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What's New in Python 3.2 Beta 2?
================================

*Release date: XXXX-XX-XX*

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

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- Issue #8844: Regular and recursive lock acquisitions can now be interrupted
  by signals on platforms using pthreads.  Patch by Reid Kleckner.

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- 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__.
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- Issue #5587: add a repr to dict_proxy objects.  Patch by David Stanek and
  Daniel Urban.

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Library
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- 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.

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- Issue #10573: use actual/expected consistently in unittest methods.
  The order of the args of assertCountEqual is also changed.

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- Issue #9286: email.utils.parseaddr no longer concatenates blank-separated
  words in the local part of email addresses, thereby preserving the input.

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- Issue #6791: Limit header line length (to 65535 bytes) in http.client
  and http.server, to avoid denial of services from the other party.

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- 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
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  rl_initialize first, then setting our custom defaults, then reading .editrc.

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- Issue #4188: Avoid creating dummy thread objects when logging operations
  from the threading module (with the internal verbose flag activated).

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- Issue #10711: Remove HTTP 0.9 support from http.client.  The ``strict``
  parameter to HTTPConnection and friends is deprecated.

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- Issue #9721: Fix the behavior of urljoin when the relative url starts with a
  ';' character. Patch by Wes Chow.
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- Issue #10714: Limit length of incoming request in http.server to 65536 bytes
  for security reasons.  Initial patch by Ross Lagerwall.

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- Issue #9558: Fix distutils.command.build_ext with VS 8.0.

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- Issue #10667: Fast path for collections.Counter().

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- Issue #10695: passing the port as a string value to telnetlib no longer
  causes debug mode to fail.

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- Issue #1078919: add_header now automatically RFC2231 encodes parameters
  that contain non-ascii values.

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- Issue #10188 (partial resolution): tempfile.TemporaryDirectory emits
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  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__.

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- Issue #10107: Warn about unsaved files in IDLE on OSX.

- Issue #7213: subprocess.Popen's default for close_fds has been changed.
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  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.
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- 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.

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Tests
-----

- Issue #775964: test_grp now skips YP/NIS entries instead of failing when
  encountering them.

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Tools/Demos
-----------

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- Issue #6075: IDLE on Mac OS X now works with both Carbon AquaTk and
  Cocoa AquaTk.

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- Issue #10710: ``Misc/setuid-prog.c`` is removed from the source tree.

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- Issue #10706: Remove outdated script runtests.sh.  Either ``make test``
  or ``python -m test`` should be used instead.

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Build
-----

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- The Windows build now uses Tcl/Tk 8.5.9 and sqlite3 3.7.4.
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- Issue #9234: argparse supports alias names for subparsers.

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What's New in Python 3.2 Beta 1?
================================

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*Release date: 05-Dec-2010*
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Core and Builtins
-----------------
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- Issue #10630: Return dict views from the dict proxy keys()/values()/items()
  methods.

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- 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.
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- Issue #1772833: Add the -q command-line option to suppress copyright and
  version output in interactive mode.
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- Provide an *optimize* parameter in the built-in compile() function.

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- Fixed several corner case issues on Windows in os.stat/os.lstat related to
  reparse points.
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- PEP 384 (Defining a Stable ABI) is implemented.

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- Issue #2690: Range objects support negative indices and slicing.
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- Issue #9915: Speed up sorting with a key.

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- Issue #8685: Speed up set difference ``a - b`` when source set ``a`` is much
  larger than operand ``b``.  Patch by Andrew Bennetts.
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- Issue #10518: Bring back the callable() builtin.

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- 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.
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- Issue #10474: range.count() should return integers.
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- Issue #1574217: isinstance now catches only AttributeError, rather than
  masking all errors.

Library
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- logging: added "handler of last resort". See http://bit.ly/last-resort-handler

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- test.support: Added TestHandler and Matcher classes for better support of
  assertions about logging.

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- Issue #4391: Use proper plural forms in argparse.

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- Issue #10601: sys.displayhook uses 'backslashreplace' error handler on
  UnicodeEncodeError.

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- Add the "display" and "undisplay" pdb commands.

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- Issue #7245: Add a SIGINT handler in pdb that allows to break a program again
  after a "continue" command.
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- Add the "interact" pdb command.

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- Issue #7905: Actually respect the keyencoding parameter to shelve.Shelf.

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- Issue #1569291: Speed up array.repeat().

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- Provide an interface to set the optimization level of compilation in
  py_compile, compileall and zipfile.PyZipFile.

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- 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.

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- Issue #6045: dbm.gnu databases now support get() and setdefault() methods.

- Issue #10620: `python -m unittest` can accept file paths instead of module
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  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.

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- Issue #10272: The ssl module now raises socket.timeout instead of a generic
  SSLError on socket timeouts.

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- Issue #10528: Allow translators to reorder placeholders in localizable
  messages from argparse.

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- Issue #10497: Fix incorrect use of gettext in argparse.

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- 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.

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- logging: Added getLogRecordFactory/setLogRecordFactory with docs and tests.

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- Issue #10549: Fix pydoc traceback when text-documenting certain classes.

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- Issue #2001: New HTML server with enhanced Web page features.  Patch by Ron
  Adam.

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- Issue #10360: In WeakSet, do not raise TypeErrors when testing for membership
  of non-weakrefable objects.
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- Issue #940286: pydoc.Helper.help() ignores input/output init parameters.

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- Issue #1745035: Add a command size and data size limit to smtpd.py, to prevent
  DoS attacks.  Patch by Savio Sena.
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- Issue #4925: Add filename to error message when executable can't be found in
  subprocess.

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- Issue #10391: Don't dereference invalid memory in error messages in the ast
  module.

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- Issue #10027: st_nlink was not being set on Windows calls to os.stat or
  os.lstat. Patch by Hirokazu Yamamoto.
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- 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.
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- Issue #8879: Add os.link support for Windows.
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- Issue #7911: ``unittest.TestCase.longMessage`` defaults to True for improved
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  failure messages by default. Patch by Mark Roddy.
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- Issue #1486713: HTMLParser now has an optional tolerant mode where it tries to
  guess at the correct parsing of invalid html.
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- Issue #10554: Add context manager support to subprocess.Popen objects.

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- Issue #8989: email.utils.make_msgid now has a domain parameter that can
  override the domain name used in the generated msgid.

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- 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.
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- Issue #9573: os.fork() now works correctly when triggered as a side effect of
  a module import.
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- Issue #10464: netrc now correctly handles lines with embedded '#' characters.

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- Added itertools.accumulate().

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- Issue #4113: Added custom ``__repr__`` method to ``functools.partial``.
  Original patch by Daniel Urban.

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- Issue #10273: Rename `assertRegexpMatches` and `assertRaisesRegexp` to
  `assertRegex` and `assertRaisesRegex`.

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- Issue #10535: Enable silenced warnings in unittest by default.

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- Issue #9873: The URL parsing functions in urllib.parse now accept ASCII byte
  sequences as input in addition to character strings.
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- Issue #10586: The statistics API for the new functools.lru_cache has been
  changed to a single cache_info() method returning a named tuple.
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- Issue #10323: itertools.islice() now consumes the minimum number of inputs
  before stopping.  Formerly, the final state of the underlying iterator was
  undefined.
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- Issue #10565: The collections.Iterator ABC now checks for both __iter__ and
  __next__.
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- Issue #10242: Fixed implementation of unittest.ItemsEqual and gave it a new
  more informative name, unittest.CountEqual.
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- Issue #10561: In pdb, clear the breakpoints by the breakpoint number.

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- Issue #2986: difflib.SequenceMatcher gets a new parameter, autojunk, which can
  be set to False to turn off the previously undocumented 'popularity'
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  heuristic. Patch by Terry Reedy and Eli Bendersky.

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- Issue #10534: expose bjunk and bpopular sets; deprecate undocumented and now
  redundant isbjunk and isbpopular methods.

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- Issue #9846: zipfile is now correctly closing underlying file objects.

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- Issue #10459: Update CJK character names to Unicode 6.0.

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- Issue #4493: urllib.request adds '/' in front of path components which does not
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  start with '/. Common behavior exhibited by browsers and other clients.

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- Issue #6378: idle.bat now runs with the appropriate Python version rather than
  the system default. Patch by Sridhar Ratnakumar.

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- Issue #10470: 'python -m unittest' will now run test discovery by default,
  when no extra arguments have been provided.

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- 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.

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- Issue #10220: Added inspect.getgeneratorstate. Initial patch by Rodolpho
  Eckhardt.
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- Issue #10453: compileall now uses argparse instead of getopt, and thus
  provides clean output when called with '-h'.

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- Issue #8078: Add constants for higher baud rates in the termios module.  Patch
  by Rodolpho Eckhardt.
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- Issue #10407: Fix two NameErrors in distutils.

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- Issue #10371: Deprecated undocumented functions in the trace module.
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- Issue #10467: Fix BytesIO.readinto() after seeking into a position after the
  end of the file.

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- configparser: 100% test coverage.

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- Issue #10499: configparser supports pluggable interpolation handlers. The
  default classic interpolation handler is called BasicInterpolation. Another
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  interpolation handler added (ExtendedInterpolation) which supports the syntax
  used by zc.buildout (e.g. interpolation between sections).

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- 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.
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- configparser: Usage of RawConfigParser is now discouraged for new projects
  in favor of ConfigParser(interpolation=None).

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- 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.

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- 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).
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- configparser: accepted INI file structure is now customizable, including
  comment prefixes, name of the DEFAULT section, empty lines in multiline
  values, and indentation.

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- Issue 10326: unittest.TestCase instances can be pickled.

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- Issue 9926: Wrapped TestSuite subclass does not get __call__ executed.

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- 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.
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- Issue #9732: Addition of getattr_static to the inspect module.

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- Issue #10446: Module documentation generated by pydoc now links to a
  version-specific online reference manual.

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- Make the 'No module named' exception message from importlib consistent.

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- Issue #10443: Add the SSLContext.set_default_verify_paths() method.

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- Issue #10440: Support RUSAGE_THREAD as a constant in the resource module.
  Patch by Robert Collins.

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- Issue #10429: IMAP.starttls() stored the capabilities as bytes objects, rather
  than strings.
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C-API
-----

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- Issue #10557: Added a new API function, PyUnicode_TransformDecimalToASCII(),
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  which transforms non-ASCII decimal digits in a Unicode string to their ASCII
  equivalents.
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- Issue #9518: Extend the PyModuleDef_HEAD_INIT macro to explicitly
  zero-initialize all fields, fixing compiler warnings seen when building
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  extension modules with gcc with "-Wmissing-field-initializers" (implied by
  "-W").
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- Issue #10255: Fix reference leak in Py_InitializeEx().  Patch by Neil
  Schemenauer.

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- structseq.h is now included in Python.h.

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- Loosen PyArg_ValidateKeywordArguments to allow dict subclasses.

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Tests
-----

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- regrtest.py once again ensures the test directory is removed from sys.path
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  when it is invoked directly as the __main__ module.
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- `python -m test` can be used to run the test suite as well as `python -m
  test.regrtest`.
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- Do not fail test_socket when the IP address of the local hostname cannot be
  looked up.
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- Issue #8886: Use context managers throughout test_zipfile. Patch by Eric
  Carstensen.
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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.

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Documentation
-------------

- Issue #10299: List the built-in functions in a table in functions.rst.

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What's New in Python 3.2 Alpha 4?
=================================
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*Release date: 13-Nov-2010*
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Core and Builtins
-----------------

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- 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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- Issue #10293: Remove obsolete field in the PyMemoryView structure, unused
  undocumented value PyBUF_SHADOW, and strangely-looking code in
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  PyMemoryView_GetContiguous.

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- Issue #6081: Add str.format_map(), similar to ``str.format(**mapping)``.
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- If FileIO.__init__ fails, close the file descriptor.

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- 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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- Issue #5437: A preallocated MemoryError instance should not keep traceback
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  data (including local variables caught in the stack trace) alive infinitely.

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- Issue #10186: Fix the SyntaxError caret when the offset is equal to the length
  of the offending line.

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- Issue #10089: Add support for arbitrary -X options on the command line.  They
  can be retrieved through a new attribute ``sys._xoptions``.
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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
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  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
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  encoding and to encode command line arguments on this OS.

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- Issue #9713, #10114: Parser functions (e.g. PyParser_ASTFromFile) expect
  filenames encoded to the filesystem encoding with the surrogateescape error
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  handler (to support undecodable bytes), instead of UTF-8 in strict mode.

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- Issue #9997: Don't let the name "top" have special significance in scope
  resolution.

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- Issue #9862: Compensate for broken PIPE_BUF in AIX by hard coding its value as
  the default 512 when compiling on AIX.
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- Use locale encoding instead of UTF-8 to encode and decode filenames if
  Py_FileSystemDefaultEncoding is not set.

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- Issue #10095: fp_setreadl() doesn't reopen the file, instead reuse the file
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  descriptor.

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- Issue #9418: Moved private string methods ``_formatter_parser`` and
  ``_formatter_field_name_split`` into a new ``_string`` module.

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- Issue #9992: Remove PYTHONFSENCODING environment variable.

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Library
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- Issue #10465: fix broken delegating of attributes by gzip._PaddedFile.

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- Issue #10356: Decimal.__hash__(-1) should return -2.

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- Issue #1553375: logging: Added stack_info kwarg to display stack information.

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- Issue #5111: IPv6 Host in the Header is wrapped inside [ ]. Patch by Chandru.

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- Fix Fraction.__hash__ so that Fraction.__hash__(-1) is -2.  (See also issue
  #10356.)
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- Issue #4471: Add the IMAP.starttls() method to enable encryption on standard
  IMAP4 connections.  Original patch by Lorenzo M. Catucci.
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- Issue #1466065: Add 'validate' option to base64.b64decode to raise an error if
  there are non-base64 alphabet characters in the input.
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- 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 *``.
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- Issue #4471: Properly shutdown socket in IMAP.shutdown().  Patch by Lorenzo
  M. Catucci.
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- Fix IMAP.login() to work properly.

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- Issue #9244: multiprocessing pool worker processes could terminate
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  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
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  ``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.
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- Issue #10022: The dictionary returned by the ``getpeercert()`` method of SSL
  sockets now has additional items such as ``issuer`` and ``notBefore``.
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- ``usenetrc`` is now false by default for NNTP objects.

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- Issue #1926: Add support for NNTP over SSL on port 563, as well as STARTTLS.
  Patch by Andrew Vant.
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- Issue #10335: Add tokenize.open(), detect the file encoding using
  tokenize.detect_encoding() and open it in read only mode.
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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.
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- 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.

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- Issue #10329: The trace module writes reports using the input Python script
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  encoding, instead of the locale encoding.  Patch written by Alexander
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  Belopolsky.

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- Issue #10126: Fix distutils' test_build when Python was built with
  --enable-shared.

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- Issue #9281: Prevent race condition with mkdir in distutils.  Patch by
  Arfrever.

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- Issue #10229: Fix caching error in gettext.

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- Issue #10252: Close file objects in a timely manner in distutils code and
  tests.  Patch by Brian Brazil, completed by Éric Araujo.

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- Issue #10180: Pickling file objects is now explicitly forbidden, since
  unpickling them produced nonsensical results.

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- Issue #10311: The signal module now restores errno before returning from its
  low-level signal handler.  Patch by Hallvard B Furuseth.
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- Issue #10282: Add a ``nntp_implementation`` attribute to NNTP objects.

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- Issue #10283: Add a ``group_pattern`` argument to NNTP.list().

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- Issue #10155: Add IISCGIHandler to wsgiref.handlers to support IIS CGI
  environment better, and to correct unicode environment values for WSGI 1.0.1.
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- Issue #10281: nntplib now returns None for absent fields in the OVER/XOVER
  response, instead of raising an exception.

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- 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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  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.)
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- Issue #10280: NNTP.nntp_version should reflect the highest version advertised
  by the server.
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- Issue #10184: Touch directories only once when extracting a tarfile.

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- Issue #10199: New package, ``turtledemo`` now contains selected demo scripts
  that were formerly found under Demo/turtle.
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- Issue #10265: Close file objects explicitly in sunau.  Patch by Brian Brazil.

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- Issue #10266: uu.decode didn't close in_file explicitly when it was given as a
  filename.  Patch by Brian Brazil.
587

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- Issue #10110: Queue objects didn't recognize full queues when the maxsize
  parameter had been reduced.
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- Issue #10160: Speed up operator.attrgetter.  Patch by Christos Georgiou.

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- logging: Added style option to basicConfig() to allow %, {} or $-formatting.

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- Issue #5729: json.dumps() now supports using a string such as '\t' for
  pretty-printing multilevel objects.
597

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- Issue #10253: FileIO leaks a file descriptor when trying to open a file for
  append that isn't seekable.  Patch by Brian Brazil.
600

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- Support context manager protocol for file-like objects returned by mailbox
  ``get_file()`` methods.
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- Issue #10246: uu.encode didn't close file objects explicitly when filenames
  were given to it.  Patch by Brian Brazil.

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- Issue #10198: fix duplicate header written to wave files when writeframes() is
  called without data.
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- Close file objects in modulefinder in a timely manner.

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- 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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- Issue #10233: Close file objects in a timely manner in the tarfile module and
  its test suite.
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- Issue #10093: ResourceWarnings are now issued when files and sockets are
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  deallocated without explicit closing.  These warnings are silenced by default,
  except in pydebug mode.
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- tarfile.py: Add support for all missing variants of the GNU sparse extensions
  and create files with holes when extracting sparse members.
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- Issue #10218: Return timeout status from ``Condition.wait`` in threading.

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- Issue #7351: Add ``zipfile.BadZipFile`` spelling of the exception name and
  deprecate the old name ``zipfile.BadZipfile``.
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- 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.

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- Issue #5975: Add csv.unix_dialect class.

- Issue #7761: telnetlib.interact failures on Windows fixed.
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- logging: Added style option to Formatter to allow %, {} or $-formatting.

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- Issue #5178: Added tempfile.TemporaryDirectory class that can be used as a
  context manager.
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- Issue #1349106: Generator (and BytesGenerator) flatten method and Header
  encode method now support a 'linesep' argument.

