores garbage at the end of a zipfile.

1429 1430
- Issue #12283: Fixed regression in smtplib quoting of leading dots in DATA.

1431 1432 1433
- Issue #10424: Argparse now includes the names of the missing required
  arguments in the missing arguments error message.

1434 1435 1436
- Issue #12168: SysLogHandler now allows NUL termination to be controlled using
  a new 'append_nul' attribute on the handler.

1437 1438 1439
- Issue #11583: Speed up os.path.isdir on Windows by using GetFileAttributes
  instead of os.stat.

1440 1441 1442
- Issue #12021: Make mmap's read() method argument optional. Patch by Petri
  Lehtinen.

1443 1444 1445 1446
- Issue #9205: concurrent.futures.ProcessPoolExecutor now detects killed
  children and raises BrokenProcessPool in such a situation.  Previously it
  would reliably freeze/deadlock.

1447 1448 1449 1450
- Issue #12040: Expose a new attribute ``sentinel`` on instances of
  :class:`multiprocessing.Process`.  Also, fix Process.join() to not use
  polling anymore, when given a timeout.

1451 1452 1453
- Issue #11893: Remove obsolete internal wrapper class ``SSLFakeFile`` in the
  smtplib module.  Patch by Catalin Iacob.

1454 1455 1456
- Issue #12080: Fix a Decimal.power() case that took an unreasonably long time
  to compute.

1457 1458 1459 1460
- Issue #12221: Remove __version__ attributes from pyexpat, pickle, tarfile,
  pydoc, tkinter, and xml.parsers.expat. This were useless version constants
  left over from the Mercurial transition

Raymond Hettinger's avatar
merge  
Raymond Hettinger committed
1461
- Named tuples now work correctly with vars().
1462

1463 1464 1465 1466
- Issue #12085: Fix an attribute error in subprocess.Popen destructor if the
  constructor has failed, e.g. because of an undeclared keyword argument. Patch
  written by Oleg Oshmyan.

1467
- Issue #12028: Make threading._get_ident() public, rename it to
1468
  threading.get_ident() and document it. This function was already used using
1469 1470
  _thread.get_ident().

1471 1472 1473
- Issue #12171: IncrementalEncoder.reset() of CJK codecs (multibytecodec) calls
  encreset() instead of decreset().

1474 1475
- Issue #12218: Removed wsgiref.egg-info.

1476
- Issue #12196: Add pipe2() to the os module.
1477

1478 1479 1480
- Issue #985064: Make plistlib more resilient to faulty input plists.
  Patch by Mher Movsisyan.

1481 1482 1483
- Issue #1625: BZ2File and bz2.decompress() now support multi-stream files.
  Initial patch by Nir Aides.

1484 1485
- Issue #12175: BufferedReader.read(-1) now calls raw.readall() if available.

1486 1487 1488
- Issue #12175: FileIO.readall() now only reads the file position and size
  once.

1489 1490 1491 1492 1493 1494 1495 1496 1497 1498
- Issue #12175: RawIOBase.readall() now returns None if read() returns None.

- Issue #12175: FileIO.readall() now raises a ValueError instead of an IOError
  if the file is closed.

- Issue #11109: New service_action method for BaseServer, used by ForkingMixin
  class for cleanup. Initial Patch by Justin Wark.

- Issue #12045: Avoid duplicate execution of command in
  ctypes.util._get_soname().  Patch by Sijin Joseph.
Senthil Kumaran's avatar
Senthil Kumaran committed
1499

1500 1501 1502
- Issue #10818: Remove the Tk GUI and the serve() function of the pydoc module,
  pydoc -g has been deprecated in Python 3.2 and it has a new enhanced web
  server.
1503

1504 1505 1506
- Issue #1441530: In imaplib, read the data in one chunk to speed up large
  reads and simplify code.

1507 1508 1509
- Issue #12070: Fix the Makefile parser of the sysconfig module to handle
  correctly references to "bogus variable" (e.g. "prefix=$/opt/python").

1510 1511 1512 1513
- Issue #12100: Don't reset incremental encoders of CJK codecs at each call to
  their encode() method anymore, but continue to call the reset() method if the
  final argument is True.

1514 1515 1516
- Issue #12049: Add RAND_bytes() and RAND_pseudo_bytes() functions to the ssl
  module.

1517 1518 1519
- Issue #6501: os.device_encoding() returns None on Windows if the application
  has no console.

1520 1521
- Issue #12105: Add O_CLOEXEC to the os module.

1522 1523 1524 1525
- Issue #12079: Decimal('Infinity').fma(Decimal('0'), (3.91224318126786e+19+0j))
  now raises TypeError (reflecting the invalid type of the 3rd argument) rather
  than Decimal.InvalidOperation.

1526 1527 1528
- Issue #12124: zipimport doesn't keep a reference to zlib.decompress() anymore
  to be able to unload the module.

1529 1530
- Add the packaging module, an improved fork of distutils (also known as
  distutils2).
1531

1532 1533 1534
- Issue #12065: connect_ex() on an SSL socket now returns the original errno
  when the socket's timeout expires (it used to return None).

1535 1536 1537 1538
- Issue #8809: The SMTP_SSL constructor and SMTP.starttls() now support
  passing a ``context`` argument pointing to an ssl.SSLContext instance.
  Patch by Kasun Herath.

1539 1540 1541
- Issue #11088: don't crash when using F5 to run a script in IDLE on MacOSX
  with Tk 8.5.

1542 1543 1544
- Issue #9516: Issue #9516: avoid errors in sysconfig when MACOSX_DEPLOYMENT_TARGET
  is set in shell.

1545 1546 1547 1548 1549
- Issue #8650: Make zlib module 64-bit clean. compress(), decompress() and
  their incremental counterparts now raise OverflowError if given an input
  larger than 4GB, instead of silently truncating the input and returning
  an incorrect result.

1550 1551 1552
- Issue #12050: zlib.decompressobj().decompress() now clears the unconsumed_tail
  attribute when called without a max_length argument.

1553 1554 1555 1556 1557
- Issue #12062: Fix a flushing bug when doing a certain type of I/O sequence
  on a file opened in read+write mode (namely: reading, seeking a bit forward,
  writing, then seeking before the previous write but still within buffered
  data, and writing again).

1558 1559 1560
- Issue #9971: Write an optimized implementation of BufferedReader.readinto().
  Patch by John O'Connor.

1561 1562 1563
- Issue #1028: Tk returns invalid Unicode null in %A: UnicodeDecodeError.
  With Tk < 8.5 _tkinter.c:PythonCmd() raised UnicodeDecodeError, caused
  IDLE to exit.  Converted to valid Unicode null in PythonCmd().
1564

1565 1566 1567 1568
- Issue #11799: urllib.request Authentication Handlers will raise a ValueError
  when presented with an unsupported Authentication Scheme. Patch contributed
  by Yuval Greenfield.

1569 1570 1571 1572 1573
- Issue #10419, #6011: build_scripts command of distutils handles correctly
  non-ASCII path (path to the Python executable). Open and write the script in
  binary mode, but ensure that the shebang is decodable from UTF-8 and from the
  encoding of the script.

1574 1575 1576
- Issue #8498: In socket.accept(), allow to specify 0 as a backlog value in
  order to accept exactly one connection.  Patch by Daniel Evers.

1577 1578 1579
- Issue #12011: signal.signal() and signal.siginterrupt() raise an OSError,
  instead of a RuntimeError: OSError has an errno attribute.

1580 1581 1582 1583
- Issue #3709: a flush_headers method to BaseHTTPRequestHandler which manages
  the sending of headers to output stream and flushing the internal headers
  buffer. Patch contribution by Andrew Schaaf

1584 1585
- Issue #11743: Rewrite multiprocessing connection classes in pure Python.

1586 1587
- Issue #11164: Stop trying to use _xmlplus in the xml module.

1588 1589 1590
- Issue #11888: Add log2 function to math module. Patch written by Mark
  Dickinson.

1591 1592
- Issue #12012: ssl.PROTOCOL_SSLv2 becomes optional.

1593 1594 1595 1596
- Issue #8407: The signal handler writes the signal number as a single byte
  instead of a nul byte into the wakeup file descriptor. So it is possible to
  wait more than one signal and know which signals were raised.

1597 1598 1599
- Issue #8407: Add pthread_kill(), sigpending() and sigwait() functions to the
  signal module.

1600 1601 1602
- Issue #11927: SMTP_SSL now uses port 465 by default as documented.  Patch
  by Kasun Herath.

Giampaolo Rodola's avatar
Giampaolo Rodola committed
1603
- Issue #12002: ftplib's abort() method raises TypeError.
1604

Ezio Melotti's avatar
Ezio Melotti committed
1605
- Issue #11916: Add a number of MacOSX specific definitions to the errno module.
1606 1607
  Patch by Pierre Carrier.

1608
- Issue #11999: fixed sporadic sync failure mailbox.Maildir due to its trying to
1609 1610 1611
  detect mtime changes by comparing to the system clock instead of to the
  previous value of the mtime.

1612 1613
- Issue #11072: added MLSD command (RFC-3659) support to ftplib.

1614 1615 1616 1617
- Issue #8808: The IMAP4_SSL constructor now allows passing an SSLContext
  parameter to control parameters of the secure channel.  Patch by Sijin
  Joseph.

1618 1619 1620
- ntpath.samefile failed to notice that "a.txt" and "A.TXT" refer to the same
  file on Windows XP. As noticed in issue #10684.

1621 1622 1623 1624
- Issue #12000: When a SSL certificate has a subjectAltName without any
  dNSName entry, ssl.match_hostname() should use the subject's commonName.
  Patch by Nicolas Bareil.

1625 1626 1627 1628
- Issue #10775: assertRaises, assertRaisesRegex, assertWarns, and
  assertWarnsRegex now accept a keyword argument 'msg' when used as context
  managers.  Initial patch by Winston Ewert.

Ronald Oussoren's avatar
Ronald Oussoren committed
1629 1630 1631 1632
- Issue #10684: shutil.move used to delete a folder on case insensitive
  filesystems when the source and destination name where the same except
  for the case.

1633 1634 1635 1636
- Issue #11647: objects created using contextlib.contextmanager now support
  more than one call to the function when used as a decorator. Initial patch
  by Ysj Ray.

1637 1638 1639
- Issue #11930: Removed deprecated time.accept2dyear variable.
  Removed year >= 1000 restriction from datetime.strftime.

1640 1641
- logging: don't define QueueListener if Python has no thread support.

1642 1643
- functools.cmp_to_key() now works with collections.Hashable().

1644 1645 1646
- Issue #11277: mmap.mmap() calls fcntl(fd, F_FULLFSYNC) on Mac OS X to get
  around a mmap bug with sparse files. Patch written by Steffen Daode Nurpmeso.

1647 1648 1649
- Issue #8407: Add signal.pthread_sigmask() function to fetch and/or change the
  signal mask of the calling thread.

1650 1651 1652 1653 1654
- Issue #11858: configparser.ExtendedInterpolation expected lower-case section
  names.

- Issue #11324: ConfigParser(interpolation=None) now works correctly.

1655 1656 1657
- Issue #11811: ssl.get_server_certificate() is now IPv6-compatible.  Patch
  by Charles-François Natali.

1658 1659 1660
- Issue #11763: don't use difflib in TestCase.assertMultiLineEqual if the
  strings are too long.

1661 1662
- Issue #11236: getpass.getpass responds to ctrl-c or ctrl-z on terminal.

1663 1664
- Issue #11856: Speed up parsing of JSON numbers.

1665
- Issue #11005: threading.RLock()._release_save() raises a RuntimeError if the
1666 1667
  lock was not acquired.

1668 1669 1670
- Issue #11258: Speed up ctypes.util.find_library() under Linux by a factor
  of 5 to 10.  Initial patch by Jonas H.

1671 1672 1673
- Issue #11382: Trivial system calls, such as dup() or pipe(), needn't
  release the GIL.  Patch by Charles-François Natali.

1674 1675 1676
- Issue #11223: Add threading._info() function providing informations about
  the thread implementation.

1677 1678 1679
- Issue #11731: simplify/enhance email parser/generator API by introducing
  policy objects.

1680 1681 1682 1683
- Issue #11768: The signal handler of the signal module only calls
  Py_AddPendingCall() for the first signal to fix a deadlock on reentrant or
  parallel calls. PyErr_SetInterrupt() writes also into the wake up file.

1684 1685
- Issue #11492: fix several issues with header folding in the email package.

1686 1687
- Issue #11852: Add missing imports and update tests.

1688 1689 1690
- Issue #11875: collections.OrderedDict's __reduce__ was temporarily
  mutating the object instead of just working on a copy.

1691
- Issue #11467: Fix urlparse behavior when handling urls which contains scheme
1692 1693
  specific part only digits. Patch by Santoso Wijaya.

1694 1695
- collections.Counter().copy() now works correctly for subclasses.

1696 1697 1698
- Issue #11474: Fix the bug with url2pathname() handling of '/C|/' on Windows.
  Patch by Santoso Wijaya.

1699 1700
- Issue #11684: complete email.parser bytes API by adding BytesHeaderParser.

1701 1702
- The bz2 module now handles 4GiB+ input buffers correctly.

Ezio Melotti's avatar
Ezio Melotti committed
1703 1704
- Issue #9233: Fix json.loads('{}') to return a dict (instead of a list), when
  _json is not available.
1705

Ezio Melotti's avatar
Ezio Melotti committed
1706
- Issue #11830: Remove unnecessary introspection code in the decimal module.
1707 1708

- Issue #11703: urllib2.geturl() does not return correct url when the original
1709
  url contains #fragment.
1710

1711 1712 1713
- Issue #10019: Fixed regression in json module where an indent of 0 stopped
  adding newlines and acted instead like 'None'.

1714 1715 1716
- Issue #11186: pydoc ignores a module if its name contains a surrogate
  character in the index of modules.

1717 1718 1719
- Issue #11815: Use a light-weight SimpleQueue for the result queue in
  concurrent.futures.ProcessPoolExecutor.

brian.curtin's avatar
brian.curtin committed
1720 1721 1722
- Issue #5162: Treat services like frozen executables to allow child spawning
  from multiprocessing.forking on Windows.

1723 1724 1725 1726
- logging.basicConfig now supports an optional 'handlers' argument taking an
  iterable of handlers to be added to the root logger. Additional parameter
  checks were also added to basicConfig.

1727 1728
- Issue #11814: Fix likely typo in multiprocessing.Pool._terminate().

1729 1730 1731
- Issue #11747: Fix range formatting in difflib.context_diff() and
  difflib.unified_diff().

1732 1733 1734 1735
- Issue #8428: Fix a race condition in multiprocessing.Pool when terminating
  worker processes: new processes would be spawned while the pool is being
  shut down.  Patch by Charles-François Natali.

1736 1737
- Issue #2650: re.escape() no longer escapes the '_'.

1738 1739 1740 1741
- Issue #11757: select.select() now raises ValueError when a negative timeout
  is passed (previously, a select.error with EINVAL would be raised).  Patch
  by Charles-François Natali.

1742 1743
- Issue #7311: fix html.parser to accept non-ASCII attribute values.

Georg Brandl's avatar
Georg Brandl committed
1744
- Issue #11605: email.parser.BytesFeedParser was incorrectly converting
Éric Araujo's avatar
Éric Araujo committed
1745
  multipart subparts with an 8-bit CTE into unicode instead of preserving the
Georg Brandl's avatar
Georg Brandl committed
1746
  bytes.
1747

Éric Araujo's avatar
Éric Araujo committed
1748 1749
- Issue #1690608: email.util.formataddr is now RFC 2047 aware:  it now has a
  charset parameter that defaults to utf-8 and is used as the charset for RFC
1750 1751
  2047 encoding when the realname contains non-ASCII characters.

1752 1753
- Issue #10963: Ensure that subprocess.communicate() never raises EPIPE.

1754 1755 1756
- Issue #10791: Implement missing method GzipFile.read1(), allowing GzipFile
  to be wrapped in a TextIOWrapper.  Patch by Nadeem Vawda.

1757 1758 1759
- Issue #11707: Added a fast C version of functools.cmp_to_key().
  Patch by Filip Gruszczyński.

1760 1761 1762
- Issue #11688: Add sqlite3.Connection.set_trace_callback().  Patch by
  Torsten Landschoff.

1763 1764 1765
- Issue #11746: Fix SSLContext.load_cert_chain() to accept elliptic curve
  private keys.

1766 1767 1768 1769
- Issue #5863: Rewrite BZ2File in pure Python, and allow it to accept
  file-like objects using a new ``fileobj`` constructor argument.  Patch by
  Nadeem Vawda.

1770 1771
- unittest.TestCase.assertSameElements has been removed.

1772 1773 1774
- sys.getfilesystemencoding() raises a RuntimeError if initfsencoding() was not
  called yet: detect bootstrap (startup) issues earlier.

1775 1776
- Issue #11393: Add the new faulthandler module.

1777 1778
- Issue #11618: Fix the timeout logic in threading.Lock.acquire() under Windows.

1779 1780 1781
- Removed the 'strict' argument to email.parser.Parser, which has been
  deprecated since Python 2.4.

1782 1783 1784
- Issue #11256: Fix inspect.getcallargs on functions that take only keyword
  arguments.

1785 1786
- Issue #11696: Fix ID generation in msilib.

1787 1788 1789
- itertools.accumulate now supports an optional *func* argument for
  a user-supplied binary function.

1790 1791
- Issue #11692: Remove unnecessary demo functions in subprocess module.

1792 1793 1794
- Issue #9696: Fix exception incorrectly raised by xdrlib.Packer.pack_int when
  trying to pack a negative (in-range) integer.

1795 1796 1797 1798
- Issue #11675: multiprocessing.[Raw]Array objects created from an integer size
  are now zeroed on creation.  This matches the behaviour specified by the
  documentation.

Martin v. Löwis's avatar
Martin v. Löwis committed
1799
- Issue #7639: Fix short file name generation in bdist_msi
1800

1801 1802 1803
- Issue #11659: Fix ResourceWarning in test_subprocess introduced by #11459.
  Patch by Ben Hayden.

1804 1805 1806
- Issue #11635: Don't use polling in worker threads and processes launched by
  concurrent.futures.

1807 1808 1809 1810
- Issue #6811: Allow importlib to change a code object's co_filename attribute
  to match the path to where the source code currently is, not where the code
  object originally came from.

1811 1812
- Issue #8754: Have importlib use the repr of a module name in error messages.

1813 1814 1815
- Issue #11591: Prevent "import site" from modifying sys.path when python
  was started with -S.

1816 1817 1818 1819 1820
- collections.namedtuple() now adds a _source attribute to the generated
  class.  This make the source more accessible than the outdated
  "verbose" option which prints to stdout but doesn't make the source
  string available.

1821 1822 1823
- Issue #11371: Mark getopt error messages as localizable.  Patch by Filip
  Gruszczyński.

1824 1825
- Issue #11333: Add __slots__ to collections ABCs.

1826
- Issue #11628: cmp_to_key generated class should use __slots__.
1827

1828 1829 1830
- Issue #11666: let help() display named tuple attributes and methods
  that start with a leading underscore.

Guido van Rossum's avatar
Guido van Rossum committed
1831 1832 1833
- Issue #11662: Make urllib and urllib2 ignore redirections if the
  scheme is not HTTP, HTTPS or FTP (CVE-2011-1521).

1834 1835 1836
- Issue #5537: Fix time2isoz() and time2netscape() functions of
  httplib.cookiejar for expiration year greater than 2038 on 32-bit systems.

1837 1838
- Issue #4391: Use proper gettext plural forms in optparse.

1839 1840
- Issue #11127: Raise a TypeError when trying to pickle a socket object.

Senthil Kumaran's avatar
Senthil Kumaran committed
1841 1842 1843 1844
- Issue #11563: Connection:close header is sent by requests using URLOpener
  class which helps in closing of sockets after connection is over. Patch
  contributions by Jeff McNeil and Nadeem Vawda.

1845 1846 1847
- Issue #11459: A ``bufsize`` value of 0 in subprocess.Popen() really creates
  unbuffered pipes, such that select() works properly on them.

1848 1849
- Issue #5421: Fix misleading error message when one of socket.sendto()'s
  arguments has the wrong type.  Patch by Nikita Vetoshkin.
1850

1851
- Issue #10812: Add some extra posix functions to the os module.
1852 1853 1854 1855

- Issue #10979: unittest stdout buffering now works with class and module
  setup and teardown.

1856 1857
- Issue #11577: fix ResourceWarning triggered by improved binhex test coverage

1858 1859 1860
- Issue #11243: fix the parameter querying methods of Message to work if
  the headers contain un-encoded non-ASCII data.

1861 1862 1863
- Issue #11401: fix handling of headers with no value; this fixes a regression
  relative to Python2 and the result is now the same as it was in Python2.

1864 1865 1866 1867
- Issue #9298: base64 bodies weren't being folded to line lengths less than 78,
  which was a regression relative to Python2.  Unlike Python2, the last line
  of the folded body now ends with a carriage return.

Nick Coghlan's avatar
Nick Coghlan committed
1868
- Issue #11560: shutil.unpack_archive now correctly handles the format
Nick Coghlan's avatar
Nick Coghlan committed
1869 1870
  parameter. Patch by Evan Dandrea.

1871 1872
- Issue #5870: Add `subprocess.DEVNULL` constant.

1873
- Issue #11133: fix two cases where inspect.getattr_static can trigger code
1874
  execution. Patch by Andreas Stührk.
1875

1876 1877 1878 1879
- Issue #11569: use absolute path to the sysctl command in multiprocessing to
  ensure that it will be found regardless of the shell PATH. This ensures
  that multiprocessing.cpu_count works on default installs of MacOSX.

1880 1881 1882 1883
- Issue #11501: disutils.archive_utils.make_zipfile no longer fails if zlib is
  not installed. Instead, the zipfile.ZIP_STORED compression is used to create
  the ZipFile. Patch by Natalia B. Bidart.

1884 1885 1886
- Issue #11289: `smtp.SMTP` class becomes a context manager so it can be used
  in a `with` statement.  Contributed by Giampaolo Rodola.

1887 1888 1889
- Issue #11554: Fixed support for Japanese codecs; previously the body output
  encoding was not done if euc-jp or shift-jis was specified as the charset.

briancurtin's avatar
briancurtin committed
1890 1891 1892
- Issue #11509: Significantly increase test coverage of fileinput.
  Patch by Denver Coneybeare at PyCon 2011 Sprints.

1893 1894 1895
- Issue #11407: `TestCase.run` returns the result object used or created.
  Contributed by Janathan Hartley.

Antoine Pitrou's avatar
Antoine Pitrou committed
1896
- Issue #11500: Fixed a bug in the os x proxy bypass code for fully qualified
Antoine Pitrou's avatar
Antoine Pitrou committed
1897
  IP addresses in the proxy exception list.
1898

1899 1900 1901 1902
- Issue #11491: dbm.error is no longer raised when dbm.open is called with
  the "n" as the flag argument and the file exists. The behavior matches
  the documentation and general logic.

Éric Araujo's avatar
Éric Araujo committed
1903
- Issue #1162477: Postel Principle adjustment to email date parsing: handle the
1904 1905
  fact that some non-compliant MUAs use '.' instead of ':' in time specs.

1906 1907 1908
- Issue #11131: Fix sign of zero in decimal.Decimal plus and minus
  operations when the rounding mode is ROUND_FLOOR.

1909 1910
- Issue #9935: Speed up pickling of instances of user-defined classes.

1911 1912 1913
- Issue #5622: Fix curses.wrapper to raise correct exception if curses
  initialization fails.

1914 1915 1916
- Issue #11408: In threading.Lock.acquire(), only call gettimeofday() when
  really necessary.  Patch by Charles-François Natali.

1917 1918 1919 1920
- Issue #11391: Writing to a mmap object created with
  ``mmap.PROT_READ|mmap.PROT_EXEC`` would segfault instead of raising a
  TypeError.  Patch by Charles-François Natali.

1921 1922
- Issue #9795: add context manager protocol support for nntplib.NNTP class.

1923 1924 1925 1926
- Issue #11306: mailbox in certain cases adapts to an inability to open
  certain files in read-write mode.  Previously it detected this by
  checking for EACCES, now it also checks for EROFS.

1927 1928 1929
- Issue #11265: asyncore now correctly handles EPIPE, EBADF and EAGAIN errors
  on accept(), send() and recv().

1930 1931
- Issue #11377: Deprecate platform.popen() and reimplement it with os.popen().

1932 1933
- Issue #8513: On UNIX, subprocess supports bytes command string.

1934 1935
- Issue #10866: Add socket.sethostname().  Initial patch by Ross Lagerwall.

1936 1937
- Issue #11140: Lock.release() now raises a RuntimeError when attempting
  to release an unacquired lock, as claimed in the threading documentation.
Antoine Pitrou's avatar
Antoine Pitrou committed
1938
  The _thread.error exception is now an alias of RuntimeError.  Patch by
1939
  Filip Gruszczyński.  Patch for _dummy_thread by Aymeric Augustin.
1940

1941
- Issue #8594: ftplib now provides a source_address parameter to specify which
1942 1943
  (address, port) to bind to before connecting.

1944 1945 1946
- Issue #11326: Add the missing connect_ex() implementation for SSL sockets,
  and make it work for non-blocking connects.

1947 1948
- Issue #11297: Add collections.ChainMap().

1949
- Issue #10755: Add the posix.flistdir() function.  Patch by Ross Lagerwall.
1950

1951 1952 1953
- Issue #4761: Add the *at() family of functions (openat(), etc.) to the posix
  module.  Patch by Ross Lagerwall.

1954 1955 1956
- Issue #7322: Trying to read from a socket's file-like object after a timeout
  occurred now raises an error instead of silently losing data.

1957
- Issue #11291: poplib.POP no longer suppresses errors on quit().
1958

1959
- Issue #11177: asyncore's create_socket() arguments can now be omitted.
1960

1961 1962 1963 1964 1965
- Issue #6064: Add a ``daemon`` keyword argument to the threading.Thread
  and multiprocessing.Process constructors in order to override the
  default behaviour of inheriting the daemonic property from the current
  thread/process.

1966 1967 1968
- Issue #10956: Buffered I/O classes retry reading or writing after a signal
  has arrived and the handler returned successfully.

1969 1970
- Issue #10784: New os.getpriority() and os.setpriority() functions.

1971 1972 1973 1974
- Issue #11114: Fix catastrophic performance of tell() on text files (up
  to 1000x faster in some cases).  It is still one to two order of magnitudes
  slower than binary tell().

1975
- Issue #10882: Add os.sendfile function.
1976

1977 1978 1979
- Issue #10868: Allow usage of the register method of an ABC as a class
  decorator.

1980 1981 1982 1983
- Issue #11224: Fixed a regression in tarfile that affected the file-like
  objects returned by TarFile.extractfile() regarding performance, memory
  consumption and failures with the stream interface.

1984 1985 1986 1987
- Issue #10924: Adding salt and Modular Crypt Format to crypt library.
  Moved old C wrapper to _crypt, and added a Python wrapper with
  enhanced salt generation and simpler API for password generation.

1988 1989
- Issue #11074: Make 'tokenize' so it can be reloaded.

1990 1991 1992 1993 1994
- Issue #11085: Moved collections abstract base classes into a separate
  module called collections.abc, following the pattern used by importlib.abc.
  For backwards compatibility, the names are imported into the collections
  module.

1995 1996 1997 1998
- Issue #4681: Allow mmap() to work on file sizes and offsets larger than
  4GB, even on 32-bit builds.  Initial patch by Ross Lagerwall, adapted for
  32-bit Windows.

1999 2000 2001
- Issue #11169: compileall module uses repr() to format filenames and paths to
  escape surrogate characters and show spaces.

2002
- Issue #11089: Fix performance issue limiting the use of ConfigParser()
2003
  with large config files.
2004

2005 2006 2007
- Issue #10276: Fix the results of zlib.crc32() and zlib.adler32() on buffers
  larger than 4GB.  Patch by Nadeem Vawda.

2008 2009
- Issue #11388: Added a clear() method to MutableSequence

2010 2011 2012
- Issue #11174: Add argparse.MetavarTypeHelpFormatter, which uses type names
  for the names of optional and positional arguments in help messages.

2013 2014
- Issue #9348: Raise an early error if argparse nargs and metavar don't match.

2015 2016
- Issue #8982: Improve the documentation for the argparse Namespace object.

2017 2018 2019
- Issue #9343: Document that argparse parent parsers must be configured before
  their children.

2020 2021
- Issue #9026: Fix order of argparse sub-commands in help messages.

2022 2023
- Issue #9347: Fix formatting for tuples in argparse type= error messages.

2024 2025 2026
- Issue #12191: Added shutil.chown() to change user and/or group owner of a
  given path also specifying their names.

2027 2028 2029
- Issue #13988: The _elementtree accelerator is used whenever available.
  Now xml.etree.cElementTree becomes a deprecated alias to ElementTree.

2030 2031 2032
Build
-----

Martin v. Löwis's avatar
Martin v. Löwis committed
2033 2034
- Issue #6807: Run msisupport.mak earlier.

Martin v. Löwis's avatar
Martin v. Löwis committed
2035 2036
- Issue #10580: Minor grammar change in Windows installer.

2037 2038
- Issue #13326: Clean __pycache__ directories correctly on OpenBSD.

2039 2040
- PEP 393: the configure option --with-wide-unicode is removed.

2041 2042 2043
- Issue #12852: Set _XOPEN_SOURCE to 700, instead of 600, to get POSIX 2008
  functions on OpenBSD (e.g. fdopendir).

2044 2045 2046 2047
- Issue #11863: Remove support for legacy systems deprecated in Python 3.2
  (following PEP 11).  These systems are systems using Mach C Threads,
  SunOS lightweight processes, GNU pth threads and IRIX threads.

2048 2049 2050 2051 2052
- Issue #8746: Correct faulty configure checks so that os.chflags() and
  os.lchflags() are once again built on systems that support these
  functions (*BSD and OS X).  Also add new stat file flags for OS X
  (UF_HIDDEN and UF_COMPRESSED).

2053 2054 2055
- Issue #10645: Installing Python does no longer create a
  Python-X.Y.Z-pyX.Y.egg-info file in the lib-dynload directory.

2056 2057 2058
- Do not accidentally include the directory containing sqlite.h twice when
  building sqlite3.

2059 2060 2061 2062
- Issue #11217: For 64-bit/32-bit Mac OS X universal framework builds,
  ensure "make install" creates symlinks in --prefix bin for the "-32"
  files in the framework bin directory like the installer does.

2063
- Issue #11347: Use --no-as-needed when linking libpython3.so.
2064

Thomas Wouters's avatar
Thomas Wouters committed
2065
- Issue #11411: Fix 'make DESTDIR=' with a relative destination.
Georg Brandl's avatar
Georg Brandl committed
2066

2067 2068
- Issue #11268: Prevent Mac OS X Installer failure if Documentation
  package had previously been installed.
2069

2070
- Issue #11495: OSF support is eliminated. It was deprecated in Python 3.2.
2071

2072

2073 2074 2075 2076 2077
IDLE
----

- Issue #11718: IDLE's open module dialog couldn't find the __init__.py
  file in a package.
2078

2079 2080 2081
Tools/Demos
-----------

2082 2083 2084
- Issue #14053: patchcheck.py ("make patchcheck") now works with MQ patches.
  Patch by Francisco Martín Brugué.

2085 2086 2087 2088 2089
- Issue #13930: 2to3 is now able to write its converted output files to another
  directory tree as well as copying unchanged files and altering the file
  suffix.  See its new -o, -W and --add-suffix options.  This makes it more
  useful in many automated code translation workflows.

2090 2091 2092
- Issue #13628: python-gdb.py is now able to retrieve more frames in the Python
  traceback if Python is optimized.

2093 2094 2095
- Issue #11996: libpython (gdb), replace "py-bt" command by "py-bt-full" and
  add a smarter "py-bt" command printing a classic Python traceback.

2096 2097
- Issue #11179: Make ccbench work under Python 3.1 and 2.7 again.

2098 2099
- Issue #10639: reindent.py no longer converts newlines and will raise
  an error if attempting to convert a file with mixed newlines.
2100
  "--newline" option added to specify new line character.
2101

Ezio Melotti's avatar
Ezio Melotti committed
2102 2103
Extension Modules
-----------------
2104

2105 2106 2107
- Issue #13840: The error message produced by ctypes.create_string_buffer
  when given a Unicode string has been fixed.

2108 2109 2110
- Issue #9975: socket: Fix incorrect use of flowinfo and scope_id. Patch by
  Vilmos Nebehaj.

2111 2112
- Issue #7777: socket: Add Reliable Datagram Sockets (PF_RDS) support.

2113 2114 2115
- Issue #13159: FileIO and BZ2Compressor/BZ2Decompressor now use a linear-time
  buffer growth strategy instead of a quadratic-time one.

2116 2117 2118
- Issue #10141: socket: Add SocketCAN (PF_CAN) support. Initial patch by
  Matthias Fuchs, updated by Tiago Gonçalves.

2119 2120 2121 2122
- Issue #13070: Fix a crash when a TextIOWrapper caught in a reference cycle
  would be finalized after the reference to its underlying BufferedRWPair's
  writer got cleared by the GC.

2123 2124
- Issue #12881: ctypes: Fix segfault with large structure field names.

2125 2126 2127
- Issue #13058: ossaudiodev: fix a file descriptor leak on error. Patch by
  Thomas Jarosch.

2128 2129 2130
- Issue #13013: ctypes: Fix a reference leak in PyCArrayType_from_ctype.
  Thanks to Suman Saha for finding the bug and providing a patch.

2131 2132 2133
- Issue #13022: Fix: _multiprocessing.recvfd() doesn't check that
  file descriptor was actually received.

2134 2135 2136
- Issue #1172711: Add 'long long' support to the array module.
  Initial patch by Oren Tirosh and Hirokazu Yamamoto.

2137 2138 2139
- Issue #12483: ctypes: Fix a crash when the destruction of a callback
  object triggers the garbage collector.

Jesus Cea's avatar
NEWS  
Jesus Cea committed
2140 2141 2142
- Issue #12950: Fix passing file descriptors in multiprocessing, under
  OpenIndiana/Illumos.

2143 2144 2145
- Issue #12764: Fix a crash in ctypes when the name of a Structure field is not
  a string.

Amaury Forgeot d'Arc's avatar
Amaury Forgeot d'Arc committed
2146 2147 2148 2149 2150
- Issue #11241: subclasses of ctypes.Array can now be subclassed.

- Issue #9651: Fix a crash when ctypes.create_string_buffer(0) was passed to
  some functions like file.write().

2151 2152 2153 2154
- Issue #10309: Define _GNU_SOURCE so that mremap() gets the proper
  signature.  Without this, architectures where sizeof void* != sizeof int are
  broken.  Patch given by Hallvard B Furuseth.

Ezio Melotti's avatar
Ezio Melotti committed
2155 2156
- Issue #12051: Fix segfault in json.dumps() while encoding highly-nested
  objects using the C accelerations.
2157

Ezio Melotti's avatar
Ezio Melotti committed
2158 2159
- Issue #12017: Fix segfault in json.loads() while decoding highly-nested
  objects using the C accelerations.
2160

Benjamin Peterson's avatar
Benjamin Peterson committed
2161 2162
- Issue #1838: Prevent segfault in ctypes, when _as_parameter_ on a class is set
  to an instance of the class.
2163

2164
Tests
2165
-----
2166

Petri Lehtinen's avatar
Petri Lehtinen committed
2167 2168
- Issue #11689: Fix a variable scoping error in an sqlite3 test

2169 2170
- Issue #13786: Remove unimplemented 'trace' long option from regrtest.py.

2171 2172 2173
- Issue #13725: Fix regrtest to recognize the documented -d flag.
  Patch by Erno Tukia.

2174 2175 2176
- Issue #13304: Skip test case if user site-packages disabled (-s or
  PYTHONNOUSERSITE).  (Patch by Carl Meyer)

2177 2178 2179
- Issue #5661: Add a test for ECONNRESET/EPIPE handling to test_asyncore. Patch
  by Xavier de Gaye.

2180 2181
- Issue #13218: Fix test_ssl failures on Debian/Ubuntu.

2182 2183 2184
- Re-enable lib2to3's test_parser.py tests, though with an expected failure
  (see issue 13125).

