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Python News
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What's New in Python 3.5.2 release candidate 1?
===============================================

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Release date: tba
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Core and Builtins
-----------------

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- Issue #25731: Fix set and deleting __new__ on a class.

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- Issue #22995: [UPDATE] Comment out the one of the pickleability tests in
  _PyObject_GetState() due to regressions observed in Cython-based projects.

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- Issue #25961: Disallowed null characters in the type name.

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- Issue #25973: Fix segfault when an invalid nonlocal statement binds a name
  starting with two underscores.

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- Issue #22995: Instances of extension types with a state that aren't
  subclasses of list or dict and haven't implemented any pickle-related
  methods (__reduce__, __reduce_ex__, __getnewargs__, __getnewargs_ex__,
  or __getstate__), can no longer be pickled.  Including memoryview.

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- Issue #20440: Massive replacing unsafe attribute setting code with special
  macro Py_SETREF.

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- Issue #25766: Special method __bytes__() now works in str subclasses.

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- Issue #25421: __sizeof__ methods of builtin types now use dynamic basic size.
  This allows sys.getsize() to work correctly with their subclasses with
  __slots__ defined.

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- Issue #25709: Fixed problem with in-place string concatenation and utf-8 cache.

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- Issue #24097: Fixed crash in object.__reduce__() if slot name is freed inside
  __getattr__.

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- Issue #24731: Fixed crash on converting objects with special methods
  __bytes__, __trunc__, and __float__ returning instances of subclasses of
  bytes, int, and float to subclasses of bytes, int, and float correspondingly.

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Library
-------

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- Issue #26013: Added compatibility with broken protocol 2 pickles created
  in old Python 3 versions (3.4.3 and lower).

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- Issue #25850: Use cross-compilation by default for 64-bit Windows.

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- Issue #17633: Improve zipimport's support for namespace packages.

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- Issue #24705: Fix sysconfig._parse_makefile not expanding ${} vars
  appearing before $() vars.

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- Issue #22138: Fix mock.patch behavior when patching descriptors. Restore
  original values after patching. Patch contributed by Sean McCully.

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- Issue #25672: In the ssl module, enable the SSL_MODE_RELEASE_BUFFERS mode
  option if it is safe to do so.

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- Issue #22570: Add 'path' attribute to pathlib.Path objects,
  returning the same as str(), to make it more similar to DirEntry.
  Library code can now write getattr(p, 'path', p) to get the path as
  a string from a Path, a DirEntry, or a plain string.  This is
  essentially a small one-off protocol.

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- Issue #26012: Don't traverse into symlinks for ** pattern in
  pathlib.Path.[r]glob().

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- Issue #24120: Ignore PermissionError when traversing a tree with
  pathlib.Path.[r]glob().  Patch by Ulrich Petri.

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- Issue #25447: fileinput now uses sys.stdin as-is if it does not have a
  buffer attribute (restores backward compatibility).

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- Issue #25447: Copying the lru_cache() wrapper object now always works,
  independedly from the type of the wrapped object (by returning the original
  object unchanged).

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- Issue #24103: Fixed possible use after free in ElementTree.XMLPullParser.

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- Issue #25860: os.fwalk() no longer skips remaining directories when error
  occurs.  Original patch by Samson Lee.

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- Issue #25914: Fixed and simplified OrderedDict.__sizeof__.

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- Issue #25902: Fixed various refcount issues in ElementTree iteration.

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- Issue #25717: Restore the previous behaviour of tolerating most fstat()
  errors when opening files.  This was a regression in 3.5a1, and stopped
  anonymous temporary files from working in special cases.

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- Issue #24903: Fix regression in number of arguments compileall accepts when
  '-d' is specified.  The check on the number of arguments has been dropped
  completely as it never worked correctly anyway.
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- Issue #25764: In the subprocess module, preserve any exception caused by
  fork() failure when preexec_fn is used.
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- Issue #6478: _strptime's regexp cache now is reset after changing timezone
  with time.tzset().
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- Issue #14285: When executing a package with the "python -m package" option,
  and package initialization fails, a proper traceback is now reported.  The
  "runpy" module now lets exceptions from package initialization pass back to
  the caller, rather than raising ImportError.

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- Issue #19771: Also in runpy and the "-m" option, omit the irrelevant
  message ". . . is a package and cannot be directly executed" if the package
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  could not even be initialized (e.g. due to a bad ``*.pyc`` file).
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- Issue #25177: Fixed problem with the mean of very small and very large
  numbers. As a side effect, statistics.mean and statistics.variance should
  be significantly faster.

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- Issue #25718: Fixed copying object with state with boolean value is false.
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- Issue #10131: Fixed deep copying of minidom documents.  Based on patch
  by Marian Ganisin.
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- Issue #25725: Fixed a reference leak in pickle.loads() when unpickling
  invalid data including tuple instructions.
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- Issue #25663: In the Readline completer, avoid listing duplicate global
  names, and search the global namespace before searching builtins.
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- Issue #25688: Fixed file leak in ElementTree.iterparse() raising an error.
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- Issue #23914: Fixed SystemError raised by unpickler on broken pickle data.
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- Issue #25691: Fixed crash on deleting ElementTree.Element attributes.

- Issue #25624: ZipFile now always writes a ZIP_STORED header for directory
  entries.  Patch by Dingyuan Wang.

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- Skip getaddrinfo if host is already resolved.
  Patch by A. Jesse Jiryu Davis.

- Add asyncio.timeout() context manager.

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- Issue #26050: Add asyncio.StreamReader.readuntil() method.
  Patch by Марк Коренберг.
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Documentation
-------------

- Issue #25500: Fix documentation to not claim that __import__ is searched for
  in the global scope.

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Tests
-----
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- Issue #25940: Changed test_ssl to use self-signed.pythontest.net.  This
  avoids relying on svn.python.org, which recently changed root certificate.
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- Issue #25616: Tests for OrderedDict are extracted from test_collections
  into separate file test_ordered_dict.
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Build
-----
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- Issue #25348: Added ``--pgo`` and ``--pgo-job`` arguments to
  ``PCbuild\build.bat`` for building with Profile-Guided Optimization.  The
  old ``PCbuild\build_pgo.bat`` script is now deprecated, and simply calls
  ``PCbuild\build.bat --pgo %*``.

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- Issue #25827: Add support for building with ICC to ``configure``, including
  a new ``--with-icc`` flag.

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- Issue #25696: Fix installation of Python on UNIX with make -j9.

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- Issue #25798: Update OS X 10.5 installer to use OpenSSL 1.0.2e.
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Windows
-------

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- Issue #26071: bdist_wininst created binaries fail to start and find
  32bit Python

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- Issue #26073: Update the list of magic numbers in launcher

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- Issue #26065: Excludes venv from library when generating embeddable
  distro.
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What's New in Python 3.5.1 final?
=================================

Release date: 2015-12-06

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

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- Issue #25709: Fixed problem with in-place string concatenation and
  utf-8 cache.
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Windows
-------

- Issue #25715: Python 3.5.1 installer shows wrong upgrade path and incorrect
  logic for launcher detection.
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What's New in Python 3.5.1 release candidate 1?
===============================================
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Release date: 2015-11-22
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Core and Builtins
-----------------

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- Issue #25630: Fix a possible segfault during argument parsing in functions
  that accept filesystem paths.

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- Issue #23564: Fixed a partially broken sanity check in the _posixsubprocess
  internals regarding how fds_to_pass were passed to the child.  The bug had
  no actual impact as subprocess.py already avoided it.

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- Issue #25388: Fixed tokenizer crash when processing undecodable source code
  with a null byte.

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- Issue #25462: The hash of the key now is calculated only once in most
  operations in C implementation of OrderedDict.

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- Issue #22995: Default implementation of __reduce__ and __reduce_ex__ now
  rejects builtin types with not defined __new__.

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- Issue #25555: Fix parser and AST: fill lineno and col_offset of "arg" node
  when compiling AST from Python objects.

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- Issue #24802: Avoid buffer overreads when int(), float(), compile(), exec()
  and eval() are passed bytes-like objects.  These objects are not
  necessarily terminated by a null byte, but the functions assumed they were.

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- Issue #24726: Fixed a crash and leaking NULL in repr() of OrderedDict that
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  was mutated by direct calls of dict methods.

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- Issue #25449: Iterating OrderedDict with keys with unstable hash now raises
  KeyError in C implementations as well as in Python implementation.

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- Issue #25395: Fixed crash when highly nested OrderedDict structures were
  garbage collected.

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- Issue #25274: sys.setrecursionlimit() now raises a RecursionError if the new
  recursion limit is too low depending at the current recursion depth. Modify
  also the "lower-water mark" formula to make it monotonic. This mark is used
  to decide when the overflowed flag of the thread state is reset.

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- Issue #24402: Fix input() to prompt to the redirected stdout when
  sys.stdout.fileno() fails.

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- Issue #24806: Prevent builtin types that are not allowed to be subclassed from
  being subclassed through multiple inheritance.

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- Issue #24848: Fixed a number of bugs in UTF-7 decoding of misformed data.

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- Issue #25280: Import trace messages emitted in verbose (-v) mode are no
  longer formatted twice.

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- Issue #25003: On Solaris 11.3 or newer, os.urandom() now uses the
  getrandom() function instead of the getentropy() function. The getentropy()
  function is blocking to generate very good quality entropy, os.urandom()
  doesn't need such high-quality entropy.

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- Issue #25182: The stdprinter (used as sys.stderr before the io module is
  imported at startup) now uses the backslashreplace error handler.

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- Issue #25131: Make the line number and column offset of set/dict literals and
  comprehensions correspond to the opening brace.

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- Issue #25150: Hide the private _Py_atomic_xxx symbols from the public
  Python.h header to fix a compilation error with OpenMP. PyThreadState_GET()
  becomes an alias to PyThreadState_Get() to avoid ABI incompatibilies.

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Library
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- Issue #25626: Change three zlib functions to accept sizes that fit in
  Py_ssize_t, but internally cap those sizes to UINT_MAX.  This resolves a
  regression in 3.5 where GzipFile.read() failed to read chunks larger than 2
  or 4 GiB.  The change affects the zlib.Decompress.decompress() max_length
  parameter, the zlib.decompress() bufsize parameter, and the
  zlib.Decompress.flush() length parameter.

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- Issue #25583: Avoid incorrect errors raised by os.makedirs(exist_ok=True)
  when the OS gives priority to errors such as EACCES over EEXIST.

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- Issue #25593: Change semantics of EventLoop.stop() in asyncio.

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- Issue #6973: When we know a subprocess.Popen process has died, do
  not allow the send_signal(), terminate(), or kill() methods to do
  anything as they could potentially signal a different process.

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- Issue #25590: In the Readline completer, only call getattr() once per
  attribute.

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- Issue #25498: Fix a crash when garbage-collecting ctypes objects created
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  by wrapping a memoryview.  This was a regression made in 3.5a1.  Based
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  on patch by Eryksun.

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- Issue #25584: Added "escape" to the __all__ list in the glob module.

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- Issue #25584: Fixed recursive glob() with patterns starting with '\*\*'.

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- Issue #25446: Fix regression in smtplib's AUTH LOGIN support.

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- Issue #18010: Fix the pydoc web server's module search function to handle
  exceptions from importing packages.

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- Issue #25554: Got rid of circular references in regular expression parsing.

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- Issue #25510: fileinput.FileInput.readline() now returns b'' instead of ''
  at the end if the FileInput was opened with binary mode.
  Patch by Ryosuke Ito.

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- Issue #25503: Fixed inspect.getdoc() for inherited docstrings of properties.
  Original patch by John Mark Vandenberg.

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- Issue #25515: Always use os.urandom as a source of randomness in uuid.uuid4.

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- Issue #21827: Fixed textwrap.dedent() for the case when largest common
  whitespace is a substring of smallest leading whitespace.
  Based on patch by Robert Li.

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- Issue #25447: The lru_cache() wrapper objects now can be copied and pickled
  (by returning the original object unchanged).

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- Issue #25390: typing: Don't crash on Union[str, Pattern].

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- Issue #25441: asyncio: Raise error from drain() when socket is closed.
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- Issue #25410: Cleaned up and fixed minor bugs in C implementation of
  OrderedDict.

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- Issue #25411: Improved Unicode support in SMTPHandler through better use of
  the email package. Thanks to user simon04 for the patch.
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- Issue #25407: Remove mentions of the formatter module being removed in
  Python 3.6.

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- Issue #25406: Fixed a bug in C implementation of OrderedDict.move_to_end()
  that caused segmentation fault or hang in iterating after moving several
  items to the start of ordered dict.

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- Issue #25364: zipfile now works in threads disabled builds.

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- Issue #25328: smtpd's SMTPChannel now correctly raises a ValueError if both
  decode_data and enable_SMTPUTF8 are set to true.

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- Issue #25316: distutils raises OSError instead of DistutilsPlatformError
  when MSVC is not installed.

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- Issue #25380: Fixed protocol for the STACK_GLOBAL opcode in
  pickletools.opcodes.

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- Issue #23972: Updates asyncio datagram create method allowing reuseport
  and reuseaddr socket options to be set prior to binding the socket.
  Mirroring the existing asyncio create_server method the reuseaddr option
  for datagram sockets defaults to True if the O/S is 'posix' (except if the
  platform is Cygwin). Patch by Chris Laws.

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- Issue #25304: Add asyncio.run_coroutine_threadsafe().  This lets you
  submit a coroutine to a loop from another thread, returning a
  concurrent.futures.Future.  By Vincent Michel.

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- Issue #25232: Fix CGIRequestHandler to split the query from the URL at the
  first question mark (?) rather than the last. Patch from Xiang Zhang.

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- Issue #24657: Prevent CGIRequestHandler from collapsing slashes in the
  query part of the URL as if it were a path. Patch from Xiang Zhang.

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- Issue #24483: C implementation of functools.lru_cache() now calculates key's
  hash only once.

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- Issue #22958: Constructor and update method of weakref.WeakValueDictionary
  now accept the self and the dict keyword arguments.

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- Issue #22609: Constructor of collections.UserDict now accepts the self keyword
  argument.

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- Issue #25111: Fixed comparison of traceback.FrameSummary.

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- Issue #25262. Added support for BINBYTES8 opcode in Python implementation of
  unpickler.  Highest 32 bits of 64-bit size for BINUNICODE8 and BINBYTES8
  opcodes no longer silently ignored on 32-bit platforms in C implementation.

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- Issue #25034: Fix string.Formatter problem with auto-numbering and
  nested format_specs. Patch by Anthon van der Neut.

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- Issue #25233: Rewrite the guts of asyncio.Queue and
  asyncio.Semaphore to be more understandable and correct.
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- Issue #25203: Failed readline.set_completer_delims() no longer left the
  module in inconsistent state.

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- Issue #23600: Default implementation of tzinfo.fromutc() was returning
  wrong results in some cases.

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- Issue #23329: Allow the ssl module to be built with older versions of
  LibreSSL.

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- Prevent overflow in _Unpickler_Read.

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- Issue #25047: The XML encoding declaration written by Element Tree now
  respects the letter case given by the user. This restores the ability to
  write encoding names in uppercase like "UTF-8", which worked in Python 2.

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- Issue #25135: Make deque_clear() safer by emptying the deque before clearing.
  This helps avoid possible reentrancy issues.

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- Issue #19143: platform module now reads Windows version from kernel32.dll to
  avoid compatibility shims.

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- Issue #25092: Fix datetime.strftime() failure when errno was already set to
  EINVAL.

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- Issue #23517: Fix rounding in fromtimestamp() and utcfromtimestamp() methods
  of datetime.datetime: microseconds are now rounded to nearest with ties
  going to nearest even integer (ROUND_HALF_EVEN), instead of being rounding
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  towards minus infinity (ROUND_FLOOR). It's important that these methods use
  the same rounding mode than datetime.timedelta to keep the property:
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  (datetime(1970,1,1) + timedelta(seconds=t)) == datetime.utcfromtimestamp(t).
  It also the rounding mode used by round(float) for example.

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- Issue #25155: Fix datetime.datetime.now() and datetime.datetime.utcnow() on
  Windows to support date after year 2038. It was a regression introduced in
  Python 3.5.0.

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- Issue #25108: Omitted internal frames in traceback functions print_stack(),
  format_stack(), and extract_stack() called without arguments.

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- Issue #25118: Fix a regression of Python 3.5.0 in os.waitpid() on Windows.

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- Issue #24684: socket.socket.getaddrinfo() now calls
  PyUnicode_AsEncodedString() instead of calling the encode() method of the
  host, to handle correctly custom string with an encode() method which doesn't
  return a byte string. The encoder of the IDNA codec is now called directly
  instead of calling the encode() method of the string.

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- Issue #25060: Correctly compute stack usage of the BUILD_MAP opcode.

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- Issue #24857: Comparing call_args to a long sequence now correctly returns a
  boolean result instead of raising an exception.  Patch by A Kaptur.

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- Issue #23144: Make sure that HTMLParser.feed() returns all the data, even
  when convert_charrefs is True.

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- Issue #24982: shutil.make_archive() with the "zip" format now adds entries
  for directories (including empty directories) in ZIP file.

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- Issue #25019: Fixed a crash caused by setting non-string key of expat parser.
  Based on patch by John Leitch.

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- Issue #16180: Exit pdb if file has syntax error, instead of trapping user
  in an infinite loop.  Patch by Xavier de Gaye.

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- Issue #24891: Fix a race condition at Python startup if the file descriptor
  of stdin (0), stdout (1) or stderr (2) is closed while Python is creating
  sys.stdin, sys.stdout and sys.stderr objects. These attributes are now set
  to None if the creation of the object failed, instead of raising an OSError
  exception. Initial patch written by Marco Paolini.

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- Issue #24992: Fix error handling and a race condition (related to garbage
  collection) in collections.OrderedDict constructor.

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- Issue #24881: Fixed setting binary mode in Python implementation of FileIO
  on Windows and Cygwin.  Patch from Akira Li.

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- Issue #25578: Fix (another) memory leak in SSLSocket.getpeercer().

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- Issue #25530: Disable the vulnerable SSLv3 protocol by default when creating
  ssl.SSLContext.

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- Issue #25569: Fix memory leak in SSLSocket.getpeercert().

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- Issue #25471: Sockets returned from accept() shouldn't appear to be
  nonblocking.

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- Issue #25319: When threading.Event is reinitialized, the underlying condition
  should use a regular lock rather than a recursive lock.

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- Issue #21112: Fix regression in unittest.expectedFailure on subclasses.
  Patch from Berker Peksag.
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- Issue #24764: cgi.FieldStorage.read_multi() now ignores the Content-Length
  header in part headers. Patch written by Peter Landry and reviewed by Pierre
  Quentel.

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- Issue #24913: Fix overrun error in deque.index().
  Found by John Leitch and Bryce Darling.

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- Issue #24774: Fix docstring in http.server.test. Patch from Chiu-Hsiang Hsu.

- Issue #21159: Improve message in configparser.InterpolationMissingOptionError.
  Patch from Łukasz Langa.

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- Issue #20362: Honour TestCase.longMessage correctly in assertRegex.
  Patch from Ilia Kurenkov.

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- Issue #23572: Fixed functools.singledispatch on classes with falsy
  metaclasses.  Patch by Ethan Furman.

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- asyncio: ensure_future() now accepts awaitable objects.
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IDLE
----
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- Issue 15348: Stop the debugger engine (normally in a user process)
  before closing the debugger window (running in the IDLE process).
  This prevents the RuntimeErrors that were being caught and ignored.
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- Issue #24455: Prevent IDLE from hanging when a) closing the shell while the
  debugger is active (15347); b) closing the debugger with the [X] button
  (15348); and c) activating the debugger when already active (24455).
  The patch by Mark Roseman does this by making two changes.
  1. Suspend and resume the gui.interaction method with the tcl vwait
  mechanism intended for this purpose (instead of root.mainloop & .quit).
  2. In gui.run, allow any existing interaction to terminate first.
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- Change 'The program' to 'Your program' in an IDLE 'kill program?' message
  to make it clearer that the program referred to is the currently running
  user program, not IDLE itself.
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- Issue #24750: Improve the appearance of the IDLE editor window status bar.
  Patch by Mark Roseman.
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- Issue #25313: Change the handling of new built-in text color themes to better
  address the compatibility problem introduced by the addition of IDLE Dark.
  Consistently use the revised idleConf.CurrentTheme everywhere in idlelib.
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- Issue #24782: Extension configuration is now a tab in the IDLE Preferences
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  dialog rather than a separate dialog.  The former tabs are now a sorted
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  list.  Patch by Mark Roseman.
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- Issue #22726: Re-activate the config dialog help button with some content
  about the other buttons and the new IDLE Dark theme.
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- Issue #24820: IDLE now has an 'IDLE Dark' built-in text color theme.
  It is more or less IDLE Classic inverted, with a cobalt blue background.
  Strings, comments, keywords, ... are still green, red, orange, ... .
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  To use it with IDLEs released before November 2015, hit the
  'Save as New Custom Theme' button and enter a new name,
  such as 'Custom Dark'.  The custom theme will work with any IDLE
  release, and can be modified.
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- Issue #25224: README.txt is now an idlelib index for IDLE developers and
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  curious users.  The previous user content is now in the IDLE doc chapter.
  'IDLE' now means 'Integrated Development and Learning Environment'.
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- Issue #24820: Users can now set breakpoint colors in
  Settings -> Custom Highlighting.  Original patch by Mark Roseman.
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- Issue #24972: Inactive selection background now matches active selection
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  background, as configured by users, on all systems.  Found items are now
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  always highlighted on Windows.  Initial patch by Mark Roseman.
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- Issue #24570: Idle: make calltip and completion boxes appear on Macs
  affected by a tk regression.  Initial patch by Mark Roseman.
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- Issue #24988: Idle ScrolledList context menus (used in debugger)
  now work on Mac Aqua.  Patch by Mark Roseman.
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- Issue #24801: Make right-click for context menu work on Mac Aqua.
  Patch by Mark Roseman.
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- Issue #25173: Associate tkinter messageboxes with a specific widget.
  For Mac OSX, make them a 'sheet'.  Patch by Mark Roseman.
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- Issue #25198: Enhance the initial html viewer now used for Idle Help.
  * Properly indent fixed-pitch text (patch by Mark Roseman).
  * Give code snippet a very Sphinx-like light blueish-gray background.
  * Re-use initial width and height set by users for shell and editor.
  * When the Table of Contents (TOC) menu is used, put the section header
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  at the top of the screen.
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- Issue #25225: Condense and rewrite Idle doc section on text colors.
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- Issue #21995: Explain some differences between IDLE and console Python.
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- Issue #22820: Explain need for *print* when running file from Idle editor.
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- Issue #25224: Doc: augment Idle feature list and no-subprocess section.
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- Issue #25219: Update doc for Idle command line options.
  Some were missing and notes were not correct.
589

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Terry Jan Reedy committed
590
- Issue #24861: Most of idlelib is private and subject to change.
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591
  Use idleib.idle.* to start Idle. See idlelib.__init__.__doc__.
592

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Terry Jan Reedy committed
593
- Issue #25199: Idle: add synchronization comments for future maintainers.
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- Issue #16893: Replace help.txt with help.html for Idle doc display.
  The new idlelib/help.html is rstripped Doc/build/html/library/idle.html.
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Terry Jan Reedy committed
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  It looks better than help.txt and will better document Idle as released.
Terry Jan Reedy's avatar
Terry Jan Reedy committed
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  The tkinter html viewer that works for this file was written by Mark Roseman.
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  The now unused EditorWindow.HelpDialog class and helt.txt file are deprecated.
600

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Terry Jan Reedy committed
601
- Issue #24199: Deprecate unused idlelib.idlever with possible removal in 3.6.
602

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Terry Jan Reedy committed
603
- Issue #24790: Remove extraneous code (which also create 2 & 3 conflicts).
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Documentation
-------------

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- Issue #12067: Rewrite Comparisons section in the Expressions chapter of the
  language reference. Some of the details of comparing mixed types were
  incorrect or ambiguous. NotImplemented is only relevant at a lower level
  than the Expressions chapter. Added details of comparing range() objects,
  and default behaviour and consistency suggestions for user-defined classes.
  Patch from Andy Maier.
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- Issue #24952: Clarify the default size argument of stack_size() in
  the "threading" and "_thread" modules. Patch from Mattip.
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- Issue #23725: Overhaul tempfile docs. Note deprecated status of mktemp.
  Patch from Zbigniew Jędrzejewski-Szmek.

621 622
- Issue #24808: Update the types of some PyTypeObject fields.  Patch by
  Joseph Weston.
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624 625
- Issue #22812: Fix unittest discovery examples.
  Patch from Pam McA'Nulty.
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Tests
-----

630 631
- Issue #25449: Added tests for OrderedDict subclasses.

632
- Issue #25099: Make test_compileall not fail when an entry on sys.path cannot
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  be written to (commonly seen in administrative installs on Windows).

635 636
- Issue #23919: Prevents assert dialogs appearing in the test suite.

637
- ``PCbuild\rt.bat`` now accepts an unlimited number of arguments to pass along
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  to regrtest.py.  Previously there was a limit of 9.

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Build
-----

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- Issue #24915: Add LLVM support for PGO builds and use the test suite to
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  generate the profile data. Initial patch by Alecsandru Patrascu of Intel.
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- Issue #24910: Windows MSIs now have unique display names.

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- Issue #24986: It is now possible to build Python on Windows without errors
  when external libraries are not available.

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Windows
-------
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- Issue #25450: Updates shortcuts to start Python in installation directory.

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- Issue #25164: Changes default all-users install directory to match per-user
  directory.

659 660
- Issue #25143: Improves installer error messages for unsupported platforms.

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- Issue #25163: Display correct directory in installer when using non-default
  settings.

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- Issue #25361: Disables use of SSE2 instructions in Windows 32-bit build

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- Issue #25089: Adds logging to installer for case where launcher is not
  selected on upgrade.

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- Issue #25165: Windows uninstallation should not remove launcher if other
  versions remain

- Issue #25112: py.exe launcher is missing icons
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- Issue #25102: Windows installer does not precompile for -O or -OO.

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- Issue #25081: Makes Back button in installer go back to upgrade page when
  upgrading.

679 680
- Issue #25091: Increases font size of the installer.

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- Issue #25126: Clarifies that the non-web installer will download some
  components.

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- Issue #25213: Restores requestedExecutionLevel to manifest to disable
  UAC virtualization.

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- Issue #25022: Removed very outdated PC/example_nt/ directory.

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

- Issue #25440: Fix output of python-config --extension-suffix.


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What's New in Python 3.5.0 final?
=================================

Release date: 2015-09-13

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Build
-----

- Issue #25071: Windows installer should not require TargetDir
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  parameter when installing quietly.

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What's New in Python 3.5.0 release candidate 4?
===============================================

Release date: 2015-09-09

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Library
-------

715
- Issue #25029: Fixes MemoryError in test_strptime.
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Build
-----

- Issue #25027: Reverts partial-static build options and adds
  vcruntime140.dll to Windows installation.


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What's New in Python 3.5.0 release candidate 3?
===============================================

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Release date: 2015-09-07
728 729 730 731

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

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- Issue #24305: Prevent import subsystem stack frames from being counted
  by the warnings.warn(stacklevel=) parameter.

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- Issue #24912: Prevent __class__ assignment to immutable built-in objects.

737 738
- Issue #24975: Fix AST compilation for PEP 448 syntax.

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Library
-------

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- Issue #24917: time_strftime() buffer over-read.

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- Issue #24748: To resolve a compatibility problem found with py2exe and
  pywin32, imp.load_dynamic() once again ignores previously loaded modules
  to support Python modules replacing themselves with extension modules.
  Patch by Petr Viktorin.

Guido van Rossum's avatar
Guido van Rossum committed
749 750 751
- Issue #24635: Fixed a bug in typing.py where isinstance([], typing.Iterable)
  would return True once, then False on subsequent calls.

752 753 754
- Issue #24989: Fixed buffer overread in BytesIO.readline() if a position is
  set beyond size.  Based on patch by John Leitch.

755 756 757
- Issue #24913: Fix overrun error in deque.index().
  Found by John Leitch and Bryce Darling.

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What's New in Python 3.5.0 release candidate 2?
===============================================

762
Release date: 2015-08-25
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Core and Builtins
-----------------

767 768 769
- Issue #24769: Interpreter now starts properly when dynamic loading
  is disabled.  Patch by Petr Viktorin.

770 771 772
- Issue #21167: NAN operations are now handled correctly when python is
  compiled with ICC even if -fp-model strict is not specified.

773 774 775 776
- Issue #24492: A "package" lacking a __name__ attribute when trying to perform
  a ``from .. import ...`` statement will trigger an ImportError instead of an
  AttributeError.

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Library
-------

780 781
- Issue #24847: Removes vcruntime140.dll dependency from Tcl/Tk.

782
- Issue #24839: platform._syscmd_ver raises DeprecationWarning
783

784 785
- Issue #24867: Fix Task.get_stack() for 'async def' coroutines

786

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What's New in Python 3.5.0 release candidate 1?
===============================================

Release date: 2015-08-09

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

795 796
- Issue #24667: Resize odict in all cases that the underlying dict resizes.

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Library
-------

800 801 802
- Issue #24824: Signatures of codecs.encode() and codecs.decode() now are
  compatible with pydoc.

803 804
- Issue #24634: Importing uuid should not try to load libc on Windows

805 806
- Issue #24798: _msvccompiler.py doesn't properly support manifests

807 808 809
- Issue #4395: Better testing and documentation of binary operators.
  Patch by Martin Panter.

810 811
- Issue #23973: Update typing.py from GitHub repo.

812 813
- Issue #23004: mock_open() now reads binary data correctly when the type of
  read_data is bytes.  Initial patch by Aaron Hill.
814

815 816
- Issue #23888: Handle fractional time in cookie expiry. Patch by ssh.

817 818 819
- Issue #23652: Make it possible to compile the select module against the
  libc headers from the Linux Standard Base, which do not include some
  EPOLL macros.  Patch by Matt Frank.
820

821 822
- Issue #22932: Fix timezones in email.utils.formatdate.
  Patch from Dmitry Shachnev.
823

824 825
- Issue #23779: imaplib raises TypeError if authenticator tries to abort.
  Patch from Craig Holmquist.
826

Victor Stinner's avatar
Victor Stinner committed
827 828
- Issue #23319: Fix ctypes.BigEndianStructure, swap correctly bytes. Patch
  written by Matthieu Gautier.
829

830 831
- Issue #23254: Document how to close the TCPServer listening socket.
  Patch from Martin Panter.
832

Ned Deily's avatar
Ned Deily committed
833
- Issue #19450: Update Windows and OS X installer builds to use SQLite 3.8.11.
834

835
- Issue #17527: Add PATCH to wsgiref.validator. Patch from Luca Sbardella.
836

837
- Issue #24791: Fix grammar regression for call syntax: 'g(\*a or b)'.
838

839 840 841 842 843 844
IDLE
----

- Issue #23672: Allow Idle to edit and run files with astral chars in name.
  Patch by Mohd Sanad Zaki Rizvi.

845
- Issue #24745: Idle editor default font. Switch from Courier to
846 847 848 849 850 851 852 853
  platform-sensitive TkFixedFont.  This should not affect current customized
  font selections.  If there is a problem, edit $HOME/.idlerc/config-main.cfg
  and remove 'fontxxx' entries from [Editor Window].  Patch by Mark Roseman.

- Issue #21192: Idle editor. When a file is run, put its name in the restart bar.
  Do not print false prompts. Original patch by Adnan Umer.

- Issue #13884: Idle menus. Remove tearoff lines. Patch by Roger Serwy.
854

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Documentation
-------------
857

Nick Coghlan's avatar
Nick Coghlan committed
858 859 860 861
- Issue #24129: Clarify the reference documentation for name resolution.
  This includes removing the assumption that readers will be familiar with the
  name resolution scheme Python used prior to the introduction of lexical
  scoping for function namespaces. Patch by Ivan Levkivskyi.
862

863
- Issue #20769: Improve reload() docs. Patch by Dorian Pula.
864

865
- Issue #23589: Remove duplicate sentence from the FAQ.  Patch by Yongzhi Pan.
866

867 868
- Issue #24729: Correct IO tutorial to match implementation regarding
  encoding parameter to open function.
869

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Tests
-----
872

873 874 875
- Issue #24751: When running regrtest with the ``-w`` command line option,
  a test run is no longer marked as a failure if all tests succeed when
  re-run.
876

877

878 879 880 881 882 883 884 885
What's New in Python 3.5.0 beta 4?
==================================

Release date: 2015-07-26

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

886 887 888
- Issue #23573: Restored optimization of bytes.rfind() and bytearray.rfind()
  for single-byte argument on Linux.

889 890
- Issue #24569: Make PEP 448 dictionary evaluation more consistent.

891 892
- Issue #24583: Fix crash when set is mutated while being updated.

893 894
- Issue #24407: Fix crash when dict is mutated while being updated.

895 896 897
- Issue #24619: New approach for tokenizing async/await. As a consequence,
  is is now possible to have one-line 'async def foo(): await ..' functions.

898 899 900
- Issue #24687: Plug refleak on SyntaxError in function parameters
  annotations.

901 902 903
- Issue #15944: memoryview: Allow arbitrary formats when casting to bytes.
  Patch by Martin Panter.

904 905 906
Library
-------

907 908 909
- Issue #23441: rcompleter now prints a tab character instead of displaying
  possible completions for an empty word.  Initial patch by Martin Sekera.

910 911 912
- Issue #24683: Fixed crashes in _json functions called with arguments of
  inappropriate type.

913 914 915
- Issue #21697: shutil.copytree() now correctly handles symbolic links that
  point to directories.  Patch by Eduardo Seabra and Thomas Kluyver.

916 917 918
- Issue #14373: Fixed segmentation fault when gc.collect() is called during
  constructing lru_cache (C implementation).

919 920 921 922
- Issue #24695: Fix a regression in traceback.print_exception().  If
  exc_traceback is None we shouldn't print a traceback header like described
  in the documentation.