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- 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.
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- Issue #10166: Avoid recursion in pstats Stats.add() for many stats items.

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- Issue #10163: Skip unreadable registry keys during mimetypes initialization.
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- logging: Made StreamHandler terminator configurable.

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- logging: Allowed filters to be just callables.

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- logging: Added tests for _logRecordClass changes.

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- Issue #10092: Properly reset locale in calendar.Locale*Calendar classes.

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- logging: Added _logRecordClass, getLogRecordClass, setLogRecordClass to
  increase flexibility of LogRecord creation.

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- Issue #5117: Case normalization was needed on ntpath.relpath().  Also fixed
  root directory issue on posixpath.relpath().  (Ported working fixes from
  ntpath.)
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- Issue #1343: xml.sax.saxutils.XMLGenerator now has an option
  short_empty_elements to direct it to use self-closing tags when appropriate.

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- Issue #9807 (part 1): Expose the ABI flags in sys.abiflags.  Add --abiflags
  switch to python-config for command line access.

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- Issue #6098: Don't claim DOM level 3 conformance in minidom.

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- Issue #5762: Fix AttributeError raised by ``xml.dom.minidom`` when an empty
  XML namespace attribute is encountered.

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- Issue #2830: Add the ``html.escape()`` function, which quotes all problematic
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  characters by default.  Deprecate ``cgi.escape()``.
685

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- Issue #9409: Fix the regex to match all kind of filenames, for interactive
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  debugging in doctests.

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- Issue #9183: ``datetime.timezone(datetime.timedelta(0))`` will now return the
  same instance as ``datetime.timezone.utc``.
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- Issue #7523: Add SOCK_CLOEXEC and SOCK_NONBLOCK to the socket module, where
  supported by the system.  Patch by Nikita Vetoshkin.
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- Issue #10063: file:// scheme will stop accessing remote hosts via ftp
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  protocol. file:// urls had fallback to access remote hosts via ftp. This was
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  not correct, change is made to raise a URLError when a remote host is tried to
  access via file:// scheme.
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- 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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- 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.
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- Issue #9003: http.client.HTTPSConnection, urllib.request.HTTPSHandler and
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  urllib.request.urlopen now take optional arguments to allow for server
  certificate checking, as recommended in public uses of HTTPS.
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- 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.
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- Issue #10075: Add a session_stats() method to SSLContext objects.

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- Issue #9948: Fixed problem of losing filename case information.

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Extension Modules
-----------------
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- Issue #6317: Now winsound.PlaySound only accepts unicode.

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- Issue #6317: Now winsound.PlaySound can accept non ascii filename.

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- Issue #9377: Use Unicode API for gethostname on Windows.

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- Issue #10143: Update "os.pathconf" values.

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- Issue #6518: Support context manager protcol for ossaudiodev types.

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- Issue #678250: Make mmap flush a noop on ACCESS_READ and ACCESS_COPY.

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- Issue #9054: Fix a crash occurring when using the pyexpat module with expat
  version 2.0.1.
738

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- 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.
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- The Unicode database was updated to 6.0.0.

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C-API
-----

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- 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.
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- Issue #9778: Hash values are now always the size of pointers. A new Py_hash_t
  type has been introduced.

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Tools/Demos
-----------

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- 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.
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- Issue #7287: Demo/imputil/knee.py was removed.

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Tests
-----

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- Issue #3699: Fix test_bigaddrspace and extend it to test bytestrings as well
  as unicode strings.  Initial patch by Sandro Tosi.
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- Issue #10294: Remove dead code form test_unicode_file.

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- Issue #10123: Don't use non-ascii filenames in test_doctest tests. Add a new
  test specific to unicode (non-ascii name and filename).
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Build
-----

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- Issue #10268: Add a --enable-loadable-sqlite-extensions option to configure.

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- Issue #8852: Allow the socket module to build on OpenSolaris.

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- Drop -OPT:Olimit compiler option.

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- Issue #10094: Use versioned .so files on GNU/kfreeBSD and the GNU Hurd.

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- Accept Oracle Berkeley DB 5.0 and 5.1 as backend for the dbm extension.

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- 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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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
-----------------

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- Issue #10068: Global objects which have reference cycles with their module's
  dict are now cleared again. This causes issue #7140 to appear again.

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- Issue #9738: Document PyErr_SetString() and PyErr_SetFromErrnoWithFilename()
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  encodings.
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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.
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- 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.

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- Issue #8670: PyUnicode_AsWideChar() and PyUnicode_AsWideCharString() replace
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  UTF-16 surrogate pairs by single non-BMP characters for 16 bits Py_UNICODE and
  32 bits wchar_t (eg. Linux in narrow build).
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- Issue #10003: Allow handling of SIGBREAK on Windows. Fixes a regression
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  introduced by issue #9324.
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- Issue #9979: Create function PyUnicode_AsWideCharString().

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- Issue #7397: Mention that importlib.import_module() is probably what someone
  really wants to be using in __import__'s docstring.

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- Issue #8521: Allow CreateKeyEx, OpenKeyEx, and DeleteKeyEx functions of winreg
  to use named arguments.
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- Issue #9930: Remove bogus subtype check that was causing (e.g.)
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  float.__rdiv__(2.0, 3) to return NotImplemented instead of the expected 1.5.
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- Issue #9808: Implement os.getlogin for Windows. Patch by Jon Anglin.

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- 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.
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- 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.

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- Issue #9213: The range type_items now provides index() and count() methods, to
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  conform to the Sequence ABC.  Patch by Daniel Urban and Daniel Stutzbach.
846

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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.
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- 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.

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- 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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- Issue #9738: PyUnicode_FromFormat() and PyErr_Format() raise an error on a
  non-ASCII byte in the format string.
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- 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.
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- 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.

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- Issue #9797: pystate.c wrongly assumed that zero couldn't be a valid
  thread-local storage key.

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Library
-------

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- Issue #2236: distutils' mkpath ignored the mode parameter.

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- 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.

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- Issue #9437: Fix building C extensions with non-default LDFLAGS.

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- Issue #4661: email can now parse bytes input and generate either converted
  7bit output or bytes output.  Email version bumped to 5.1.0.

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- Issue #1589: Add ssl.match_hostname(), to help implement server identity
  verification for higher-level protocols.

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- Issue #9759: GzipFile now raises ValueError when an operation is attempted
  after the file is closed.  Patch by Jeffrey Finkelstein.

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- Issue #9042: Fix interaction of custom translation classes and caching in
  gettext.

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- Issue #6706: asyncore.dispatcher now provides a handle_accepted() method
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  returning a (sock, addr) pair which is called when a connection has been
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  established with a new remote endpoint.  This is supposed to be used as a
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  replacement for old handle_accept() and avoids the user to call accept()
  directly.

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- Issue #9065: tarfile no longer uses "root" as the default for the uname and
  gname field.

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- Issue #8980: Fixed a failure in distutils.command check that was shadowed by
  an environment that does not have docutils.  Patch by Arfrever.
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- Issue #1050268: parseaddr now correctly quotes double quote and backslash
  characters that appear inside quoted strings in email addresses.

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- Issue #10004: quoprimime no longer generates a traceback when confronted with
  invalid characters after '=' in a Q-encoded word.
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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.
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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.
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- Issue #9962: GzipFile now has the peek() method.

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- 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).
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- Issue #3612: Added new types to ctypes.wintypes. (CHAR and pointers)

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- 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.

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- Issue #9908: Fix os.stat() on bytes paths under Windows 7.

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- 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.

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- 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.
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- Issue #9854: The default read() implementation in io.RawIOBase now handles
  non-blocking readinto() returning None correctly.
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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).
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- Issue #9853: Fix the signature of SSLSocket.recvfrom() and SSLSocket.sendto()
  to match the corresponding socket methods.
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- Issue 9840: Added a decorator to reprlib for wrapping __repr__ methods to make
  them handle recursive calls within the same thread.
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- logging: Enhanced HTTPHandler with secure and credentials initializers.

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- 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.
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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.
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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.
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- The pprint module now supports printing OrderedDicts in their given order
  (formerly, it would sort the keys).
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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.
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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.
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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.
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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.
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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.
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- collections.OrderedDict now supports a new method for repositioning keys to
  either end.
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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.
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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.

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- 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.

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- Issue #9834: Don't segfault in PySequence_GetSlice, PySequence_SetSlice, or
  PySequence_DelSlice when the object doesn't have any mapping operations
  defined.

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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
-----

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- 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.

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- 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.
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- Issue #9894: Do not hardcode ENOENT in test_subprocess.

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- 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
-----

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- 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.
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- Issue #10055: Make json C89-compliant in UCS4 mode.

1153 1154
- Issue #9552: Avoid unnecessary rebuild of OpenSSL. (Windows)

1155 1156
- 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.
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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.
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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.
1195

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- Issue #9737: Fix a crash when trying to delete a slice or an item from a
  memoryview object.
1198

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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.

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- 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.
1215

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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().

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- 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.
1239

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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.

1244
- 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.
1247

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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.
1251

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- Issue #9425: Create PyErr_WarnFormat() function, similar to PyErr_WarnEx() but
  use PyUnicode_FromFormatV() to format the warning message.
1254

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- Issue #8530: Prevent stringlib fastsearch from reading beyond the front of an
  array.
1257

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- Issue #5319: Print an error if flushing stdout fails at interpreter shutdown.
1259

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- Issue #9337: The str() of a float or complex number is now identical to its
  repr().
1262

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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.

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Extension Modules
-----------------
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- Issue #6608: time.asctime is now checking struct tm fields its input
  before passing it to the system asctime.  Patch by MunSic Jeong.

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- 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.
1280

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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.
1284

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- Issue #1027206: Support IDNA in gethostbyname, gethostbyname_ex, getaddrinfo
  and gethostbyaddr.  getnameinfo is now restricted to numeric addresses as
  input.
1288

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- Issue #9214: Set operations on a KeysView or ItemsView in collections now
  correctly return a set.  Patch by Eli Bendersky.
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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.
1297

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- Issue #665761: ``functools.reduce()`` will no longer mask exceptions other
  than ``TypeError`` raised by the iterator argument.
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- Issue #9570: Use PEP 383 decoding in os.mknod and os.mkfifo.

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1303 1304
- Issue #6915: Under Windows, os.listdir() didn't release the Global Interpreter
  Lock around all system calls.  Original patch by Ryan Kelly.
1305

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1306 1307
- 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.
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- Issue #477863: Emit a ResourceWarning at shutdown if gc.garbage is not empty.
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- 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.
1315

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- Issue #9507: Named tuple repr will now automatically display the right name in
  a tuple subclass.
1318

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1319 1320
- Issue #9324: Add parameter validation to signal.signal on Windows in order to
  prevent crashes.
1321

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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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1327 1328
- 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.

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- 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.
1337

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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.
1344

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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.
1347

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1348
- Issue #9753: Fixed socket.dup, which did not always work correctly on Windows.
1349

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- Issue #9421: Made the get<type> methods consistently accept the vars and
  default arguments on all parser classes.
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- Issue #7005: Fixed output of None values for RawConfigParser.write and
  ConfigParser.write.

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- 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.
1360

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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.
1363

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- Issue #9706: ssl module provides a better error handling in various
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  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.
1369

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- Issue #1512791: In setframerate() in the wave module, non-integral frame rates
  are rounded to the nearest integer.
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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.
1381

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- Issue #9129: smtpd.py is vulnerable to DoS attacks deriving from missing error
  handling when accepting a new connection.
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- 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.
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- Issue #658749: asyncore's connect() method now correctly interprets winsock
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  errors.
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- Issue #9501: Fixed logging regressions in cleanup code.

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1394
- Fix functools.total_ordering() to skip methods inherited from object.
1395

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1396 1397
- Issue #9572: Importlib should not raise an exception if a directory it thought
  it needed to create was done concurrently by another process.
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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.
1406

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1407 1408
- Issue #3488: Provide convenient shorthand functions ``gzip.compress`` and
  ``gzip.decompress``.  Original patch by Anand B. Pillai.
1409

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- 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.

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- Issue #8866: parameters passed to socket.getaddrinfo can now be specified as
  single keyword arguments.

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- Address XXX comment in dis.py by having inspect.py prefer to reuse the dis.py
  compiler flag values over defining its own.
1420

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- 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.
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- Issue #9567: functools.update_wrapper now adds a __wrapped__ attribute
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  pointing to the original callable.
1426

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- Issue #3445: functools.update_wrapper now tolerates missing attributes on
  wrapped callables.
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- Issue #5867: Add abc.abstractclassmethod and abc.abstractstaticmethod.

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- Issue #9605: posix.getlogin() decodes the username with file filesystem
  encoding and surrogateescape error handler. Patch written by David Watson.

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- Issue #9604: posix.initgroups() encodes the username using the fileystem
  encoding and surrogateescape error handler. Patch written by David Watson.

1438
- Issue #9603: posix.ttyname() and posix.ctermid() decode the terminal name
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  using the filesystem encoding and surrogateescape error handler. Patch written
  by David Watson.
1441

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- Issue #7647: The posix module now has the ST_RDONLY and ST_NOSUID constants,
  for use with the statvfs() function.  Patch by Adam Jackson.
1444

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- 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.
1448

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- 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).
1452

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- 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.
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- Issue #3757: thread-local objects now support cyclic garbage collection.
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  Thread-local objects involved in reference cycles will be deallocated timely
  by the cyclic GC, even if the underlying thread is still running.
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- Issue #9452: Add read_file, read_string, and read_dict to the configparser
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  API; new source attribute to exceptions.

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- Issue #6231: Fix xml.etree.ElementInclude to include the tail of the current
  node.
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- Issue #8047: Fix the xml.etree serializer to return bytes by default.  Use
  ``encoding="unicode"`` to generate a Unicode string.

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- 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.
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- Issue #6683: For SMTP logins we now try all authentication methods advertised
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  by the server.  Many servers are buggy and advertise authentication methods
  they do not support in reality.
1478

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- 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.
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- Issue #2944: asyncore doesn't handle connection refused correctly.

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- Issue #4184: Private attributes on smtpd.SMTPChannel made public and deprecate
  the private attributes. Add tests for smtpd module.
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- Issue #3196: email header decoding is now forgiving if an RFC2047 encoded word
  encoded in base64 is lacking padding.
1490

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- 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.
1494

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- Issue #7372: Fix pstats regression when stripping paths from profile data
  generated with the profile module.
1497

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- Issue #9428: Fix running scripts with the profile/cProfile modules from the
  command line.
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- Issue #7781: Fix restricting stats by entry counts in the pstats interactive
  browser.
1503

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- Issue #9209: Do not crash in the pstats interactive browser on invalid regular
  expressions.
1506

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1507 1508
- Update collections.OrderedDict to match the implementation in Py2.7 (based on
  lists instead of weakly referenced Link objects).
1509

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- Issue #8397: Raise an error when attempting to mix iteration and regular reads
  on a BZ2File object, rather than returning incorrect results.
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- Issue #9448: Fix a leak of OS resources (mutexes or semaphores) when
  re-initializing a buffered IO object by calling its ``__init__`` method.

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- Issue #1713: Fix os.path.ismount(), which returned true for symbolic links
  across devices.

1519 1520
- Issue #8826: Properly load old-style "expires" attribute in http.cookies.

1521 1522
- Issue #1690103: Fix initial namespace for code run with trace.main().

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- Issue #7395: Fix tracebacks in pstats interactive browser.

1525 1526
- Issue #8230: Fix Lib/test/sortperf.py.

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- Issue #8620: when a Cmd is fed input that reaches EOF without a final newline,
  it no longer truncates the last character of the last command line.
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- Issue #5146: Handle UID THREAD command correctly in imaplib.

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- Issue #5147: Fix the header generated for cookie files written by
  http.cookiejar.MozillaCookieJar.

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- Issue #8198: In pydoc, output all help text to the correct stream when
  sys.stdout is reassigned.
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- Issue #7909: Do not touch paths with the special prefixes ``\\.\`` or ``\\?\``
  in ntpath.normpath().
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- Issue #1286: Allow using fileinput.FileInput as a context manager.

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- Add lru_cache() decorator to the functools module.
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Tools/Demos
-----------

1548 1549
- Fix ``Tools/scripts/checkpyc.py`` after PEP 3147.

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- Issue #8867: Fix ``Tools/scripts/serve.py`` to work with files containing
  non-ASCII content.

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Tests
-----

1556 1557
- Issue #9601: Provide a test case for ftplib.parse257.

1558 1559
- Issue #8857: Provide a test case for socket.getaddrinfo.

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- Issue #7564: Skip test_ioctl if another process is attached to /dev/tty.

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- Issue #8433: Fix test_curses failure with newer versions of ncurses.

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- Issue #9496: Provide a test suite for the rlcompleter module.  Patch by
  Michele Orrù.

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- Issue #8687: provide a test suite for sched.py module.

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Build
-----

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- Issue #1303434: Generate ZIP file containing all PDBs.

1574 1575
- Issue #9193: PEP 3149 is accepted.

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- 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.
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- Issue #9700: define HAVE_BROKEN_POSIX_SEMAPHORES under AIX 6.x.  Patch by
  Sébastien Sablé.

1582 1583
- Don't run pgen twice when using make -j.

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What's New in Python 3.2 Alpha 1?
=================================

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*Release date: 01-Aug-2010*
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Core and Builtins
-----------------

1593 1594
- Issue #8991: convertbuffer() rejects discontigious buffers.

1595 1596 1597
- Issue #7616: Fix copying of overlapping memoryview slices with the Intel
  compiler.

1598 1599
- Issue #8413: structsequence now subclasses tuple.

1600
- Issue #8271: during the decoding of an invalid UTF-8 byte sequence, only the
1601 1602 1603 1604 1605 1606
  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'.
1607

1608 1609
- 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)".
1610

1611 1612
- Be more specific in error messages about positional arguments.

1613 1614 1615
- Issue #8949: "z" format of PyArg_Parse*() functions doesn't accept bytes
  objects, as described in the documentation.