2185 2186
- Issue #12656: Add tests for IPv6 and Unix sockets to test_asyncore.

2187 2188
- Issue #6484: Add unit tests for mailcap module (patch by Gregory Nofi)

2189 2190 2191 2192 2193
- Issue #11651: Improve the Makefile test targets to run more of the test suite
  more quickly. The --multiprocess option is now enabled by default, reducing
  the amount of time needed to run the tests. "make test" and "make quicktest"
  now include some resource-intensive tests, but no longer run the test suite
  twice to check for bugs in .pyc generation. Tools/scripts/run_test.py provides
Éric Araujo's avatar
Éric Araujo committed
2194
  an easy platform-independent way to run test suite with sensible defaults.
2195

2196 2197 2198
- Issue #12331: The test suite for the packaging module can now run from an
  installed Python.

2199 2200 2201
- Issue #12331: The test suite for lib2to3 can now run from an installed
  Python.

2202 2203 2204 2205 2206
- Issue #12626: In regrtest, allow to filter tests using a glob filter
  with the ``-m`` (or ``--match``) option.  This works with all test cases
  using the unittest module.  This is useful with long test suites
  such as test_io or test_subprocess.

2207 2208 2209 2210 2211
- Issue #12624: It is now possible to fail after the first failure when
  running in verbose mode (``-v`` or ``-W``), by using the ``--failfast``
  (or ``-G``) option to regrtest.  This is useful with long test suites
  such as test_io or test_subprocess.

2212 2213 2214
- Issue #12587: Correct faulty test file and reference in test_tokenize.
  (Patch by Robert Xiao)

2215 2216
- Issue #12573: Add resource checks for dangling Thread and Process objects.

2217 2218 2219
- Issue #12549: Correct test_platform to not fail when OS X returns 'x86_64'
  as the processor type on some Mac systems.

2220 2221 2222
- Skip network tests when getaddrinfo() returns EAI_AGAIN, meaning a temporary
  failure in name resolution.

2223 2224 2225
- Issue #11812: Solve transient socket failure to connect to 'localhost'
  in test_telnetlib.py.

2226 2227
- Solved a potential deadlock in test_telnetlib.py. Related to issue #11812.

2228 2229 2230 2231
- Avoid failing in test_robotparser when mueblesmoraleda.com is flaky and
  an overzealous DNS service (e.g. OpenDNS) redirects to a placeholder
  Web site.

2232 2233 2234 2235
- Avoid failing in test_urllibnet.test_bad_address when some overzealous
  DNS service (e.g. OpenDNS) resolves a non-existent domain name.  The test
  is now skipped instead.

2236 2237 2238 2239
- Issue #12440: When testing whether some bits in SSLContext.options can be
  reset, check the version of the OpenSSL headers Python was compiled against,
  rather than the runtime version of the OpenSSL library.

2240 2241
- Issue #11512: Add a test suite for the cgitb module. Patch by Robbie Clemons.

2242 2243 2244 2245
- Issue #12497: Install test/data to prevent failures of the various codecmaps
  tests.

- Issue #12496: Install test/capath directory to prevent test_connect_capath
2246 2247
  testcase failure in test_ssl.

2248 2249 2250 2251
- Issue #12469: Run wakeup and pending signal tests in a subprocess to run the
  test in a fresh process with only one thread and to not change signal
  handling of the parent process.

2252 2253 2254 2255
- Issue #8716: Avoid crashes caused by Aqua Tk on OSX when attempting to run
  test_tk or test_ttk_guionly under a username that is not currently logged
  in to the console windowserver (as may be the case under buildbot or ssh).

2256 2257
- Issue #12407: Explicitly skip test_capi.EmbeddingTest under Windows.

2258 2259 2260 2261
- Issue #12400: regrtest -W doesn't rerun the tests twice anymore, but captures
  the output and displays it on failure instead. regrtest -v doesn't print the
  error twice anymore if there is only one error.

2262 2263 2264 2265 2266
- Issue #12141: Install copies of template C module file so that
  test_build_ext of test_distutils and test_command_build_ext of
  test_packaging are no longer silently skipped when
  run outside of a build directory.

2267 2268 2269
- Issue #8746: Add additional tests for os.chflags() and os.lchflags().
  Patch by Garrett Cooper.

2270 2271 2272
- Issue #10736: Fix test_ttk test_widgets failures with Cocoa Tk 8.5.9
  2.8 +  on Mac OS X.  (Patch by Ronald Oussoren)

2273 2274 2275
- Issue #12057: Add tests for ISO 2022 codecs (iso2022_jp, iso2022_jp_2,
  iso2022_kr).

2276 2277 2278
- Issue #12096: Fix a race condition in test_threading.test_waitfor(). Patch
  written by Charles-François Natali.

2279 2280 2281
- Issue #11614: import __hello__ prints "Hello World!". Patch written by
  Andreas Stührk.

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2282 2283
- Issue #5723: Improve json tests to be executed with and without accelerations.

2284 2285
- Issue #12041: Make test_wait3 more robust.

2286 2287 2288
- Issue #11873: Change regex in test_compileall to fix occasional failures when
  when the randomly generated temporary path happened to match the regex.

2289 2290 2291
- Issue #11958: Fix FTP tests for IPv6, bind to "::1" instead of "localhost".
  Patch written by Charles-Francois Natali.

2292 2293 2294 2295
- Issue #8407, #11859: Fix tests of test_io using threads and an alarm: use
  pthread_sigmask() to ensure that the SIGALRM signal is received by the main
  thread.

2296 2297 2298 2299
- Issue #11811: Factor out detection of IPv6 support on the current host
  and make it available as ``test.support.IPV6_ENABLED``.  Patch by
  Charles-François Natali.

2300 2301
- Issue #10914: Add a minimal embedding test to test_capi.

2302 2303 2304 2305 2306 2307
- Issue #11223: Skip test_lock_acquire_interruption() and
  test_rlock_acquire_interruption() of test_threadsignals if a thread lock is
  implemented using a POSIX mutex and a POSIX condition variable. A POSIX
  condition variable cannot be interrupted by a signal (e.g. on Linux, the
  futex system call is restarted).

2308 2309
- Issue #11790: Fix sporadic failures in test_multiprocessing.WithProcessesTestCondition.

2310 2311
- Fix possible "file already exists" error when running the tests in parallel.

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2312 2313
- Issue #11719: Fix message about unexpected test_msilib skip on non-Windows
  platforms. Patch by Nadeem Vawda.
2314

2315 2316
- Issue #11727: Add a --timeout option to regrtest: if a test takes more than
  TIMEOUT seconds, dumps the traceback of all threads and exits.
2317

2318 2319
- Issue #11653: fix -W with -j in regrtest.

2320 2321 2322 2323 2324
- The email test suite now lives in the Lib/test/test_email package.  The test
  harness code has also been modernized to allow use of new unittest features.

- regrtest now discovers test packages as well as test modules.

2325
- Issue #11577: improve test coverage of binhex.py. Patch by Arkady Koplyarov.
2326

2327 2328 2329
- New test_crashers added to exercise the scripts in the Lib/test/crashers
  directory and confirm they fail as expected

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2330
- Issue #11578: added test for the timeit module.  Patch by Michael Henry.
2331

2332 2333
- Issue #11503: improve test coverage of posixpath.py. Patch by Evan Dandrea.

2334 2335
- Issue #11505: improves test coverage of string.py, increases granularity of
  string.Formatter tests. Initial patch by Alicia Arlen.
2336

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2337 2338 2339
- Issue #11548: Improve test coverage of the shutil module. Patch by
  Evan Dandrea.

2340 2341
- Issue #11554: Reactivated test_email_codecs.

2342 2343
- Issue #11505: improves test coverage of string.py. Patch by Alicia
  Arlen
2344

2345 2346 2347
- Issue #11490: test_subprocess:test_leaking_fds_on_error no longer gives a
  false positive if the last directory in the path is inaccessible.

2348 2349 2350
- Issue #11223: Fix test_threadsignals to fail, not hang, when the
  non-semaphore implementation of locks is used under POSIX.

2351 2352 2353
- Issue #10911: Add tests on CGI with non-ASCII characters. Patch written by
  Pierre Quentel.

2354 2355 2356
- Issue #9931: Fix hangs in GUI tests under Windows in certain conditions.
  Patch by Hirokazu Yamamoto.

2357 2358
- Issue #10512: Properly close sockets under test.test_cgi.

2359 2360
- Issue #10992: Make tests pass under coverage.

2361 2362 2363
- Issue #10826: Prevent sporadic failure in test_subprocess on Solaris due
  to open door files.

2364 2365
- Issue #10990: Prevent tests from clobbering a set trace function.

2366 2367 2368
C-API
-----

2369 2370 2371 2372
- Add PyObject_GenericGetDict and PyObject_GeneriSetDict. They are generic
  implementations for the getter and setter of a ``__dict__`` descriptor of C
  types.

2373 2374 2375 2376
- Issue #13727: Add 3 macros to access PyDateTime_Delta members:
  PyDateTime_DELTA_GET_DAYS, PyDateTime_DELTA_GET_SECONDS,
  PyDateTime_DELTA_GET_MICROSECONDS.

2377 2378 2379 2380
- Issue #10542: Add 4 macros to work with surrogates: Py_UNICODE_IS_SURROGATE,
  Py_UNICODE_IS_HIGH_SURROGATE, Py_UNICODE_IS_LOW_SURROGATE,
  Py_UNICODE_JOIN_SURROGATES.

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2381 2382
- Issue #12724: Add Py_RETURN_NOTIMPLEMENTED macro for returning NotImplemented.

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2383 2384
- PY_PATCHLEVEL_REVISION has been removed, since it's meaningless with
  Mercurial.
2385

2386
- Issue #12173: The first argument of PyImport_ImportModuleLevel is now `const
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  char *` instead of `char *`.
2388

2389 2390
- Issue #12380: PyArg_ParseTuple now accepts a bytearray for the 'c' format.

2391 2392 2393
Documentation
-------------

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2394 2395
- Issues #13491 and #13995: Fix many errors in sqlite3 documentation.
  Initial patch for #13491 by Johannes Vogel.
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2396

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Petri Lehtinen committed
2397 2398
- Issue #13402: Document absoluteness of sys.executable.

2399 2400
- Issue #13883: PYTHONCASEOK also works on OS X.

2401 2402 2403
- Issue #12949: Document the kwonlyargcount argument for the PyCode_New
  C API function.

2404 2405 2406
- Issue #13513: Fix io.IOBase documentation to correctly link to the
  io.IOBase.readline method instead of the readline module.

2407 2408 2409
- Issue #13237: Reorganise subprocess documentation to emphasise convenience
  functions and the most commonly needed arguments to Popen.

Florent Xicluna's avatar
Florent Xicluna committed
2410 2411
- Issue #13141: Demonstrate recommended style for socketserver examples.

2412 2413
- Issue #11818: Fix tempfile examples for Python 3.

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2414

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2415 2416 2417 2418 2419 2420 2421 2422
What's New in Python 3.2?
=========================

*Release date: 20-Feb-2011*

Core and Builtins
-----------------

2423 2424
- Issue #11249: Fix potential crashes when using the limited API.

2425 2426 2427
Build
-----

2428 2429
- Issue #11222: Fix non-framework shared library build on Mac OS X.

2430 2431
- Issue #11184: Fix large-file support on AIX.

2432 2433
- Issue #941346: Fix broken shared library build on AIX.

2434 2435 2436 2437 2438
Documentation
-------------

- Issue #10709: Add updated AIX notes in Misc/README.AIX.

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2439

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2440 2441
What's New in Python 3.2 Release Candidate 3?
=============================================
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2442

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2443
*Release date: 13-Feb-2011*
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Core and Builtins
-----------------

2448 2449
- Issue #11134: Add missing fields to typeslots.h.

2450 2451
- Issue #11135: Remove redundant doc field from PyType_Spec.

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Georg Brandl committed
2452 2453
- Issue #11067: Add PyType_GetFlags, to support PyUnicode_Check in the limited
  ABI.
2454

2455 2456
- Issue #11118: Fix bogus export of None in python3.dll.

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2457 2458 2459
Library
-------

Georg Brandl's avatar
Georg Brandl committed
2460 2461
- Issue #11116: any error during addition of a message to a mailbox now causes a
  rollback, instead of leaving the mailbox partially modified.
2462

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Georg Brandl committed
2463 2464
- Issue #11132: Fix passing of "optimize" parameter when recursing in
  compileall.compile_dir().
2465

2466 2467
- Issue #11110: Fix a potential decref of a NULL in sqlite3.

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2468 2469
- Issue #8275: Fix passing of callback arguments with ctypes under Win64.  Patch
  by Stan Mihai.
2470

2471 2472 2473
Build
-----

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2474 2475 2476 2477
- Issue #11079: The /Applications/Python x.x folder created by the Mac OS X
  installers now includes a link to the installed documentation and no longer
  includes an Extras directory.  The Tools directory is now installed in the
  framework under share/doc.
2478

2479 2480
- Issue #11121: Fix building with --enable-shared.

2481 2482 2483
Tests
-----

Georg Brandl's avatar
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2484 2485
- Issue #10971: test_zipimport_support is once again compatible with the refleak
  hunter feature of test.regrtest.
2486

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2487

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2488 2489 2490
What's New in Python 3.2 Release Candidate 2?
=============================================

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*Release date: 30-Jan-2011*
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Core and Builtins
-----------------

2496 2497 2498
- Issue #10451: memoryview objects could allow to mutate a readable buffer.
  Initial patch by Ross Lagerwall.

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Library
-------

2502 2503 2504 2505 2506 2507
- Issue #9124: mailbox now accepts binary input and reads and writes mailbox
  files in binary mode, using the email package's binary support to parse
  arbitrary email messages.  StringIO and text file input is deprecated,
  and string input fails early if non-ASCII characters are used, where
  previously it would fail when the email was processed in a later step.

2508 2509 2510 2511
- Issue #10845: Mitigate the incompatibility between the multiprocessing
  module on Windows and the use of package, zipfile or directory execution
  by special casing main modules that actually *are* called __main__.py.

2512 2513
- Issue #11045: Protect logging call against None argument.

2514 2515 2516
- Issue #11052: Correct IDLE menu accelerators on Mac OS X for Save
  commands.

2517 2518 2519 2520
- Issue #11053: Fix IDLE "Syntax Error" windows to behave as in 2.x,
  preventing a confusing hung appearance on OS X with the windows
  obscured.

2521 2522 2523 2524
- Issue #10940: Workaround an IDLE hang on Mac OS X 10.6 when using the
  menu accelerators for Open Module, Go to Line, and New Indent Width.
  The accelerators still work but no longer appear in the menu items.

2525 2526
- Issue #10989: Fix a crash on SSLContext.load_verify_locations(None, True).

2527 2528 2529
- Issue #11020: Command-line pyclbr was broken because of missing 2-to-3
  conversion.

2530 2531 2532
- Issue #11019: Fixed BytesGenerator so that it correctly handles a Message
  with a None body.

2533 2534 2535 2536
- Issue #11014: Make 'filter' argument in tarfile.Tarfile.add() into a
  keyword-only argument.  The preceding positional argument was deprecated,
  so it made no sense to add filter as a positional argument.

2537 2538
- Issue #11004: Repaired edge case in deque.count().

2539 2540 2541
- Issue #10974: IDLE no longer crashes if its recent files list includes files
  with non-ASCII characters in their path names.

2542 2543 2544
- Have hashlib.algorithms_available and hashlib.algorithms_guaranteed both
  return sets instead of one returning a tuple and the other a frozenset.

2545 2546
- Issue #10987: Fix the recursion limit handling in the _pickle module.

2547 2548
- Issue #10983: Fix several bugs making tunnel requests in http.client.

2549
- Issue #10955: zipimport uses ASCII encoding instead of cp437 to decode
2550 2551
  filenames, at bootstrap, if the codec registry is not ready yet. It is still
  possible to have non-ASCII filenames using the Unicode flag (UTF-8 encoding)
2552
  for all file entries in the ZIP file.
2553

2554 2555
- Issue #10949: Improved robustness of rotating file handlers.

2556 2557 2558
- Issue #10955: Fix a potential crash when trying to mmap() a file past its
  length.  Initial patch by Ross Lagerwall.

2559 2560 2561
- Issue #10898: Allow compiling the posix module when the C library defines
  a symbol named FSTAT.

2562 2563 2564 2565
- Issue #10980: the HTTP server now encodes headers with iso-8859-1 (latin1)
  encoding.  This is the preferred encoding of PEP 3333 and the base encoding
  of HTTP 1.1.

2566 2567 2568 2569 2570
- To match the behaviour of HTTP server, the HTTP client library now also
  encodes headers with iso-8859-1 (latin1) encoding.  It was already doing
  that for incoming headers which makes this behaviour now consistent in
  both incoming and outgoing direction.

2571 2572
- Issue #9509: argparse now properly handles IOErrors raised by
  argparse.FileType.
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2573

2574 2575 2576
- Issue #10961: The new pydoc server now better handles exceptions raised
  during request handling.

2577 2578 2579
- Issue #10680: Fix mutually exclusive arguments for argument groups in
  argparse.

2580 2581 2582 2583 2584 2585 2586
Build
-----

- Issue #11054: Allow Mac OS X installer builds to again work on 10.5 with
  the system-provided Python.


2587 2588 2589
What's New in Python 3.2 Release Candidate 1
============================================

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2590 2591
*Release date: 16-Jan-2011*

2592 2593 2594
Core and Builtins
-----------------

2595
- Issue #10889: range indexing and slicing now works correctly on ranges with
2596
  a length that exceeds sys.maxsize.
2597

2598 2599 2600
- Issue #10892: Don't segfault when trying to delete __abstractmethods__ from a
  class.

2601
- Issue #8020: Avoid a crash where the small objects allocator would read
2602 2603
  non-Python managed memory while it is being modified by another thread.  Patch
  by Matt Bandy.
2604

2605 2606 2607
- Issue #10841: On Windows, set the binary mode on stdin, stdout, stderr and all
  io.FileIO objects (to not translate newlines, \r\n <=> \n).  The Python parser
  translates newlines (\r\n => \n).
2608

2609 2610
- Remove buffer API from stable ABI for now, see #10181.

2611 2612 2613 2614
- Issue #8651: PyArg_Parse*() functions raise an OverflowError if the file
  doesn't have PY_SSIZE_T_CLEAN define and the size doesn't fit in an int
  (length bigger than 2^31-1 bytes).

2615
- Issue #9015, #9611: FileIO.readinto(), FileIO.write(), os.write() and
2616
  stdprinter.write() clamp the length to INT_MAX on Windows.
2617

2618 2619 2620
- Issue #8278: On Windows and with a NTFS filesystem, os.stat() and os.utime()
  can now handle dates after 2038.

2621 2622 2623 2624
- Issue #10780: PyErr_SetFromWindowsErrWithFilename() and
  PyErr_SetExcFromWindowsErrWithFilename() decode the filename from the
  filesystem encoding instead of UTF-8.

2625 2626 2627
- Issue #10779: PyErr_WarnExplicit() decodes the filename from the filesystem
  encoding instead of UTF-8.

2628 2629
- Add sys.flags attribute for the new -q command-line option.

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Benjamin Peterson committed
2630 2631 2632
- Issue #11506: Trying to assign to a bytes literal should result in a
  SyntaxError.

2633 2634 2635
Library
-------

2636 2637 2638
- Issue #10916: mmap should not segfault when a file is mapped using 0 as length
  and a non-zero offset, and an attempt to read past the end of file is made
  (IndexError is raised instead).  Patch by Ross Lagerwall.
2639

2640 2641 2642
- Issue #10154, #10090: change the normalization of UTF-8 to "UTF-8" instead
  of "UTF8" in the locale module as the latter is not supported MacOSX and OpenBSD.

2643 2644 2645
- Issue #10907: Warn OS X 10.6 IDLE users to use ActiveState Tcl/Tk 8.5, rather
  than the currently problematic Apple-supplied one, when running with the
  64-/32-bit installer variant.
2646

2647 2648
- Issue #4953: cgi.FieldStorage and cgi.parse() parse the request as bytes, not
  as unicode, and accept binary files. Add encoding and errors attributes to
2649 2650
  cgi.FieldStorage. Patch written by Pierre Quentel (with many inputs by Glenn
  Linderman).
2651

2652
- Add encoding and errors arguments to urllib.parse_qs() and urllib.parse_qsl().
2653

2654 2655
- Issue #10899: No function type annotations in the standard library.  Removed
  function type annotations from _pyio.py.
2656

2657 2658
- Issue #10875: Update Regular Expression HOWTO; patch by 'SilentGhost'.

2659 2660 2661
- Issue #10872: The repr() of TextIOWrapper objects now includes the mode
  if available.

2662 2663
- Issue #10869: Fixed bug where ast.increment_lineno modified the root node
  twice.
2664

2665
- Issue #5871: email.header.Header.encode now raises an error if any
2666 2667 2668 2669
  continuation line in the formatted value has no leading white space and looks
  like a header.  Since Generator uses Header to format all headers, this check
  is made for all headers in any serialized message at serialization time.  This
  provides protection against header injection attacks.
2670

2671 2672 2673
- Issue #10859: Make ``contextlib.GeneratorContextManager`` officially
  private by renaming it to ``_GeneratorContextManager``.

2674 2675 2676
- Issue #10042: Fixed the total_ordering decorator to handle cross-type
  comparisons that could lead to infinite recursion.

2677
- Issue #10686: the email package now :rfc:`2047`\ -encodes headers with
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2678
  non-ASCII bytes (parsed by a BytesParser) when doing conversion to 7bit-clean
2679
  presentation, instead of replacing them with ?s.
2680

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2681
- email.header.Header was incorrectly encoding folding whitespace when
2682 2683 2684
  rfc2047-encoding header values with embedded newlines, leaving them without
  folding whitespace.  It now uses the continuation_ws, as it does for
  continuation lines that it creates itself.
2685

2686 2687 2688 2689 2690 2691
- Issue #1777412, #10827: Changed the rules for 2-digit years. The
  time.asctime(), time.ctime() and time.strftime() functions will now format
  any year when ``time.accept2dyear`` is False and will accept years >= 1000
  otherwise. ``time.mktime`` and ``time.strftime`` now accept full range
  supported by the OS. With Visual Studio or on Solaris, the year is limited to
  the range [1; 9999]. Conversion of 2-digit years to 4-digit is deprecated.
2692

2693 2694 2695
- Issue #7858: Raise an error properly when os.utime() fails under Windows
  on an existing file.

2696 2697 2698
- Issue #3839: wsgiref should not override a Content-Length header set by
  the application.  Initial patch by Clovis Fabricio.

2699 2700 2701
- Issue #10492: bdb.Bdb.run() only traces the execution of the code, not the
  compilation (if the input is a string).

2702
- Issue #7995: When calling accept() on a socket with a timeout, the returned
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2703
  socket is now always blocking, regardless of the operating system.
2704

2705 2706
- Issue #10756: atexit normalizes the exception before displaying it. Patch by
  Andreas Stührk.
2707

2708 2709 2710
- Issue #10790: email.header.Header.append's charset logic now works correctly
  for charsets whose output codec is different from its input codec.

2711 2712 2713
- Issue #10819: SocketIO.name property returns -1 when its closed, instead of
  raising a ValueError, to fix repr().

2714 2715 2716 2717
- Issue #8650: zlib.compress() and zlib.decompress() raise an OverflowError if
  the input buffer length doesn't fit into an unsigned int (length bigger than
  2^32-1 bytes).

2718 2719
- Issue #6643: Reinitialize locks held within the threading module after fork to
  avoid a potential rare deadlock or crash on some platforms.
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2720

2721 2722 2723
- Issue #10806, issue #9905: Fix subprocess pipes when some of the standard file
  descriptors (0, 1, 2) are closed in the parent process.  Initial patch by Ross
  Lagerwall.
2724

2725 2726 2727
- `unittest.TestCase` can be instantiated without a method name; for simpler
  exploration from the interactive interpreter.

2728 2729 2730
- Issue #10798: Reject supporting concurrent.futures if the system has too
  few POSIX semaphores.

2731 2732 2733
- Issue #10807: Remove base64, bz2, hex, quopri, rot13, uu and zlib codecs from
  the codec aliases. They are still accessible via codecs.lookup().

2734 2735
- Issue #10801: In zipfile, support different encodings for the header and the
  filenames.
2736

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2737 2738
- Issue #6285: IDLE no longer crashes on missing help file; patch by Scott
  David Daniels.
2739

2740 2741
- Fix collections.OrderedDict.setdefault() so that it works in subclasses that
  define __missing__().
2742

2743 2744 2745
- Issue #10786: unittest.TextTestRunner default stream no longer bound at import
  time. `sys.stderr` now looked up at instantiation time.  Fix contributed by
  Mark Roddy.
2746

2747 2748
- Issue #10753: Characters ';', '=' and ',' in the PATH_INFO environment variable
  won't be quoted when the URI is constructed by the wsgiref.util's request_uri
2749 2750
  method. According to RFC 3986, these characters can be a part of params in
  PATH component of URI and need not be quoted.
2751

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2752
- Issue #10738: Fix webbrowser.Opera.raise_opts.
2753

Georg Brandl's avatar
Georg Brandl committed
2754
- Issue #9824: SimpleCookie now encodes , and ; in values to cater to how
2755 2756
  browsers actually parse cookies.

2757 2758 2759
- Issue #9333: os.symlink now available regardless of user privileges.  The
  function now raises OSError on Windows >=6.0 when the user is unable to create
  symbolic links. XP and 2003 still raise NotImplementedError.
2760

2761
- Issue #10783: struct.pack() no longer implicitly encodes unicode to UTF-8.
2762

2763 2764
- Issue #10730: Add SVG mime types to mimetypes module.

2765 2766
- Issue #10768: Make the Tkinter ScrolledText widget work again.

2767 2768 2769
- Issue #10777: Fix "dictionary changed size during iteration" bug in
  ElementTree register_namespace().

2770 2771 2772 2773
- Issue #10626: test_logging now preserves logger disabled states.

- Issue #10774: test_logging now removes temp files created during tests.

2774 2775 2776 2777
- Issue #5258/#10642: if site.py encounters a .pth file that generates an error,
  it now prints the filename, line number, and traceback to stderr and skips
  the rest of that individual file, instead of stopping processing entirely.

2778 2779 2780
- Issue #10763: subprocess.communicate() closes stdout and stderr if both are
  pipes (bug specific to Windows).

2781 2782 2783
- Issue #1693546: fix email.message RFC 2231 parameter encoding to be in better
  compliance (no "s around encoded values).

2784 2785
- Improved the diff message in the unittest module's assertCountEqual().

2786 2787 2788
- Issue #1155362: email.utils.parsedate_tz now handles a missing space before
  the '-' of a timezone field as well as before a '+'.

2789 2790 2791
- Issue #4871: The zipfile module now gives a more useful error message if
  an attempt is made to use a string to specify the archive password.

2792 2793
- Issue #10750: The ``raw`` attribute of buffered IO objects is now read-only.

Raymond Hettinger's avatar
Typo.  
Raymond Hettinger committed
2794
- Deprecated assertDictContainsSubset() in the unittest module.
2795

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C-API
-----

2799 2800 2801
- PyObject_CallMethod now passes along any underlying AttributeError from
  PyObject_GetAttr, instead of replacing it with something less informative

2802 2803 2804
- Issue #10913: Deprecate misleading functions PyEval_AcquireLock() and
  PyEval_ReleaseLock().  The thread-state aware APIs should be used instead.

2805 2806
- Issue #10333: Remove ancient GC API, which has been deprecated since Python
  2.2.
2807

2808 2809 2810
Build
-----

2811 2812 2813
- Issue #10843: Update third-party library versions used in OS X 32-bit
  installer builds: bzip2 1.0.6, readline 6.1.2, SQLite 3.7.4 (with FTS3/FTS4
  and RTREE enabled), and ncursesw 5.5 (wide-char support enabled).
2814

2815 2816 2817
- Issue #10820: Fix OS X framework installs to support version-specific
  scripts (#10679).

2818 2819 2820
- Issue #7716: Under Solaris, don't assume existence of /usr/xpg4/bin/grep in
  the configure script but use $GREP instead.  Patch by Fabian Groffen.

2821 2822 2823
- Issue #10475: Don't hardcode compilers for LDSHARED/LDCXXSHARED on NetBSD
  and DragonFly BSD.  Patch by Nicolas Joly.

2824 2825 2826
- Issue #10679: The "idle", "pydoc" and "2to3" scripts are now installed with
  a version-specific suffix on "make altinstall".

2827 2828 2829 2830 2831
- Issue #10655: Fix the build on PowerPC on Linux with GCC when building with
  timestamp profiling (--with-tsc): the preprocessor test for the PowerPC
  support now looks for "__powerpc__" as well as "__ppc__": the latter seems to
  only be present on OS X; the former is the correct one for Linux with GCC.

2832 2833 2834
- Issue #1099: Fix the build on MacOSX when building a framework with pydebug
  using GCC 4.0.

2835 2836 2837
Tools/Demos
-----------

2838 2839 2840
- Issue #10843: Install the Tools directory on OS X in the applications Extras
  (/Applications/Python 3.n/Extras/) where the Demo directory had previous been
  installed.
2841

2842 2843 2844 2845
- Issue #7962: The Demo directory is gone.  Most of the old and unmaintained
  demos have been removed, others integrated in documentation or a new
  Tools/demo subdirectory.

2846
- Issue #10502: Addition of the unittestgui tool. Originally by Steve Purcell.
2847 2848
  Updated for test discovery by Mark Roddy and Python 3 compatibility by Brian
  Curtin.
2849

2850 2851 2852
Tests
-----

Ezio Melotti's avatar
Ezio Melotti committed
2853 2854
- Issue #11910: Fix test_heapq to skip the C tests when _heapq is missing.

2855 2856
- Fix test_startfile to wait for child process to terminate before finishing.

2857 2858 2859
- Issue #10822: Fix test_posix:test_getgroups failure under Solaris.  Patch
  by Ross Lagerwall.

2860 2861
- Make the --coverage flag work for test.regrtest.

2862 2863 2864
- Issue #1677694: Refactor and improve test_timeout.  Original patch by
  Björn Lindqvist.

2865 2866 2867
- Issue #5485: Add tests for the UseForeignDTD method of expat parser objects.
  Patch by Jean-Paul Calderone and Sandro Tosi.

2868 2869 2870
- Issue #6293: Have regrtest.py echo back sys.flags.  This is done by default in
  whole runs and enabled selectively using ``--header`` when running an explicit
  list of tests.  Original patch by Collin Winter.
2871

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2873 2874 2875
What's New in Python 3.2 Beta 2?
================================

Georg Brandl's avatar
Georg Brandl committed
2876
*Release date: 19-Dec-2010*
2877

2878 2879 2880
Core and Builtins
-----------------

2881 2882 2883
- Issue #8844: Regular and recursive lock acquisitions can now be interrupted
  by signals on platforms using pthreads.  Patch by Reid Kleckner.

2884 2885 2886
- Issue #4236: PyModule_Create2 now checks the import machinery directly
  rather than the Py_IsInitialized flag, avoiding a Fatal Python
  error in certain circumstances when an import is done in __del__.
2887

2888 2889 2890
- Issue #5587: add a repr to dict_proxy objects.  Patch by David Stanek and
  Daniel Urban.

2891 2892
Library
-------
2893

2894 2895 2896
- Issue #3243:  Support iterable bodies in httplib. Patch Contributions by
  Xuanji Li and Chris AtLee.

2897 2898 2899 2900 2901
- Issue #10611: SystemExit exception will no longer kill a unittest run.

- Issue #9857: It is now possible to skip a test in a setUp, tearDown or clean
  up function.

2902 2903 2904
- Issue #10573: use actual/expected consistently in unittest methods.
  The order of the args of assertCountEqual is also changed.

2905 2906 2907
- Issue #9286: email.utils.parseaddr no longer concatenates blank-separated
  words in the local part of email addresses, thereby preserving the input.

Antoine Pitrou's avatar
Antoine Pitrou committed
2908 2909 2910
- Issue #6791: Limit header line length (to 65535 bytes) in http.client
  and http.server, to avoid denial of services from the other party.

2911 2912 2913
- Issue #10404: Use ctl-button-1 on OSX for the context menu in Idle.

- Issue #9907: Fix tab handling on OSX when using editline by calling
2914 2915
  rl_initialize first, then setting our custom defaults, then reading .editrc.

2916 2917 2918
- Issue #4188: Avoid creating dummy thread objects when logging operations
  from the threading module (with the internal verbose flag activated).

2919 2920 2921
- Issue #10711: Remove HTTP 0.9 support from http.client.  The ``strict``
  parameter to HTTPConnection and friends is deprecated.

2922 2923
- Issue #9721: Fix the behavior of urljoin when the relative url starts with a
  ';' character. Patch by Wes Chow.
2924

2925 2926 2927
- Issue #10714: Limit length of incoming request in http.server to 65536 bytes
  for security reasons.  Initial patch by Ross Lagerwall.

2928 2929
- Issue #9558: Fix distutils.command.build_ext with VS 8.0.

2930 2931
- Issue #10667: Fast path for collections.Counter().

2932 2933 2934
- Issue #10695: passing the port as a string value to telnetlib no longer
  causes debug mode to fail.

2935 2936 2937
- Issue #1078919: add_header now automatically RFC2231 encodes parameters
  that contain non-ascii values.

2938
- Issue #10188 (partial resolution): tempfile.TemporaryDirectory emits
2939 2940 2941 2942 2943
  a warning on sys.stderr rather than throwing a misleading exception
  if cleanup fails due to nulling out of modules during shutdown.
  Also avoids an AttributeError when mkdtemp call fails and issues
  a ResourceWarning on implicit cleanup via __del__.

2944 2945 2946
- Issue #10107: Warn about unsaved files in IDLE on OSX.

- Issue #7213: subprocess.Popen's default for close_fds has been changed.
2947 2948 2949 2950 2951 2952
  It is now True in most cases other than on Windows when input, output or
  error handles are provided.

- Issue #6559: subprocess.Popen has a new pass_fds parameter (actually
  added in 3.2beta1) to allow specifying a specific list of file descriptors
  to keep open in the child process.
2953

2954 2955 2956 2957
- Issue #1731717: Fixed the problem where subprocess.wait() could cause an
  OSError exception when The OS had been told to ignore SIGCLD in our process
  or otherwise not wait for exiting child processes.

2958 2959 2960 2961 2962 2963
Tests
-----

- Issue #775964: test_grp now skips YP/NIS entries instead of failing when
  encountering them.

2964 2965 2966
Tools/Demos
-----------

2967 2968 2969
- Issue #6075: IDLE on Mac OS X now works with both Carbon AquaTk and
  Cocoa AquaTk.

2970 2971
- Issue #10710: ``Misc/setuid-prog.c`` is removed from the source tree.

2972 2973 2974
- Issue #10706: Remove outdated script runtests.sh.  Either ``make test``
  or ``python -m test`` should be used instead.

Martin v. Löwis's avatar
Martin v. Löwis committed
2975 2976 2977
Build
-----

Martin v. Löwis's avatar
Martin v. Löwis committed
2978
- The Windows build now uses Tcl/Tk 8.5.9 and sqlite3 3.7.4.
Martin v. Löwis's avatar
Martin v. Löwis committed
2979

2980 2981
- Issue #9234: argparse supports alias names for subparsers.

2982

Georg Brandl's avatar
Georg Brandl committed
2983 2984 2985
What's New in Python 3.2 Beta 1?
================================

Georg Brandl's avatar
Georg Brandl committed
2986
*Release date: 05-Dec-2010*
Georg Brandl's avatar
Georg Brandl committed
2987 2988 2989

Core and Builtins
-----------------
2990

Benjamin Peterson's avatar
Benjamin Peterson committed
2991 2992 2993
- Issue #10630: Return dict views from the dict proxy keys()/values()/items()
  methods.

Georg Brandl's avatar
Georg Brandl committed
2994 2995
- Issue #10596: Fix float.__mod__ to have the same behaviour as float.__divmod__
  with respect to signed zeros.  -4.0 % 4.0 should be 0.0, not -0.0.
2996

Georg Brandl's avatar
Georg Brandl committed
2997 2998
- Issue #1772833: Add the -q command-line option to suppress copyright and
  version output in interactive mode.
2999

3000 3001
- Provide an *optimize* parameter in the built-in compile() function.