923
- Issue #24620: Random.setstate() now validates the value of state last element.
924

925 926
- Issue #22485: Fixed an issue that caused `inspect.getsource` to return
  incorrect results on nested functions.
927

928
- Issue #22153: Improve unittest docs. Patch from Martin Panter and evilzero.
929

930 931 932
- Issue #24580: Symbolic group references to open group in re patterns now are
  explicitly forbidden as well as numeric group references.

933
- Issue #24206: Fixed __eq__ and __ne__ methods of inspect classes.
934

935
- Issue #24631: Fixed regression in the timeit module with multiline setup.
936

937 938
- Issue #18622: unittest.mock.mock_open().reset_mock would recurse infinitely.
  Patch from Nicola Palumbo and Laurent De Buyst.
939

940 941 942
- Issue #23661: unittest.mock side_effects can now be exceptions again. This
  was a regression vs Python 3.4. Patch from Ignacio Rossi

943
- Issue #24608: chunk.Chunk.read() now always returns bytes, not str.
944

945
- Issue #18684: Fixed reading out of the buffer in the re module.
946

947 948
- Issue #24259: tarfile now raises a ReadError if an archive is truncated
  inside a data segment.
949

950 951 952
- Issue #15014: SMTP.auth() and SMTP.login() now support RFC 4954's optional
  initial-response argument to the SMTP AUTH command.

953 954 955
- Issue #24669: Fix inspect.getsource() for 'async def' functions.
  Patch by Kai Groner.

956 957
- Issue #24688: ast.get_docstring() for 'async def' functions.

958 959
Build
-----
960

Ned Deily's avatar
Ned Deily committed
961 962
- Issue #24603: Update Windows builds and OS X 10.5 installer to use OpenSSL
  1.0.2d.
963

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965
What's New in Python 3.5.0 beta 3?
966 967 968 969 970 971 972
==================================

Release date: 2015-07-05

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

973 974 975 976
- Issue #24467: Fixed possible buffer over-read in bytearray. The bytearray
  object now always allocates place for trailing null byte and it's buffer now
  is always null-terminated.

977 978
- Upgrade to Unicode 8.0.0.

979 980
- Issue #24345: Add Py_tp_finalize slot for the stable ABI.

981 982 983 984 985 986
- Issue #24400: Introduce a distinct type for PEP 492 coroutines; add
  types.CoroutineType, inspect.getcoroutinestate, inspect.getcoroutinelocals;
  coroutines no longer use CO_GENERATOR flag; sys.set_coroutine_wrapper
  works only for 'async def' coroutines; inspect.iscoroutine no longer
  uses collections.abc.Coroutine, it's intended to test for pure 'async def'
  coroutines only; add new opcode: GET_YIELD_FROM_ITER; fix generators wrapper
987
  used in types.coroutine to be instance of collections.abc.Generator;
988 989 990
  collections.abc.Awaitable and collections.abc.Coroutine can no longer
  be used to detect generator-based coroutines--use inspect.isawaitable
  instead.
991

992 993 994
- Issue #24450: Add gi_yieldfrom to generators and cr_await to coroutines.
  Contributed by Benno Leslie and Yury Selivanov.

995 996
- Issue #19235: Add new RecursionError exception. Patch by Georg Brandl.

997 998 999
Library
-------

1000 1001 1002
- Issue #21750: mock_open.read_data can now be read from each instance, as it
  could in Python 3.3.

Benjamin Peterson's avatar
Benjamin Peterson committed
1003 1004
- Issue #24552: Fix use after free in an error case of the _pickle module.

1005 1006 1007
- Issue #24514: tarfile now tolerates number fields consisting of only
  whitespace.

1008 1009 1010 1011 1012 1013
- Issue #19176: Fixed doctype() related bugs in C implementation of ElementTree.
  A deprecation warning no longer issued by XMLParser subclass with default
  doctype() method.  Direct call of doctype() now issues a warning.  Parser's
  doctype() now is not called if target's doctype() is called.  Based on patch
  by Martin Panter.

1014 1015 1016
- Issue #20387: Restore semantic round-trip correctness in tokenize/untokenize
  for tab-indented blocks.

1017 1018 1019
- Issue #24456: Fixed possible buffer over-read in adpcm2lin() and lin2adpcm()
  functions of the audioop module.

1020 1021 1022
- Issue #24336: The contextmanager decorator now works with functions with
  keyword arguments called "func" and "self".  Patch by Martin Panter.

1023 1024
- Issue #24522: Fix possible integer overflow in json accelerator module.

1025 1026
- Issue #24489: ensure a previously set C errno doesn't disturb cmath.polar().

1027 1028 1029
- Issue #24408: Fixed AttributeError in measure() and metrics() methods of
  tkinter.Font.

1030 1031 1032
- Issue #14373: C implementation of functools.lru_cache() now can be used with
  methods.

1033 1034
- Issue #24347: Set KeyError if PyDict_GetItemWithError returns NULL.

1035 1036
- Issue #24348: Drop superfluous incref/decref.

1037 1038
- Issue #24359: Check for changed OrderedDict size during iteration.

1039 1040
- Issue #24368: Support keyword arguments in OrderedDict methods.

1041 1042
- Issue #24362: Simplify the C OrderedDict fast nodes resize logic.

1043 1044
- Issue #24377: Fix a ref leak in OrderedDict.__repr__.

1045 1046
- Issue #24369: Defend against key-changes during iteration.

1047 1048 1049 1050 1051 1052 1053
Tests
-----

- Issue #24373: _testmultiphase and xxlimited now use tp_traverse and
  tp_finalize to avoid reference leaks encountered when combining tp_dealloc
  with PyType_FromSpec (see issue #16690 for details)

1054 1055 1056
Documentation
-------------

1057 1058 1059
- Issue #24458: Update documentation to cover multi-phase initialization for
  extension modules (PEP 489). Patch by Petr Viktorin.

1060 1061 1062
- Issue #24351: Clarify what is meant by "identifier" in the context of
  string.Template instances.

1063 1064
Build
-----
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1066 1067
- Issue #24432: Update Windows builds and OS X 10.5 installer to use OpenSSL
  1.0.2c.
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What's New in Python 3.5.0 beta 2?
==================================

1073
Release date: 2015-05-31
1074 1075 1076 1077

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

1078 1079 1080 1081
- Issue #24284: The startswith and endswith methods of the str class no longer
  return True when finding the empty string and the indexes are completely out
  of range.

1082 1083 1084 1085
- Issue #24115: Update uses of PyObject_IsTrue(), PyObject_Not(),
  PyObject_IsInstance(), PyObject_RichCompareBool() and _PyDict_Contains()
  to check for and handle errors correctly.

1086 1087
- Issue #24328: Fix importing one character extension modules.

1088 1089
- Issue #11205: In dictionary displays, evaluate the key before the value.

1090 1091 1092
- Issue #24285: Fixed regression that prevented importing extension modules
  from inside packages. Patch by Petr Viktorin.

1093 1094 1095
Library
-------

Victor Stinner's avatar
Victor Stinner committed
1096
- Issue #23247: Fix a crash in the StreamWriter.reset() of CJK codecs.
1097

1098 1099 1100
- Issue #24270: Add math.isclose() and cmath.isclose() functions as per PEP 485.
  Contributed by Chris Barker and Tal Einat.

1101 1102
- Issue #5633: Fixed timeit when the statement is a string and the setup is not.

1103 1104 1105
- Issue #24326: Fixed audioop.ratecv() with non-default weightB argument.
  Original patch by David Moore.

1106 1107
- Issue #16991: Add a C implementation of OrderedDict.

1108 1109 1110
- Issue #23934: Fix inspect.signature to fail correctly for builtin types
  lacking signature information.  Initial patch by James Powell.

1111

1112 1113 1114
What's New in Python 3.5.0 beta 1?
==================================

Serhiy Storchaka's avatar
Serhiy Storchaka committed
1115
Release date: 2015-05-24
1116 1117 1118 1119

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

1120 1121
- Issue #24276: Fixed optimization of property descriptor getter.

1122 1123
- Issue #24268: PEP 489: Multi-phase extension module initialization.
  Patch by Petr Viktorin.
1124

1125 1126 1127
- Issue #23955: Add pyvenv.cfg option to suppress registry/environment
  lookup for generating sys.path on Windows.

1128 1129 1130
- Issue #24257: Fixed system error in the comparison of faked
  types.SimpleNamespace.

1131
- Issue #22939: Fixed integer overflow in iterator object.  Patch by
1132 1133
  Clement Rouault.

1134 1135 1136
- Issue #23985: Fix a possible buffer overrun when deleting a slice from
  the front of a bytearray and then appending some other bytes data.

1137 1138
- Issue #24102: Fixed exception type checking in standard error handlers.

1139 1140
- Issue #15027: The UTF-32 encoder is now 3x to 7x faster.

1141
- Issue #23290: Optimize set_merge() for cases where the target is empty.
1142 1143
  (Contributed by Serhiy Storchaka.)

1144 1145
- Issue #2292: PEP 448: Additional Unpacking Generalizations.

1146 1147 1148
- Issue #24096: Make warnings.warn_explicit more robust against mutation of the
  warnings.filters list.

1149 1150 1151
- Issue #23996: Avoid a crash when a delegated generator raises an
  unnormalized StopIteration exception.  Patch by Stefan Behnel.

1152 1153
- Issue #23910: Optimize property() getter calls.  Patch by Joe Jevnik.

1154 1155 1156
- Issue #23911: Move path-based importlib bootstrap code to a separate
  frozen module.

1157 1158
- Issue #24192: Fix namespace package imports.

1159
- Issue #24022: Fix tokenizer crash when processing undecodable source code.
1160

1161
- Issue #9951: Added a hex() method to bytes, bytearray, and memoryview.
1162

1163 1164
- Issue #22906: PEP 479: Change StopIteration handling inside generators.

1165 1166
- Issue #24017: PEP 492: Coroutines with async and await syntax.

1167 1168 1169
Library
-------

1170 1171 1172
- Issue #14373: Added C implementation of functools.lru_cache().  Based on
  patches by Matt Joiner and Alexey Kachayev.

1173
- Issue #24230: The tempfile module now accepts bytes for prefix, suffix and dir
1174 1175
  parameters and returns bytes in such situations (matching the os module APIs).

1176 1177 1178 1179
- Issue #22189: collections.UserString now supports __getnewargs__(),
  __rmod__(), casefold(), format_map(), isprintable(), and maketrans().
  Patch by Joe Jevnik.

1180
- Issue #24244: Prevents termination when an invalid format string is
1181 1182
  encountered on Windows in strftime.

1183 1184
- Issue #23973: PEP 484: Add the typing module.

1185 1186 1187 1188
- Issue #23086: The collections.abc.Sequence() abstract base class added
  *start* and *stop* parameters to the index() mixin.
  Patch by Devin Jeanpierre.

1189 1190 1191 1192
- Issue #20035: Replaced the ``tkinter._fix`` module used for setting up the
  Tcl/Tk environment on Windows with a private function in the ``_tkinter``
  module that makes no permanent changes to the environment.

1193 1194 1195
- Issue #24257: Fixed segmentation fault in sqlite3.Row constructor with faked
  cursor type.

1196 1197 1198 1199
- Issue #15836: assertRaises(), assertRaisesRegex(), assertWarns() and
  assertWarnsRegex() assertments now check the type of the first argument
  to prevent possible user error.  Based on patch by Daniel Wagner-Hall.

1200 1201 1202
- Issue #9858: Add missing method stubs to _io.RawIOBase.  Patch by Laura
  Rupprecht.

1203 1204 1205 1206
- Issue #22955: attrgetter, itemgetter and methodcaller objects in the operator
  module now support pickling.  Added readable and evaluable repr for these
  objects.  Based on patch by Josh Rosenberg.

1207 1208 1209 1210 1211
- Issue #22107: tempfile.gettempdir() and tempfile.mkdtemp() now try again
  when a directory with the chosen name already exists on Windows as well as
  on Unix.  tempfile.mkstemp() now fails early if parent directory is not
  valid (not exists or is a file) on Windows.

1212 1213
- Issue #23780: Improved error message in os.path.join() with single argument.

1214 1215 1216
- Issue #6598: Increased time precision and random number range in
  email.utils.make_msgid() to strengthen the uniqueness of the message ID.

1217 1218 1219
- Issue #24091: Fixed various crashes in corner cases in C implementation of
  ElementTree.

1220 1221 1222 1223
- Issue #21931: msilib.FCICreate() now raises TypeError in the case of a bad
  argument instead of a ValueError with a bogus FCI error number.
  Patch by Jeffrey Armstrong.

1224 1225
- Issue #13866: *quote_via* argument added to urllib.parse.urlencode.

Berker Peksag's avatar
Berker Peksag committed
1226
- Issue #20098: New mangle_from policy option for email, default True
1227 1228
  for compat32, but False for all other policies.

1229 1230 1231
- Issue #24211: The email library now supports RFC 6532: it can generate
  headers using utf-8 instead of encoded words.

1232 1233
- Issue #16314: Added support for the LZMA compression in distutils.

1234 1235
- Issue #21804: poplib now supports RFC 6856 (UTF8).

1236 1237
- Issue #18682: Optimized pprint functions for builtin scalar types.

1238 1239
- Issue #22027: smtplib now supports RFC 6531 (SMTPUTF8).

1240 1241
- Issue #23488: Random generator objects now consume 2x less memory on 64-bit.

1242 1243 1244
- Issue #1322: platform.dist() and platform.linux_distribution() functions are
  now deprecated.  Initial patch by Vajrasky Kok.

1245 1246 1247
- Issue #22486: Added the math.gcd() function.  The fractions.gcd() function now is
  deprecated.  Based on patch by Mark Dickinson.

1248 1249 1250
- Issue #24064: Property() docstrings are now writeable.
  (Patch by Berker Peksag.)

1251 1252
- Issue #22681: Added support for the koi8_t encoding.

1253 1254
- Issue #22682: Added support for the kz1048 encoding.

Berker Peksag's avatar
Berker Peksag committed
1255
- Issue #23796: peek and read1 methods of BufferedReader now raise ValueError
1256 1257
  if they called on a closed object. Patch by John Hergenroeder.

1258 1259 1260
- Issue #21795: smtpd now supports the 8BITMIME extension whenever
  the new *decode_data* constructor argument is set to False.

1261 1262 1263
- Issue #24155: optimize heapq.heapify() for better cache performance
  when heapifying large lists.

1264 1265 1266 1267
- Issue #21800: imaplib now supports RFC 5161 (enable), RFC 6855
  (utf8/internationalized email) and automatically encodes non-ASCII
  usernames and passwords to UTF8.

1268 1269
- Issue #20274: When calling a _sqlite.Connection, it now complains if passed
  any keyword arguments.  Previously it silently ignored them.
1270

1271 1272 1273
- Issue #20274: Remove ignored and erroneous "kwargs" parameters from three
  METH_VARARGS methods on _sqlite.Connection.

1274
- Issue #24134: assertRaises(), assertRaisesRegex(), assertWarns() and
1275 1276
  assertWarnsRegex() checks now emits a deprecation warning when callable is
  None or keyword arguments except msg is passed in the context manager mode.
1277

1278
- Issue #24018: Add a collections.abc.Generator abstract base class.
1279 1280
  Contributed by Stefan Behnel.

1281 1282 1283
- Issue #23880: Tkinter's getint() and getdouble() now support Tcl_Obj.
  Tkinter's getdouble() now supports any numbers (in particular int).

1284 1285 1286
- Issue #22619: Added negative limit support in the traceback module.
  Based on patch by Dmitry Kazakov.

Benjamin Peterson's avatar
Benjamin Peterson committed
1287 1288 1289
- Issue #24094: Fix possible crash in json.encode with poorly behaved dict
  subclasses.

1290 1291 1292
- Issue #9246: On POSIX, os.getcwd() now supports paths longer than 1025 bytes.
  Patch written by William Orr.

1293 1294 1295
- Issue #17445: add difflib.diff_bytes() to support comparison of
  byte strings (fixes a regression from Python 2).

1296 1297 1298
- Issue #23917: Fall back to sequential compilation when ProcessPoolExecutor
  doesn't exist.  Patch by Claudiu Popa.

1299 1300
- Issue #23008: Fixed resolving attributes with boolean value is False in pydoc.

1301 1302 1303 1304 1305 1306 1307 1308 1309 1310
- Fix asyncio issue 235: LifoQueue and PriorityQueue's put didn't
  increment unfinished tasks (this bug was introduced when
  JoinableQueue was merged with Queue).

- Issue #23908: os functions now reject paths with embedded null character
  on Windows instead of silently truncate them.

- Issue #23728: binascii.crc_hqx() could return an integer outside of the range
  0-0xffff for empty data.

1311
- Issue #23887: urllib.error.HTTPError now has a proper repr() representation.
1312 1313
  Patch by Berker Peksag.

1314 1315 1316 1317
- asyncio: New event loop APIs: set_task_factory() and get_task_factory().

- asyncio: async() function is deprecated in favour of ensure_future().

1318
- Issue #24178: asyncio.Lock, Condition, Semaphore, and BoundedSemaphore
1319 1320
  support new 'async with' syntax.  Contributed by Yury Selivanov.

1321
- Issue #24179: Support 'async for' for asyncio.StreamReader.
1322 1323
  Contributed by Yury Selivanov.

1324
- Issue #24184: Add AsyncIterator and AsyncIterable ABCs to
1325 1326
  collections.abc.  Contributed by Yury Selivanov.

1327
- Issue #22547: Implement informative __repr__ for inspect.BoundArguments.
1328 1329
  Contributed by Yury Selivanov.

1330
- Issue #24190: Implement inspect.BoundArgument.apply_defaults() method.
1331 1332
  Contributed by Yury Selivanov.

1333
- Issue #20691: Add 'follow_wrapped' argument to
1334 1335 1336
  inspect.Signature.from_callable() and inspect.signature().
  Contributed by Yury Selivanov.

1337
- Issue #24248: Deprecate inspect.Signature.from_function() and
1338 1339
  inspect.Signature.from_builtin().

1340 1341 1342
- Issue #23898: Fix inspect.classify_class_attrs() to support attributes
  with overloaded __eq__ and __bool__.  Patch by Mike Bayer.

1343 1344 1345
- Issue #24298: Fix inspect.signature() to correctly unwrap wrappers
  around bound methods.

Terry Jan Reedy's avatar
Terry Jan Reedy committed
1346 1347 1348 1349 1350 1351
IDLE
----

- Issue #23184: remove unused names and imports in idlelib.
  Initial patch by Al Sweigart.

1352 1353 1354
Tests
-----

Larry Hastings's avatar
Larry Hastings committed
1355 1356 1357
- Issue #21520: test_zipfile no longer fails if the word 'bad' appears
  anywhere in the name of the current directory.

1358 1359 1360
- Issue #9517: Move script_helper into the support package.
  Patch by Christie Wilson.

1361 1362 1363
Documentation
-------------

1364 1365 1366
- Issue #22155: Add File Handlers subsection with createfilehandler to tkinter
  doc.  Remove obsolete example from FAQ.  Patch by Martin Panter.

1367 1368
- Issue #24029: Document the name binding behavior for submodule imports.

Ned Deily's avatar
Ned Deily committed
1369 1370
- Issue #24077: Fix typo in man page for -I command option: -s, not -S

1371 1372 1373
Tools/Demos
-----------

1374 1375 1376
- Issue #24000: Improved Argument Clinic's mapping of converters to legacy
  "format units".  Updated the documentation to match.

1377 1378 1379
- Issue #24001: Argument Clinic converters now use accept={type}
  instead of types={'type'} to specify the types the converter accepts.

1380 1381
- Issue #23330: h2py now supports arbitrary filenames in #include.

1382
- Issue #24031: make patchcheck now supports git checkouts, too.
1383

1384

1385 1386 1387
What's New in Python 3.5.0 alpha 4?
===================================

1388
Release date: 2015-04-19
1389 1390 1391

Core and Builtins
-----------------
1392

1393 1394
- Issue #22980: Under Linux, GNU/KFreeBSD and the Hurd, C extensions now include
  the architecture triplet in the extension name, to make it easy to test builds
1395 1396
  for different ABIs in the same working tree.  Under OS X, the extension name
  now includes PEP 3149-style information.
1397

1398 1399
- Issue #22631: Added Linux-specific socket constant CAN_RAW_FD_FRAMES.
  Patch courtesy of Joe Jevnik.
1400

1401 1402
- Issue #23731: Implement PEP 488: removal of .pyo files.

1403 1404 1405
- Issue #23726: Don't enable GC for user subclasses of non-GC types that
  don't add any new fields.  Patch by Eugene Toder.

1406 1407 1408 1409 1410
- Issue #23309: Avoid a deadlock at shutdown if a daemon thread is aborted
  while it is holding a lock to a buffered I/O object, and the main thread
  tries to use the same I/O object (typically stdout or stderr).  A fatal
  error is emitted instead.

1411 1412 1413
- Issue #22977: Fixed formatting Windows error messages on Wine.
  Patch by Martin Panter.

1414 1415 1416
- Issue #23466: %c, %o, %x, and %X in bytes formatting now raise TypeError on
  non-integer input.

1417 1418 1419
- Issue #24044: Fix possible null pointer dereference in list.sort in out of
  memory conditions.

1420 1421
- Issue #21354: PyCFunction_New function is exposed by python DLL again.

1422 1423 1424
Library
-------

1425 1426 1427
- Issue #23840: tokenize.open() now closes the temporary binary file on error
  to fix a resource warning.

R David Murray's avatar
R David Murray committed
1428 1429
- Issue #16914: new debuglevel 2 in smtplib adds timestamps to debug output.

1430 1431 1432 1433
- Issue #7159: urllib.request now supports sending auth credentials
  automatically after the first 401.  This enhancement is a superset of the
  enhancement from issue #19494 and supersedes that change.

1434 1435 1436
- Issue #23703: Fix a regression in urljoin() introduced in 901e4e52b20a.
  Patch by Demian Brecht.

1437
- Issue #4254: Adds _curses.update_lines_cols().  Patch by Arnon Yaari
1438

1439
- Issue #19933: Provide default argument for ndigits in round. Patch by
1440 1441
  Vajrasky Kok.

1442 1443 1444 1445
- Issue #23193: Add a numeric_owner parameter to
  tarfile.TarFile.extract and tarfile.TarFile.extractall. Patch by
  Michael Vogt and Eric Smith.

1446 1447 1448
- Issue #23342: Add a subprocess.run() function than returns a CalledProcess
  instance for a more consistent API than the existing call* functions.

1449 1450 1451 1452
- Issue #21217: inspect.getsourcelines() now tries to compute the start and end
  lines from the code object, fixing an issue when a lambda function is used as
  decorator argument. Patch by Thomas Ballinger and Allison Kaptur.

Benjamin Peterson's avatar
Benjamin Peterson committed
1453
- Issue #24521: Fix possible integer overflows in the pickle module.
1454

Benjamin Peterson's avatar
Benjamin Peterson committed
1455 1456
- Issue #22931: Allow '[' and ']' in cookie values.

Benjamin Peterson's avatar
Benjamin Peterson committed
1457 1458
- The keywords attribute of functools.partial is now always a dictionary.

1459 1460 1461
- Issue #23811: Add missing newline to the PyCompileError error message.
  Patch by Alex Shkop.

1462 1463 1464
- Issue #21116: Avoid blowing memory when allocating a multiprocessing shared
  array that's larger than 50% of the available RAM.  Patch by Médéric Boquien.

1465 1466 1467
- Issue #22982: Improve BOM handling when seeking to multiple positions of
  a writable text file.

1468 1469
- Issue #23464: Removed deprecated asyncio JoinableQueue.

1470 1471 1472 1473 1474
- Issue #23529: Limit the size of decompressed data when reading from
  GzipFile, BZ2File or LZMAFile.  This defeats denial of service attacks
  using compressed bombs (i.e. compressed payloads which decompress to a huge
  size).  Patch by Martin Panter and Nikolaus Rath.

1475 1476
- Issue #21859: Added Python implementation of io.FileIO.

1477
- Issue #23865: close() methods in multiple modules now are idempotent and more
Andrew Kuchling's avatar
Andrew Kuchling committed
1478 1479
  robust at shutdown. If they need to release multiple resources, all are
  released even if errors occur.
1480

1481 1482 1483
- Issue #23400: Raise same exception on both Python 2 and 3 if sem_open is not
  available.  Patch by Davin Potts.

1484 1485
- Issue #10838: The subprocess now module includes SubprocessError and
  TimeoutError in its list of exported names for the users wild enough
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Zachary Ware committed
1486
  to use ``from subprocess import *``.
1487

1488 1489 1490 1491
- Issue #23411: Added DefragResult, ParseResult, SplitResult, DefragResultBytes,
  ParseResultBytes, and SplitResultBytes to urllib.parse.__all__.
  Patch by Martin Panter.

1492 1493 1494
- Issue #23881: urllib.request.ftpwrapper constructor now closes the socket if
  the FTP connection failed to fix a ResourceWarning.

1495 1496 1497 1498
- Issue #23853: :meth:`socket.socket.sendall` does no more reset the socket
  timeout each time data is sent successfuly. The socket timeout is now the
  maximum total duration to send all data.

1499 1500 1501 1502
- Issue #22721: An order of multiline pprint output of set or dict containing
  orderable and non-orderable elements no longer depends on iteration order of
  set or dict.

1503 1504 1505 1506
- Issue #15133: _tkinter.tkapp.getboolean() now supports Tcl_Obj and always
  returns bool.  tkinter.BooleanVar now validates input values (accepted bool,
  int, str, and Tcl_Obj).  tkinter.BooleanVar.get() now always returns bool.

1507 1508
- Issue #10590: xml.sax.parseString() now supports string argument.

1509 1510 1511
- Issue #23338: Fixed formatting ctypes error messages on Cygwin.
  Patch by Makoto Kato.

1512 1513
- Issue #15582: inspect.getdoc() now follows inheritance chains.

1514 1515
- Issue #2175: SAX parsers now support a character stream of InputSource object.

1516 1517 1518
- Issue #16840: Tkinter now supports 64-bit integers added in Tcl 8.4 and
  arbitrary precision integers added in Tcl 8.5.

1519 1520 1521
- Issue #23834: Fix socket.sendto(), use the C Py_ssize_t type to store the
  result of sendto() instead of the C int type.

1522 1523 1524 1525 1526 1527
- Issue #23618: :meth:`socket.socket.connect` now waits until the connection
  completes instead of raising :exc:`InterruptedError` if the connection is
  interrupted by signals, signal handlers don't raise an exception and the
  socket is blocking or has a timeout. :meth:`socket.socket.connect` still
  raise :exc:`InterruptedError` for non-blocking sockets.

1528 1529
- Issue #21526: Tkinter now supports new boolean type in Tcl 8.5.

1530 1531 1532
- Issue #23836: Fix the faulthandler module to handle reentrant calls to
  its signal handlers.

1533 1534 1535
- Issue #23838: linecache now clears the cache and returns an empty result on
  MemoryError.

1536 1537 1538
- Issue #10395: Added os.path.commonpath(). Implemented in posixpath and ntpath.
  Based on patch by Rafik Draoui.

1539 1540 1541
- Issue #23611: Serializing more "lookupable" objects (such as unbound methods
  or nested classes) now are supported with pickle protocols < 4.

1542 1543
- Issue #13583: sqlite3.Row now supports slice indexing.

1544 1545 1546 1547
- Issue #18473: Fixed 2to3 and 3to2 compatible pickle mappings.  Fixed
  ambigious reverse mappings.  Added many new mappings.  Import mapping is no
  longer applied to modules already mapped with full name mapping.

1548 1549 1550 1551
- Issue #23485: select.select() is now retried automatically with the
  recomputed timeout when interrupted by a signal, except if the signal handler
  raises an exception. This change is part of the PEP 475.

1552 1553 1554 1555
- Issue #23752: When built from an existing file descriptor, io.FileIO() now
  only calls fstat() once. Before fstat() was called twice, which was not
  necessary.

1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566
- Issue #23704: collections.deque() objects now support __add__, __mul__, and
  __imul__().

- Issue #23171: csv.Writer.writerow() now supports arbitrary iterables.

- Issue #23745: The new email header parser now handles duplicate MIME
  parameter names without error, similar to how get_param behaves.

- Issue #22117: Fix os.utime(), it now rounds the timestamp towards minus
  infinity (-inf) instead of rounding towards zero.

1567 1568 1569
- Issue #23310: Fix MagicMock's initializer to work with __methods__, just
  like configure_mock().  Patch by Kasia Jachim.

1570 1571 1572
Build
-----

1573 1574 1575
- Issue #23817: FreeBSD now uses "1.0" the the SOVERSION as other operating
  systems, instead of just "1".

1576
- Issue #23501: Argument Clinic now generates code into separate files by default.
1577

1578 1579 1580
Tests
-----

1581 1582 1583 1584 1585 1586
- Issue #23799: Added test.support.start_threads() for running and
  cleaning up multiple threads.

- Issue #22390: test.regrtest now emits a warning if temporary files or
  directories are left after running a test.

1587 1588 1589
Tools/Demos
-----------

1590 1591 1592
- Issue #18128: pygettext now uses standard +NNNN format in the
  POT-Creation-Date header.

1593 1594 1595 1596
- Issue #23935: Argument Clinic's understanding of format units
  accepting bytes, bytearrays, and buffers is now consistent with
  both the documentation and the implementation.

1597 1598
- Issue #23944: Argument Clinic now wraps long impl prototypes at column 78.

1599 1600 1601
- Issue #20586: Argument Clinic now ensures that functions without docstrings
  have signatures.

1602 1603 1604 1605 1606 1607 1608
- Issue #23492: Argument Clinic now generates argument parsing code with
  PyArg_Parse instead of PyArg_ParseTuple if possible.

- Issue #23500: Argument Clinic is now smarter about generating the "#ifndef"
  (empty) definition of the methoddef macro: it's only generated once, even
  if Argument Clinic processes the same symbol multiple times, and it's emitted
  at the end of all processing rather than immediately after the first use.
1609

1610 1611 1612 1613 1614
C API
-----

- Issue #23998: PyImport_ReInitLock() now checks for lock allocation error

1615

1616 1617 1618 1619 1620 1621 1622 1623
What's New in Python 3.5.0 alpha 3?
===================================

Release date: 2015-03-28

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

1624 1625 1626 1627
- Issue #23573: Increased performance of string search operations (str.find,
  str.index, str.count, the in operator, str.split, str.partition) with
  arguments of different kinds (UCS1, UCS2, UCS4).

1628 1629 1630
- Issue #23753: Python doesn't support anymore platforms without stat() or
  fstat(), these functions are always required.

1631 1632
- Issue #23681: The -b option now affects comparisons of bytes with int.

1633 1634 1635
- Issue #23632: Memoryviews now allow tuple indexing (including for
  multi-dimensional memoryviews).

1636 1637
- Issue #23192: Fixed generator lambdas.  Patch by Bruno Cauet.

1638 1639 1640
- Issue #23629: Fix the default __sizeof__ implementation for variable-sized
  objects.

1641 1642 1643
Library
-------

1644 1645 1646
- Issue #14260: The groupindex attribute of regular expression pattern object
  now is non-modifiable mapping.

1647 1648 1649 1650
- Issue #23792: Ignore KeyboardInterrupt when the pydoc pager is active.
  This mimics the behavior of the standard unix pagers, and prevents
  pipepager from shutting down while the pager itself is still running.

1651 1652 1653
- Issue #23775: pprint() of OrderedDict now outputs the same representation
  as repr().

1654 1655
- Issue #23765: Removed IsBadStringPtr calls in ctypes

1656 1657
- Issue #22364: Improved some re error messages using regex for hints.

1658 1659
- Issue #23742: ntpath.expandvars() no longer loses unbalanced single quotes.

1660 1661 1662
- Issue #21717: The zipfile.ZipFile.open function now supports 'x' (exclusive
  creation) mode.

1663 1664 1665
- Issue #21802: The reader in BufferedRWPair now is closed even when closing
  writer failed in BufferedRWPair.close().

1666 1667 1668 1669
- Issue #23622: Unknown escapes in regular expressions that consist of ``'\'``
  and ASCII letter now raise a deprecation warning and will be forbidden in
  Python 3.6.

1670 1671 1672 1673
- Issue #23671: string.Template now allows to specify the "self" parameter as
  keyword argument.  string.Formatter now allows to specify the "self" and
  the "format_string" parameters as keyword arguments.

1674 1675
- Issue #23502: The pprint module now supports mapping proxies.

1676 1677
- Issue #17530: pprint now wraps long bytes objects and bytearrays.

1678 1679 1680
- Issue #22687: Fixed some corner cases in breaking words in tetxtwrap.
  Got rid of quadratic complexity in breaking long words.

1681
- Issue #4727: The copy module now uses pickle protocol 4 (PEP 3154) and
1682 1683 1684
  supports copying of instances of classes whose __new__ method takes
  keyword-only arguments.

1685 1686 1687 1688 1689 1690
- Issue #23491: Added a zipapp module to support creating executable zip
  file archives of Python code. Registered ".pyz" and ".pyzw" extensions
  on Windows for these archives (PEP 441).

- Issue #23657: Avoid explicit checks for str in zipapp, adding support
  for pathlib.Path objects as arguments.
1691

1692 1693 1694 1695
- Issue #23688: Added support of arbitrary bytes-like objects and avoided
  unnecessary copying of memoryview in gzip.GzipFile.write().
  Original patch by Wolfgang Maier.

1696
- Issue #23252: Added support for writing ZIP files to unseekable streams.
1697

1698 1699
- Issue #23647: Increase impalib's MAXLINE to accommodate modern mailbox sizes.

1700 1701 1702 1703
- Issue #23539: If body is None, http.client.HTTPConnection.request now sets
  Content-Length to 0 for PUT, POST, and PATCH headers to avoid 411 errors from
  some web servers.