1616
- Issue #6543: Write the traceback in the terminal encoding instead of utf-8.
1617
  Fix the encoding of the modules filename.  Patch written by Amaury Forgeot
1618
  d'Arc.
1619

1620 1621 1622
- 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.
1623

1624
- Issue #850997: mbcs encoding (Windows only) handles errors argument: strict
1625
  mode raises unicode errors.  The encoder only supports "strict" and "replace"
1626
  error handlers, the decoder only supports "strict" and "ignore" error
1627
  handlers.  Patch written by Mark Hammond.
1628

1629 1630 1631
- Issue #8850: Remove "w" and "w#" formats from PyArg_Parse*() functions, use
  "w*" format instead. Add tests for "w*" format.

1632
- Issue #8592: PyArg_Parse*() functions raise a TypeError for "y", "u" and "Z"
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  formats if the string contains a null byte/character.  Write unit tests for
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  string formats.

1636
- Issue #7490: To facilitate sharing of doctests between 2.x and 3.x test
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  suites, the IGNORE_EXCEPTION_DETAIL directive now also ignores the module
  location of the raised exception.

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- Issue #8969: On Windows, use mbcs codec in strict mode to encode and decode
  filenames and enable os.fsencode().

1643 1644
- Issue #9058: Remove assertions about INT_MAX in UnicodeDecodeError.

1645 1646 1647
- 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).
1648

1649 1650 1651 1652
- 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.)
1653

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- 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().

1658 1659
- Issue #8838: Remove codecs.charbuffer_encode() function.  The buffer protocol
  doesn't support "char buffer" anymore in Python 3.
1660 1661

- Issue #8339: Remove "t#" format of PyArg_Parse*() functions, use "s#" or "s*"
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  instead.  codecs.charbuffer_encode() now accepts modifiable buffer objects
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  like bytearray.

1665
- Issue #8837: Remove "O?" format of PyArg_Parse*() functions.  The format is no
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  used anymore and it was never documented.

1668
- In str.format(), raise a ValueError when indexes to arguments are too large.
1669

1670 1671
- Issue #2844: Make int('42', n) consistently raise ValueError for invalid
  integers n (including n = -909).
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- 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.
1677

1678 1679
- Issue #8748: Fix two issues with comparisons between complex and integer
  objects.  (1) The comparison could incorrectly return True in some cases
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  (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.
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1685 1686 1687
- Issue #8766: Initialize _warnings module before importing the first module.
  Fix a crash if an empty directory called "encodings" exists in sys.path.

1688
- Issue #8589: Decode PYTHONWARNINGS environment variable with the file system
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  encoding and surrogateescape error handler instead of the locale encoding to
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  be consistent with os.environ.  Add PySys_AddWarnOptionUnicode() function.
1691

1692 1693
- PyObject_Dump() encodes unicode objects to utf8 with backslashreplace (instead
  of strict) error handler to escape surrogates.
1694

1695 1696
- Issue #8715: Create PyUnicode_EncodeFSDefault() function: Encode a Unicode
  object to Py_FileSystemDefaultEncoding with the "surrogateescape" error
1697
  handler, and return bytes.  If Py_FileSystemDefaultEncoding is not set, fall
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  back to UTF-8.
1699

1700
- Enable shortcuts for common encodings in PyUnicode_AsEncodedString() for any
1701
  error handler, not only the default error handler (strict).
1702

1703
- Issue #8610: Load file system codec at startup, and display a fatal error on
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  failure.  Set the file system encoding to utf-8 (instead of None) if getting
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  the locale encoding failed, or if nl_langinfo(CODESET) function is missing.

1707
- PyFile_FromFd() uses PyUnicode_DecodeFSDefault() instead of
1708 1709
  PyUnicode_FromString() to support surrogates in the filename and use the right
  encoding.
1710

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- Issue #7507: Quote "!" in pipes.quote(); it is special to some shells.

1713
- PyUnicode_DecodeFSDefaultAndSize() uses surrogateescape error handler.
1714

1715 1716 1717
- Issue #8419: Prevent the dict constructor from accepting non-string keyword
  arguments.

1718
- Issue #8124: PySys_WriteStdout() and PySys_WriteStderr() don't execute
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  indirectly Python signal handlers anymore because mywrite() ignores exceptions
  (KeyboardInterrupt).
1721

1722
- Issue #8092: Fix PyUnicode_EncodeUTF8() to support error handler producing
1723
  unicode string (eg. backslashreplace).
1724

1725 1726
- Issue #8485: PyUnicode_FSConverter() doesn't accept byteearray objects
  anymore, you have to convert your bytearray filenames to bytes.
1727

1728
- Issue #7332: Remove the 16KB stack-based buffer in
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  PyMarshal_ReadLastObjectFromFile, which doesn't bring any noticeable benefit
  compared to the dynamic memory allocation fallback.  Patch by Charles-François
  Natali.
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- Issue #8417: Raise an OverflowError when an integer larger than sys.maxsize is
  passed to bytes or bytearray.

1736 1737
- Issue #7301: Add environment variable $PYTHONWARNINGS.

1738 1739 1740
- Issue #8329: Don't return the same lists from select.select when no fds are
  changed.

1741 1742 1743
- 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.
1744

1745 1746
- Ensure that tokenization of identifiers is not affected by locale.

1747 1748
- Issue #1222585: Added LDCXXSHARED for C++ support. Patch by Arfrever.

1749 1750
- Raise a TypeError when trying to delete a T_STRING_INPLACE struct member.

1751 1752
- Issue #8211: Save/restore CFLAGS around AC_PROG_CC in configure.in, in case it
  is set.
1753

1754
- Issue #8226: sys.setfilesystemencoding() raises a LookupError if the encoding
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  is unknown.
1756

1757
- Issue #1583863: A str subclass can now override the __str__ method.
1758

1759
- Issue #8014: Setting a T_UINT or T_PYSSIZET attribute of an object with
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  PyMemberDefs could produce an internal error; raise TypeError instead.
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- 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.

1767 1768
- 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
1769
  printed and Python exits. Initialize the GIL before importing the site module.
1770

1771 1772
- Issue #7173: Generator finalization could invalidate sys.exc_info().

1773 1774
- Issue #7544: Preallocate thread memory before creating the thread to avoid a
  fatal error in low memory condition.
1775

1776 1777
- Issue #7820: The parser tokenizer restores all bytes in the right if the BOM
  check fails.
1778

1779 1780
- Handle errors from looking up __prepare__ correctly.

1781 1782
- Issue #5939: Add additional runtime checking to ensure a valid capsule in
  Modules/_ctypes/callproc.c.
1783

1784
- Issue #7309: Fix unchecked attribute access when converting
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  UnicodeEncodeError, UnicodeDecodeError, and UnicodeTranslateError to strings.
1786

1787 1788
- Issue #6902: Fix problem with built-in types format incorrectly with 0
  padding.
1789

1790 1791
- Issue #7988: Fix default alignment to be right aligned for complex.__format__.
  Now it matches other numeric types.
1792

1793
- Issue #5988: Remove deprecated functions PyOS_ascii_formatd,
1794 1795
  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.
1796

1797 1798
- Issue #7385: Fix a crash in `MemoryView_FromObject` when `PyObject_GetBuffer`
  fails.  Patch by Florent Xicluna.
1799

1800 1801
- Issue #7788: Fix an interpreter crash produced by deleting a list slice with
  very large step value.
1802

1803 1804 1805 1806
- 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.
1807

1808 1809 1810
- 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.
1811

1812
- Issue #6690: Optimize the bytecode for expressions such as `x in {1, 2, 3}`,
1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828
  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.
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- The __complex__ method is now looked up on the class of instances to make it
  consistent with other special methods.

1833 1834 1835
- Issue #7462: Implement the stringlib fast search algorithm for the `rfind`,
  `rindex`, `rsplit` and `rpartition` methods.  Patch by Florent Xicluna.

1836 1837 1838
- Issue #7604: Deleting an unset slotted attribute did not raise an
  AttributeError.

1839 1840
- Issue #7534: Fix handling of IEEE specials (infinities, nans, negative zero)
  in ** operator.  The behaviour now conforms to that described in C99 Annex F.
1841

1842 1843 1844 1845
- 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.
1846

1847 1848 1849
- Issue #6834: replace the implementation for the 'python' and 'pythonw'
  executables on OSX.

1850 1851 1852
  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).
1853

1854 1855
- Issue #7466: Segmentation fault when the garbage collector is called in the
  middle of populating a tuple.  Patch by Florent Xicluna.
1856

1857 1858 1859
- Issue #7419: setlocale() could crash the interpreter on Windows when called
  with invalid values.

1860 1861 1862
- Issue #6077: On Windows, files opened with tempfile.TemporaryFile in "wt+"
  mode would appear truncated on the first '0x1a' byte (aka. Ctrl+Z).

1863 1864
- Issue #7085: Fix crash when importing some extensions in a thread on MacOSX
  10.6.
1865

1866 1867
- Issue #1757126: Fix the cyrillic-asian alias for the ptcp154 encoding.

1868 1869 1870
- Issue #6970: Remove redundant calls when comparing objects that don't
  implement the relevant rich comparison methods.

1871 1872 1873 1874 1875
- 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.
1876

1877 1878
- Issue #7244: itertools.izip_longest() no longer ignores exceptions raised
  during the formation of an output tuple.
1879

1880 1881 1882
- Issue #3297: On wide unicode builds, do not split unicode characters into
  surrogates.

1883 1884
- Remove length limitation when constructing a complex number from a string.

1885 1886
- Issue #1087418: Boost performance of bitwise operations for longs.

1887 1888 1889 1890 1891 1892 1893
- 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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- Support for OSF* has been disabled. If nobody stands up, support will be
1895
  removed in 3.3. See <http://bugs.python.org/issue8606>.
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1897 1898
- Peephole constant folding had missed UNARY_POSITIVE.

1899 1900 1901 1902
- 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.

1903
- Issue #7147: Remove support for compiling Python without complex number
1904 1905
  support.

1906 1907
- Issue #7120: logging: Removed import of multiprocessing which is causing crash
  in GAE.
1908

1909 1910 1911
- 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.
1912

1913 1914
- Issue #7065: Fix a crash in bytes.maketrans and bytearray.maketrans when using
  byte values greater than 127.  Patch by Derk Drukker.
1915

1916 1917 1918 1919 1920
- 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.

1921 1922
- Issue #7019: Raise ValueError when unmarshalling bad long data, instead of
  producing internally inconsistent Python longs.
1923

1924 1925
- Issue #6990: Fix threading.local subclasses leaving old state around after a
  reference cycle GC which could be recycled by new locals.
1926

1927 1928
- Issue #5460: Fix an ambiguity in the grammar.

1929 1930
- Issue #1766304: Improve performance of membership tests on range objects.

1931 1932
- Issue #6713: Improve performance of integer -> string conversions.

1933 1934
- Issue #6846: Fix bug where bytearray.pop() returns negative integers.

1935 1936
- Issue #6750: A text file opened with io.open() could duplicate its output when
  writing from multiple threads at the same time.
1937

1938 1939
- Issue #6707: dir() on an uninitialized module caused a crash.

1940 1941
- Issue #6540: Fixed crash for bytearray.translate() with invalid parameters.

1942 1943 1944
- Issue #6573: set.union() stopped processing inputs if an instance of self
  occurred in the argument chain.

1945 1946
- Issue #6070: On posix platforms import no longer copies the execute bit from
  the .py file to the .pyc file if it is set.
1947

1948 1949
- Issue #1616979: Added the cp720 (Arabic DOS) encoding.

1950 1951
- 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.
1952

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1953 1954
- The deprecated PyCObject has been removed.

1955 1956 1957
- 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.
1958

1959 1960
- Issue #6373: Fixed a SystemError when encoding with the latin-1 codec and the
  'surrogateescape' error handler, a string which contains unpaired surrogates.
1961

1962 1963
- Issue #4856: Remove checks for win NT.

1964 1965
- Issue #6687: PyBytes_FromObject() no longer accepts an integer as its argument
  to construct a null-initialized bytes object.
1966

1967 1968
- Issue #1023290: Add from_bytes() and to_bytes() methods to integers.  These
  methods allow the conversion of integers to bytes, and vice-versa.
1969

1970 1971 1972
- Issue #7382: Fix bug in bytes.__getnewargs__ that prevented bytes instances
  from being copied with copy.copy(), and bytes subclasses from being pickled
  properly.
1973

1974 1975
- Code objects now support weak references.

1976
- Issue #7072: isspace(0xa0) is true on Mac OS X.
1977

1978
- Issue #8084: PEP 370 now conforms to system conventions for framework builds
1979 1980
  on MacOS X. That is, "python setup.py install --user" will install into
  "~/Library/Python/2.7" instead of "~/.local".
1981

1982 1983 1984
C-API
-----

1985 1986 1987 1988
- 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.

1989 1990 1991 1992
- 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.

1993 1994 1995
- 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
1996 1997
  <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5983>`_.

1998 1999 2000
- Add PyArg_ValidateKeywordArguments, which checks if all keyword arguments are
  strings in an efficient manner.

2001
- Issue #8276: PyEval_CallObject() is now only available in macro form.  The
2002 2003
  function declaration, which was kept for backwards compatibility reasons, is
  now removed (the macro was introduced in 1997!).
2004

2005 2006
- Issue #7767: New function PyLong_AsLongLongAndOverflow added, analogous to
  PyLong_AsLongAndOverflow.
2007

2008 2009 2010
- Make PyUnicode_CompareWithASCIIString return not equal if the Python string
  has '\0' at the end.

2011
- Issue #5080: The argument parsing functions PyArg_ParseTuple,
2012 2013 2014
  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,
2015 2016
  to match the behaviour of the other integer format codes.

2017
- Issue #7033: Function ``PyErr_NewExceptionWithDoc()`` added.
2018

2019 2020
- Issue #7414: 'C' code wasn't being skipped properly (for keyword arguments) in
  PyArg_ParseTupleAndKeywords.
2021

2022 2023
- Issue #7228: Add '%lld' and '%llu' support to PyString_FromFormat(V) and
  PyErr_Format, on machines with HAVE_LONG_LONG defined.
2024

2025 2026 2027
- 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.
2028 2029

- Issue #6405: Remove duplicate type declarations in descrobject.h.
2030

2031 2032
- The code flags for old __future__ features are now available again.

2033 2034 2035 2036 2037 2038 2039 2040 2041
- 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.

2042 2043 2044 2045
- 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.
2046

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2047 2048
Library
-------
2049

2050 2051
- In pdb, when Ctrl-C is entered while defining commands for a breakpoint, the
  old commands are restored.
2052

2053 2054 2055
- 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).
2056

2057 2058
- The pdb command "source" has been added.  It displays the source code for a
  given object, if possible.
2059

2060 2061
- The pdb command "longlist" has been added.  It displays the whole source code
  for the current function.
2062

2063 2064
- Issue #1503502: Make pdb.Pdb easier to subclass by putting message and error
  output into methods.
2065

2066 2067
- Issue #809887: Make the output of pdb's breakpoint deletions more consistent;
  emit a message when a breakpoint is enabled or disabled.
2068

2069 2070
- Issue #5294: Fix the behavior of pdb's "continue" command when called in the
  top-level debugged frame.
2071

2072 2073
- Issue #5727: Restore the ability to use readline when calling into pdb in
  doctests.
2074

2075 2076
- 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.
2077

2078 2079
- Issue #8048: Prevent doctests from failing when sys.displayhook has been
  reassigned.
2080

2081 2082
- Issue #8015: In pdb, do not crash when an empty line is entered as a
  breakpoint command.
2083

2084 2085
- In pdb, allow giving a line number to the "until" command.

2086 2087 2088
- 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.
2089

2090 2091
- Issue #4179: In pdb, allow "list ." as a command to return to the currently
  debugged line.
2092

2093
- Issue #4108: In urllib.robotparser, if there are multiple ``User-agent: *``
2094 2095
  entries, consider the first one.

2096 2097 2098
- Issue #6630: Allow customizing regex flags when subclassing the
  string.Template class.

2099 2100
- Issue #9411: Allow specifying an encoding for config files in the configparser
  module.
2101

2102 2103
- Issue #1682942: Improvements to configparser: support alternate delimiters,
  alternate comment prefixes and empty lines in values.
2104

2105 2106
- Issue #9354: Provide getsockopt() in asyncore's file_wrapper.

2107 2108
- Issue #8966: ctypes: Remove implicit bytes-unicode conversion.

2109 2110
- Issue #9378: python -m pickle <pickle file> will now load and display the
  first object in the pickle file.
2111

2112
- Issue #4770: Restrict binascii module to accept only bytes (as specified).
2113 2114
  And fix the email package to encode to ASCII instead of ``raw-unicode-escape``
  before ASCII-to-binary decoding.
2115

2116
- Issue #9384: ``python -m tkinter`` will now display a simple demo applet.
2117

2118 2119
- 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
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2120 2121
  simply clearing the entire cache on overflow to forgetting the least recently
  used cached compiled regular expressions.  This is a performance win for
2122 2123
  applications that use a lot of regular expressions and limits the impact of
  the performance hit anytime the cache is exceeded.
2124

2125 2126
- Issue #7113: Speed up loading in configparser. Patch by Łukasz Langa.

2127
- Issue #9032: XML-RPC client retries the request on EPIPE error.  The EPIPE
2128 2129 2130
  error occurs when the server closes the socket and the client sends a big
  XML-RPC request.

2131 2132 2133
- 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).
2134

2135 2136 2137 2138 2139 2140
- 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.
2141

2142
- Issue #7895: platform.mac_ver() no longer crashes after calling os.fork().
2143

2144 2145
- Issue #9323: Fixed a bug in trace.py that resulted in loosing the name of the
  script being traced.  Patch by Eli Bendersky.
2146

2147 2148
- Issue #9282: Fixed --listfuncs option of trace.py.  Thanks Eli Bendersky for
  the patch.
2149

2150 2151 2152
- Issue #3704: http.cookiejar was not properly handling URLs with a / in the
  parameters.

2153 2154
- Issue #9268: ``pickletools.dis()`` now has an optional *annotate* argument
  which controls printing of opcode descriptions in ``dis()`` output.
2155

2156 2157
- Issue #1555570: email no longer inserts extra blank lines when a \r\n combo
  crosses an 8192 byte boundary.
2158

2159 2160
- Issue #9243: Fix sndhdr module and add unit tests, contributed by James Lee.