Georg Brandl's avatar
Georg Brandl committed
3002 3003
- Fixed several corner case issues on Windows in os.stat/os.lstat related to
  reparse points.
3004

Martin v. Löwis's avatar
Martin v. Löwis committed
3005 3006
- PEP 384 (Defining a Stable ABI) is implemented.

Georg Brandl's avatar
Georg Brandl committed
3007
- Issue #2690: Range objects support negative indices and slicing.
3008

3009 3010
- Issue #9915: Speed up sorting with a key.

3011 3012
- Issue #8685: Speed up set difference ``a - b`` when source set ``a`` is much
  larger than operand ``b``.  Patch by Andrew Bennetts.
3013

3014 3015
- Issue #10518: Bring back the callable() builtin.

3016 3017 3018
- Issue #7094: Added alternate formatting (specified by '#') to ``__format__``
  method of float, complex, and Decimal. This allows more precise control over
  when decimal points are displayed.
3019

3020
- Issue #10474: range.count() should return integers.
3021

3022 3023 3024 3025 3026
- Issue #1574217: isinstance now catches only AttributeError, rather than
  masking all errors.

Library
-------
3027

3028 3029
- logging: added "handler of last resort". See http://bit.ly/last-resort-handler

3030 3031 3032
- test.support: Added TestHandler and Matcher classes for better support of
  assertions about logging.

3033 3034
- Issue #4391: Use proper plural forms in argparse.

3035 3036 3037
- Issue #10601: sys.displayhook uses 'backslashreplace' error handler on
  UnicodeEncodeError.

3038 3039
- Add the "display" and "undisplay" pdb commands.

Georg Brandl's avatar
Georg Brandl committed
3040 3041
- Issue #7245: Add a SIGINT handler in pdb that allows to break a program again
  after a "continue" command.
3042

3043 3044
- Add the "interact" pdb command.

3045 3046
- Issue #7905: Actually respect the keyencoding parameter to shelve.Shelf.

3047 3048
- Issue #1569291: Speed up array.repeat().

3049 3050 3051
- Provide an interface to set the optimization level of compilation in
  py_compile, compileall and zipfile.PyZipFile.

3052 3053 3054 3055
- Issue #7904: Changes to urllib.parse.urlsplit to handle schemes as defined by
  RFC3986. Anything before :// is considered a scheme and is followed by an
  authority (or netloc) and by '/' led path, which is optional.

3056 3057 3058
- Issue #6045: dbm.gnu databases now support get() and setdefault() methods.

- Issue #10620: `python -m unittest` can accept file paths instead of module
3059 3060 3061 3062 3063 3064
  names for running specific tests.

- Issue #9424: Deprecate the `unittest.TestCase` methods `assertEquals`,
  `assertNotEquals`, `assertAlmostEquals`, `assertNotAlmostEquals` and `assert_`
  and replace them with the correct methods in the Python test suite.

3065 3066 3067
- Issue #10272: The ssl module now raises socket.timeout instead of a generic
  SSLError on socket timeouts.

3068 3069 3070
- Issue #10528: Allow translators to reorder placeholders in localizable
  messages from argparse.

3071 3072
- Issue #10497: Fix incorrect use of gettext in argparse.

3073 3074 3075 3076
- Issue #10478: Reentrant calls inside buffered IO objects (for example by
  way of a signal handler) now raise a RuntimeError instead of freezing the
  current process.

3077 3078
- logging: Added getLogRecordFactory/setLogRecordFactory with docs and tests.

3079 3080
- Issue #10549: Fix pydoc traceback when text-documenting certain classes.

3081 3082 3083
- Issue #2001: New HTML server with enhanced Web page features.  Patch by Ron
  Adam.

3084 3085
- Issue #10360: In WeakSet, do not raise TypeErrors when testing for membership
  of non-weakrefable objects.
3086

3087 3088
- Issue #940286: pydoc.Helper.help() ignores input/output init parameters.

3089 3090
- Issue #1745035: Add a command size and data size limit to smtpd.py, to prevent
  DoS attacks.  Patch by Savio Sena.
3091

3092 3093 3094
- Issue #4925: Add filename to error message when executable can't be found in
  subprocess.

3095 3096 3097
- Issue #10391: Don't dereference invalid memory in error messages in the ast
  module.

3098 3099
- Issue #10027: st_nlink was not being set on Windows calls to os.stat or
  os.lstat. Patch by Hirokazu Yamamoto.
3100

3101 3102
- Issue #9333: Expose os.symlink only when the SeCreateSymbolicLinkPrivilege is
  held by the user's account, i.e., when the function can actually be used.
3103 3104

- Issue #8879: Add os.link support for Windows.
Georg Brandl's avatar
Georg Brandl committed
3105

3106
- Issue #7911: ``unittest.TestCase.longMessage`` defaults to True for improved
3107
  failure messages by default. Patch by Mark Roddy.
3108 3109 3110

- Issue #1486713: HTMLParser now has an optional tolerant mode where it tries to
  guess at the correct parsing of invalid html.
3111

3112 3113
- Issue #10554: Add context manager support to subprocess.Popen objects.

3114 3115 3116
- Issue #8989: email.utils.make_msgid now has a domain parameter that can
  override the domain name used in the generated msgid.

3117 3118 3119
- Issue #9299: Add exist_ok parameter to os.makedirs to suppress the 'File
  exists' exception when a target directory already exists with the specified
  mode. Patch by Ray Allen.
3120

3121 3122
- Issue #9573: os.fork() now works correctly when triggered as a side effect of
  a module import.
3123

3124 3125
- Issue #10464: netrc now correctly handles lines with embedded '#' characters.

3126 3127
- Added itertools.accumulate().

3128 3129 3130
- Issue #4113: Added custom ``__repr__`` method to ``functools.partial``.
  Original patch by Daniel Urban.

3131 3132 3133
- Issue #10273: Rename `assertRegexpMatches` and `assertRaisesRegexp` to
  `assertRegex` and `assertRaisesRegex`.

3134 3135
- Issue #10535: Enable silenced warnings in unittest by default.

3136 3137
- Issue #9873: The URL parsing functions in urllib.parse now accept ASCII byte
  sequences as input in addition to character strings.
3138

3139 3140
- Issue #10586: The statistics API for the new functools.lru_cache has been
  changed to a single cache_info() method returning a named tuple.
3141

3142 3143 3144
- Issue #10323: itertools.islice() now consumes the minimum number of inputs
  before stopping.  Formerly, the final state of the underlying iterator was
  undefined.
3145

3146 3147
- Issue #10565: The collections.Iterator ABC now checks for both __iter__ and
  __next__.
3148

3149 3150
- Issue #10242: Fixed implementation of unittest.ItemsEqual and gave it a new
  more informative name, unittest.CountEqual.
3151

3152 3153
- Issue #10561: In pdb, clear the breakpoints by the breakpoint number.

3154 3155
- Issue #2986: difflib.SequenceMatcher gets a new parameter, autojunk, which can
  be set to False to turn off the previously undocumented 'popularity'
3156 3157
  heuristic. Patch by Terry Reedy and Eli Bendersky.

3158 3159
- Issue #10534: in difflib, expose bjunk and bpopular sets; deprecate
  undocumented and now redundant isbjunk and isbpopular methods.
3160

Łukasz Langa's avatar
Łukasz Langa committed
3161 3162
- Issue #9846: zipfile is now correctly closing underlying file objects.

3163 3164
- Issue #10459: Update CJK character names to Unicode 6.0.

3165
- Issue #4493: urllib.request adds '/' in front of path components which does not
3166 3167
  start with '/. Common behavior exhibited by browsers and other clients.

3168 3169 3170
- Issue #6378: idle.bat now runs with the appropriate Python version rather than
  the system default. Patch by Sridhar Ratnakumar.

3171 3172 3173
- Issue #10470: 'python -m unittest' will now run test discovery by default,
  when no extra arguments have been provided.

3174 3175 3176 3177
- Issue #3709: BaseHTTPRequestHandler will buffer the headers and write to
  output stream only when end_headers is invoked. This is a speedup and an
  internal optimization.  Patch by endian.

3178 3179
- Issue #10220: Added inspect.getgeneratorstate. Initial patch by Rodolpho
  Eckhardt.
3180

3181 3182 3183
- Issue #10453: compileall now uses argparse instead of getopt, and thus
  provides clean output when called with '-h'.

3184 3185
- Issue #8078: Add constants for higher baud rates in the termios module.  Patch
  by Rodolpho Eckhardt.
3186

Éric Araujo's avatar
Éric Araujo committed
3187 3188
- Issue #10407: Fix two NameErrors in distutils.

3189
- Issue #10371: Deprecated undocumented functions in the trace module.
3190

3191 3192 3193
- Issue #10467: Fix BytesIO.readinto() after seeking into a position after the
  end of the file.

3194 3195
- configparser: 100% test coverage.

3196 3197
- Issue #10499: configparser supports pluggable interpolation handlers. The
  default classic interpolation handler is called BasicInterpolation. Another
3198 3199 3200
  interpolation handler added (ExtendedInterpolation) which supports the syntax
  used by zc.buildout (e.g. interpolation between sections).

3201 3202 3203
- configparser: the SafeConfigParser class has been renamed to ConfigParser.
  The legacy ConfigParser class has been removed but its interpolation mechanism
  is still available as LegacyInterpolation.
3204

3205 3206 3207
- configparser: Usage of RawConfigParser is now discouraged for new projects
  in favor of ConfigParser(interpolation=None).

3208 3209 3210 3211 3212 3213 3214 3215 3216
- Issue #1682942: configparser supports alternative option/value delimiters.

- Issue #5412: configparser supports mapping protocol access.

- Issue #9411: configparser supports specifying encoding for read operations.

- Issue #9421: configparser's getint(), getfloat() and getboolean() methods
  accept vars and default arguments just like get() does.

3217 3218 3219
- Issue #9452: configparser supports reading from strings and dictionaries
  (thanks to the mapping protocol API, the latter can be used to copy data
  between parsers).
3220 3221 3222 3223 3224

- configparser: accepted INI file structure is now customizable, including
  comment prefixes, name of the DEFAULT section, empty lines in multiline
  values, and indentation.

3225
- Issue #10326: unittest.TestCase instances can be pickled.
3226

3227
- Issue #9926: Wrapped TestSuite subclass does not get __call__ executed.
3228

3229 3230 3231
- Issue #9920: Skip tests for cmath.atan and cmath.atanh applied to complex
  zeros on systems where the log1p function fails to respect the sign of zero.
  This fixes a test failure on AIX.
3232

3233 3234
- Issue #9732: Addition of getattr_static to the inspect module.

3235 3236 3237
- Issue #10446: Module documentation generated by pydoc now links to a
  version-specific online reference manual.

3238 3239
- Make the 'No module named' exception message from importlib consistent.

3240 3241
- Issue #10443: Add the SSLContext.set_default_verify_paths() method.

3242 3243 3244
- Issue #10440: Support RUSAGE_THREAD as a constant in the resource module.
  Patch by Robert Collins.

3245 3246
- Issue #10429: IMAP.starttls() stored the capabilities as bytes objects, rather
  than strings.
3247

3248 3249 3250
C-API
-----

3251
- Issue #10557: Added a new API function, PyUnicode_TransformDecimalToASCII(),
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Georg Brandl committed
3252 3253
  which transforms non-ASCII decimal digits in a Unicode string to their ASCII
  equivalents.
3254

3255 3256
- Issue #9518: Extend the PyModuleDef_HEAD_INIT macro to explicitly
  zero-initialize all fields, fixing compiler warnings seen when building
3257 3258
  extension modules with gcc with "-Wmissing-field-initializers" (implied by
  "-W").
3259 3260 3261 3262

- Issue #10255: Fix reference leak in Py_InitializeEx().  Patch by Neil
  Schemenauer.

3263 3264
- structseq.h is now included in Python.h.

3265 3266
- Loosen PyArg_ValidateKeywordArguments to allow dict subclasses.

3267 3268 3269
Tests
-----

3270
- regrtest.py once again ensures the test directory is removed from sys.path
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3271
  when it is invoked directly as the __main__ module.
3272

Georg Brandl's avatar
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3273 3274
- `python -m test` can be used to run the test suite as well as `python -m
  test.regrtest`.
3275

3276 3277
- Do not fail test_socket when the IP address of the local hostname cannot be
  looked up.
3278

3279 3280
- Issue #8886: Use context managers throughout test_zipfile. Patch by Eric
  Carstensen.
3281

3282 3283 3284 3285 3286 3287
Build
-----

- Issue #10325: Fix two issues in the fallback definitions for PY_ULLONG_MAX and
  PY_LLONG_MAX that made them unsuitable for use in preprocessor conditionals.

3288 3289 3290 3291 3292
Documentation
-------------

- Issue #10299: List the built-in functions in a table in functions.rst.

Georg Brandl's avatar
Georg Brandl committed
3293

Georg Brandl's avatar
Georg Brandl committed
3294 3295
What's New in Python 3.2 Alpha 4?
=================================
Martin v. Löwis's avatar
Martin v. Löwis committed
3296

Georg Brandl's avatar
Georg Brandl committed
3297
*Release date: 13-Nov-2010*
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3298 3299 3300 3301

Core and Builtins
-----------------

3302 3303 3304
- Issue #10372: Import the warnings module only after the IO library is
  initialized, so as to avoid bootstrap issues with the '-W' option.

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Georg Brandl committed
3305 3306
- Issue #10293: Remove obsolete field in the PyMemoryView structure, unused
  undocumented value PyBUF_SHADOW, and strangely-looking code in
3307 3308
  PyMemoryView_GetContiguous.

Georg Brandl's avatar
Georg Brandl committed
3309
- Issue #6081: Add str.format_map(), similar to ``str.format(**mapping)``.
3310

3311 3312
- If FileIO.__init__ fails, close the file descriptor.

3313 3314 3315
- Issue #10221: dict.pop(k) now has a key error message that includes the
  missing key (same message d[k] returns for missing keys).

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3316
- Issue #5437: A preallocated MemoryError instance should not keep traceback
3317 3318
  data (including local variables caught in the stack trace) alive infinitely.

3319 3320 3321
- Issue #10186: Fix the SyntaxError caret when the offset is equal to the length
  of the offending line.

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3322 3323
- Issue #10089: Add support for arbitrary -X options on the command line.  They
  can be retrieved through a new attribute ``sys._xoptions``.
3324

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- Issue #4388: On Mac OS X, decode command line arguments from UTF-8, instead of
  the locale encoding.  If the LANG (and LC_ALL and LC_CTYPE) environment
3327
  variable is not set, the locale encoding is ISO-8859-1, whereas most programs
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  (including Python) expect UTF-8.  Python already uses UTF-8 for the filesystem
3329 3330
  encoding and to encode command line arguments on this OS.

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3331 3332
- Issue #9713, #10114: Parser functions (e.g. PyParser_ASTFromFile) expect
  filenames encoded to the filesystem encoding with the surrogateescape error
3333 3334
  handler (to support undecodable bytes), instead of UTF-8 in strict mode.

3335 3336 3337
- Issue #9997: Don't let the name "top" have special significance in scope
  resolution.

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3338 3339
- Issue #9862: Compensate for broken PIPE_BUF in AIX by hard coding its value as
  the default 512 when compiling on AIX.
3340

3341 3342 3343
- Use locale encoding instead of UTF-8 to encode and decode filenames if
  Py_FileSystemDefaultEncoding is not set.

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3344
- Issue #10095: fp_setreadl() doesn't reopen the file, instead reuse the file
3345 3346
  descriptor.

3347 3348 3349
- Issue #9418: Moved private string methods ``_formatter_parser`` and
  ``_formatter_field_name_split`` into a new ``_string`` module.

3350 3351
- Issue #9992: Remove PYTHONFSENCODING environment variable.

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Library
-------
3354

3355 3356
- Issue #12943: python -m tokenize support has been added to tokenize.

3357 3358
- Issue #10465: fix broken delegating of attributes by gzip._PaddedFile.

3359 3360
- Issue #10356: Decimal.__hash__(-1) should return -2.

3361 3362
- Issue #1553375: logging: Added stack_info kwarg to display stack information.

3363 3364
- Issue #5111: IPv6 Host in the Header is wrapped inside [ ]. Patch by Chandru.

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3365 3366
- Fix Fraction.__hash__ so that Fraction.__hash__(-1) is -2.  (See also issue
  #10356.)
3367

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3368 3369
- Issue #4471: Add the IMAP.starttls() method to enable encryption on standard
  IMAP4 connections.  Original patch by Lorenzo M. Catucci.
3370

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3371 3372
- Issue #1466065: Add 'validate' option to base64.b64decode to raise an error if
  there are non-base64 alphabet characters in the input.
3373

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3374
- Issue #10386: Add __all__ to token module; this simplifies importing in
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  tokenize module and prevents leaking of private names through ``import *``.
3376

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3377 3378
- Issue #4471: Properly shutdown socket in IMAP.shutdown().  Patch by Lorenzo
  M. Catucci.
3379

3380 3381
- Fix IMAP.login() to work properly.

3382
- Issue #9244: multiprocessing pool worker processes could terminate
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3383 3384
  unexpectedly if the return value of a task could not be pickled.  Only the
  ``repr`` of such errors are now sent back, wrapped in an
3385 3386
  ``MaybeEncodingError`` exception.

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- Issue #9244: The ``apply_async()`` and ``map_async()`` methods of
  ``multiprocessing.Pool`` now accepts a ``error_callback`` argument.  This can
  be a callback with the signature ``callback(exc)``, which will be called if
  the target raises an exception.
3391

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3392 3393
- Issue #10022: The dictionary returned by the ``getpeercert()`` method of SSL
  sockets now has additional items such as ``issuer`` and ``notBefore``.
3394

3395 3396
- ``usenetrc`` is now false by default for NNTP objects.

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3397 3398
- Issue #1926: Add support for NNTP over SSL on port 563, as well as STARTTLS.
  Patch by Andrew Vant.
3399

3400 3401
- Issue #10335: Add tokenize.open(), detect the file encoding using
  tokenize.detect_encoding() and open it in read only mode.
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3402

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- Issue #10321: Add support for binary data to smtplib.SMTP.sendmail, and a new
  method send_message to send an email.message.Message object.
3405

3406 3407 3408 3409 3410
- Issue #6011: sysconfig and distutils.sysconfig use the surrogateescape error
  handler to parse the Makefile file.  Avoid a UnicodeDecodeError if the source
  code directory name contains a non-ASCII character and the locale encoding is
  ASCII.

3411
- Issue #10329: The trace module writes reports using the input Python script
3412
  encoding, instead of the locale encoding.  Patch written by Alexander
3413 3414
  Belopolsky.

3415 3416 3417
- Issue #10126: Fix distutils' test_build when Python was built with
  --enable-shared.

3418 3419 3420
- Issue #9281: Prevent race condition with mkdir in distutils.  Patch by
  Arfrever.

3421 3422
- Issue #10229: Fix caching error in gettext.

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3423 3424 3425
- Issue #10252: Close file objects in a timely manner in distutils code and
  tests.  Patch by Brian Brazil, completed by Éric Araujo.

3426 3427 3428
- Issue #10180: Pickling file objects is now explicitly forbidden, since
  unpickling them produced nonsensical results.

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3429 3430
- Issue #10311: The signal module now restores errno before returning from its
  low-level signal handler.  Patch by Hallvard B Furuseth.
3431

3432 3433
- Issue #10282: Add a ``nntp_implementation`` attribute to NNTP objects.

3434 3435
- Issue #10283: Add a ``group_pattern`` argument to NNTP.list().

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3436 3437
- Issue #10155: Add IISCGIHandler to wsgiref.handlers to support IIS CGI
  environment better, and to correct unicode environment values for WSGI 1.0.1.
3438

3439 3440 3441
- Issue #10281: nntplib now returns None for absent fields in the OVER/XOVER
  response, instead of raising an exception.

3442 3443
- wsgiref now implements and validates PEP 3333, rather than an experimental
  extension of PEP 333.  (Note: earlier versions of Python 3.x may have
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3444 3445 3446
  incorrectly validated some non-compliant applications as WSGI compliant; if
  your app validates with Python <3.2b1+, but not on this version, it is likely
  the case that your app was not compliant.)
3447

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3448 3449
- Issue #10280: NNTP.nntp_version should reflect the highest version advertised
  by the server.
3450

3451 3452
- Issue #10184: Touch directories only once when extracting a tarfile.

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3453 3454
- Issue #10199: New package, ``turtledemo`` now contains selected demo scripts
  that were formerly found under Demo/turtle.
3455

3456 3457
- Issue #10265: Close file objects explicitly in sunau.  Patch by Brian Brazil.

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3458 3459
- Issue #10266: uu.decode didn't close in_file explicitly when it was given as a
  filename.  Patch by Brian Brazil.
3460

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3461 3462
- Issue #10110: Queue objects didn't recognize full queues when the maxsize
  parameter had been reduced.
3463

3464 3465
- Issue #10160: Speed up operator.attrgetter.  Patch by Christos Georgiou.

3466 3467
- logging: Added style option to basicConfig() to allow %, {} or $-formatting.

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3468 3469
- Issue #5729: json.dumps() now supports using a string such as '\t' for
  pretty-printing multilevel objects.
3470

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3471 3472
- Issue #10253: FileIO leaks a file descriptor when trying to open a file for
  append that isn't seekable.  Patch by Brian Brazil.
3473

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3474 3475
- Support context manager protocol for file-like objects returned by mailbox
  ``get_file()`` methods.
3476

3477 3478 3479
- Issue #10246: uu.encode didn't close file objects explicitly when filenames
  were given to it.  Patch by Brian Brazil.

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3480 3481
- Issue #10198: fix duplicate header written to wave files when writeframes() is
  called without data.
3482

3483 3484
- Close file objects in modulefinder in a timely manner.

3485 3486 3487 3488 3489 3490
- Close a io.TextIOWrapper object in email.parser in a timely manner.

- Close a file object in distutils.sysconfig in a timely manner.

- Close a file object in pkgutil in a timely manner.

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3491 3492
- Issue #10233: Close file objects in a timely manner in the tarfile module and
  its test suite.
3493

3494
- Issue #10093: ResourceWarnings are now issued when files and sockets are
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3495 3496
  deallocated without explicit closing.  These warnings are silenced by default,
  except in pydebug mode.
3497

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3498 3499
- tarfile.py: Add support for all missing variants of the GNU sparse extensions
  and create files with holes when extracting sparse members.
3500

3501 3502
- Issue #10218: Return timeout status from ``Condition.wait`` in threading.

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3503 3504
- Issue #7351: Add ``zipfile.BadZipFile`` spelling of the exception name and
  deprecate the old name ``zipfile.BadZipfile``.
3505

3506 3507 3508 3509
- Issue #5027: The standard ``xml`` namespace is now understood by
  xml.sax.saxutils.XMLGenerator as being bound to
  http://www.w3.org/XML/1998/namespace.  Patch by Troy J. Farrell.

3510 3511 3512
- Issue #5975: Add csv.unix_dialect class.

- Issue #7761: telnetlib.interact failures on Windows fixed.
3513

3514 3515
- logging: Added style option to Formatter to allow %, {} or $-formatting.

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3516 3517
- Issue #5178: Added tempfile.TemporaryDirectory class that can be used as a
  context manager.
3518

3519 3520 3521
- Issue #1349106: Generator (and BytesGenerator) flatten method and Header
  encode method now support a 'linesep' argument.

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3522 3523 3524
- Issue #5639: Add a *server_hostname* argument to ``SSLContext.wrap_socket`` in
  order to support the TLS SNI extension.  ``HTTPSConnection`` and ``urlopen()``
  also use this argument, so that HTTPS virtual hosts are now supported.
3525

3526 3527
- Issue #10166: Avoid recursion in pstats Stats.add() for many stats items.

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3528
- Issue #10163: Skip unreadable registry keys during mimetypes initialization.
3529

3530 3531
- logging: Made StreamHandler terminator configurable.

3532 3533
- logging: Allowed filters to be just callables.

3534 3535
- logging: Added tests for _logRecordClass changes.

3536 3537
- Issue #10092: Properly reset locale in calendar.Locale*Calendar classes.

3538 3539 3540
- logging: Added _logRecordClass, getLogRecordClass, setLogRecordClass to
  increase flexibility of LogRecord creation.

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3541 3542 3543
- Issue #5117: Case normalization was needed on ntpath.relpath().  Also fixed
  root directory issue on posixpath.relpath().  (Ported working fixes from
  ntpath.)
3544

3545 3546 3547
- Issue #1343: xml.sax.saxutils.XMLGenerator now has an option
  short_empty_elements to direct it to use self-closing tags when appropriate.

3548 3549 3550
- Issue #9807 (part 1): Expose the ABI flags in sys.abiflags.  Add --abiflags
  switch to python-config for command line access.

3551 3552
- Issue #6098: Don't claim DOM level 3 conformance in minidom.

3553 3554 3555
- Issue #5762: Fix AttributeError raised by ``xml.dom.minidom`` when an empty
  XML namespace attribute is encountered.

3556
- Issue #2830: Add the ``html.escape()`` function, which quotes all problematic
3557
  characters by default.  Deprecate ``cgi.escape()``.
3558

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3559
- Issue #9409: Fix the regex to match all kind of filenames, for interactive
3560 3561
  debugging in doctests.

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3562 3563
- Issue #9183: ``datetime.timezone(datetime.timedelta(0))`` will now return the
  same instance as ``datetime.timezone.utc``.
3564

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3565 3566
- Issue #7523: Add SOCK_CLOEXEC and SOCK_NONBLOCK to the socket module, where
  supported by the system.  Patch by Nikita Vetoshkin.
3567 3568

- Issue #10063: file:// scheme will stop accessing remote hosts via ftp
3569
  protocol. file:// urls had fallback to access remote hosts via ftp. This was
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3570 3571
  not correct, change is made to raise a URLError when a remote host is tried to
  access via file:// scheme.
3572

3573 3574 3575 3576
- Issue #1710703: Write structures for an empty ZIP archive when a ZipFile is
  created in modes 'a' or 'w' and then closed without adding any files. Raise
  BadZipfile (rather than IOError) when opening small non-ZIP files.

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3577 3578 3579
- Issue #10041: The signature of optional arguments in socket.makefile() didn't
  match that of io.open(), and they also didn't get forwarded properly to
  TextIOWrapper in text mode.  Patch by Kai Zhu.
3580

3581
- Issue #9003: http.client.HTTPSConnection, urllib.request.HTTPSHandler and
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3582 3583
  urllib.request.urlopen now take optional arguments to allow for server
  certificate checking, as recommended in public uses of HTTPS.
3584

3585 3586 3587
- Issue #6612: Fix site and sysconfig to catch os.getcwd() error, eg. if the
  current directory was deleted. Patch written by W. Trevor King.

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- Issue #3873: Speed up unpickling from file objects that have a peek() method.
3589

3590 3591
- Issue #10075: Add a session_stats() method to SSLContext objects.

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3592 3593
- Issue #9948: Fixed problem of losing filename case information.

3594 3595
Extension Modules
-----------------
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3597 3598 3599
- Issue #5109: array.array constructor will now use fast code when
  initial data is provided in an array object with correct type.

3600 3601
- Issue #6317: Now winsound.PlaySound only accepts unicode.

3602 3603
- Issue #6317: Now winsound.PlaySound can accept non ascii filename.

3604 3605
- Issue #9377: Use Unicode API for gethostname on Windows.

3606 3607
- Issue #10143: Update "os.pathconf" values.

3608 3609
- Issue #6518: Support context manager protcol for ossaudiodev types.

3610 3611
- Issue #678250: Make mmap flush a noop on ACCESS_READ and ACCESS_COPY.

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3612 3613
- Issue #9054: Fix a crash occurring when using the pyexpat module with expat
  version 2.0.1.
3614

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3615 3616 3617
- Issue #5355: Provide mappings from Expat error numbers to string descriptions
  and backwards, in order to actually make it possible to analyze error codes
  provided by ExpatError.
3618

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3619 3620
- The Unicode database was updated to 6.0.0.

3621 3622 3623
C-API
-----

3624
- Issue #10288: The deprecated family of "char"-handling macros
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  (ISLOWER()/ISUPPER()/etc) have now been removed: use Py_ISLOWER() etc instead.
3626

3627 3628 3629
- Issue #9778: Hash values are now always the size of pointers. A new Py_hash_t
  type has been introduced.

3630 3631 3632
Tools/Demos
-----------

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3633 3634 3635
- Issue #10117: Tools/scripts/reindent.py now accepts source files that use
  encoding other than ASCII or UTF-8.  Source encoding is preserved when
  reindented code is written to a file.
3636

3637 3638
- Issue #7287: Demo/imputil/knee.py was removed.

3639 3640 3641
Tests
-----

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3642 3643
- Issue #3699: Fix test_bigaddrspace and extend it to test bytestrings as well
  as unicode strings.  Initial patch by Sandro Tosi.
3644

3645 3646
- Issue #10294: Remove dead code form test_unicode_file.

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3647 3648
- Issue #10123: Don't use non-ascii filenames in test_doctest tests. Add a new
  test specific to unicode (non-ascii name and filename).
3649

3650 3651 3652
Build
-----

3653 3654
- Issue #10268: Add a --enable-loadable-sqlite-extensions option to configure.

3655 3656
- Issue #8852: Allow the socket module to build on OpenSolaris.

3657 3658
- Drop -OPT:Olimit compiler option.

3659 3660
- Issue #10094: Use versioned .so files on GNU/kfreeBSD and the GNU Hurd.

3661 3662
- Accept Oracle Berkeley DB 5.0 and 5.1 as backend for the dbm extension.

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3663 3664
- Issue #7473: avoid link errors when building a framework with a different set
  of architectures than the one that is currently installed.
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3665

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3666

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What's New in Python 3.2 Alpha 3?
=================================

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*Release date: 09-Oct-2010*
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Core and Builtins
-----------------

3675 3676 3677
- Issue #10068: Global objects which have reference cycles with their module's
  dict are now cleared again. This causes issue #7140 to appear again.

3678
- Issue #9738: Document PyErr_SetString() and PyErr_SetFromErrnoWithFilename()
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  encodings.
3680

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- ast.literal_eval() can now handle negative numbers.  It is also a little more
  liberal in what it accepts without compromising the safety of the evaluation.
  For example, 3j+4 and 3+4+5 are both accepted.
3684

3685 3686 3687
- Issue #10006: type.__abstractmethods__ now raises an AttributeError.  As a
  result metaclasses can now be ABCs (see #9533).

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- Issue #8670: ctypes.c_wchar supports non-BMP characters with 32 bits wchar_t.

3690
- Issue #8670: PyUnicode_AsWideChar() and PyUnicode_AsWideCharString() replace
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3691 3692
  UTF-16 surrogate pairs by single non-BMP characters for 16 bits Py_UNICODE and
  32 bits wchar_t (eg. Linux in narrow build).
3693

3694
- Issue #10003: Allow handling of SIGBREAK on Windows. Fixes a regression
3695
  introduced by issue #9324.
3696

3697 3698
- Issue #9979: Create function PyUnicode_AsWideCharString().

3699 3700 3701
- Issue #7397: Mention that importlib.import_module() is probably what someone
  really wants to be using in __import__'s docstring.

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3702 3703
- Issue #8521: Allow CreateKeyEx, OpenKeyEx, and DeleteKeyEx functions of winreg
  to use named arguments.
3704

3705
- Issue #9930: Remove bogus subtype check that was causing (e.g.)
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3706
  float.__rdiv__(2.0, 3) to return NotImplemented instead of the expected 1.5.
3707

3708 3709
- Issue #9808: Implement os.getlogin for Windows. Patch by Jon Anglin.

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3710 3711 3712 3713
- Issue #9901: Destroying the GIL in Py_Finalize() can fail if some other
  threads are still running.  Instead, reinitialize the GIL on a second call to
  Py_Initialize().

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- All SyntaxErrors now have a column offset and therefore a caret when the error
  is printed.
3716

3717 3718 3719
- Issue #9252: PyImport_Import no longer uses a fromlist hack to return the
  module that was imported, but instead gets the module from sys.modules.

3720
- Issue #9213: The range type_items now provides index() and count() methods, to
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3721
  conform to the Sequence ABC.  Patch by Daniel Urban and Daniel Stutzbach.
3722

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- Issue #7994: Issue a PendingDeprecationWarning if object.__format__ is called
  with a non-empty format string.  This is an effort to future-proof user
  code. If a derived class does not currently implement __format__ but later
  adds its own __format__, it would most likely break user code that had
  supplied a format string.  This will be changed to a DeprecationWaring in
  Python 3.3 and it will be an error in Python 3.4.
3729

3730 3731 3732 3733
- Issue #9828: Destroy the GIL in Py_Finalize(), so that it gets properly
  re-created on a subsequent call to Py_Initialize().  The problem (a crash)
  wouldn't appear in 3.1 or 2.7 where the GIL's structure is more trivial.

3734 3735 3736 3737
- Issue #9210: Configure option --with-wctype-functions was removed.  Using the
  functions from the libc caused the methods .upper() and lower() to become
  locale aware and created subtly wrong results.

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3738 3739
- Issue #9738: PyUnicode_FromFormat() and PyErr_Format() raise an error on a
  non-ASCII byte in the format string.
3740

3741 3742 3743 3744
- Issue #4617: Previously it was illegal to delete a name from the local
  namespace if it occurs as a free variable in a nested block.  This limitation
  of the compiler has been lifted, and a new opcode introduced (DELETE_DEREF).

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- Issue #9804: ascii() now always represents unicode surrogate pairs as a single
  ``\UXXXXXXXX``, regardless of whether the character is printable or not.
  Also, the "backslashreplace" error handler now joins surrogate pairs into a
  single character on UCS-2 builds.
3749

3750 3751 3752 3753
- Issue #9757: memoryview objects get a release() method to release the
  underlying buffer (previously this was only done when deallocating the
  memoryview), and gain support for the context management protocol.

3754 3755 3756
- Issue #9797: pystate.c wrongly assumed that zero couldn't be a valid
  thread-local storage key.

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Library
-------

3760 3761
- Issue #2236: distutils' mkpath ignored the mode parameter.

3762 3763 3764 3765 3766 3767 3768
- Fix typo in one sdist option (medata-check).

- Issue #9199: Fix incorrect use of distutils.cmd.Command.announce.

- Issue #1718574: Fix options that were supposed to accept arguments but did
  not in build_clib.

3769 3770
- Issue #9437: Fix building C extensions with non-default LDFLAGS.

3771 3772 3773
- Issue #4661: email can now parse bytes input and generate either converted
  7bit output or bytes output.  Email version bumped to 5.1.0.

3774 3775 3776
- Issue #1589: Add ssl.match_hostname(), to help implement server identity
  verification for higher-level protocols.

3777 3778 3779
- Issue #9759: GzipFile now raises ValueError when an operation is attempted
  after the file is closed.  Patch by Jeffrey Finkelstein.

3780 3781 3782
- Issue #9042: Fix interaction of custom translation classes and caching in
  gettext.

3783
- Issue #6706: asyncore.dispatcher now provides a handle_accepted() method
3784
  returning a (sock, addr) pair which is called when a connection has been
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3785
  established with a new remote endpoint.  This is supposed to be used as a
3786 3787 3788
  replacement for old handle_accept() and avoids the user to call accept()
  directly.

3789 3790 3791
- Issue #9065: tarfile no longer uses "root" as the default for the uname and
  gname field.

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3792 3793
- Issue #8980: Fixed a failure in distutils.command check that was shadowed by
  an environment that does not have docutils.  Patch by Arfrever.
3794

3795 3796 3797
- Issue #1050268: parseaddr now correctly quotes double quote and backslash
  characters that appear inside quoted strings in email addresses.

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3798 3799
- Issue #10004: quoprimime no longer generates a traceback when confronted with
  invalid characters after '=' in a Q-encoded word.
3800

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- Issue #1491: BaseHTTPServer nows send a ``100 Continue`` response before
  sending a 200 OK for the Expect: 100-continue request header.
3803

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- Issue #9360: Cleanup and improvements to the nntplib module.  The API now
  conforms to the philosophy of bytes and unicode separation in Python 3.  A
  test suite has also been added.
3807

3808 3809
- Issue #9962: GzipFile now has the peek() method.