1704 1705 1706 1707
- Issue #22351: The nntplib.NNTP constructor no longer leaves the connection
  and socket open until the garbage collector cleans them up.  Patch by
  Martin Panter.

1708 1709 1710 1711
- Issue #23704: collections.deque() objects now support methods for index(),
  insert(), and copy().  This allows deques to be registered as a
  MutableSequence and it improves their substitutablity for lists.

1712 1713 1714 1715 1716
- Issue #23715: :func:`signal.sigwaitinfo` and :func:`signal.sigtimedwait` are
  now retried when interrupted by a signal not in the *sigset* parameter, if
  the signal handler does not raise an exception. signal.sigtimedwait()
  recomputes the timeout with a monotonic clock when it is retried.

1717 1718 1719 1720
- Issue #23001: Few functions in modules mmap, ossaudiodev, socket, ssl, and
  codecs, that accepted only read-only bytes-like object now accept writable
  bytes-like object too.

1721 1722 1723 1724
- Issue #23646: If time.sleep() is interrupted by a signal, the sleep is now
  retried with the recomputed delay, except if the signal handler raises an
  exception (PEP 475).

1725
- Issue #23136: _strptime now uniformly handles all days in week 0, including
1726
  Dec 30 of previous year.  Based on patch by Jim Carroll.
1727

1728 1729 1730
- Issue #23700: Iterator of NamedTemporaryFile now keeps a reference to
  NamedTemporaryFile instance.  Patch by Bohuslav Kabrda.

1731 1732 1733
- Issue #22903: The fake test case created by unittest.loader when it fails
  importing a test module is now picklable.

1734 1735 1736 1737 1738
- Issue #22181: On Linux, os.urandom() now uses the new getrandom() syscall if
  available, syscall introduced in the Linux kernel 3.17. It is more reliable
  and more secure, because it avoids the need of a file descriptor and waits
  until the kernel has enough entropy.

1739 1740 1741 1742 1743 1744 1745 1746
- Issue #2211: Updated the implementation of the http.cookies.Morsel class.
  Setting attributes key, value and coded_value directly now is deprecated.
  update() and setdefault() now transform and check keys.  Comparing for
  equality now takes into account attributes key, value and coded_value.
  copy() now returns a Morsel, not a dict.  repr() now contains all attributes.
  Optimized checking keys and quoting values.  Added new tests.
  Original patch by Demian Brecht.

1747
- Issue #18983: Allow selection of output units in timeit.
1748
  Patch by Julian Gindi.
1749

1750 1751
- Issue #23631: Fix traceback.format_list when a traceback has been mutated.

1752 1753 1754
- Issue #23568: Add rdivmod support to MagicMock() objects.
  Patch by Håkan Lövdahl.

1755 1756
- Issue #2052: Add charset parameter to HtmlDiff.make_file().

1757 1758
- Issue #23668: Support os.truncate and os.ftruncate on Windows.

1759 1760 1761
- Issue #23138: Fixed parsing cookies with absent keys or values in cookiejar.
  Patch by Demian Brecht.

1762 1763 1764 1765
- Issue #23051: multiprocessing.Pool methods imap() and imap_unordered() now
  handle exceptions raised by an iterator.  Patch by Alon Diamant and Davin
  Potts.

1766 1767
- Issue #23581: Add matmul support to MagicMock. Patch by Håkan Lövdahl.

1768 1769 1770 1771
- Issue #23566: enable(), register(), dump_traceback() and
  dump_traceback_later() functions of faulthandler now accept file
  descriptors. Patch by Wei Wu.

1772 1773
- Issue #22928: Disabled HTTP header injections in http.client.
  Original patch by Demian Brecht.
1774

1775 1776 1777
- Issue #23615: Modules bz2, tarfile and tokenize now can be reloaded with
  imp.reload().  Patch by Thomas Kluyver.

1778 1779 1780 1781
- Issue #23605: os.walk() now calls os.scandir() instead of os.listdir().
  The usage of os.scandir() reduces the number of calls to os.stat().
  Initial patch written by Ben Hoyt.

1782 1783 1784 1785
Build
-----

- Issue #23585: make patchcheck will ensure the interpreter is built.
1786

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1787 1788 1789
Tests
-----

1790 1791
- Issue #23583: Added tests for standard IO streams in IDLE.

Ned Deily's avatar
Ned Deily committed
1792 1793
- Issue #22289: Prevent test_urllib2net failures due to ftp connection timeout.

1794 1795 1796 1797 1798 1799 1800 1801
Tools/Demos
-----------

- Issue #22826: The result of open() in Tools/freeze/bkfile.py is now better
  compatible with regular files (in particular it now supports the context
  management protocol).


1802 1803 1804
What's New in Python 3.5 alpha 2?
=================================

1805
Release date: 2015-03-09
1806 1807 1808 1809

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

1810 1811 1812 1813
- Issue #23571: PyObject_Call() and PyCFunction_Call() now raise a SystemError
  if a function returns a result and raises an exception. The SystemError is
  chained to the previous exception.

1814 1815
Library
-------
1816

1817 1818 1819 1820
- Issue #22524: New os.scandir() function, part of the PEP 471: "os.scandir()
  function -- a better and faster directory iterator". Patch written by Ben
  Hoyt.

1821 1822
- Issue #23103: Reduced the memory consumption of IPv4Address and IPv6Address.

1823 1824 1825
- Issue #21793: BaseHTTPRequestHandler again logs response code as numeric,
  not as stringified enum.  Patch by Demian Brecht.

1826 1827 1828
- Issue #23476: In the ssl module, enable OpenSSL's X509_V_FLAG_TRUSTED_FIRST
  flag on certificate stores when it is available.

1829 1830 1831
- Issue #23576: Avoid stalling in SSL reads when EOF has been reached in the
  SSL layer but the underlying connection hasn't been closed.

1832 1833
- Issue #23504: Added an __all__ to the types module.

1834 1835
- Issue #23563: Optimized utility functions in urllib.parse.

1836 1837
- Issue #7830: Flatten nested functools.partial.

1838 1839
- Issue #20204: Added the __module__ attribute to _tkinter classes.

1840 1841 1842 1843
- Issue #19980: Improved help() for non-recognized strings.  help('') now
  shows the help on str.  help('help') now shows the help on help().
  Original patch by Mark Lawrence.

1844 1845 1846 1847
- Issue #23521: Corrected pure python implementation of timedelta division.

 * Eliminated OverflowError from timedelta * float for some floats;
 * Corrected rounding in timedlta true division.
1848

1849 1850 1851
- Issue #21619: Popen objects no longer leave a zombie after exit in the with
  statement if the pipe was broken.  Patch by Martin Panter.

1852 1853
- Issue #22936: Make it possible to show local variables in tracebacks for
  both the traceback module and unittest.
1854

1855 1856 1857
- Issue #15955: Add an option to limit the output size in bz2.decompress().
  Patch by Nikolaus Rath.

1858 1859 1860
- Issue #6639: Module-level turtle functions no longer raise TclError after
  closing the window.

1861 1862 1863
- Issues #814253, #9179: Group references and conditional group references now
  work in lookbehind assertions in regular expressions.

1864 1865 1866 1867
- Issue #23215: Multibyte codecs with custom error handlers that ignores errors
  consumed too much memory and raised SystemError or MemoryError.
  Original patch by Aleksi Torhamo.

1868 1869 1870
- Issue #5700: io.FileIO() called flush() after closing the file.
  flush() was not called in close() if closefd=False.

1871 1872 1873
- Issue #23374: Fixed pydoc failure with non-ASCII files when stdout encoding
  differs from file system encoding (e.g. on Mac OS).

1874 1875
- Issue #23481: Remove RC4 from the SSL module's default cipher list.

1876 1877 1878
- Issue #21548: Fix pydoc.synopsis() and pydoc.apropos() on modules with empty
  docstrings.

1879 1880 1881
- Issue #22885: Fixed arbitrary code execution vulnerability in the dbm.dumb
  module.  Original patch by Claudiu Popa.

1882 1883
- Issue #23239: ssl.match_hostname() now supports matching of IP addresses.

1884 1885 1886
- Issue #23146: Fix mishandling of absolute Windows paths with forward
  slashes in pathlib.

1887 1888 1889
- Issue #23096: Pickle representation of floats with protocol 0 now is the same
  for both Python and C implementations.

1890 1891
- Issue #19105: pprint now more efficiently uses free space at the right.

1892 1893 1894
- Issue #14910: Add allow_abbrev parameter to argparse.ArgumentParser. Patch by
  Jonathan Paugh, Steven Bethard, paul j3 and Daniel Eriksson.

1895 1896
- Issue #21717: tarfile.open() now supports 'x' (exclusive creation) mode.

1897 1898
- Issue #23344: marshal.dumps() is now 20-25% faster on average.

1899 1900 1901
- Issue #20416: marshal.dumps() with protocols 3 and 4 is now 40-50% faster on
  average.

1902 1903
- Issue #23421: Fixed compression in tarfile CLI.  Patch by wdv4758h.

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1904 1905
- Issue #23367: Fix possible overflows in the unicodedata module.

1906
- Issue #23361: Fix possible overflow in Windows subprocess creation code.
1907

1908 1909 1910
- logging.handlers.QueueListener now takes a respect_handler_level keyword
  argument which, if set to True, will pass messages to handlers taking handler
  levels into account.
1911

1912 1913 1914
- Issue #19705: turtledemo now has a visual sorting algorithm demo.  Original
  patch from Jason Yeo.

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1915 1916
- Issue #23801: Fix issue where cgi.FieldStorage did not always ignore the
  entire preamble to a multipart body.
1917

1918 1919 1920 1921 1922 1923
Build
-----

- Issue #23445: pydebug builds now use "gcc -Og" where possible, to make
  the resulting executable faster.

1924
- Issue #23686: Update OS X 10.5 installer build to use OpenSSL 1.0.2a.
1925

1926 1927 1928
C API
-----

1929
- Issue #20204: Deprecation warning is now raised for builtin types without the
1930 1931
  __module__ attribute.

1932 1933 1934
Windows
-------

1935 1936 1937
- Issue #23465: Implement PEP 486 - Make the Python Launcher aware of virtual
  environments. Patch by Paul Moore.

1938 1939 1940
- Issue #23437: Make user scripts directory versioned on Windows. Patch by Paul
  Moore.

1941

1942 1943 1944
What's New in Python 3.5 alpha 1?
=================================

Larry Hastings's avatar
Larry Hastings committed
1945
Release date: 2015-02-08
1946 1947 1948 1949

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

1950 1951
- Issue #23285: PEP 475 - EINTR handling.

1952 1953 1954
- Issue #22735: Fix many edge cases (including crashes) involving custom mro()
  implementations.

1955 1956 1957
- Issue #22896: Avoid using PyObject_AsCharBuffer(), PyObject_AsReadBuffer()
  and PyObject_AsWriteBuffer().

1958 1959 1960
- Issue #21295: Revert some changes (issue #16795) to AST line numbers and
  column offsets that constituted a regression.

1961 1962 1963
- Issue #22986: Allow changing an object's __class__ between a dynamic type and
  static type in some cases.

1964 1965 1966 1967 1968
- Issue #15859: PyUnicode_EncodeFSDefault(), PyUnicode_EncodeMBCS() and
  PyUnicode_EncodeCodePage() now raise an exception if the object is not an
  Unicode object. For PyUnicode_EncodeFSDefault(), it was already the case on
  platforms other than Windows. Patch written by Campbell Barton.

1969
- Issue #21408: The default __ne__() now returns NotImplemented if __eq__()
1970
  returned NotImplemented.  Original patch by Martin Panter.
1971

1972 1973 1974
- Issue #23321: Fixed a crash in str.decode() when error handler returned
  replacment string longer than mailformed input data.

1975 1976 1977
- Issue #22286: The "backslashreplace" error handlers now works with
  decoding and translating.

1978 1979 1980
- Issue #23253: Delay-load ShellExecute[AW] in os.startfile for reduced
  startup overhead on Windows.

1981 1982 1983 1984
- Issue #22038: pyatomic.h now uses stdatomic.h or GCC built-in functions for
  atomic memory access if available. Patch written by Vitor de Lima and Gustavo
  Temple.

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1985 1986 1987
- Issue #20284: %-interpolation (aka printf) formatting added for bytes and
  bytearray.

1988 1989
- Issue #23048: Fix jumping out of an infinite while loop in the pdb.

1990 1991 1992
- Issue #20335: bytes constructor now raises TypeError when encoding or errors
  is specified with non-string argument.  Based on patch by Renaud Blanch.

1993 1994 1995
- Issue #22834: If the current working directory ends up being set to a
  non-existent directory then import will no longer raise FileNotFoundError.

1996 1997 1998
- Issue #22869: Move the interpreter startup & shutdown code to a new
  dedicated pylifecycle.c module

1999 2000
- Issue #22847: Improve method cache efficiency.

2001 2002 2003
- Issue #22335: Fix crash when trying to enlarge a bytearray to 0x7fffffff
  bytes on a 32-bit platform.

2004 2005 2006
- Issue #22653: Fix an assertion failure in debug mode when doing a reentrant
  dict insertion in debug mode.

2007 2008 2009
- Issue #22643: Fix integer overflow in Unicode case operations (upper, lower,
  title, swapcase, casefold).

2010 2011 2012
- Issue #17636: Circular imports involving relative imports are now
  supported.

2013 2014 2015
- Issue #22604: Fix assertion error in debug mode when dividing a complex
  number by (nan+0j).

2016 2017 2018
- Issue #21052: Do not raise ImportWarning when sys.path_hooks or sys.meta_path
  are set to None.

2019 2020 2021 2022
- Issue #16518: Use 'bytes-like object required' in error messages that
  previously used the far more cryptic "'x' does not support the buffer
  protocol.

2023
- Issue #22470: Fixed integer overflow issues in "backslashreplace",
2024 2025
  "xmlcharrefreplace", and "surrogatepass" error handlers.

2026 2027 2028
- Issue #22540: speed up `PyObject_IsInstance` and `PyObject_IsSubclass` in the
  common case that the second argument has metaclass `type`.

2029 2030 2031
- Issue #18711: Add a new `PyErr_FormatV` function, similar to `PyErr_Format`
  but accepting a `va_list` argument.

2032 2033 2034
- Issue #22520: Fix overflow checking when generating the repr of a unicode
  object.

2035 2036
- Issue #22519: Fix overflow checking in PyBytes_Repr.

Benjamin Peterson's avatar
Benjamin Peterson committed
2037 2038
- Issue #22518: Fix integer overflow issues in latin-1 encoding.

2039 2040 2041
- Issue #16324: _charset parameter of MIMEText now also accepts
  email.charset.Charset instances. Initial patch by Claude Paroz.

2042 2043 2044
- Issue #1764286: Fix inspect.getsource() to support decorated functions.
  Patch by Claudiu Popa.

2045 2046
- Issue #18554: os.__all__ includes posix functions.

2047 2048
- Issue #21391: Use os.path.abspath in the shutil module.

2049 2050 2051
- Issue #11471: avoid generating a JUMP_FORWARD instruction at the end of
  an if-block if there is no else-clause.  Original patch by Eugene Toder.

2052 2053 2054
- Issue #22215: Now ValueError is raised instead of TypeError when str or bytes
  argument contains not permitted null character or byte.

2055
- Issue #22258: Fix the internal function set_inheritable() on Illumos.
2056 2057 2058 2059
  This platform exposes the function ``ioctl(FIOCLEX)``, but calling it fails
  with errno is ENOTTY: "Inappropriate ioctl for device". set_inheritable()
  now falls back to the slower ``fcntl()`` (``F_GETFD`` and then ``F_SETFD``).

2060 2061 2062
- Issue #21389: Displaying the __qualname__ of the underlying function in the
  repr of a bound method.

2063 2064 2065
- Issue #22206: Using pthread, PyThread_create_key() now sets errno to ENOMEM
  and returns -1 (error) on integer overflow.

2066 2067 2068
- Issue #20184: Argument Clinic based signature introspection added for
  30 of the builtin functions.

2069 2070 2071
- Issue #22116: C functions and methods (of the 'builtin_function_or_method'
  type) can now be weakref'ed.  Patch by Wei Wu.

2072
- Issue #22077: Improve index error messages for bytearrays, bytes, lists,
2073
  and tuples by adding 'or slices'. Added ', not <typename>' for bytearrays.
2074 2075
  Original patch by Claudiu Popa.

2076 2077 2078
- Issue #20179: Apply Argument Clinic to bytes and bytearray.
  Patch by Tal Einat.

2079 2080
- Issue #22082: Clear interned strings in slotdefs.

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2081 2082
- Upgrade Unicode database to Unicode 7.0.0.

2083 2084 2085
- Issue #21897: Fix a crash with the f_locals attribute with closure
  variables when frame.clear() has been called.

2086 2087 2088 2089 2090 2091
- Issue #21205: Add a new ``__qualname__`` attribute to generator, the
  qualified name, and use it in the representation of a generator
  (``repr(gen)``). The default name of the generator (``__name__`` attribute)
  is now get from the function instead of the code. Use ``gen.gi_code.co_name``
  to get the name of the code.

2092 2093 2094 2095 2096
- Issue #21669: With the aid of heuristics in SyntaxError.__init__, the
  parser now attempts to generate more meaningful (or at least more search
  engine friendly) error messages when "exec" and "print" are used as
  statements.

2097
- Issue #21642: In the conditional if-else expression, allow an integer written
2098 2099 2100
  with no space between itself and the ``else`` keyword (e.g. ``True if 42else
  False``) to be valid syntax.

2101 2102 2103 2104 2105
- Issue #21523: Fix over-pessimistic computation of the stack effect of
  some opcodes in the compiler.  This also fixes a quadratic compilation
  time issue noticeable when compiling code with a large number of "and"
  and "or" operators.

2106 2107 2108
- Issue #21418: Fix a crash in the builtin function super() when called without
  argument and without current frame (ex: embedded Python).

2109 2110 2111
- Issue #21425: Fix flushing of standard streams in the interactive
  interpreter.

2112 2113 2114 2115
- Issue #21435: In rare cases, when running finalizers on objects in cyclic
  trash a bad pointer dereference could occur due to a subtle flaw in
  internal iteration logic.

2116 2117 2118
- Issue #21377: PyBytes_Concat() now tries to concatenate in-place when the
  first argument has a reference count of 1.  Patch by Nikolaus Rath.

2119 2120 2121
- Issue #20355: -W command line options now have higher priority than the
  PYTHONWARNINGS environment variable.  Patch by Arfrever.

2122 2123
- Issue #21274: Define PATH_MAX for GNU/Hurd in Python/pythonrun.c.

2124 2125
- Issue #20904: Support setting FPU precision on m68k.

2126 2127 2128
- Issue #21209: Fix sending tuples to custom generator objects with the yield
  from syntax.

2129 2130 2131
- Issue #21193: pow(a, b, c) now raises ValueError rather than TypeError when b
  is negative.  Patch by Josh Rosenberg.

2132 2133
- PEP 465 and Issue #21176: Add the '@' operator for matrix multiplication.

2134 2135 2136
- Issue #21134: Fix segfault when str is called on an uninitialized
  UnicodeEncodeError, UnicodeDecodeError, or UnicodeTranslateError object.

2137 2138 2139
- Issue #19537: Fix PyUnicode_DATA() alignment under m68k.  Patch by
  Andreas Schwab.

2140 2141 2142 2143 2144 2145 2146 2147
- Issue #20929: Add a type cast to avoid shifting a negative number.

- Issue #20731: Properly position in source code files even if they
  are opened in text mode. Patch by Serhiy Storchaka.

- Issue #20637: Key-sharing now also works for instance dictionaries of
  subclasses.  Patch by Peter Ingebretson.

2148 2149 2150
- Issue #8297: Attributes missing from modules now include the module name
  in the error text.  Original patch by ysj.ray.

2151 2152
- Issue #19995: %c, %o, %x, and %X now raise TypeError on non-integer input.

2153 2154 2155 2156 2157
- Issue #19655: The ASDL parser - used by the build process to generate code for
  managing the Python AST in C - was rewritten. The new parser is self contained
  and does not require to carry long the spark.py parser-generator library;
  spark.py was removed from the source base.

2158
- Issue #12546: Allow ``\x00`` to be used as a fill character when using str, int,
2159 2160
  float, and complex __format__ methods.

2161 2162
- Issue #20480: Add ipaddress.reverse_pointer. Patch by Leon Weber.

2163
- Issue #13598: Modify string.Formatter to support auto-numbering of
2164
  replacement fields. It now matches the behavior of str.format() in
2165
  this regard. Patches by Phil Elson and Ramchandra Apte.
2166

2167 2168 2169 2170
- Issue #8931: Make alternate formatting ('#') for type 'c' raise an
  exception. In versions prior to 3.5, '#' with 'c' had no effect. Now
  specifying it is an error.  Patch by Torsten Landschoff.

2171 2172 2173
- Issue #23165: Perform overflow checks before allocating memory in the
  _Py_char2wchar function.

2174 2175 2176
Library
-------

2177 2178
- Issue #23399: pyvenv creates relative symlinks where possible.

2179 2180 2181
- Issue #20289: cgi.FieldStorage() now supports the context management
  protocol.

2182 2183 2184
- Issue #13128: Print response headers for CONNECT requests when debuglevel
  > 0. Patch by Demian Brecht.

2185 2186
- Issue #15381: Optimized io.BytesIO to make less allocations and copyings.

2187 2188 2189 2190
- Issue #22818: Splitting on a pattern that could match an empty string now
  raises a warning.  Patterns that can only match empty strings are now
  rejected.

2191 2192 2193
- Issue #23099: Closing io.BytesIO with exported buffer is rejected now to
  prevent corrupting exported buffer.

2194 2195 2196
- Issue #23326: Removed __ne__ implementations.  Since fixing default __ne__
  implementation in issue #21408 they are redundant.

2197
- Issue #23363: Fix possible overflow in itertools.permutations.
2198

2199
- Issue #23364: Fix possible overflow in itertools.product.
2200

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2201
- Issue #23366: Fixed possible integer overflow in itertools.combinations.
2202

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Benjamin Peterson committed
2203 2204
- Issue #23369: Fixed possible integer overflow in
  _json.encode_basestring_ascii.
2205

2206 2207 2208 2209 2210 2211
- Issue #23353: Fix the exception handling of generators in
  PyEval_EvalFrameEx(). At entry, save or swap the exception state even if
  PyEval_EvalFrameEx() is called with throwflag=0. At exit, the exception state
  is now always restored or swapped, not only if why is WHY_YIELD or
  WHY_RETURN. Patch co-written with Antoine Pitrou.

2212 2213 2214
- Issue #14099: Restored support of writing ZIP files to tellable but
  non-seekable streams.

2215 2216 2217
- Issue #14099: Writing to ZipFile and reading multiple ZipExtFiles is
  threadsafe now.

2218 2219
- Issue #19361: JSON decoder now raises JSONDecodeError instead of ValueError.

2220 2221 2222
- Issue #18518: timeit now rejects statements which can't be compiled outside
  a function or a loop (e.g. "return" or "break").

2223 2224
- Issue #23094: Fixed readline with frames in Python implementation of pickle.

2225 2226
- Issue #23268: Fixed bugs in the comparison of ipaddress classes.

2227 2228 2229 2230
- Issue #21408: Removed incorrect implementations of __ne__() which didn't
  returned NotImplemented if __eq__() returned NotImplemented.  The default
  __ne__() now works correctly.

2231
- Issue #19996: :class:`email.feedparser.FeedParser` now handles (malformed)
2232
  headers with no key rather than assuming the body has started.
2233

2234 2235 2236
- Issue #20188: Support Application-Layer Protocol Negotiation (ALPN) in the ssl
  module.

2237 2238 2239
- Issue #23133: Pickling of ipaddress objects now produces more compact and
  portable representation.

2240 2241
- Issue #23248: Update ssl error codes from latest OpenSSL git master.

2242 2243 2244
- Issue #23266: Much faster implementation of ipaddress.collapse_addresses()
  when there are many non-consecutive addresses.

2245 2246
- Issue #23098: 64-bit dev_t is now supported in the os module.

2247 2248 2249 2250
- Issue #21817: When an exception is raised in a task submitted to a
  ProcessPoolExecutor, the remote traceback is now displayed in the
  parent process.  Patch by Claudiu Popa.

2251 2252 2253
- Issue #15955: Add an option to limit output size when decompressing LZMA
  data.  Patch by Nikolaus Rath and Martin Panter.

2254 2255 2256
- Issue #23250: In the http.cookies module, capitalize "HttpOnly" and "Secure"
  as they are written in the standard.

2257 2258 2259
- Issue #23063: In the disutils' check command, fix parsing of reST with code or
  code-block directives.

2260 2261 2262 2263
- Issue #23209, #23225: selectors.BaseSelector.get_key() now raises a
  RuntimeError if the selector is closed. And selectors.BaseSelector.close()
  now clears its internal reference to the selector mapping to break a
  reference cycle. Initial patch written by Martin Richard.
2264

2265 2266 2267 2268 2269 2270 2271
- Issue #17911: Provide a way to seed the linecache for a PEP-302 module
  without actually loading the code.

- Issue #17911: Provide a new object API for traceback, including the ability
  to not lookup lines at all until the traceback is actually rendered, without
  any trace of the original objects being kept alive.

2272 2273 2274
- Issue #19777: Provide a home() classmethod on Path objects.  Contributed
  by Victor Salgado and Mayank Tripathi.

2275 2276 2277
- Issue #23206: Make ``json.dumps(..., ensure_ascii=False)`` as fast as the
  default case of ``ensure_ascii=True``.  Patch by Naoki Inada.

2278 2279
- Issue #23185: Add math.inf and math.nan constants.

2280 2281 2282 2283
- Issue #23186: Add ssl.SSLObject.shared_ciphers() and
  ssl.SSLSocket.shared_ciphers() to fetch the client's list ciphers sent at
  handshake.

2284 2285
- Issue #23143: Remove compatibility with OpenSSLs older than 0.9.8.

2286 2287 2288
- Issue #23132: Improve performance and introspection support of comparison
  methods created by functool.total_ordering.

2289
- Issue #19776: Add an expanduser() method on Path objects.
2290

2291 2292 2293
- Issue #23112: Fix SimpleHTTPServer to correctly carry the query string and
  fragment when it redirects to add a trailing slash.

2294 2295 2296
- Issue #21793: Added http.HTTPStatus enums (i.e. HTTPStatus.OK,
  HTTPStatus.NOT_FOUND).  Patch by Demian Brecht.

2297 2298 2299
- Issue #23093: In the io, module allow more operations to work on detached
  streams.

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2300 2301 2302
- Issue #23111: In the ftplib, make ssl.PROTOCOL_SSLv23 the default protocol
  version.

2303 2304 2305
- Issue #22585: On OpenBSD 5.6 and newer, os.urandom() now calls getentropy(),
  instead of reading /dev/urandom, to get pseudo-random bytes.

2306 2307
- Issue #19104: pprint now produces evaluable output for wrapped strings.

2308 2309
- Issue #23071: Added missing names to codecs.__all__.  Patch by Martin Panter.

2310 2311 2312
- Issue #22783: Pickling now uses the NEWOBJ opcode instead of the NEWOBJ_EX
  opcode if possible.

2313 2314 2315
- Issue #15513: Added a __sizeof__ implementation for pickle classes.

- Issue #19858: pickletools.optimize() now aware of the MEMOIZE opcode, can
2316 2317 2318
  produce more compact result and no longer produces invalid output if input
  data contains MEMOIZE opcodes together with PUT or BINPUT opcodes.

2319 2320 2321
- Issue #22095: Fixed HTTPConnection.set_tunnel with default port.  The port
  value in the host header was set to "None".  Patch by Demian Brecht.

2322 2323 2324
- Issue #23016: A warning no longer produces an AttributeError when the program
  is run with pythonw.exe.

2325 2326 2327 2328 2329 2330
- Issue #21775: shutil.copytree(): fix crash when copying to VFAT. An exception
  handler assumed that that OSError objects always have a 'winerror' attribute.
  That is not the case, so the exception handler itself raised AttributeError
  when run on Linux (and, presumably, any other non-Windows OS).
  Patch by Greg Ward.

2331 2332 2333
- Issue #1218234: Fix inspect.getsource() to load updated source of
  reloaded module. Initial patch by Berker Peksag.

2334
- Issue #21740: Support wrapped callables in doctest. Patch by Claudiu Popa.
2335

2336 2337 2338
- Issue #23009: Make sure selectors.EpollSelecrtor.select() works when no
  FD is registered.

2339 2340 2341
- Issue #22959: In the constructor of http.client.HTTPSConnection, prefer the
  context's check_hostname attribute over the *check_hostname* parameter.

2342 2343 2344
- Issue #22696: Add function :func:`sys.is_finalizing` to know about
  interpreter shutdown.

2345 2346 2347
- Issue #16043: Add a default limit for the amount of data xmlrpclib.gzip_decode
  will return. This resolves CVE-2013-1753.

2348 2349 2350 2351 2352
- Issue #14099: ZipFile.open() no longer reopen the underlying file.  Objects
  returned by ZipFile.open() can now operate independently of the ZipFile even
  if the ZipFile was created by passing in a file-like object as the first
  argument to the constructor.

2353 2354 2355 2356
- Issue #22966: Fix __pycache__ pyc file name clobber when pyc_compile is
  asked to compile a source file containing multiple dots in the source file
  name.

2357 2358
- Issue #21971: Update turtledemo doc and add module to the index.

2359 2360 2361
- Issue #21032. Fixed socket leak if HTTPConnection.getresponse() fails.
  Original patch by Martin Panter.

2362
- Issue #22407: Deprecated the use of re.LOCALE flag with str patterns or
2363 2364
  re.ASCII. It was newer worked.

2365 2366 2367
- Issue #22902: The "ip" command is now used on Linux to determine MAC address
  in uuid.getnode().  Pach by Bruno Cauet.

2368 2369
- Issue #22960: Add a context argument to xmlrpclib.ServerProxy constructor.

2370 2371
- Issue #22389: Add contextlib.redirect_stderr().

2372 2373 2374 2375
- Issue #21356: Make ssl.RAND_egd() optional to support LibreSSL. The
  availability of the function is checked during the compilation. Patch written
  by Bernard Spil.

2376 2377 2378
- Issue #22915: SAX parser now supports files opened with file descriptor or
  bytes path.

2379 2380 2381
- Issue #22609: Constructors and update methods of mapping classes in the
  collections module now accept the self keyword argument.

2382 2383
- Issue #22940: Add readline.append_history_file.

2384 2385
- Issue #19676: Added the "namereplace" error handler.

2386 2387
- Issue #22788: Add *context* parameter to logging.handlers.HTTPHandler.

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2388 2389 2390
- Issue #22921: Allow SSLContext to take the *hostname* parameter even if
  OpenSSL doesn't support SNI.

2391 2392 2393
- Issue #22894: TestCase.subTest() would cause the test suite to be stopped
  when in failfast mode, even in the absence of failures.

2394 2395 2396
- Issue #22796: HTTP cookie parsing is now stricter, in order to protect
  against potential injection attacks.

2397 2398
- Issue #22370: Windows detection in pathlib is now more robust.

2399 2400 2401
- Issue #22841: Reject coroutines in asyncio add_signal_handler().
  Patch by Ludovic.Gasc.

2402 2403 2404
- Issue #19494: Added urllib.request.HTTPBasicPriorAuthHandler. Patch by
  Matej Cepl.

2405 2406
- Issue #22578: Added attributes to the re.error class.

2407 2408
- Issue #22849: Fix possible double free in the io.TextIOWrapper constructor.

2409 2410 2411
- Issue #12728: Different Unicode characters having the same uppercase but
  different lowercase are now matched in case-insensitive regular expressions.

2412 2413 2414
- Issue #22821: Fixed fcntl() with integer argument on 64-bit big-endian
  platforms.

2415 2416
- Issue #21650: Add an `--sort-keys` option to json.tool CLI.

2417
- Issue #22824: Updated reprlib output format for sets to use set literals.
2418 2419
  Patch contributed by Berker Peksag.

2420
- Issue #22824: Updated reprlib output format for arrays to display empty
2421 2422
  arrays without an unnecessary empty list.  Suggested by Serhiy Storchaka.

2423 2424 2425
- Issue #22406: Fixed the uu_codec codec incorrectly ported to 3.x.
  Based on patch by Martin Panter.

2426 2427 2428
- Issue #17293: uuid.getnode() now determines MAC address on AIX using netstat.
  Based on patch by Aivars Kalvāns.

2429 2430
- Issue #22769: Fixed ttk.Treeview.tag_has() when called without arguments.

2431 2432
- Issue #22417: Verify certificates by default in httplib (PEP 476).

2433 2434 2435
- Issue #22775: Fixed unpickling of http.cookies.SimpleCookie with protocol 2
  and above.  Patch by Tim Graham.

2436 2437
- Issue #22776: Brought excluded code into the scope of a try block in
  SysLogHandler.emit().
2438

2439 2440 2441
- Issue #22665: Add missing get_terminal_size and SameFileError to
  shutil.__all__.

2442 2443 2444
- Issue #6623: Remove deprecated Netrc class in the ftplib module. Patch by
  Matt Chaput.

2445 2446 2447
- Issue #17381: Fixed handling of case-insensitive ranges in regular
  expressions.

2448 2449 2450
- Issue #22410: Module level functions in the re module now cache compiled
  locale-dependent regular expressions taking into account the locale.

2451 2452 2453
- Issue #22759: Query methods on pathlib.Path() (exists(), is_dir(), etc.)
  now return False when the underlying stat call raises NotADirectoryError.

2454 2455 2456 2457
- Issue #8876: distutils now falls back to copying files when hard linking
  doesn't work.  This allows use with special filesystems such as VirtualBox
  shared folders.

2458 2459
- Issue #22217: Implemented reprs of classes in the zipfile module.

2460 2461
- Issue #22457: Honour load_tests in the start_dir of discovery.

2462 2463 2464
- Issue #18216: gettext now raises an error when a .mo file has an
  unsupported major version number.  Patch by Aaron Hill.