Benjamin Peterson's avatar
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2161 2162
- ``ast.literal_eval()`` now allows byte literals.

2163 2164
- Issue #9137: Fix issue in MutableMapping.update, which incorrectly treated
  keyword arguments called 'self' or 'other' specially.
2165

2166 2167 2168
- ``ast.literal_eval()`` now allows set literals.

- Issue #9164: Ensure that sysconfig handles duplicate -arch flags in CFLAGS.
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Ronald Oussoren committed
2169

2170 2171
- Issue #7646: The fnmatch pattern cache no longer grows without bound.

2172 2173 2174
- 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__.
2175

2176 2177 2178
- 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')``).
2179

2180 2181
- Issue #9186: Fix math.log1p(-1.0) to raise ValueError, not OverflowError.

2182 2183
- Issue #9130: Fix validation of relative imports in parser module.

2184 2185
- Issue #9128: Fix validation of class decorators in parser module.

2186 2187 2188
- 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.
2189

2190 2191 2192
- Issue #5468: urlencode to handle bytes type and other encodings in its query
  parameter. Patch by Dan Mahn.

2193 2194
- 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.
2195

2196 2197
- Issue #6507: Accept source strings in dis.dis().  Original patch by Daniel
  Urban.
2198

2199 2200 2201
- Issue #7829: Clearly document that the dis module is exposing an
  implementation detail that is not stable between Python VMs or releases.

2202
- Issue #6589: cleanup asyncore.socket_map in case smtpd.SMTPServer constructor
2203 2204
  raises an exception.

2205
- Issue #9110: Addition of ContextDecorator to contextlib, for creating APIs
2206 2207
  that act as both context managers and decorators. contextmanager changes to
  use ContextDecorator.
2208

2209 2210 2211
- Implement importlib.abc.SourceLoader and deprecate PyLoader and PyPycLoader
  for removal in Python 3.4.

2212 2213
- Issue #9064: pdb's "up" and "down" commands now accept an optional argument
  giving the number of frames to go.
2214

2215 2216
- Issue #9018: os.path.normcase() now raises a TypeError if the argument is not
  ``str`` or ``bytes``.
2217

2218 2219
- Issue #9075: In the ssl module, remove the setting of a ``debug`` flag on an
  OpenSSL structure.
2220

2221 2222
- Issue #8682: The ssl module now temporary increments the reference count of a
  socket object got through ``PyWeakref_GetObject``, so as to avoid possible
2223 2224
  deallocation while the object is still being used.

2225
- Issue #1368368: FancyURLOpener class changed to throw an Exception on wrong
2226
  password instead of presenting an interactive prompt.  Older behavior can be
2227 2228
  obtained by passing retry=True to http_error_xxx methods of FancyURLOpener.

2229
- Issue #8720: Fix regression caused by fix for #4050 by making getsourcefile
2230 2231
  smart enough to find source files in the linecache.

2232 2233
- Issue #5610: feedparser no longer eats extra characters at the end of a body
  part if the body part ends with a ``\r\n``.
2234

2235 2236
- Issue #8986: math.erfc was incorrectly raising OverflowError for values
  between -27.3 and -30.0 on some platforms.
2237

2238 2239
- Issue #8784: Set tarfile default encoding to 'utf-8' on Windows.

2240 2241 2242
- 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).

2243 2244 2245 2246 2247
- 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.
2248

2249 2250
- Issue #8897: Fix sunau module, use bytes to write the header. Patch written by
  Thomas Jollans.
2251

Raymond Hettinger's avatar
Nits  
Raymond Hettinger committed
2252
- Issue #8899: time.struct_time now has class and attribute docstrings.
2253

2254 2255
- Issue #6470: Drop UNC prefix in FixTk.

2256 2257
- Issue #4768: base64 encoded email body parts were incorrectly stored as binary
  strings.  They are now correctly converted to strings.
2258

2259 2260 2261
- Issue #8833: tarfile created hard link entries with a size field != 0 by
  mistake.

2262 2263
- Charset.body_encode now correctly handles base64 encoding by encoding with the
  output_charset before calling base64mime.encode.  Passes the tests from 2.x
2264
  issue #1368247.
2265

2266 2267 2268
- Issue #8845: sqlite3 Connection objects now have a read-only in_transaction
  attribute that is True iff there are uncommitted changes.

2269 2270 2271
- 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.
2272

2273 2274 2275
- Issue #7150: Raise OverflowError if the result of adding or subtracting
  timedelta from date or datetime falls outside of the MINYEAR:MAXYEAR range.

2276 2277
- Issue #8806: add SSL contexts support to ftplib.

2278 2279
- 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
2280
  API.
2281

2282 2283
- Issue #8770: Now sysconfig displays information when it's called as a script.
  Initial idea by Sridhar Ratnakumar.
2284

2285
- Issue #6662: Fix parsing of malformatted charref (&#bad;), patch written by
2286
  Fredrik Håård.
2287

2288
- Issue #8540: Decimal module: rename the Context._clamp attribute to
2289 2290
  Context.clamp and make it public.  This is useful in creating contexts that
  correspond to the decimal interchange formats specified in IEEE 754.
2291

2292 2293 2294
- 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.
2295

2296
- Issue #3798: sys.exit(message) writes the message to sys.stderr file, instead
2297
  of the C file stderr, to use stderr encoding and error handler.
2298

2299 2300 2301
- Issue #8782: Add a trailing newline in linecache.updatecache to the last line
  of files without one.

2302 2303 2304
- Issue #8729: Return NotImplemented from collections.Mapping.__eq__ when
  comparing to a non-mapping.

2305
- Issue #8774: tabnanny uses the encoding cookie (#coding:...) to use the
2306
  correct encoding.
2307

2308 2309 2310
- 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`.
2311

2312 2313
- Issue #8759: Fixed user paths in sysconfig for posix and os2 schemes.

2314 2315 2316 2317
- 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).

2318 2319 2320 2321 2322
- 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).

2323 2324 2325
- Issue #8633: tarfile is now able to read and write archives with "raw" binary
  pax headers as described in POSIX.1-2008.

2326 2327 2328
- Issue #1285086: Speed up urllib.parse functions: quote, quote_from_bytes,
  unquote, unquote_to_bytes.

2329 2330
- Issue #8688: Distutils now recalculates MANIFEST everytime.

2331
- Issue #8477: ssl.RAND_egd() and ssl._test_decode_cert() support str with
2332
  surrogates and bytes for the filename.
2333

2334 2335
- Issue #8550: Add first class ``SSLContext`` objects to the ssl module.

2336 2337
- Issue #8681: Make the zlib module's error messages more informative when the
  zlib itself doesn't give any detailed explanation.
2338

2339 2340
- The audioop module now supports sound fragments of length greater than 2**31
  bytes on 64-bit machines, and is PY_SSIZE_T_CLEAN.
2341

2342 2343 2344
- Issue #4972: Add support for the context manager protocol to the ftplib.FTP
  class.

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2345 2346 2347
- Issue #8664: In py_compile, create __pycache__ when the compiled path is
  given.

2348 2349 2350
- 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.

2351 2352
- Issue #8571: Fix an internal error when compressing or decompressing a chunk
  larger than 1GB with the zlib module's compressor and decompressor objects.
2353

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2354 2355 2356 2357
- 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.
2358

2359 2360
- Issue #8573: asyncore _strerror() function might throw ValueError.

2361 2362 2363 2364
- 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.
2365

2366 2367 2368
- Issue #4265: shutil.copyfile() was leaking file descriptors when disk fills.
  Patch by Tres Seaver.

2369
- Issue #8390: tarfile uses surrogateescape as the default error handler
2370
  (instead of replace in read mode or strict in write mode).
2371

2372 2373
- Issue #7755: Use an unencumbered audio file for tests.

2374 2375
- 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.
2376

2377 2378 2379 2380 2381
- 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.
2382

2383
- Issue #7865: The close() method of :mod:`io` objects should not swallow
2384 2385
  exceptions raised by the implicit flush().  Also qensure that calling close()
  several times is supported.  Patch by Pascal Chambon.
2386

2387 2388 2389
- Issue #4687: Fix accuracy of garbage collection runtimes displayed with
  gc.DEBUG_STATS.

2390 2391
- Issue #8354: The siginterrupt setting is now preserved for all signals, not
  just SIGCHLD.
2392

2393
- Issue #7192: webbrowser.get("firefox") now works on Mac OS X, as does
2394 2395
  webbrowser.get("safari").

2396 2397
- Issue #8464: tarfile no longer creates files with execute permissions set when
  mode="w|" is used.
2398

2399 2400
- Issue #7834: Fix connect() of Bluetooth L2CAP sockets with recent versions of
  the Linux kernel.  Patch by Yaniv Aknin.
2401

2402 2403
- Issue #8295: Added shutil.unpack_archive.

2404 2405 2406
- Issue #6312: Fixed http HEAD request when the transfer encoding is chunked.
  It should correctly return an empty response now.

2407 2408
- Issue #8546: Reject None given as the buffering argument to _pyio.open.

2409 2410 2411
- Issue #8549: Fix compiling the _ssl extension under AIX.  Patch by
  Sridhar Ratnakumar.

2412 2413 2414
- Issue #6656: fix locale.format_string to handle escaped percents
  and mappings.

2415 2416 2417 2418
- 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.
2419

2420 2421 2422
- 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).
2423

2424 2425 2426
- Issue #5103: SSL handshake would ignore the socket timeout and block
  indefinitely if the other end didn't respond.

2427 2428
- The do_handshake() method of SSL objects now adjusts the blocking mode of the
  SSL structure if necessary (as other methods already do).
2429

2430 2431
- Issue #8391: os.execvpe() and os.getenv() supports unicode with surrogates and
  bytes strings for environment keys and values.
2432

2433 2434
- Issue #8467: Pure Python implementation of subprocess encodes the error
  message using surrogatepass error handler to support surrogates in the
2435
  message.
2436

2437
- Issue #8468: bz2.BZ2File() accepts str with surrogates and bytes filenames.
2438

2439 2440 2441
- 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.
2442

2443 2444
- Issue #8108: Fix the unwrap() method of SSL objects when the socket has a
  non-infinite timeout.  Also make that method friendlier with applications
2445 2446 2447
  wanting to continue using the socket in clear-text mode, by disabling
  OpenSSL's internal readahead.  Thanks to Darryl Miles for guidance.

2448 2449 2450
- Issue #8496: make mailcap.lookup() always return a list, rather than an
  iterator.  Patch by Gregory Nofi.

2451 2452 2453
- Issue #8195: Fix a crash in sqlite Connection.create_collation() if the
  collation name contains a surrogate character.

2454 2455 2456
- 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".
2457

2458 2459
- Issue #6547: Added the ignore_dangling_symlinks option to shutil.copytree.

2460
- Issue #1540112: Now allowing the choice of a copy function in shutil.copytree.
2461

2462 2463 2464
- Issue #4814: timeout parameter is now applied also for connections resulting
  from PORT/EPRT commands.

2465 2466
- Issue #8463: added missing reference to bztar in shutil's documentation.

2467 2468
- 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').
2469

2470 2471
- Issue #3817: ftplib.FTP.abort() method now considers 225 a valid response code
  as stated in RFC-959 at chapter 5.4.
2472

2473 2474 2475
- Issue #8394: _ctypes.dlopen() accepts bytes, bytearray and str with
  surrogates.

2476
- Issue #850728: Add a *timeout* parameter to the `acquire()` method of
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2477
  `threading.Semaphore` objects.  Original patch by Torsten Landschoff.
2478

2479 2480 2481
- 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.

2482 2483 2484
- Issue #8393: subprocess accepts bytes, bytearray and str with surrogates for
  the current working directory.

2485
- Issue #7606: XML-RPC traceback stored in X-traceback is now encoded to ASCII
2486
  using backslashreplace error handler.
2487

2488
- Issue #8412: os.system() now accepts bytes, bytearray and str with surrogates.
2489

2490 2491 2492
- Issue #2987: RFC2732 support for urlparse (IPv6 addresses). Patch by Tony
  Locke and Hans Ulrich Niedermann.

2493 2494
- Issue #5277: Fix quote counting when parsing RFC 2231 encoded parameters.

2495
- Issue #7316: The acquire() method of lock objects in the :mod:`threading`
2496
  module now takes an optional timeout argument in seconds.  Timeout support
2497
  relies on the system threading library, so as to avoid a semi-busy wait loop.
2498

2499 2500
- Issue #8383: pickle and pickletools use surrogatepass error handler when
  encoding unicode as utf8 to support lone surrogates and stay compatible with
2501
  Python 2.x and 3.x.
2502

2503
- Issue #7585: difflib context and unified diffs now place a tab between
2504 2505
  filename and date, conforming to the 'standards' they were originally designed
  to follow.  This improves compatibility with patch tools.
2506

2507
- Issue #7472: Fixed typo in email.encoders module; messages using ISO-2022
2508 2509
  character sets will now consistently use a Content-Transfer-Encoding of 7bit
  rather than sometimes being marked as 8bit.
2510

2511 2512 2513
- Issue #8375: test_distutils now checks if the temporary directory are still
  present before it cleans them.

2514 2515
- Issue #8374: Update the internal alias table in the :mod:`locale` module to
  cover recent locale changes and additions.
2516

2517
- Issue #8321: Give access to OpenSSL version numbers from the `ssl` module,
2518 2519
  using the new attributes `ssl.OPENSSL_VERSION`, `ssl.OPENSSL_VERSION_INFO` and
  `ssl.OPENSSL_VERSION_NUMBER`.
2520

2521 2522
- Add functools.total_ordering() and functools.cmp_to_key().

2523 2524
- Issue #8257: The Decimal construct now accepts a float instance directly,
  converting that float to a Decimal of equal value:
2525 2526 2527 2528

     >>> Decimal(1.1)
     Decimal('1.100000000000000088817841970012523233890533447265625')

2529 2530
- Issue #8294: The Fraction constructor now accepts Decimal and float instances
  directly.
2531

2532 2533 2534 2535
- 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.
2536

2537 2538 2539 2540 2541
- 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.
2542

2543 2544
- Added a subtract() method to collections.Counter().

2545
- Issue #8233: When run as a script, py_compile.py optionally takes a single
2546 2547 2548
  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).
2549

2550 2551
- Backwards incompatible change: Unicode codepoints line tabulation (0x0B) and
  form feed (0x0C) are now considered linebreaks, as specified in Unicode
2552
  Standard Annex #14.  See issue #7643.  http://www.unicode.org/reports/tr14/
2553

2554 2555 2556 2557
- 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.
2558

2559 2560 2561
- 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.
2562

2563 2564 2565
- Issue #8205: Remove the "Modules" directory from sys.path when Python is
  running from the build directory (POSIX only).

2566
- Issue #7512: shutil.copystat() could raise an OSError when the filesystem
2567 2568
  didn't support chflags() (for example ZFS under FreeBSD).  The error is now
  silenced.
2569

2570 2571
- Issue #7860: platform.uname now reports the correct 'machine' type when Python
  is running in WOW64 mode on 64 bit Windows.
2572

Antoine Pitrou's avatar
Antoine Pitrou committed
2573 2574 2575
- 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.
2576

2577 2578 2579 2580
- 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.

2581 2582
- Issue #8179: Fix macpath.realpath() on a non-existing path.

2583 2584
- Issue #8024: Update the Unicode database to 5.2.

2585 2586
- Issue #8168: py_compile now handles files with utf-8 BOMS.

2587 2588 2589
- ``tokenize.detect_encoding`` now returns ``'utf-8-sig'`` when a UTF-8 BOM is
  detected.

2590 2591
- Issue #6716/2: Backslash-replace error output in compilall.

2592 2593 2594
- Issue #4961: Inconsistent/wrong result of askyesno function in tkMessageBox
  with Tcl/Tk-8.5.

2595
- Issue #8140: extend compileall to compile single files.  Add -i option.
2596

2597 2598
- Issue #7356: ctypes.util: Make parsing of ldconfig output independent of the
  locale.
2599

2600 2601 2602
- 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.
2603

2604 2605 2606 2607
- 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).
2608

2609 2610 2611
- Issue #6472: The xml.etree package is updated to ElementTree 1.3.  The
  cElementTree module is updated too.

2612
- Issue #7774: Set sys.executable to an empty string if argv[0] has been set to
2613 2614
  an non existent program name and Python is unable to retrieve the real program
  name.
2615

2616 2617
- Issue #7880: Fix sysconfig when the python executable is a symbolic link.

2618 2619
- Issue #6509: fix re.sub to work properly when the pattern, the string, and the
  replacement were all bytes.  Patch by Antoine Pitrou.
2620

2621 2622 2623
- The sqlite3 module was updated to pysqlite 2.6.0. This fixes several obscure
  bugs and allows loading SQLite extensions from shared libraries.

2624 2625
- Issue #1054943: Fix ``unicodedata.normalize('NFC', text)`` for the Public
  Review Issue #29 (http://unicode.org/review/pr-29.html).
2626

2627 2628 2629
- Issue #7494: fix a crash in _lsprof (cProfile) after clearing the profiler,
  reset also the pointer to the current pointer context.

2630 2631 2632
- Issue #7232: Add support for the context manager protocol to the TarFile
  class.

2633 2634 2635
- Issue #7250: Fix info leak of os.environ across multi-run uses of
  wsgiref.handlers.CGIHandler.

2636 2637
- Issue #1729305: Fix doctest to handle encode error with "backslashreplace".

2638 2639 2640
- Issue #691291: codecs.open() should not convert end of lines on reading and
  writing.

2641 2642 2643 2644 2645 2646
- Issue #7869: logging: improved diagnostic for format-time errors.

- Issue #7868: logging: added loggerClass attribute to Manager.

- logging: Implemented PEP 391.

2647
- Issue #1537721: Add a writeheader() method to csv.DictWriter.
Benjamin Peterson's avatar
Benjamin Peterson committed
2648

2649 2650
- Issue #7959: ctypes callback functions are now registered correctly with the
  cycle garbage collector.
2651

2652 2653
- Issue #5801: removed spurious empty lines in wsgiref.