3810
- Issue #9090: When a socket with a timeout fails with EWOULDBLOCK or EAGAIN,
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  retry the select() loop instead of bailing out.  This is because select() can
  incorrectly report a socket as ready for reading (for example, if it received
  some data with an invalid checksum).
3814

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- Issue #3612: Added new types to ctypes.wintypes. (CHAR and pointers)

3817
- Issue #9950: Fix socket.sendall() crash or misbehaviour when a signal is
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  received.  Now sendall() properly calls signal handlers if necessary, and
  retries sending if these returned successfully, including on sockets with a
  timeout.
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- Issue #9947: logging: Fixed locking bug in stopListening.

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- Issue #9945: logging: Fixed locking bugs in addHandler/removeHandler.

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- Issue #9936: Fixed executable lines' search in the trace module.

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- Issue #9790: Rework imports necessary for samefile and sameopenfile
  in ntpath.

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- Issue #9928: Properly initialize the types exported by the bz2 module.

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- Issue #1675951: Allow GzipFile to work with unseekable file objects.  Patch by
  Florian Festi.
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- Logging: Added QueueListener class to facilitate logging usage for
  performance-critical threads.

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- Issue #9916: Add some missing errno symbols.

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- Issue #9877: Expose sysconfig.get_makefile_filename()

- logging: Added hasHandlers() method to Logger and LoggerAdapter.

3845 3846
- Issue #9908: Fix os.stat() on bytes paths under Windows 7.

3847 3848 3849
- Issue #2643: msync() is not called anymore when deallocating an open mmap
  object, only munmap().

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- logging: Changed LoggerAdapter implementation internally, to make it easier to
  subclass in a useful way.
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- logging: hasHandlers method was added to Logger, and isEnabledFor,
  getEffectiveLevel, hasHandlers and setLevel were added to LoggerAdapter.
  LoggerAdapter was introduced into the unit tests for logging.

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- Issue #1686: Fix string.Template when overriding the pattern attribute.

3859
- Issue #9854: SocketIO objects now observe the RawIOBase interface in
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  non-blocking mode: they return None when an operation would block (instead of
  raising an exception).
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- Issue #1730136: Fix the comparison between a tk.font.Font and an object of
  another kind.

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- Issue #9441: logging has better coverage for rotating file handlers.

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- Issue #9865: collections.OrderedDict now has a __sizeof__ method.
3869

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- Issue #9854: The default read() implementation in io.RawIOBase now handles
  non-blocking readinto() returning None correctly.
3872

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- Issue #1552: socket.socketpair() now returns regular socket.socket objects
  supporting the whole socket API (rather than the "raw" _socket.socket
  objects).
3876

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- Issue #9853: Fix the signature of SSLSocket.recvfrom() and SSLSocket.sendto()
  to match the corresponding socket methods.
3879

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- Issue #9840: Added a decorator to reprlib for wrapping __repr__ methods to make
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  them handle recursive calls within the same thread.
3882

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- logging: Enhanced HTTPHandler with secure and credentials initializers.

3885
- Issue #767645: Set os.path.supports_unicode_filenames to True on Mac OS X.
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- Issue #9837: The read() method of ZipExtFile objects (as returned by
  ZipFile.open()) could return more bytes than requested.

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- Issue #9826: OrderedDict.__repr__ can now handle self-referential values:
  d['x'] = d.
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- Issue #9825: Using __del__ in the definition of collections.OrderedDict made
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  it possible for the user to create self-referencing ordered dictionaries which
  become permanently uncollectable GC garbage.  Reinstated the Python 3.1
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  approach of using weakref proxies so that reference cycles never get created
  in the first place.

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- Issue #9579, #9580: Fix os.confstr() for value longer than 255 bytes and
  encode the value with filesystem encoding and surrogateescape (instead of
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  utf-8 in strict mode) . Patch written by David Watson.
3902

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- Issue #9632: Remove sys.setfilesystemencoding() function: use PYTHONFSENCODING
  environment variable to set the filesystem encoding at Python startup.
  sys.setfilesystemencoding() creates inconsistencies because it is unable to
  reencode all filenames in all objects.
3907

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- Issue #9410: Various optimizations to the pickle module, leading to speedups
  up to 4x (depending on the benchmark).  Mostly ported from Unladen Swallow;
  initial patch by Alexandre Vassalotti.
3911

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- The pprint module now supports printing OrderedDicts in their given order
  (formerly, it would sort the keys).
3914

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- Logging: Added QueueHandler class to facilitate logging usage with
  multiprocessing.

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- Issue #9707: Rewritten reference implementation of threading.local which is
  friendlier towards reference cycles.  This change is not normally visible
  since an optimized C implementation (_thread._local) is used instead.
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- Issue #6394: os.getppid() is now supported on Windows.  Note that it will
  still return the id of the parent process after it has exited.  This process
  id may even have been reused by another unrelated process.

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- Issue #9792: In case of connection failure, socket.create_connection() would
  swallow the exception and raise a new one, making it impossible to fetch the
  original errno, or to filter timeout errors.  Now the original error is
  re-raised.
3930

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- Issue #9758: When fcntl.ioctl() was called with mutable_flag set to True, and
  the passed buffer was exactly 1024 bytes long, the buffer wouldn't be updated
  back after the system call.  Original patch by Brian Brazil.
3934

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- Updates to the random module:

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  * Document which parts of the module are guaranteed to stay the same across
    versions and which parts are subject to change.
3939

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  * Update the seed() method to use all of the bits in a string instead of just
    the hash value.  This makes better use of the seed value and assures the
    seeding is platform independent.  Issue #7889.
3943

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  * Improved the random()-->integer algorithm used in choice(), shuffle(),
    sample(), randrange(), and randint().  Formerly, it used int(n*random())
    which has a slight bias whenever n is not a power of two.  Issue #9025.
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  * Improved documentation of arguments to randrange().  Issue #9379.
3949

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- collections.OrderedDict now supports a new method for repositioning keys to
  either end.
3952

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- Issue #9754: Similarly to assertRaises and assertRaisesRegexp, unittest test
  cases now also have assertWarns and assertWarnsRegexp methods to check that a
  given warning type was triggered by the code under test.
3956

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- Issue #5506: BytesIO objects now have a getbuffer() method exporting a view of
  their contents without duplicating them.  The view is both readable and
  writable.
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- Issue #7566: Implement os.path.sameopenfile for Windows.

3963
- Issue #9293: I/O streams now raise ``io.UnsupportedOperation`` when an
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  unsupported operation is attempted (for example, writing to a file open only
  for reading).
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- hashlib has two new constant attributes: algorithms_guaranteed and
  algorithms_avaiable that respectively list the names of hash algorithms
  guaranteed to exist in all Python implementations and the names of hash
  algorithms available in the current process.

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- A new package ``concurrent.futures`` as defined by PEP 3148.

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C-API
-----

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- Add PyErr_SyntaxLocationEx, which supports passing a column offset.

3979 3980 3981 3982
- Issue #9834: Don't segfault in PySequence_GetSlice, PySequence_SetSlice, or
  PySequence_DelSlice when the object doesn't have any mapping operations
  defined.

3983 3984 3985
Tools/Demos
-----------

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- Issue #9188: The gdb extension now handles correctly narrow (UCS2) as well as
  wide (UCS4) unicode builds for both the host interpreter (embedded inside gdb)
  and the interpreter under test.
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Tests
-----

3993 3994 3995
- Issue #9308: Added tests for importing encoded modules that do not
  depend on specific stdlib modules being encoded in a certain way.

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- Issue #1051: Add a script (Lib/test/make_ssl_certs.py) to generate the custom
  certificate and private key files used by SSL-related certs.
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- Issue #9978: Wait until subprocess completes initialization. (Win32KillTests
  in test_os)

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- Issue #7110: regrtest now sends test failure reports and single-failure
  tracebacks to stderr rather than stdout.

4005 4006
- Issue #9628: fix runtests.sh -x option so more than one test can be excluded.

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- Issue #9899: Fix test_tkinter.test_font on various platforms.  Patch by Ned
  Deily.
4009

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- Issue #9894: Do not hardcode ENOENT in test_subprocess.

4012 4013
- Issue #9315: Added tests for the trace module.  Patch by Eli Bendersky.

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- Issue #9323: Make test.regrtest.__file__ absolute, this was not always the
  case when running profile or trace, for example.

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- Issue #9568: Fix test_urllib2_localnet on OS X 10.3.

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Build
-----

4022 4023
- Issue #10062: Allow building on platforms which do not have sem_timedwait.

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- Issue #10054: Some platforms provide uintptr_t in inttypes.h.  Patch by Akira
  Kitada.
4026

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- Issue #10055: Make json C89-compliant in UCS4 mode.

4029 4030
- Issue #9552: Avoid unnecessary rebuild of OpenSSL. (Windows)

4031 4032
- Issue #1633863: Don't ignore $CC under AIX.

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- Issue #9810: Compile bzip2 source files in Python's project file directly. It
  used to be built with bzip2's makefile.
4035

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- Issue #9848: Stopping trying to build _weakref in setup.py as it is a built-in
  module.
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- Issue #9806: python-config now has an ``--extension-suffix`` option that
  outputs the suffix for dynamic libraries including the ABI version name
  defined by PEP 3149.

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- Issue #941346: Improve the build process under AIX and allow Python to be
  built as a shared library.  Patch by Sébastien Sablé.
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- Issue #4026: Make the fcntl extension build under AIX.  Patch by Sébastien
  Sablé.

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- Issue #9701: The MacOSX installer can patch the shell profile to ensure that
  the "bin" directory inside the framework is on the shell's search path. This
  feature now also supports the ZSH shell.

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What's New in Python 3.2 Alpha 2?
=================================

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*Release date: 05-Sep-2010*
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Core and Builtins
-----------------

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- Issue #9225: Remove the ROT_FOUR and DUP_TOPX opcode, the latter replaced by
  the new (and simpler) DUP_TOP_TWO.  Performance isn't changed, but our
  bytecode is a bit simplified.  Patch by Demur Rumed.
4065

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- Issue #9766: Rename poorly named variables exposed by _warnings to prevent
  confusion with the proper variables names from 'warnings' itself.

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- Issue #9212: dict_keys and dict_items now provide the isdisjoint() method, to
  conform to the Set ABC.  Patch by Daniel Urban.
4071

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- Issue #9737: Fix a crash when trying to delete a slice or an item from a
  memoryview object.
4074

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- Issue #9549: sys.setdefaultencoding() and PyUnicode_SetDefaultEncoding() are
  now removed, since their effect was inexistent in 3.x (the default encoding is
  hardcoded to utf-8 and cannot be changed).
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- Issue #7415: PyUnicode_FromEncodedObject() now uses the new buffer API
  properly.  Patch by Stefan Behnel.

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- Issue #5553: The Py_LOCAL_INLINE macro now results in inlining on most
  platforms.  Previously, it inlined only when using Microsoft Visual C.
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- Issue #9712: Fix tokenize on identifiers that start with non-ascii names.

4087 4088
- Issue #9688: __basicsize__ and __itemsize__ must be accessed as Py_ssize_t.

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- Issue #9684: Added a definition for SIZEOF_WCHAR_T to PC/pyconfig.h, to match
  the pyconfig.h generated by configure on other systems.
4091

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- Issue #9666: Only catch AttributeError in hasattr(). All other exceptions that
  occur during attribute lookup are now propagated to the caller.
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- Issue #8622: Add PYTHONFSENCODING environment variable to override the
  filesystem encoding.

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- Issue #5127: The C functions that access the Unicode Database now accept and
  return characters from the full Unicode range, even on narrow unicode builds
  (Py_UNICODE_TOLOWER, Py_UNICODE_ISDECIMAL, and others).  A visible difference
  in Python is that unicodedata.numeric() now returns the correct value for
  large code points, and repr() may consider more characters as printable.

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- Issue #9425: Create PyModule_GetFilenameObject() function to get the filename
  as a unicode object, instead of a byte string. Function needed to support
  unencodable filenames. Deprecate PyModule_GetFilename() in favor on the new
  function.

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- Issue #8063: Call _PyGILState_Init() earlier in Py_InitializeEx().

4111 4112
- Issue #9612: The set object is now 64-bit clean under Windows.

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- Issue #8202: sys.argv[0] is now set to '-m' instead of '-c' when searching for
  the module file to be executed with the -m command line option.
4115

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- Issue #9599: Create PySys_FormatStdout() and PySys_FormatStderr() functions to
  write a message formatted by PyUnicode_FromFormatV() to sys.stdout and
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  sys.stderr.

4120
- Issue #9542: Create PyUnicode_FSDecoder() function, a ParseTuple converter:
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  decode bytes objects to unicode using PyUnicode_DecodeFSDefaultAndSize(); str
  objects are output as-is.
4123

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- Issue #9203: Computed gotos are now enabled by default on supported compilers
  (which are detected by the configure script).  They can still be disable
  selectively by specifying --without-computed-gotos.
4127

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- Issue #9425: Create PyErr_WarnFormat() function, similar to PyErr_WarnEx() but
  use PyUnicode_FromFormatV() to format the warning message.
4130

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- Issue #8530: Prevent stringlib fastsearch from reading beyond the front of an
  array.
4133

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- Issue #5319: Print an error if flushing stdout fails at interpreter shutdown.
4135

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- Issue #9337: The str() of a float or complex number is now identical to its
  repr().
4138

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- Issue #9416: Fix some issues with complex formatting where the output with no
  type specifier failed to match the str output:
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    - format(complex(-0.0, 2.0), '-') omitted the real part from the output,
    - format(complex(0.0, 2.0), '-') included a sign and parentheses.

4145 4146
Extension Modules
-----------------
4147

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- Issue #8013: time.asctime and time.ctime no longer call system
  asctime and ctime functions.  The year range for time.asctime is now
  1900 through maxint.  The range for time.ctime is the same as for
  time.localtime.  The string produced by these functions is longer
  than 24 characters when year is greater than 9999.

4154 4155 4156
- Issue #6608: time.asctime is now checking struct tm fields its input
  before passing it to the system asctime.  Patch by MunSic Jeong.

4157 4158 4159
- Issue #8734: Avoid crash in msvcrt.get_osfhandle() when an invalid file
  descriptor is provided.  Patch by Pascal Chambon.

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- Issue #7736: Release the GIL around calls to opendir() and closedir() in the
  posix module.  Patch by Marcin Bachry.
4162

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- Issue #4835: make PyLong_FromSocket_t() and PyLong_AsSocket_t() private to the
  socket module, and fix the width of socket descriptors to be correctly
  detected under 64-bit Windows.
4166

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- Issue #1027206: Support IDNA in gethostbyname, gethostbyname_ex, getaddrinfo
  and gethostbyaddr.  getnameinfo is now restricted to numeric addresses as
  input.
4170

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- Issue #9214: Set operations on a KeysView or ItemsView in collections now
  correctly return a set.  Patch by Eli Bendersky.
4173

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- Issue #5737: Add Solaris-specific mnemonics in the errno module.  Patch by
  Matthew Ahrens.

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- Restore GIL in nis_cat in case of error. Decode NIS data to fs encoding, using
  the surrogate error handler.
4179

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- Issue #665761: ``functools.reduce()`` will no longer mask exceptions other
  than ``TypeError`` raised by the iterator argument.
4182

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- Issue #9570: Use PEP 383 decoding in os.mknod and os.mkfifo.

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- Issue #6915: Under Windows, os.listdir() didn't release the Global Interpreter
  Lock around all system calls.  Original patch by Ryan Kelly.
4187

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- Issue #8524: Add a detach() method to socket objects, so as to put the socket
  into the closed state without closing the underlying file descriptor.
4190

4191
- Issue #477863: Emit a ResourceWarning at shutdown if gc.garbage is not empty.
4192

4193 4194
- Issue #6869: Fix a refcount problem in the _ctypes extension.

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- Issue #5504: ctypes should now work with systems where mmap can't be
  PROT_WRITE and PROT_EXEC.
4197

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- Issue #9507: Named tuple repr will now automatically display the right name in
  a tuple subclass.
4200

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- Issue #9324: Add parameter validation to signal.signal on Windows in order to
  prevent crashes.
4203

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- Issue #9526: Remove some outdated (int) casts that were preventing the array
  module from working correctly with arrays of more than 2**31 elements.
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- Fix memory leak in ssl._ssl._test_decode_cert.

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- Issue #8065: Fix memory leak in readline module (from failure to free the
  result of history_get_history_state()).
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- Issue #9450: Fix memory leak in readline.replace_history_item and
  readline.remove_history_item for readline version >= 5.0.

4215 4216
- Issue #8105: Validate file descriptor passed to mmap.mmap on Windows.

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- Issue #8046: Add context manager protocol support and .closed property to mmap
  objects.
4219

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Library
-------

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- Issue #7451: Improve decoding performance of JSON objects, and reduce the
  memory consumption of said decoded objects when they use the same strings as
  keys.
4226

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- Issue #1100562: Fix deep-copying of objects derived from the list and dict
  types.  Patch by Michele Orrù and Björn Lindqvist.
4229

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- Issue #9753: Fixed socket.dup, which did not always work correctly on Windows.
4231

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- Issue #9421: Made the get<type> methods consistently accept the vars and
  default arguments on all parser classes.
4234

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- Issue #7005: Fixed output of None values for RawConfigParser.write and
  ConfigParser.write.

4238 4239
- Issue #8990: array.fromstring() and array.tostring() get renamed to
  frombytes() and tobytes(), respectively, to avoid confusion.  Furthermore,
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  array.frombytes(), array.extend() as well as the array.array() constructor now
  accept bytearray objects.  Patch by Thomas Jollans.
4242

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- Issue #808164: Fixed socket.close to avoid references to globals, to avoid
  issues when socket.close is called from a __del__ method.
4245

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4246
- Issue #9706: ssl module provides a better error handling in various
4247 4248
  circumstances.

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- Issue #1868: Eliminate subtle timing issues in thread-local objects by getting
  rid of the cached copy of thread-local attribute dictionary.
4251

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- Issue #1512791: In setframerate() in the wave module, non-integral frame rates
  are rounded to the nearest integer.
4254

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- Issue #8797: urllib2 does a retry for Basic Authentication failure instead of
  falling into recursion.

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- Issue #1194222: email.utils.parsedate now returns RFC2822 compliant four
  character years even if the message contains RFC822 two character years.

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- Issue #8750: Fixed MutableSet's methods to correctly handle reflexive
  operations on its self, namely x -= x and x ^= x.
4263

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- Issue #9129: smtpd.py is vulnerable to DoS attacks deriving from missing error
  handling when accepting a new connection.
4266

4267
- Issue #9601: ftplib now provides a workaround for non-compliant
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  implementations such as IIS shipped with Windows server 2003 returning invalid
  response codes for MKD and PWD commands.
4270

4271
- Issue #658749: asyncore's connect() method now correctly interprets winsock
4272
  errors.
4273

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- Issue #9501: Fixed logging regressions in cleanup code.

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- Fix functools.total_ordering() to skip methods inherited from object.
4277

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- Issue #9572: Importlib should not raise an exception if a directory it thought
  it needed to create was done concurrently by another process.
4280

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- Issue #9617: Signals received during a low-level write operation aren't
  ignored by the buffered IO layer anymore.

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- Issue #843590: Make "macintosh" an alias to the "mac_roman" encoding.

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- Create os.fsdecode(): decode from the filesystem encoding with surrogateescape
  error handler, or strict error handler on Windows.
4288

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4289 4290
- Issue #3488: Provide convenient shorthand functions ``gzip.compress`` and
  ``gzip.decompress``.  Original patch by Anand B. Pillai.
4291

Georg Brandl's avatar
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4292 4293
- Issue #8807: poplib.POP3_SSL class now accepts a context parameter, which is a
  ssl.SSLContext object allowing bundling SSL configuration options,
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  certificates and private keys into a single (potentially long-lived)
  structure.

4297 4298 4299
- Issue #8866: parameters passed to socket.getaddrinfo can now be specified as
  single keyword arguments.

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4300 4301
- Address XXX comment in dis.py by having inspect.py prefer to reuse the dis.py
  compiler flag values over defining its own.
4302

Georg Brandl's avatar
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4303 4304
- Issue #9147: Added dis.code_info() which is similar to show_code() but returns
  formatted code information in a string rather than displaying on screen.
4305

4306
- Issue #9567: functools.update_wrapper now adds a __wrapped__ attribute
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4307
  pointing to the original callable.
4308

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4309 4310
- Issue #3445: functools.update_wrapper now tolerates missing attributes on
  wrapped callables.
4311

4312 4313
- Issue #5867: Add abc.abstractclassmethod and abc.abstractstaticmethod.

4314 4315 4316
- Issue #9605: posix.getlogin() decodes the username with file filesystem
  encoding and surrogateescape error handler. Patch written by David Watson.

4317 4318 4319
- Issue #9604: posix.initgroups() encodes the username using the fileystem
  encoding and surrogateescape error handler. Patch written by David Watson.

4320
- Issue #9603: posix.ttyname() and posix.ctermid() decode the terminal name
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4321 4322
  using the filesystem encoding and surrogateescape error handler. Patch written
  by David Watson.
4323

Georg Brandl's avatar
Georg Brandl committed
4324 4325
- Issue #7647: The posix module now has the ST_RDONLY and ST_NOSUID constants,
  for use with the statvfs() function.  Patch by Adam Jackson.
4326

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4327 4328 4329
- Issue #8688: MANIFEST files created by distutils now include a magic comment
  indicating they are generated.  Manually maintained MANIFESTs without this
  marker will not be overwritten or removed.
4330

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Georg Brandl committed
4331 4332 4333
- Issue #7467: when reading a file from a ZIP archive, its CRC is checked and a
  BadZipfile error is raised if it doesn't match (as used to be the case in
  Python 2.5 and earlier).
4334

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4335 4336 4337 4338
- Issue #9550: a BufferedReader could issue an additional read when the original
  read request had been satisfied, which could block indefinitely when the
  underlying raw IO channel was e.g. a socket.  Report and original patch by
  Jason V. Miller.
4339

4340
- Issue #3757: thread-local objects now support cyclic garbage collection.
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4341 4342
  Thread-local objects involved in reference cycles will be deallocated timely
  by the cyclic GC, even if the underlying thread is still running.
4343

4344
- Issue #9452: Add read_file, read_string, and read_dict to the configparser
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4345 4346
  API; new source attribute to exceptions.

Georg Brandl's avatar
Georg Brandl committed
4347 4348
- Issue #6231: Fix xml.etree.ElementInclude to include the tail of the current
  node.
4349

4350 4351 4352
- Issue #8047: Fix the xml.etree serializer to return bytes by default.  Use
  ``encoding="unicode"`` to generate a Unicode string.

Georg Brandl's avatar
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4353 4354 4355
- Issue #8280: urllib2's Request method will remove fragments in the url.  This
  is how it is supposed to work, wget and curl do the same.  Previous behavior
  was wrong.
4356

4357
- Issue #6683: For SMTP logins we now try all authentication methods advertised
4358 4359
  by the server.  Many servers are buggy and advertise authentication methods
  they do not support in reality.
4360

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4361 4362 4363
- Issue #8814: function annotations (the ``__annotations__`` attribute) are now
  included in the set of attributes copied by default by functools.wraps and
  functools.update_wrapper.  Patch by Terrence Cole.
4364

4365 4366
- Issue #2944: asyncore doesn't handle connection refused correctly.

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4367 4368
- Issue #4184: Private attributes on smtpd.SMTPChannel made public and deprecate
  the private attributes. Add tests for smtpd module.
4369

Georg Brandl's avatar
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4370 4371
- Issue #3196: email header decoding is now forgiving if an RFC2047 encoded word
  encoded in base64 is lacking padding.
4372

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4373 4374 4375
- Issue #9444: Argparse now uses the first element of prefix_chars as the option
  character for the added 'h/help' option if prefix_chars does not contain a
  '-', instead of raising an error.
4376

Georg Brandl's avatar
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4377 4378
- Issue #7372: Fix pstats regression when stripping paths from profile data
  generated with the profile module.
4379

Georg Brandl's avatar
Georg Brandl committed
4380 4381
- Issue #9428: Fix running scripts with the profile/cProfile modules from the
  command line.
4382

Georg Brandl's avatar
Georg Brandl committed
4383 4384
- Issue #7781: Fix restricting stats by entry counts in the pstats interactive
  browser.
4385

Georg Brandl's avatar
Georg Brandl committed
4386 4387
- Issue #9209: Do not crash in the pstats interactive browser on invalid regular
  expressions.
4388

Georg Brandl's avatar
Georg Brandl committed
4389 4390
- Update collections.OrderedDict to match the implementation in Py2.7 (based on
  lists instead of weakly referenced Link objects).
4391

Georg Brandl's avatar
Georg Brandl committed
4392 4393
- Issue #8397: Raise an error when attempting to mix iteration and regular reads
  on a BZ2File object, rather than returning incorrect results.
4394

4395 4396 4397
- Issue #9448: Fix a leak of OS resources (mutexes or semaphores) when
  re-initializing a buffered IO object by calling its ``__init__`` method.

4398 4399 4400
- Issue #1713: Fix os.path.ismount(), which returned true for symbolic links
  across devices.

4401 4402
- Issue #8826: Properly load old-style "expires" attribute in http.cookies.

4403 4404
- Issue #1690103: Fix initial namespace for code run with trace.main().

Georg Brandl's avatar
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4405 4406
- Issue #7395: Fix tracebacks in pstats interactive browser.

4407 4408
- Issue #8230: Fix Lib/test/sortperf.py.

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4409 4410
- Issue #8620: when a cmd.Cmd() is fed input that reaches EOF without a final
  newline, it no longer truncates the last character of the last command line.
4411

4412 4413
- Issue #5146: Handle UID THREAD command correctly in imaplib.

4414 4415 4416
- Issue #5147: Fix the header generated for cookie files written by
  http.cookiejar.MozillaCookieJar.

Georg Brandl's avatar
Georg Brandl committed
4417 4418
- Issue #8198: In pydoc, output all help text to the correct stream when
  sys.stdout is reassigned.
4419

Georg Brandl's avatar
Georg Brandl committed
4420 4421
- Issue #7909: Do not touch paths with the special prefixes ``\\.\`` or ``\\?\``
  in ntpath.normpath().
4422

4423 4424
- Issue #1286: Allow using fileinput.FileInput as a context manager.

4425
- Add lru_cache() decorator to the functools module.
4426

4427 4428 4429
Tools/Demos
-----------

4430 4431
- Fix ``Tools/scripts/checkpyc.py`` after PEP 3147.

4432 4433 4434
- Issue #8867: Fix ``Tools/scripts/serve.py`` to work with files containing
  non-ASCII content.

4435 4436 4437
Tests
-----

4438 4439
- Issue #9601: Provide a test case for ftplib.parse257.

4440 4441
- Issue #8857: Provide a test case for socket.getaddrinfo.

4442 4443
- Issue #7564: Skip test_ioctl if another process is attached to /dev/tty.

4444 4445
- Issue #8433: Fix test_curses failure with newer versions of ncurses.

4446 4447 4448
- Issue #9496: Provide a test suite for the rlcompleter module.  Patch by
  Michele Orrù.

4449 4450
- Issue #8687: provide a test suite for sched.py module.

4451 4452 4453
Build
-----

4454 4455
- Issue #1303434: Generate ZIP file containing all PDBs.

4456 4457
- Issue #9193: PEP 3149 is accepted.

Georg Brandl's avatar
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4458 4459
- Issue #3101: Helper functions _add_one_to_index_C() and _add_one_to_index_F()
  become _Py_add_one_to_index_C() and _Py_add_one_to_index_F(), respectively.
4460

4461 4462 4463
- Issue #9700: define HAVE_BROKEN_POSIX_SEMAPHORES under AIX 6.x.  Patch by
  Sébastien Sablé.

4464 4465
- Don't run pgen twice when using make -j.

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4466

Benjamin Peterson's avatar
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4467 4468 4469
What's New in Python 3.2 Alpha 1?
=================================

4470
*Release date: 01-Aug-2010*
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4471 4472 4473 4474

Core and Builtins
-----------------

4475 4476
- Issue #8991: convertbuffer() rejects discontigious buffers.

4477 4478 4479
- Issue #7616: Fix copying of overlapping memoryview slices with the Intel
  compiler.

4480 4481
- Issue #8413: structsequence now subclasses tuple.

4482
- Issue #8271: during the decoding of an invalid UTF-8 byte sequence, only the
4483 4484 4485 4486 4487 4488
  start byte and the continuation byte(s) are now considered invalid, instead of
  the number of bytes specified by the start byte.  E.g.:
  '\xf1\x80AB'.decode('utf-8', 'replace') now returns u'\ufffdAB' and replaces
  with U+FFFD only the start byte ('\xf1') and the continuation byte ('\x80')
  even if '\xf1' is the start byte of a 4-bytes sequence.  Previous versions
  returned a single u'\ufffd'.
4489

4490 4491
- Issue #9011: A negated imaginary literal (e.g., "-7j") now has real part -0.0
  rather than 0.0.  So "-7j" is now exactly equivalent to "-(7j)".
4492

4493 4494
- Be more specific in error messages about positional arguments.

4495 4496 4497
- Issue #8949: "z" format of PyArg_Parse*() functions doesn't accept bytes
  objects, as described in the documentation.

4498
- Issue #6543: Write the traceback in the terminal encoding instead of utf-8.
4499
  Fix the encoding of the modules filename.  Patch written by Amaury Forgeot
4500
  d'Arc.
4501

4502 4503 4504
- Issue #9011: Remove buggy and unnecessary (in 3.x) ST->AST compilation code
  dealing with unary minus applied to a constant.  The removed code was mutating
  the ST, causing a second compilation to fail.
4505

4506
- Issue #850997: mbcs encoding (Windows only) handles errors argument: strict
4507
  mode raises unicode errors.  The encoder only supports "strict" and "replace"
4508
  error handlers, the decoder only supports "strict" and "ignore" error
4509
  handlers.  Patch written by Mark Hammond.
4510

4511 4512 4513
- Issue #8850: Remove "w" and "w#" formats from PyArg_Parse*() functions, use
  "w*" format instead. Add tests for "w*" format.

4514
- Issue #8592: PyArg_Parse*() functions raise a TypeError for "y", "u" and "Z"
4515
  formats if the string contains a null byte/character.  Write unit tests for
4516 4517
  string formats.

4518
- Issue #7490: To facilitate sharing of doctests between 2.x and 3.x test
4519 4520 4521
  suites, the IGNORE_EXCEPTION_DETAIL directive now also ignores the module
  location of the raised exception.

4522 4523 4524
- Issue #8969: On Windows, use mbcs codec in strict mode to encode and decode
  filenames and enable os.fsencode().

4525 4526
- Issue #9058: Remove assertions about INT_MAX in UnicodeDecodeError.

4527 4528 4529
- Issue #8941: Decoding big endian UTF-32 data in UCS-2 builds could crash the
  interpreter with characters outside the Basic Multilingual Plane (higher than
  0x10000).
4530

4531 4532 4533 4534
- Issue #8950: (See also issue #5080).  Py_ArgParse*() functions now raise
  TypeError instead of giving a DeprecationWarning when a float is parsed using
  the 'L' code (for long long).  (All other integer codes already raise
  TypeError in this case.)
4535

4536 4537 4538 4539
- Issue #8922: Normalize the encoding name in PyUnicode_AsEncodedString() to
  enable shortcuts for upper case encoding name. Add also a shortcut for
  "iso-8859-1" in PyUnicode_AsEncodedString() and PyUnicode_Decode().

4540 4541
- Issue #8838: Remove codecs.charbuffer_encode() function.  The buffer protocol
  doesn't support "char buffer" anymore in Python 3.
4542 4543

- Issue #8339: Remove "t#" format of PyArg_Parse*() functions, use "s#" or "s*"
4544
  instead.  codecs.charbuffer_encode() now accepts modifiable buffer objects
4545 4546
  like bytearray.

4547
- Issue #8837: Remove "O?" format of PyArg_Parse*() functions.  The format is no
4548 4549
  used anymore and it was never documented.

4550
- In str.format(), raise a ValueError when indexes to arguments are too large.
4551

4552 4553
- Issue #2844: Make int('42', n) consistently raise ValueError for invalid
  integers n (including n = -909).
4554

4555 4556 4557 4558
- Issue #8188: Introduce a new scheme for computing hashes of numbers (instances
  of int, float, complex, decimal.Decimal and fractions.Fraction) that makes it
  easy to maintain the invariant that hash(x) == hash(y) whenever x and y have
  equal value.
4559

4560 4561
- Issue #8748: Fix two issues with comparisons between complex and integer
  objects.  (1) The comparison could incorrectly return True in some cases
4562 4563 4564 4565
  (2**53+1 == complex(2**53) == 2**53), breaking transitivity of equality.
  (2) The comparison raised an OverflowError for large integers, leading to
  unpredictable exceptions when combining integers and complex objects in sets
  or dicts.
4566

4567 4568 4569
- Issue #8766: Initialize _warnings module before importing the first module.
  Fix a crash if an empty directory called "encodings" exists in sys.path.

4570
- Issue #8589: Decode PYTHONWARNINGS environment variable with the file system
4571
  encoding and surrogateescape error handler instead of the locale encoding to
4572
  be consistent with os.environ.  Add PySys_AddWarnOptionUnicode() function.
4573

4574 4575
- PyObject_Dump() encodes unicode objects to utf8 with backslashreplace (instead
  of strict) error handler to escape surrogates.
4576

4577 4578
- Issue #8715: Create PyUnicode_EncodeFSDefault() function: Encode a Unicode
  object to Py_FileSystemDefaultEncoding with the "surrogateescape" error
4579
  handler, and return bytes.  If Py_FileSystemDefaultEncoding is not set, fall
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4580
  back to UTF-8.
4581

4582
- Enable shortcuts for common encodings in PyUnicode_AsEncodedString() for any
4583
  error handler, not only the default error handler (strict).
4584

4585
- Issue #8610: Load file system codec at startup, and display a fatal error on
4586
  failure.  Set the file system encoding to utf-8 (instead of None) if getting
4587 4588
  the locale encoding failed, or if nl_langinfo(CODESET) function is missing.

4589
- PyFile_FromFd() uses PyUnicode_DecodeFSDefault() instead of
4590 4591
  PyUnicode_FromString() to support surrogates in the filename and use the right
  encoding.
4592

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4593 4594
- Issue #7507: Quote "!" in pipes.quote(); it is special to some shells.

4595
- PyUnicode_DecodeFSDefaultAndSize() uses surrogateescape error handler.
4596

4597 4598 4599
- Issue #8419: Prevent the dict constructor from accepting non-string keyword
  arguments.

4600
- Issue #8124: PySys_WriteStdout() and PySys_WriteStderr() don't execute
4601 4602
  indirectly Python signal handlers anymore because mywrite() ignores exceptions
  (KeyboardInterrupt).
4603

4604
- Issue #8092: Fix PyUnicode_EncodeUTF8() to support error handler producing
4605
  unicode string (eg. backslashreplace).
4606

4607 4608
- Issue #8485: PyUnicode_FSConverter() doesn't accept byteearray objects
  anymore, you have to convert your bytearray filenames to bytes.
4609

4610
- Issue #7332: Remove the 16KB stack-based buffer in
4611 4612 4613
  PyMarshal_ReadLastObjectFromFile, which doesn't bring any noticeable benefit
  compared to the dynamic memory allocation fallback.  Patch by Charles-François
  Natali.
4614

4615 4616 4617
- Issue #8417: Raise an OverflowError when an integer larger than sys.maxsize is
  passed to bytes or bytearray.

4618 4619
- Issue #7301: Add environment variable $PYTHONWARNINGS.

4620 4621 4622
- Issue #8329: Don't return the same lists from select.select when no fds are
  changed.

4623 4624 4625
- Issue #8259: 1L << (2**31) no longer produces an 'outrageous shift error' on
  64-bit machines.  The shift count for either left or right shift is permitted
  to be up to sys.maxsize.
4626

4627 4628
- Ensure that tokenization of identifiers is not affected by locale.

4629 4630
- Issue #1222585: Added LDCXXSHARED for C++ support. Patch by Arfrever.

4631 4632
- Raise a TypeError when trying to delete a T_STRING_INPLACE struct member.