2465 2466 2467 2468
- Issue #13918: Provide a locale.delocalize() function which can remove
  locale-specific number formatting from a string representing a number,
  without then converting it to a specific type.  Patch by Cédric Krier.

2469 2470 2471
- Issue #22676: Make the pickling of global objects which don't have a
  __module__ attribute less slow.

2472 2473
- Issue #18853: Fixed ResourceWarning in shlex.__nain__.

2474 2475 2476
- Issue #9351: Defaults set with set_defaults on an argparse subparser
  are no longer ignored when also set on the parent parser.

2477 2478 2479 2480
- Issue #7559: unittest test loading ImportErrors are reported as import errors
  with their import exception rather than as attribute errors after the import
  has already failed.

2481 2482 2483 2484
- Issue #19746: Make it possible to examine the errors from unittest
  discovery without executing the test suite. The new `errors` attribute
  on TestLoader exposes these non-fatal errors encountered during discovery.

2485 2486 2487 2488
- Issue #21991: Make email.headerregistry's header 'params' attributes
  be read-only (MappingProxyType).  Previously the dictionary was modifiable
  but a new one was created on each access of the attribute.

2489 2490 2491
- Issue #22638: SSLv3 is now disabled throughout the standard library.
  It can still be enabled by instantiating a SSLContext manually.

2492 2493 2494
- Issue #22641: In asyncio, the default SSL context for client connections
  is now created using ssl.create_default_context(), for stronger security.

2495 2496
- Issue #17401: Include closefd in io.FileIO repr.

2497 2498 2499 2500
- Issue #21338: Add silent mode for compileall. quiet parameters of
  compile_{dir, file, path} functions now have a multilevel value. Also,
  -q option of the CLI now have a multilevel value. Patch by Thomas Kluyver.

2501 2502
- Issue #20152: Convert the array and cmath modules to Argument Clinic.

2503 2504
- Issue #18643: Add socket.socketpair() on Windows.

2505 2506
- Issue #22435: Fix a file descriptor leak when SocketServer bind fails.

2507 2508 2509
- Issue #13096: Fixed segfault in CTypes POINTER handling of large
  values.

2510 2511 2512
- Issue #11694: Raise ConversionError in xdrlib as documented.  Patch
  by Filip Gruszczyński and Claudiu Popa.

2513 2514 2515
- Issue #19380: Optimized parsing of regular expressions.

- Issue #1519638: Now unmatched groups are replaced with empty strings in re.sub()
2516 2517 2518
  and re.subn().

- Issue #18615: sndhdr.what/whathdr now return a namedtuple.
2519

2520 2521 2522
- Issue #22462: Fix pyexpat's creation of a dummy frame to make it
  appear in exception tracebacks.

2523 2524 2525
- Issue #21965: Add support for in-memory SSL to the ssl module.  Patch
  by Geert Jansen.

2526 2527 2528
- Issue #21173: Fix len() on a WeakKeyDictionary when .clear() was called
  with an iterator alive.

2529 2530 2531
- Issue #11866: Eliminated race condition in the computation of names
  for new threads.

2532 2533 2534
- Issue #21905: Avoid RuntimeError in pickle.whichmodule() when sys.modules
  is mutated while iterating.  Patch by Olivier Grisel.

2535 2536 2537 2538
- Issue #11271: concurrent.futures.Executor.map() now takes a *chunksize*
  argument to allow batching of tasks in child processes and improve
  performance of ProcessPoolExecutor.  Patch by Dan O'Reilly.

2539 2540 2541
- Issue #21883: os.path.join() and os.path.relpath() now raise a TypeError with
  more helpful error message for unsupported or mismatched types of arguments.

2542 2543 2544
- Issue #22219: The zipfile module CLI now adds entries for directories
  (including empty directories) in ZIP file.

Benjamin Peterson's avatar
Benjamin Peterson committed
2545
- Issue #22449: In the ssl.SSLContext.load_default_certs, consult the
2546
  environmental variables SSL_CERT_DIR and SSL_CERT_FILE on Windows.
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Benjamin Peterson committed
2547

2548 2549 2550 2551
- Issue #22508: The email.__version__ variable has been removed; the email
  code is no longer shipped separately from the stdlib, and __version__
  hasn't been updated in several releases.

2552 2553
- Issue #20076: Added non derived UTF-8 aliases to locale aliases table.

2554 2555
- Issue #20079: Added locales supported in glibc 2.18 to locale alias table.

2556 2557 2558
- Issue #20218: Added convenience methods read_text/write_text and read_bytes/
  write_bytes to pathlib.Path objects.

2559 2560 2561
- Issue #22437: Number of capturing groups in regular expression is no longer
  limited by 100.

2562 2563 2564
- Issue #17442: InteractiveInterpreter now displays the full chained traceback
  in its showtraceback method, to match the built in interactive interpreter.

2565
- Issue #23392: Added tests for marshal C API that works with FILE*.
2566

2567

2568 2569 2570
- Issue #10510: distutils register and upload methods now use HTML standards
  compliant CRLF line endings.

2571 2572 2573
- Issue #9850: Fixed macpath.join() for empty first component.  Patch by
  Oleg Oshmyan.

2574 2575 2576
- Issue #5309: distutils' build and build_ext commands now accept a ``-j``
  option to enable parallel building of extension modules.

2577 2578 2579
- Issue #22448: Improve canceled timer handles cleanup to prevent
  unbound memory usage. Patch by Joshua Moore-Oliva.

2580 2581 2582
- Issue #22427: TemporaryDirectory no longer attempts to clean up twice when
  used in the with statement in generator.

2583 2584 2585
- Issue #22362: Forbidden ambiguous octal escapes out of range 0-0o377 in
  regular expressions.

2586 2587 2588
- Issue #20912: Now directories added to ZIP file have correct Unix and MS-DOS
  directory attributes.

2589 2590 2591
- Issue #21866: ZipFile.close() no longer writes ZIP64 central directory
  records if allowZip64 is false.

2592 2593 2594
- Issue #22278: Fix urljoin problem with relative urls, a regression observed
  after changes to issue22118 were submitted.

2595 2596
- Issue #22415: Fixed debugging output of the GROUPREF_EXISTS opcode in the re
  module.  Removed trailing spaces in debugging output.
2597

2598 2599 2600
- Issue #22423: Unhandled exception in thread no longer causes unhandled
  AttributeError when sys.stderr is None.

2601 2602 2603
- Issue #21332: Ensure that ``bufsize=1`` in subprocess.Popen() selects
  line buffering, rather than block buffering.  Patch by Akira Li.

2604
- Issue #21091: Fix API bug: email.message.EmailMessage.is_attachment is now
2605
  a method.
2606

2607 2608 2609
- Issue #21079: Fix email.message.EmailMessage.is_attachment to return the
  correct result when the header has parameters as well as a value.

2610 2611
- Issue #22247: Add NNTPError to nntplib.__all__.

2612 2613 2614 2615
- Issue #22366: urllib.request.urlopen will accept a context object
  (SSLContext) as an argument which will then used be for HTTPS connection.
  Patch by Alex Gaynor.

2616 2617 2618
- Issue #4180: The warnings registries are now reset when the filters
  are modified.

2619 2620 2621 2622
- Issue #22419: Limit the length of incoming HTTP request in wsgiref server to
  65536 bytes and send a 414 error code for higher lengths. Patch contributed
  by Devin Cook.

2623 2624 2625 2626
- Lax cookie parsing in http.cookies could be a security issue when combined
  with non-standard cookie handling in some Web browsers.  Reported by
  Sergey Bobrov.

2627 2628 2629
- Issue #20537: logging methods now accept an exception instance as well as a
  Boolean value or exception tuple. Thanks to Yury Selivanov for the patch.

2630 2631 2632
- Issue #22384: An exception in Tkinter callback no longer crashes the program
  when it is run with pythonw.exe.

2633 2634
- Issue #22168: Prevent turtle AttributeError with non-default Canvas on OS X.

2635 2636 2637
- Issue #21147: sqlite3 now raises an exception if the request contains a null
  character instead of truncate it.  Based on patch by Victor Stinner.

2638 2639 2640
- Issue #13968: The glob module now supports recursive search in
  subdirectories using the "**" pattern.

2641 2642 2643
- Issue #21951: Fixed a crash in Tkinter on AIX when called Tcl command with
  empty string or tuple argument.

2644 2645 2646
- Issue #21951: Tkinter now most likely raises MemoryError instead of crash
  if the memory allocation fails.

2647 2648
- Issue #22338: Fix a crash in the json module on memory allocation failure.

2649
- Issue #12410: imaplib.IMAP4 now supports the context management protocol.
2650 2651
  Original patch by Tarek Ziadé.

2652 2653 2654
- Issue #21270: We now override tuple methods in mock.call objects so that
  they can be used as normal call attributes.

2655 2656 2657 2658 2659 2660
- Issue #16662: load_tests() is now unconditionally run when it is present in
  a package's __init__.py.  TestLoader.loadTestsFromModule() still accepts
  use_load_tests, but it is deprecated and ignored.  A new keyword-only
  attribute `pattern` is added and documented.  Patch given by Robert Collins,
  tweaked by Barry Warsaw.

2661 2662 2663
- Issue #22226: First letter no longer is stripped from the "status" key in
  the result of Treeview.heading().

2664 2665 2666
- Issue #19524: Fixed resource leak in the HTTP connection when an invalid
  response is received.  Patch by Martin Panter.

2667 2668 2669
- Issue #20421: Add a .version() method to SSL sockets exposing the actual
  protocol version in use.

2670 2671 2672 2673
- Issue #19546: configparser exceptions no longer expose implementation details.
  Chained KeyErrors are removed, which leads to cleaner tracebacks.  Patch by
  Claudiu Popa.

Terry Jan Reedy's avatar
Terry Jan Reedy committed
2674 2675 2676 2677 2678 2679 2680 2681
- Issue #22051: turtledemo no longer reloads examples to re-run them.
  Initialization of variables and gui setup should be done in main(),
  which is called each time a demo is run, but not on import.

- Issue #21933: Turtledemo users can change the code font size with a menu
  selection or control(command) '-' or '+' or control-mousewheel.
  Original patch by Lita Cho.

2682
- Issue #21597: The separator between the turtledemo text pane and the drawing
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2683 2684 2685 2686 2687
  canvas can now be grabbed and dragged with a mouse.  The code text pane can
  be widened to easily view or copy the full width of the text.  The canvas
  can be widened on small screens.  Original patches by Jan Kanis and Lita Cho.

- Issue #18132: Turtledemo buttons no longer disappear when the window is
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Terry Jan Reedy committed
2688 2689
  shrunk.  Original patches by Jan Kanis and Lita Cho.

2690 2691 2692 2693 2694
- Issue #22043: time.monotonic() is now always available.
  ``threading.Lock.acquire()``, ``threading.RLock.acquire()`` and socket
  operations now use a monotonic clock, instead of the system clock, when a
  timeout is used.

2695 2696 2697
- Issue #21527: Add a default number of workers to ThreadPoolExecutor equal
  to 5 times the number of CPUs.  Patch by Claudiu Popa.

2698 2699 2700 2701
- Issue #22216: smtplib now resets its state more completely after a quit.  The
  most obvious consequence of the previous behavior was a STARTTLS failure
  during a connect/starttls/quit/connect/starttls sequence.

2702 2703 2704 2705
- Issue #22098: ctypes' BigEndianStructure and LittleEndianStructure now
  define an empty __slots__ so that subclasses don't always get an instance
  dict.  Patch by Claudiu Popa.

2706 2707 2708 2709
- Issue #22185: Fix an occasional RuntimeError in threading.Condition.wait()
  caused by mutation of the waiters queue without holding the lock.  Patch
  by Doug Zongker.

2710 2711 2712 2713 2714
- Issue #22287: On UNIX, _PyTime_gettimeofday() now uses
  clock_gettime(CLOCK_REALTIME) if available. As a side effect, Python now
  depends on the librt library on Solaris and on Linux (only with glibc older
  than 2.17).

2715 2716 2717
- Issue #22182: Use e.args to unpack exceptions correctly in
  distutils.file_util.move_file. Patch by Claudiu Popa.

2718 2719 2720
- The webbrowser module now uses subprocess's start_new_session=True rather
  than a potentially risky preexec_fn=os.setsid call.

2721 2722 2723
- Issue #22042: signal.set_wakeup_fd(fd) now raises an exception if the file
  descriptor is in blocking mode.

2724 2725 2726
- Issue #16808: inspect.stack() now returns a named tuple instead of a tuple.
  Patch by Daniel Shahaf.

2727 2728
- Issue #22236: Fixed Tkinter images copying operations in NoDefaultRoot mode.

2729 2730 2731 2732
- Issue #2527: Add a *globals* argument to timeit functions, in order to
  override the globals namespace in which the timed code is executed.
  Patch by Ben Roberts.

2733 2734 2735 2736
- Issue #22118: Switch urllib.parse to use RFC 3986 semantics for the
  resolution of relative URLs, rather than RFCs 1808 and 2396.
  Patch by Demian Brecht.

2737 2738
- Issue #21549: Added the "members" parameter to TarFile.list().

2739 2740 2741
- Issue #19628: Allow compileall recursion depth to be specified with a -r
  option.

2742 2743
- Issue #15696: Add a __sizeof__ implementation for mmap objects on Windows.

2744 2745
- Issue #22068: Avoided reference loops with Variables and Fonts in Tkinter.

2746 2747
- Issue #22165: SimpleHTTPRequestHandler now supports undecodable file names.

2748 2749
- Issue #15381: Optimized line reading in io.BytesIO.

2750 2751 2752
- Issue #8797: Raise HTTPError on failed Basic Authentication immediately.
  Initial patch by Sam Bull.

2753 2754 2755
- Issue #20729: Restored the use of lazy iterkeys()/itervalues()/iteritems()
  in the mailbox module.

2756 2757 2758
- Issue #21448: Changed FeedParser feed() to avoid O(N**2) behavior when
  parsing long line.  Original patch by Raymond Hettinger.

2759
- Issue #22184: The functools LRU Cache decorator factory now gives an earlier
2760 2761
  and clearer error message when the user forgets the required parameters.

2762 2763 2764
- Issue #17923: glob() patterns ending with a slash no longer match non-dirs on
  AIX.  Based on patch by Delhallt.

2765 2766
- Issue #21725: Added support for RFC 6531 (SMTPUTF8) in smtpd.

2767 2768 2769 2770
- Issue #22176: Update the ctypes module's libffi to v3.1.  This release
  adds support for the Linux AArch64 and POWERPC ELF ABIv2 little endian
  architectures.

2771 2772
- Issue #5411: Added support for the "xztar" format in the shutil module.

2773 2774 2775
- Issue #21121: Don't force 3rd party C extensions to be built with
  -Werror=declaration-after-statement.

2776 2777 2778 2779
- Issue #21975: Fixed crash when using uninitialized sqlite3.Row (in particular
  when unpickling pickled sqlite3.Row).  sqlite3.Row is now initialized in the
  __new__() method.

2780 2781
- Issue #20170: Convert posixmodule to use Argument Clinic.

2782
- Issue #21539: Add an *exists_ok* argument to `Pathlib.mkdir()` to mimic
2783 2784 2785
  `mkdir -p` and `os.makedirs()` functionality.  When true, ignore
  FileExistsErrors.  Patch by Berker Peksag.

2786 2787 2788
- Issue #22127: Bypass IDNA for pure-ASCII host names in the socket module
  (in particular for numeric IPs).

2789 2790 2791
- Issue #21047: set the default value for the *convert_charrefs* argument
  of HTMLParser to True.  Patch by Berker Peksag.

2792 2793
- Add an __all__ to html.entities.

2794 2795 2796
- Issue #15114: the strict mode and argument of HTMLParser, HTMLParser.error,
  and the HTMLParserError exception have been removed.

2797 2798
- Issue #22085: Dropped support of Tk 8.3 in Tkinter.

2799 2800 2801
- Issue #21580: Now Tkinter correctly handles bytes arguments passed to Tk.
  In particular this allows to initialize images from binary data.

2802 2803 2804 2805
- Issue #22003: When initialized from a bytes object, io.BytesIO() now
  defers making a copy until it is mutated, improving performance and
  memory use on some use cases.  Patch by David Wilson.

2806 2807 2808
- Issue #22018: On Windows, signal.set_wakeup_fd() now also supports sockets.
  A side effect is that Python depends to the WinSock library.

2809 2810 2811 2812
- Issue #22054: Add os.get_blocking() and os.set_blocking() functions to get
  and set the blocking mode of a file descriptor (False if the O_NONBLOCK flag
  is set, True otherwise). These functions are not available on Windows.

Ned Deily's avatar
Ned Deily committed
2813 2814
- Issue #17172: Make turtledemo start as active on OS X even when run with
  subprocess.  Patch by Lita Cho.
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2815

2816 2817 2818
- Issue #21704: Fix build error for _multiprocessing when semaphores
  are not available.  Patch by Arfrever Frehtes Taifersar Arahesis.

2819 2820 2821
- Issue #20173: Convert sha1, sha256, sha512 and md5 to ArgumentClinic.
  Patch by Vajrasky Kok.

2822 2823 2824
- Fix repr(_socket.socket) on Windows 64-bit: don't fail with OverflowError
  on closed socket. repr(socket.socket) already works fine.

2825 2826 2827
- Issue #22033: Reprs of most Python implemened classes now contain actual
  class name instead of hardcoded one.

2828 2829 2830
- Issue #21947: The dis module can now disassemble generator-iterator
  objects based on their gi_code attribute. Patch by Clement Rouault.

2831 2832 2833
- Issue #16133: The asynchat.async_chat.handle_read() method now ignores
  BlockingIOError exceptions.

2834 2835 2836
- Issue #22044: Fixed premature DECREF in call_tzinfo_method.
  Patch by Tom Flanagan.

2837
- Issue #19884: readline: Disable the meta modifier key if stdout is not
2838
  a terminal to not write the ANSI sequence ``"\033[1034h"`` into stdout. This
2839 2840 2841
  sequence is used on some terminal (ex: TERM=xterm-256color") to enable
  support of 8 bit characters.

2842 2843 2844
- Issue #4350: Removed a number of out-of-dated and non-working for a long time
  Tkinter methods.

2845 2846 2847 2848
- Issue #6167: Scrollbar.activate() now returns the name of active element if
  the argument is not specified.  Scrollbar.set() now always accepts only 2
  arguments.

2849 2850
- Issue #15275: Clean up and speed up the ntpath module.

2851 2852 2853
- Issue #21888: plistlib's load() and loads() now work if the fmt parameter is
  specified.

2854 2855 2856
- Issue #22032: __qualname__ instead of __name__ is now always used to format
  fully qualified class names of Python implemented classes.

2857 2858 2859
- Issue #22031: Reprs now always use hexadecimal format with the "0x" prefix
  when contain an id in form " at 0x...".

2860 2861 2862
- Issue #22018: signal.set_wakeup_fd() now raises an OSError instead of a
  ValueError on ``fstat()`` failure.

Benjamin Peterson's avatar
add #  
Benjamin Peterson committed
2863
- Issue #21044: tarfile.open() now handles fileobj with an integer 'name'
2864
  attribute.  Based on patch by Antoine Pietri.
2865

2866 2867
- Issue #21966: Respect -q command-line option when code module is ran.

2868 2869
- Issue #19076: Don't pass the redundant 'file' argument to self.error().

2870 2871 2872
- Issue #16382: Improve exception message of warnings.warn() for bad
  category. Initial patch by Phil Elson.

2873 2874 2875 2876 2877
- Issue #21932: os.read() now uses a :c:func:`Py_ssize_t` type instead of
  :c:type:`int` for the size to support reading more than 2 GB at once. On
  Windows, the size is truncted to INT_MAX. As any call to os.read(), the OS
  may read less bytes than the number of requested bytes.

2878 2879
- Issue #21942: Fixed source file viewing in pydoc's server mode on Windows.

2880 2881 2882
- Issue #11259: asynchat.async_chat().set_terminator() now raises a ValueError
  if the number of received bytes is negative.

2883 2884 2885
- Issue #12523: asynchat.async_chat.push() now raises a TypeError if it doesn't
  get a bytes string

2886 2887 2888
- Issue #21707: Add missing kwonlyargcount argument to
  ModuleFinder.replace_paths_in_code().

2889 2890 2891
- Issue #20639: calling Path.with_suffix('') allows removing the suffix
  again.  Patch by July Tikhonov.

2892 2893 2894
- Issue #21714: Disallow the construction of invalid paths using
  Path.with_name().  Original patch by Antony Lee.

2895 2896 2897
- Issue #15014: Added 'auth' method to smtplib to make implementing auth
  mechanisms simpler, and used it internally in the login method.

2898 2899 2900
- Issue #21151: Fixed a segfault in the winreg module when ``None`` is passed
  as a ``REG_BINARY`` value to SetValueEx.  Patch by John Ehresman.

2901 2902 2903
- Issue #21090: io.FileIO.readall() does not ignore I/O errors anymore. Before,
  it ignored I/O errors if at least the first C call read() succeed.

2904 2905 2906
- Issue #5800: headers parameter of wsgiref.headers.Headers is now optional.
  Initial patch by Pablo Torres Navarrete and SilentGhost.

2907 2908
- Issue #21781: ssl.RAND_add() now supports strings longer than 2 GB.

2909 2910 2911
- Issue #21679: Prevent extraneous fstat() calls during open().  Patch by
  Bohuslav Kabrda.

2912 2913 2914
- Issue #21863: cProfile now displays the module name of C extension functions,
  in addition to their own name.

2915 2916 2917 2918
- Issue #11453: asyncore: emit a ResourceWarning when an unclosed file_wrapper
  object is destroyed. The destructor now closes the file if needed. The
  close() method can now be called twice: the second call does nothing.

2919 2920
- Issue #21858: Better handling of Python exceptions in the sqlite3 module.

2921 2922 2923
- Issue #21476: Make sure the email.parser.BytesParser TextIOWrapper is
  discarded after parsing, so the input file isn't unexpectedly closed.

2924 2925
- Issue #20295: imghdr now recognizes OpenEXR format images.

2926 2927 2928
- Issue #21729: Used the "with" statement in the dbm.dumb module to ensure
  files closing.  Patch by Claudiu Popa.

2929 2930
- Issue #21491: socketserver: Fix a race condition in child processes reaping.

2931 2932 2933
- Issue #21719: Added the ``st_file_attributes`` field to os.stat_result on
  Windows.

2934
- Issue #21832: Require named tuple inputs to be exact strings.
2935

2936 2937 2938
- Issue #21722: The distutils "upload" command now exits with a non-zero
  return code when uploading fails.  Patch by Martin Dengler.

2939 2940 2941
- Issue #21723: asyncio.Queue: support any type of number (ex: float) for the
  maximum size. Patch written by Vajrasky Kok.

2942 2943 2944 2945
- Issue #21711: support for "site-python" directories has now been removed
  from the site module (it was deprecated in 3.4).

- Issue #17552: new socket.sendfile() method allowing to send a file over a
2946 2947 2948
  socket by using high-performance os.sendfile() on UNIX.
  Patch by Giampaolo Rodola'.

2949 2950 2951
- Issue #18039: dbm.dump.open() now always creates a new database when the
  flag has the value 'n'.  Patch by Claudiu Popa.

2952 2953 2954 2955
- Issue #21326: Add a new is_closed() method to asyncio.BaseEventLoop.
  run_forever() and run_until_complete() methods of asyncio.BaseEventLoop now
  raise an exception if the event loop was closed.

2956 2957 2958
- Issue #21766: Prevent a security hole in CGIHTTPServer by URL unquoting paths
  before checking for a CGI script at that path.

2959 2960
- Issue #21310: Fixed possible resource leak in failed open().

2961 2962 2963
- Issue #21256: Printout of keyword args should be in deterministic order in
  a mock function call. This will help to write better doctests.

2964 2965
- Issue #21677: Fixed chaining nonnormalized exceptions in io close() methods.

2966 2967 2968
- Issue #11709: Fix the pydoc.help function to not fail when sys.stdin is not a
  valid file.

2969 2970
- Issue #21515: tempfile.TemporaryFile now uses os.O_TMPFILE flag is available.

2971 2972 2973
- Issue #13223: Fix pydoc.writedoc so that the HTML documentation for methods
  that use 'self' in the example code is generated correctly.

Benjamin Peterson's avatar
Benjamin Peterson committed
2974
- Issue #21463: In urllib.request, fix pruning of the FTP cache.
2975

2976 2977 2978 2979 2980
- Issue #21618: The subprocess module could fail to close open fds that were
  inherited by the calling process and already higher than POSIX resource
  limits would otherwise allow.  On systems with a functioning /proc/self/fd
  or /dev/fd interface the max is now ignored and all fds are closed.

2981 2982 2983
- Issue #20383: Introduce importlib.util.module_from_spec() as the preferred way
  to create a new module.

2984 2985
- Issue #21552: Fixed possible integer overflow of too long string lengths in
  the tkinter module on 64-bit platforms.
2986

2987 2988 2989 2990
- Issue #14315: The zipfile module now ignores extra fields in the central
  directory that are too short to be parsed instead of letting a struct.unpack
  error bubble up as this "bad data" appears in many real world zip files in
  the wild and is ignored by other zip tools.
2991

2992
- Issue #13742: Added "key" and "reverse" parameters to heapq.merge().
2993 2994
  (First draft of patch contributed by Simon Sapin.)

2995
- Issue #21402: tkinter.ttk now works when default root window is not set.
2996

2997 2998 2999
- Issue #3015: _tkinter.create() now creates tkapp object with wantobject=1 by
  default.

3000
- Issue #10203: sqlite3.Row now truly supports sequence protocol.  In particular
3001
  it supports reverse() and negative indices.  Original patch by Claudiu Popa.
3002

3003 3004 3005 3006
- Issue #18807: If copying (no symlinks) specified for a venv, then the python
  interpreter aliases (python, python3) are now created by copying rather than
  symlinking.

3007 3008 3009
- Issue #20197: Added support for the WebP image type in the imghdr module.
  Patch by Fabrice Aneche and Claudiu Popa.

3010 3011 3012
- Issue #21513: Speedup some properties of IP addresses (IPv4Address,
  IPv6Address) such as .is_private or .is_multicast.

3013 3014 3015
- Issue #21137: Improve the repr for threading.Lock() and its variants
  by showing the "locked" or "unlocked" status.  Patch by Berker Peksag.

3016 3017 3018
- Issue #21538: The plistlib module now supports loading of binary plist files
  when reference or offset size is not a power of two.

3019 3020
- Issue #21455: Add a default backlog to socket.listen().

3021 3022
- Issue #21525: Most Tkinter methods which accepted tuples now accept lists too.

3023
- Issue #22166: With the assistance of a new internal _codecs._forget_codec
3024 3025
  helping function, test_codecs now clears the encoding caches to avoid the
  appearance of a reference leak
3026

3027 3028
- Issue #22236: Tkinter tests now don't reuse default root window.  New root
  window is created for every test class.
3029

Benjamin Peterson's avatar
Benjamin Peterson committed
3030 3031 3032
- Issue #10744: Fix PEP 3118 format strings on ctypes objects with a nontrivial
  shape.

3033 3034
- Issue #20826: Optimize ipaddress.collapse_addresses().

3035 3036 3037
- Issue #21487: Optimize ipaddress.summarize_address_range() and
  ipaddress.{IPv4Network,IPv6Network}.subnets().

3038 3039 3040
- Issue #21486: Optimize parsing of netmasks in ipaddress.IPv4Network and
  ipaddress.IPv6Network.

3041
- Issue #13916: Disallowed the surrogatepass error handler for non UTF-\*
3042 3043
  encodings.

3044 3045 3046
- Issue #20998: Fixed re.fullmatch() of repeated single character pattern
  with ignore case.  Original patch by Matthew Barnett.

3047 3048 3049
- Issue #21075: fileinput.FileInput now reads bytes from standard stream if
  binary mode is specified.  Patch by Sam Kimbrel.

3050 3051 3052
- Issue #19775: Add a samefile() method to pathlib Path objects.  Initial
  patch by Vajrasky Kok.

3053 3054 3055
- Issue #21226: Set up modules properly in PyImport_ExecCodeModuleObject
  (and friends).

3056 3057 3058
- Issue #21398: Fix an unicode error in the pydoc pager when the documentation
  contains characters not encodable to the stdout encoding.

3059 3060 3061 3062
- Issue #16531: ipaddress.IPv4Network and ipaddress.IPv6Network now accept
  an (address, netmask) tuple argument, so as to easily construct network
  objects from existing addresses.

3063 3064 3065
- Issue #21156: importlib.abc.InspectLoader.source_to_code() is now a
  staticmethod.

3066 3067
- Issue #21424: Simplified and optimized heaqp.nlargest() and nmsmallest()
  to make fewer tuple comparisons.
3068

3069 3070 3071
- Issue #21396: Fix TextIOWrapper(..., write_through=True) to not force a
  flush() on the underlying binary stream.  Patch by akira.

Tim Golden's avatar
Tim Golden committed
3072 3073
- Issue #18314: Unlink now removes junctions on Windows. Patch by Kim Gräsman

3074 3075 3076
- Issue #21088: Bugfix for curses.window.addch() regression in 3.4.0.
  In porting to Argument Clinic, the first two arguments were reversed.

3077 3078
- Issue #21407: _decimal: The module now supports function signatures.

3079 3080 3081 3082
- Issue #10650: Remove the non-standard 'watchexp' parameter from the
  Decimal.quantize() method in the Python version.  It had never been
  present in the C version.

3083
- Issue #21469: Reduced the risk of false positives in robotparser by
3084 3085 3086
  checking to make sure that robots.txt has been read or does not exist
  prior to returning True in can_fetch().

3087 3088 3089
- Issue #19414: Have the OrderedDict mark deleted links as unusable.
  This gives an early failure if the link is deleted during iteration.

3090 3091 3092
- Issue #21421: Add __slots__ to the MappingViews ABC.
  Patch by Josh Rosenberg.

3093 3094 3095
- Issue #21101: Eliminate double hashing in the C speed-up code for
  collections.Counter().

3096 3097 3098
- Issue #21321: itertools.islice() now releases the reference to the source
  iterator when the slice is exhausted.  Patch by Anton Afanasyev.

3099 3100 3101 3102
- Issue #21057: TextIOWrapper now allows the underlying binary stream's
  read() or read1() method to return an arbitrary bytes-like object
  (such as a memoryview).  Patch by Nikolaus Rath.

3103 3104 3105 3106
- Issue #20951: SSLSocket.send() now raises either SSLWantReadError or
  SSLWantWriteError on a non-blocking socket if the operation would block.
  Previously, it would return 0.  Patch by Nikolaus Rath.

3107 3108 3109
- Issue #13248: removed previously deprecated asyncore.dispatcher __getattr__
  cheap inheritance hack.

3110 3111 3112
- Issue #9815: assertRaises now tries to clear references to local variables
  in the exception's traceback.

3113 3114 3115 3116
- Issue #19940: ssl.cert_time_to_seconds() now interprets the given time
  string in the UTC timezone (as specified in RFC 5280), not the local
  timezone.

3117 3118 3119
- Issue #13204: Calling sys.flags.__new__ would crash the interpreter,
  now it raises a TypeError.

3120 3121 3122
- Issue #19385: Make operations on a closed dbm.dumb database always raise the
  same exception.

3123 3124 3125
- Issue #21207: Detect when the os.urandom cached fd has been closed or
  replaced, and open it anew.

3126 3127 3128 3129
- Issue #21291: subprocess's Popen.wait() is now thread safe so that
  multiple threads may be calling wait() or poll() on a Popen instance
  at the same time without losing the Popen.returncode value.

3130
- Issue #21127: Path objects can now be instantiated from str subclass
3131
  instances (such as ``numpy.str_``).
3132

Senthil Kumaran's avatar
Senthil Kumaran committed
3133 3134 3135 3136
- Issue #15002: urllib.response object to use _TemporaryFileWrapper (and
  _TemporaryFileCloser) facility. Provides a better way to handle file
  descriptor close. Patch contributed by Christian Theune.

3137 3138 3139
- Issue #12220: mindom now raises a custom ValueError indicating it doesn't
  support spaces in URIs instead of letting a 'split' ValueError bubble up.

3140 3141
- Issue #21068: The ssl.PROTOCOL* constants are now enum members.

3142 3143
- Issue #21276: posixmodule: Don't define USE_XATTRS on KFreeBSD and the Hurd.

3144 3145 3146
- Issue #21262: New method assert_not_called for Mock.
  It raises AssertionError if the mock has been called.

3147 3148 3149
- Issue #21238: New keyword argument `unsafe` to Mock. It raises
  `AttributeError` incase of an attribute startswith assert or assret.

3150 3151 3152
- Issue #20896: ssl.get_server_certificate() now uses PROTOCOL_SSLv23, not
  PROTOCOL_SSLv3, for maximum compatibility.

3153 3154 3155
- Issue #21239: patch.stopall() didn't work deterministically when the same
  name was patched more than once.

3156 3157
- Issue #21203: Updated fileConfig and dictConfig to remove inconsistencies.
  Thanks to Jure Koren for the patch.
Michael Foord's avatar
Merge  
Michael Foord committed
3158

Kushal Das's avatar
Kushal Das committed
3159 3160
- Issue #21222: Passing name keyword argument to mock.create_autospec now
  works.
3161

3162 3163
- Issue #21197: Add lib64 -> lib symlink in venvs on 64-bit non-OS X POSIX.

3164 3165 3166 3167 3168
- Issue #17498: Some SMTP servers disconnect after certain errors, violating
  strict RFC conformance.  Instead of losing the error code when we issue the
  subsequent RSET, smtplib now returns the error code and defers raising the
  SMTPServerDisconnected error until the next command is issued.

3169 3170 3171
- Issue #17826: setting an iterable side_effect on a mock function created by
  create_autospec now works. Patch by Kushal Das.

3172
- Issue #7776: Fix ``Host:`` header and reconnection when using
3173 3174
  http.client.HTTPConnection.set_tunnel(). Patch by Nikolaus Rath.