2654 2655
- 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.
2656

2657 2658
- Issue #7597: curses.use_env() can now be called before initscr().  Noted by
  Kan-Ru Chen.
2659

2660 2661
- Issue #7310: fix the __repr__ of os.environ to show the environment variables.

2662 2663 2664
- Issue #7970: email.Generator.flatten now correctly flattens message/rfc822
  messages parsed by email.Parser.HeaderParser.

Brett Cannon's avatar
Brett Cannon committed
2665 2666 2667
- Issue #7361: Importlib was not properly checking the number of bytes in
  bytecode file when it was less then 8 bytes.

2668 2669 2670 2671
- 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.
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2673 2674 2675
- Issue #7835: shelve should no longer produce mysterious warnings during
  interpreter shutdown.

2676 2677 2678 2679
- 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.
2680

2681 2682 2683
- 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.
2684

2685 2686
- Issue #6003: add an argument to ``zipfile.Zipfile.writestr`` to specify the
  compression type.
2687

2688 2689
- Issue #4772: Raise a ValueError when an unknown Bluetooth protocol is
  specified, rather than fall through to AF_PACKET (in the `socket` module).
2690 2691
  Also, raise ValueError rather than TypeError when an unknown TIPC address type
  is specified.  Patch by Brian Curtin.
2692

2693 2694 2695
- 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
2696 2697
  ftruncate() and other truncation APIs.  Patch by Pascal Chambon.

2698
- Issue #7610: Reworked implementation of the internal
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  :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.
2704

2705
- Issue #6963: Added "maxtasksperchild" argument to multiprocessing.Pool,
2706 2707
  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.
2708

2709 2710
- Issue #7792: Registering non-classes to ABCs raised an obscure error.

Benjamin Peterson's avatar
Benjamin Peterson committed
2711
- Issue #7785: Don't accept bytes in FileIO.write().
2712

2713 2714
- Removed the functions 'verify' and 'vereq' from Lib/test/support.py.

2715 2716 2717
- Issue #7773: Fix an UnboundLocalError in platform.linux_distribution() when
  the release file is empty.

2718 2719 2720
- Issue #7561: Fix crashes when using bytearray objects with the posix
  module.

2721 2722 2723
- 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.
2724

2725 2726
- Issue #7703: Add support for the new buffer API to `binascii.a2bhqx`.  Patch
  by Florent Xicluna, along with some additional tests.
2727

2728 2729
- Issue #7701: Fix crash in binascii.b2a_uu() in debug mode when given a 1-byte
  argument.  Patch by Victor Stinner.
2730

2731 2732
- Issue #3299: Fix possible crash in the _sre module when given bad argument
  values in debug mode.  Patch by Victor Stinner.
2733

2734 2735
- Issue #2846: Add support for gzip.GzipFile reading zero-padded files.  Patch
  by Brian Curtin.
2736

2737 2738
- Issue #7681: Use floor division in appropiate places in the wave module.

2739 2740 2741 2742
- 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.

2743 2744
- Issue #7617: Make sure distutils.unixccompiler.UnixCCompiler recognizes gcc
  when it has a fully qualified configuration prefix. Initial patch by Arfrever.
2745

2746 2747
- Issue #7105: Make WeakKeyDictionary and WeakValueDictionary robust against the
  destruction of weakref'ed objects while iterating.
2748

2749 2750
- Issue #7455: Fix possible crash in cPickle on invalid input.  Patch by Victor
  Stinner.
2751

2752
- Issue #1628205: Socket file objects returned by socket.socket.makefile() now
2753 2754
  properly handles EINTR within the read, readline, write & flush methods.  The
  socket.sendall() method now properly handles interrupted system calls.
2755

2756 2757 2758
- 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.
2759 2760

- Issue #3972: http.client.HTTPConnection now accepts an optional source_address
2761 2762 2763 2764
  parameter to allow specifying where your connections come from.

- socket.create_connection now accepts an optional source_address parameter.

2765 2766
- Issue #5511: now zipfile.ZipFile can be used as a context manager.  Initial
  patch by Brian Curtin.
2767

2768 2769 2770
- 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.
2771

2772 2773 2774
- 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.
2775

2776 2777 2778
- Issue #7231: urllib2 cannot handle https with proxy requiring auth.  Patch by
  Tatsuhiro Tsujikawa.

2779 2780 2781
- 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.
2782

2783 2784 2785 2786
- 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.

2787
- Issue #7357: tarfile no longer suppresses fatal extraction errors by default.
2788

2789 2790
- Issue #5949: added check for correct lineends in input from IMAP server in
  imaplib.
2791

2792
- Add count() and reverse() methods to collections.deque().
2793

2794 2795
- Fix variations of extending deques:  d.extend(d)  d.extendleft(d)  d+=d

2796 2797
- Issue #6986: Fix crash in the JSON C accelerator when called with the wrong
  parameter types.  Patch by Victor Stinner.
2798

2799
- Issue #7457: added a read_pkg_file method to
2800 2801
  distutils.dist.DistributionMetadata.

2802 2803 2804
- logging: Added optional `secure` parameter to SMTPHandler, to enable use of
  TLS with authentication credentials.

2805 2806
- Issue #1923: Fixed the removal of meaningful spaces when PKG-INFO is generated
  in Distutils.  Patch by Stephen Emslie.
2807

2808 2809 2810
- Issue #4120: Drop reference to CRT from manifest when building extensions with
  msvc9compiler.

2811
- Issue #7333: The `posix` module gains an `initgroups()` function providing
2812 2813
  access to the initgroups(3) C library call on Unix systems which implement it.
  Patch by Jean-Paul Calderone.
2814

2815 2816 2817 2818
- 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.

2819
- Issue #4486: When an exception has an explicit cause, do not print its
2820 2821
  implicit context too.  This affects the `traceback` module as well as built-in
  exception printing.
2822

2823 2824
- Issue #1515: Enable use of deepcopy() with instance methods.  Patch by Robert
  Collins.
2825

2826 2827
- Issue #7403: logging: Fixed possible race condition in lock creation.

2828 2829 2830 2831
- 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.

2832 2833 2834
- Issue #5788: `datetime.timedelta` objects get a new `total_seconds()` method
  returning the total number of seconds in the duration.  Patch by Brian
  Quinlan.
2835

2836 2837
- Issue #7133: SSL objects now support the new buffer API.

2838
- Issue #1488943: difflib.Differ() doesn't always add hints for tab characters.
2839

2840 2841 2842
- Issue #6123: tarfile now opens empty archives correctly and consistently
  raises ReadError on empty files.

2843
- Issue #7354: distutils.tests.test_msvc9compiler - dragfullwindows can be 2.
2844

Benjamin Peterson's avatar
Benjamin Peterson committed
2845 2846
- Issue #5037: Proxy the __bytes__ special method instead to __bytes__ instead
  of __str__.
2847

2848 2849
- Issue #7341: Close the internal file object in the TarFile constructor in case
  of an error.
2850

2851 2852 2853
- Issue #7293: distutils.test_msvc9compiler is fixed to work on any fresh
  Windows box. Help provided by David Bolen.

2854 2855
- Issue #2054: ftplib now provides an FTP_TLS class to do secure FTP using TLS
  or SSL.  Patch by Giampaolo Rodola'.
2856

2857
- Issue #7328: pydoc no longer corrupts sys.path when run with the '-m' switch.
2858

2859 2860
- Issue #4969: The mimetypes module now reads the MIME database from the
  registry under Windows.  Patch by Gabriel Genellina.
2861

2862 2863 2864 2865
- 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
2866 2867
  support the same flexibility as the CPython command line itself.

2868 2869 2870
- 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.
2871

2872
- Issue #7197: Allow unittest.TextTestRunner objects to be pickled and
2873
  unpickled.  This fixes crashes under Windows when trying to run
2874 2875
  test_multiprocessing in verbose mode.

2876 2877 2878
- 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.
2879

2880
- Issue #7588: ``unittest.TextTestResult.getDescription`` now includes the test
2881 2882
  name in failure reports even if the test has a docstring.

2883
- Issue #3001: Add a C implementation of recursive locks which is used by
2884 2885 2886
  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).
2887

2888 2889
- Issue #7282: Fix a memory leak when an RLock was used in a thread other than
  those started through `threading.Thread` (for example, using
2890 2891
  `_thread.start_new_thread()`).

2892 2893 2894
- Issue #7187: Importlib would not silence the IOError raised when trying to
  write new bytecode when it was made read-only.

2895 2896 2897
- Issue #7264: Fix a possible deadlock when deallocating thread-local objects
  which are part of a reference cycle.

2898 2899 2900
- Issue #7211: Allow 64-bit values for the `ident` and `data` fields of kevent
  objects on 64-bit systems.  Patch by Michael Broghton.

2901 2902 2903
- 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.
2904

2905 2906 2907 2908
- 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.
2909

2910 2911 2912 2913
- 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.
2914

2915 2916 2917
- Issue #4750: Store the basename of the original filename in the gzip FNAME
  header as required by RFC 1952.

2918 2919 2920
- Issue #1180: Added a new global option to ignore ~/.pydistutils.cfg in
  Distutils.

2921 2922 2923
- Issue #7218: Fix test_site for win32, the directory comparison was done with
  an uppercase.

2924 2925 2926
- Issue #7205: Fix a possible deadlock when using a BZ2File object from
  several threads at once.

2927 2928
- Issue #7077: logging: SysLogHandler now treats Unicode as per RFC 5424.

2929 2930 2931
- Issue #7099: Decimal.is_normal now returns True for numbers with exponent
  larger than emax.

2932 2933 2934
- Issue #7080: locale.strxfrm() raises a MemoryError on 64-bit non-Windows
  platforms, and assorted locale fixes by Derk Drukker.

2935 2936
- Issue #5833: Fix extra space character in readline completion with the GNU
  readline library version 6.0.
2937

2938
- Issue #6894: Fixed the issue urllib2 doesn't respect "no_proxy" environment.
2939

2940 2941
- Issue #7086: Added TCP support to SysLogHandler, and tidied up some
  anachronisms in the code which were a relic of 1.5.2 compatibility.
2942

2943 2944
- Issue #7082: When falling back to the MIME 'name' parameter, the correct place
  to look for it is the Content-Type header.
2945

2946 2947 2948
- Make tokenize.detect_coding() normalize utf-8 and iso-8859-1 variants like the
  builtin tokenizer.

2949 2950
- Issue #7048: Force Decimal.logb to round its result when that result is too
  large to fit in the current precision.
2951

2952 2953
- 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.
2954

2955 2956
- Issue #4606: Passing 'None' if ctypes argtype is set to POINTER(...)  does now
  always result in NULL.
2957

2958 2959
- Issue #5042: Structure sub-subclass does now initialize correctly with base
  class positional arguments.
2960

2961 2962
- Issue #6882: Import uuid creates zombies processes.

2963 2964
- Issue #6635: Fix profiler printing usage message.

2965 2966
- Issue #6856: Add a filter keyword argument to TarFile.add().

2967 2968
- Issue #6888: pdb's alias command was broken when no arguments were given.

2969
- Issue #6857: Default format() alignment should be '>' for Decimal instances.
2970

2971 2972 2973
- Issue #6795: int(Decimal('nan')) now raises ValueError instead of returning
  NaN or raising InvalidContext.  Also, fix infinite recursion in
  long(Decimal('nan')).
2974

2975 2976
- Issue #6850: Fix bug in Decimal._parse_format_specifier for formats with no
  type specifier.
2977

2978 2979
- Issue #6239: ctypes.c_char_p return value must return bytes.

2980 2981 2982 2983
- 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'.
2984

2985 2986 2987
- Trying to import a submodule from a module that is not a package, ImportError
  should be raised, not AttributeError.

2988 2989 2990
- When the globals past to importlib.__import__() has __package__ set to None,
  fall back to computing what __package__ should be instead of giving up.

2991
- Raise a TypeError when the name of a module to be imported for
2992
  importlib.__import__ is not a string (was raising an AttributeError before).
2993

2994 2995
- Allow the fromlist passed into importlib.__import__ to be any iterable.

2996 2997
- Have importlib raise ImportError if None is found in sys.modules.

2998 2999
- Issue #6054: Do not normalize stored pathnames in tarfile.

3000 3001 3002
- Issue #6794: Fix Decimal.compare_total and Decimal.compare_total_mag: NaN
  payloads are now ordered by integer value rather than lexicographically.

3003 3004 3005 3006 3007 3008 3009 3010 3011
- 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.

3012 3013
- Issue #6665: Fix fnmatch to properly match filenames with newlines in them.

3014 3015
- Issue #1135: Add the XView and YView mix-ins to avoid duplicating the xview*
  and yview* methods.
3016

3017 3018 3019 3020 3021
- 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.

3022 3023
- Issue #6622: Fix "local variable 'secret' referenced before assignment" bug in
  POP3.apop.
3024

3025 3026
- Issue #2715: Remove remnants of Carbon.File from binhex module.

3027 3028 3029
- 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].
3030

3031 3032 3033
- Issue #6106: telnetlib.Telnet.process_rawq doesn't handle default WILL/WONT
  DO/DONT correctly.

3034
- Issue #1424152: Fix for http.client, urllib.request to support SSL while
3035 3036
  working through proxy.  Original patch by Christopher Li, changes made by
  Senthil Kumaran.
3037

3038
- Add importlib.abc.ExecutionLoader to represent the PEP 302 protocol for
3039 3040 3041
  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.
3042

3043 3044 3045 3046
- 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.

3047 3048 3049
- 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.
3050

Antoine Pitrou's avatar
Antoine Pitrou committed
3051
- Issue #6415: Fixed warnings.warn segfault on bad formatted string.
3052

3053 3054
- Issue #6358: The exit status of a command started with os.popen() was reported
  differently than it did with python 2.x.
3055

3056 3057
- Issue #6323: The pdb debugger did not exit when running a script with a syntax
  error.
3058

3059 3060 3061
- Issue #3392: The subprocess communicate() method no longer fails in select()
  when file descriptors are large; communicate() now uses poll() when possible.

3062 3063
- Issue #6369: Fix an RLE decompression bug in the binhex module.

3064 3065
- Issue #6344: Fixed a crash of mmap.read() when passed a negative argument.

Benjamin Peterson's avatar
Benjamin Peterson committed
3066 3067
- The deprecated function string.maketrans has been removed.

3068 3069 3070
- Issue #4005: Fixed a crash of pydoc when there was a zip file present in
  sys.path.

3071 3072
- Issue #6218: io.StringIO and io.BytesIO instances are now picklable.

3073 3074
- 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.
3075

3076 3077 3078
- Issue #7481: When a threading.Thread failed to start it would leave the
  instance stuck in initial state and present in threading.enumerate().

3079 3080
- Issue #1068268: The subprocess module now handles EINTR in internal os.waitpid
  and os.read system calls where appropriate.
3081

3082 3083
- Issue #6729: Added ctypes.c_ssize_t to represent ssize_t.

3084 3085
- Issue #6247: The argparse module has been added to the standard library.

3086 3087
- Issue #8235: _socket: Add the constant ``SO_SETFIB``.  SO_SETFIB is a socket
  option available on FreeBSD 7.1 and newer.
3088

3089 3090 3091
- Issue #9315: Fix for the trace module to record correct class name
  for tracing methods.

3092 3093
Extension Modules
-----------------
3094

3095 3096 3097
- Issue #9959: Tweak formula used for computing math.log of an integer,
  making it marginally more accurate for exact powers of 2.

3098 3099
- Issue #9422: Fix memory leak when re-initializing a struct.Struct object.

3100
- Issue #7900: The getgroups(2) system call on MacOSX behaves rather oddly
3101 3102 3103 3104
  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.
3105

3106 3107
- Issue #6095: Make directory argument to os.listdir optional.

3108 3109 3110
- 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.
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Mark Dickinson committed
3111

3112 3113
- Issue #5180: Fixed a bug that prevented loading 2.x pickles in 3.x python when
  they contain instances of old-style classes.
3114

3115 3116
- Issue #9165: Add new functions math.isfinite and cmath.isfinite, to accompany
  existing isinf and isnan functions.
3117

3118 3119
- Issue #1578269: Implement os.symlink for Windows 6.0+.  Patch by Jason
  R. Coombs.
3120

Benjamin Peterson's avatar
Benjamin Peterson committed
3121 3122 3123
- In struct.pack, correctly propogate exceptions from computing the truth of an
  object in the '?' format.

3124 3125
- Issue #9000: datetime.timezone objects now have eval-friendly repr.

Benjamin Peterson's avatar
Benjamin Peterson committed
3126 3127
- In the math module, correctly lookup __trunc__, __ceil__, and __floor__ as
  special methods.
3128

3129 3130 3131 3132
- 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.
3133

3134 3135 3136 3137 3138 3139
- 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.
3140

3141
- Issue #5094: The ``datetime`` module now has a simple concrete class
3142 3143 3144 3145 3146
  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.
3147

3148 3149
- Issue #8973: Add __all__ to struct module; this ensures that help(struct)
  includes documentation for the struct.Struct class.
3150

3151
- Issue #3129: Trailing digits in struct format string are no longer ignored.
3152
  For example, "1" or "ilib123" are now invalid formats and cause
3153
  ``struct.error`` to be raised.  Patch by Caleb Deveraux.
3154

3155 3156 3157
- 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
3158

3159 3160
- Issue #2810: Fix cases where the Windows registry API returns ERROR_MORE_DATA,
  requiring a re-try in order to get the complete result.
3161

3162 3163 3164 3165 3166
- 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.
3167

3168 3169 3170
- Issue #8674: Fixed a number of incorrect or undefined-behaviour-inducing
  overflow checks in the audioop module.

3171 3172
- Issue #8644: The accuracy of td.total_seconds() has been improved (by
  calculating with integer arithmetic instead of float arithmetic internally):
3173 3174
  the result is now always correctly rounded, and is equivalent to ``td /
  timedelta(seconds=1)``.
3175

3176 3177 3178
- Issue #2706: Allow division of a timedelta by another timedelta: timedelta /
  timedelta, timedelta % timedelta, timedelta // timedelta and divmod(timedelta,
  timedelta) are all supported.
3179

3180 3181
- Issue #8314: Fix unsigned long long bug in libffi on Sparc v8.