4633 4634
- Issue #8211: Save/restore CFLAGS around AC_PROG_CC in configure.in, in case it
  is set.
4635

4636
- Issue #8226: sys.setfilesystemencoding() raises a LookupError if the encoding
4637
  is unknown.
4638

4639
- Issue #1583863: A str subclass can now override the __str__ method.
4640

4641
- Issue #8014: Setting a T_UINT or T_PYSSIZET attribute of an object with
4642
  PyMemberDefs could produce an internal error; raise TypeError instead.
4643

4644 4645 4646 4647 4648
- Issue #7845: Rich comparison methods on the complex type now return
  NotImplemented rather than raising a TypeError when comparing with an
  incompatible type; this allows user-defined classes to implement their own
  comparisons with complex.

4649 4650
- Issue #3137: Don't ignore errors at startup, especially a keyboard interrupt
  (SIGINT). If an error occurs while importing the site module, the error is
4651
  printed and Python exits. Initialize the GIL before importing the site module.
4652

4653 4654
- Issue #7173: Generator finalization could invalidate sys.exc_info().

4655 4656
- Issue #7544: Preallocate thread memory before creating the thread to avoid a
  fatal error in low memory condition.
4657

4658 4659
- Issue #7820: The parser tokenizer restores all bytes in the right if the BOM
  check fails.
4660

4661 4662
- Handle errors from looking up __prepare__ correctly.

4663 4664
- Issue #5939: Add additional runtime checking to ensure a valid capsule in
  Modules/_ctypes/callproc.c.
4665

4666
- Issue #7309: Fix unchecked attribute access when converting
4667
  UnicodeEncodeError, UnicodeDecodeError, and UnicodeTranslateError to strings.
4668

4669 4670
- Issue #6902: Fix problem with built-in types format incorrectly with 0
  padding.
4671

4672 4673
- Issue #7988: Fix default alignment to be right aligned for complex.__format__.
  Now it matches other numeric types.
4674

4675
- Issue #5988: Remove deprecated functions PyOS_ascii_formatd,
4676 4677
  PyOS_ascii_strtod, and PyOS_ascii_atof.  Use PyOS_double_to_string and
  PyOS_string_to_double instead.  See issue #5835 for the original deprecations.
4678

4679 4680
- Issue #7385: Fix a crash in `MemoryView_FromObject` when `PyObject_GetBuffer`
  fails.  Patch by Florent Xicluna.
4681

4682 4683
- Issue #7788: Fix an interpreter crash produced by deleting a list slice with
  very large step value.
4684

4685 4686 4687 4688
- Issue #7766: Change sys.getwindowsversion() return value to a named tuple and
  add the additional members returned in an OSVERSIONINFOEX structure.  The new
  members are service_pack_major, service_pack_minor, suite_mask, and
  product_type.
4689

4690 4691 4692
- Issue #7561: Operations on empty bytearrays (such as `int(bytearray())`) could
  crash in many places because of the PyByteArray_AS_STRING() macro returning
  NULL.  The macro now returns a statically allocated empty string instead.
4693

4694
- Issue #6690: Optimize the bytecode for expressions such as `x in {1, 2, 3}`,
4695 4696 4697 4698 4699 4700 4701 4702 4703 4704 4705 4706 4707 4708 4709 4710
  where the right hand operand is a set of constants, by turning the set into a
  frozenset and pre-building it as a constant.  The comparison operation is made
  against the constant instead of building a new set each time it is executed (a
  similar optimization already existed which turned a list of constants into a
  pre-built tuple).  Patch and additional tests by Dave Malcolm.

- Issue #7622: Improve the split(), rsplit(), splitlines() and replace() methods
  of bytes, bytearray and unicode objects by using a common implementation based
  on stringlib's fast search.  Patch by Florent Xicluna.

- Issue #7632: Fix various str -> float conversion bugs present in 2.7 alpha 2,
  including: (1) a serious 'wrong output' bug that could occur for long (> 40
  digit) input strings, (2) a crash in dtoa.c that occurred in debug builds when
  parsing certain long numeric strings corresponding to subnormal values, (3) a
  memory leak for some values large enough to cause overflow, and (4) a number
  of flaws that could lead to incorrectly rounded results.
4711

4712 4713 4714
- The __complex__ method is now looked up on the class of instances to make it
  consistent with other special methods.

4715 4716 4717
- Issue #7462: Implement the stringlib fast search algorithm for the `rfind`,
  `rindex`, `rsplit` and `rpartition` methods.  Patch by Florent Xicluna.

4718 4719 4720
- Issue #7604: Deleting an unset slotted attribute did not raise an
  AttributeError.

4721 4722
- Issue #7534: Fix handling of IEEE specials (infinities, nans, negative zero)
  in ** operator.  The behaviour now conforms to that described in C99 Annex F.
4723

4724 4725 4726 4727
- Issue #1811: improve accuracy and cross-platform consistency for true division
  of integers: the result of a/b is now correctly rounded for ints a and b (at
  least on IEEE 754 platforms), and in particular does not depend on the
  internal representation of an int.
4728

4729 4730 4731
- Issue #6834: replace the implementation for the 'python' and 'pythonw'
  executables on OSX.

4732 4733 4734
  These executables now work properly with the arch(1) command: ``arch -ppc
  python`` will start a universal binary version of python in PPC mode (unlike
  previous releases).
4735

4736 4737
- Issue #7466: Segmentation fault when the garbage collector is called in the
  middle of populating a tuple.  Patch by Florent Xicluna.
4738

4739 4740 4741
- Issue #7419: setlocale() could crash the interpreter on Windows when called
  with invalid values.

4742 4743 4744
- Issue #6077: On Windows, files opened with tempfile.TemporaryFile in "wt+"
  mode would appear truncated on the first '0x1a' byte (aka. Ctrl+Z).

4745 4746
- Issue #7085: Fix crash when importing some extensions in a thread on MacOSX
  10.6.
4747

4748 4749
- Issue #1757126: Fix the cyrillic-asian alias for the ptcp154 encoding.

4750 4751 4752
- Issue #6970: Remove redundant calls when comparing objects that don't
  implement the relevant rich comparison methods.

4753 4754 4755 4756 4757
- Issue #7298: Fixes for range and reversed(range(...)).  Iteration over
  range(a, b, c) incorrectly gave an empty iterator when a, b and c fit in C
  long but the length of the range did not.  Also fix several cases where
  reversed(range(a, b, c)) gave wrong results, and fix a refleak for
  reversed(range(a, b, c)) with large arguments.
4758

4759 4760
- Issue #7244: itertools.izip_longest() no longer ignores exceptions raised
  during the formation of an output tuple.
4761

4762 4763 4764
- Issue #3297: On wide unicode builds, do not split unicode characters into
  surrogates.

4765 4766
- Remove length limitation when constructing a complex number from a string.

4767 4768
- Issue #1087418: Boost performance of bitwise operations for longs.

4769 4770 4771 4772 4773 4774 4775
- Support for AtheOS has been completely removed from the code base. It was
  disabled since Python 3.0.

- Support for several legacy threading libraries has been disabled. These
  libraries are: Mach C threads, SunOS LWP, GNU pth, Irix threads. Support code
  will be entirely removed in 3.3.

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4776
- Support for OSF* has been disabled. If nobody stands up, support will be
4777
  removed in 3.3. See <http://bugs.python.org/issue8606>.
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4778

4779 4780
- Peephole constant folding had missed UNARY_POSITIVE.

4781 4782 4783 4784
- Issue #1722344: threading._shutdown() is now called in Py_Finalize(), which
  fixes the problem of some exceptions being thrown at shutdown when the
  interpreter is killed. Patch by Adam Olsen.

4785
- Issue #7147: Remove support for compiling Python without complex number
4786 4787
  support.

4788 4789
- Issue #7120: logging: Removed import of multiprocessing which is causing crash
  in GAE.
4790

4791 4792 4793
- Issue #1754094: Improve the stack depth calculation in the compiler.  There
  should be no other effect than a small decrease in memory use.  Patch by
  Christopher Tur Lesniewski-Laas.
4794

4795 4796
- Issue #7065: Fix a crash in bytes.maketrans and bytearray.maketrans when using
  byte values greater than 127.  Patch by Derk Drukker.
4797

4798 4799 4800 4801 4802
- Issue #1571184: The Unicode database contains properties for more characters.
  The tables for code points representing numeric values, white spaces or line
  breaks are now generated from the official Unicode Character Database files,
  and include information from the Unihan.txt file.

4803 4804
- Issue #7019: Raise ValueError when unmarshalling bad long data, instead of
  producing internally inconsistent Python longs.
4805

4806 4807
- Issue #6990: Fix threading.local subclasses leaving old state around after a
  reference cycle GC which could be recycled by new locals.
4808

4809 4810
- Issue #5460: Fix an ambiguity in the grammar.

4811 4812
- Issue #1766304: Improve performance of membership tests on range objects.

4813 4814
- Issue #6713: Improve performance of integer -> string conversions.

4815 4816
- Issue #6846: Fix bug where bytearray.pop() returns negative integers.

4817 4818
- Issue #6750: A text file opened with io.open() could duplicate its output when
  writing from multiple threads at the same time.
4819

4820 4821
- Issue #6707: dir() on an uninitialized module caused a crash.

4822 4823
- Issue #6540: Fixed crash for bytearray.translate() with invalid parameters.

4824 4825 4826
- Issue #6573: set.union() stopped processing inputs if an instance of self
  occurred in the argument chain.

4827 4828
- Issue #6070: On posix platforms import no longer copies the execute bit from
  the .py file to the .pyc file if it is set.
4829

4830 4831
- Issue #1616979: Added the cp720 (Arabic DOS) encoding.

4832 4833
- Issue #6428: Since Python 3.0, the __bool__ method must return a bool object,
  and not an int.  Fix the corresponding error message, and the documentation.
4834

Benjamin Peterson's avatar
Benjamin Peterson committed
4835 4836
- The deprecated PyCObject has been removed.

4837 4838 4839
- Issue #6347: Include inttypes.h as well as stdint.h in pyport.h.  This fixes a
  build failure on HP-UX: int32_t and uint32_t are defined in inttypes.h instead
  of stdint.h on that platform.
4840

4841 4842
- Issue #6373: Fixed a SystemError when encoding with the latin-1 codec and the
  'surrogateescape' error handler, a string which contains unpaired surrogates.
4843

4844 4845
- Issue #4856: Remove checks for win NT.

4846 4847
- Issue #6687: PyBytes_FromObject() no longer accepts an integer as its argument
  to construct a null-initialized bytes object.
4848

4849 4850
- Issue #1023290: Add from_bytes() and to_bytes() methods to integers.  These
  methods allow the conversion of integers to bytes, and vice-versa.
4851

4852 4853 4854
- Issue #7382: Fix bug in bytes.__getnewargs__ that prevented bytes instances
  from being copied with copy.copy(), and bytes subclasses from being pickled
  properly.
4855

4856 4857
- Code objects now support weak references.

4858
- Issue #7072: isspace(0xa0) is true on Mac OS X.
4859

4860
- Issue #8084: PEP 370 now conforms to system conventions for framework builds
4861 4862
  on MacOS X. That is, "python setup.py install --user" will install into
  "~/Library/Python/2.7" instead of "~/.local".
4863

4864 4865 4866
C-API
-----

4867 4868 4869 4870
- Issue #2443: A new macro, `Py_VA_COPY`, copies the state of the
  variable argument list.  `Py_VA_COPY` is equivalent to C99
  `va_copy`, but available on all python platforms.

4871 4872 4873 4874
- PySlice_GetIndicesEx now clips the step to [-PY_SSIZE_T_MAX, PY_SSIZE_T_MAX]
  instead of [-PY_SSIZE_T_MAX-1, PY_SSIZE_T_MAX].  This makes it safe to do
  "step = -step" when reversing a slice.

4875 4876 4877
- Issue #5753: A new C API function, `PySys_SetArgvEx`, allows embedders of the
  interpreter to set sys.argv without also modifying sys.path.  This helps fix
  `CVE-2008-5983
4878 4879
  <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5983>`_.

4880 4881 4882
- Add PyArg_ValidateKeywordArguments, which checks if all keyword arguments are
  strings in an efficient manner.

4883
- Issue #8276: PyEval_CallObject() is now only available in macro form.  The
4884 4885
  function declaration, which was kept for backwards compatibility reasons, is
  now removed (the macro was introduced in 1997!).
4886

4887 4888
- Issue #7767: New function PyLong_AsLongLongAndOverflow added, analogous to
  PyLong_AsLongAndOverflow.
4889

4890 4891 4892
- Make PyUnicode_CompareWithASCIIString return not equal if the Python string
  has '\0' at the end.

4893
- Issue #5080: The argument parsing functions PyArg_ParseTuple,
4894 4895 4896
  PyArg_ParseTupleAndKeywords, PyArg_VaParse, PyArg_VaParseTupleAndKeywords and
  PyArg_Parse now raise a DeprecationWarning for float arguments passed with the
  'L' format code.  This will become a TypeError in a future version of Python,
4897 4898
  to match the behaviour of the other integer format codes.

4899
- Issue #7033: Function ``PyErr_NewExceptionWithDoc()`` added.
4900

4901 4902
- Issue #7414: 'C' code wasn't being skipped properly (for keyword arguments) in
  PyArg_ParseTupleAndKeywords.
4903

4904 4905
- Issue #7228: Add '%lld' and '%llu' support to PyString_FromFormat(V) and
  PyErr_Format, on machines with HAVE_LONG_LONG defined.
4906

4907 4908 4909
- Issue #6151: Made PyDescr_COMMON conform to standard C (like PyObject_HEAD in
  PEP 3123).  The PyDescr_TYPE and PyDescr_NAME macros should be should used for
  accessing the d_type and d_name members of structures using PyDescr_COMMON.
4910 4911

- Issue #6405: Remove duplicate type declarations in descrobject.h.
4912

4913 4914
- The code flags for old __future__ features are now available again.

4915 4916 4917 4918 4919 4920 4921 4922 4923
- Issue #5954: Add a PyFrame_GetLineNumber() function to replace most uses of
  PyCode_Addr2Line().

- Issue #5959: Add a PyCode_NewEmpty() function to create a new empty code
  object at a specified file, function, and line number.

- Issue #1419652: Change the first argument to PyImport_AppendInittab() to
  ``const char *`` as the string is stored beyond the call.

4924 4925 4926 4927
- Issue #2422: When compiled with the ``--with-valgrind`` option, the pymalloc
  allocator will be automatically disabled when running under Valgrind.  This
  gives improved memory leak detection when running under Valgrind, while taking
  advantage of pymalloc at other times.
4928

Benjamin Peterson's avatar
Benjamin Peterson committed
4929 4930
Library
-------
4931

4932 4933
- In pdb, when Ctrl-C is entered while defining commands for a breakpoint, the
  old commands are restored.
4934

4935 4936 4937
- For traceback debugging, the pdb listing now also shows the locations where
  the exception was originally (re)raised, if it differs from the last line
  executed (e.g. in case of finally clauses).
4938

4939 4940
- The pdb command "source" has been added.  It displays the source code for a
  given object, if possible.
4941

4942 4943
- The pdb command "longlist" has been added.  It displays the whole source code
  for the current function.
4944

4945 4946
- Issue #1503502: Make pdb.Pdb easier to subclass by putting message and error
  output into methods.
4947

4948 4949
- Issue #809887: Make the output of pdb's breakpoint deletions more consistent;
  emit a message when a breakpoint is enabled or disabled.
4950

4951 4952
- Issue #5294: Fix the behavior of pdb's "continue" command when called in the
  top-level debugged frame.
4953

4954 4955
- Issue #5727: Restore the ability to use readline when calling into pdb in
  doctests.
4956

4957 4958
- Issue #6719: In pdb, do not stop somewhere in the encodings machinery if the
  source file to be debugged is in a non-builtin encoding.
4959

4960 4961
- Issue #8048: Prevent doctests from failing when sys.displayhook has been
  reassigned.
4962

4963 4964
- Issue #8015: In pdb, do not crash when an empty line is entered as a
  breakpoint command.
4965

4966 4967
- In pdb, allow giving a line number to the "until" command.

4968 4969 4970
- Issue #1437051: For pdb, allow "continue" and related commands in .pdbrc
  files.  Also, add a command-line option "-c" that runs a command as if given
  in .pdbrc.
4971

4972 4973
- Issue #4179: In pdb, allow "list ." as a command to return to the currently
  debugged line.
4974

4975
- Issue #4108: In urllib.robotparser, if there are multiple ``User-agent: *``
4976 4977
  entries, consider the first one.

4978 4979 4980
- Issue #6630: Allow customizing regex flags when subclassing the
  string.Template class.

4981 4982
- Issue #9411: Allow specifying an encoding for config files in the configparser
  module.
4983

4984 4985
- Issue #1682942: Improvements to configparser: support alternate delimiters,
  alternate comment prefixes and empty lines in values.
4986

4987 4988
- Issue #9354: Provide getsockopt() in asyncore's file_wrapper.

4989 4990
- Issue #8966: ctypes: Remove implicit bytes-unicode conversion.

4991 4992
- Issue #9378: python -m pickle <pickle file> will now load and display the
  first object in the pickle file.
4993

4994
- Issue #4770: Restrict binascii module to accept only bytes (as specified).
4995 4996
  And fix the email package to encode to ASCII instead of ``raw-unicode-escape``
  before ASCII-to-binary decoding.
4997

4998
- Issue #9384: ``python -m tkinter`` will now display a simple demo applet.
4999

5000 5001
- The default size of the re module's compiled regular expression cache has been
  increased from 100 to 500 and the cache replacement policy has changed from
Antoine Pitrou's avatar
Antoine Pitrou committed
5002 5003
  simply clearing the entire cache on overflow to forgetting the least recently
  used cached compiled regular expressions.  This is a performance win for
5004 5005
  applications that use a lot of regular expressions and limits the impact of
  the performance hit anytime the cache is exceeded.
5006

5007 5008
- Issue #7113: Speed up loading in configparser. Patch by Łukasz Langa.

5009
- Issue #9032: XML-RPC client retries the request on EPIPE error.  The EPIPE
5010 5011 5012
  error occurs when the server closes the socket and the client sends a big
  XML-RPC request.

5013 5014 5015
- Issue #4629: getopt raises an error if an argument ends with "=", whereas
  getopt doesn't accept a value (eg. --help= is rejected if getopt uses
  ['help='] long options).
5016

5017 5018 5019 5020 5021 5022
- Issue #7989: Added pure python implementation of the `datetime` module.  The C
  module is renamed to `_datetime` and if available, overrides all classes
  defined in datetime with fast C impementation.  Python implementation is based
  on the original python prototype for the datetime module by Tim Peters with
  minor modifications by the PyPy project.  The test suite now tests `datetime`
  module with and without `_datetime` acceleration using the same test cases.
5023

5024
- Issue #7895: platform.mac_ver() no longer crashes after calling os.fork().
5025

5026 5027
- Issue #9323: Fixed a bug in trace.py that resulted in loosing the name of the
  script being traced.  Patch by Eli Bendersky.
5028

5029 5030
- Issue #9282: Fixed --listfuncs option of trace.py.  Thanks Eli Bendersky for
  the patch.
5031

5032 5033 5034
- Issue #3704: http.cookiejar was not properly handling URLs with a / in the
  parameters.

5035 5036
- Issue #9268: ``pickletools.dis()`` now has an optional *annotate* argument
  which controls printing of opcode descriptions in ``dis()`` output.
5037

5038 5039
- Issue #1555570: email no longer inserts extra blank lines when a \r\n combo
  crosses an 8192 byte boundary.
5040

5041 5042
- Issue #9243: Fix sndhdr module and add unit tests, contributed by James Lee.

Benjamin Peterson's avatar
Benjamin Peterson committed
5043 5044
- ``ast.literal_eval()`` now allows byte literals.

5045 5046
- Issue #9137: Fix issue in MutableMapping.update, which incorrectly treated
  keyword arguments called 'self' or 'other' specially.
5047

5048 5049 5050
- ``ast.literal_eval()`` now allows set literals.

- Issue #9164: Ensure that sysconfig handles duplicate -arch flags in CFLAGS.
Ronald Oussoren's avatar
Ronald Oussoren committed
5051

5052 5053
- Issue #7646: The fnmatch pattern cache no longer grows without bound.

5054 5055 5056
- Issue #9136: Fix 'dictionary changed size during iteration' RuntimeError
  produced when profiling the decimal module.  This was due to a dangerous
  iteration over 'locals()' in Context.__init__.
5057

5058 5059 5060
- Fix extreme speed issue in Decimal.pow when the base is an exact power of 10
  and the exponent is tiny (for example, ``Decimal(10) **
  Decimal('1e-999999999')``).
5061

5062 5063
- Issue #9186: Fix math.log1p(-1.0) to raise ValueError, not OverflowError.

5064 5065
- Issue #9130: Fix validation of relative imports in parser module.

5066 5067
- Issue #9128: Fix validation of class decorators in parser module.

5068 5069 5070
- Issue #9094: python -m pickletools will now disassemble pickle files listed in
  the command line arguments.  See output of python -m pickletools -h for more
  details.
5071

5072 5073 5074
- Issue #5468: urlencode to handle bytes type and other encodings in its query
  parameter. Patch by Dan Mahn.

5075 5076
- Issue #7673: Fix security vulnerability (CVE-2010-2089) in the audioop module,
  ensure that the input string length is a multiple of the frame size.
5077

5078 5079
- Issue #6507: Accept source strings in dis.dis().  Original patch by Daniel
  Urban.
5080

5081 5082 5083
- Issue #7829: Clearly document that the dis module is exposing an
  implementation detail that is not stable between Python VMs or releases.

5084
- Issue #6589: cleanup asyncore.socket_map in case smtpd.SMTPServer constructor
5085 5086
  raises an exception.

5087
- Issue #9110: Addition of ContextDecorator to contextlib, for creating APIs
5088 5089
  that act as both context managers and decorators. contextmanager changes to
  use ContextDecorator.
5090

5091 5092 5093
- Implement importlib.abc.SourceLoader and deprecate PyLoader and PyPycLoader
  for removal in Python 3.4.

5094 5095
- Issue #9064: pdb's "up" and "down" commands now accept an optional argument
  giving the number of frames to go.
5096

5097 5098
- Issue #9018: os.path.normcase() now raises a TypeError if the argument is not
  ``str`` or ``bytes``.
5099

5100 5101
- Issue #9075: In the ssl module, remove the setting of a ``debug`` flag on an
  OpenSSL structure.
5102

5103 5104
- Issue #8682: The ssl module now temporary increments the reference count of a
  socket object got through ``PyWeakref_GetObject``, so as to avoid possible
5105 5106
  deallocation while the object is still being used.

5107
- Issue #1368368: FancyURLOpener class changed to throw an Exception on wrong
5108
  password instead of presenting an interactive prompt.  Older behavior can be
5109 5110
  obtained by passing retry=True to http_error_xxx methods of FancyURLOpener.

5111
- Issue #8720: Fix regression caused by fix for #4050 by making getsourcefile
5112 5113
  smart enough to find source files in the linecache.

5114 5115
- Issue #5610: feedparser no longer eats extra characters at the end of a body
  part if the body part ends with a ``\r\n``.
5116

5117 5118
- Issue #8986: math.erfc was incorrectly raising OverflowError for values
  between -27.3 and -30.0 on some platforms.
5119

5120 5121
- Issue #8784: Set tarfile default encoding to 'utf-8' on Windows.

5122 5123 5124
- Issue #8966: If a ctypes structure field is an array of c_char, convert its
  value to bytes instead of str (as done for c_char and c_char_p).

5125 5126 5127 5128 5129
- Issue #8188: Comparisons between Decimal and Fraction objects are now
  permitted, returning a result based on the exact numerical values of the
  operands.  This builds on issue #2531, which allowed Decimal-to-float
  comparisons; all comparisons involving numeric types (bool, int, float,
  complex, Decimal, Fraction) should now act as expected.
5130

5131 5132
- Issue #8897: Fix sunau module, use bytes to write the header. Patch written by
  Thomas Jollans.
5133

Raymond Hettinger's avatar
Nits  
Raymond Hettinger committed
5134
- Issue #8899: time.struct_time now has class and attribute docstrings.
5135

5136 5137
- Issue #6470: Drop UNC prefix in FixTk.

5138 5139
- Issue #4768: base64 encoded email body parts were incorrectly stored as binary
  strings.  They are now correctly converted to strings.
5140

5141 5142 5143
- Issue #8833: tarfile created hard link entries with a size field != 0 by
  mistake.

5144 5145
- Charset.body_encode now correctly handles base64 encoding by encoding with the
  output_charset before calling base64mime.encode.  Passes the tests from 2.x
5146
  issue #1368247.
5147

5148 5149 5150
- Issue #8845: sqlite3 Connection objects now have a read-only in_transaction
  attribute that is True iff there are uncommitted changes.

5151 5152 5153
- Issue #1289118: datetime.timedelta objects can now be multiplied by float and
  divided by float and int objects.  Results are rounded to the nearest multiple
  of timedelta.resolution with ties resolved using round-half-to-even method.
5154

5155 5156 5157
- Issue #7150: Raise OverflowError if the result of adding or subtracting
  timedelta from date or datetime falls outside of the MINYEAR:MAXYEAR range.

5158 5159
- Issue #8806: add SSL contexts support to ftplib.

5160 5161
- Issue #4769: Fix main() function of the base64 module, use sys.stdin.buffer
  and sys.stdout.buffer (instead of sys.stdin and sys.stdout) to use the bytes
5162
  API.
5163

5164 5165
- Issue #8770: Now sysconfig displays information when it's called as a script.
  Initial idea by Sridhar Ratnakumar.
5166

5167
- Issue #6662: Fix parsing of malformatted charref (&#bad;), patch written by
5168
  Fredrik Håård.
5169

5170
- Issue #8540: Decimal module: rename the Context._clamp attribute to
5171 5172
  Context.clamp and make it public.  This is useful in creating contexts that
  correspond to the decimal interchange formats specified in IEEE 754.
5173

5174 5175 5176
- Issue #6268: Fix seek() method of codecs.open(), don't read or write the BOM
  twice after seek(0). Fix also reset() method of codecs, UTF-16, UTF-32 and
  StreamWriter classes.
5177

5178
- Issue #3798: sys.exit(message) writes the message to sys.stderr file, instead
5179
  of the C file stderr, to use stderr encoding and error handler.
5180

5181 5182 5183
- Issue #8782: Add a trailing newline in linecache.updatecache to the last line
  of files without one.

5184 5185 5186
- Issue #8729: Return NotImplemented from collections.Mapping.__eq__ when
  comparing to a non-mapping.

5187
- Issue #8774: tabnanny uses the encoding cookie (#coding:...) to use the
5188
  correct encoding.
5189

5190 5191 5192
- Issue #4870: Add an `options` attribute to SSL contexts, as well as several
  ``OP_*`` constants to the `ssl` module.  This allows to selectively disable
  protocol versions, when used in combination with `PROTOCOL_SSLv23`.
5193

5194 5195
- Issue #8759: Fixed user paths in sysconfig for posix and os2 schemes.

5196 5197 5198 5199
- Issue #8663: distutils.log emulates backslashreplace error handler. Fix
  compilation in a non-ASCII directory if stdout encoding is ASCII (eg. if
  stdout is not a TTY).

5200 5201 5202 5203 5204
- Issue #8513: os.get_exec_path() supports b'PATH' key and bytes value.
  subprocess.Popen() and os._execvpe() support bytes program name. Add
  os.supports_bytes_environ flag: True if the native OS type of the environment
  is bytes (eg. False on Windows).

5205 5206 5207
- Issue #8633: tarfile is now able to read and write archives with "raw" binary
  pax headers as described in POSIX.1-2008.

5208 5209 5210
- Issue #1285086: Speed up urllib.parse functions: quote, quote_from_bytes,
  unquote, unquote_to_bytes.

5211 5212
- Issue #8688: Distutils now recalculates MANIFEST everytime.

5213
- Issue #8477: ssl.RAND_egd() and ssl._test_decode_cert() support str with
5214
  surrogates and bytes for the filename.
5215

5216 5217
- Issue #8550: Add first class ``SSLContext`` objects to the ssl module.

5218 5219
- Issue #8681: Make the zlib module's error messages more informative when the
  zlib itself doesn't give any detailed explanation.
5220

5221 5222
- The audioop module now supports sound fragments of length greater than 2**31
  bytes on 64-bit machines, and is PY_SSIZE_T_CLEAN.
5223

5224 5225 5226
- Issue #4972: Add support for the context manager protocol to the ftplib.FTP
  class.

Benjamin Peterson's avatar
Benjamin Peterson committed
5227 5228 5229
- Issue #8664: In py_compile, create __pycache__ when the compiled path is
  given.

5230 5231 5232
- Issue #8514: Add os.fsencode() function (Unix only): encode a string to bytes
  for use in the file system, environment variables or the command line.

5233 5234
- Issue #8571: Fix an internal error when compressing or decompressing a chunk
  larger than 1GB with the zlib module's compressor and decompressor objects.
5235

Benjamin Peterson's avatar
Benjamin Peterson committed
5236 5237 5238 5239
- Issue #8603: Support bytes environmental variables on Unix: Add os.environb
  mapping and os.getenvb() function. os.unsetenv() encodes str argument to the
  file system encoding with the surrogateescape error handler (instead of
  utf8/strict) and accepts bytes. posix.environ keys and values are now bytes.
5240

5241 5242
- Issue #8573: asyncore _strerror() function might throw ValueError.

5243 5244 5245 5246
- Issue #8483: asyncore.dispatcher's __getattr__ method produced confusing error
  messages when accessing undefined class attributes because of the cheap
  inheritance with the underlying socket object.  The cheap inheritance has been
  deprecated.
5247

5248 5249 5250
- Issue #4265: shutil.copyfile() was leaking file descriptors when disk fills.
  Patch by Tres Seaver.

5251
- Issue #8390: tarfile uses surrogateescape as the default error handler
5252
  (instead of replace in read mode or strict in write mode).
5253

5254 5255
- Issue #7755: Use an unencumbered audio file for tests.

5256 5257
- Issue #8621: uuid.uuid4() returned the same sequence of values in the parent
  and any children created using ``os.fork`` on MacOS X 10.6.
5258

5259 5260 5261 5262 5263
- Issue #8567: Fix precedence of signals in Decimal module: when a Decimal
  operation raises multiple signals and more than one of those signals is
  trapped, the specification determines the order in which the signals should be
  handled.  In many cases this order wasn't being followed, leading to the wrong
  Python exception being raised.
5264

5265
- Issue #7865: The close() method of :mod:`io` objects should not swallow
5266 5267
  exceptions raised by the implicit flush().  Also qensure that calling close()
  several times is supported.  Patch by Pascal Chambon.
5268

5269 5270 5271
- Issue #4687: Fix accuracy of garbage collection runtimes displayed with
  gc.DEBUG_STATS.

5272 5273
- Issue #8354: The siginterrupt setting is now preserved for all signals, not
  just SIGCHLD.
5274

5275
- Issue #7192: webbrowser.get("firefox") now works on Mac OS X, as does
5276 5277
  webbrowser.get("safari").

5278 5279
- Issue #8464: tarfile no longer creates files with execute permissions set when
  mode="w|" is used.
5280

5281 5282
- Issue #7834: Fix connect() of Bluetooth L2CAP sockets with recent versions of
  the Linux kernel.  Patch by Yaniv Aknin.
5283

5284 5285
- Issue #8295: Added shutil.unpack_archive.

5286 5287 5288
- Issue #6312: Fixed http HEAD request when the transfer encoding is chunked.
  It should correctly return an empty response now.

5289 5290
- Issue #8546: Reject None given as the buffering argument to _pyio.open.

5291 5292 5293
- Issue #8549: Fix compiling the _ssl extension under AIX.  Patch by
  Sridhar Ratnakumar.

5294 5295 5296
- Issue #6656: fix locale.format_string to handle escaped percents
  and mappings.

5297 5298 5299 5300
- Issue #2302: Fix a race condition in SocketServer.BaseServer.shutdown, where
  the method could block indefinitely if called just before the event loop
  started running.  This also fixes the occasional freezes witnessed in
  test_httpservers.
5301

5302 5303 5304
- Issue #8524: When creating an SSL socket, the timeout value of the original
  socket wasn't retained (instead, a socket with a positive timeout would be
  turned into a non-blocking SSL socket).
5305

5306 5307 5308
- Issue #5103: SSL handshake would ignore the socket timeout and block
  indefinitely if the other end didn't respond.

5309 5310
- The do_handshake() method of SSL objects now adjusts the blocking mode of the
  SSL structure if necessary (as other methods already do).
5311

5312 5313
- Issue #8391: os.execvpe() and os.getenv() supports unicode with surrogates and
  bytes strings for environment keys and values.
5314

5315 5316
- Issue #8467: Pure Python implementation of subprocess encodes the error
  message using surrogatepass error handler to support surrogates in the
5317
  message.
5318

5319
- Issue #8468: bz2.BZ2File() accepts str with surrogates and bytes filenames.
5320

5321 5322 5323
- Issue #8451: Syslog module now uses basename(sys.argv[0]) instead of the
  string "python" as the *ident*.  openlog() arguments are all optional and
  keywords.
5324

5325 5326
- Issue #8108: Fix the unwrap() method of SSL objects when the socket has a
  non-infinite timeout.  Also make that method friendlier with applications
5327 5328 5329
  wanting to continue using the socket in clear-text mode, by disabling
  OpenSSL's internal readahead.  Thanks to Darryl Miles for guidance.

5330 5331 5332
- Issue #8496: make mailcap.lookup() always return a list, rather than an
  iterator.  Patch by Gregory Nofi.

5333 5334 5335
- Issue #8195: Fix a crash in sqlite Connection.create_collation() if the
  collation name contains a surrogate character.

5336 5337 5338
- Issue #8484: Load all ciphers and digest algorithms when initializing the _ssl
  extension, such that verification of some SSL certificates doesn't fail
  because of an "unknown algorithm".
5339

5340 5341
- Issue #6547: Added the ignore_dangling_symlinks option to shutil.copytree.

5342
- Issue #1540112: Now allowing the choice of a copy function in shutil.copytree.
5343

5344 5345 5346
- Issue #4814: timeout parameter is now applied also for connections resulting
  from PORT/EPRT commands.

5347 5348
- Issue #8463: added missing reference to bztar in shutil's documentation.

5349 5350
- Issue #7154: urllib.request can now detect the proxy settings on OSX 10.6 (as
  long as the user didn't specify 'automatic proxy configuration').
5351

5352 5353
- Issue #3817: ftplib.FTP.abort() method now considers 225 a valid response code
  as stated in RFC-959 at chapter 5.4.
5354

5355 5356 5357
- Issue #8394: _ctypes.dlopen() accepts bytes, bytearray and str with
  surrogates.

5358
- Issue #850728: Add a *timeout* parameter to the `acquire()` method of
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Antoine Pitrou committed
5359
  `threading.Semaphore` objects.  Original patch by Torsten Landschoff.
5360

5361 5362 5363
- Issue #8322: Add a *ciphers* argument to SSL sockets, so as to change the
  available cipher list.  Helps fix test_ssl with OpenSSL 1.0.0.

5364 5365 5366
- Issue #8393: subprocess accepts bytes, bytearray and str with surrogates for
  the current working directory.

5367
- Issue #7606: XML-RPC traceback stored in X-traceback is now encoded to ASCII
5368
  using backslashreplace error handler.
5369

5370
- Issue #8412: os.system() now accepts bytes, bytearray and str with surrogates.
5371

5372 5373 5374
- Issue #2987: RFC2732 support for urlparse (IPv6 addresses). Patch by Tony
  Locke and Hans Ulrich Niedermann.

5375 5376
- Issue #5277: Fix quote counting when parsing RFC 2231 encoded parameters.

5377
- Issue #7316: The acquire() method of lock objects in the :mod:`threading`
5378
  module now takes an optional timeout argument in seconds.  Timeout support
5379
  relies on the system threading library, so as to avoid a semi-busy wait loop.
5380

5381 5382
- Issue #8383: pickle and pickletools use surrogatepass error handler when
  encoding unicode as utf8 to support lone surrogates and stay compatible with
5383
  Python 2.x and 3.x.
5384

5385
- Issue #7585: difflib context and unified diffs now place a tab between
5386 5387
  filename and date, conforming to the 'standards' they were originally designed
  to follow.  This improves compatibility with patch tools.
5388

5389
- Issue #7472: Fixed typo in email.encoders module; messages using ISO-2022
5390 5391
  character sets will now consistently use a Content-Transfer-Encoding of 7bit
  rather than sometimes being marked as 8bit.
5392

5393 5394 5395
- Issue #8375: test_distutils now checks if the temporary directory are still
  present before it cleans them.