3175 3176 3177
- Issue #20968: unittest.mock.MagicMock now supports division.
  Patch by Johannes Baiter.

Benjamin Peterson's avatar
Benjamin Peterson committed
3178 3179 3180
- Issue #21529 (CVE-2014-4616): Fix arbitrary memory access in
  JSONDecoder.raw_decode with a negative second parameter. Bug reported by Guido
  Vranken.
3181

3182 3183 3184 3185
- Issue #21169: getpass now handles non-ascii characters that the
  input stream encoding cannot encode by re-encoding using the
  replace error handler.

3186 3187 3188
- Issue #21171: Fixed undocumented filter API of the rot13 codec.
  Patch by Berker Peksag.

3189 3190 3191 3192
- Issue #20539: Improved math.factorial error message for large positive inputs
  and changed exception type (OverflowError -> ValueError) for large negative
  inputs.

3193 3194
- Issue #21172: isinstance check relaxed from dict to collections.Mapping.

3195 3196 3197
- Issue #21155: asyncio.EventLoop.create_unix_server() now raises a ValueError
  if path and sock are specified at the same time.

3198 3199 3200
- Issue #21136: Avoid unnecessary normalization of Fractions resulting from
  power and other operations.  Patch by Raymond Hettinger.

3201 3202
- Issue #17621: Introduce importlib.util.LazyLoader.

Giampaolo Rodola's avatar
Giampaolo Rodola committed
3203 3204 3205
- Issue #21076: signal module constants were turned into enums.
  Patch by Giampaolo Rodola'.

3206 3207
- Issue #20636: Improved the repr of Tkinter widgets.

3208 3209 3210
- Issue #19505: The items, keys, and values views of OrderedDict now support
  reverse iteration using reversed().

3211 3212 3213
- Issue #21149: Improved thread-safety in logging cleanup during interpreter
  shutdown. Thanks to Devin Jeanpierre for the patch.

3214 3215 3216 3217
- Issue #21058: Fix a leak of file descriptor in
  :func:`tempfile.NamedTemporaryFile`, close the file descriptor if
  :func:`io.open` fails

3218 3219
- Issue #21200: Return None from pkgutil.get_loader() when __spec__ is missing.

3220 3221 3222
- Issue #21013: Enhance ssl.create_default_context() when used for server side
  sockets to provide better security by default.

3223 3224 3225
- Issue #20145: `assertRaisesRegex` and `assertWarnsRegex` now raise a
  TypeError if the second argument is not a string or compiled regex.

3226 3227
- Issue #20633: Replace relative import by absolute import.

3228 3229
- Issue #20980: Stop wrapping exception when using ThreadPool.

3230 3231 3232
- Issue #21082: In os.makedirs, do not set the process-wide umask. Note this
  changes behavior of makedirs when exist_ok=True.

3233 3234
- Issue #20990: Fix issues found by pyflakes for multiprocessing.

3235 3236 3237 3238
- Issue #21015: SSL contexts will now automatically select an elliptic
  curve for ECDH key exchange on OpenSSL 1.0.2 and later, and otherwise
  default to "prime256v1".

3239 3240
- Issue #21000: Improve the command-line interface of json.tool.

3241 3242 3243
- Issue #20995: Enhance default ciphers used by the ssl module to enable
  better security an prioritize perfect forward secrecy.

3244 3245
- Issue #20884: Don't assume that __file__ is defined on importlib.__init__.

3246 3247
- Issue #21499: Ignore __builtins__ in several test_importlib.test_api tests.

3248 3249
- Issue #20627: xmlrpc.client.ServerProxy is now a context manager.

3250 3251 3252
- Issue #19165: The formatter module now raises DeprecationWarning instead of
  PendingDeprecationWarning.

3253 3254 3255
- Issue #13936: Remove the ability of datetime.time instances to be considered
  false in boolean contexts.

3256
- Issue #18931: selectors module now supports /dev/poll on Solaris.
3257 3258
  Patch by Giampaolo Rodola'.

3259 3260 3261 3262
- Issue #19977: When the ``LC_TYPE`` locale is the POSIX locale (``C`` locale),
  :py:data:`sys.stdin` and :py:data:`sys.stdout` are now using the
  ``surrogateescape`` error handler, instead of the ``strict`` error handler.

3263 3264 3265
- Issue #20574: Implement incremental decoder for cp65001 code (Windows code
  page 65001, Microsoft UTF-8).

3266 3267 3268 3269 3270
- Issue #20879: Delay the initialization of encoding and decoding tables for
  base32, ascii85 and base85 codecs in the base64 module, and delay the
  initialization of the unquote_to_bytes() table of the urllib.parse module, to
  not waste memory if these modules are not used.

3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298 3299
- Issue #19157: Include the broadcast address in the usuable hosts for IPv6
  in ipaddress.

- Issue #11599: When an external command (e.g. compiler) fails, distutils now
  prints out the whole command line (instead of just the command name) if the
  environment variable DISTUTILS_DEBUG is set.

- Issue #4931: distutils should not produce unhelpful "error: None" messages
  anymore.  distutils.util.grok_environment_error is kept but doc-deprecated.

- Issue #20875: Prevent possible gzip "'read' is not defined" NameError.
  Patch by Claudiu Popa.

- Issue #11558: ``email.message.Message.attach`` now returns a more
  useful error message if ``attach`` is called on a message for which
  ``is_multipart`` is False.

- Issue #20283: RE pattern methods now accept the string keyword parameters
  as documented.  The pattern and source keyword parameters are left as
  deprecated aliases.

- Issue #20778: Fix modulefinder to work with bytecode-only modules.

- Issue #20791: copy.copy() now doesn't make a copy when the input is
  a bytes object.  Initial patch by Peter Otten.

- Issue #19748: On AIX, time.mktime() now raises an OverflowError for year
  outsize range [1902; 2037].

3300 3301
- Issue #19573: inspect.signature: Use enum for parameter kind constants.

3302 3303
- Issue #20726: inspect.signature: Make Signature and Parameter picklable.

3304 3305
- Issue #17373: Add inspect.Signature.from_callable method.

3306 3307
- Issue #20378: Improve repr of inspect.Signature and inspect.Parameter.

3308 3309 3310
- Issue #20816: Fix inspect.getcallargs() to raise correct TypeError for
  missing keyword-only arguments. Patch by Jeremiah Lowin.

3311 3312 3313
- Issue #20817: Fix inspect.getcallargs() to fail correctly if more
  than 3 arguments are missing. Patch by Jeremiah Lowin.

3314 3315 3316 3317 3318
- Issue #6676: Ensure a meaningful exception is raised when attempting
  to parse more than one XML document per pyexpat xmlparser instance.
  (Original patches by Hirokazu Yamamoto and Amaury Forgeot d'Arc, with
  suggested wording by David Gutteridge)

3319 3320 3321 3322 3323
- Issue #21117: Fix inspect.signature to better support functools.partial.
  Due to the specifics of functools.partial implementation,
  positional-or-keyword arguments passed as keyword arguments become
  keyword-only.

3324
- Issue #20334: inspect.Signature and inspect.Parameter are now hashable.
3325
  Thanks to Antony Lee for bug reports and suggestions.
3326

3327 3328 3329
- Issue #15916: doctest.DocTestSuite returns an empty unittest.TestSuite instead
  of raising ValueError if it finds no tests

3330 3331 3332
- Issue #21209: Fix asyncio.tasks.CoroWrapper to workaround a bug
  in yield-from implementation in CPythons prior to 3.4.1.

3333 3334 3335
- asyncio: Add gi_{frame,running,code} properties to CoroWrapper
  (upstream issue #163).

3336 3337 3338
- Issue #21311: Avoid exception in _osx_support with non-standard compiler
  configurations.  Patch by John Szakmeister.

3339 3340 3341
- Issue #11571: Ensure that the turtle window becomes the topmost window
  when launched on OS X.

3342 3343
- Issue #21801: Validate that __signature__ is None or an instance of Signature.

Ned Deily's avatar
Ned Deily committed
3344 3345
- Issue #21923: Prevent AttributeError in distutils.sysconfig.customize_compiler
  due to possible uninitialized _config_vars.
3346

3347 3348 3349
- Issue #21323: Fix http.server to again handle scripts in CGI subdirectories,
  broken by the fix for security issue #19435.  Patch by Zach Byrne.

Steve Dower's avatar
Steve Dower committed
3350 3351 3352
- Issue #22733: Fix ffi_prep_args not zero-extending argument values correctly
  on 64-bit Windows.

3353 3354 3355 3356
- Issue #23302: Default to TCP_NODELAY=1 upon establishing an HTTPConnection.
  Removed use of hard-coded MSS as it's an optimization that's no longer needed
  with Nagle disabled.

3357 3358 3359
IDLE
----

Terry Jan Reedy's avatar
Terry Jan Reedy committed
3360 3361 3362 3363
- Issue #20577: Configuration of the max line length for the FormatParagraph
  extension has been moved from the General tab of the Idle preferences dialog
  to the FormatParagraph tab of the Config Extensions dialog.
  Patch by Tal Einat.
3364

Terry Jan Reedy's avatar
Terry Jan Reedy committed
3365 3366 3367
- Issue #16893: Update Idle doc chapter to match current Idle and add new
  information.

Terry Jan Reedy's avatar
Terry Jan Reedy committed
3368 3369 3370 3371
- Issue #3068: Add Idle extension configuration dialog to Options menu.
  Changes are written to HOME/.idlerc/config-extensions.cfg.
  Original patch by Tal Einat.

3372
- Issue #16233: A module browser (File : Class Browser, Alt+C) requires an
Terry Jan Reedy's avatar
Terry Jan Reedy committed
3373 3374
  editor window with a filename.  When Class Browser is requested otherwise,
  from a shell, output window, or 'Untitled' editor, Idle no longer displays
3375
  an error box.  It now pops up an Open Module box (Alt+M). If a valid name
Terry Jan Reedy's avatar
Terry Jan Reedy committed
3376 3377 3378 3379 3380 3381 3382 3383 3384
  is entered and a module is opened, a corresponding browser is also opened.

- Issue #4832: Save As to type Python files automatically adds .py to the
  name you enter (even if your system does not display it).  Some systems
  automatically add .txt when type is Text files.

- Issue #21986: Code objects are not normally pickled by the pickle module.
  To match this, they are no longer pickled when running under Idle.

Terry Jan Reedy's avatar
Terry Jan Reedy committed
3385 3386 3387 3388 3389 3390 3391
- Issue #17390: Adjust Editor window title; remove 'Python',
  move version to end.

- Issue #14105: Idle debugger breakpoints no longer disappear
  when inseting or deleting lines.

- Issue #17172: Turtledemo can now be run from Idle.
Terry Jan Reedy's avatar
Terry Jan Reedy committed
3392 3393 3394
  Currently, the entry is on the Help menu, but it may move to Run.
  Patch by Ramchandra Apt and Lita Cho.

3395 3396
- Issue #21765: Add support for non-ascii identifiers to HyperParser.

Terry Jan Reedy's avatar
Terry Jan Reedy committed
3397 3398 3399 3400 3401 3402 3403
- Issue #21940: Add unittest for WidgetRedirector. Initial patch by Saimadhav
  Heblikar.

- Issue #18592: Add unittest for SearchDialogBase. Patch by Phil Webster.

- Issue #21694: Add unittest for ParenMatch. Patch by Saimadhav Heblikar.

Terry Jan Reedy's avatar
Terry Jan Reedy committed
3404 3405 3406 3407 3408 3409 3410 3411 3412
- Issue #21686: add unittest for HyperParser. Original patch by Saimadhav
  Heblikar.

- Issue #12387: Add missing upper(lower)case versions of default Windows key
  bindings for Idle so Caps Lock does not disable them. Patch by Roger Serwy.

- Issue #21695: Closing a Find-in-files output window while the search is
  still in progress no longer closes Idle.

Terry Jan Reedy's avatar
Terry Jan Reedy committed
3413 3414
- Issue #18910: Add unittest for textView. Patch by Phil Webster.

Terry Jan Reedy's avatar
Terry Jan Reedy committed
3415 3416
- Issue #18292: Add unittest for AutoExpand. Patch by Saihadhav Heblikar.

Terry Jan Reedy's avatar
Terry Jan Reedy committed
3417 3418 3419 3420 3421
- Issue #18409: Add unittest for AutoComplete. Patch by Phil Webster.

- Issue #21477: htest.py - Improve framework, complete set of tests.
  Patches by Saimadhav Heblikar

3422 3423 3424 3425
- Issue #18104: Add idlelib/idle_test/htest.py with a few sample tests to begin
  consolidating and improving human-validated tests of Idle. Change other files
  as needed to work with htest.  Running the module as __main__ runs all tests.

3426 3427 3428
- Issue #21139: Change default paragraph width to 72, the PEP 8 recommendation.

- Issue #21284: Paragraph reformat test passes after user changes reformat width.
3429

3430 3431 3432
- Issue #17654: Ensure IDLE menus are customized properly on OS X for
  non-framework builds and for all variants of Tk.

Ned Deily's avatar
Ned Deily committed
3433 3434 3435
- Issue #23180: Rename IDLE "Windows" menu item to "Window".
  Patch by Al Sweigart.

3436 3437 3438
Build
-----

Benjamin Peterson's avatar
Benjamin Peterson committed
3439 3440 3441
- Issue #15506: Use standard PKG_PROG_PKG_CONFIG autoconf macro in the configure
  script.

Benjamin Peterson's avatar
Benjamin Peterson committed
3442 3443 3444
- Issue #22935: Allow the ssl module to be compiled if openssl doesn't support
  SSL 3.

3445 3446 3447 3448 3449 3450
- Issue #22592: Drop support of the Borland C compiler to build Python. The
  distutils module still supports it to build extensions.

- Issue #22591: Drop support of MS-DOS, especially of the DJGPP compiler
  (MS-DOS port of GCC).

3451 3452
- Issue #16537: Check whether self.extensions is empty in setup.py. Patch by
  Jonathan Hosmer.
Martin v. Löwis's avatar
Martin v. Löwis committed
3453

3454 3455 3456
- Issue #22359: Remove incorrect uses of recursive make.  Patch by Jonas
  Wagner.

Zachary Ware's avatar
Zachary Ware committed
3457 3458 3459
- Issue #21958: Define HAVE_ROUND when building with Visual Studio 2013 and
  above.  Patch by Zachary Turner.

3460 3461 3462 3463
- Issue #18093: the programs that embed the CPython runtime are now in a
  separate "Programs" directory, rather than being kept in the Modules
  directory.

3464 3465 3466
- Issue #15759: "make suspicious", "make linkcheck" and "make doctest" in Doc/
  now display special message when and only when there are failures.

3467 3468 3469 3470 3471 3472 3473
- Issue #21141: The Windows build process no longer attempts to find Perl,
  instead relying on OpenSSL source being configured and ready to build.  The
  ``PCbuild\build_ssl.py`` script has been re-written and re-named to
  ``PCbuild\prepare_ssl.py``, and takes care of configuring OpenSSL source
  for both 32 and 64 bit platforms.  OpenSSL sources obtained from
  svn.python.org will always be pre-configured and ready to build.

3474 3475
- Issue #21037: Add a build option to enable AddressSanitizer support.

3476 3477 3478 3479
- Issue #19962: The Windows build process now creates "python.bat" in the
  root of the source tree, which passes all arguments through to the most
  recently built interpreter.

3480 3481 3482
- Issue #21285: Refactor and fix curses configure check to always search
  in a ncursesw directory.

3483 3484 3485
- Issue #15234: For BerkelyDB and Sqlite, only add the found library and
  include directories if they aren't already being searched. This avoids
  an explicit runtime library dependency.
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3486 3487 3488

- Issue #17861: Tools/scripts/generate_opcode_h.py automatically regenerates
  Include/opcode.h from Lib/opcode.py if the later gets any change.
3489

3490 3491 3492
- Issue #20644: OS X installer build support for documentation build changes
  in 3.4.1: assume externally supplied sphinx-build is available in /usr/bin.

3493 3494 3495 3496 3497
- Issue #20022: Eliminate use of deprecated bundlebuilder in OS X builds.

- Issue #15968: Incorporated Tcl, Tk, and Tix builds into the Windows build
  solution.

3498 3499
- Issue #17095: Fix Modules/Setup *shared* support.

3500 3501
- Issue #21811: Anticipated fixes to support OS X versions > 10.9.

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3502 3503 3504
- Issue #21166: Prevent possible segfaults and other random failures of
  python --generate-posix-vars in pybuilddir.txt build target.

3505 3506
- Issue #18096: Fix library order returned by python-config.

3507 3508
- Issue #17219: Add library build dir for Python extension cross-builds.

3509 3510 3511 3512 3513
- Issue #22919: Windows build updated to support VC 14.0 (Visual Studio 2015),
  which will be used for the official release.

- Issue #21236: Build _msi.pyd with cabinet.lib instead of fci.lib

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3514
- Issue #17128: Use private version of OpenSSL for OS X 10.5+ installer.
3515

3516 3517
C API
-----
3518

3519 3520 3521
- Issue #14203: Remove obsolete support for view==NULL in PyBuffer_FillInfo(),
  bytearray_getbuffer(), bytesiobuf_getbuffer() and array_buffer_getbuf().
  All functions now raise BufferError in that case.
3522

3523 3524 3525 3526
- Issue #22445: PyBuffer_IsContiguous() now implements precise contiguity
  tests, compatible with NumPy's NPY_RELAXED_STRIDES_CHECKING compilation
  flag.  Previously the function reported false negatives for corner cases.

3527 3528 3529
- Issue #22079: PyType_Ready() now checks that statically allocated type has
  no dynamically allocated bases.

3530 3531
- Issue #22453: Removed non-documented macro PyObject_REPR().

3532 3533 3534 3535 3536 3537 3538 3539 3540
- Issue #18395: Rename ``_Py_char2wchar()`` to :c:func:`Py_DecodeLocale`,
  rename ``_Py_wchar2char()`` to :c:func:`Py_EncodeLocale`, and document
  these functions.

- Issue #21233: Add new C functions: PyMem_RawCalloc(), PyMem_Calloc(),
  PyObject_Calloc(), _PyObject_GC_Calloc(). bytes(int) is now using
  ``calloc()`` instead of ``malloc()`` for large objects which is faster and
  use less memory.

3541 3542 3543 3544
- Issue #20942: PyImport_ImportFrozenModuleObject() no longer sets __file__ to
  match what importlib does; this affects _frozen_importlib as well as any
  module loaded using imp.init_frozen().

3545 3546 3547
Documentation
-------------

3548 3549 3550 3551
- Issue #19548: Update the codecs module documentation to better cover the
  distinction between text encodings and other codecs, together with other
  clarifications. Patch by Martin Panter.

3552 3553 3554 3555
- Issue #22394: Doc/Makefile now supports ``make venv PYTHON=../python`` to
  create a venv for generating the documentation, e.g.,
  ``make html PYTHON=venv/bin/python3``.

3556 3557 3558
- Issue #21514: The documentation of the json module now refers to new JSON RFC
  7159 instead of obsoleted RFC 4627.

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3559 3560 3561 3562
- Issue #21777: The binary sequence methods on bytes and bytearray are now
  documented explicitly, rather than assuming users will be able to derive
  the expected behaviour from the behaviour of the corresponding str methods.

3563 3564
- Issue #6916: undocument deprecated asynchat.fifo class.

3565 3566 3567
- Issue #17386: Expanded functionality of the ``Doc/make.bat`` script to make
  it much more comparable to ``Doc/Makefile``.

3568 3569 3570
- Issue #21312: Update the thread_foobar.h template file to include newer
  threading APIs.  Patch by Jack McCracken.

3571 3572 3573
- Issue #21043: Remove the recommendation for specific CA organizations and to
  mention the ability to load the OS certificates.

3574 3575 3576 3577 3578 3579 3580 3581 3582
- Issue #20765: Add missing documentation for PurePath.with_name() and
  PurePath.with_suffix().

- Issue #19407: New package installation and distribution guides based on
  the Python Packaging Authority tools. Existing guides have been retained
  as legacy links from the distutils docs, as they still contain some
  required reference material for tool developers that isn't recorded
  anywhere else.

3583 3584
- Issue #19697: Document cases where __main__.__spec__ is None.

3585 3586 3587
Tests
-----

3588 3589
- Issue #18982: Add tests for CLI of the calendar module.

3590 3591 3592 3593
- Issue #19548: Added some additional checks to test_codecs to ensure that
  statements in the updated documentation remain accurate. Patch by Martin
  Panter.

3594 3595
- Issue #22838: All test_re tests now work with unittest test discovery.

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3596 3597
- Issue #22173: Update lib2to3 tests to use unittest test discovery.

3598 3599 3600 3601 3602
- Issue #16000: Convert test_curses to use unittest.

- Issue #21456: Skip two tests in test_urllib2net.py if _ssl module not
  present. Patch by Remi Pointel.

3603 3604
- Issue #20746: Fix test_pdb to run in refleak mode (-R).  Patch by Xavier
  de Gaye.
3605

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3606 3607 3608
- Issue #22060: test_ctypes has been somewhat cleaned up and simplified; it
  now uses unittest test discovery to find its tests.

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3609 3610 3611
- Issue #22104: regrtest.py no longer holds a reference to the suite of tests
  loaded from test modules that don't define test_main().

3612 3613
- Issue #22111: Assorted cleanups in test_imaplib.  Patch by Milan Oberkirch.

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3614 3615 3616 3617
- Issue #22002: Added ``load_package_tests`` function to test.support and used
  it to implement/augment test discovery in test_asyncio, test_email,
  test_importlib, test_json, and test_tools.

3618 3619 3620
- Issue #21976: Fix test_ssl to accept LibreSSL version strings.  Thanks
  to William Orr.

3621 3622 3623
- Issue #21918: Converted test_tools from a module to a package containing
  separate test files for each tested script.

3624 3625 3626
- Issue #9554: Use modern unittest features in test_argparse. Initial patch by
  Denver Coneybeare and Radu Voicilas.

3627 3628 3629 3630
- Issue #20155: Changed HTTP method names in failing tests in test_httpservers
  so that packet filtering software (specifically Windows Base Filtering Engine)
  does not interfere with the transaction semantics expected by the tests.

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3631 3632 3633
- Issue #19493: Refactored the ctypes test package to skip tests explicitly
  rather than silently.

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3634 3635 3636
- Issue #18492: All resources are now allowed when tests are not run by
  regrtest.py.

3637 3638 3639 3640
- Issue #21634: Fix pystone micro-benchmark: use floor division instead of true
  division to benchmark integers instead of floating point numbers. Set pystone
  version to 1.2. Patch written by Lennart Regebro.

3641 3642
- Issue #21605: Added tests for Tkinter images.

3643 3644 3645 3646 3647
- Issue #21493: Added test for ntpath.expanduser().  Original patch by
  Claudiu Popa.

- Issue #19925: Added tests for the spwd module. Original patch by Vajrasky Kok.

3648 3649 3650
- Issue #21522: Added Tkinter tests for Listbox.itemconfigure(),
  PanedWindow.paneconfigure(), and Menu.entryconfigure().

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3651 3652
- Issue #17756: Fix test_code test when run from the installed location.

3653 3654
- Issue #17752: Fix distutils tests when run from the installed location.

3655 3656 3657 3658
- Issue #18604: Consolidated checks for GUI availability.  All platforms now
  at least check whether Tk can be instantiated when the GUI resource is
  requested.

3659 3660
- Issue #21275: Fix a socket test on KFreeBSD.

3661 3662 3663
- Issue #21223: Pass test_site/test_startup_imports when some of the extensions
  are built as builtins.

3664 3665
- Issue #20635: Added tests for Tk geometry managers.

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3666 3667
- Add test case for freeze.

3668 3669
- Issue #20743: Fix a reference leak in test_tcl.

3670 3671
- Issue #21097: Move test_namespace_pkgs into test_importlib.

3672 3673
- Issue #21503: Use test_both() consistently in test_importlib.

3674 3675 3676 3677
- Issue #20939: Avoid various network test failures due to new
  redirect of http://www.python.org/ to https://www.python.org:
  use http://www.example.com instead.

3678 3679 3680
- Issue #20668: asyncio tests no longer rely on tests.txt file.
  (Patch by Vajrasky Kok)

3681 3682 3683
- Issue #21093: Prevent failures of ctypes test_macholib on OS X if a
  copy of libz exists in $HOME/lib or /usr/local/lib.

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3684 3685
- Issue #22770: Prevent some Tk segfaults on OS X when running gui tests.

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3686 3687
- Issue #23211: Workaround test_logging failure on some OS X 10.6 systems.

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3688 3689 3690
- Issue #23345: Prevent test_ssl failures with large OpenSSL patch level
  values (like 0.9.8zc).

3691 3692 3693
Tools/Demos
-----------

3694 3695
- Issue #22314: pydoc now works when the LINES environment variable is set.

3696 3697 3698 3699
- Issue #22615: Argument Clinic now supports the "type" argument for the
  int converter.  This permits using the int converter with enums and
  typedefs.

3700 3701
- Issue #20076: The makelocalealias.py script no longer ignores UTF-8 mapping.

3702 3703 3704
- Issue #20079: The makelocalealias.py script now can parse the SUPPORTED file
  from glibc sources and supports command line options for source paths.

3705 3706 3707
- Issue #22201: Command-line interface of the zipfile module now correctly
  extracts ZIP files with directory entries.  Patch by Ryan Wilson.

3708 3709 3710 3711
- Issue #22120: For functions using an unsigned integer return converter,
  Argument Clinic now generates a cast to that type for the comparison
  to -1 in the generated code.  (This supresses a compilation warning.)

3712 3713
- Issue #18974: Tools/scripts/diff.py now uses argparse instead of optparse.

3714 3715 3716
- Issue #21906: Make Tools/scripts/md5sum.py work in Python 3.
  Patch by Zachary Ware.

3717 3718
- Issue #21629: Fix Argument Clinic's "--converters" feature.

3719 3720
- Add support for ``yield from`` to 2to3.

3721 3722
- Add support for the PEP 465 matrix multiplication operator to 2to3.

3723 3724 3725
- Issue #16047: Fix module exception list and __file__ handling in freeze.
  Patch by Meador Inge.

3726 3727
- Issue #11824: Consider ABI tags in freeze. Patch by Meador Inge.

3728 3729 3730
- Issue #20535: PYTHONWARNING no longer affects the run_tests.py script.
  Patch by Arfrever Frehtes Taifersar Arahesis.

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3731 3732 3733
Windows
-------

3734 3735
- Issue #23260: Update Windows installer

3736 3737 3738 3739 3740
- The bundled version of Tcl/Tk has been updated to 8.6.3.  The most visible
  result of this change is the addition of new native file dialogs when
  running on Windows Vista or newer.  See Tcl/Tk's TIP 432 for more
  information.  Also, this version of Tcl/Tk includes support for Windows 10.

3741 3742 3743
- Issue #17896: The Windows build scripts now expect external library sources
  to be in ``PCbuild\..\externals`` rather than ``PCbuild\..\..``.

3744 3745 3746
- Issue #17717: The Windows build scripts now use a copy of NASM pulled from
  svn.python.org to build OpenSSL.

3747 3748
- Issue #21907: Improved the batch scripts provided for building Python.

3749
- Issue #22644: The bundled version of OpenSSL has been updated to 1.0.1j.
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3750

3751 3752
- Issue #10747: Use versioned labels in the Windows start menu.
  Patch by Olive Kilburn.
3753

3754 3755 3756
- Issue #22980: .pyd files with a version and platform tag (for example,
  ".cp35-win32.pyd") will now be loaded in preference to those without tags.

3757

3758 3759 3760 3761 3762 3763 3764 3765
What's New in Python 3.4.0?
===========================

Release date: 2014-03-16

Library
-------

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3766 3767 3768
- Issue #20939: Fix test_geturl failure in test_urllibnet due to
  new redirect of http://www.python.org/ to https://www.python.org.

3769 3770 3771 3772 3773
Documentation
-------------

- Merge in all documentation changes since branching 3.4.0rc1.

3774

3775 3776
What's New in Python 3.4.0 release candidate 3?
===============================================
3777

3778 3779
Release date: 2014-03-09

3780 3781 3782 3783 3784 3785
Core and Builtins
-----------------

- Issue #20786: Fix signatures for dict.__delitem__ and
  property.__delete__ builtins.

3786 3787 3788 3789 3790 3791 3792
Library
-------

- Issue #20839: Don't trigger a DeprecationWarning in the still supported
  pkgutil.get_loader() API when __loader__ isn't set on a module (nor
  when pkgutil.find_loader() is called directly).

3793 3794 3795
Build
-----

3796 3797
- Issue #14512: Launch pydoc -b instead of pydocgui.pyw on Windows.

3798 3799 3800
- Issue #20748: Uninstalling pip does not leave behind the pyc of
  the uninstaller anymore.

3801 3802 3803
- Issue #20568: The Windows installer now installs the unversioned ``pip``
  command in addition to the versioned ``pip3`` and ``pip3.4`` commands.

3804 3805 3806 3807
- Issue #20757: The ensurepip helper for the Windows uninstaller now skips
  uninstalling pip (rather than failing) if the user has updated pip to a
  different version from the one bundled with ensurepip.

3808
- Issue #20465: Update OS X and Windows installer builds to use
3809
  SQLite 3.8.3.1.
3810 3811


3812 3813 3814 3815 3816 3817 3818 3819
What's New in Python 3.4.0 release candidate 2?
===============================================

Release date: 2014-02-23

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

3820 3821 3822
- Issue #20625: Parameter names in __annotations__ were not mangled properly.
  Discovered by Jonas Wielicki, patch by Yury Selivanov.

3823 3824 3825
- Issue #20261: In pickle, lookup __getnewargs__ and __getnewargs_ex__ on the
  type of the object.

3826 3827 3828
- Issue #20619: Give the AST nodes of keyword-only arguments a column and line
  number.

3829 3830 3831 3832
- Issue #20526: Revert changes of issue #19466 which introduces a regression:
  don't clear anymore the state of Python threads early during the Python
  shutdown.

3833 3834 3835
Library
-------

3836 3837 3838
- Issue #20710: The pydoc summary line no longer displays the "self" parameter
  for bound methods.

3839 3840 3841 3842 3843 3844 3845 3846 3847 3848 3849 3850 3851 3852 3853 3854 3855 3856 3857
- Issue #20566: Change asyncio.as_completed() to use a Queue, to
  avoid O(N**2) behavior.

- Issue #20704: Implement new debug API in asyncio. Add new methods
  BaseEventLoop.set_debug() and BaseEventLoop.get_debug().
  Add support for setting 'asyncio.tasks._DEBUG' variable with
  'PYTHONASYNCIODEBUG' environment variable.

- asyncio: Refactoring and fixes: BaseEventLoop.sock_connect() raises an
  error if the address is not resolved; use __slots__ in Handle and
  TimerHandle; as_completed() and wait() raise TypeError if the passed
  list of Futures is a single Future; call_soon() and other 'call_*()'
  functions raise TypeError if the passed callback is a coroutine
  function; _ProactorBasePipeTransport uses _FlowControlMixin;
  WriteTransport.set_write_buffer_size() calls _maybe_pause_protocol()
  to consider pausing receiving if the watermark limits have changed;
  fix _check_resolved_address() for IPv6 address; and other minor
  improvements, along with multiple documentation updates.

3858 3859 3860 3861
- Issue #20684: Fix inspect.getfullargspec() to not to follow __wrapped__
  chains. Make its behaviour consistent with bound methods first argument.
  Patch by Nick Coghlan and Yury Selivanov.

3862 3863 3864 3865
- Issue #20681: Add new error handling API in asyncio. New APIs:
  loop.set_exception_handler(), loop.default_exception_handler(), and
  loop.call_exception_handler().

3866 3867 3868 3869
- Issue #20673: Implement support for UNIX Domain Sockets in asyncio.
  New APIs: loop.create_unix_connection(), loop.create_unix_server(),
  streams.open_unix_connection(), and streams.start_unix_server().

3870 3871
- Issue #20616: Add a format() method to tracemalloc.Traceback.

3872 3873 3874 3875
- Issue #19744: the ensurepip installation step now just prints a warning to
  stderr rather than failing outright if SSL/TLS is unavailable. This allows
  local installation of POSIX builds without SSL/TLS support.

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3876 3877
- Issue #20594: Avoid name clash with the libc function posix_close.

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Build
-----

3881 3882 3883
- Issue #20641: Run MSI custom actions (pip installation, pyc compilation)
  with the NoImpersonate flag, to support elevated execution (UAC).

3884 3885 3886
- Issue #20221: Removed conflicting (or circular) hypot definition when
  compiled with VS 2010 or above.  Initial patch by Tabrez Mohammed.

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- Issue #20609: Restored the ability to build 64-bit Windows binaries on
  32-bit Windows, which was broken by the change in issue #19788.

3890

3891 3892 3893
What's New in Python 3.4.0 release candidate 1?
===============================================

3894
Release date: 2014-02-10
3895 3896 3897 3898

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

3899 3900 3901
- Issue #19255: The builtins module is restored to initial value before
  cleaning other modules.  The sys and builtins modules are cleaned last.

3902 3903
- Issue #20588: Make Python-ast.c C89 compliant.

3904
- Issue #20437: Fixed 22 potential bugs when deleting objects references.
3905

3906 3907 3908 3909
- Issue #20500: Displaying an exception at interpreter shutdown no longer
  risks triggering an assertion failure in PyObject_Str.

- Issue #20538: UTF-7 incremental decoder produced inconsistent string when
3910 3911
  input was truncated in BASE64 section.

3912 3913 3914 3915 3916 3917
- Issue #20404: io.TextIOWrapper (and hence the open() builtin) now uses the
  internal codec marking system added for issue #19619 to throw LookupError
  for known non-text encodings at stream construction time. The existing
  output type checks remain in place to deal with unmarked third party
  codecs.

3918 3919
- Issue #17162: Add PyType_GetSlot.