3182 3183 3184 3185 3186
- 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.

3187 3188
- Issue #8142: Update libffi to the 3.0.9 release.

3189 3190
- Issue #6949: Allow the _dbm extension to be built with db 4.8.x.

3191
- Issue #6544: Fix a reference leak in the kqueue implementation's error
3192 3193
  handling.

3194 3195 3196
- Stop providing crtassem.h symbols when compiling with Visual Studio 2010, as
  msvcr100.dll is not a platform assembly anymore.

3197 3198
- Issue #6508: Add posix.{getresuid,getresgid,setresuid,setresgid}.

3199 3200
- Issue #7078: Set struct.__doc__ from _struct.__doc__.

3201
- Issue #3366: Add erf, erfc, expm1, gamma, lgamma functions to math module.
3202

3203 3204
- Issue #6877: It is now possible to link the readline extension to the libedit
  readline emulation on OSX 10.5 or later.
3205

3206 3207
- Issue #6848: Fix curses module build failure on OS X 10.6.

3208 3209
- Fix a segfault that could be triggered by expat with specially formed input.

3210 3211 3212
- 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'.
3213

3214 3215
- 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.
3216

3217 3218
- Issue #2389: Array objects are now pickled in a portable manner.

3219 3220 3221
- Expat: Fix DoS via XML document with malformed UTF-8 sequences
  (CVE_2009_3560).

3222 3223 3224
- 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.
3225

3226 3227 3228
- Issue #7999: os.setreuid() and os.setregid() would refuse to accept a -1
  parameter on some platforms such as OS X.

3229 3230
- Build the ossaudio extension on GNU/kFreeBSD.

3231 3232
- Issue #7347: winreg: Add CreateKeyEx and DeleteKeyEx, as well as fix a bug in
  the return value of QueryReflectionKey.
3233

3234
- Issue #7567: PyCurses_setupterm: Don't call ``setupterm`` twice.
3235

3236 3237 3238
Build
-----

3239 3240
- Use OpenSSL 1.0.0a on Windows.

3241 3242
- Issue #9280: Make sharedinstall depend on sharedmods.

3243 3244 3245 3246 3247
- 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.
3248

3249 3250
- Issue #8854: Fix finding Visual Studio 2008 on Windows x64.

3251 3252
- Issue #1759169, #8864: Drop _XOPEN_SOURCE on Solaris, define it for
  multiprocessing only.
3253

3254 3255 3256 3257
- 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.)
3258

3259 3260
- Issue #3646: It is now easily possible to install a Python framework into your
  home directory on MacOSX, see Mac/README for more information.
3261

3262 3263
- Issue #3928: os.mknod() now available in Solaris, also.

3264 3265 3266
- Issue #3326: Build Python without -fno-strict-aliasing when the gcc does not
  give false warnings.

3267 3268 3269
- 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.
3270

3271 3272
- Issue #6716: Quote -x arguments of compileall in MSI installer.  Exclude 2to3
  tests from compileall.
3273

3274
- Issue #3920, #7903: Define _BSD_SOURCE on OpenBSD 4.4 through 4.9.
3275

3276 3277 3278
- 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.
3279

3280 3281 3282 3283 3284
- 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.

3285 3286 3287 3288
- 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.

3289 3290 3291
- Issue #7589: Only build the nis module when the correct header files are
  found.

3292
- Switch to OpenSSL 0.9.8l and sqlite 3.6.21 on Windows.
3293

3294 3295 3296
- Issue #5792: Extend the short float repr support to x86 systems using
  icc or suncc.

3297 3298 3299
- 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.
3300

3301
- Issue #6802: Fix build issues on MacOSX 10.6.
3302

3303 3304
- Issue #6244: Allow detect_tkinter to look for Tcl/Tk 8.6.

3305
- Issue #4601: 'make install' did not set the appropriate permissions on
3306 3307
  directories.

3308
- Issue #5390: Add uninstall icon independent of whether file extensions are
3309
  installed.
3310

3311
- Issue #7541: When using ``python-config`` with a framework install the
3312
  compiler might use the wrong library.
3313

3314 3315
- python-config now supports multiple options on the same command line.

3316 3317
- Issue #8509: Fix quoting in help strings and code snippets in configure.in.

3318 3319
- Issue #8510: Update to autoconf2.65.

3320
Documentation
3321
-------------
3322

3323 3324 3325
- Issue #9817: Add expat COPYING file; add expat, libffi and expat licenses
  to Doc/license.rst.

3326 3327 3328
- Issue #9524: Document that two CTRL* signals are meant for use only
  with os.kill.

3329
- Issue #9255: Document that the 'test' package is meant for internal Python use
3330 3331
  only.

3332
- A small WSGI server was added as Tools/scripts/serve.py, and is used to
3333 3334
  implement a local documentation server via 'make serve' in the doc directory.

3335 3336
- Updating `Using Python` documentation to include description of CPython's -J
  and -X options.
3337

3338 3339 3340
- Document that importing a module that has None in sys.modules triggers an
  ImportError.

3341 3342
- Issue #6556: Fixed the Distutils configuration files location explanation for
  Windows.
3343

3344 3345
- Update python manual page (options -B, -O0, -s, environment variables
  PYTHONDONTWRITEBYTECODE, PYTHONNOUSERSITE).
3346

3347 3348 3349
- Issue #8909: Added the size of the bitmap used in the installer created by
  distutils' bdist_wininst. Patch by Anatoly Techtonik.

3350 3351 3352
Tests
-----

3353 3354
- Issue #9251: test_threaded_import didn't fail when run through regrtest if the
  import lock was disabled.
3355

3356 3357
- Issue #8605: Skip test_gdb if Python is compiled with optimizations.

3358
- Issue #7449: Skip test_socketserver if threading support is disabled.
3359

3360 3361 3362
- 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).
3363

3364
- Issue #8533: regrtest uses backslashreplace error handler for stdout to avoid
3365
  UnicodeEncodeError (write non-ASCII character to stdout using ASCII encoding).
3366

3367 3368 3369
- Issue #8576: Remove use of find_unused_port() in test_smtplib and
  test_multiprocessing.  Patch by Paul Moore.

3370 3371 3372
- Issue #7449: Fix many tests to support Python compiled without thread
  support. Patches written by Jerry Seutter.

3373 3374
- Issue #8108: test_ftplib's non-blocking SSL server now has proper handling of
  SSL shutdowns.
3375

3376 3377
- Issues #8279, #8330, #8437, #8480, #8495: Fix test_gdb failures, patch written
  by Dave Malcolm.
3378

3379 3380
- 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.
3381

3382 3383
- Issue #8193: Fix test_zlib failure with zlib 1.2.4.

3384 3385
- Issue #8248: Add some tests for the bool type.  Patch by Gregory Nofi.

3386 3387 3388
- Issue #8263: Now regrtest.py will report a failure if it receives a
  KeyboardInterrupt (SIGINT).

3389 3390
- Issue #8180 and #8207: Fix test_pep277 on OS X and add more tests for special
  Unicode normalization cases.
3391

3392 3393
- Issue #7783: test.support.open_urlresource invalidates the outdated files from
  the local cache.
3394

3395 3396 3397
- Issue #7849: Now the utility ``check_warnings`` verifies if the warnings are
  effectively raised.

3398 3399
- The four path modules (genericpath, macpath, ntpath, posixpath) share a common
  TestCase for some tests: test_genericpath.CommonTest.
3400

3401 3402
- Print platform information when running the whole test suite, or using the
  --verbose flag.
3403

3404 3405 3406
- Issue #767675: enable test_pep277 on POSIX platforms with Unicode-friendly
  filesystem encoding.

3407 3408
- 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.
3409

3410 3411 3412 3413
- 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.
3414

3415 3416 3417
- 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.
3418

3419 3420
- Issue #7728: test_timeout was changed to use support.bind_port instead of a
  hard coded port.
3421

3422
- Issue #7376: Instead of running a self-test (which was failing) when called
3423 3424
  with no arguments, doctest.py now gives a usage message.

3425 3426
- Issue #7396: fix regrtest -s, which was broken by the -j enhancement.

3427
- Issue #7498: test_multiprocessing now uses test.support.find_unused_port
3428 3429
  instead of a hardcoded port number in test_rapid_restart.

3430 3431 3432
- 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.
3433

3434 3435
- Issue #7324: Add a sanity check to regrtest argument parsing to catch the case
  of an option with no handler.
3436

3437 3438
- Issue #7312: Add a -F flag to run the selected tests in a loop until a test
  fails.  Can be combined with -j.
3439

3440 3441 3442 3443
- 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.
3444

3445 3446
- Issue #7295: Do not use a hardcoded file name in test_tarfile.

3447 3448 3449
- Issue #7270: Add some dedicated unit tests for multi-thread synchronization
  primitives such as Lock, RLock, Condition, Event and Semaphore.

3450 3451 3452 3453
- 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.

3454 3455 3456 3457
- 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.

3458
- Issue #7222: Make thread "reaping" more reliable so that reference
3459 3460 3461
  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:
3462 3463
  :func:`_thread._count()`.

3464 3465
- 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.
3466

3467 3468 3469
- 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
3470
- Issue #7058: Added save/restore for things like sys.argv and cwd to
3471 3472
  runtest_inner in regrtest, with warnings if the called test modifies them, and
  a new section in the summary report at the end.
3473

3474 3475
- Issue #7042: Fix test_signal (test_itimer_virtual) failure on OS X 10.6.

3476 3477 3478
- 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.
3479

3480
- Removed importlib's custom test discovery code and switched to
3481
  unittest.TestLoader.discover().
3482

3483 3484 3485
Tools/Demos
-----------

3486
- Issue #5464, #8974: Implement plural forms in msgfmt.py.
3487

3488
- iobench (a file I/O benchmark) and ccbench (a concurrency benchmark) were
3489
  added to the `Tools/` directory.  They were previously living in the sandbox.
3490

Benjamin Peterson's avatar
Benjamin Peterson committed
3491

3492 3493 3494 3495 3496 3497 3498 3499
What's New in Python 3.1?
=========================

*Release date: 27-June-2009*

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

Mark Dickinson's avatar
Mark Dickinson committed
3500 3501 3502
- Issue #6334: Fix bug in range length calculation for ranges with
  large arguments.

3503 3504 3505
- Issue #6329: Fixed iteration for memoryview objects (it was being blocked
  because it wasn't recognized as a sequence).

3506 3507 3508
Library
-------

3509 3510
- Issue #6126: Fixed pdb command-line usage.

3511
- Issue #6314: logging: performs extra checks on the "level" argument.
3512

3513 3514
- Issue #6274: Fixed possible file descriptors leak in subprocess.py

3515 3516 3517
- Accessing io.StringIO.buffer now raises an AttributeError instead of
  io.UnsupportedOperation.

3518
- Issue #6271: mmap tried to close invalid file handle (-1) when anonymous.
3519 3520
  (On Unix)

3521 3522 3523
- Issue #1202: zipfile module would cause a struct.error when attempting to
  store files with a CRC32 > 2**31-1.

3524 3525 3526 3527 3528
Extension Modules
-----------------

- Issue #5590: Remove unused global variable in pyexpat extension.

3529

Antoine Pitrou's avatar
Antoine Pitrou committed
3530 3531
What's New in Python 3.1 Release Candidate 2?
=============================================
Benjamin Peterson's avatar
Benjamin Peterson committed
3532

Benjamin Peterson's avatar
Benjamin Peterson committed
3533
*Release date: 13-June-2009*
Benjamin Peterson's avatar
Benjamin Peterson committed
3534 3535 3536 3537

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

3538 3539
- Fixed SystemError triggered by "range([], 1, -1)".

3540 3541 3542
- Issue #5924: On Windows, a large PYTHONPATH environment variable
  (more than 255 characters) would be completely ignored.

3543 3544 3545
- Issue #4547: When debugging a very large function, it was not always
  possible to update the lineno attribute of the current frame.

3546
- Issue #5330: C functions called with keyword arguments were not reported by
3547
  the various profiling modules (profile, cProfile). Patch by Hagen Fürstenau.
3548

Benjamin Peterson's avatar
Benjamin Peterson committed
3549 3550 3551
Library
-------

3552
- Issue #6438: Fixed distutils.cygwinccompiler.get_versions : the regular
3553
  expression string pattern was trying to match against a bytes returned by
3554 3555
  Popen. Tested under win32 to build the py-postgresql project.

3556 3557
- Issue #6258: Support AMD64 in bdist_msi.

3558 3559 3560
- Issue #6195: fixed doctest to no longer try to read 'source' data from
  binary files.

3561 3562 3563
- Issue #5262: Fixed bug in next rollover time computation in
  TimedRotatingFileHandler.

3564 3565 3566 3567
- 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.

3568 3569 3570 3571 3572
- 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.

3573 3574
- Removed the ipaddr module.

3575 3576 3577 3578
- 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.

3579 3580
- Issue #5767: Remove sgmlop support from xmlrpc.client.

3581 3582
- Issue #6150: Fix test_unicode on wide-unicode builds.

3583 3584 3585
- Issue #6149: Fix initialization of WeakValueDictionary objects from non-empty
  parameters.

Martin v. Löwis's avatar
Martin v. Löwis committed
3586 3587 3588
Windows
-------

3589 3590
- Issue #6221: Delete test registry key before running the test.

Martin v. Löwis's avatar
Martin v. Löwis committed
3591 3592
- Issue #6158: Package Sine-1000Hz-300ms.aif in MSI file.

3593 3594 3595 3596 3597 3598 3599
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
3600

3601 3602 3603 3604 3605 3606
Build
-----

- Issue #6154: Make sure the intl library is added to LIBS if needed. Also
  added LIBS to OS X framework builds.

3607 3608 3609 3610
- Issue #5809: Specifying both --enable-framework and --enable-shared is
  an error. Configure now explicity tells you about this.


3611

Mark Dickinson's avatar
Mark Dickinson committed
3612 3613
What's New in Python 3.1 release candidate 1?
=============================================
Benjamin Peterson's avatar
Benjamin Peterson committed
3614

Benjamin Peterson's avatar
Benjamin Peterson committed
3615
*Release date: 2009-05-30*
Benjamin Peterson's avatar
Benjamin Peterson committed
3616 3617 3618 3619

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

3620 3621 3622
- Issue #6097: Escape UTF-8 surrogates resulting from mbstocs conversion
  of the command line.

3623 3624
- Issue #6012: Add cleanup support to O& argument parsing.

3625 3626 3627
- Issue #6089: Fixed str.format with certain invalid field specifiers
  that would raise SystemError.

3628 3629 3630
- Issue #5982: staticmethod and classmethod now expose the wrapped
  function with __func__.

3631 3632
- Added support for multiple context managers in the same with-statement.
  Deprecated contextlib.nested() which is no longer needed.
3633

3634 3635 3636 3637
- Issue #5829: complex("1e500") no longer raises OverflowError.  This
  makes it consistent with float("1e500") and interpretation of real
  and imaginary literals.

3638 3639
- Issue #3527: Removed Py_WIN_WIDE_FILENAMES which is not used any more.

3640 3641
- Issue #5994: the marshal module now has docstrings.

3642 3643 3644 3645 3646 3647
- 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
3648 3649 3650
Library
-------

3651 3652
- Issue #4859: Implement PEP 383 for pwd, spwd, and grp.

3653 3654
- smtplib 'login' and 'cram-md5' login are also fixed (see Issue #5259).

3655 3656 3657
- Issue #6121: pydoc now ignores leading and trailing spaces in the
  argument to the 'help' function.

3658 3659 3660
- Issue #6118: urllib.parse.quote_plus ignored the encoding and errors
  arguments for strings with a space in them.

3661 3662 3663
- collections.namedtuple() was not working with the following field
  names:  cls, self, tuple, itemgetter, and property.

3664 3665 3666
- 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.

3667 3668 3669
- Issue #6050: Don't fail extracting a directory from a zipfile if
  the directory already exists.

3670 3671 3672 3673
- 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).

3674 3675 3676
- Issue #5761: Add the name of the underlying file to the repr() of various
  IO objects.

3677 3678 3679
- Issue #5259: smtplib plain auth login no longer gives a traceback.  Fix
  by Musashi Tamura, tests by Marcin Bachry.

3680 3681 3682 3683
- 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.

3684 3685 3686
- Issue #4066: smtplib.SMTP_SSL._get_socket now correctly returns the socket.
  Patch by Farhan Ahmad, test by Marcin Bachry.

3687 3688 3689
- Issue #2116: Weak references and weak dictionaries now support copy()ing and
  deepcopy()ing.

3690 3691
- Issue #1655: Make imaplib IPv6-capable. Patch by Derek Morr.

3692 3693
- Issue #5918: Fix a crash in the parser module.

3694 3695
- Issue #1664: Make nntplib IPv6-capable. Patch by Derek Morr.

3696 3697 3698 3699 3700
- 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.

3701 3702 3703 3704
- 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.

3705
- Issue #5955: aifc's close method did not close the file it wrapped,
3706 3707
  now it does.  This also means getfp method now returns the real fp.

3708 3709 3710 3711 3712
Installation
------------

- Issue #6047: fullinstall has been removed because Python 3's executable will
  now be known as python3.
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Benjamin Peterson committed
3713

3714 3715
- Lib/smtpd.py is no longer installed as a script.

3716 3717 3718
Extension Modules
-----------------

Martin v. Löwis's avatar
Martin v. Löwis committed
3719
- Issue #3061: Use wcsftime for time.strftime where available.
3720

3721 3722
- Issue #4873: Fix resource leaks in error cases of pwd and grp.

3723 3724
- Issue #6093: Fix off-by-one error in locale.strxfrm.

Benjamin Peterson's avatar
Benjamin Peterson committed
3725 3726
- The _functools and _locale modules are now built into the libpython shared
  library instead of as extension modules.
Benjamin Peterson's avatar
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3727

3728 3729 3730 3731 3732 3733 3734
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.

3735 3736 3737
Tests
-----

3738
- Issue #5442: Tests for importlib were not properly skipping case-sensitivity
3739 3740 3741 3742 3743
  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.