5396 5397
- Issue #8374: Update the internal alias table in the :mod:`locale` module to
  cover recent locale changes and additions.
5398

5399
- Issue #8321: Give access to OpenSSL version numbers from the `ssl` module,
5400 5401
  using the new attributes `ssl.OPENSSL_VERSION`, `ssl.OPENSSL_VERSION_INFO` and
  `ssl.OPENSSL_VERSION_NUMBER`.
5402

5403 5404
- Add functools.total_ordering() and functools.cmp_to_key().

5405 5406
- Issue #8257: The Decimal construct now accepts a float instance directly,
  converting that float to a Decimal of equal value:
5407 5408 5409 5410

     >>> Decimal(1.1)
     Decimal('1.100000000000000088817841970012523233890533447265625')

5411 5412
- Issue #8294: The Fraction constructor now accepts Decimal and float instances
  directly.
5413

5414 5415 5416 5417
- Issue #7279: Comparisons involving a Decimal signaling NaN now signal
  InvalidOperation instead of returning False.  (Comparisons involving a quiet
  NaN are unchanged.)  Also, Decimal quiet NaNs are now hashable; Decimal
  signaling NaNs remain unhashable.
5418

5419 5420 5421 5422 5423
- Issue #2531: Comparison operations between floats and Decimal instances now
  return a result based on the numeric values of the operands; previously they
  returned an arbitrary result based on the relative ordering of id(float) and
  id(Decimal).  See also issue #8188, which adds Decimal-to-Fraction
  comparisons.
5424

5425 5426
- Added a subtract() method to collections.Counter().

5427
- Issue #8233: When run as a script, py_compile.py optionally takes a single
5428 5429 5430
  argument `-` which tells it to read files to compile from stdin.  Each line is
  read on demand and the named file is compiled immediately.  (Original patch by
  Piotr Ożarowski).
5431

5432 5433
- Backwards incompatible change: Unicode codepoints line tabulation (0x0B) and
  form feed (0x0C) are now considered linebreaks, as specified in Unicode
5434
  Standard Annex #14.  See issue #7643.  http://www.unicode.org/reports/tr14/
5435

5436 5437 5438 5439
- Comparisons using one of <, <=, >, >= between a complex instance and a
  Fractions instance now raise TypeError instead of returning True/False.  This
  makes Fraction <=> complex comparisons consistent with int <=> complex, float
  <=> complex, and complex <=> complex comparisons.
5440

5441 5442 5443
- Issue #8139: ossaudiodev didn't initialize its types properly, therefore some
  methods (such as oss_mixer_device.fileno()) were not available.  Initial patch
  by Bertrand Janin.
5444

5445 5446 5447
- Issue #8205: Remove the "Modules" directory from sys.path when Python is
  running from the build directory (POSIX only).

5448
- Issue #7512: shutil.copystat() could raise an OSError when the filesystem
5449 5450
  didn't support chflags() (for example ZFS under FreeBSD).  The error is now
  silenced.
5451

5452 5453
- Issue #7860: platform.uname now reports the correct 'machine' type when Python
  is running in WOW64 mode on 64 bit Windows.
5454

Antoine Pitrou's avatar
Antoine Pitrou committed
5455 5456 5457
- Issue #3890, #8222: Fix recv() and recv_into() on non-blocking SSL sockets.
  Also, enable the SSL_MODE_AUTO_RETRY flag on SSL sockets, so that blocking
  reads and writes are always retried by OpenSSL itself.
5458

5459 5460 5461 5462
- Issue #4282: Fix the main function of the profile module for a non-ASCII
  script, open the file in binary mode and not in text mode with the default
  (utf8) encoding.

5463 5464
- Issue #8179: Fix macpath.realpath() on a non-existing path.

5465 5466
- Issue #8024: Update the Unicode database to 5.2.

5467 5468
- Issue #8168: py_compile now handles files with utf-8 BOMS.

5469 5470 5471
- ``tokenize.detect_encoding`` now returns ``'utf-8-sig'`` when a UTF-8 BOM is
  detected.

5472 5473
- Issue #6716/2: Backslash-replace error output in compilall.

5474 5475 5476
- Issue #4961: Inconsistent/wrong result of askyesno function in tkMessageBox
  with Tcl/Tk-8.5.

5477
- Issue #8140: extend compileall to compile single files.  Add -i option.
5478

5479 5480
- Issue #7356: ctypes.util: Make parsing of ldconfig output independent of the
  locale.
5481

5482 5483 5484
- The internals of the subprocess module on POSIX systems have been replaced by
  an extension module (_posixsubprocess) so that the fork()+exec() can be done
  safely without the possibility of deadlock in multithreaded applications.
5485

5486 5487 5488 5489
- subprocess.Popen now has restore_signals and start_new_session features.  The
  default of restore_signals=True is a new behavior compared to earlier Python
  versions.  This means that signals such as SIGPIPE are not ignored by default
  in subprocesses launched by Python (Issue #1652).
5490

5491 5492 5493
- Issue #6472: The xml.etree package is updated to ElementTree 1.3.  The
  cElementTree module is updated too.

5494
- Issue #7774: Set sys.executable to an empty string if argv[0] has been set to
5495 5496
  an non existent program name and Python is unable to retrieve the real program
  name.
5497

5498 5499
- Issue #7880: Fix sysconfig when the python executable is a symbolic link.

5500 5501
- Issue #6509: fix re.sub to work properly when the pattern, the string, and the
  replacement were all bytes.  Patch by Antoine Pitrou.
5502

5503 5504 5505
- The sqlite3 module was updated to pysqlite 2.6.0. This fixes several obscure
  bugs and allows loading SQLite extensions from shared libraries.

5506 5507
- Issue #1054943: Fix ``unicodedata.normalize('NFC', text)`` for the Public
  Review Issue #29 (http://unicode.org/review/pr-29.html).
5508

5509 5510 5511
- Issue #7494: fix a crash in _lsprof (cProfile) after clearing the profiler,
  reset also the pointer to the current pointer context.

5512 5513 5514
- Issue #7232: Add support for the context manager protocol to the TarFile
  class.

5515 5516 5517
- Issue #7250: Fix info leak of os.environ across multi-run uses of
  wsgiref.handlers.CGIHandler.

5518 5519
- Issue #1729305: Fix doctest to handle encode error with "backslashreplace".

5520 5521 5522
- Issue #691291: codecs.open() should not convert end of lines on reading and
  writing.

5523 5524 5525 5526 5527 5528
- Issue #7869: logging: improved diagnostic for format-time errors.

- Issue #7868: logging: added loggerClass attribute to Manager.

- logging: Implemented PEP 391.

5529
- Issue #1537721: Add a writeheader() method to csv.DictWriter.
Benjamin Peterson's avatar
Benjamin Peterson committed
5530

5531 5532
- Issue #7959: ctypes callback functions are now registered correctly with the
  cycle garbage collector.
5533

5534 5535
- Issue #5801: removed spurious empty lines in wsgiref.

5536 5537
- Issue #6666: fix bug in trace.py that applied the list of directories to be
  ignored only to the first file.  Noted by Bogdan Opanchuk.
5538

5539 5540
- Issue #7597: curses.use_env() can now be called before initscr().  Noted by
  Kan-Ru Chen.
5541

5542 5543
- Issue #7310: fix the __repr__ of os.environ to show the environment variables.

5544 5545 5546
- Issue #7970: email.Generator.flatten now correctly flattens message/rfc822
  messages parsed by email.Parser.HeaderParser.

Brett Cannon's avatar
Brett Cannon committed
5547 5548 5549
- Issue #7361: Importlib was not properly checking the number of bytes in
  bytecode file when it was less then 8 bytes.

5550 5551 5552 5553
- Issue #7633: In the decimal module, Context class methods (with the exception
  of canonical and is_canonical) now accept instances of int and long wherever a
  Decimal instance is accepted, and implicitly convert that argument to Decimal.
  Previously only some arguments were converted.
5554

5555 5556 5557
- Issue #7835: shelve should no longer produce mysterious warnings during
  interpreter shutdown.

5558 5559 5560 5561
- Issue #2746: Don't escape ampersands and angle brackets ("&", "<", ">") in XML
  processing instructions and comments.  These raw characters are allowed by the
  XML specification, and are necessary when outputting e.g.  PHP code in a
  processing instruction.  Patch by Neil Muller.
5562

5563 5564 5565
- Issue #6233: ElementTree failed converting unicode characters to XML entities
  when they could't be represented in the requested output encoding.  Patch by
  Jerry Chen.
5566

5567 5568
- Issue #6003: add an argument to ``zipfile.Zipfile.writestr`` to specify the
  compression type.
5569

5570 5571
- Issue #4772: Raise a ValueError when an unknown Bluetooth protocol is
  specified, rather than fall through to AF_PACKET (in the `socket` module).
5572 5573
  Also, raise ValueError rather than TypeError when an unknown TIPC address type
  is specified.  Patch by Brian Curtin.
5574

5575 5576 5577
- Issue #6939: Fix file I/O objects in the `io` module to keep the original file
  position when calling `truncate()`.  It would previously change the file
  position to the given argument, which goes against the tradition of
5578 5579
  ftruncate() and other truncation APIs.  Patch by Pascal Chambon.

5580
- Issue #7610: Reworked implementation of the internal
5581 5582 5583 5584 5585
  :class:`zipfile.ZipExtFile` class used to represent files stored inside an
  archive.  The new implementation is significantly faster and can be wrapped in
  a :class:`io.BufferedReader` object for more speedups.  It also solves an
  issue where interleaved calls to `read()` and `readline()` give wrong results.
  Patch by Nir Aides.
5586

5587
- Issue #6963: Added "maxtasksperchild" argument to multiprocessing.Pool,
5588 5589
  allowing for a maximum number of tasks within the pool to be completed by the
  worker before that worker is terminated, and a new one created to replace it.
5590

5591 5592
- Issue #7792: Registering non-classes to ABCs raised an obscure error.

Benjamin Peterson's avatar
Benjamin Peterson committed
5593
- Issue #7785: Don't accept bytes in FileIO.write().
5594

5595 5596
- Removed the functions 'verify' and 'vereq' from Lib/test/support.py.

5597 5598 5599
- Issue #7773: Fix an UnboundLocalError in platform.linux_distribution() when
  the release file is empty.

5600 5601 5602
- Issue #7561: Fix crashes when using bytearray objects with the posix
  module.

5603 5604 5605
- Issue #1670765: Prevent email.generator.Generator from re-wrapping headers in
  multipart/signed MIME parts, which fixes one of the sources of invalid
  modifications to such parts by Generator.
5606

5607 5608
- Issue #7703: Add support for the new buffer API to `binascii.a2bhqx`.  Patch
  by Florent Xicluna, along with some additional tests.
5609

5610 5611
- Issue #7701: Fix crash in binascii.b2a_uu() in debug mode when given a 1-byte
  argument.  Patch by Victor Stinner.
5612

5613 5614
- Issue #3299: Fix possible crash in the _sre module when given bad argument
  values in debug mode.  Patch by Victor Stinner.
5615

5616 5617
- Issue #2846: Add support for gzip.GzipFile reading zero-padded files.  Patch
  by Brian Curtin.
5618

5619 5620
- Issue #7681: Use floor division in appropiate places in the wave module.

5621 5622 5623 5624
- Issue #5372: Drop the reuse of .o files in Distutils' ccompiler (since
  Extension extra options may change the output without changing the .c
  file). Initial patch by Collin Winter.

5625 5626
- Issue #7617: Make sure distutils.unixccompiler.UnixCCompiler recognizes gcc
  when it has a fully qualified configuration prefix. Initial patch by Arfrever.
5627

5628 5629
- Issue #7105: Make WeakKeyDictionary and WeakValueDictionary robust against the
  destruction of weakref'ed objects while iterating.
5630

5631 5632
- Issue #7455: Fix possible crash in cPickle on invalid input.  Patch by Victor
  Stinner.
5633

5634
- Issue #1628205: Socket file objects returned by socket.socket.makefile() now
5635 5636
  properly handles EINTR within the read, readline, write & flush methods.  The
  socket.sendall() method now properly handles interrupted system calls.
5637

5638 5639 5640
- Issue #7471: Improve the performance of GzipFile's buffering mechanism, and
  make it implement the `io.BufferedIOBase` ABC to allow for further speedups by
  wrapping it in an `io.BufferedReader`.  Patch by Nir Aides.
5641 5642

- Issue #3972: http.client.HTTPConnection now accepts an optional source_address
5643 5644 5645 5646
  parameter to allow specifying where your connections come from.

- socket.create_connection now accepts an optional source_address parameter.

5647 5648
- Issue #5511: now zipfile.ZipFile can be used as a context manager.  Initial
  patch by Brian Curtin.
5649

5650 5651 5652
- Issue #7556: Make sure Distutils' msvc9compile reads and writes the MSVC XML
  Manifest file in text mode so string patterns can be used in regular
  expressions.
5653

5654 5655 5656
- Issue #7552: Removed line feed in the base64 Authorization header in the
  Distutils upload command to avoid an error when PyPI reads it.  This occurs on
  long passwords. Initial patch by JP St. Pierre.
5657

5658 5659 5660
- Issue #7231: urllib2 cannot handle https with proxy requiring auth.  Patch by
  Tatsuhiro Tsujikawa.

5661 5662 5663
- Issue #4757: `zlib.compress` and other methods in the zlib module now raise a
  TypeError when given an `str` object (rather than a `bytes`-like object).
  Patch by Victor Stinner and Florent Xicluna.
5664

5665 5666 5667 5668
- Issue #7349: Make methods of file objects in the io module accept None as an
  argument where file-like objects (ie StringIO and BytesIO) accept them to mean
  the same as passing no argument.

5669
- Issue #7357: tarfile no longer suppresses fatal extraction errors by default.
5670

5671 5672
- Issue #5949: added check for correct lineends in input from IMAP server in
  imaplib.
5673

5674
- Add count() and reverse() methods to collections.deque().
5675

5676 5677
- Fix variations of extending deques:  d.extend(d)  d.extendleft(d)  d+=d

5678 5679
- Issue #6986: Fix crash in the JSON C accelerator when called with the wrong
  parameter types.  Patch by Victor Stinner.
5680

5681
- Issue #7457: added a read_pkg_file method to
5682 5683
  distutils.dist.DistributionMetadata.

5684 5685 5686
- logging: Added optional `secure` parameter to SMTPHandler, to enable use of
  TLS with authentication credentials.

5687 5688
- Issue #1923: Fixed the removal of meaningful spaces when PKG-INFO is generated
  in Distutils.  Patch by Stephen Emslie.
5689

5690 5691 5692
- Issue #4120: Drop reference to CRT from manifest when building extensions with
  msvc9compiler.

5693
- Issue #7333: The `posix` module gains an `initgroups()` function providing
5694 5695
  access to the initgroups(3) C library call on Unix systems which implement it.
  Patch by Jean-Paul Calderone.
5696

5697 5698 5699 5700
- Issue #7408: Fixed distutils.tests.sdist so it doesn't check for group
  ownership when the group is not forced, because the group may be different
  from the user's group and inherit from its container when the test is run.

5701
- Issue #4486: When an exception has an explicit cause, do not print its
5702 5703
  implicit context too.  This affects the `traceback` module as well as built-in
  exception printing.
5704

5705 5706
- Issue #1515: Enable use of deepcopy() with instance methods.  Patch by Robert
  Collins.
5707

5708 5709
- Issue #7403: logging: Fixed possible race condition in lock creation.

5710 5711 5712 5713
- Issue #6845: Add restart support for binary upload in ftplib.  The
  `storbinary()` method of FTP and FTP_TLS objects gains an optional `rest`
  argument.  Patch by Pablo Mouzo.

5714 5715 5716
- Issue #5788: `datetime.timedelta` objects get a new `total_seconds()` method
  returning the total number of seconds in the duration.  Patch by Brian
  Quinlan.
5717

5718 5719
- Issue #7133: SSL objects now support the new buffer API.

5720
- Issue #1488943: difflib.Differ() doesn't always add hints for tab characters.
5721

5722 5723 5724
- Issue #6123: tarfile now opens empty archives correctly and consistently
  raises ReadError on empty files.

5725
- Issue #7354: distutils.tests.test_msvc9compiler - dragfullwindows can be 2.
5726

Benjamin Peterson's avatar
Benjamin Peterson committed
5727 5728
- Issue #5037: Proxy the __bytes__ special method instead to __bytes__ instead
  of __str__.
5729

5730 5731
- Issue #7341: Close the internal file object in the TarFile constructor in case
  of an error.
5732

5733 5734 5735
- Issue #7293: distutils.test_msvc9compiler is fixed to work on any fresh
  Windows box. Help provided by David Bolen.

5736 5737
- Issue #2054: ftplib now provides an FTP_TLS class to do secure FTP using TLS
  or SSL.  Patch by Giampaolo Rodola'.
5738

5739
- Issue #7328: pydoc no longer corrupts sys.path when run with the '-m' switch.
5740

5741 5742
- Issue #4969: The mimetypes module now reads the MIME database from the
  registry under Windows.  Patch by Gabriel Genellina.
5743

5744 5745 5746 5747
- Issue #6816: runpy now provides a run_path function that allows Python code to
  execute file paths that refer to source or compiled Python files as well as
  zipfiles, directories and other valid sys.path entries that contain a
  __main__.py file.  This allows applications that run other Python scripts to
Nick Coghlan's avatar
Nick Coghlan committed
5748 5749
  support the same flexibility as the CPython command line itself.

5750 5751 5752
- Issue #7318: multiprocessing now uses a timeout when it fails to establish a
  connection with another process, rather than looping endlessly.  The default
  timeout is 20 seconds, which should be amply sufficient for local connections.
5753

5754
- Issue #7197: Allow unittest.TextTestRunner objects to be pickled and
5755
  unpickled.  This fixes crashes under Windows when trying to run
5756 5757
  test_multiprocessing in verbose mode.

5758 5759 5760
- Issue #7893: ``unittest.TextTestResult`` is made public and a ``resultclass``
  argument added to the TextTestRunner constructor allowing a different result
  class to be used without having to subclass.
5761

5762
- Issue #7588: ``unittest.TextTestResult.getDescription`` now includes the test
5763 5764
  name in failure reports even if the test has a docstring.

5765
- Issue #3001: Add a C implementation of recursive locks which is used by
5766 5767 5768
  default when instantiating a `threading.RLock` object. This makes recursive
  locks as fast as regular non-recursive locks (previously, they were slower by
  10x to 15x).
5769

5770 5771
- Issue #7282: Fix a memory leak when an RLock was used in a thread other than
  those started through `threading.Thread` (for example, using
5772 5773
  `_thread.start_new_thread()`).

5774 5775 5776
- Issue #7187: Importlib would not silence the IOError raised when trying to
  write new bytecode when it was made read-only.

5777 5778 5779
- Issue #7264: Fix a possible deadlock when deallocating thread-local objects
  which are part of a reference cycle.

5780 5781 5782
- Issue #7211: Allow 64-bit values for the `ident` and `data` fields of kevent
  objects on 64-bit systems.  Patch by Michael Broghton.

5783 5784 5785
- Issue #6896: mailbox.Maildir now invalidates its internal cache each time a
  modification is done through it.  This fixes inconsistencies and test failures
  on systems with slightly bogus mtime behaviour.
5786

5787 5788 5789 5790
- Issue #7246 & Issue #7208: getpass now properly flushes input before reading
  from stdin so that existing input does not confuse it and lead to incorrect
  entry or an IOError.  It also properly flushes it afterwards to avoid the
  terminal echoing the input afterwards on OSes such as Solaris.
5791

5792 5793 5794 5795
- Issue #7233: Fix a number of two-argument Decimal methods to make sure that
  they accept an int or long as the second argument.  Also fix buggy handling of
  large arguments (those with coefficient longer than the current precision) in
  shift and rotate.
5796

5797 5798 5799
- Issue #4750: Store the basename of the original filename in the gzip FNAME
  header as required by RFC 1952.

5800 5801 5802
- Issue #1180: Added a new global option to ignore ~/.pydistutils.cfg in
  Distutils.

5803 5804 5805
- Issue #7218: Fix test_site for win32, the directory comparison was done with
  an uppercase.

5806 5807 5808
- Issue #7205: Fix a possible deadlock when using a BZ2File object from
  several threads at once.

5809 5810
- Issue #7077: logging: SysLogHandler now treats Unicode as per RFC 5424.

5811 5812 5813
- Issue #7099: Decimal.is_normal now returns True for numbers with exponent
  larger than emax.

5814 5815 5816
- Issue #7080: locale.strxfrm() raises a MemoryError on 64-bit non-Windows
  platforms, and assorted locale fixes by Derk Drukker.

5817 5818
- Issue #5833: Fix extra space character in readline completion with the GNU
  readline library version 6.0.
5819

5820
- Issue #6894: Fixed the issue urllib2 doesn't respect "no_proxy" environment.
5821

5822 5823
- Issue #7086: Added TCP support to SysLogHandler, and tidied up some
  anachronisms in the code which were a relic of 1.5.2 compatibility.
5824

5825 5826
- Issue #7082: When falling back to the MIME 'name' parameter, the correct place
  to look for it is the Content-Type header.
5827

5828 5829 5830
- Make tokenize.detect_coding() normalize utf-8 and iso-8859-1 variants like the
  builtin tokenizer.

5831 5832
- Issue #7048: Force Decimal.logb to round its result when that result is too
  large to fit in the current precision.
5833

5834 5835
- Issue #6236, #6348: Fix various failures in the I/O library under AIX and
  other platforms, when using a non-gcc compiler. Patch by Derk Drukker.
5836

5837 5838
- Issue #4606: Passing 'None' if ctypes argtype is set to POINTER(...)  does now
  always result in NULL.
5839

5840 5841
- Issue #5042: Structure sub-subclass does now initialize correctly with base
  class positional arguments.
5842

5843 5844
- Issue #6882: Import uuid creates zombies processes.

5845 5846
- Issue #6635: Fix profiler printing usage message.

5847 5848
- Issue #6856: Add a filter keyword argument to TarFile.add().

5849 5850
- Issue #6888: pdb's alias command was broken when no arguments were given.

5851
- Issue #6857: Default format() alignment should be '>' for Decimal instances.
5852

5853 5854 5855
- Issue #6795: int(Decimal('nan')) now raises ValueError instead of returning
  NaN or raising InvalidContext.  Also, fix infinite recursion in
  long(Decimal('nan')).
5856

5857 5858
- Issue #6850: Fix bug in Decimal._parse_format_specifier for formats with no
  type specifier.
5859

5860 5861
- Issue #6239: ctypes.c_char_p return value must return bytes.

5862 5863 5864 5865
- Issue #6838: Use a list to accumulate the value instead of repeatedly
  concatenating strings in http.client's HTTPResponse._read_chunked providing a
  significant speed increase when downloading large files servend with a
  Transfer-Encoding of 'chunked'.
5866

5867 5868 5869
- Trying to import a submodule from a module that is not a package, ImportError
  should be raised, not AttributeError.

5870 5871 5872
- When the globals past to importlib.__import__() has __package__ set to None,
  fall back to computing what __package__ should be instead of giving up.

5873
- Raise a TypeError when the name of a module to be imported for
5874
  importlib.__import__ is not a string (was raising an AttributeError before).
5875

5876 5877
- Allow the fromlist passed into importlib.__import__ to be any iterable.

5878 5879
- Have importlib raise ImportError if None is found in sys.modules.

5880 5881
- Issue #6054: Do not normalize stored pathnames in tarfile.

5882 5883 5884
- Issue #6794: Fix Decimal.compare_total and Decimal.compare_total_mag: NaN
  payloads are now ordered by integer value rather than lexicographically.

5885 5886 5887 5888 5889 5890 5891 5892 5893
- Issue #1356969: Add missing info methods in tix.HList.

- Issue #1522587: New constants and methods for the tix.Grid widget.

- Issue #1250469: Fix the return value of tix.PanedWindow.panes.

- Issue #1119673: Do not override tkinter.Text methods when creating a
  ScrolledText.

5894 5895
- Issue #6665: Fix fnmatch to properly match filenames with newlines in them.

5896 5897
- Issue #1135: Add the XView and YView mix-ins to avoid duplicating the xview*
  and yview* methods.
5898

5899 5900 5901 5902 5903
- Issue #6629: Fix a data corruption issue in the new I/O library, which could
  occur when writing to a BufferedRandom object (e.g. a file opened in "rb+" or
  "wb+" mode) after having buffered a certain amount of data for reading. This
  bug was not present in the pure Python implementation.

5904 5905
- Issue #6622: Fix "local variable 'secret' referenced before assignment" bug in
  POP3.apop.
5906

5907 5908
- Issue #2715: Remove remnants of Carbon.File from binhex module.

5909 5910 5911
- Issue #6595: The Decimal constructor now allows arbitrary Unicode decimal
  digits in input, as recommended by the standard.  Previously it was restricted
  to accepting [0-9].
5912

5913 5914 5915
- Issue #6106: telnetlib.Telnet.process_rawq doesn't handle default WILL/WONT
  DO/DONT correctly.

5916
- Issue #1424152: Fix for http.client, urllib.request to support SSL while
5917 5918
  working through proxy.  Original patch by Christopher Li, changes made by
  Senthil Kumaran.
5919

5920
- Add importlib.abc.ExecutionLoader to represent the PEP 302 protocol for
5921 5922 5923
  loaders that allow for modules to be executed. Both importlib.abc.PyLoader and
  PyPycLoader inherit from this class and provide implementations in relation to
  other methods required by the ABCs.
5924

5925 5926 5927 5928
- importlib.abc.PyLoader did not inherit from importlib.abc.ResourceLoader like
  the documentation said it did even though the code in PyLoader relied on the
  abstract method required by ResourceLoader.

5929 5930 5931
- Issue #6431: Make Fraction type return NotImplemented when it doesn't know how
  to handle a comparison without loss of precision.  Also add correct handling
  of infinities and nans for comparisons with float.
5932

Antoine Pitrou's avatar
Antoine Pitrou committed
5933
- Issue #6415: Fixed warnings.warn segfault on bad formatted string.
5934

5935 5936
- Issue #6358: The exit status of a command started with os.popen() was reported
  differently than it did with python 2.x.
5937

5938 5939
- Issue #6323: The pdb debugger did not exit when running a script with a syntax
  error.
5940

5941 5942 5943
- Issue #3392: The subprocess communicate() method no longer fails in select()
  when file descriptors are large; communicate() now uses poll() when possible.

5944 5945
- Issue #6369: Fix an RLE decompression bug in the binhex module.

5946 5947
- Issue #6344: Fixed a crash of mmap.read() when passed a negative argument.

Benjamin Peterson's avatar
Benjamin Peterson committed
5948 5949
- The deprecated function string.maketrans has been removed.

5950 5951 5952
- Issue #4005: Fixed a crash of pydoc when there was a zip file present in
  sys.path.

5953 5954
- Issue #6218: io.StringIO and io.BytesIO instances are now picklable.

5955 5956
- The os.get_exec_path() function to return the list of directories that will be
  searched for an executable when launching a subprocess was added.
5957

5958 5959 5960
- Issue #7481: When a threading.Thread failed to start it would leave the
  instance stuck in initial state and present in threading.enumerate().

5961 5962
- Issue #1068268: The subprocess module now handles EINTR in internal os.waitpid
  and os.read system calls where appropriate.
5963

5964 5965
- Issue #6729: Added ctypes.c_ssize_t to represent ssize_t.

5966 5967
- Issue #6247: The argparse module has been added to the standard library.

5968 5969
- Issue #8235: _socket: Add the constant ``SO_SETFIB``.  SO_SETFIB is a socket
  option available on FreeBSD 7.1 and newer.
5970

5971 5972 5973
- Issue #9315: Fix for the trace module to record correct class name
  for tracing methods.

5974 5975
Extension Modules
-----------------
5976

5977 5978 5979
- Issue #9959: Tweak formula used for computing math.log of an integer,
  making it marginally more accurate for exact powers of 2.

5980 5981
- Issue #9422: Fix memory leak when re-initializing a struct.Struct object.

5982
- Issue #7900: The getgroups(2) system call on MacOSX behaves rather oddly
5983 5984 5985 5986
  compared to other unix systems. In particular, os.getgroups() does not reflect
  any changes made using os.setgroups() but basicly always returns the same
  information as the id command. os.getgroups() can now return more than 16
  groups on MacOSX.
5987

5988 5989
- Issue #6095: Make directory argument to os.listdir optional.

5990 5991 5992
- Issue #9277: Fix bug in struct.pack for bools in standard mode (e.g.,
  struct.pack('>?')): if conversion to bool raised an exception then that
  exception wasn't properly propagated on machines where char is unsigned.
Mark Dickinson's avatar
Mark Dickinson committed
5993

5994 5995
- Issue #5180: Fixed a bug that prevented loading 2.x pickles in 3.x python when
  they contain instances of old-style classes.
5996

5997 5998
- Issue #9165: Add new functions math.isfinite and cmath.isfinite, to accompany
  existing isinf and isnan functions.
5999

6000 6001
- Issue #1578269: Implement os.symlink for Windows 6.0+.  Patch by Jason
  R. Coombs.
6002

Benjamin Peterson's avatar
Benjamin Peterson committed
6003 6004 6005
- In struct.pack, correctly propogate exceptions from computing the truth of an
  object in the '?' format.

6006 6007
- Issue #9000: datetime.timezone objects now have eval-friendly repr.

Benjamin Peterson's avatar
Benjamin Peterson committed
6008 6009
- In the math module, correctly lookup __trunc__, __ceil__, and __floor__ as
  special methods.
6010

6011 6012 6013 6014
- Issue #9005: Prevent utctimetuple() from producing year 0 or year 10,000.
  Prior to this change, timezone adjustment in utctimetuple() could produce
  tm_year value of 0 or 10,000.  Now an OverflowError is raised in these edge
  cases.
6015

6016 6017 6018 6019 6020 6021
- Issue #6641: The ``datetime.strptime`` method now supports the ``%z``
  directive.  When the ``%z`` directive is present in the format string, an
  aware ``datetime`` object is returned with ``tzinfo`` bound to a
  ``datetime.timezone`` instance constructed from the parsed offset.  If both
  ``%z`` and ``%Z`` are present, the data in ``%Z`` field is used for timezone
  name, but ``%Z`` data without ``%z`` is discarded.
6022

6023
- Issue #5094: The ``datetime`` module now has a simple concrete class
6024 6025 6026 6027 6028
  implementing ``datetime.tzinfo`` interface.  Instances of the new class,
  ``datetime.timezone``, return fixed name and UTC offset from their
  ``tzname(dt)`` and ``utcoffset(dt)`` methods.  The ``dst(dt)`` method always
  returns ``None``.  A class attribute, ``utc`` contains an instance
  representing the UTC timezone.  Original patch by Rafe Kaplan.
6029

6030 6031
- Issue #8973: Add __all__ to struct module; this ensures that help(struct)
  includes documentation for the struct.Struct class.
6032

6033
- Issue #3129: Trailing digits in struct format string are no longer ignored.
6034
  For example, "1" or "ilib123" are now invalid formats and cause
6035
  ``struct.error`` to be raised.  Patch by Caleb Deveraux.
6036

6037 6038 6039
- Issue #7384: If the system readline library is linked against ncurses, the
  curses module must be linked against ncurses as well. Otherwise it is not safe
  to load both the readline and curses modules in an application.
Stefan Krah's avatar
Stefan Krah committed
6040

6041 6042
- Issue #2810: Fix cases where the Windows registry API returns ERROR_MORE_DATA,
  requiring a re-try in order to get the complete result.
6043

6044 6045 6046 6047 6048
- Issue #8692: Optimize math.factorial: replace the previous naive algorithm
  with an improved 'binary-split' algorithm that uses fewer multiplications and
  allows many of the multiplications to be performed using plain C integer
  arithmetic instead of PyLong arithmetic.  Also uses a lookup table for small
  arguments.
6049

6050 6051 6052
- Issue #8674: Fixed a number of incorrect or undefined-behaviour-inducing
  overflow checks in the audioop module.

6053 6054
- Issue #8644: The accuracy of td.total_seconds() has been improved (by
  calculating with integer arithmetic instead of float arithmetic internally):
6055 6056
  the result is now always correctly rounded, and is equivalent to ``td /
  timedelta(seconds=1)``.
6057

6058 6059 6060
- Issue #2706: Allow division of a timedelta by another timedelta: timedelta /
  timedelta, timedelta % timedelta, timedelta // timedelta and divmod(timedelta,
  timedelta) are all supported.
6061

6062 6063
- Issue #8314: Fix unsigned long long bug in libffi on Sparc v8.

6064 6065 6066 6067 6068
- Issue #8300: When passing a non-integer argument to struct.pack with any
  integer format code, struct.pack first attempts to convert the non-integer
  using its __index__ method.  If that method is non-existent or raises
  TypeError it goes on to try the __int__ method, as described below.

6069 6070
- Issue #8142: Update libffi to the 3.0.9 release.

6071 6072
- Issue #6949: Allow the _dbm extension to be built with db 4.8.x.

6073
- Issue #6544: Fix a reference leak in the kqueue implementation's error
6074 6075
  handling.

6076 6077 6078
- Stop providing crtassem.h symbols when compiling with Visual Studio 2010, as
  msvcr100.dll is not a platform assembly anymore.

6079 6080
- Issue #6508: Add posix.{getresuid,getresgid,setresuid,setresgid}.

6081 6082
- Issue #7078: Set struct.__doc__ from _struct.__doc__.

6083
- Issue #3366: Add erf, erfc, expm1, gamma, lgamma functions to math module.
6084

6085 6086
- Issue #6877: It is now possible to link the readline extension to the libedit
  readline emulation on OSX 10.5 or later.
6087

6088 6089
- Issue #6848: Fix curses module build failure on OS X 10.6.

6090 6091
- Fix a segfault that could be triggered by expat with specially formed input.

6092 6093 6094
- Issue #6561: '\d' in a regex now matches only characters with Unicode category
  'Nd' (Number, Decimal Digit).  Previously it also matched characters with
  category 'No'.
6095

6096 6097
- Issue #4509: Array objects are no longer modified after an operation failing
  due to the resize restriction in-place when the object has exported buffers.
6098

6099 6100
- Issue #2389: Array objects are now pickled in a portable manner.

6101 6102 6103
- Expat: Fix DoS via XML document with malformed UTF-8 sequences
  (CVE_2009_3560).

6104 6105 6106
- Issue #7242: On Solaris 9 and earlier calling os.fork() from within a thread
  could raise an incorrect RuntimeError about not holding the import lock.  The
  import lock is now reinitialized after fork.
6107

6108 6109 6110
- Issue #7999: os.setreuid() and os.setregid() would refuse to accept a -1
  parameter on some platforms such as OS X.

6111 6112
- Build the ossaudio extension on GNU/kFreeBSD.

6113 6114
- Issue #7347: winreg: Add CreateKeyEx and DeleteKeyEx, as well as fix a bug in
  the return value of QueryReflectionKey.
6115

6116
- Issue #7567: PyCurses_setupterm: Don't call ``setupterm`` twice.
6117

6118 6119 6120
Build
-----

6121 6122
- Use OpenSSL 1.0.0a on Windows.

6123 6124
- Issue #9280: Make sharedinstall depend on sharedmods.

6125 6126 6127 6128 6129
- Issue #9189: Make a user-specified CFLAGS, CPPFLAGS, or LDFLAGS setting
  override the configure and makefile defaults, without deleting options the
  user didn't intend to override.  Developers should no longer need to specify
  OPT or EXTRA_CFLAGS, although those variables are still present for
  backward-compatibility.
6130

6131 6132
- Issue #8854: Fix finding Visual Studio 2008 on Windows x64.