3920 3921 3922
- Issue #20162: Fix an alignment issue in the siphash24() hash function which
  caused a crash on PowerPC 64-bit (ppc64).

3923 3924 3925
Library
-------

3926 3927 3928
- Issue #20530: The signatures for slot builtins have been updated
  to reflect the fact that they only accept positional-only arguments.

3929 3930 3931
- Issue #20517: Functions in the os module that accept two filenames
  now register both filenames in the exception on failure.

3932 3933
- Issue #20563: The ipaddress module API is now considered stable.

3934 3935 3936 3937
- Issue #14983: email.generator now always adds a line end after each MIME
  boundary marker, instead of doing so only when there is an epilogue.  This
  fixes an RFC compliance bug and solves an issue with signed MIME parts.

3938 3939 3940 3941 3942
- Issue #20540: Fix a performance regression (vs. Python 3.2) when layering
  a multiprocessing Connection over a TCP socket.  For small payloads, Nagle's
  algorithm would introduce idle delays before the entire transmission of a
  message.

3943 3944 3945
- Issue #16983: the new email header parsing code will now decode encoded words
  that are (incorrectly) surrounded by quotes, and register a defect.

3946 3947 3948
- Issue #19772: email.generator no longer mutates the message object when
  doing a down-transform from 8bit to 7bit CTEs.

3949 3950 3951
- Issue #20536: the statistics module now correctly handle Decimal instances
  with positive exponents

3952
- Issue #18805: the netmask/hostmask parsing in ipaddress now more reliably
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  filters out illegal values and correctly allows any valid prefix length.
3954

3955 3956 3957 3958 3959 3960
- Issue #20481: For at least Python 3.4, the statistics module will require
  that all inputs for a single operation be of a single consistent type, or
  else a mixed of ints and a single other consistent type. This avoids
  some interoperability issues that arose with the previous approach of
  coercing to a suitable common type.

3961 3962 3963
- Issue #20478: the statistics module now treats collections.Counter inputs
  like any other iterable.

3964 3965 3966 3967
- Issue #17369: get_filename was raising an exception if the filename
  parameter's RFC2231 encoding was broken in certain ways.  This was
  a regression relative to python2.

3968 3969 3970 3971
- Issue #20013: Some imap servers disconnect if the current mailbox is
  deleted, and imaplib did not handle that case gracefully.  Now it
  handles the 'bye' correctly.

3972 3973 3974 3975
- Issue #20531: Revert 3.4 version of fix for #19063, and apply the 3.3
  version.  That is, do *not* raise an error if unicode is passed to
  email.message.Message.set_payload.

3976 3977 3978 3979
- Issue #20476: If a non-compat32 policy is used with any of the email parsers,
  EmailMessage is now used as the factory class.  The factory class should
  really come from the policy; that will get fixed in 3.5.

3980 3981 3982
- Issue #19920: TarFile.list() no longer fails when outputs a listing
  containing non-encodable characters.  Based on patch by Vajrasky Kok.

3983 3984
- Issue #20515: Fix NULL pointer dereference introduced by issue #20368.

3985 3986
- Issue #19186: Restore namespacing of expat symbols inside the pyexpat module.

3987 3988 3989
- Issue #20053: ensurepip (and hence venv) are no longer affected by the
  settings in the default pip configuration file.

3990 3991 3992
- Issue #20426: When passing the re.DEBUG flag, re.compile() displays the
  debug output every time it is called, regardless of the compilation cache.

3993 3994
- Issue #20368: The null character now correctly passed from Tcl to Python.
  Improved error handling in variables-related commands.
3995

3996 3997
- Issue #20435: Fix _pyio.StringIO.getvalue() to take into account newline
  translation settings.
3998

3999 4000
- tracemalloc: Fix slicing traces and fix slicing a traceback.

4001 4002 4003
- Issue #20354: Fix an alignment issue in the tracemalloc module on 64-bit
  platforms. Bug seen on 64-bit Linux when using "make profile-opt".

4004 4005 4006
- Issue #17159: inspect.signature now accepts duck types of functions,
  which adds support for Cython functions. Initial patch by Stefan Behnel.

4007 4008 4009
- Issue #18801: Fix inspect.classify_class_attrs to correctly classify
  object.__new__ and object.__init__.

4010 4011
- Fixed cmath.isinf's name in its argument parsing code.

4012 4013 4014 4015 4016
- Issue #20311, #20452: poll and epoll now round the timeout away from zero,
  instead of rounding towards zero, in select and selectors modules:
  select.epoll.poll(), selectors.PollSelector.poll() and
  selectors.EpollSelector.poll(). For example, a timeout of one microsecond
  (1e-6) is now rounded to one millisecondi (1e-3), instead of being rounded to
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  zero.  However, the granularity property and asyncio's resolution feature
  were removed again.
4019

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4020 4021 4022 4023
- asyncio: Some refactoring; various fixes; add write flow control to
  unix pipes; Future.set_exception() instantiates the exception
  argument if it is a class; improved proactor pipe transport; support
  wait_for(f, None); don't log broken/disconnected pipes; use
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  ValueError instead of assert for forbidden subprocess_{shell,exec}
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  arguments; added a convenience API for subprocess management; added
  StreamReader.at_eof(); properly handle duplicate coroutines/futures
  in gather(), wait(), as_completed(); use a bytearray for buffering
  in StreamReader; and more.
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4030 4031
- Issue #20288: fix handling of invalid numeric charrefs in HTMLParser.

4032 4033
- Issue #20424: Python implementation of io.StringIO now supports lone surrogates.

4034 4035 4036
- Issue #20308: inspect.signature now works on classes without user-defined
  __init__ or __new__ methods.

4037 4038 4039 4040 4041 4042 4043 4044 4045 4046
- Issue #20372: inspect.getfile (and a bunch of other inspect functions that
  use it) doesn't crash with unexpected AttributeError on classes defined in C
  without __module__.

- Issue #20356: inspect.signature formatting uses '/' to separate
  positional-only parameters from others.

- Issue #20223: inspect.signature now supports methods defined with
  functools.partialmethods.

4047 4048 4049 4050 4051 4052 4053 4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065
- Issue #19456: ntpath.join() now joins relative paths correctly when a drive
  is present.

- Issue #19077: tempfile.TemporaryDirectory cleanup no longer fails when
  called during shutdown.  Emitting resource warning in __del__ no longer fails.
  Original patch by Antoine Pitrou.

- Issue #20394: Silence Coverity warning in audioop module.

- Issue #20367: Fix behavior of concurrent.futures.as_completed() for
  duplicate arguments.  Patch by Glenn Langford.

- Issue #8260: The read(), readline() and readlines() methods of
  codecs.StreamReader returned incomplete data when were called after
  readline() or read(size).  Based on patch by Amaury Forgeot d'Arc.

- Issue #20105: the codec exception chaining now correctly sets the
  traceback of the original exception as its __traceback__ attribute.

4066 4067
- Issue #17481: inspect.getfullargspec() now uses inspect.signature() API.

4068 4069 4070
- Issue #15304: concurrent.futures.wait() can block forever even if
  Futures have completed. Patch by Glenn Langford.

4071
- Issue #14455: plistlib: fix serializing integers in the range
4072 4073 4074
  of an unsigned long long but outside of the range of signed long long for
  binary plist files.

4075 4076 4077
IDLE
----

4078 4079 4080
- Issue #20406: Use Python application icons for Idle window title bars.
  Patch mostly by Serhiy Storchaka.

4081
- Update the python.gif icon for the Idle classbrowser and pathbowser
4082
  from the old green snake to the new blue and yellow snakes.
4083

4084 4085 4086 4087 4088 4089
- Issue #17721: Remove non-functional configuration dialog help button until we
  make it actually gives some help when clicked. Patch by Guilherme Simões.

Tests
-----

4090 4091
- Issue #20532: Tests which use _testcapi now are marked as CPython only.

4092 4093
- Issue #19920: Added tests for TarFile.list().  Based on patch by Vajrasky Kok.

4094 4095 4096
- Issue #19990: Added tests for the imghdr module.  Based on patch by
  Claudiu Popa.

4097 4098
- Issue #20474: Fix test_socket "unexpected success" failures on OS X 10.7+.

4099 4100 4101
Tools/Demos
-----------

4102 4103 4104 4105 4106 4107 4108
- Issue #20530: Argument Clinic's signature format has been revised again.
  The new syntax is highly human readable while still preventing false
  positives.  The syntax also extends Python syntax to denote "self" and
  positional-only parameters, allowing inspect.Signature objects to be
  totally accurate for all supported builtins in Python 3.4.

- Issue #20456: Argument Clinic now observes the C preprocessor conditional
4109 4110 4111 4112
  compilation statements of the C files it parses.  When a Clinic block is
  inside a conditional code, it adjusts its output to match, including
  automatically generating an empty methoddef macro.

4113
- Issue #20456: Cloned functions in Argument Clinic now use the correct
4114 4115 4116
  name, not the name of the function they were cloned from, for text
  strings inside generated code.

4117
- Issue #20456: Fixed Argument Clinic's test suite and "--converters" feature.
4118

4119
- Issue #20456: Argument Clinic now allows specifying different names
4120 4121
  for a parameter in Python and C, using "as" on the parameter line.

4122 4123 4124 4125 4126 4127 4128 4129 4130
- Issue #20326: Argument Clinic now uses a simple, unique signature to
  annotate text signatures in docstrings, resulting in fewer false
  positives.  "self" parameters are also explicitly marked, allowing
  inspect.Signature() to authoritatively detect (and skip) said parameters.

- Issue #20326: Argument Clinic now generates separate checksums for the
  input and output sections of the block, allowing external tools to verify
  that the input has not changed (and thus the output is not out-of-date).

4131 4132 4133 4134 4135
Build
-----

- Issue #20465: Update SQLite shipped with OS X installer to 3.8.3.

4136 4137 4138 4139
C-API
-----

- Issue #20517: Added new functions allowing OSError exceptions to reference
4140 4141
  two filenames instead of one: PyErr_SetFromErrnoWithFilenameObjects() and
  PyErr_SetExcFromWindowsErrWithFilenameObjects().
4142

4143 4144 4145
Documentation
-------------

Brett Cannon's avatar
Brett Cannon committed
4146 4147 4148
- Issue #20488: Change wording to say importlib is *the* implementation of
  import instead of just *an* implementation.

4149 4150 4151 4152
- Issue #6386: Clarify in the tutorial that specifying a symlink to execute
  means the directory containing the executed script and not the symlink is
  added to sys.path.

4153

4154 4155
What's New in Python 3.4.0 Beta 3?
==================================
4156

Larry Hastings's avatar
Larry Hastings committed
4157
Release date: 2014-01-26
4158 4159 4160 4161

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

4162 4163 4164 4165
- Issue #20189: Four additional builtin types (PyTypeObject,
  PyMethodDescr_Type, _PyMethodWrapper_Type, and PyWrapperDescr_Type)
  have been modified to provide introspection information for builtins.

4166 4167 4168
- Issue #17825: Cursor "^" is correctly positioned for SyntaxError and
  IndentationError.

4169 4170 4171 4172
- Issue #2382: SyntaxError cursor "^" is now written at correct position in most
  cases when multibyte characters are in line (before "^").  This still not
  works correctly with wide East Asian characters.

4173 4174 4175 4176 4177 4178 4179
- Issue #18960: The first line of Python script could be executed twice when
  the source encoding was specified on the second line.  Now the source encoding
  declaration on the second line isn't effective if the first line contains
  anything except a comment.  'python -x' works now again with files with the
  source encoding declarations, and can be used to make Python batch files
  on Windows.

4180 4181 4182
Library
-------

Guido van Rossum's avatar
Guido van Rossum committed
4183 4184 4185 4186 4187 4188 4189
- asyncio: Various improvements and small changes not all covered by
  issues listed below.  E.g. wait_for() now cancels the inner task if
  the timeout occcurs; tweaked the set of exported symbols; renamed
  Empty/Full to QueueEmpty/QueueFull; "with (yield from lock)" now
  uses a separate context manager; readexactly() raises if not enough
  data was read; PTY support tweaks.

4190 4191 4192 4193 4194
- Issue #20311: asyncio: Add a granularity attribute to BaseEventLoop: maximum
  between the resolution of the BaseEventLoop.time() method and the resolution
  of the selector. The granuarility is used in the scheduler to round time and
  deadline.

4195 4196
- Issue #20311: selectors: Add a resolution attribute to BaseSelector.

4197 4198 4199 4200
- Issue #20189: unittest.mock now no longer assumes that any object for
  which it could get an inspect.Signature is a callable written in Python.
  Fix courtesy of Michael Foord.

4201 4202 4203 4204 4205 4206
- Issue #20317: ExitStack.__exit__ could create a self-referential loop if an
  exception raised by a cleanup operation already had its context set
  correctly (for example, by the @contextmanager decorator). The infinite
  loop this caused is now avoided by checking if the expected context is
  already set before trying to fix it.

4207 4208
- Issue #20374: Fix build with GNU readline >= 6.3.

4209 4210 4211
- Issue #20262: Warnings are raised now when duplicate names are added in the
  ZIP file or too long ZIP file comment is truncated.

4212 4213 4214
- Issue #20165: The unittest module no longer considers tests marked with
  @expectedFailure successful if they pass.

4215 4216
- Issue #18574: Added missing newline in 100-Continue reply from
  http.server.BaseHTTPRequestHandler. Patch by Nikolaus Rath.
4217

4218 4219
- Issue #20270: urllib.urlparse now supports empty ports.

4220 4221
- Issue #20243: TarFile no longer raise ReadError when opened in write mode.

4222 4223 4224
- Issue #20238: TarFile opened with external fileobj and "w:gz" mode didn't
  write complete output on close.

4225 4226 4227
- Issue #20245: The open functions in the tarfile module now correctly handle
  empty mode.

4228 4229 4230
- Issue #20242: Fixed basicConfig() format strings for the alternative
  formatting styles. Thanks to kespindler for the bug report and patch.

Benjamin Peterson's avatar
Benjamin Peterson committed
4231 4232
- Issue #20246: Fix buffer overflow in socket.recvfrom_into.

4233 4234 4235 4236
- Issues #20206 and #5803: Fix edge case in email.quoprimime.encode where it
  truncated lines ending in a character needing encoding but no newline by
  using a more efficient algorithm that doesn't have the bug.

4237 4238 4239
- Issue #19082: Working xmlrpc.server and xmlrpc.client examples. Both in
  modules and in documentation. Initial patch contributed by Vajrasky Kok.

4240 4241 4242
- Issue #20138: The wsgiref.application_uri() and wsgiref.request_uri()
  functions now conform to PEP 3333 when handle non-ASCII URLs.

4243
- Issue #19097: Raise the correct Exception when cgi.FieldStorage is given an
4244
  invalid fileobj.
4245

4246
- Issue #20152: Ported Python/import.c over to Argument Clinic.
4247

4248 4249 4250 4251
- Issue #13107: argparse and optparse no longer raises an exception when output
  a help on environment with too small COLUMNS.  Based on patch by
  Elazar Gershuni.

4252 4253 4254
- Issue #20207: Always disable SSLv2 except when PROTOCOL_SSLv2 is explicitly
  asked for.

4255 4256 4257
- Issue #18960: The tokenize module now ignore the source encoding declaration
  on the second line if the first line contains anything except a comment.

4258 4259 4260
- Issue #20078: Reading malformed zipfiles no longer hangs with 100% CPU
  consumption.

4261 4262 4263
- Issue #20113: os.readv() and os.writev() now raise an OSError exception on
  error instead of returning -1.

4264 4265 4266 4267
- Issue #19719: Make importlib.abc.MetaPathFinder.find_module(),
  PathEntryFinder.find_loader(), and Loader.load_module() use PEP 451 APIs to
  help with backwards-compatibility.

4268 4269 4270
- Issue #20144: inspect.Signature now supports parsing simple symbolic
  constants as parameter default values in __text_signature__.

4271 4272
- Issue #20072: Fixed multiple errors in tkinter with wantobjects is False.

4273 4274
- Issue #20229: Avoid plistlib deprecation warning in platform.mac_ver().

4275 4276
- Issue #14455: Fix some problems with the new binary plist support in plistlib.

4277 4278 4279
IDLE
----

4280
- Issue #17390: Add Python version to Idle editor window title bar.
Terry Jan Reedy's avatar
Terry Jan Reedy committed
4281
  Original patches by Edmond Burnett and Kent Johnson.
4282

4283 4284 4285
- Issue #18960: IDLE now ignores the source encoding declaration on the second
  line if the first line contains anything except a comment.

4286 4287 4288
Tests
-----

4289 4290 4291
- Issue #20358: Tests for curses.window.overlay and curses.window.overwrite
  no longer specify min{row,col} > max{row,col}.

4292 4293 4294
- Issue #19804: The test_find_mac test in test_uuid is now skipped if the
  ifconfig executable is not available.

4295 4296
- Issue #19886: Use better estimated memory requirements for bigmem tests.

4297 4298
Tools/Demos
-----------
4299

4300 4301 4302 4303
- Issue #20390: Argument Clinic's "file" output preset now defaults to
  "{dirname}/clinic/{basename}.h".

- Issue #20390: Argument Clinic's "class" directive syntax has been extended
4304
  with two new required arguments: "typedef" and "type_object".
4305 4306 4307 4308 4309 4310 4311 4312 4313 4314 4315 4316

- Issue #20390: Argument Clinic: If __new__ or __init__ functions didn't use
  kwargs (or args), the PyArg_NoKeywords (or PyArg_NoPositional) calls
  generated are only run when the type object is an exact match.

- Issue #20390: Argument Clinic now fails if you have required parameters after
  optional parameters.

- Issue #20390: Argument Clinic converters now have a new template they can
  inject code into: "modifiers".  Code put there is run in the parsing
  function after argument parsing but before the call to the impl.

4317 4318
- Issue #20376: Argument Clinic now escapes backslashes in docstrings.

4319 4320 4321 4322
- Issue #20381: Argument Clinic now sanity checks the default argument when
  c_default is also specified, providing a nice failure message for
  disallowed values.

4323 4324 4325 4326 4327 4328 4329 4330 4331 4332
- Issue #20189: Argument Clinic now ensures that parser functions for
  __new__ are always of type newfunc, the type of the tp_new slot.
  Similarly, parser functions for __init__ are now always of type initproc,
  the type of tp_init.

- Issue #20189: Argument Clinic now suppresses the docstring for __new__
  and __init__ functions if no docstring is provided in the input.

- Issue #20189: Argument Clinic now suppresses the "self" parameter in the
  impl for @staticmethod functions.
4333

4334 4335 4336
- Issue #20294: Argument Clinic now supports argument parsing for __new__ and
  __init__ functions.

4337 4338 4339
- Issue #20299: Argument Clinic custom converters may now change the default
  value of c_default and py_default with a class member.

4340 4341 4342
- Issue #20287: Argument Clinic's output is now configurable, allowing
  delaying its output or even redirecting it to a separate file.

4343 4344 4345
- Issue #20226: Argument Clinic now permits simple expressions
  (e.g. "sys.maxsize - 1") as default values for parameters.

4346 4347 4348 4349 4350 4351
- Issue #19936: Added executable bits or shebang lines to Python scripts which
  requires them.  Disable executable bits and shebang lines in test and
  benchmark files in order to prevent using a random system python, and in
  source files of modules which don't provide command line interface.  Fixed
  shebang lines in the unittestgui and checkpip scripts.

4352 4353 4354
- Issue #20268: Argument Clinic now supports cloning the parameters and
  return converter of existing functions.

4355 4356 4357
- Issue #20228: Argument Clinic now has special support for class special
  methods.

4358 4359 4360
- Issue #20214: Fixed a number of small issues and documentation errors in
  Argument Clinic (see issue for details).

4361 4362 4363 4364
- Issue #20196: Fixed a bug where Argument Clinic did not generate correct
  parsing code for functions with positional-only parameters where all arguments
  are optional.

4365 4366 4367 4368
- Issue #18960: 2to3 and the findnocoding.py script now ignore the source
  encoding declaration on the second line if the first line contains anything
  except a comment.

4369
- Issue #19723: The marker comments Argument Clinic uses have been changed
4370 4371
  to improve readability.

4372 4373 4374
- Issue #20157: When Argument Clinic renames a parameter because its name
  collides with a C keyword, it no longer exposes that rename to PyArg_Parse.

4375 4376 4377
- Issue #20141: Improved Argument Clinic's support for the PyArg_Parse "O!"
  format unit.

4378 4379 4380
- Issue #20144: Argument Clinic now supports simple symbolic constants
  as parameter default values.

4381 4382 4383
- Issue #20143: The line numbers reported in Argument Clinic errors are
  now more accurate.

4384 4385
- Issue #20142: Py_buffer variables generated by Argument Clinic are now
  initialized with a default value.
4386

4387 4388 4389 4390 4391 4392
Build
-----

- Issue #12837: Silence a tautological comparison warning on OS X under Clang in
  socketmodule.c.

Georg Brandl's avatar
Georg Brandl committed
4393

4394 4395 4396 4397 4398 4399 4400 4401
What's New in Python 3.4.0 Beta 2?
==================================

Release date: 2014-01-05

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

4402 4403
- Issue #17432: Drop UCS2 from names of Unicode functions in python3.def.

4404 4405 4406
- Issue #19526: Exclude all new API from the stable ABI. Exceptions can be
  made if a need is demonstrated.

4407 4408 4409
- Issue #19969: PyBytes_FromFormatV() now raises an OverflowError if "%c"
  argument is not in range [0; 255].

4410 4411
- Issue #19995: %c, %o, %x, and %X now issue a DeprecationWarning on non-integer
  input; reworded docs to clarify that an integer type should define both __int__
4412 4413
  and __index__.

4414 4415 4416 4417
- Issue #19787: PyThread_set_key_value() now always set the value. In Python
  3.3, the function did nothing if the key already exists (if the current value
  is a non-NULL pointer).

4418 4419 4420 4421 4422 4423
- Issue #14432: Remove the thread state field from the frame structure. Fix a
  crash when a generator is created in a C thread that is destroyed while the
  generator is still used. The issue was that a generator contains a frame, and
  the frame kept a reference to the Python state of the destroyed C thread. The
  crash occurs when a trace function is setup.

4424 4425 4426 4427 4428
- Issue #19576: PyGILState_Ensure() now initializes threads. At startup, Python
  has no concrete GIL. If PyGILState_Ensure() is called from a new thread for
  the first time and PyEval_InitThreads() was not called yet, a GIL needs to be
  created.

4429 4430 4431
- Issue #17576: Deprecation warning emitted now when __int__() or __index__()
  return not int instance.

4432 4433
- Issue #19932: Fix typo in import.h, missing whitespaces in function prototypes.

4434 4435 4436
- Issue #19736: Add module-level statvfs constants defined for GNU/glibc
  based systems.

4437 4438
- Issue #20097: Fix bad use of "self" in importlib's WindowsRegistryFinder.

4439 4440
- Issue #19729: In str.format(), fix recursive expansion in format spec.

4441 4442 4443
- Issue #19638: Fix possible crash / undefined behaviour from huge (more than 2
  billion characters) input strings in _Py_dg_strtod.

4444 4445 4446
Library
-------

4447 4448
- Issue #20154: Deadlock in asyncio.StreamReader.readexactly().

4449 4450
- Issue #16113: Remove sha3 module again.

4451 4452
- Issue #20111: pathlib.Path.with_suffix() now sanity checks the given suffix.

4453 4454
- Fix breakage in TestSuite.countTestCases() introduced by issue #11798.

4455 4456
- Issue #20108: Avoid parameter name clash in inspect.getcallargs().

4457 4458
- Issue #19918: Fix PurePath.relative_to() under Windows.

4459 4460 4461
- Issue #19422: Explicitly disallow non-SOCK_STREAM sockets in the ssl
  module, rather than silently let them emit clear text data.

4462 4463 4464
- Issue #20046: Locale alias table no longer contains entities which can be
  calculated.  Generalized support of the euro modifier.

4465 4466
- Issue #20027: Fixed locale aliases for devanagari locales.

4467 4468
- Issue #20067: Tkinter variables now work when wantobjects is false.

4469 4470 4471
- Issue #19020: Tkinter now uses splitlist() instead of split() in configure
  methods.

4472 4473 4474 4475
- Issue #19744: ensurepip now provides a better error message when Python is
  built without SSL/TLS support (pip currently requires that support to run,
  even if only operating with local wheel files)

4476 4477 4478
- Issue #19734: ensurepip now ignores all pip environment variables to avoid
  odd behaviour based on user configuration settings

4479 4480
- Fix TypeError on "setup.py upload --show-response".

4481 4482
- Issue #20045: Fix "setup.py register --list-classifiers".

4483 4484 4485
- Issue #18879: When a method is looked up on a temporary file, avoid closing
  the file before the method is possibly called.

4486 4487 4488
- Issue #20037: Avoid crashes when opening a text file late at interpreter
  shutdown.

4489 4490 4491 4492 4493 4494 4495 4496 4497 4498 4499 4500 4501 4502
- Issue #19967: Thanks to the PEP 442, asyncio.Future now uses a
  destructor to log uncaught exceptions, instead of the dedicated
  _TracebackLogger class.

- Added a Task.current_task() class method to asyncio.

- Issue #19850: Set SA_RESTART in asyncio when registering a signal
  handler to limit EINTR occurrences.

- Implemented write flow control in asyncio for proactor event loop (Windows).

- Change write buffer in asyncio use to avoid O(N**2) behavior.  Make
  write()/sendto() accept bytearray/memoryview.

4503 4504 4505
- Issue #20034: Updated alias mapping to most recent locale.alias file
  from X.org distribution using makelocalealias.py.

4506 4507 4508
- Issue #5815: Fixed support for locales with modifiers.  Fixed support for
  locale encodings with hyphens.

4509 4510 4511
- Issue #20026: Fix the sqlite module to handle correctly invalid isolation
  level (wrong type).

4512 4513 4514
- Issue #18829: csv.Dialect() now checks type for delimiter, escapechar and
  quotechar fields.  Original patch by Vajrasky Kok.

4515 4516 4517 4518
- Issue #19855: uuid.getnode() on Unix now looks on the PATH for the
  executables used to find the mac address, with /sbin and /usr/sbin as
  fallbacks.

4519 4520 4521
- Issue #20007: HTTPResponse.read(0) no more prematurely closes connection.
  Original patch by Simon Sapin.

4522 4523 4524 4525 4526 4527
- Issue #19946: multiprocessing now uses runpy to initialize __main__ in
  child processes when necessary, allowing it to correctly handle scripts
  without suffixes and submodules that use explicit relative imports or
  otherwise rely on parent modules being correctly imported prior to
  execution.

4528 4529 4530 4531
- Issue #19921: When Path.mkdir() is called with parents=True, any missing
  parent is created with the default permissions, ignoring the mode argument
  (mimicking the POSIX "mkdir -p" command).

4532 4533 4534
- Issue #19887: Improve the Path.resolve() algorithm to support certain
  symlink chains.

4535 4536
- Issue #19912: Fixed numerous bugs in ntpath.splitunc().

4537 4538 4539
- Issue #19911: ntpath.splitdrive() now correctly processes the 'İ' character
  (U+0130, LATIN CAPITAL LETTER I WITH DOT ABOVE).

4540 4541 4542
- Issue #19532: python -m compileall with no filename/directory arguments now
  respects the -f and -q flags instead of ignoring them.

4543 4544
- Issue #19623: Fixed writing to unseekable files in the aifc module.

4545 4546 4547
- Issue #19946: multiprocessing.spawn now raises ImportError when the module to
  be used as the main module cannot be imported.

4548 4549
- Issue #17919: select.poll.register() again works with poll.POLLNVAL on AIX.
  Fixed integer overflow in the eventmask parameter.
4550

4551 4552 4553 4554 4555 4556 4557
- Issue #19063: if a Charset's body_encoding was set to None, the email
  package would generate a message claiming the Content-Transfer-Encoding
  was 7bit, and produce garbage output for the content.  This now works.
  A couple of other set_payload mishandlings of non-ASCII are also fixed.
  In addition, calling set_payload with a string argument without
  specifying a charset now raises an error (this is a new error in 3.4).

4558 4559
- Issue #15475: Add __sizeof__ implementations for itertools objects.

4560 4561 4562
- Issue #19944: Fix importlib.find_spec() so it imports parents as needed
  and move the function to importlib.util.

4563 4564 4565
- Issue #19880: Fix a reference leak in unittest.TestCase. Explicitly break
  reference cycles between frames and the _Outcome instance.

4566 4567 4568 4569 4570 4571
- Issue #17429: platform.linux_distribution() now decodes files from the UTF-8
  encoding with the surrogateescape error handler, instead of decoding from the
  locale encoding in strict mode. It fixes the function on Fedora 19 which is
  probably the first major distribution release with a non-ASCII name. Patch
  written by Toshio Kuratomi.

4572 4573 4574
- Issue #19343: Expose FreeBSD-specific APIs in resource module.  Original
  patch by Koobs.

4575 4576 4577 4578
- Issue #19929: Call os.read with 32768 within subprocess.Popen.communicate
  rather than 4096 for efficiency.  A microbenchmark shows Linux and OS X
  both using ~50% less cpu time this way.

4579 4580 4581
- Issue #19506: Use a memoryview to avoid a data copy when piping data
  to stdin within subprocess.Popen.communicate.  5-10% less cpu usage.

4582 4583 4584
- Issue #19876: selectors unregister() no longer raises ValueError or OSError
  if the FD is closed (as long as it was registered).

4585 4586
- Issue #19908: pathlib now joins relative Windows paths correctly when a drive
  is present.  Original patch by Antoine Pitrou.
4587

4588 4589
- Issue #19296: Silence compiler warning in dbm_open

4590 4591 4592 4593
- Issue #6784: Strings from Python 2 can now be unpickled as bytes
  objects by setting the encoding argument of Unpickler to be 'bytes'.
  Initial patch by Merlijn van Deen.

4594
- Issue #19839: Fix regression in bz2 module's handling of non-bzip2 data at
4595
  EOF, and analogous bug in lzma module.
4596

4597 4598 4599
- Issue #19881: Fix pickling bug where cpickle would emit bad pickle data for
  large bytes string (i.e., with size greater than 2**32-1).

4600 4601 4602 4603
- Issue #19138: doctest's IGNORE_EXCEPTION_DETAIL now allows a match when
  no exception detail exists (no colon following the exception's name, or
  a colon does follow but no text follows the colon).

4604 4605
- Issue #19927: Add __eq__ to path-based loaders in importlib.

4606 4607 4608 4609
- Issue #19827: On UNIX, setblocking() and settimeout() methods of
  socket.socket can now avoid a second syscall if the ioctl() function can be
  used, or if the non-blocking flag of the socket is unchanged.

4610 4611 4612
- Issue #19785: smtplib now supports SSLContext.check_hostname and server name
  indication for TLS/SSL connections.

4613 4614 4615
- Issue #19784: poplib now supports SSLContext.check_hostname and server name
  indication for TLS/SSL connections.

4616 4617 4618
- Issue #19783: nntplib now supports SSLContext.check_hostname and server name
  indication for TLS/SSL connections.

4619 4620 4621
- Issue #19782: imaplib now supports SSLContext.check_hostname and server name
  indication for TLS/SSL connections.

4622
- Issue #20123: Fix pydoc.synopsis() for "binary" modules.
4623

4624 4625
- Issue #19834: Support unpickling of exceptions pickled by Python 2.

4626 4627 4628
- Issue #19781: ftplib now supports SSLContext.check_hostname and server name
  indication for TLS/SSL connections.

4629 4630 4631
- Issue #19509: Add SSLContext.check_hostname to match the peer's certificate
  with server_hostname on handshake.

4632 4633 4634
- Issue #15798: Fixed subprocess.Popen() to no longer fail if file
  descriptor 0, 1 or 2 is closed.

4635 4636
- Issue #17897: Optimized unpickle prefetching.

4637 4638 4639 4640
- Issue #3693: Make the error message more helpful when the array.array()
  constructor is given a str. Move the array module typecode documentation to
  the docstring of the constructor.

4641 4642 4643
- Issue #19088: Fixed incorrect caching of the copyreg module in
  object.__reduce__() and object.__reduce_ex__().

4644 4645 4646
- Issue #19698: Removed exec_module() methods from
  importlib.machinery.BuiltinImporter and ExtensionFileLoader.

4647 4648
- Issue #18864: Added a setter for ModuleSpec.has_location.

4649 4650 4651
- Fixed _pickle.Unpickler to not fail when loading empty strings as
  persistent IDs.

4652 4653 4654
- Issue #11480: Fixed copy.copy to work with classes with custom metaclasses.
  Patch by Daniel Urban.

4655 4656 4657
- Issue #6477: Added support for pickling the types of built-in singletons
  (i.e., Ellipsis, NotImplemented, None).

4658 4659
- Issue #19713: Add remaining PEP 451-related deprecations and move away
  from using find_module/find_loaer/load_module.
4660

4661 4662
- Issue #19708: Update pkgutil to use the new importer APIs.

4663 4664
- Issue #19703: Update pydoc to use the new importer APIs.

4665 4666
- Issue #19851: Fixed a regression in reloading sub-modules.

4667 4668
- ssl.create_default_context() sets OP_NO_COMPRESSION to prevent CRIME.

4669 4670
- Issue #19802: Add socket.SO_PRIORITY.

4671 4672 4673
- Issue #11508: Fixed uuid.getnode() and uuid.uuid1() on environment with
  virtual interface.  Original patch by Kent Frazier.

4674 4675
- Issue #11489: JSON decoder now accepts lone surrogates.

4676 4677 4678
- Issue #19545: Avoid chained exceptions while passing stray % to
  time.strptime().  Initial patch by Claudiu Popa.

4679 4680 4681
IDLE
----

4682 4683
- Issue #20058: sys.stdin.readline() in IDLE now always returns only one line.

4684 4685 4686 4687
- Issue #19481: print() of string subclass instance in IDLE no longer hangs.