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3744 3745 3746
What's New in Python 3.1 beta 1?
================================

Benjamin Peterson's avatar
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3747
*Release date: 2009-05-06*
Benjamin Peterson's avatar
Benjamin Peterson committed
3748 3749 3750 3751

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

Mark Dickinson's avatar
Mark Dickinson committed
3752 3753 3754
- Issue #5914: Add new C API function PyOS_string_to_double, and
  deprecate PyOS_ascii_strtod and PyOS_ascii_atof.

3755 3756 3757 3758
- 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.

3759 3760 3761 3762
- 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.

3763 3764 3765 3766 3767 3768 3769 3770 3771
- 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.

3772 3773
- Implement PEP 383, Non-decodable Bytes in System Character Interfaces.

3774 3775 3776 3777
- 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__.

3778 3779 3780
- Issue #4426: The UTF-7 decoder was too strict and didn't accept some legal
  sequences. Patch by Nick Barnes and Victor Stinner.

3781
- Issue #3672: Reject surrogates in utf-8 codec; add surrogatepass error handler.
3782

3783 3784 3785 3786
- 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.

3787 3788 3789 3790
- 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.
3791

3792
- Issue #1588: Add complex.__format__. For example,
3793 3794
  format(complex(1, 2./3), '.5') now produces a sensible result.

3795 3796 3797
- Issue #5864: Fix empty format code formatting for floats so that it
  never gives more than the requested number of significant digits.

3798 3799 3800
- Issue #5793: Rationalize isdigit / isalpha / tolower, etc. Includes
  new Py_ISDIGIT / Py_ISALPHA / Py_TOLOWER, etc. in pctypes.h.

3801 3802
- Issue #5835: Deprecate PyOS_ascii_formatd.

3803 3804 3805
- Issue #4971: Fix titlecase for characters that are their own
  titlecase, but not their own uppercase.

3806 3807
- Issue #5283: Setting __class__ in __del__ caused a segfault.

3808 3809 3810
- Issue #5816: complex(repr(z)) now recovers z exactly, even when
  z involves nans, infs or negative zeros.

3811
- Issue #3166: Make int -> float conversions correctly rounded.
3812

3813 3814 3815 3816 3817
- 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').

3818 3819 3820
- Issue #5787: object.__getattribute__(some_type, "__bases__") segfaulted on
  some builtin types.

3821 3822
- Issue #5772: format(1e100, '<') produces '1e+100', not '1.0e+100'.

3823 3824
- Issue #5515: str.format() type 'n' combined with commas and leading
  zeros no longer gives odd results with ints and floats.
3825 3826 3827 3828

- Implement PEP 378, Format Specifier for Thousands Separator, for
  floats.

3829
- The str function switches to exponential notation at
3830 3831 3832 3833 3834 3835 3836 3837 3838
  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.
3839 3840 3841
  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.
3842 3843 3844 3845 3846 3847 3848 3849 3850 3851 3852 3853

  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.

3854
  See issue #1580 discussions for details of platforms for which
3855 3856
  this change does not apply.

3857 3858
- Issue #5759: float() didn't call __float__ on str subclasses.

3859 3860 3861 3862 3863
- 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.

3864 3865 3866
- Issue #2170: refactored xml.dom.minidom.normalize, increasing both
  its clarity and its speed.

3867
- Issue #1113244: Py_XINCREF, Py_DECREF, Py_XDECREF: Add ``do { ... } while (0)``
3868 3869
  to avoid compiler warnings.

3870 3871 3872
- Issue #3739: The unicode-internal encoder now reports the number of characters
  consumed like any other encoder (instead of the number of bytes).

3873 3874 3875 3876 3877
Installation
------------

- Issue #5756: Install idle and pydoc with a 3 suffix.

Benjamin Peterson's avatar
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3878 3879 3880
Library
-------

3881 3882
- Issue #8203: Fix IDLE Credits dialog: view_file() uses its encoding argument.

3883 3884 3885
- Issue #5311: bdist_msi can now build packages that do not depend on a
  specific Python version.

3886 3887 3888
- Issue #5150: IDLE's format menu now has an option to strip trailing
  whitespace.

3889
- Issue #5940: distutils.command.build_clib.check_library_list was not doing
3890 3891
  the right type checkings anymore.

3892 3893 3894
- Issue #4875: On win32, ctypes.util.find_library does no longer
  return directories.

3895 3896
- Issue #5142: Add the ability to skip modules while stepping to pdb.

3897 3898 3899
- Issue #1309567: Fix linecache behavior of stripping subdirectories when
  looking for files given by a relative filename.

3900 3901 3902
- Issue #5923: Update the ``turtle`` module to version 1.1, add two new
  turtle demos in Demo/turtle.

3903 3904 3905
- Issue #5692: In :class:`zipfile.Zipfile`, fix wrong path calculation when
  extracting a file to the root directory.

3906 3907
- Issue #5913: os.listdir() should fail for empty path on windows.

3908 3909 3910 3911
- 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.

3912 3913
- The json module now works exclusively with str and not bytes.

3914 3915 3916
- Issue #3959: The ipaddr module has been added to the standard library.
  Contributed by Google.

3917 3918 3919
- Issue #3002: ``shutil.copyfile()`` and ``shutil.copytree()`` now raise an
  error when a named pipe is encountered, rather than blocking infinitely.

3920 3921
- Issue #5857: tokenize.tokenize() now returns named tuples.

3922 3923
- Issue #4305: ctypes should now build again on mipsel-linux-gnu

3924 3925 3926 3927
- 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.

3928 3929 3930 3931
- 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.

3932 3933 3934
- Issue #5854: Updated __all__ to include some missing names and remove some
  names which should not be exported.

3935 3936 3937 3938 3939
- 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.

3940 3941 3942 3943
- Issue #5812: For the two-argument form of the Fraction constructor,
  Fraction(m, n), m and n are permitted to be arbitrary Rational
  instances.

3944 3945 3946 3947
- 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.

3948 3949 3950
- Issue #5734: BufferedRWPair was poorly tested and had several glaring
  bugs. Patch by Brian Quinlan.

3951 3952 3953 3954 3955 3956
- 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.

3957 3958
- Issue #2703: SimpleXMLRPCDispatcher.__init__: Provide default values for
  new arguments introduced in 2.5.
3959 3960 3961 3962

- Issue #5828 (Invalid behavior of unicode.lower): Fixed bogus logic in
  makeunicodedata.py and regenerated the Unicode database (This fixes
  u'\u1d79'.lower() == '\x00').
3963

3964 3965 3966
Extension Modules
-----------------

3967 3968 3969
- Issue #5881: Remove old undocumented compatibility interfaces in hashlib and
  pwd.

3970 3971 3972 3973 3974
- 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
3975 3976
- Issue #5359: Readd the Berkeley DB detection code to allow _dbm be built
  using Berkeley DB.
3977

3978 3979 3980 3981 3982 3983 3984 3985 3986
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.

3987 3988 3989 3990
- Issue #5837: Certain sequences of calls to set() and unset() for
  support.EnvironmentVarGuard objects restored the environment variables
  incorrectly on __exit__.

3991 3992 3993 3994 3995
C-API
-----

- Issue #5630: A replacement PyCObject API, PyCapsule, has been added.

Benjamin Peterson's avatar
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3996

3997 3998 3999
What's New in Python 3.1 alpha 2?
=================================

Benjamin Peterson's avatar
Benjamin Peterson committed
4000
*Release date: 2009-4-4*
4001 4002 4003

Core and Builtins
-----------------
4004

4005 4006
- Implement PEP 378, Format Specifier for Thousands Separator, for
  integers.
4007

Benjamin Peterson's avatar
Benjamin Peterson committed
4008 4009
- Issue #5666: Py_BuildValue's 'c' code should create byte strings.

4010 4011 4012
- Issue #5499: The 'c' code for argument parsing functions now only accepts a
  byte, and the 'C' code only accepts a unicode character.

4013 4014 4015
- Fix a problem in PyErr_NormalizeException that leads to "undetected errors"
  when hitting the recursion limit under certain circumstances.

4016 4017
- Issue #1665206: Remove the last eager import in _warnings.c and make it lazy.

4018 4019 4020
- Fix a segfault when running test_exceptions with coverage, caused by
  insufficient checks in accessors of Exception.__context__.

4021 4022 4023 4024
- 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.

4025 4026
- Issue #5126: str.isprintable() returned False for space characters.

4027 4028 4029
- 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.

4030 4031 4032 4033 4034
- 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.

4035 4036 4037 4038
- 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.

4039 4040 4041 4042 4043 4044 4045
- 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.

4046 4047 4048 4049
- 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.

4050 4051 4052
- Issue #5237: Allow auto-numbered fields in str.format(). For
  example: '{} {}'.format(1, 2) == '1 2'.

4053 4054 4055
- 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.

4056 4057 4058
- Issue #3845: In PyRun_SimpleFileExFlags avoid invalid memory access with
  short file names.

4059 4060 4061
Library
-------

4062
- Issue #2625: added missing items() call to the for loop in
4063 4064
  mailbox.MH.get_message().

4065 4066 4067 4068
- Issue #5640: Fix _multibytecodec so that CJK codecs don't repeat
  error substitutions from non-strict codec error callbacks in
  incrementalencoder and StreamWriter.

4069 4070 4071
- Issue #5656: Fix the coverage reporting when running the test suite with
  the -T argument.

4072 4073
- Issue #5647: MutableSet.__iand__() no longer mutates self during iteration.

4074 4075
- Issue #5624: Fix the _winreg module name still used in several modules.

4076 4077
- Issue #5628: Fix io.TextIOWrapper.read() with a unreadable buffer.

4078 4079 4080
- Issue #5619: Multiprocessing children disobey the debug flag and causes
  popups on windows buildbots. Patch applied to work around this issue.

4081 4082
- Issue #5400: Added patch for multiprocessing on netbsd compilation/support

4083 4084
- Issue #5387: Fixed mmap.move crash by integer overflow.

Jesse Noller's avatar
Jesse Noller committed
4085 4086 4087
- Issue #5261: Patch multiprocessing's semaphore.c to support context
  manager use: "with multiprocessing.Lock()" works now.

4088 4089 4090
- 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
4091 4092 4093 4094
- 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
4095 4096
- Issue #5595: Fix UnboundedLocalError in ntpath.ismount().

4097 4098 4099
- Issue #1174606: Calling read() without arguments of an unbounded file
  (typically /dev/zero under Unix) could crash the interpreter.

4100 4101 4102
- The max_buffer_size arguments of io.BufferedWriter, io.BufferedRWPair, and
  io.BufferedRandom have been deprecated for removal in Python 3.2.

4103 4104 4105 4106 4107
- 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.

4108 4109 4110
- Issue #2110: Add support for thousands separator and 'n' type
  specifier to Decimal.__format__

4111 4112 4113
- Fix Decimal.__format__ bug that swapped the meanings of the '<' and
  '>' alignment characters.

4114 4115 4116
- The error detection code in FileIO.close() could fail to reflect the `errno`
  value, and report it as -1 instead.

4117 4118 4119
- Issue #5016: FileIO.seekable() could return False if the file position
  was negative when truncated to a C int. Patch by Victor Stinner.

4120 4121 4122
Extension Modules
-----------------

4123 4124
- Issue #5391: mmap now deals exclusively with bytes.

4125 4126
- Issue #5463: In struct module, remove deprecated overflow wrapping
  when packing an integer: struct.pack('=L', -1) now raises
4127 4128 4129
  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.
4130

4131

Benjamin Peterson's avatar
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4132
What's New in Python 3.1 alpha 1
Barry Warsaw's avatar
Barry Warsaw committed
4133
================================
Barry Warsaw's avatar
Barry Warsaw committed
4134

Benjamin Peterson's avatar
Benjamin Peterson committed
4135
*Release date: 2009-03-07*
Barry Warsaw's avatar
Barry Warsaw committed
4136 4137 4138 4139

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

4140 4141
- The io module has been reimplemented in C for speed.

4142 4143
- Give dict views an informative __repr__.

4144 4145 4146
- Issue #5247: Improve error message when unknown format codes are
  used when using str.format() with str, int, and float arguments.

4147 4148 4149
- Issue #5249: time.strftime returned malformed string when format string
  contained non ascii character on windows.

4150 4151 4152
- Issue #4626: compile(), exec(), and eval() ignore the coding cookie if the
  source has already been decoded into str.

4153 4154 4155
- Issue #5186: Reduce hash collisions for objects with no __hash__ method by
  rotating the object pointer by 4 bits to the right.

4156 4157 4158
- Issue #4575: Fix Py_IS_INFINITY macro to work correctly on x87 FPUs:
  it now forces its argument to double before testing for infinity.

4159 4160 4161
- Issue #5137: Make len() correctly raise a TypeError when a __len__ method
  returns a non-number type.

4162 4163
- Issue #5182: Removed memoryview.__str__.

4164 4165
- Issue #1717: Removed builtin cmp() function, dropped tp_compare
  slot, the C API functions PyObject_Compare and PyUnicode_Compare and
4166 4167
  the type definition cmpfunc.  The tp_compare slot has been renamed
  to tp_reserved, and is reserved for future usage.
4168

4169
- Issue #1242657: the __len__() and __length_hint__() calls in several tools
4170 4171
  were suppressing all exceptions.  These include list() and bytearray().

4172 4173 4174
- Issue #4707: round(x, n) now returns an integer if x is an integer.
  Previously it returned a float.

4175 4176 4177 4178 4179
- 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.

4180 4181
- Issue #4874: Most builtin decoders now reject unicode input.

4182 4183 4184
- Issue #4842: Don't allow trailing 'L' when constructing an integer
  from a string.

4185 4186
- Issue #4991: os.fdopen now raises an OSError for invalid file descriptors.

4187 4188 4189
- Issue #4838: When a module is deallocated, free the memory backing the
  optional module state data.

4190
- Issue #4910: Rename nb_long slot to nb_reserved, and change its
4191
  type to ``(void *)``.
4192

4193 4194 4195 4196
- 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.

4197 4198 4199
- Issue #3720: Fix a crash when an iterator modifies its class and removes its
  __next__ method.

4200 4201 4202 4203
- 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.

4204 4205
- Issue #4893: Use NT threading on CE.

4206 4207
- Issue #4915: Port sysmodule to Windows CE.

4208 4209 4210 4211
- 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.

4212 4213 4214 4215 4216 4217
- 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.

4218
- Issue #4604: Some objects of the I/O library could still be used after
4219 4220 4221
  having been closed (for instance, a read() call could return some
  previously buffered data). Patch by Dmitry Vasiliev.

4222 4223 4224 4225 4226
- 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).

4227 4228 4229 4230
- 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).

4231 4232 4233 4234 4235 4236
- 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.

4237 4238 4239 4240
- 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.

4241 4242
- Issue #4075: Use OutputDebugStringW in Py_FatalError.

4243 4244 4245
- 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.

4246 4247
- Issue #4797: IOError.filename was not set when ``_fileio.FileIO`` failed
  to open file with a bytes filename on Windows.
4248

4249 4250 4251
- Issue #3680: Reference cycles created through a dict, set or deque iterator
  did not get collected.

4252 4253 4254
- Issue #4701: PyObject_Hash now implicitly calls PyType_Ready on types
  where the tp_hash and tp_dict slots are both NULL.

4255 4256 4257
- Issue #4759: None is now allowed as the first argument of
  bytearray.translate().  It was always allowed for bytes.translate().

4258 4259 4260
- Added test case to ensure attempts to read from a file opened for writing
  fail.

4261 4262
- Issue #3106: Speedup some comparisons (str/str and int/int).

4263 4264 4265
- Issue #2183: Simplify and optimize bytecode for list, dict and set
  comprehensions. Original patch for list comprehensions by Neal Norwitz.

4266 4267 4268 4269
- 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.

4270 4271
- Issue #3439: Add a bit_length method to int.

4272 4273 4274 4275
- 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.

4276 4277 4278 4279
- Issue #4597: Fixed several opcodes that weren't always propagating
  exceptions.

- Issue #4589: Fixed exception handling when the __exit__ function of a
4280 4281
  context manager returns a value that cannot be converted to a bool.

4282 4283 4284 4285 4286
- 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.

4287 4288 4289 4290
- 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.

4291 4292 4293
- Issue #4509: Various issues surrounding resize of bytearray objects to
  which there are buffer exports (e.g. memoryview instances).

4294 4295 4296 4297
- 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``.
4298

4299 4300 4301
- Issue #4569: Interpreter crash when mutating a memoryview with an item size
  larger than 1.

4302 4303
- Issue #4748: Lambda generators no longer return a value.

4304 4305
- The re.sub(), re.subn() and re.split() functions now accept a flags parameter.

4306 4307 4308 4309 4310
- 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
4311 4312
Library
-------
4313

4314 4315 4316
- Issue #7071: byte-compilation in Distutils is now done with respect to
  sys.dont_write_bytecode.

4317
- Issue #7066: archive_util.make_archive now restores the cwd if an error is
4318 4319
  raised. Initial patch by Ezio Melotti.

4320
- Issue #6516: Added owner/group support when creating tar archives in
4321 4322
  Distutils.

4323 4324
- Issue #6954: Fixed crash when using DISTUTILS_DEBUG flag in Distutils.

4325 4326 4327 4328
- Issue #6163: Fixed HP-UX runtime library dir options in
  distutils.unixcompiler. Initial patch by Sridhar Ratnakumar and
  Michael Haubenwallner.

4329 4330
- Issue #6693: New functions in site.py to get user/global site packages paths.

4331 4332 4333 4334
- 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
4335 4336
  behavior is similar when used with -O.

4337 4338
- unittest has been split up into a package.  All old names should still work.

4339 4340 4341 4342 4343
- 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.

4344 4345 4346 4347
- 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
4348
- Issue #2622: Fixed an ImportError when importing email.message from a
4349 4350
  standalone application built with py2exe or py2app.

4351
- Issue #6455: Fixed test_build_ext under win32.
4352

4353
- Issue #6377: Enabled the compiler option, and deprecate its usage as an
4354 4355
  attribute.

4356 4357
- Issue #6413: Fixed the log level in distutils.dist for announce.

4358 4359
- Issue #6403: Fixed package path usage in build_ext.