6133 6134
- Issue #1759169, #8864: Drop _XOPEN_SOURCE on Solaris, define it for
  multiprocessing only.
6135

6136 6137 6138 6139
- Issue #8625: Turn off optimization in --with-pydebug builds with gcc.
  (Optimization was unintentionally turned on in gcc --with-pydebug builds as a
  result of the issue #1628484 fix, combined with autoconf's strange choice of
  default CFLAGS produced by AC_PROG_CC for gcc.)
6140

6141 6142
- Issue #3646: It is now easily possible to install a Python framework into your
  home directory on MacOSX, see Mac/README for more information.
6143

6144 6145
- Issue #3928: os.mknod() now available in Solaris, also.

6146 6147 6148
- Issue #3326: Build Python without -fno-strict-aliasing when the gcc does not
  give false warnings.

6149 6150 6151
- Issue #1628484: The Makefile doesn't ignore the CFLAGS environment variable
  anymore.  It also forwards the LDFLAGS settings to the linker when building a
  shared library.
6152

6153 6154
- Issue #6716: Quote -x arguments of compileall in MSI installer.  Exclude 2to3
  tests from compileall.
6155

6156
- Issue #3920, #7903: Define _BSD_SOURCE on OpenBSD 4.4 through 4.9.
6157

6158 6159 6160
- Issue #7632: When Py_USING_MEMORY_DEBUGGER is defined, disable the private
  memory allocation scheme in dtoa.c and use PyMem_Malloc and PyMem_Free
  instead.  Also disable caching of powers of 5.
6161

6162 6163 6164 6165 6166
- Issue #6491: Allow --with-dbmliborder to specify that no dbms will be built.

- Issue #6943: Use pkg-config to find the libffi headers when the
  --with-system-ffi flag is used.

6167 6168 6169 6170
- Issue #7609: Add a --with-system-expat option that causes the system's expat
  library to be used for the pyexpat module instead of the one included with
  Python.

6171 6172 6173
- Issue #7589: Only build the nis module when the correct header files are
  found.

6174
- Switch to OpenSSL 0.9.8l and sqlite 3.6.21 on Windows.
6175

6176 6177 6178
- Issue #5792: Extend the short float repr support to x86 systems using
  icc or suncc.

6179 6180 6181
- Issue #6603: Change READ_TIMESTAMP macro in ceval.c so that it compiles
  correctly under gcc on x86-64.  This fixes a reported problem with the
  --with-tsc build on x86-64.
6182

6183
- Issue #6802: Fix build issues on MacOSX 10.6.
6184

6185 6186
- Issue #6244: Allow detect_tkinter to look for Tcl/Tk 8.6.

6187
- Issue #4601: 'make install' did not set the appropriate permissions on
6188 6189
  directories.

6190
- Issue #5390: Add uninstall icon independent of whether file extensions are
6191
  installed.
6192

6193
- Issue #7541: When using ``python-config`` with a framework install the
6194
  compiler might use the wrong library.
6195

6196 6197
- python-config now supports multiple options on the same command line.

6198 6199
- Issue #8509: Fix quoting in help strings and code snippets in configure.in.

6200 6201
- Issue #8510: Update to autoconf2.65.

6202
Documentation
6203
-------------
6204

6205 6206 6207
- Issue #9817: Add expat COPYING file; add expat, libffi and expat licenses
  to Doc/license.rst.

6208 6209 6210
- Issue #9524: Document that two CTRL* signals are meant for use only
  with os.kill.

6211
- Issue #9255: Document that the 'test' package is meant for internal Python use
6212 6213
  only.

6214
- A small WSGI server was added as Tools/scripts/serve.py, and is used to
6215 6216
  implement a local documentation server via 'make serve' in the doc directory.

6217 6218
- Updating `Using Python` documentation to include description of CPython's -J
  and -X options.
6219

6220 6221 6222
- Document that importing a module that has None in sys.modules triggers an
  ImportError.

6223 6224
- Issue #6556: Fixed the Distutils configuration files location explanation for
  Windows.
6225

6226 6227
- Update python manual page (options -B, -O0, -s, environment variables
  PYTHONDONTWRITEBYTECODE, PYTHONNOUSERSITE).
6228

6229 6230 6231
- Issue #8909: Added the size of the bitmap used in the installer created by
  distutils' bdist_wininst. Patch by Anatoly Techtonik.

6232 6233 6234
Tests
-----

6235 6236
- Issue #9251: test_threaded_import didn't fail when run through regrtest if the
  import lock was disabled.
6237

6238 6239
- Issue #8605: Skip test_gdb if Python is compiled with optimizations.

6240
- Issue #7449: Skip test_socketserver if threading support is disabled.
6241

6242 6243 6244
- Issue #8672: Add a zlib test ensuring that an incomplete stream can be handled
  by a decompressor object without errors (it returns incomplete uncompressed
  data).
6245

6246
- Issue #8533: regrtest uses backslashreplace error handler for stdout to avoid
6247
  UnicodeEncodeError (write non-ASCII character to stdout using ASCII encoding).
6248

6249 6250 6251
- Issue #8576: Remove use of find_unused_port() in test_smtplib and
  test_multiprocessing.  Patch by Paul Moore.

6252 6253 6254
- Issue #7449: Fix many tests to support Python compiled without thread
  support. Patches written by Jerry Seutter.

6255 6256
- Issue #8108: test_ftplib's non-blocking SSL server now has proper handling of
  SSL shutdowns.
6257

6258 6259
- Issues #8279, #8330, #8437, #8480, #8495: Fix test_gdb failures, patch written
  by Dave Malcolm.
6260

6261 6262
- Issue #3864: Skip three test_signal tests on freebsd6 because they fail if any
  thread was previously started, most likely due to a platform bug.
6263

6264 6265
- Issue #8193: Fix test_zlib failure with zlib 1.2.4.

6266 6267
- Issue #8248: Add some tests for the bool type.  Patch by Gregory Nofi.

6268 6269 6270
- Issue #8263: Now regrtest.py will report a failure if it receives a
  KeyboardInterrupt (SIGINT).

6271 6272
- Issue #8180 and #8207: Fix test_pep277 on OS X and add more tests for special
  Unicode normalization cases.
6273

6274 6275
- Issue #7783: test.support.open_urlresource invalidates the outdated files from
  the local cache.
6276

6277 6278 6279
- Issue #7849: Now the utility ``check_warnings`` verifies if the warnings are
  effectively raised.

6280 6281
- The four path modules (genericpath, macpath, ntpath, posixpath) share a common
  TestCase for some tests: test_genericpath.CommonTest.
6282

6283 6284
- Print platform information when running the whole test suite, or using the
  --verbose flag.
6285

6286 6287 6288
- Issue #767675: enable test_pep277 on POSIX platforms with Unicode-friendly
  filesystem encoding.

6289 6290
- Issue #6292: for the moment at least, the test suite runs cleanly if python is
  run with the -OO flag.  Tests requiring docstrings are skipped.
6291

6292 6293 6294 6295
- Issue #7712: test.support gained a new `temp_cwd` context manager which is now
  also used by regrtest to run all the tests in a temporary directory.  The
  original CWD is saved in `support.SAVEDCWD`.  Thanks to Florent Xicluna who
  helped with the patch.
6296

6297 6298 6299
- Issue #7924: Fix an intermittent 'XXX undetected error' failure in test_capi
  (only seen so far on platforms where the curses module wasn't built), due to
  an uncleared exception.
6300

6301 6302
- Issue #7728: test_timeout was changed to use support.bind_port instead of a
  hard coded port.
6303

6304
- Issue #7376: Instead of running a self-test (which was failing) when called
6305 6306
  with no arguments, doctest.py now gives a usage message.

6307 6308
- Issue #7396: fix regrtest -s, which was broken by the -j enhancement.

6309
- Issue #7498: test_multiprocessing now uses test.support.find_unused_port
6310 6311
  instead of a hardcoded port number in test_rapid_restart.

6312 6313 6314
- Issue #7431: Use TESTFN in test_linecache instead of trying to create a file
  in the Lib/test directory, which might be read-only for the user running the
  tests.
6315

6316 6317
- Issue #7324: Add a sanity check to regrtest argument parsing to catch the case
  of an option with no handler.
6318

6319 6320
- Issue #7312: Add a -F flag to run the selected tests in a loop until a test
  fails.  Can be combined with -j.
6321

6322 6323 6324 6325
- Issue #6551: test_zipimport could import and then destroy some modules of the
  encodings package, which would make other tests fail further down the road
  because the internally cached encoders and decoders would point to empty
  global variables.
6326

6327 6328
- Issue #7295: Do not use a hardcoded file name in test_tarfile.

6329 6330 6331
- Issue #7270: Add some dedicated unit tests for multi-thread synchronization
  primitives such as Lock, RLock, Condition, Event and Semaphore.

6332 6333 6334 6335
- Issue #7248 (part 2): Use a unique temporary directory for importlib source
  tests instead of tempfile.tempdir. This prevents the tests from sharing state
  between concurrent executions on the same system.

6336 6337 6338 6339
- Issue #7248: In importlib.test.source.util a try/finally block did not make
  sure that some referenced objects actually were created in the block before
  calling methods on the object.

6340
- Issue #7222: Make thread "reaping" more reliable so that reference
6341 6342 6343
  leak-chasing test runs give sensible results. The previous method of reaping
  threads could return successfully while some Thread objects were still
  referenced. This also introduces a new private function:
6344 6345
  :func:`_thread._count()`.

6346 6347
- Issue #7151: Fixed regrtest -j so that output to stderr from a test no longer
  runs the risk of causing the worker thread to fail.
6348

6349 6350 6351
- Issue #7055: test___all__ now greedily detects all modules which have an
  __all__ attribute, rather than using a hardcoded and incomplete list.

R. David Murray's avatar
R. David Murray committed
6352
- Issue #7058: Added save/restore for things like sys.argv and cwd to
6353 6354
  runtest_inner in regrtest, with warnings if the called test modifies them, and
  a new section in the summary report at the end.
6355

6356 6357
- Issue #7042: Fix test_signal (test_itimer_virtual) failure on OS X 10.6.

6358 6359 6360
- Fixed tests in importlib.test.source.test_abc_loader that were masking the
  proper exceptions that should be raised for missing or improper code object
  bytecode.
6361

6362
- Removed importlib's custom test discovery code and switched to
6363
  unittest.TestLoader.discover().
6364

6365 6366 6367
Tools/Demos
-----------

6368
- Issue #5464, #8974: Implement plural forms in msgfmt.py.
6369

6370
- iobench (a file I/O benchmark) and ccbench (a concurrency benchmark) were
6371
  added to the `Tools/` directory.  They were previously living in the sandbox.
6372

Benjamin Peterson's avatar
Benjamin Peterson committed
6373

6374 6375 6376 6377 6378 6379 6380 6381
What's New in Python 3.1?
=========================

*Release date: 27-June-2009*

Core and Builtins
-----------------

Mark Dickinson's avatar
Mark Dickinson committed
6382 6383 6384
- Issue #6334: Fix bug in range length calculation for ranges with
  large arguments.

6385 6386 6387
- Issue #6329: Fixed iteration for memoryview objects (it was being blocked
  because it wasn't recognized as a sequence).

6388 6389 6390
Library
-------

6391 6392
- Issue #6126: Fixed pdb command-line usage.

6393
- Issue #6314: logging: performs extra checks on the "level" argument.
6394

6395 6396
- Issue #6274: Fixed possible file descriptors leak in subprocess.py

6397 6398 6399
- Accessing io.StringIO.buffer now raises an AttributeError instead of
  io.UnsupportedOperation.

6400
- Issue #6271: mmap tried to close invalid file handle (-1) when anonymous.
6401 6402
  (On Unix)

6403 6404 6405
- Issue #1202: zipfile module would cause a struct.error when attempting to
  store files with a CRC32 > 2**31-1.

6406 6407 6408 6409 6410
Extension Modules
-----------------

- Issue #5590: Remove unused global variable in pyexpat extension.

6411

Antoine Pitrou's avatar
Antoine Pitrou committed
6412 6413
What's New in Python 3.1 Release Candidate 2?
=============================================
Benjamin Peterson's avatar
Benjamin Peterson committed
6414

Benjamin Peterson's avatar
Benjamin Peterson committed
6415
*Release date: 13-June-2009*
Benjamin Peterson's avatar
Benjamin Peterson committed
6416 6417 6418 6419

Core and Builtins
-----------------

6420 6421
- Fixed SystemError triggered by "range([], 1, -1)".

6422 6423 6424
- Issue #5924: On Windows, a large PYTHONPATH environment variable
  (more than 255 characters) would be completely ignored.

6425 6426 6427
- Issue #4547: When debugging a very large function, it was not always
  possible to update the lineno attribute of the current frame.

6428
- Issue #5330: C functions called with keyword arguments were not reported by
6429
  the various profiling modules (profile, cProfile). Patch by Hagen Fürstenau.
6430

Benjamin Peterson's avatar
Benjamin Peterson committed
6431 6432 6433
Library
-------

6434
- Issue #6438: Fixed distutils.cygwinccompiler.get_versions : the regular
6435
  expression string pattern was trying to match against a bytes returned by
6436 6437
  Popen. Tested under win32 to build the py-postgresql project.

6438 6439
- Issue #6258: Support AMD64 in bdist_msi.

6440 6441 6442
- Issue #6195: fixed doctest to no longer try to read 'source' data from
  binary files.

6443 6444 6445
- Issue #5262: Fixed bug in next rollover time computation in
  TimedRotatingFileHandler.

6446 6447 6448 6449
- Issue #6217: The C implementation of io.TextIOWrapper didn't include the
  errors property.  Additionally, the errors and encoding properties of StringIO
  are always None now.

6450 6451 6452 6453 6454
- Issue #6137: The pickle module now translates module names when loading
  or dumping pickles with a 2.x-compatible protocol, in order to make data
  sharing and migration easier. This behaviour can be disabled using the
  new `fix_imports` optional argument.

6455 6456
- Removed the ipaddr module.

6457 6458 6459 6460
- Issue #3613: base64.{encode,decode}string are now called
  base64.{encode,decode}bytes which reflects what type they accept and return.
  The old names are still there as deprecated aliases.

6461 6462
- Issue #5767: Remove sgmlop support from xmlrpc.client.

6463 6464
- Issue #6150: Fix test_unicode on wide-unicode builds.

6465 6466 6467
- Issue #6149: Fix initialization of WeakValueDictionary objects from non-empty
  parameters.

Martin v. Löwis's avatar
Martin v. Löwis committed
6468 6469 6470
Windows
-------

6471 6472
- Issue #6221: Delete test registry key before running the test.

Martin v. Löwis's avatar
Martin v. Löwis committed
6473 6474
- Issue #6158: Package Sine-1000Hz-300ms.aif in MSI file.

6475 6476 6477 6478 6479 6480 6481
C-API
-----

- Issue #5735: Python compiled with --with-pydebug should throw an
  ImportError when trying to import modules compiled without
  --with-pydebug, and vice-versa.

Benjamin Peterson's avatar
Benjamin Peterson committed
6482

6483 6484 6485 6486 6487 6488
Build
-----

- Issue #6154: Make sure the intl library is added to LIBS if needed. Also
  added LIBS to OS X framework builds.

6489 6490 6491 6492
- Issue #5809: Specifying both --enable-framework and --enable-shared is
  an error. Configure now explicity tells you about this.


6493

Mark Dickinson's avatar
Mark Dickinson committed
6494 6495
What's New in Python 3.1 release candidate 1?
=============================================
Benjamin Peterson's avatar
Benjamin Peterson committed
6496

Benjamin Peterson's avatar
Benjamin Peterson committed
6497
*Release date: 2009-05-30*
Benjamin Peterson's avatar
Benjamin Peterson committed
6498 6499 6500 6501

Core and Builtins
-----------------

6502 6503 6504
- Issue #6097: Escape UTF-8 surrogates resulting from mbstocs conversion
  of the command line.

6505 6506
- Issue #6012: Add cleanup support to O& argument parsing.

6507 6508 6509
- Issue #6089: Fixed str.format with certain invalid field specifiers
  that would raise SystemError.

6510 6511 6512
- Issue #5982: staticmethod and classmethod now expose the wrapped
  function with __func__.

6513 6514
- Added support for multiple context managers in the same with-statement.
  Deprecated contextlib.nested() which is no longer needed.
6515

6516 6517 6518 6519
- Issue #5829: complex("1e500") no longer raises OverflowError.  This
  makes it consistent with float("1e500") and interpretation of real
  and imaginary literals.

6520 6521
- Issue #3527: Removed Py_WIN_WIDE_FILENAMES which is not used any more.

6522 6523
- Issue #5994: the marshal module now has docstrings.

6524 6525 6526 6527 6528 6529
- Issue #5981: Fix three minor inf/nan issues in float.fromhex:
  (1) inf and nan strings with trailing whitespace were incorrectly
  rejected;  (2) parsing of strings representing infinities and nans
  was locale aware; and (3) the interpretation of fromhex('-nan')
  didn't match that of float('-nan').

Benjamin Peterson's avatar
Benjamin Peterson committed
6530 6531 6532
Library
-------

6533 6534
- Issue #4859: Implement PEP 383 for pwd, spwd, and grp.

6535 6536
- smtplib 'login' and 'cram-md5' login are also fixed (see Issue #5259).

6537 6538 6539
- Issue #6121: pydoc now ignores leading and trailing spaces in the
  argument to the 'help' function.

6540 6541 6542
- Issue #6118: urllib.parse.quote_plus ignored the encoding and errors
  arguments for strings with a space in them.

6543 6544 6545
- collections.namedtuple() was not working with the following field
  names:  cls, self, tuple, itemgetter, and property.

6546 6547 6548
- In unittest, using a skipping decorator on a class is now equivalent to
  skipping every test on the class.  The ClassTestSuite class has been removed.

6549 6550 6551
- Issue #6050: Don't fail extracting a directory from a zipfile if
  the directory already exists.

6552 6553 6554 6555
- Issue #1309352: fcntl now converts its third arguments to a C `long` rather
  than an int, which makes some operations possible under 64-bit Linux (e.g.
  DN_MULTISHOT with F_NOTIFY).

6556 6557 6558
- Issue #5761: Add the name of the underlying file to the repr() of various
  IO objects.

6559 6560 6561
- Issue #5259: smtplib plain auth login no longer gives a traceback.  Fix
  by Musashi Tamura, tests by Marcin Bachry.

6562 6563 6564 6565
- Issue #1983: Fix functions taking or returning a process identifier to use
  the dedicated C type ``pid_t`` instead of a C ``int``. Some platforms have
  a process identifier type wider than the standard C integer type.

6566 6567 6568
- Issue #4066: smtplib.SMTP_SSL._get_socket now correctly returns the socket.
  Patch by Farhan Ahmad, test by Marcin Bachry.

6569 6570 6571
- Issue #2116: Weak references and weak dictionaries now support copy()ing and
  deepcopy()ing.

6572 6573
- Issue #1655: Make imaplib IPv6-capable. Patch by Derek Morr.

6574 6575
- Issue #5918: Fix a crash in the parser module.

6576 6577
- Issue #1664: Make nntplib IPv6-capable. Patch by Derek Morr.

6578 6579 6580 6581 6582
- Issue #5006: Better handling of unicode byte-order marks (BOM) in the io
  library. This means, for example, that opening an UTF-16 text file in
  append mode doesn't add a BOM at the end of the file if the file isn't
  empty.

6583 6584 6585 6586
- Issue #4050: inspect.findsource/getsource now raise an IOError if the 'source'
  file is a binary.  Patch by Brodie Rao, tests by Daniel Diniz.  This fix
  corrects a pydoc regression.

6587
- Issue #5955: aifc's close method did not close the file it wrapped,
6588 6589
  now it does.  This also means getfp method now returns the real fp.

6590 6591 6592 6593 6594
Installation
------------

- Issue #6047: fullinstall has been removed because Python 3's executable will
  now be known as python3.
Benjamin Peterson's avatar
Benjamin Peterson committed
6595

6596 6597
- Lib/smtpd.py is no longer installed as a script.

6598 6599 6600
Extension Modules
-----------------

Martin v. Löwis's avatar
Martin v. Löwis committed
6601
- Issue #3061: Use wcsftime for time.strftime where available.
6602

6603 6604
- Issue #4873: Fix resource leaks in error cases of pwd and grp.

6605 6606
- Issue #6093: Fix off-by-one error in locale.strxfrm.

Benjamin Peterson's avatar
Benjamin Peterson committed
6607 6608
- The _functools and _locale modules are now built into the libpython shared
  library instead of as extension modules.
Benjamin Peterson's avatar
Benjamin Peterson committed
6609

6610 6611 6612 6613 6614 6615 6616
Build
-----

- Issue #3585: Add pkg-config support. It creates a python-2.7.pc file
  and a python3.pc symlink in the $(LIBDIR)/pkgconfig directory. Patch by
  Clinton Roy.

6617 6618 6619
Tests
-----

6620
- Issue #5442: Tests for importlib were not properly skipping case-sensitivity
6621 6622 6623 6624 6625
  tests on darwin even when the OS was installed on a case-sensitive
  filesystem. Also fixed tests that should not be run when
  sys.dont_write_bytecode is true.


Benjamin Peterson's avatar
Benjamin Peterson committed
6626 6627 6628
What's New in Python 3.1 beta 1?
================================

Benjamin Peterson's avatar
Benjamin Peterson committed
6629
*Release date: 2009-05-06*
Benjamin Peterson's avatar
Benjamin Peterson committed
6630 6631 6632 6633

Core and Builtins
-----------------

Mark Dickinson's avatar
Mark Dickinson committed
6634 6635 6636
- Issue #5914: Add new C API function PyOS_string_to_double, and
  deprecate PyOS_ascii_strtod and PyOS_ascii_atof.

6637 6638 6639 6640
- Issue #3382: float.__format__, complex.__format__, and %-formatting
  no longer map 'F' to 'f'. Because of issue #5859 (below), this only
  affects nan -> NAN and inf -> INF.

6641 6642 6643 6644
- Issue #5799: ntpath (ie, os.path on Windows) fully supports UNC pathnames
  in all operations, including splitdrive, split, etc.  splitunc() now issues
  a PendingDeprecation warning.

6645 6646 6647 6648 6649 6650 6651 6652 6653
- Issue #5920: For float.__format__, change the behavior with the
  empty presentation type (that is, not one of 'e', 'f', 'g', or 'n')
  to be like 'g' but with at least one decimal point and with a
  default precision of 12. Previously, the behavior the same but with
  a default precision of 6.  This more closely matches str(), and
  reduces surprises when adding alignment flags to the empty
  presentation type. This also affects the new complex.__format__ in
  the same way.

6654 6655
- Implement PEP 383, Non-decodable Bytes in System Character Interfaces.

6656 6657 6658 6659
- Issue #5890: in subclasses of 'property' the __doc__ attribute was
  shadowed by classtype's, even if it was None.  property now
  inserts the __doc__ into the subclass instance __dict__.

6660 6661 6662
- Issue #4426: The UTF-7 decoder was too strict and didn't accept some legal
  sequences. Patch by Nick Barnes and Victor Stinner.

6663
- Issue #3672: Reject surrogates in utf-8 codec; add surrogatepass error handler.
6664

6665 6666 6667 6668
- Issue #5883: In the io module, the BufferedIOBase and TextIOBase ABCs have
  received a new method, detach().  detach() disconnects the underlying stream
  from the buffer or text IO and returns it.

6669 6670 6671 6672
- Issue #5859: Remove switch from '%f' to '%g'-style formatting for
  floats with absolute value over 1e50.  Also remove length
  restrictions for float formatting: '%.67f' % 12.34 and '%.120e' %
  12.34 no longer raise an exception.
6673

6674
- Issue #1588: Add complex.__format__. For example,
6675 6676
  format(complex(1, 2./3), '.5') now produces a sensible result.

6677 6678 6679
- Issue #5864: Fix empty format code formatting for floats so that it
  never gives more than the requested number of significant digits.

6680 6681 6682
- Issue #5793: Rationalize isdigit / isalpha / tolower, etc. Includes
  new Py_ISDIGIT / Py_ISALPHA / Py_TOLOWER, etc. in pctypes.h.

6683 6684
- Issue #5835: Deprecate PyOS_ascii_formatd.

6685 6686 6687
- Issue #4971: Fix titlecase for characters that are their own
  titlecase, but not their own uppercase.

6688 6689
- Issue #5283: Setting __class__ in __del__ caused a segfault.

6690 6691 6692
- Issue #5816: complex(repr(z)) now recovers z exactly, even when
  z involves nans, infs or negative zeros.

6693
- Issue #3166: Make int -> float conversions correctly rounded.
6694

6695 6696 6697 6698 6699
- Issue #1869 (and many duplicates): make round(x, n) correctly
  rounded for a float x, by using the decimal <-> binary conversions
  from Python/dtoa.c.  As a consequence, (e.g.) round(x, 2) now
  consistently agrees with format(x, '.2f').

6700 6701 6702
- Issue #5787: object.__getattribute__(some_type, "__bases__") segfaulted on
  some builtin types.

6703 6704
- Issue #5772: format(1e100, '<') produces '1e+100', not '1.0e+100'.

6705 6706
- Issue #5515: str.format() type 'n' combined with commas and leading
  zeros no longer gives odd results with ints and floats.
6707 6708 6709 6710

- Implement PEP 378, Format Specifier for Thousands Separator, for
  floats.

6711
- The str function switches to exponential notation at
6712 6713 6714 6715 6716 6717 6718 6719 6720
  1e11, not 1e12.  This avoids printing 13 significant digits in
  situations where only 12 of them are correct.  Example problem
  value: str(1e11 + 0.5).  (This minor issue has existed in 2.x for a
  long time.)

- Issue #1580: On most platforms, use a 'short' float repr: for a
  finite float x, repr(x) now outputs a string based on the shortest
  sequence of decimal digits that rounds to x.  Previous behaviour was
  to output 17 significant digits and then strip trailing zeros.
6721 6722 6723
  Another minor difference is that the new repr switches to
  exponential notation at 1e16 instead of the previous 1e17; this
  avoids misleading output in some cases.
6724 6725 6726 6727 6728 6729 6730 6731 6732 6733 6734 6735

  There's a new sys attribute sys.float_repr_style, which takes
  the value 'short' to indicate that we're using short float repr,
  and 'legacy' if the short float repr isn't available for one
  reason or another.

  The float repr change involves incorporating David Gay's 'perfect
  rounding' code into the Python core (it's in Python/dtoa.c).  As a
  secondary consequence, all string-to-float and float-to-string
  conversions (including all float formatting operations) will be
  correctly rounded on these platforms.

6736
  See issue #1580 discussions for details of platforms for which
6737 6738
  this change does not apply.

6739 6740
- Issue #5759: float() didn't call __float__ on str subclasses.

6741 6742 6743 6744 6745
- The string.maketrans() function is deprecated; there is a new static method
  maketrans() on the bytes and bytearray classes.  This removes confusion about
  the types string.maketrans() is supposed to work with, and mirrors the
  methods available on the str class.

6746 6747 6748
- Issue #2170: refactored xml.dom.minidom.normalize, increasing both
  its clarity and its speed.

6749
- Issue #1113244: Py_XINCREF, Py_DECREF, Py_XDECREF: Add ``do { ... } while (0)``
6750 6751
  to avoid compiler warnings.

6752 6753 6754
- Issue #3739: The unicode-internal encoder now reports the number of characters
  consumed like any other encoder (instead of the number of bytes).

6755 6756 6757 6758 6759
Installation
------------

- Issue #5756: Install idle and pydoc with a 3 suffix.

Benjamin Peterson's avatar
Benjamin Peterson committed
6760 6761 6762
Library
-------

6763 6764
- Issue #8203: Fix IDLE Credits dialog: view_file() uses its encoding argument.

6765 6766 6767
- Issue #5311: bdist_msi can now build packages that do not depend on a
  specific Python version.

6768 6769 6770
- Issue #5150: IDLE's format menu now has an option to strip trailing
  whitespace.

6771
- Issue #5940: distutils.command.build_clib.check_library_list was not doing
6772 6773
  the right type checkings anymore.

6774 6775 6776
- Issue #4875: On win32, ctypes.util.find_library does no longer
  return directories.

6777 6778
- Issue #5142: Add the ability to skip modules while stepping to pdb.

6779 6780 6781
- Issue #1309567: Fix linecache behavior of stripping subdirectories when
  looking for files given by a relative filename.

6782 6783 6784
- Issue #5923: Update the ``turtle`` module to version 1.1, add two new
  turtle demos in Demo/turtle.

6785 6786 6787
- Issue #5692: In :class:`zipfile.Zipfile`, fix wrong path calculation when
  extracting a file to the root directory.

6788 6789
- Issue #5913: os.listdir() should fail for empty path on windows.

6790 6791 6792 6793
- Issue #5084: unpickling now interns the attribute names of pickled objects,
  saving memory and avoiding growth in size of subsequent pickles. Proposal
  and original patch by Jake McGuire.

6794 6795
- The json module now works exclusively with str and not bytes.

6796 6797 6798
- Issue #3959: The ipaddr module has been added to the standard library.
  Contributed by Google.

6799 6800 6801
- Issue #3002: ``shutil.copyfile()`` and ``shutil.copytree()`` now raise an
  error when a named pipe is encountered, rather than blocking infinitely.

6802 6803
- Issue #5857: tokenize.tokenize() now returns named tuples.

6804 6805
- Issue #4305: ctypes should now build again on mipsel-linux-gnu

6806 6807 6808 6809
- Issue #1734234: Massively speedup ``unicodedata.normalize()`` when the
  string is already in normalized form, by performing a quick check beforehand.
  Original patch by Rauli Ruohonen.

6810 6811 6812 6813
- Issue #5853: calling a function of the mimetypes module from several threads
  at once could hit the recursion limit if the mimetypes database hadn't been
  initialized before.

6814 6815 6816
- Issue #5854: Updated __all__ to include some missing names and remove some
  names which should not be exported.

6817 6818 6819 6820 6821
- Issue #3102:  All global symbols that the _ctypes extension defines
  are now prefixed with 'Py' or '_ctypes'.

- Issue #5041: ctypes does now allow pickling wide character.

6822 6823 6824 6825
- Issue #5812: For the two-argument form of the Fraction constructor,
  Fraction(m, n), m and n are permitted to be arbitrary Rational
  instances.

6826 6827 6828 6829
- Issue #5812: Fraction('1e6') is valid: more generally, any string
  that's valid for float() is now valid for Fraction(), with the
  exception of strings representing NaNs and infinities.

6830 6831 6832
- Issue #5734: BufferedRWPair was poorly tested and had several glaring
  bugs. Patch by Brian Quinlan.

6833 6834 6835 6836 6837 6838
- Issue #1161031: fix readwrite select flag handling: POLLPRI now
  results in a handle_expt_event call, not handle_read_event, and POLLERR
  and POLLNVAL now call handle_close, not handle_expt_event.  Also,
  dispatcher now has an 'ignore_log_types' attribute for suppressing
  log messages, which is set to 'warning' by default.

6839 6840
- Issue #2703: SimpleXMLRPCDispatcher.__init__: Provide default values for
  new arguments introduced in 2.5.
6841 6842 6843 6844

- Issue #5828 (Invalid behavior of unicode.lower): Fixed bogus logic in
  makeunicodedata.py and regenerated the Unicode database (This fixes
  u'\u1d79'.lower() == '\x00').
6845

6846 6847 6848
Extension Modules
-----------------

6849 6850 6851
- Issue #5881: Remove old undocumented compatibility interfaces in hashlib and
  pwd.

6852 6853 6854 6855 6856
- Issue #5463: In struct module, remove deprecated float coercion
  for integer type codes: struct.pack('L', 0.3) should now raise
  an error.  The _PY_STRUCT_FLOAT_COERCE constant has been removed.
  The version number has been bumped to 0.3.

Georg Brandl's avatar
Georg Brandl committed
6857 6858
- Issue #5359: Readd the Berkeley DB detection code to allow _dbm be built
  using Berkeley DB.
6859

6860 6861 6862 6863 6864 6865 6866 6867 6868
Tests
-----

- Issue #5354: New test support function import_fresh_module() makes
  it easy to import both normal and optimised versions of modules.
  test_heapq and test_warnings have been adjusted to use it, tests for
  other modules with both C and Python implementations in the stdlib
  can be adjusted to use it over time.

6869 6870 6871 6872
- Issue #5837: Certain sequences of calls to set() and unset() for
  support.EnvironmentVarGuard objects restored the environment variables
  incorrectly on __exit__.

6873 6874 6875 6876 6877
C-API
-----

- Issue #5630: A replacement PyCObject API, PyCapsule, has been added.

Benjamin Peterson's avatar
Benjamin Peterson committed
6878

6879 6880 6881
What's New in Python 3.1 alpha 2?
=================================

Benjamin Peterson's avatar
Benjamin Peterson committed
6882
*Release date: 2009-4-4*
6883 6884 6885

Core and Builtins
-----------------
6886

6887 6888
- Implement PEP 378, Format Specifier for Thousands Separator, for
  integers.
6889

Benjamin Peterson's avatar
Benjamin Peterson committed
6890 6891
- Issue #5666: Py_BuildValue's 'c' code should create byte strings.

6892 6893 6894
- Issue #5499: The 'c' code for argument parsing functions now only accepts a
  byte, and the 'C' code only accepts a unicode character.

6895 6896 6897
- Fix a problem in PyErr_NormalizeException that leads to "undetected errors"
  when hitting the recursion limit under certain circumstances.

6898 6899
- Issue #1665206: Remove the last eager import in _warnings.c and make it lazy.

6900 6901 6902
- Fix a segfault when running test_exceptions with coverage, caused by
  insufficient checks in accessors of Exception.__context__.

6903 6904 6905 6906
- Issue #5604: non-ASCII characters in module name passed to
  imp.find_module() were converted to UTF-8 while the path is
  converted to the default filesystem encoding, causing nonsense.

6907 6908
- Issue #5126: str.isprintable() returned False for space characters.

6909 6910 6911
- Issue #4865: On MacOSX /Library/Python/2.7/site-packages is added to
  the end sys.path, for compatibility with the system install of Python.

6912 6913 6914 6915 6916
- Issue #4688: Add a heuristic so that tuples and dicts containing only
  untrackable objects are not tracked by the garbage collector. This can
  reduce the size of collections and therefore the garbage collection overhead
  on long-running programs, depending on their particular use of datatypes.

6917 6918 6919 6920
- Issue #5512: Rewrite PyLong long division algorithm (x_divrem) to
  improve its performance.  Long divisions and remainder operations
  are now between 50% and 150% faster.

6921 6922 6923 6924 6925 6926 6927
- Issue #4258: Make it possible to use base 2**30 instead of base
  2**15 for the internal representation of integers, for performance
  reasons.  Base 2**30 is enabled by default on 64-bit machines.  Add
  --enable-big-digits option to configure, which overrides the
  default.  Add sys.int_info structseq to provide information about
  the internal format.

6928 6929 6930 6931
- Issue #4474: PyUnicode_FromWideChar now converts characters outside
  the BMP to surrogate pairs, on systems with sizeof(wchar_t) == 4
  and sizeof(Py_UNICODE) == 2.

6932 6933 6934
- Issue #5237: Allow auto-numbered fields in str.format(). For
  example: '{} {}'.format(1, 2) == '1 2'.

6935 6936 6937
- Issue #5392: when a very low recursion limit was set, the interpreter would
  abort with a fatal error after the recursion limit was hit twice.

6938 6939 6940
- Issue #3845: In PyRun_SimpleFileExFlags avoid invalid memory access with
  short file names.

6941 6942 6943
Library
-------

6944
- Issue #2625: added missing items() call to the for loop in
6945 6946
  mailbox.MH.get_message().

6947 6948 6949 6950
- Issue #5640: Fix _multibytecodec so that CJK codecs don't repeat
  error substitutions from non-strict codec error callbacks in
  incrementalencoder and StreamWriter.

6951 6952 6953
- Issue #5656: Fix the coverage reporting when running the test suite with
  the -T argument.

6954 6955
- Issue #5647: MutableSet.__iand__() no longer mutates self during iteration.

6956 6957
- Issue #5624: Fix the _winreg module name still used in several modules.

6958 6959
- Issue #5628: Fix io.TextIOWrapper.read() with a unreadable buffer.

6960 6961 6962
- Issue #5619: Multiprocessing children disobey the debug flag and causes
  popups on windows buildbots. Patch applied to work around this issue.

6963 6964
- Issue #5400: Added patch for multiprocessing on netbsd compilation/support

6965 6966
- Issue #5387: Fixed mmap.move crash by integer overflow.