- Issue #18270: Prevent possible IDLE AttributeError on OS X when no initial
  shell window is present.
4688

Zachary Ware's avatar
Zachary Ware committed
4689 4690
Tests
-----
4691

4692 4693 4694
- Issue #20055: Fix test_shutil under Windows with symlink privileges held.
  Patch by Vajrasky Kok.

4695 4696 4697
- Issue #20070: Don't run test_urllib2net when network resources are not
  enabled.

4698 4699 4700
- Issue #19938: Re-enabled test_bug_1333982 in test_dis, which had been
  disabled since 3.0 due to the changes in listcomp handling.

4701 4702
- Issue #19320: test_tcl no longer fails when wantobjects is false.

4703
- Issue #19919: Fix flaky SSL test. connect_ex() sometimes returns
4704 4705
  EWOULDBLOCK on Windows or VMs hosted on Windows.

4706 4707
- Issue #19912: Added tests for ntpath.splitunc().

4708 4709
- Issue #19828: Fixed test_site when the whole suite is run with -S.

4710 4711
- Issue #19928: Implemented a test for repr() of cell objects.

4712 4713
- Issue #19535: Fixed test_docxmlrpc, test_functools, test_inspect, and
  test_statistics when python is run with -OO.
4714

4715 4716 4717
- Issue #19926: Removed unneeded test_main from test_abstract_numbers.
  Patch by Vajrasky Kok.

4718
- Issue #19572: More skipped tests explicitly marked as skipped.
4719

4720
- Issue #19595, #19987: Re-enabled a long-disabled test in test_winsound.
4721

Zachary Ware's avatar
Zachary Ware committed
4722 4723
- Issue #19588: Fixed tests in test_random that were silently skipped most
  of the time.  Patch by Julian Gindi.
4724

4725 4726
Build
-----
4727

4728 4729
- Issue #19728: Enable pip installation by default on Windows.

4730 4731
- Issue #16136: Remove VMS support

4732 4733 4734
- Issue #18215: Add script Tools/ssl/test_multiple_versions.py to compile and
  run Python's unit tests with multiple versions of OpenSSL.

4735 4736 4737
- Issue #19922: define _INCLUDE__STDC_A1_SOURCE in HP-UX to include mbstate_t
  for mbrtowc().

4738 4739 4740
- Issue #19788: kill_python(_d).exe is now run as a PreBuildEvent on the
  pythoncore sub-project.  This should prevent build errors due a previous
  build's python(_d).exe still running.
4741

4742 4743
Documentation
-------------
Tim Golden's avatar
Tim Golden committed
4744

4745 4746
- Issue #20265: Updated some parts of the Using Windows document.

4747 4748 4749
- Issue #20266: Updated some parts of the Windows FAQ.

- Issue #20255: Updated the about and bugs pages.
4750

4751 4752 4753
- Issue #20253: Fixed a typo in the ipaddress docs that advertised an
  illegal attribute name.  Found by INADA Naoki.

4754
- Issue #18840: Introduce the json module in the tutorial, and de-emphasize
4755
  the pickle module.
4756

4757
- Issue #19845: Updated the Compiling Python on Windows section.
4758

4759
- Issue #19795: Improved markup of True/False constants.
4760

4761 4762 4763
Tools/Demos
-----------

4764 4765
- Issue #19659: Added documentation for Argument Clinic.

4766 4767
- Issue #19976: Argument Clinic METH_NOARGS functions now always
  take two parameters.
4768

4769

4770
What's New in Python 3.4.0 Beta 1?
4771
==================================
4772

4773
Release date: 2013-11-24
4774 4775 4776

Core and Builtins
-----------------
4777

4778 4779
- Use the repr of a module name in more places in import, especially
  exceptions.
4780

4781 4782 4783 4784 4785 4786
- Issue #19619: str.encode, bytes.decode and bytearray.decode now use an
  internal API to throw LookupError for known non-text encodings, rather
  than attempting the encoding or decoding operation and then throwing a
  TypeError for an unexpected output type. (The latter mechanism remains
  in place for third party non-text encodings)

4787 4788 4789
- Issue #19183: Implement PEP 456 'secure and interchangeable hash algorithm'.
  Python now uses SipHash24 on all major platforms.

4790 4791 4792 4793 4794 4795
- Issue #12892: The utf-16* and utf-32* encoders no longer allow surrogate code
  points (U+D800-U+DFFF) to be encoded.  The utf-32* decoders no longer decode
  byte sequences that correspond to surrogate code points.  The surrogatepass
  error handler now works with the utf-16* and utf-32* codecs.  Based on
  patches by Victor Stinner and Kang-Hao (Kenny) Lu.

4796 4797 4798
- Issue #17806: Added keyword-argument support for "tabsize" to
  str/bytes.expandtabs().

4799 4800 4801 4802 4803 4804 4805 4806 4807
- Issue #17828: Output type errors in str.encode(), bytes.decode() and
  bytearray.decode() now direct users to codecs.encode() or codecs.decode()
  as appropriate.

- Issue #17828: The interpreter now attempts to chain errors that occur in
  codec processing with a replacement exception of the same type that
  includes the codec name in the error message. It ensures it only does this
  when the creation of the replacement exception won't lose any information.

4808 4809 4810 4811
- Issue #19466: Clear the frames of daemon threads earlier during the
  Python shutdown to call objects destructors. So "unclosed file" resource
  warnings are now corretly emitted for daemon threads.

4812
- Issue #19514: Deduplicate some _Py_IDENTIFIER declarations.
4813 4814
  Patch by Andrei Dorian Duma.

4815 4816 4817
- Issue #17936: Fix O(n**2) behaviour when adding or removing many subclasses
  of a given type.

4818 4819 4820
- Issue #19428: zipimport now handles errors when reading truncated or invalid
  ZIP archive.

4821 4822 4823 4824
- Issue #18408: Add a new PyFrame_FastToLocalsWithError() function to handle
  exceptions when merging fast locals into f_locals of a frame.
  PyEval_GetLocals() now raises an exception and return NULL on failure.

4825 4826
- Issue #19369: Optimized the usage of __length_hint__().

4827 4828 4829
- Issue #18603: Ensure that PyOS_mystricmp and PyOS_mystrnicmp are in the
  Python executable and not removed by the linker's optimizer.

4830
- Issue #19306: Add extra hints to the faulthandler module's stack
4831 4832
  dumps that these are "upside down".

4833 4834
Library
-------
4835

4836 4837 4838
- Issue #3158: doctest can now find doctests in functions and methods
  written in C.

4839 4840 4841
- Issue #13477: Added command line interface to the tarfile module.
  Original patch by Berker Peksag.

4842 4843 4844
- Issue #19674: inspect.signature() now produces a correct signature
  for some builtins.

4845 4846
- Issue #19722: Added opcode.stack_effect(), which
  computes the stack effect of bytecode instructions.
4847

4848 4849 4850 4851
- Issue #19735: Implement private function ssl._create_stdlib_context() to
  create SSLContext objects in Python's stdlib module. It provides a single
  configuration point and makes use of SSLContext.load_default_certs().

4852 4853 4854 4855
- Issue #16203: Add re.fullmatch() function and regex.fullmatch() method,
  which anchor the pattern at both ends of the string to match.
  Original patch by Matthew Barnett.

4856 4857 4858
- Issue #13592: Improved the repr for regular expression pattern objects.
  Based on patch by Hugo Lopes Tavares.

4859 4860 4861
- Issue #19641: Added the audioop.byteswap() function to convert big-endian
  samples to little-endian and vice versa.

4862 4863
- Issue #15204: Deprecated the 'U' mode in file-like objects.

4864 4865
- Issue #17810: Implement PEP 3154, pickle protocol 4.

4866 4867
- Issue #19668: Added support for the cp1125 encoding.

4868 4869 4870
- Issue #19689: Add ssl.create_default_context() factory function. It creates
  a new SSLContext object with secure default settings.

4871 4872 4873
- Issue #19727: os.utime(..., None) is now potentially more precise
  under Windows.

4874 4875 4876
- Issue #17201: ZIP64 extensions now are enabled by default.  Patch by
  William Mallard.

4877 4878 4879 4880
- Issue #19292: Add SSLContext.load_default_certs() to load default root CA
  certificates from default stores or system stores. By default the method
  loads CA certs for authentication of server certs.

4881 4882
- Issue #19673: Add pathlib to the stdlib as a provisional module (PEP 428).

4883 4884 4885 4886
- Issue #16596: pdb in a generator now properly skips over yield and
  yield from rather than stepping out of the generator into its
  caller.  (This is essential for stepping through asyncio coroutines.)

4887 4888 4889 4890
- Issue #17916: Added dis.Bytecode.from_traceback() and
  dis.Bytecode.current_offset to easily display "current instruction"
  markers in the new disassembly API (Patch by Claudiu Popa).

4891 4892
- Issue #19552: venv now supports bootstrapping pip into virtual environments

4893 4894 4895 4896
- Issue #17134: Finalize interface to Windows' certificate store. Cert and
  CRL enumeration are now two functions. enum_certificates() also returns
  purpose flags as set of OIDs.

4897 4898
- Issue #19555: Restore sysconfig.get_config_var('SO'), (and the distutils
  equivalent) with a DeprecationWarning pointing people at $EXT_SUFFIX.
4899

4900 4901 4902 4903
- Issue #8813: Add SSLContext.verify_flags to change the verification flags
  of the context in order to enable certification revocation list (CRL)
  checks or strict X509 rules.

4904 4905
- Issue #18294: Fix the zlib module to make it 64-bit safe.

4906 4907 4908
- Issue #19682: Fix compatibility issue with old version of OpenSSL that
  was introduced by Issue #18379.

4909 4910
- Issue #14455: plistlib now supports binary plists and has an updated API.

4911 4912
- Issue #19633: Fixed writing not compressed 16- and 32-bit wave files on
  big-endian platforms.
4913

4914 4915 4916
- Issue #18379: SSLSocket.getpeercert() returns CA issuer AIA fields, OCSP
  and CRL distribution points.

4917 4918 4919 4920
- Issue #18138: Implement cadata argument of SSLContext.load_verify_location()
  to load CA certificates and CRL from memory. It supports PEM and DER
  encoded strings.

4921 4922 4923
- Issue #18775: Add name and block_size attribute to HMAC object. They now
  provide the same API elements as non-keyed cryptographic hash functions.

4924 4925 4926
- Issue #17276: MD5 as default digestmod for HMAC is deprecated. The HMAC
  module supports digestmod names, e.g. hmac.HMAC('sha1').

4927 4928
- Issue #19449: in csv's writerow, handle non-string keys when generating the
  error message that certain keys are not in the 'fieldnames' list.
4929

4930 4931 4932
- Issue #13633: Added a new convert_charrefs keyword arg to HTMLParser that,
  when True, automatically converts all character references.

4933 4934
- Issue #2927: Added the unescape() function to the html module.

4935 4936
- Issue #8402: Added the escape() function to the glob module.

4937 4938
- Issue #17618: Add Base85 and Ascii85 encoding/decoding to the base64 module.

4939 4940 4941
- Issue #19634: time.strftime("%y") now raises a ValueError on AIX when given a
  year before 1900.

4942 4943 4944
- Fix test.support.bind_port() to not cause an error when Python was compiled
  on a system with SO_REUSEPORT defined in the headers but run on a system
  with an OS kernel that does not support that reasonably new socket option.
4945

4946
- Fix compilation error under gcc of the ctypes module bundled libffi for arm.
4947

4948 4949 4950
- Issue #19448: Add private API to SSL module to lookup ASN.1 objects by OID,
  NID, short name and long name.

4951
- Issue #19282: dbm.open now supports the context management protocol. (Inital
4952 4953
  patch by Claudiu Popa)

4954
- Issue #8311: Added support for writing any bytes-like objects in the aifc,
4955 4956
  sunau, and wave modules.

4957 4958
- Issue #5202: Added support for unseekable files in the wave module.

4959 4960 4961 4962
- Issue #19544 and Issue #1180: Restore global option to ignore
  ~/.pydistutils.cfg in Distutils, accidentally removed in backout of
  distutils2 changes.

4963
- Issue #19523: Closed FileHandler leak which occurred when delay was set.
4964

4965 4966 4967
- Issue #19544 and Issue #6516: Restore support for --user and --group
  parameters to sdist command accidentally rolled back as part of the
  distutils2 rollback.
4968

Tim Golden's avatar
Tim Golden committed
4969 4970 4971
- Issue #13674: Prevented time.strftime from crashing on Windows when given
  a year before 1900 and a format of %y.

4972 4973 4974
- Issue #19406: implementation of the ensurepip module (part of PEP 453).
  Patch by Donald Stufft and Nick Coghlan.

4975 4976 4977
- Issue #19544 and Issue #6286: Restore use of urllib over http allowing use
  of http_proxy for Distutils upload command, a feature accidentally lost
  in the rollback of distutils2.
4978

4979 4980 4981
- Issue #19544 and Issue #7457: Restore the read_pkg_file method to
  distutils.dist.DistributionMetadata accidentally removed in the undo of
  distutils2.
4982

4983 4984 4985
- Issue #16685: Added support for any bytes-like objects in the audioop module.
  Removed support for strings.

4986 4987 4988
- Issue #7171: Add Windows implementation of ``inet_ntop`` and ``inet_pton``
  to socket module. Patch by Atsuo Ishimoto.

4989 4990
- Issue #19261: Added support for writing 24-bit samples in the sunau module.

4991 4992 4993
- Issue #1097797: Added CP273 encoding, used on IBM mainframes in
  Germany and Austria.  Mapping provided by Michael Bierenfeld.

4994
- Issue #1575020: Fixed support of 24-bit wave files on big-endian platforms.
4995

4996 4997 4998 4999 5000 5001 5002 5003 5004 5005 5006 5007 5008 5009
- Issue #19378: Fixed a number of cases in the dis module where the new
  "file" parameter was not being honoured correctly

- Issue #19378: Removed the "dis.Bytecode.show_info" method

- Issue #19378: Renamed the "dis.Bytecode.display_code" method to
  "dis.Bytecode.dis" and converted it to returning a string rather than
  printing output.

- Issue #19378: the "line_offset" parameter in the new "dis.get_instructions"
  API has been renamed to "first_line" (and the default value and usage
  changed accordingly). This should reduce confusion with the more common use
  of "offset" in the dis docs to refer to bytecode offsets.

5010 5011 5012 5013
- Issue #18678: Corrected spwd struct member names in spwd module:
  sp_nam->sp_namp, and sp_pwd->sp_pwdp.  The old names are kept as extra
  structseq members, for backward compatibility.

5014 5015 5016
- Issue #6157: Fixed tkinter.Text.debug().  tkinter.Text.bbox() now raises
  TypeError instead of TclError on wrong number of arguments.  Original patch
  by Guilherme Polo.
5017

5018 5019
- Issue #10197: Rework subprocess.get[status]output to use subprocess
  functionality and thus to work on Windows. Patch by Nick Coghlan
5020

5021 5022
- Issue #6160: The bbox() method of tkinter.Spinbox now returns a tuple of
  integers instead of a string.  Based on patch by Guilherme Polo.
5023

5024 5025
- Issue #19403: contextlib.redirect_stdout is now reentrant

5026 5027
- Issue #19286: Directories in ``package_data`` are no longer added to
  the filelist, preventing failure outlined in the ticket.
5028

Ezio Melotti's avatar
Ezio Melotti committed
5029 5030
- Issue #19480: HTMLParser now accepts all valid start-tag names as defined
  by the HTML5 standard.
5031

5032 5033 5034
- Issue #15114: The html.parser module now raises a DeprecationWarning when the
  strict argument of HTMLParser or the HTMLParser.error method are used.

5035 5036 5037
- Issue #19410: Undo the special-casing removal of '' for
  importlib.machinery.FileFinder.

5038 5039 5040
- Issue #19424: Fix the warnings module to accept filename containing surrogate
  characters.

Benjamin Peterson's avatar
Benjamin Peterson committed
5041
- Issue #19435: Fix directory traversal attack on CGIHttpRequestHandler.
5042

5043 5044 5045
- Issue #19227: Remove pthread_atfork() handler. The handler was added to
  solve #18747 but has caused issues.

5046 5047 5048
- Issue #19420: Fix reference leak in module initalization code of
  _hashopenssl.c

5049 5050
- Issue #19329: Optimized compiling charsets in regular expressions.

5051 5052 5053
- Issue #19227: Try to fix deadlocks caused by re-seeding then OpenSSL
  pseudo-random number generator on fork().

5054 5055 5056
- Issue #16037: HTTPMessage.readheaders() raises an HTTPException when more than
  100 headers are read.  Adapted from patch by Jyrki Pulliainen.

5057 5058 5059 5060
- Issue #16040: CVE-2013-1752: nntplib: Limit maximum line lengths to 2048 to
  prevent readline() calls from consuming too much memory.  Patch by Jyrki
  Pulliainen.

5061 5062 5063 5064
- Issue #16041: CVE-2013-1752: poplib: Limit maximum line lengths to 2048 to
  prevent readline() calls from consuming too much memory.  Patch by Jyrki
  Pulliainen.

5065 5066 5067 5068
- Issue #17997: Change behavior of ``ssl.match_hostname()`` to follow RFC 6125,
  for security reasons.  It now doesn't match multiple wildcards nor wildcards
  inside IDN fragments.

5069 5070 5071
- Issue #16039: CVE-2013-1752: Change use of readline in imaplib module to limit
  line length.  Patch by Emil Lind.

5072 5073 5074 5075 5076
- Issue #19330: the unnecessary wrapper functions have been removed from the
  implementations of the new contextlib.redirect_stdout and
  contextlib.suppress context managers, which also ensures they provide
  reasonable help() output on instances

Benjamin Peterson's avatar
Benjamin Peterson committed
5077 5078
- Issue #19393: Fix symtable.symtable function to not be confused when there are
  functions or classes named "top".
5079

5080 5081
- Issue #18685: Restore re performance to pre-PEP 393 levels.

5082 5083
- Issue #19339: telnetlib module is now using time.monotonic() when available
  to compute timeout.
5084

5085 5086
- Issue #19399: fix sporadic test_subprocess failure.

5087 5088 5089
- Issue #13234: Fix os.listdir to work with extended paths on Windows.
  Patch by Santoso Wijaya.

5090 5091 5092
- Issue #19375: The site module adding a "site-python" directory to sys.path,
  if it exists, is now deprecated.

5093 5094 5095
- Issue #19379: Lazily import linecache in the warnings module, to make
  startup with warnings faster until a warning gets printed.

5096 5097 5098 5099 5100 5101
- Issue #19288: Fixed the "in" operator of dbm.gnu databases for string
  argument.  Original patch by Arfrever Frehtes Taifersar Arahesis.

- Issue #19287: Fixed the "in" operator of dbm.ndbm databases for string
  argument.  Original patch by Arfrever Frehtes Taifersar Arahesis.

5102
- Issue #19327: Fixed the working of regular expressions with too big charset.
5103

5104 5105 5106
- Issue #17400: New 'is_global' attribute for ipaddress to tell if an address
  is allocated by IANA for global or private networks.

5107 5108
- Issue #19350: Increasing the test coverage of macurl2path. Patch by Colin
  Williams.
5109

5110 5111 5112
- Issue #19365: Optimized the parsing of long replacement string in re.sub*()
  functions.

5113 5114
- Issue #19352: Fix unittest discovery when a module can be reached
  through several paths (e.g. under Debian/Ubuntu with virtualenv).
5115

5116 5117
- Issue #15207: Fix mimetypes to read from correct part of Windows registry
  Original patch by Dave Chambers
5118

5119 5120
- Issue #16595: Add prlimit() to resource module.

5121 5122
- Issue #19324: Expose Linux-specific constants in resource module.

5123 5124
- Load SSL's error strings in hashlib.

5125 5126
- Issue #18527: Upgrade internal copy of zlib to 1.2.8.

5127 5128
- Issue #19274: Add a filterfunc parameter to PyZipFile.writepy.

5129 5130 5131
- Issue #8964: fix platform._sys_version to handle IronPython 2.6+.
  Patch by Martin Matusiak.

5132 5133
- Issue #19413: Restore pre-3.3 reload() semantics of re-finding modules.

5134 5135 5136 5137 5138 5139 5140 5141 5142 5143 5144 5145
- Issue #18958: Improve error message for json.load(s) while passing a string
  that starts with a UTF-8 BOM.

- Issue #19307: Improve error message for json.load(s) while passing objects
  of the wrong type.

- Issue #16038: CVE-2013-1752: ftplib: Limit amount of data read by
  limiting the call to readline().  Original patch by Michał
  Jastrzębski and Giampaolo Rodola.

- Issue #17087: Improved the repr for regular expression match objects.

5146 5147 5148
Tests
-----

5149 5150 5151
- Issue #19664: test_userdict's repr test no longer depends on the order
  of dict elements.

5152 5153 5154 5155
- Issue #19440: Clean up test_capi by removing an unnecessary __future__
  import, converting from test_main to unittest.main, and running the
  _testcapi module tests as subTests of a unittest TestCase method.

5156 5157 5158 5159 5160 5161
- Issue #19378: the main dis module tests are now run with both stdout
  redirection *and* passing an explicit file parameter

- Issue #19378: removed the not-actually-helpful assertInstructionMatches
  and assertBytecodeExactlyMatches helpers from bytecode_helper

5162 5163
- Issue #18702: All skipped tests now reported as skipped.

5164 5165 5166
- Issue #19439: interpreter embedding tests are now executed on Windows
  (Patch by Zachary Ware)

5167 5168
- Issue #19085: Added basic tests for all tkinter widget options.

5169
- Issue #19384: Fix test_py_compile for root user, patch by Claudiu Popa.
5170

Zachary Ware's avatar
Zachary Ware committed
5171 5172
Documentation
-------------
5173

Zachary Ware's avatar
Zachary Ware committed
5174 5175 5176
- Issue #18326: Clarify that list.sort's arguments are keyword-only.  Also,
  attempt to reduce confusion in the glossary by not saying there are
  different "types" of arguments and parameters.
5177

5178 5179
Build
-----
5180

5181 5182 5183
- Issue #19358: "make clinic" now runs the Argument Clinic preprocessor
  over all CPython source files.

Martin v. Löwis's avatar
Martin v. Löwis committed
5184
- Update SQLite to 3.8.1, xz to 5.0.5, and Tcl/Tk to 8.6.1 on Windows.
5185

5186 5187
- Issue #16632: Enable DEP and ASLR on Windows.

5188 5189
- Issue #17791: Drop PREFIX and EXEC_PREFIX definitions from PC/pyconfig.h

5190 5191 5192
- Add workaround for VS 2010 nmake clean issue. VS 2010 doesn't set up PATH
  for nmake.exe correctly.

5193 5194
- Issue #19550: Implement Windows installer changes of PEP 453 (ensurepip).

5195 5196
- Issue #19520: Fix compiler warning in the _sha3 module on 32bit Windows.

5197 5198
- Issue #19356: Avoid using a C variabled named "_self", it's a reserved
  word in some C compilers.
5199

5200 5201
- Issue #15792: Correct build options on Win64. Patch by Jeremy Kloth.

5202 5203 5204
- Issue #19373: Apply upstream change to Tk 8.5.15 fixing OS X 10.9
  screen refresh problem for OS X installer build.

5205 5206 5207 5208 5209 5210
- Issue #19649: On OS X, the same set of file names are now installed
  in bin directories for all configurations: non-framework vs framework,
  and single arch vs universal builds.  pythonx.y-32 is now always
  installed for 64-bit/32-bit universal builds.  The obsolete and
  undocumented pythonw* symlinks are no longer installed anywhere.

5211 5212 5213 5214
- Issue #19553: PEP 453 - "make install" and "make altinstall" now install or
  upgrade pip by default, using the bundled pip provided by the new ensurepip
  module.  A new configure option, --with-ensurepip[=upgrade|install|no], is
  available to override the default ensurepip "--upgrade" option.  The option
5215
  can also be set with "make [alt]install ENSUREPIP=[upgrade|install|no]".
5216

5217 5218
- Issue #19551: PEP 453 - the OS X installer now installs pip by default.

5219 5220
- Update third-party libraries for OS X installers: xz 5.0.3 -> 5.0.5,
  SQLite 3.7.13 -> 3.8.1
5221

5222 5223 5224 5225 5226
- Issue #15663: Revert OS X installer built-in Tcl/Tk support for 3.4.0b1.
  Some third-party projects, such as Matplotlib and PIL/Pillow,
  depended on being able to build with Tcl and Tk frameworks in
  /Library/Frameworks.

5227 5228
Tools/Demos
-----------
5229

5230 5231 5232
- Issue #19730: Argument Clinic now supports all the existing PyArg
  "format units" as legacy converters, as well as two new features:
  "self converters" and the "version" directive.
5233

5234 5235 5236
- Issue #19552: pyvenv now bootstraps pip into virtual environments by
  default (pass --without-pip to request the old behaviour)

5237 5238
- Issue #19390: Argument Clinic no longer accepts malformed Python
  and C ids.
5239

5240

5241
What's New in Python 3.4.0 Alpha 4?
5242
===================================
5243

Larry Hastings's avatar
Larry Hastings committed
5244
Release date: 2013-10-20
5245 5246 5247 5248

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

5249 5250 5251
- Issue #19301: Give classes and functions that are explicitly marked global a
  global qualname.

Andrew Kuchling's avatar
Andrew Kuchling committed
5252
- Issue #19279: UTF-7 decoder no longer produces illegal strings.
5253

5254 5255 5256
- Issue #16612: Add "Argument Clinic", a compile-time preprocessor for
  C files to generate argument parsing code.  (See PEP 436.)

5257 5258 5259 5260 5261
- Issue #18810: Shift stat calls in importlib.machinery.FileFinder such that
  the code is optimistic that if something exists in a directory named exactly
  like the possible package being searched for that it's in actuality a
  directory.

5262 5263 5264 5265 5266 5267 5268
- Issue #18416: importlib.machinery.PathFinder now treats '' as the cwd and
  importlib.machinery.FileFinder no longer special-cases '' to '.'. This leads
  to modules imported from cwd to now possess an absolute file path for
  __file__ (this does not affect modules specified by path on the CLI but it
  does affect -m/runpy). It also allows FileFinder to be more consistent by not
  having an edge case.

5269 5270 5271
- Issue #4555: All exported C symbols are now prefixed with either
  "Py" or "_Py".

5272 5273 5274
- Issue #19219: Speed up marshal.loads(), and make pyc files slightly
  (5% to 10%) smaller.

5275 5276
- Issue #19221: Upgrade Unicode database to version 6.3.0.

5277 5278 5279 5280 5281
- Issue #16742: The result of the C callback PyOS_ReadlineFunctionPointer must
  now be a string allocated by PyMem_RawMalloc() or PyMem_RawRealloc() (or NULL
  if an error occurred), instead of a string allocated by PyMem_Malloc() or
  PyMem_Realloc().

5282 5283
- Issue #19199: Remove ``PyThreadState.tick_counter`` field

5284 5285 5286
- Fix macro expansion of _PyErr_OCCURRED(), and make sure to use it in at
  least one place so as to avoid regressions.

5287 5288 5289
- Issue #19087: Improve bytearray allocation in order to allow cheap popping
  of data at the front (slice deletion).

5290 5291
- Issue #19014: memoryview.cast() is now allowed on zero-length views.

5292 5293 5294
- Issue #18690: memoryview is now automatically registered with
  collections.abc.Sequence

5295 5296 5297
- Issue #19078: memoryview now correctly supports the reversed builtin
  (Patch by Claudiu Popa)

5298 5299 5300
Library
-------

5301 5302 5303
- Issue #17457: unittest test discovery now works with namespace packages.
  Patch by Claudiu Popa.

5304 5305
- Issue #18235: Fix the sysconfig variables LDSHARED and BLDSHARED under AIX.
  Patch by David Edelsohn.
5306

5307 5308 5309
- Issue #18606: Add the new "statistics" module (PEP 450).  Contributed
  by Steven D'Aprano.

5310 5311
- Issue #12866: The audioop module now supports 24-bit samples.

Christian Heimes's avatar
Christian Heimes committed
5312
- Issue #19254: Provide an optimized Python implementation of pbkdf2_hmac.
5313

5314 5315 5316
- Issues #19201, Issue #19222, Issue #19223: Add "x" mode (exclusive creation)
  in opening file to bz2, gzip and lzma modules. Patches by Tim Heaney and
  Vajrasky Kok.
5317

Brett Cannon's avatar
Brett Cannon committed
5318 5319
- Fix a reference count leak in _sre.

5320 5321 5322 5323 5324
- Issue #19262: Initial check in of the 'asyncio' package (a.k.a. Tulip,
  a.k.a. PEP 3156).  There are no docs yet, and the PEP is slightly
  out of date with the code.  This module will have *provisional* status
  in Python 3.4.

5325
- Issue #19276: Fixed the wave module on 64-bit big-endian platforms.
5326

5327 5328 5329
- Issue #19266: Rename the new-in-3.4 ``contextlib.ignore`` context manager
  to ``contextlib.suppress`` in order to be more consistent with existing
  descriptions of that operation elsewhere in the language and standard
5330
  library documentation (Patch by Zero Piraeus).
5331

5332 5333 5334
- Issue #18891: Completed the new email package (provisional) API additions
  by adding new classes EmailMessage, MIMEPart, and ContentManager.

Ethan Furman's avatar
Ethan Furman committed
5335 5336
- Issue #18281: Unused stat constants removed from `tarfile`.

5337 5338 5339
- Issue #18999: Multiprocessing now supports 'contexts' with the same API
  as the module, but bound to specified start methods.

5340 5341 5342 5343
- Issue #18468: The re.split, re.findall, and re.sub functions and the group()
  and groups() methods of match object now always return a string or a bytes
  object.

5344 5345
- Issue #18725: The textwrap module now supports truncating multiline text.

5346 5347 5348
- Issue #18776: atexit callbacks now display their full traceback when they
  raise an exception.

5349 5350 5351
- Issue #17827: Add the missing documentation for ``codecs.encode`` and
  ``codecs.decode``.

5352 5353 5354
- Issue #19218: Rename collections.abc to _collections_abc in order to
  speed up interpreter start.

5355 5356 5357
- Issue #18582: Add 'pbkdf2_hmac' to the hashlib module. It implements PKCS#5
  password-based key derivation functions with HMAC as pseudorandom function.

5358 5359
- Issue #19131: The aifc module now correctly reads and writes sampwidth of
  compressed streams.
5360

5361 5362 5363 5364
- Issue #19209: Remove import of copyreg from the os module to speed up
  interpreter startup. stat_result and statvfs_result are now hard-coded to
  reside in the os module.

5365
- Issue #19205: Don't import the 're' module in site and sysconfig module to
5366
  speed up interpreter start.
5367

5368 5369 5370
- Issue #9548: Add a minimal "_bootlocale" module that is imported by the
  _io module instead of the full locale module.

5371
- Issue #18764: Remove the 'print' alias for the PDB 'p' command so that it no
5372 5373
  longer shadows the print function.

5374
- Issue #19158: A rare race in BoundedSemaphore could allow .release() too
Tim Peters's avatar
Tim Peters committed
5375
  often.
5376

5377 5378
- Issue #15805: Add contextlib.redirect_stdout().

5379 5380
- Issue #18716: Deprecate the formatter module.

5381 5382 5383
- Issue #10712: 2to3 has a new "asserts" fixer that replaces deprecated names
  of unittest methods (e.g. failUnlessEqual -> assertEqual).

5384
- Issue #18037: 2to3 now escapes ``'\u'`` and ``'\U'`` in native strings.
5385

5386 5387 5388 5389
- Issue #17839: base64.decodebytes and base64.encodebytes now accept any
  object that exports a 1 dimensional array of bytes (this means the same
  is now also true for base64_codec)

5390 5391
- Issue #19132: The pprint module now supports compact mode.

5392 5393
- Issue #19137: The pprint module now correctly formats instances of set and
  frozenset subclasses.
5394

5395 5396 5397 5398
- Issue #10042: functools.total_ordering now correctly handles
  NotImplemented being returned by the underlying comparison function (Patch
  by Katie Miller)

Nick Coghlan's avatar
Nick Coghlan committed
5399 5400 5401
- Issue #19092: contextlib.ExitStack now correctly reraises exceptions
  from the __exit__ callbacks of inner context managers (Patch by Hrvoje
  Nikšić)
5402

5403 5404
- Issue #12641: Avoid passing "-mno-cygwin" to the mingw32 compiler, except
  when necessary.  Patch by Oscar Benjamin.
5405

5406 5407 5408 5409
- Issue #5845: In site.py, only load readline history from ~/.python_history
  if no history has been read already.  This avoids double writes to the
  history file at shutdown.

5410 5411
- Properly initialize all fields of a SSL object after allocation.

5412 5413 5414
- Issue #19095: SSLSocket.getpeercert() now raises ValueError when the
  SSL handshake hasn't been done.

5415 5416 5417
- Issue #4366: Fix building extensions on all platforms when --enable-shared
  is used.

5418 5419 5420 5421 5422
- Issue #19030: Fixed `inspect.getmembers` and `inspect.classify_class_attrs`
  to attempt activating descriptors before falling back to a __dict__ search
  for faulty descriptors.  `inspect.classify_class_attrs` no longer returns
  Attributes whose home class is None.

5423 5424 5425
C API
-----

5426 5427
- Issue #1772673: The type of `char*` arguments now changed to `const char*`.

5428 5429 5430 5431 5432
- Issue #16129: Added a `Py_SetStandardStreamEncoding` pre-initialization API
  to allow embedding applications like Blender to force a particular
  encoding and error handler for the standard IO streams (initial patch by
  Bastien Montagne)

5433 5434 5435
Tests
-----

5436 5437
- Issue #19275: Fix test_site on AMD64 Snow Leopard

5438 5439
- Issue #14407: Fix unittest test discovery in test_concurrent_futures.

5440 5441 5442
- Issue #18919: Unified and extended tests for audio modules: aifc, sunau and
  wave.