4360 4361 4362 4363
- Issues #5155, 5313, 5331: multiprocessing.Process._bootstrap was
  unconditionally calling "os.close(sys.stdin.fileno())" resulting in file
  descriptor errors

4364
- Issue #6365: Distutils build_ext inplace mode was copying the compiled
4365 4366
  extension in a subdirectory if the extension name had dots.

4367
- Issue #6164: Added an AIX specific linker argument in Distutils
4368 4369
  unixcompiler. Original patch by Sridhar Ratnakumar.

4370 4371 4372
- Issue #6286: Now Distutils upload command is based on urllib2 instead of
  httplib, allowing the usage of http_proxy.

4373 4374
- Issue #6287: Added the license field in Distutils documentation.

4375 4376
- Issue #6263: Fixed syntax error in distutils.cygwincompiler.

4377 4378 4379 4380
- 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.

4381 4382 4383
- Issue #6131: test_modulefinder leaked when run after test_distutils.
  Patch by Hirokazu Yamamoto.

4384 4385
- Issue #6048: Now Distutils uses the tarfile module in archive_util.

4386
- Issue #6062: In distutils, fixed the package option of build_ext. Feedback
4387 4388
  and tests on pywin32 by Tim Golden.

4389 4390
- Issue #6053: Fixed distutils tests on win32. patch by Hirokazu Yamamoto.

4391 4392 4393
- Issue #6046: Fixed the library extension when distutils build_ext is used
  inplace. Initial patch by Roumen Petrov.

4394
- Issue #6041: Now distutils `sdist` and `register` commands use `check` as a
4395 4396
  subcommand.

4397 4398 4399
- Issue #6022: a test file was created in the current working directory by
  test_get_outputs in Distutils.

4400 4401 4402
- Issue #5977: distutils build_ext.get_outputs was not taking into account the
  inplace option. Initial patch by kxroberto.

4403 4404 4405
- Issue #5984: distutils.command.build_ext.check_extensions_list checks were broken
  for old-style extensions.

4406 4407
- Issue #5976: Fixed Distutils test_check_environ.

4408 4409 4410 4411 4412
- 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.

4413 4414
- Issue #2245: aifc now skips chunk types it doesn't recognize, per spec.

4415
- Issue #5874: distutils.tests.test_config_cmd is not locale-sensitive
4416 4417
  anymore.

4418
- Issue #5810: Fixed Distutils test_build_scripts so it uses
4419 4420
  sysconfig.get_config_vars.

4421 4422
- Issue #4951: Fixed failure in test_httpservers.

Thomas Heller's avatar
Thomas Heller committed
4423 4424
- Issue #5795: Fixed test_distutils failure on Debian ppc.

4425 4426
- Issue #5607: fixed Distutils test_get_platform for Mac OS X fat binaries.

4427 4428 4429
- Issue #5741: don't disallow "%%" (which is an escape for "%") when setting
  a value in SafeConfigParser.

4430 4431
- Issue #5732: added a new command in Distutils: check.

4432
- Issue #5731: Distutils bdist_wininst no longer worked on non-Windows
4433 4434
  platforms. Initial patch by Paul Moore.

4435 4436 4437
- Issue #5095: Added bdist_msi to the list of bdist supported formats.
  Initial fix by Steven Bethard.

4438 4439 4440
- Issue #1491431: Fixed distutils.filelist.glob_to_re for edge cases.
  Initial fix by Wayne Davison.

4441
- Issue #5694: removed spurious test output in Distutils (test_clean).
4442

4443
- Issue #1326077: fix the formatting of SyntaxErrors by the traceback module.
4444

4445 4446 4447 4448
- 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.

4449 4450 4451 4452
- 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.

4453 4454 4455
- Issue #5583: Added optional Extensions in Distutils. Initial patch by Georg
  Brandl.

4456 4457 4458
- Issue #1222: locale.format() bug when the thousands separator is a space
  character.

4459 4460 4461
- Issue #5472: Fixed distutils.test_util tear down. Original patch by
  Tim Golden.

4462 4463
- collections.deque() objects now have a read-only attribute called maxlen.

4464 4465 4466 4467
- 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.

4468 4469 4470 4471 4472 4473
- 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.

4474 4475 4476
- Issue #5394: removed > 2.3 syntax from distutils.msvc9compiler.
  Original patch by Akira Kitada.

4477 4478
- Issue #5334: array.fromfile() failed to insert values when EOFError was raised.

4479 4480
- Issue #5385: Fixed mmap crash after resize failure on windows.

4481 4482
- Issue #5179: Fixed subprocess handle leak on failure on windows.

Raymond Hettinger's avatar
Raymond Hettinger committed
4483 4484
- PEP 372:  Added collections.OrderedDict().

4485 4486
- The _asdict() for method for namedtuples now returns an OrderedDict().

4487 4488
- configparser now defaults to using an ordered dictionary.

Benjamin Peterson's avatar
Benjamin Peterson committed
4489 4490 4491
- Issue #5401: Fixed a performance problem in mimetypes when ``from mimetypes
  import guess_extension`` was used.

4492 4493 4494
- Issue #1733986: Fixed mmap crash in accessing elements of second map object
  with same tagname but larger size than first map. (Windows)

4495 4496 4497
- Issue #5386: mmap.write_byte didn't check map size, so it could cause buffer
  overrun.

4498
- Issue #1533164: Installed but not listed ``*.pyo`` was breaking Distutils
4499 4500 4501 4502
  bdist_rpm command.

- Issue #5378: added --quiet option to Distutils bdist_rpm command.

4503 4504
- Issue #5052: make Distutils compatible with 2.3 again.

4505 4506
- Issue #5316: Fixed buildbot failures introduced by multiple inheritance
  in Distutils tests.
Barry Warsaw's avatar
Barry Warsaw committed
4507

4508 4509 4510
- Issue #5287: Add exception handling around findCaller() call to help out
  IronPython.

4511 4512 4513 4514 4515
- 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)].

4516
- Issue #2279: distutils.sdist.add_defaults now add files
4517 4518
  from the package_data and the data_files metadata.

4519
- Issue #5257: refactored all tests in distutils, so they use
4520 4521
  support.TempdirManager, to avoid writing in the tests directory.

4522 4523 4524
- Issue #4524: distutils build_script command failed with --with-suffix=3.
  Initial patch by Amaury Forgeot d'Arc.

4525 4526
- Issue #2461: added tests for distutils.util

4527 4528 4529 4530
- 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.

4531 4532 4533
- Issue #4631: Fix urlopen() result when an HTTP response uses chunked
  encoding.

4534 4535 4536
- Issue #5203: Fixed ctypes segfaults when passing a unicode string to a
  function without argtypes (only occurs if HAVE_USABLE_WCHAR_T is false).

4537 4538 4539
- Issue #3386: distutils.sysconfig.get_python_lib prefix argument was ignored
  under NT and OS2. Patch by Philip Jenvey.

4540 4541 4542 4543
- 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.

4544 4545 4546
- Issue #5122: Synchronize tk load failure check to prevent a potential
  deadlock.

4547 4548 4549 4550
- 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, ...

4551 4552
- Issue #4890: Handle empty text search pattern in Tkinter.Text.search.

4553 4554 4555
- Issue #4512 (part 2): Promote ``ZipImporter._get_filename()`` to be a
  public documented method ``ZipImporter.get_filename()``.

4556 4557 4558 4559 4560
- 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.

4561 4562 4563 4564 4565
- 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.

4566 4567 4568
- Issue #4285: Change sys.version_info to be a named tuple. Patch by
  Ross Light.

4569
- Issue #1520877: Now distutils.sysconfig reads $AR from the
4570 4571
  environment/Makefile. Patch by Douglas Greiman.

4572 4573 4574
- Issue #1276768: The verbose option was not used in the code of
  distutils.file_util and distutils.dir_util.

4575
- Issue #5132: Fixed trouble building extensions under Solaris with
4576 4577
  --enabled-shared activated. Initial patch by Dave Peterson.

4578 4579
- Issue #1581476: Always use the Tcl global namespace when calling into Tcl.

4580 4581
- The shelve module now defaults to pickle protocol 3.

4582 4583 4584
- Fix a bug in the trace module where a bytes object from co_lnotab had its
  items being passed through ord().

4585 4586 4587 4588
- 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").

4589 4590
- Added the ttk module. See issue #2983: Ttk support for Tkinter.

4591 4592 4593 4594
- Removed isSequenceType(), isMappingType, and isNumberType() from the
  operator module; use the abstract base classes instead.  Also removed
  the repeat() function; use mul() instead.

4595
- Issue #5021:  doctest.testfile() did not create __name__ and
4596 4597 4598 4599 4600
  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.

4601 4602 4603
- Issue #1885: distutils. When running sdist with --formats=tar,gztar
  the tar file was overriden by the gztar one.

4604 4605
- Issue #4863: distutils.mwerkscompiler has been removed.

4606 4607
- Added a new itertools functions:  combinations_with_replacement()
  and compress().
4608

4609
- Issue #5032:  added a step argument to itertools.count() and
4610 4611
  allowed non-integer arguments.

Jesse Noller's avatar
Jesse Noller committed
4612 4613 4614 4615
- Fix and properly document the multiprocessing module's logging
  support, expose the internal levels and provide proper usage
  examples.

4616 4617 4618
- Issue #1672332: fix unpickling of subnormal floats, which was
  producing a ValueError on some platforms.

4619 4620 4621
- Issue #3881: Help Tcl to load even when started through the
  unreadable local symlink to "Program Files" on Vista.

4622 4623 4624
- Issue #4710: Extract directories properly in the zipfile module;
  allow adding directories to a zipfile.

4625
- Issue #3807: _multiprocessing build fails when configure is passed
Jesse Noller's avatar
Jesse Noller committed
4626 4627 4628
  --without-threads argument. When this occurs, _multiprocessing will
  be disabled, and not compiled.

4629 4630 4631 4632 4633
- 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.

4634 4635 4636
- Issue #5013: Fixed a bug in FileHandler which occurred when the delay
  parameter was set.

4637 4638 4639
- Issue #4842: Always append a trailing 'L' when pickling longs using
  pickle protocol 0.  When reading, the 'L' is optional.

4640 4641
- Add the importlib package.

Jesse Noller's avatar
Jesse Noller committed
4642 4643 4644
- Issue #4301: Patch the logging module to add processName support, remove
  _check_logger_class from multiprocessing.

4645
- Issue #3325: Remove python2.x try: except: imports for old cPickle from
4646
  multiprocessing.
4647

4648 4649 4650
- Issue #4959: inspect.formatargspec now works for keyword only arguments
  without defaults.

4651 4652
- Issue #3321: ``_multiprocessing.Connection()`` doesn't check handle; added checks
  for Unix machines for negative handles and large int handles. Without this check
Jesse Noller's avatar
Jesse Noller committed
4653 4654
  it is possible to segfault the interpreter.

4655 4656 4657 4658 4659 4660
- 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__.

4661 4662 4663 4664
- 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.

4665 4666 4667
- Issue #1696199:  Add collections.Counter() for rapid and convenient
  counting.

4668 4669
- Issue #3860: GzipFile and BZ2File now support the context manager protocol.

4670 4671 4672
- Issue #4867: Fixed a crash in ctypes when passing a string to a
  function without defining argtypes.

4673 4674 4675 4676 4677
- 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.

4678 4679
- Restore Python 2.3 compatibility for decimal.py.

4680 4681 4682
- Issue #3638: Remove functions from _tkinter module level that depend on
  TkappObject to work with multiple threads.

4683 4684
- Issue #4718: Adapt the wsgiref package so that it actually works with
  Python 3.x, in accordance with the `official amendments of the spec
4685 4686
  <http://www.wsgi.org/wsgi/Amendments_1.0>`_.

4687 4688 4689
- Issue #4796: Added Decimal.from_float() and Context.create_decimal_from_float()
  to the decimal module.

4690 4691 4692
- Fractions.from_float() no longer loses precision for integers too big to
  cast as floats.

4693 4694 4695
- Issue #4812: add missing underscore prefix to some internal-use-only
  constants in the decimal module.  (Dec_0 becomes _Dec_0, etc.)

4696
- Issue #4790: The nsmallest() and nlargest() functions in the heapq module
4697 4698
  did unnecessary work in the common case where no key function was specified.

4699 4700 4701
- Issue #4795: inspect.isgeneratorfunction() returns False instead of None when
  the function is not a generator.

4702 4703
- Issue #4702: Throwing a DistutilsPlatformError instead of IOError in case
  no MSVC compiler is found under Windows. Original patch by Philip Jenvey.
4704

4705
- Issue #4646: distutils was choking on empty options arg in the setup
4706 4707
  function. Original patch by Thomas Heller.

4708 4709
- Issue #3767: Convert Tk object to string in tkColorChooser.

4710 4711
- Issue #3248: Allow placing ScrolledText in a PanedWindow.

4712 4713 4714
- Issue #4444: Allow assertRaises() to be used as a context handler, so that
  the code under test can be written inline if more practical.

4715 4716 4717
- Issue #4739: Add pydoc help topics for symbols, so that e.g. help('@')
  works as expected in the interactive environment.

4718 4719 4720
- Issue #4756: zipfile.is_zipfile() now supports file-like objects. Patch by
  Gabriel Genellina.

4721 4722 4723
- Issue #4574: reading an UTF16-encoded text file crashes if \r on 64-char
  boundary.

4724 4725 4726 4727 4728 4729 4730 4731 4732 4733 4734 4735 4736 4737 4738 4739 4740 4741 4742
- 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.

4743 4744 4745
- Issue #4163: textwrap module: allow word splitting on a hyphen preceded by
  a non-ASCII letter.

4746 4747
- Issue #4616: TarFile.utime(): Restore directory times on Windows.

4748 4749 4750
- Issue #4021: tokenize.detect_encoding() now raises a SyntaxError when the
  codec cannot be found.  This is for compatibility with the builtin behavior.

4751 4752 4753 4754
- 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.

4755 4756 4757
- Issue #4483: _dbm module now builds on systems with gdbm & gdbm_compat
  libs.

4758 4759 4760 4761 4762 4763 4764 4765 4766 4767 4768 4769 4770 4771 4772 4773
- 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.

4774 4775 4776 4777 4778 4779 4780 4781 4782
- 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.

4783 4784 4785
- Issue #4542: On Windows, binascii.crc32 still accepted str as binary input;
  the corresponding tests now pass.

4786 4787 4788
- Issue #4537: webbrowser.UnixBrowser would fail to open the browser because
  it was calling the wrong open() function.

4789 4790 4791 4792
- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
  support unusual filenames (such as those containing semi-colons) in
  Content-Disposition headers.

4793 4794 4795
- Issue #4861: ctypes.util.find_library(): Robustify. Fix library detection on
  biarch systems. Try to rely on ldconfig only, without using objdump and gcc.

Benjamin Peterson's avatar
Benjamin Peterson committed
4796 4797 4798 4799
- 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().

4800 4801
- Windows locale mapping updated to Vista.

4802 4803 4804
Tools/Demos
-----------

4805 4806 4807
- Issue #4704: remove use of cmp() in pybench, bump its version number to 2.1,
  and make it 2.6-compatible.

4808 4809
- Ttk demos added in Demo/tkinter/ttk/

4810 4811
- Issue #4677: add two list comprehension tests to pybench.

4812 4813 4814 4815

Build
-----

4816 4817
- Issue #6094: Build correctly with Subversion 1.7.

4818 4819
- Issue #5847: Remove -n switch on "Edit with IDLE" menu item.

4820 4821 4822
- Issue #5726: Make Modules/ld_so_aix return the actual exit code of the
  linker, rather than always exit successfully. Patch by Floris Bruynooghe.

4823
- Issue #4587: Add configure option --with-dbmliborder=db1:db2:... to specify
4824
  the order that backends for the dbm extension are checked.
4825

4826 4827
- Link the shared python library with $(MODLIBS).

4828 4829
- Issue #5134: Silence compiler warnings when compiling sqlite with VC++.

4830 4831
- Issue #4494: Fix build with Py_NO_ENABLE_SHARED on Windows.

4832 4833
- Issue #4895: Use _strdup on Windows CE.

4834 4835 4836 4837 4838 4839 4840 4841 4842 4843 4844 4845 4846 4847 4848 4849 4850 4851 4852 4853 4854 4855 4856 4857
- 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
-----

4858 4859 4860
- Issue #6624: yArg_ParseTuple with "s" format when parsing argument with
  NUL: Bogus TypeError detail string.

4861 4862 4863
- Issue #5175: PyLong_AsUnsignedLongLong now raises OverflowError
  for negative arguments.  Previously, it raised TypeError.

4864 4865 4866 4867 4868 4869 4870 4871 4872
- 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.


4873 4874 4875
Extension Modules
-----------------

4876 4877 4878 4879
- 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).

4880 4881
- Issue #4397: Fix occasional test_socket failure on OS X.

4882 4883
- Issue #4279: Fix build of parsermodule under Cygwin.

4884 4885 4886 4887
- 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.

4888 4889
- Issue #4051: Prevent conflict of UNICODE macros in cPickle.

4890 4891 4892 4893
- 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.

4894 4895
- Issue #4228: Pack negative values the same way as 2.4 in struct's L format.

4896 4897
- Issue #1040026: Fix os.times result on systems where HZ is incorrect.

4898 4899
- Issues #3167, #3682: Fix test_math failures for log, log10 on Solaris,
  OpenBSD.
4900

4901 4902 4903 4904
- Issue #4583: array.array would not always prohibit resizing when a buffer
  has been exported, resulting in an interpreter crash when accessing the
  buffer.

4905

4906 4907
- Issue #5228: Make functools.partial objects can now be pickled.

4908 4909 4910
Tests
-----

4911 4912 4913
- Issue #6152: New option '-j'/'--multiprocess' for regrtest allows running
  regression tests in parallel, shortening the total runtime.

4914 4915 4916 4917 4918
- 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.

4919
- regrtest no longer treats ImportError as equivalent to SkipTest.  Imports
4920
  that should cause a test to be skipped are now done using import_module
4921 4922
  from test support, which does the conversion.

4923 4924 4925
- Issue #5083: New 'gui' resource for regrtest.


4926 4927 4928
Docs
----

4929

4930
**(For information about older versions, consult the HISTORY file.)**