Jesse Noller's avatar
Jesse Noller committed
6967 6968 6969
- Issue #5261: Patch multiprocessing's semaphore.c to support context
  manager use: "with multiprocessing.Lock()" works now.

6970 6971 6972
- Issue #5236: Change time.strptime() to only take strings. Didn't work with
  bytes already but the failure was non-obvious.

Jesse Noller's avatar
Jesse Noller committed
6973 6974 6975 6976
- Issue #5177: Multiprocessing's SocketListener class now uses
  socket.SO_REUSEADDR on all connections so that the user no longer needs
  to wait 120 seconds for the socket to expire.

Benjamin Peterson's avatar
Benjamin Peterson committed
6977 6978
- Issue #5595: Fix UnboundedLocalError in ntpath.ismount().

6979 6980 6981
- Issue #1174606: Calling read() without arguments of an unbounded file
  (typically /dev/zero under Unix) could crash the interpreter.

6982 6983 6984
- The max_buffer_size arguments of io.BufferedWriter, io.BufferedRWPair, and
  io.BufferedRandom have been deprecated for removal in Python 3.2.

6985 6986 6987 6988 6989
- Issue #5068: Fixed the tarfile._BZ2Proxy.read() method that would loop
  forever on incomplete input. That caused tarfile.open() to hang when used
  with mode 'r' or 'r:bz2' and a fileobj argument that contained no data or
  partial bzip2 compressed data.

6990 6991 6992
- Issue #2110: Add support for thousands separator and 'n' type
  specifier to Decimal.__format__

6993 6994 6995
- Fix Decimal.__format__ bug that swapped the meanings of the '<' and
  '>' alignment characters.

6996 6997 6998
- The error detection code in FileIO.close() could fail to reflect the `errno`
  value, and report it as -1 instead.

6999 7000 7001
- Issue #5016: FileIO.seekable() could return False if the file position
  was negative when truncated to a C int. Patch by Victor Stinner.

7002 7003 7004
Extension Modules
-----------------

7005 7006
- Issue #5391: mmap now deals exclusively with bytes.

7007 7008
- Issue #5463: In struct module, remove deprecated overflow wrapping
  when packing an integer: struct.pack('=L', -1) now raises
7009 7010 7011
  struct.error instead of returning b'\xff\xff\xff\xff'.  The
  _PY_STRUCT_RANGE_CHECKING and _PY_STRUCT_OVERFLOW_MASKING constants
  have been removed from the struct module.
7012

7013

Benjamin Peterson's avatar
Benjamin Peterson committed
7014
What's New in Python 3.1 alpha 1
Barry Warsaw's avatar
Barry Warsaw committed
7015
================================
Barry Warsaw's avatar
Barry Warsaw committed
7016

Benjamin Peterson's avatar
Benjamin Peterson committed
7017
*Release date: 2009-03-07*
Barry Warsaw's avatar
Barry Warsaw committed
7018 7019 7020 7021

Core and Builtins
-----------------

7022 7023
- The io module has been reimplemented in C for speed.

7024 7025
- Give dict views an informative __repr__.

7026 7027 7028
- Issue #5247: Improve error message when unknown format codes are
  used when using str.format() with str, int, and float arguments.

7029 7030 7031
- Issue #5249: time.strftime returned malformed string when format string
  contained non ascii character on windows.

7032 7033 7034
- Issue #4626: compile(), exec(), and eval() ignore the coding cookie if the
  source has already been decoded into str.

7035 7036 7037
- Issue #5186: Reduce hash collisions for objects with no __hash__ method by
  rotating the object pointer by 4 bits to the right.

7038 7039 7040
- Issue #4575: Fix Py_IS_INFINITY macro to work correctly on x87 FPUs:
  it now forces its argument to double before testing for infinity.

7041 7042 7043
- Issue #5137: Make len() correctly raise a TypeError when a __len__ method
  returns a non-number type.

7044 7045
- Issue #5182: Removed memoryview.__str__.

7046 7047
- Issue #1717: Removed builtin cmp() function, dropped tp_compare
  slot, the C API functions PyObject_Compare and PyUnicode_Compare and
7048 7049
  the type definition cmpfunc.  The tp_compare slot has been renamed
  to tp_reserved, and is reserved for future usage.
7050

7051
- Issue #1242657: the __len__() and __length_hint__() calls in several tools
7052 7053
  were suppressing all exceptions.  These include list() and bytearray().

7054 7055 7056
- Issue #4707: round(x, n) now returns an integer if x is an integer.
  Previously it returned a float.

7057 7058 7059 7060 7061
- Issue #4753: By enabling a configure option named '--with-computed-gotos'
  on compilers that support it (notably: gcc, SunPro, icc), the bytecode
  evaluation loop is compiled with a new dispatch mechanism which gives
  speedups of up to 20%, depending on the system, on various benchmarks.

7062 7063
- Issue #4874: Most builtin decoders now reject unicode input.

7064 7065 7066
- Issue #4842: Don't allow trailing 'L' when constructing an integer
  from a string.

7067 7068
- Issue #4991: os.fdopen now raises an OSError for invalid file descriptors.

7069 7070 7071
- Issue #4838: When a module is deallocated, free the memory backing the
  optional module state data.

7072
- Issue #4910: Rename nb_long slot to nb_reserved, and change its
7073
  type to ``(void *)``.
7074

7075 7076 7077 7078
- Issue #4935: The overflow checking code in the expandtabs() method common
  to str, bytes and bytearray could be optimized away by the compiler, letting
  the interpreter segfault instead of raising an error.

7079 7080 7081
- Issue #3720: Fix a crash when an iterator modifies its class and removes its
  __next__ method.

7082 7083 7084 7085
- Issue #4910: Builtin int() function and PyNumber_Long/PyNumber_Int API
  function no longer attempt to call the __long__ slot to convert an object
  to an integer.  Only the __int__ and __trunc__ slots are examined.

7086 7087
- Issue #4893: Use NT threading on CE.

7088 7089
- Issue #4915: Port sysmodule to Windows CE.

7090 7091 7092 7093
- Issue #4868: utf-8, utf-16 and latin1 decoding are now 2x to 4x faster. The
  common cases are optimized thanks to a dedicated fast path and a moderate
  amount of loop unrolling.

7094 7095 7096 7097 7098 7099
- Issue #4074: Change the criteria for doing a full garbage collection (i.e.
  collecting the oldest generation) so that allocating lots of objects without
  destroying them does not show quadratic performance. Based on a proposal by
  Martin von Löwis at
  http://mail.python.org/pipermail/python-dev/2008-June/080579.html.

7100
- Issue #4604: Some objects of the I/O library could still be used after
7101 7102 7103
  having been closed (for instance, a read() call could return some
  previously buffered data). Patch by Dmitry Vasiliev.

7104 7105 7106 7107 7108
- Issue #4705: Fix the -u ("unbuffered binary stdout and stderr") command-line
  flag to work properly. Furthermore, when specifying -u, the text stdout
  and stderr streams have line-by-line buffering enabled (the default being
  to buffer arbitrary chunks of data).

7109 7110 7111 7112
- The internal table, _PyLong_DigitValue, is now an array of unsigned chars
  instead of ints (reducing its size from 4 to 8 times thereby reducing
  Python's overall memory).

7113 7114 7115 7116 7117 7118
- Issue #1180193: When importing a module from a .pyc (or .pyo) file with
  an existing .py counterpart, override the co_filename attributes of all
  code objects if the original filename is obsolete (which can happen if the
  file has been renamed, moved, or if it is accessed through different paths).
  Patch by Ziga Seilnacht and Jean-Paul Calderone.

7119 7120 7121 7122
- Issue #4580: Fix slicing of memoryviews when the item size is greater than
  one byte. Also fixes the meaning of len() so that it returns the number of
  items, rather than the size in bytes.

7123 7124
- Issue #4075: Use OutputDebugStringW in Py_FatalError.

7125 7126 7127
- Issue #4747: When the terminal does not use utf-8, executing a script with
  non-ascii characters in its name could fail with a "SyntaxError: None" error.

7128 7129
- Issue #4797: IOError.filename was not set when ``_fileio.FileIO`` failed
  to open file with a bytes filename on Windows.
7130

7131 7132 7133
- Issue #3680: Reference cycles created through a dict, set or deque iterator
  did not get collected.

7134 7135 7136
- Issue #4701: PyObject_Hash now implicitly calls PyType_Ready on types
  where the tp_hash and tp_dict slots are both NULL.

7137 7138 7139
- Issue #4759: None is now allowed as the first argument of
  bytearray.translate().  It was always allowed for bytes.translate().

7140 7141 7142
- Added test case to ensure attempts to read from a file opened for writing
  fail.

7143 7144
- Issue #3106: Speedup some comparisons (str/str and int/int).

7145 7146 7147
- Issue #2183: Simplify and optimize bytecode for list, dict and set
  comprehensions. Original patch for list comprehensions by Neal Norwitz.

7148 7149 7150 7151
- Issue #2467: gc.DEBUG_STATS reported invalid elapsed times. Also, always
  print elapsed times, not only when some objects are uncollectable /
  unreachable. Original patch by Neil Schemenauer.

7152 7153
- Issue #3439: Add a bit_length method to int.

7154 7155 7156 7157
- Issue #2173: When getting device encoding, check that return value of
  nl_langinfo is not the empty string.  This was causing silent build
  failures on OS X.

7158 7159 7160 7161
- Issue #4597: Fixed several opcodes that weren't always propagating
  exceptions.

- Issue #4589: Fixed exception handling when the __exit__ function of a
7162 7163
  context manager returns a value that cannot be converted to a bool.

7164 7165 7166 7167 7168
- Issue #4445: Replace "sizeof(PyBytesObject)" with
  "offsetof(PyBytesObject, ob_sval) + 1" when allocating memory for
  bytes instances.  On a typical machine this saves 3 bytes of memory
  (on average) per allocation of a bytes instance.

7169 7170 7171 7172
- Issue #4533: File read operation was dreadfully slow due to a slowly
  growing read buffer. Fixed by using the same growth rate algorithm as
  Python 2.x.

7173 7174 7175
- Issue #4509: Various issues surrounding resize of bytearray objects to
  which there are buffer exports (e.g. memoryview instances).

7176 7177 7178 7179
- Issue #4233: Changed semantic of ``_fileio.FileIO``'s ``close()``
  method on file objects with closefd=False. The file descriptor is still
  kept open but the file object behaves like a closed file. The ``FileIO``
  object also got a new readonly attribute ``closefd``.
7180

7181 7182 7183
- Issue #4569: Interpreter crash when mutating a memoryview with an item size
  larger than 1.

7184 7185
- Issue #4748: Lambda generators no longer return a value.

7186 7187
- The re.sub(), re.subn() and re.split() functions now accept a flags parameter.

7188 7189 7190 7191 7192
- Issue #5108: Handle %s like %S, %R and %A in PyUnicode_FromFormatV(): Call
  PyUnicode_DecodeUTF8() once, remember the result and output it in a second
  step. This avoids problems with counting UTF-8 bytes that ignores the effect
  of using the replace error handler in PyUnicode_DecodeUTF8().

Barry Warsaw's avatar
Barry Warsaw committed
7193 7194
Library
-------
7195

7196 7197 7198
- Issue #7071: byte-compilation in Distutils is now done with respect to
  sys.dont_write_bytecode.

7199
- Issue #7066: archive_util.make_archive now restores the cwd if an error is
7200 7201
  raised. Initial patch by Ezio Melotti.

7202
- Issue #6516: Added owner/group support when creating tar archives in
7203 7204
  Distutils.

7205 7206
- Issue #6954: Fixed crash when using DISTUTILS_DEBUG flag in Distutils.

7207 7208 7209 7210
- Issue #6163: Fixed HP-UX runtime library dir options in
  distutils.unixcompiler. Initial patch by Sridhar Ratnakumar and
  Michael Haubenwallner.

7211 7212
- Issue #6693: New functions in site.py to get user/global site packages paths.

7213 7214 7215 7216
- Issue #6511: ZipFile now raises BadZipfile (instead of an IOError) when
  opening an empty or very small file.

- Issue #6545: Removed assert statements in distutils.Extension, so the
7217 7218
  behavior is similar when used with -O.

7219 7220
- unittest has been split up into a package.  All old names should still work.

7221 7222 7223 7224 7225
- Issue #6466: now distutils.cygwinccompiler and distutils.emxccompiler
  uses the same refactored function to get gcc/ld/dllwrap versions numbers.
  It's `distutils.util.get_compiler_versions`. Added deprecation warnings
  for the obsolete get_versions() functions.

7226 7227 7228 7229
- Issue #6433: fixed issues with multiprocessing.pool.map hanging on empty list

- Issue #6314: logging: Extra checks on the "level" argument in more places.

Florent Xicluna's avatar
Typo.  
Florent Xicluna committed
7230
- Issue #2622: Fixed an ImportError when importing email.message from a
7231 7232
  standalone application built with py2exe or py2app.

7233
- Issue #6455: Fixed test_build_ext under win32.
7234

7235
- Issue #6377: Enabled the compiler option, and deprecate its usage as an
7236 7237
  attribute.

7238 7239
- Issue #6413: Fixed the log level in distutils.dist for announce.

7240 7241
- Issue #6403: Fixed package path usage in build_ext.

7242 7243 7244 7245
- Issues #5155, 5313, 5331: multiprocessing.Process._bootstrap was
  unconditionally calling "os.close(sys.stdin.fileno())" resulting in file
  descriptor errors

7246
- Issue #6365: Distutils build_ext inplace mode was copying the compiled
7247 7248
  extension in a subdirectory if the extension name had dots.

7249
- Issue #6164: Added an AIX specific linker argument in Distutils
7250 7251
  unixcompiler. Original patch by Sridhar Ratnakumar.

7252 7253 7254
- Issue #6286: Now Distutils upload command is based on urllib2 instead of
  httplib, allowing the usage of http_proxy.

7255 7256
- Issue #6287: Added the license field in Distutils documentation.

7257 7258
- Issue #6263: Fixed syntax error in distutils.cygwincompiler.

7259 7260 7261 7262
- Issue #5201: distutils.sysconfig.parse_makefile() now understands `$$`
  in Makefiles. This prevents compile errors when using syntax like:
  `LDFLAGS='-rpath=\$$LIB:/some/other/path'`. Patch by Floris Bruynooghe.

7263 7264 7265
- Issue #6131: test_modulefinder leaked when run after test_distutils.
  Patch by Hirokazu Yamamoto.

7266 7267
- Issue #6048: Now Distutils uses the tarfile module in archive_util.

7268
- Issue #6062: In distutils, fixed the package option of build_ext. Feedback
7269 7270
  and tests on pywin32 by Tim Golden.

7271 7272
- Issue #6053: Fixed distutils tests on win32. patch by Hirokazu Yamamoto.

7273 7274 7275
- Issue #6046: Fixed the library extension when distutils build_ext is used
  inplace. Initial patch by Roumen Petrov.

7276
- Issue #6041: Now distutils `sdist` and `register` commands use `check` as a
7277 7278
  subcommand.

7279 7280 7281
- Issue #6022: a test file was created in the current working directory by
  test_get_outputs in Distutils.

7282 7283 7284
- Issue #5977: distutils build_ext.get_outputs was not taking into account the
  inplace option. Initial patch by kxroberto.

7285 7286 7287
- Issue #5984: distutils.command.build_ext.check_extensions_list checks were broken
  for old-style extensions.

7288 7289
- Issue #5976: Fixed Distutils test_check_environ.

7290 7291 7292 7293 7294
- Issue #5941: Distutils build_clib command was not working anymore because
  of an incomplete costumization of the archiver command. Added ARFLAGS in the
  Makefile besides AR and make Distutils use it. Original patch by David
  Cournapeau.

7295 7296
- Issue #2245: aifc now skips chunk types it doesn't recognize, per spec.

7297
- Issue #5874: distutils.tests.test_config_cmd is not locale-sensitive
7298 7299
  anymore.

7300
- Issue #5810: Fixed Distutils test_build_scripts so it uses
7301 7302
  sysconfig.get_config_vars.

7303 7304
- Issue #4951: Fixed failure in test_httpservers.

Thomas Heller's avatar
Thomas Heller committed
7305 7306
- Issue #5795: Fixed test_distutils failure on Debian ppc.

7307 7308
- Issue #5607: fixed Distutils test_get_platform for Mac OS X fat binaries.

7309 7310 7311
- Issue #5741: don't disallow "%%" (which is an escape for "%") when setting
  a value in SafeConfigParser.

7312 7313
- Issue #5732: added a new command in Distutils: check.

7314
- Issue #5731: Distutils bdist_wininst no longer worked on non-Windows
7315 7316
  platforms. Initial patch by Paul Moore.

7317 7318 7319
- Issue #5095: Added bdist_msi to the list of bdist supported formats.
  Initial fix by Steven Bethard.

7320 7321 7322
- Issue #1491431: Fixed distutils.filelist.glob_to_re for edge cases.
  Initial fix by Wayne Davison.

7323
- Issue #5694: removed spurious test output in Distutils (test_clean).
7324

7325
- Issue #1326077: fix the formatting of SyntaxErrors by the traceback module.
7326

7327 7328 7329 7330
- Issue #1665206 (partially): Move imports in cgitb to the top of the module
  instead of performing them in functions. Helps prevent import deadlocking in
  threads.

7331 7332 7333 7334
- Issue #2522: locale.format now checks its first argument to ensure it has
  been passed only one pattern, avoiding mysterious errors where it appeared
  that it was failing to do localization.

7335 7336 7337
- Issue #5583: Added optional Extensions in Distutils. Initial patch by Georg
  Brandl.

7338 7339 7340
- Issue #1222: locale.format() bug when the thousands separator is a space
  character.

7341 7342 7343
- Issue #5472: Fixed distutils.test_util tear down. Original patch by
  Tim Golden.

7344 7345
- collections.deque() objects now have a read-only attribute called maxlen.

7346 7347 7348 7349
- Issue #2638: Show a window constructed with tkSimpleDialog.Dialog only after
  it is has been populated and properly configured in order to prevent
  window flashing.

7350 7351 7352 7353 7354 7355
- Issue #4792: Prevent a segfault in _tkinter by using the
  guaranteed to be safe interp argument given to the PythonCmd in place of
  the Tcl interpreter taken from a PythonCmd_ClientData.

- Issue #5193: Guarantee that tkinter.Text.search returns a string.

7356 7357 7358
- Issue #5394: removed > 2.3 syntax from distutils.msvc9compiler.
  Original patch by Akira Kitada.

7359 7360
- Issue #5334: array.fromfile() failed to insert values when EOFError was raised.

7361 7362
- Issue #5385: Fixed mmap crash after resize failure on windows.

7363 7364
- Issue #5179: Fixed subprocess handle leak on failure on windows.

Raymond Hettinger's avatar
Raymond Hettinger committed
7365 7366
- PEP 372:  Added collections.OrderedDict().

7367 7368
- The _asdict() for method for namedtuples now returns an OrderedDict().

7369 7370
- configparser now defaults to using an ordered dictionary.

Benjamin Peterson's avatar
Benjamin Peterson committed
7371 7372 7373
- Issue #5401: Fixed a performance problem in mimetypes when ``from mimetypes
  import guess_extension`` was used.

7374 7375 7376
- Issue #1733986: Fixed mmap crash in accessing elements of second map object
  with same tagname but larger size than first map. (Windows)

7377 7378 7379
- Issue #5386: mmap.write_byte didn't check map size, so it could cause buffer
  overrun.

7380
- Issue #1533164: Installed but not listed ``*.pyo`` was breaking Distutils
7381 7382 7383 7384
  bdist_rpm command.

- Issue #5378: added --quiet option to Distutils bdist_rpm command.

7385 7386
- Issue #5052: make Distutils compatible with 2.3 again.

7387 7388
- Issue #5316: Fixed buildbot failures introduced by multiple inheritance
  in Distutils tests.
Barry Warsaw's avatar
Barry Warsaw committed
7389

7390 7391 7392
- Issue #5287: Add exception handling around findCaller() call to help out
  IronPython.

7393 7394 7395 7396 7397
- Issue #5282: Fixed mmap resize on 32bit windows and unix. When offset > 0,
  The file was resized to wrong size.

- Issue #5292: Fixed mmap crash on its boundary access m[len(m)].

7398
- Issue #2279: distutils.sdist.add_defaults now add files
7399 7400
  from the package_data and the data_files metadata.

7401
- Issue #5257: refactored all tests in distutils, so they use
7402 7403
  support.TempdirManager, to avoid writing in the tests directory.

7404 7405 7406
- Issue #4524: distutils build_script command failed with --with-suffix=3.
  Initial patch by Amaury Forgeot d'Arc.

7407 7408
- Issue #2461: added tests for distutils.util

7409 7410 7411 7412
- Issue #4998: The memory saving effect of __slots__ had been lost on Fractions
  which inherited from numbers.py which did not have __slots__ defined.  The
  numbers hierarchy now has its own __slots__ declarations.

7413 7414 7415
- Issue #4631: Fix urlopen() result when an HTTP response uses chunked
  encoding.

7416 7417 7418
- Issue #5203: Fixed ctypes segfaults when passing a unicode string to a
  function without argtypes (only occurs if HAVE_USABLE_WCHAR_T is false).

7419 7420 7421
- Issue #3386: distutils.sysconfig.get_python_lib prefix argument was ignored
  under NT and OS2. Patch by Philip Jenvey.

7422 7423 7424 7425
- Issue #5128: Make compileall properly inspect bytecode to determine if needs
  to be recreated. This avoids a timing hole thanks to the old reliance on the
  ctime of the files involved.

7426 7427 7428
- Issue #5122: Synchronize tk load failure check to prevent a potential
  deadlock.

7429 7430 7431 7432
- Issue #1818: collections.namedtuple() now supports a keyword argument
  'rename' which lets invalid fieldnames be automatically converted to
  positional names in the form, _1, _2, ...

7433 7434
- Issue #4890: Handle empty text search pattern in Tkinter.Text.search.

7435 7436 7437
- Issue #4512 (part 2): Promote ``ZipImporter._get_filename()`` to be a
  public documented method ``ZipImporter.get_filename()``.

7438 7439 7440 7441 7442
- Issue #4195: The ``runpy`` module (and the ``-m`` switch) now support
  the execution of packages by looking for and executing a ``__main__``
  submodule when a package name is supplied. Initial patch by Andi
  Vajda.

7443 7444 7445 7446 7447
- Issue #1731706: Call Tcl_ConditionFinalize for Tcl_Conditions that will
  not be used again (this requires Tcl/Tk 8.3.1), also fix a memory leak in
  Tkapp_Call when calling from a thread different than the one that created
  the Tcl interpreter. Patch by Robert Hancock.

7448 7449 7450
- Issue #4285: Change sys.version_info to be a named tuple. Patch by
  Ross Light.

7451
- Issue #1520877: Now distutils.sysconfig reads $AR from the
7452 7453
  environment/Makefile. Patch by Douglas Greiman.

7454 7455 7456
- Issue #1276768: The verbose option was not used in the code of
  distutils.file_util and distutils.dir_util.

7457
- Issue #5132: Fixed trouble building extensions under Solaris with
7458 7459
  --enabled-shared activated. Initial patch by Dave Peterson.

7460 7461
- Issue #1581476: Always use the Tcl global namespace when calling into Tcl.

7462 7463
- The shelve module now defaults to pickle protocol 3.

7464 7465 7466
- Fix a bug in the trace module where a bytes object from co_lnotab had its
  items being passed through ord().

7467 7468 7469 7470
- Issue #2047: shutil.move() could believe that its destination path was
  inside its source path if it began with the same letters (e.g. "src" vs.
  "src.new").

7471 7472
- Added the ttk module. See issue #2983: Ttk support for Tkinter.

7473 7474 7475 7476
- Removed isSequenceType(), isMappingType, and isNumberType() from the
  operator module; use the abstract base classes instead.  Also removed
  the repeat() function; use mul() instead.

7477
- Issue #5021:  doctest.testfile() did not create __name__ and
7478 7479 7480 7481 7482
  collections.namedtuple() relied on __name__ being defined.

- Backport importlib from Python 3.1. Only the import_module() function has
  been backported to help facilitate transitions from 2.7 to 3.1.

7483 7484 7485
- Issue #1885: distutils. When running sdist with --formats=tar,gztar
  the tar file was overriden by the gztar one.

7486 7487
- Issue #4863: distutils.mwerkscompiler has been removed.

7488 7489
- Added a new itertools functions:  combinations_with_replacement()
  and compress().
7490

7491
- Issue #5032:  added a step argument to itertools.count() and
7492 7493
  allowed non-integer arguments.

Jesse Noller's avatar
Jesse Noller committed
7494 7495 7496 7497
- Fix and properly document the multiprocessing module's logging
  support, expose the internal levels and provide proper usage
  examples.

7498 7499 7500
- Issue #1672332: fix unpickling of subnormal floats, which was
  producing a ValueError on some platforms.

7501 7502 7503
- Issue #3881: Help Tcl to load even when started through the
  unreadable local symlink to "Program Files" on Vista.

7504 7505 7506
- Issue #4710: Extract directories properly in the zipfile module;
  allow adding directories to a zipfile.

7507
- Issue #3807: _multiprocessing build fails when configure is passed
Jesse Noller's avatar
Jesse Noller committed
7508 7509 7510
  --without-threads argument. When this occurs, _multiprocessing will
  be disabled, and not compiled.

7511 7512 7513 7514 7515
- Issue #5008: When a file is opened in append mode with the new IO library,
  do an explicit seek to the end of file (so that e.g. tell() returns the
  file size rather than 0). This is consistent with the behaviour of the
  traditional 2.x file object.

7516 7517 7518
- Issue #5013: Fixed a bug in FileHandler which occurred when the delay
  parameter was set.

7519 7520 7521
- Issue #4842: Always append a trailing 'L' when pickling longs using
  pickle protocol 0.  When reading, the 'L' is optional.

7522 7523
- Add the importlib package.

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- Issue #4301: Patch the logging module to add processName support, remove
  _check_logger_class from multiprocessing.

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- Issue #3325: Remove python2.x try: except: imports for old cPickle from
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  multiprocessing.
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- Issue #4959: inspect.formatargspec now works for keyword only arguments
  without defaults.

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- Issue #3321: ``_multiprocessing.Connection()`` doesn't check handle; added checks
  for Unix machines for negative handles and large int handles. Without this check
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  it is possible to segfault the interpreter.

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- Issue #4449: AssertionError in mp_benchmarks.py, caused by an underlying issue
  in sharedctypes.py.

- Issue #1225107: inspect.isclass() returned True for instances with a custom
  __getattr__.

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- Issue #3826 and #4791: The socket module now closes the underlying socket
  appropriately when it is being used via socket.makefile() objects
  rather than delaying the close by waiting for garbage collection to do it.

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- Issue #1696199:  Add collections.Counter() for rapid and convenient
  counting.

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- Issue #3860: GzipFile and BZ2File now support the context manager protocol.

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- Issue #4867: Fixed a crash in ctypes when passing a string to a
  function without defining argtypes.

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- Issue #4272: Add an optional argument to the GzipFile constructor to override
  the timestamp in the gzip stream. The default value remains the current time.
  The information can be used by e.g. gunzip when decompressing. Patch by
  Jacques Frechet.

7560 7561
- Restore Python 2.3 compatibility for decimal.py.

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- Issue #3638: Remove functions from _tkinter module level that depend on
  TkappObject to work with multiple threads.

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- Issue #4718: Adapt the wsgiref package so that it actually works with
  Python 3.x, in accordance with the `official amendments of the spec
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  <http://www.wsgi.org/wsgi/Amendments_1.0>`_.

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- Issue #4796: Added Decimal.from_float() and Context.create_decimal_from_float()
  to the decimal module.

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- Fractions.from_float() no longer loses precision for integers too big to
  cast as floats.

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- Issue #4812: add missing underscore prefix to some internal-use-only
  constants in the decimal module.  (Dec_0 becomes _Dec_0, etc.)

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- Issue #4790: The nsmallest() and nlargest() functions in the heapq module
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  did unnecessary work in the common case where no key function was specified.

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- Issue #4795: inspect.isgeneratorfunction() returns False instead of None when
  the function is not a generator.

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- Issue #4702: Throwing a DistutilsPlatformError instead of IOError in case
  no MSVC compiler is found under Windows. Original patch by Philip Jenvey.
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- Issue #4646: distutils was choking on empty options arg in the setup
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  function. Original patch by Thomas Heller.

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- Issue #3767: Convert Tk object to string in tkColorChooser.

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- Issue #3248: Allow placing ScrolledText in a PanedWindow.

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- Issue #4444: Allow assertRaises() to be used as a context handler, so that
  the code under test can be written inline if more practical.

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- Issue #4739: Add pydoc help topics for symbols, so that e.g. help('@')
  works as expected in the interactive environment.

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- Issue #4756: zipfile.is_zipfile() now supports file-like objects. Patch by
  Gabriel Genellina.

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- Issue #4574: reading an UTF16-encoded text file crashes if \r on 64-char
  boundary.

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- Issue #4223: inspect.getsource() will now correctly display source code
  for packages loaded via zipimport (or any other conformant PEP 302
  loader). Original patch by Alexander Belopolsky.

- Issue #4201: pdb can now access and display source code loaded via
  zipimport (or any other conformant PEP 302 loader). Original patch by
  Alexander Belopolsky.

- Issue #4197: doctests in modules loaded via zipimport (or any other PEP
  302 conformant loader) will now work correctly in most cases (they
  are still subject to the constraints that exist for all code running
  from inside a module loaded via a PEP 302 loader and attempting to
  perform IO operations based on __file__). Original patch by
  Alexander Belopolsky.

- Issues #4082 and #4512: Add runpy support to zipimport in a manner that
  allows backporting to maintenance branches. Original patch by
  Alexander Belopolsky.

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- Issue #4163: textwrap module: allow word splitting on a hyphen preceded by
  a non-ASCII letter.

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- Issue #4616: TarFile.utime(): Restore directory times on Windows.

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- Issue #4021: tokenize.detect_encoding() now raises a SyntaxError when the
  codec cannot be found.  This is for compatibility with the builtin behavior.

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- Issue #4084: Fix max, min, max_mag and min_mag Decimal methods to
  give correct results in the case where one argument is a quiet NaN
  and the other is a finite number that requires rounding.

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- Issue #4483: _dbm module now builds on systems with gdbm & gdbm_compat
  libs.

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- Added the subprocess.check_call_output() convenience function to get output
  from a subprocess on success or raise an exception on error.

- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
  support unusual filenames (such as those containing semi-colons) in
  Content-Disposition headers.

- Issue #4384: Added logging integration with warnings module using
  captureWarnings(). This change includes a NullHandler which does nothing;
  it will be of use to library developers who want to avoid the "No handlers
  could be found for logger XXX" message which can appear if the library user
  doesn't configure logging.

- Issue #3741: DISTUTILS_USE_SDK set causes msvc9compiler.py to raise an
  exception.

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- Issue #4529: fix the parser module's validation of try-except-finally
  statements.

- Issue #4458: getopt.gnu_getopt() now recognizes a single "-" as an argument,
  not a malformed option.

- Added the subprocess.check_output() convenience function to get output
  from a subprocess on success or raise an exception on error.

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- Issue #4542: On Windows, binascii.crc32 still accepted str as binary input;
  the corresponding tests now pass.

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- Issue #4537: webbrowser.UnixBrowser would fail to open the browser because
  it was calling the wrong open() function.

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- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
  support unusual filenames (such as those containing semi-colons) in
  Content-Disposition headers.

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- Issue #4861: ctypes.util.find_library(): Robustify. Fix library detection on
  biarch systems. Try to rely on ldconfig only, without using objdump and gcc.

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- Issue #5104: The socket module now raises OverflowError when 16-bit port and
  protocol numbers are supplied outside the allowed 0-65536 range on bind()
  and getservbyport().

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- Windows locale mapping updated to Vista.

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Tools/Demos
-----------

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- Issue #4704: remove use of cmp() in pybench, bump its version number to 2.1,
  and make it 2.6-compatible.

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- Ttk demos added in Demo/tkinter/ttk/

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- Issue #4677: add two list comprehension tests to pybench.

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Build
-----

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- Issue #6094: Build correctly with Subversion 1.7.

7700 7701
- Issue #5847: Remove -n switch on "Edit with IDLE" menu item.

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- Issue #5726: Make Modules/ld_so_aix return the actual exit code of the
  linker, rather than always exit successfully. Patch by Floris Bruynooghe.

7705
- Issue #4587: Add configure option --with-dbmliborder=db1:db2:... to specify
7706
  the order that backends for the dbm extension are checked.
7707

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- Link the shared python library with $(MODLIBS).

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- Issue #5134: Silence compiler warnings when compiling sqlite with VC++.

7712 7713
- Issue #4494: Fix build with Py_NO_ENABLE_SHARED on Windows.

7714 7715
- Issue #4895: Use _strdup on Windows CE.

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- Issue #4472: "configure --enable-shared" now works on OSX

- Issues #4728 and #4060: WORDS_BIGEDIAN is now correct in Universal builds.

- Issue #4389: Add icon to the uninstall entry in "add-and-remove-programs".

- Issue #4289: Remove Cancel button from AdvancedDlg.

- Issue #1656675: Register a drop handler for .py* files on Windows.

- Issue #4120: Exclude manifest from extension modules in VS2008.

- Issue #4091: Install pythonxy.dll in system32 again.

- Issue #4018: Disable "for me" installations on Vista.

- Issue #3758: Add ``patchcheck`` build target to .PHONY.

- Issue #4204: Fixed module build errors on FreeBSD 4.


C-API
-----

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- Issue #6624: yArg_ParseTuple with "s" format when parsing argument with
  NUL: Bogus TypeError detail string.

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- Issue #5175: PyLong_AsUnsignedLongLong now raises OverflowError
  for negative arguments.  Previously, it raised TypeError.

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- Issue #4720: The format for PyArg_ParseTupleAndKeywords can begin with '|'.

- Issue #3632: from the gdb debugger, the 'pyo' macro can now be called when
  the GIL is released, or owned by another thread.

- Issue #4122: On Windows, fix a compilation error when using the
  Py_UNICODE_ISSPACE macro in an extension module.


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Extension Modules
-----------------

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- Issue #3745: Fix hashlib to always reject unicode and non buffer-api
  supporting objects as input no matter how it was compiled (built in
  implementations or external openssl library).

7762 7763
- Issue #4397: Fix occasional test_socket failure on OS X.

7764 7765
- Issue #4279: Fix build of parsermodule under Cygwin.

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- Issue #4751: hashlib now releases the GIL when hashing large buffers
  (with a hardwired threshold of 2048 bytes), allowing better parallelization
  on multi-CPU systems. Contributed by Lukas Lueg (ebfe) and Victor Stinner.

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- Issue #4051: Prevent conflict of UNICODE macros in cPickle.

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- Issue #4738: Each zlib object now has a separate lock, allowing to compress
  or decompress several streams at once on multi-CPU systems. Also, the GIL
  is now released when computing the CRC of a large buffer. Patch by ebfe.

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- Issue #4228: Pack negative values the same way as 2.4 in struct's L format.

7778 7779
- Issue #1040026: Fix os.times result on systems where HZ is incorrect.

7780 7781
- Issues #3167, #3682: Fix test_math failures for log, log10 on Solaris,
  OpenBSD.
7782

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- Issue #4583: array.array would not always prohibit resizing when a buffer
  has been exported, resulting in an interpreter crash when accessing the
  buffer.

7787

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- Issue #5228: Make functools.partial objects can now be pickled.

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Tests
-----

7793 7794 7795
- Issue #6152: New option '-j'/'--multiprocess' for regrtest allows running
  regression tests in parallel, shortening the total runtime.

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- Issue #5450: Moved tests involving loading tk from Lib/test/test_tcl to
  Lib/tkinter/test/test_tkinter/test_loadtk. With this, these tests demonstrate
  the same behaviour as test_ttkguionly (and now also test_tk) which is to
  skip the tests if DISPLAY is defined but can't be used.

7801
- regrtest no longer treats ImportError as equivalent to SkipTest.  Imports
7802
  that should cause a test to be skipped are now done using import_module
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  from test support, which does the conversion.

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- Issue #5083: New 'gui' resource for regrtest.


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Docs
----

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**(For information about older versions, consult the HISTORY file.)**