5443 5444
- Issue #18714: Added tests for ``pdb.find_function()``.

5445 5446 5447
Documentation
-------------

5448 5449
- Issue #18758: Fixed and improved cross-references.

5450 5451
- Issue #18972: Modernize email examples and use the argparse module in them.

5452 5453 5454 5455 5456
Build
-----

- Issue #19130: Correct PCbuild/readme.txt, Python 3.3 and 3.4 require VS 2010.

5457
- Issue #15663: Update OS X 10.6+ installer to use Tcl/Tk 8.5.15.
5458

5459 5460 5461 5462 5463 5464
- Issue #14499: Fix several problems with OS X universal build support:
    1. ppc arch detection for extension module builds broke with Xcode 5
    2. ppc arch detection in configure did not work on OS X 10.4
    3. -sysroot and -arch flags were unnecessarily duplicated
    4. there was no obvious way to configure an intel-32 only build.

5465 5466 5467 5468 5469
- Issue #19019: Change the OS X installer build script to use CFLAGS instead
  of OPT for special build options.  By setting OPT, some compiler-specific
  options like -fwrapv were overridden and thus not used, which could result
  in broken interpreters when building with clang.

5470

Larry Hastings's avatar
Larry Hastings committed
5471 5472 5473 5474 5475
What's New in Python 3.4.0 Alpha 3?
===================================

Release date: 2013-09-29

5476 5477 5478
Core and Builtins
-----------------

5479 5480
- Issue #18818: The "encodingname" part of PYTHONIOENCODING is now optional.

5481
- Issue #19098: Prevent overflow in the compiler when the recursion limit is set
Benjamin Peterson's avatar
Benjamin Peterson committed
5482
  absurdly high.
5483

5484 5485 5486
Library
-------

Ethan Furman's avatar
Ethan Furman committed
5487 5488 5489
- Issue #18929: `inspect.classify_class_attrs()` now correctly finds class
  attributes returned by `dir()` that are located in the metaclass.

5490 5491 5492 5493 5494 5495 5496
- Issue #18950: Fix miscellaneous bugs in the sunau module.
  Au_read.readframes() now updates current file position and reads correct
  number of frames from multichannel stream.  Au_write.writeframesraw() now
  correctly updates current file position.  Au_read.getnframes() now returns an
  integer (as in Python 2).  Au_read and Au_write now correctly works with file
  object if start file position is not a zero.

Raymond Hettinger's avatar
merge  
Raymond Hettinger committed
5497 5498 5499
- Issue #18594: The fast path for collections.Counter() was never taken
  due to an over-restrictive type check.

5500 5501 5502
- Issue #19053: ZipExtFile.read1() with non-zero argument no more returns empty
  bytes until end of data.

5503 5504 5505
- logging: added support for Unix domain sockets to SocketHandler and
  DatagramHandler.

5506 5507 5508
- Issue #18996: TestCase.assertEqual() now more cleverly shorten differing
  strings in error report.

5509 5510
- Issue #19034: repr() for tkinter.Tcl_Obj now exposes string reperesentation.

Jason R. Coombs's avatar
Jason R. Coombs committed
5511 5512 5513
- Issue #18978: ``urllib.request.Request`` now allows the method to be
  indicated on the class and no longer sets it to None in ``__init__``.

5514 5515 5516
- Issue #18626: the inspect module now offers a basic command line
  introspection interface (Initial patch by Claudiu Popa)

5517 5518 5519
- Issue #3015: Fixed tkinter with wantobject=False.  Any Tcl command call
  returned empty string.

5520 5521 5522 5523
- Issue #19037: The mailbox module now makes all changes to maildir files
  before moving them into place, to avoid race conditions with other programs
  that may be accessing the maildir directory.

5524 5525 5526 5527 5528
- Issue #14984: On POSIX systems, when netrc is called without a filename
  argument (and therefore is reading the user's $HOME/.netrc file), it now
  enforces the same security rules as typical ftp clients: the .netrc file must
  be owned by the user that owns the process and must not be readable by any
  other user.
5529

5530 5531
- Issue #18873: The tokenize module now detects Python source code encoding
  only in comment lines.
5532

5533 5534 5535
- Issue #17764: Enable http.server to bind to a user specified network
  interface.  Patch contributed by Malte Swart.

5536 5537
- Issue #18937: Add an assertLogs() context manager to unittest.TestCase
  to ensure that a block of code emits a message using the logging module.
5538

5539 5540
- Issue #17324: Fix http.server's request handling case on trailing '/'. Patch
  contributed by Vajrasky Kok.
5541

Raymond Hettinger's avatar
merge  
Raymond Hettinger committed
5542 5543
- Issue #19018: The heapq.merge() function no longer suppresses IndexError
  in the underlying iterables.
5544

R David Murray's avatar
R David Murray committed
5545 5546 5547
- Issue #18784: The uuid module no longer attempts to load libc via ctypes.CDLL
  if all the necessary functions have already been found in libuuid.  Patch by
  Evgeny Sologubov.
5548

5549 5550 5551 5552
- The :envvar:`PYTHONFAULTHANDLER` environment variable now only enables the
  faulthandler module if the variable is non-empty. Same behaviour than other
  variables like :envvar:`PYTHONDONTWRITEBYTECODE`.

5553 5554 5555 5556
- Issue #1565525: New function ``traceback.clear_frames`` will clear
  the local variables of all the stack frames referenced by a traceback
  object.

Nick Coghlan's avatar
Nick Coghlan committed
5557 5558
Tests
-----
5559

Nick Coghlan's avatar
Nick Coghlan committed
5560 5561 5562
- Issue #18952: Fix regression in support data downloads introduced when
  test.support was converted to a package. Regression noticed by Zachary
  Ware.
5563

5564 5565
IDLE
----
5566

5567 5568
- Issue #18873: IDLE now detects Python source code encoding only in comment
  lines.
5569

5570
- Issue #18988: The "Tab" key now works when a word is already autocompleted.
5571

5572 5573 5574 5575 5576 5577
Documentation
-------------

- Issue #17003: Unified the size argument names in the io module with common
  practice.

5578 5579 5580 5581 5582 5583 5584
Build
-----

- Issue #18596: Support the use of address sanity checking in recent versions
  of clang and GCC by appropriately marking known false alarms in the small
  object allocator. Patch contributed by Dhiru Kholia.

5585 5586 5587 5588 5589 5590
Tools/Demos
-----------

- Issue #18873: 2to3 and the findnocoding.py script now detect Python source
  code encoding only in comment lines.

5591

5592 5593 5594
What's New in Python 3.4.0 Alpha 2?
===================================

5595
Release date: 2013-09-09
5596 5597 5598 5599

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

5600 5601
- Issue #18942: sys._debugmallocstats() output was damaged on Windows.

5602 5603 5604 5605 5606
- Issue #18571: Implementation of the PEP 446: file descriptors and file
  handles are now created non-inheritable; add functions
  os.get/set_inheritable(), os.get/set_handle_inheritable() and
  socket.socket.get/set_inheritable().

5607 5608 5609
- Issue #11619: The parser and the import machinery do not encode Unicode
  filenames anymore on Windows.

5610 5611 5612
- Issue #18808: Non-daemon threads are now automatically joined when
  a sub-interpreter is shutdown (it would previously dump a fatal error).

R David Murray's avatar
R David Murray committed
5613
- Remove support for compiling on systems without getcwd().
5614

5615 5616
- Issue #18774: Remove last bits of GNU PTH thread code and thread_pth.h.

5617 5618 5619 5620
- Issue #18771: Add optimization to set object lookups to reduce the cost
  of hash collisions.  The core idea is to inspect a second key/hash pair
  for each cache line retrieved.

5621 5622 5623 5624
- Issue #16105: When a signal handler fails to write to the file descriptor
  registered with ``signal.set_wakeup_fd()``, report an exception instead
  of ignoring the error.

5625 5626
- Issue #18722: Remove uses of the "register" keyword in C code.

5627 5628
- Issue #18667: Add missing "HAVE_FCHOWNAT" symbol to posix._have_functions.

5629
- Issue #16499: Add command line option for isolated mode.
5630

5631 5632 5633
- Issue #15301: Parsing fd, uid, and gid parameters for builtins
  in Modules/posixmodule.c is now far more robust.

5634
- Issue #18368: PyOS_StdioReadline() no longer leaks memory when realloc()
5635
  fail.
5636

5637 5638 5639
- Issue #17934: Add a clear() method to frame objects, to help clean up
  expensive details (local variables) and break reference cycles.

5640 5641 5642
- Issue #18780: %-formatting codes %d, %i, and %u now treat int-subclasses
  as int (displays value of int-subclass instead of str(int-subclass) ).

5643 5644 5645
Library
-------

5646 5647 5648 5649
- Issue #18808: Thread.join() now waits for the underlying thread state to
  be destroyed before returning.  This prevents unpredictable aborts in
  Py_EndInterpreter() when some non-daemon threads are still running.

5650 5651 5652
- Issue #18458: Prevent crashes with newer versions of libedit.  Its readline
  emulation has changed from 0-based indexing to 1-based like gnu readline.

5653 5654 5655
- Issue #18852: Handle case of ``readline.__doc__`` being ``None`` in the new
  readline activation code in ``site.py``.

5656
- Issue #18672: Fixed format specifiers for Py_ssize_t in debugging output in
5657
  the _sre module.
5658

R David Murray's avatar
R David Murray committed
5659
- Issue #18830: inspect.getclasstree() no longer produces duplicate entries even
5660 5661
  when input list contains duplicates.

5662
- Issue #18878: sunau.open now supports the context management protocol.  Based on
5663 5664
  patches by Claudiu Popa and R. David Murray.

5665 5666 5667
- Issue #18909: Fix _tkinter.tkapp.interpaddr() on Windows 64-bit, don't cast
  64-bit pointer to long (32 bits).

5668 5669
- Issue #18876: The FileIO.mode attribute now better reflects the actual mode
  under which the file was opened.  Patch by Erik Bray.
5670

5671 5672
- Issue #16853: Add new selectors module.

5673 5674
- Issue #18882: Add threading.main_thread() function.

5675 5676 5677
- Issue #18901: The sunau getparams method now returns a namedtuple rather than
  a plain tuple.  Patch by Claudiu Popa.

5678 5679 5680
- Issue #17487: The result of the wave getparams method now is pickleable again.
  Patch by Claudiu Popa.

5681 5682 5683 5684
- Issue #18756: os.urandom() now uses a lazily-opened persistent file
  descriptor, so as to avoid using many file descriptors when run in
  parallel from multiple threads.

5685 5686 5687
- Issue #18418: After fork(), reinit all threads states, not only active ones.
  Patch by A. Jesse Jiryu Davis.

5688 5689
- Issue #17974: Switch unittest from using getopt to using argparse.

5690 5691
- Issue #11798: TestSuite now drops references to own tests after execution.

5692 5693 5694
- Issue #16611: http.cookie now correctly parses the 'secure' and 'httponly'
  cookie flags.

5695 5696 5697
- Issue #11973: Fix a problem in kevent. The flags and fflags fields are now
  properly handled as unsigned.

5698 5699 5700
- Issue #18807: ``pyvenv`` now takes a --copies argument allowing copies
  instead of symlinks even where symlinks are available and the default.

5701 5702 5703
- Issue #18538: ``python -m dis`` now uses argparse for argument processing.
  Patch by Michele Orrù.

5704 5705
- Issue #18394: Close cgi.FieldStorage's optional file.

R David Murray's avatar
R David Murray committed
5706
- Issue #17702: On error, os.environb now suppresses the exception context
5707 5708
  when raising a new KeyError with the original key.

5709 5710
- Issue #16809: Fixed some tkinter incompabilities with Tcl/Tk 8.6.

5711 5712 5713
- Issue #16809: Tkinter's splitlist() and split() methods now accept Tcl_Obj
  argument.

5714 5715 5716
- Issue #18324: set_payload now correctly handles binary input.  This also
  supersedes the previous fixes for #14360, #1717, and #16564.

5717 5718 5719
- Issue #18794: Add a fileno() method and a closed attribute to select.devpoll
  objects.

5720 5721 5722
- Issue #17119: Fixed integer overflows when processing large strings and tuples
  in the tkinter module.

5723
- Issue #18747: Re-seed OpenSSL's pseudo-random number generator after fork.
5724
  A pthread_atfork() parent handler is used to seed the PRNG with pid, time
5725 5726
  and some stack data.

5727 5728 5729
- Issue #8865: Concurrent invocation of select.poll.poll() now raises a
  RuntimeError exception.  Patch by Christian Schubert.

5730 5731 5732
- Issue #18777: The ssl module now uses the new CRYPTO_THREADID API of
  OpenSSL 1.0.0+ instead of the deprecated CRYPTO id callback function.

Christian Heimes's avatar
Christian Heimes committed
5733
- Issue #18768: Correct doc string of RAND_edg(). Patch by Vajrasky Kok.
5734

5735 5736 5737
- Issue #18178: Fix ctypes on BSD. dlmalloc.c was compiled twice which broke
  malloc weak symbols.

5738 5739 5740 5741 5742 5743
- Issue #18709: Fix CVE-2013-4238. The SSL module now handles NULL bytes
  inside subjectAltName correctly. Formerly the module has used OpenSSL's
  GENERAL_NAME_print() function to get the string represention of ASN.1
  strings for ``rfc822Name`` (email), ``dNSName`` (DNS) and
  ``uniformResourceIdentifier`` (URI).

5744 5745
- Issue #18701: Remove support of old CPython versions (<3.0) from C code.

5746 5747 5748 5749
- Issue #18756: Improve error reporting in os.urandom() when the failure
  is due to something else than /dev/urandom not existing (for example,
  exhausting the file descriptor limit).

5750 5751 5752
- Issue #18673: Add O_TMPFILE to os module. O_TMPFILE requires Linux kernel
  3.11 or newer. It's only defined on system with 3.11 uapi headers, too.

5753 5754 5755
- Issue #18532: Change the builtin hash algorithms' names to lower case names
  as promised by hashlib's documentation.

5756 5757 5758 5759
- Issue #8713: add new spwan and forkserver start methods, and new functions
  get_all_start_methods, get_start_method, and set_start_method, to
  multiprocessing.

5760 5761
- Issue #18405: Improve the entropy of crypt.mksalt().

5762 5763 5764 5765 5766
- Issue #12015: The tempfile module now uses a suffix of 8 random characters
  instead of 6, to reduce the risk of filename collision. The entropy was
  reduced when uppercase letters were removed from the charset used to generate
  random characters.

5767 5768 5769
- Issue #18585: Add :func:`textwrap.shorten` to collapse and truncate a
  piece of text to a given length.

5770 5771 5772
- Issue #18598: Tweak exception message for importlib.import_module() to
  include the module name when a key argument is missing.

Eric Snow's avatar
Eric Snow committed
5773
- Issue #19151: Fix docstring and use of _get_supported_file_loaders() to
5774 5775
  reflect 2-tuples.

5776 5777
- Issue #19152: Add ExtensionFileLoader.get_filename().

5778 5779 5780
- Issue #18676: Change 'positive' to 'non-negative' in queue.py put and get
  docstrings and ValueError messages. Patch by Zhongyue Luo

5781 5782
- Fix refcounting issue with extension types in tkinter.

5783 5784 5785
- Issue #8112: xlmrpc.server's DocXMLRPCServer server no longer raises an error
  if methods have annotations; it now correctly displays the annotations.

5786 5787 5788
- Issue #18600: Added policy argument to email.message.Message.as_string,
  and as_bytes and __bytes__ methods to Message.

5789 5790
- Issue #18671: Output more information when logging exceptions occur.

5791 5792 5793
- Issue #18621: Prevent the site module's patched builtins from keeping
  too many references alive for too long.

5794 5795 5796 5797
- Issue #4885: Add weakref support to mmap objects.  Patch by Valerie Lambert.

- Issue #8860: Fixed rounding in timedelta constructor.

5798 5799 5800
- Issue #18849: Fixed a Windows-specific tempfile bug where collision with an
  existing directory caused mkstemp and related APIs to fail instead of
  retrying. Report and fix by Vlad Shcherbina.
5801

5802 5803 5804
- Issue #18920: argparse's default destination for the version action (-v,
  --version) has also been changed to stdout, to match the Python executable.

5805 5806 5807
Tests
-----

5808 5809 5810
- Issue #18623: Factor out the _SuppressCoreFiles context manager into
  test.support.  Patch by Valerie Lambert.

5811 5812
- Issue #12037: Fix test_email for desktop Windows.

5813 5814 5815 5816 5817
- Issue #15507: test_subprocess's test_send_signal could fail if the test
  runner were run in an environment where the process inherited an ignore
  setting for SIGINT.  Restore the SIGINT handler to the desired
  KeyboardInterrupt raising one during that test.

5818 5819 5820
- Issue #16799: Switched from getopt to argparse style in regrtest's argument
  parsing.  Added more tests for regrtest's argument parsing.

5821 5822 5823 5824
- Issue #18792: Use "127.0.0.1" or "::1" instead of "localhost" as much as
  possible, since "localhost" goes through a DNS lookup under recent Windows
  versions.

5825 5826 5827 5828 5829
IDLE
----

- Issue #18489: Add tests for SearchEngine. Original patch by Phil Webster.

5830 5831 5832
Documentation
-------------

5833 5834
- Issue #18743: Fix references to non-existant "StringIO" module.

5835 5836 5837
- Issue #18783: Removed existing mentions of Python long type in docstrings,
  error messages and comments.

5838 5839 5840 5841 5842 5843
Build
-----

- Issue #1584: Provide configure options to override default search paths for
  Tcl and Tk when building _tkinter.

5844 5845 5846 5847 5848
- Issue #15663: Tcl/Tk 8.5.14 is now included with the OS X 10.6+ 64-/32-bit
  installer.  It is no longer necessary to install a third-party version of
  Tcl/Tk 8.5 to work around the problems in the Apple-supplied Tcl/Tk 8.5
  shipped in OS X 10.6 and later releases.

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

- Issue #18922: Now The Lib/smtpd.py and Tools/i18n/msgfmt.py scripts write
  their version strings to stdout, and not to sderr.

5855

5856 5857
What's New in Python 3.4.0 Alpha 1?
===================================
5858

Larry Hastings's avatar
Larry Hastings committed
5859
Release date: 2013-08-03
5860 5861 5862 5863

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

5864 5865
- Issue #16741: Fix an error reporting in int().

5866 5867
- Issue #17899: Fix rare file descriptor leak in os.listdir().

5868 5869 5870
- Issue #10241: Clear extension module dict copies at interpreter shutdown.
  Patch by Neil Schemenauer, minimally modified.

5871 5872 5873
- Issue #9035: ismount now recognises volumes mounted below a drive root
  on Windows. Original patch by Atsuo Ishimoto.

5874 5875 5876
- Issue #18214: Improve finalization of Python modules to avoid setting
  their globals to None, in most cases.

5877 5878
- Issue #18112: PEP 442 implementation (safe object finalization).

5879 5880 5881
- Issue #18552: Check return value of PyArena_AddPyObject() in
  obj2ast_object().

5882 5883
- Issue #18560: Fix potential NULL pointer dereference in sum().

5884 5885 5886 5887
- Issue #18520: Add a new PyStructSequence_InitType2() function, same than
  PyStructSequence_InitType() except that it has a return value (0 on success,
  -1 on error).

5888 5889 5890
- Issue #15905: Fix theoretical buffer overflow in handling of sys.argv[0],
  prefix and exec_prefix if the operation system does not obey MAXPATHLEN.

5891 5892 5893
- Issue #18408: Fix many various bugs in code handling errors, especially
  on memory allocation failure (MemoryError).

5894 5895
- Issue #18344: Fix potential ref-leaks in _bufferedreader_read_all().

5896 5897 5898
- Issue #18342: Use the repr of a module name when an import fails when using
  ``from ... import ...``.

5899 5900 5901
- Issue #17872: Fix a segfault in marshal.load() when input stream returns
  more bytes than requested.

5902 5903 5904
- Issue #18338: `python --version` now prints version string to stdout, and
  not to stderr.  Patch by Berker Peksag and Michael Dickens.

5905 5906 5907
- Issue #18426: Fix NULL pointer dereference in C extension import when
  PyModule_GetDef() returns an error.

5908 5909 5910 5911
- Issue #17206: On Windows, increase the stack size from 2 MB to 4.2 MB to fix
  a stack overflow in the marshal module (fix a crash in test_marshal).
  Patch written by Jeremy Kloth.

5912 5913 5914
- Issue #3329: Implement the PEP 445: Add new APIs to customize Python memory
  allocators.

5915 5916 5917
- Issue #18328: Reorder ops in PyThreadState_Delete*() functions. Now the
  tstate is first removed from TLS and then deallocated.

5918 5919
- Issue #13483: Use VirtualAlloc in obmalloc on Windows.

5920 5921 5922
- Issue #18184: PyUnicode_FromFormat() and PyUnicode_FromFormatV() now raise
  OverflowError when an argument of %c format is out of range.

5923 5924 5925 5926
- Issue #18111: The min() and max() functions now support a default argument
  to be returned instead of raising a ValueError on an empty sequence.
  (Contributed by Julian Berman.)

5927 5928 5929
- Issue #18137: Detect integer overflow on precision in float.__format__()
  and complex.__format__().

5930 5931 5932
- Issue #18183: Fix various unicode operations on strings with large unicode
  codepoints.

5933 5934
- Issue #18180: Fix ref leak in _PyImport_GetDynLoadWindows().

5935 5936 5937
- Issue #18038: SyntaxError raised during compilation sources with illegal
  encoding now always contains an encoding name.

5938 5939
- Issue #17931: Resolve confusion on Windows between pids and process
  handles.
5940

5941 5942 5943
- Tweak the exception message when the magic number or size value in a bytecode
  file is truncated.

5944 5945 5946
- Issue #17932: Fix an integer overflow issue on Windows 64-bit in iterators:
  change the C type of seqiterobject.it_index from long to Py_ssize_t.

5947 5948 5949 5950 5951 5952
- Issue #18065: Don't set __path__ to the package name for frozen packages.

- Issue #18088: When reloading a module, unconditionally reset all relevant
  attributes on the module (e.g. __name__, __loader__, __package__, __file__,
  __cached__).

5953 5954
- Issue #17937: Try harder to collect cyclic garbage at shutdown.

5955 5956 5957
- Issue #12370: Prevent class bodies from interfering with the __class__
  closure.

5958 5959 5960
- Issue #17644: Fix a crash in str.format when curly braces are used in square
  brackets.

5961 5962
- Issue #17237: Fix crash in the ASCII decoder on m68k.

5963 5964 5965
- Issue #17927: Frame objects kept arguments alive if they had been
  copied into a cell, even if the cell was cleared.

5966 5967 5968
- Issue #1545463: At shutdown, defer finalization of codec modules so
  that stderr remains usable.

5969 5970 5971
- Issue #7330: Implement width and precision (ex: "%5.3s") for the format
  string of PyUnicode_FromFormat() function, original patch written by Ysj Ray.

5972 5973 5974
- Issue #1545463: Global variables caught in reference cycles are now
  garbage-collected at shutdown.

5975 5976 5977 5978 5979
- Issue #17094: Clear stale thread states after fork().  Note that this
  is a potentially disruptive change since it may release some system
  resources which would otherwise remain perpetually alive (e.g. database
  connections kept in thread-local storage).

5980 5981 5982
- Issue #17408: Avoid using an obsolete instance of the copyreg module when
  the interpreter is shutdown and then started again.

5983 5984 5985
- Issue #5845: Enable tab-completion in the interactive interpreter by
  default, thanks to a new sys.__interactivehook__.

5986 5987 5988
- Issue #17115,17116: Module initialization now includes setting __package__ and
  __loader__ attributes to None.

5989 5990 5991
- Issue #17853: Ensure locals of a class that shadow free variables always win
  over the closures.

5992 5993 5994
- Issue #17863: In the interactive console, don't loop forever if the encoding
  can't be fetched from stdin.

5995 5996
- Issue #17867: Raise an ImportError if __import__ is not found in __builtins__.

5997 5998
- Issue #18698: Ensure importlib.reload() returns the module out of sys.modules.

5999 6000 6001
- Issue #17857: Prevent build failures with pre-3.5.0 versions of sqlite3,
  such as was shipped with Centos 5 and Mac OS X 10.4.

6002 6003 6004 6005
- Issue #17413: sys.settrace callbacks were being passed a string instead of an
  exception instance for the 'value' element of the arg tuple if the exception
  originated from C code; now an exception instance is always provided.

6006 6007 6008
- Issue #17782: Fix undefined behaviour on platforms where
  ``struct timespec``'s "tv_nsec" member is not a C long.

6009 6010
- Issue #17722: When looking up __round__, resolve descriptors.

6011 6012
- Issue #16061: Speed up str.replace() for replacing 1-character strings.

6013 6014 6015
- Issue #17715: Fix segmentation fault from raising an exception in a __trunc__
  method.

6016 6017
- Issue #17643: Add __callback__ attribute to weakref.ref.

6018 6019 6020
- Issue #16447: Fixed potential segmentation fault when setting __name__ on a
  class.

6021 6022
- Issue #17669: Fix crash involving finalization of generators using yield from.

6023 6024
- Issue #14439: Python now prints the traceback on runpy failure at startup.

6025 6026 6027
- Issue #17469: Fix _Py_GetAllocatedBlocks() and sys.getallocatedblocks()
  when running on valgrind.

6028 6029
- Issue #17619: Make input() check for Ctrl-C correctly on Windows.

Brett Cannon's avatar
merge  
Brett Cannon committed
6030 6031
- Issue #17357: Add missing verbosity messages for -v/-vv that were lost during
  the importlib transition.
6032

6033 6034
- Issue #17610: Don't rely on non-standard behavior of the C qsort() function.

6035 6036 6037
- Issue #17323: The "[X refs, Y blocks]" printed by debug builds has been
  disabled by default.  It can be re-enabled with the `-X showrefcount` option.

6038 6039 6040 6041 6042 6043 6044 6045 6046 6047 6048 6049 6050
- Issue #17328: Fix possible refleak in dict.setdefault.

- Issue #17275: Corrected class name in init error messages of the C version of
  BufferedWriter and BufferedRandom.

- Issue #7963: Fixed misleading error message that issued when object is
  called without arguments.

- Issue #8745: Small speed up zipimport on Windows. Patch by Catalin Iacob.

- Issue #5308: Raise ValueError when marshalling too large object (a sequence
  with size >= 2**31), instead of producing illegal marshal data.

6051
- Issue #12983: Bytes literals with invalid ``\x`` escape now raise a SyntaxError
6052 6053 6054 6055 6056 6057 6058 6059 6060 6061 6062 6063 6064 6065 6066 6067 6068 6069 6070 6071 6072 6073 6074 6075 6076 6077 6078 6079 6080 6081 6082 6083 6084 6085
  and a full traceback including line number.

- Issue #16967: In function definition, evaluate positional defaults before
  keyword-only defaults.

- Issue #17173: Remove uses of locale-dependent C functions (isalpha() etc.)
  in the interpreter.

- Issue #17137: When an Unicode string is resized, the internal wide character
  string (wstr) format is now cleared.

- Issue #17043: The unicode-internal decoder no longer read past the end of
  input buffer.

- Issue #17098: All modules now have __loader__ set even if they pre-exist the
  bootstrapping of importlib.

- Issue #16979: Fix error handling bugs in the unicode-escape-decode decoder.

- Issue #16772: The base argument to the int constructor no longer accepts
  floats, or other non-integer objects with an __int__ method.  Objects
  with an __index__ method are now accepted.

- Issue #10156: In the interpreter's initialization phase, unicode globals
  are now initialized dynamically as needed.

- Issue #16980: Fix processing of escaped non-ascii bytes in the
  unicode-escape-decode decoder.

- Issue #16975: Fix error handling bug in the escape-decode bytes decoder.

- Issue #14850: Now a charmap decoder treats U+FFFE as "undefined mapping"
  in any mapping, not only in a string.

6086 6087 6088
- Issue #16613: Add *m* argument to ``collections.Chainmap.new_child`` to
  allow the new child map to be specified explicitly.

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- Issue #16730: importlib.machinery.FileFinder now no longers raises an
  exception when trying to populate its cache and it finds out the directory is
  unreadable or has turned into a file. Reported and diagnosed by
  David Pritchard.

- Issue #16906: Fix a logic error that prevented most static strings from being
  cleared.

- Issue #11461: Fix the incremental UTF-16 decoder. Original patch by
  Amaury Forgeot d'Arc.

- Issue #16856: Fix a segmentation fault from calling repr() on a dict with
  a key whose repr raise an exception.

- Issue #16367: Fix FileIO.readall() on Windows for files larger than 2 GB.

- Issue #16761: Calling int() with base argument only now raises TypeError.

- Issue #16759: Support the full DWORD (unsigned long) range in Reg2Py
  when retrieving a REG_DWORD value. This corrects functions like
  winreg.QueryValueEx that may have been returning truncated values.

- Issue #14420: Support the full DWORD (unsigned long) range in Py2Reg
  when passed a REG_DWORD value. Fixes OverflowError in winreg.SetValueEx.

- Issue #11939: Set the st_dev attribute of stat_result to allow Windows to
  take advantage of the os.path.samefile/sameopenfile/samestat implementations
  used by other platforms.

- Issue #16772: The int() constructor's second argument (base) no longer
  accepts non integer values.  Consistent with the behavior in Python 2.

- Issue #14470: Remove w9xpopen support per PEP 11.

- Issue #9856: Replace deprecation warning with raising TypeError
  in object.__format__. Patch by Florent Xicluna.

- Issue #16597: In buffered and text IO, call close() on the underlying stream
  if invoking flush() fails.

- Issue #16722: In the bytes() constructor, try to call __bytes__ on the
  argument before __index__.

- Issue #16421: loading multiple modules from one shared object is now
  handled correctly (previously, the first module loaded from that file
  was silently returned). Patch by Václav Šmilauer.

- Issue #16602: When a weakref's target was part of a long deallocation
  chain, the object could remain reachable through its weakref even though
  its refcount had dropped to zero.

- Issue #16495: Remove extraneous NULL encoding check from bytes_decode().

- Issue #16619: Create NameConstant AST class to represent None, True, and False
  literals. As a result, these constants are never loaded at runtime from
  builtins.

- Issue #16455: On FreeBSD and Solaris, if the locale is C, the
6147
  ASCII/surrogateescape codec is now used (instead of the locale encoding) to
6148
  decode the command line arguments. This change fixes inconsistencies with
6149 6150
  os.fsencode() and os.fsdecode(), because these operating systems announce an
  ASCII locale encoding, but actually use the ISO-8859-1 encoding in practice.
6151 6152 6153 6154 6155 6156 6157 6158 6159 6160 6161 6162 6163 6164 6165 6166 6167 6168 6169 6170 6171 6172 6173 6174 6175 6176 6177 6178 6179 6180 6181 6182 6183 6184 6185 6186 6187 6188 6189 6190 6191 6192 6193 6194 6195 6196 6197 6198 6199 6200 6201 6202 6203 6204 6205 6206 6207 6208 6209 6210 6211 6212 6213 6214 6215 6216 6217 6218 6219 6220 6221 6222 6223 6224 6225 6226 6227 6228 6229 6230 6231 6232 6233 6234 6235 6236 6237 6238 6239 6240

- Issue #16562: Optimize dict equality testing.  Patch by Serhiy Storchaka.

- Issue #16588: Silence unused-but-set warnings in Python/thread_pthread

- Issue #16592: stringlib_bytes_join doesn't raise MemoryError on allocation
  failure.

- Issue #16546: Fix: ast.YieldFrom argument is now mandatory.

- Issue #16514: Fix regression causing a traceback when sys.path[0] is None
  (actually, any non-string or non-bytes type).

- Issue #16306: Fix multiple error messages when unknown command line
  parameters where passed to the interpreter.  Patch by Hieu Nguyen.

- Issue #16215: Fix potential double memory free in str.replace().  Patch
  by Serhiy Storchaka.

- Issue #16290: A float return value from the __complex__ special method is no
  longer accepted in the complex() constructor.

- Issue #16416: On Mac OS X, operating system data are now always
  encoded/decoded to/from UTF-8/surrogateescape, instead of the locale encoding
  (which may be ASCII if no locale environment variable is set), to avoid
  inconsistencies with os.fsencode() and os.fsdecode() functions which are
  already using UTF-8/surrogateescape.

- Issue #16453: Fix equality testing of dead weakref objects.

- Issue #9535: Fix pending signals that have been received but not yet
  handled by Python to not persist after os.fork() in the child process.

- Issue #14794: Fix slice.indices to return correct results for huge values,
  rather than raising OverflowError.

- Issue #15001: fix segfault on "del sys.modules['__main__']". Patch by Victor
  Stinner.

- Issue #8271: the utf-8 decoder now outputs the correct number of U+FFFD
  characters when used with the 'replace' error handler on invalid utf-8
  sequences.  Patch by Serhiy Storchaka, tests by Ezio Melotti.

- Issue #5765: Apply a hard recursion limit in the compiler instead of
  blowing the stack and segfaulting. Initial patch by Andrea Griffini.

- Issue #16402: When slicing a range, fix shadowing of exceptions from
  __index__.

- Issue #16336: fix input checking in the surrogatepass error handler.
  Patch by Serhiy Storchaka.

- Issue #8401: assigning an int to a bytearray slice (e.g. b[3:4] = 5) now
  raises an error.

- Issue #7317: Display full tracebacks when an error occurs asynchronously.
  Patch by Alon Horev with update by Alexey Kachayev.

- Issue #16309: Make PYTHONPATH="" behavior the same as if PYTHONPATH
  not set at all.

- Issue #10189: Improve the error reporting of SyntaxErrors related to global
  and nonlocal statements.

- Fix segfaults on setting __qualname__ on builtin types and attempting to
  delete it on any type.

- Issue #14625: Rewrite the UTF-32 decoder. It is now 3x to 4x faster. Patch
  written by Serhiy Storchaka.

- Issue #16345: Fix an infinite loop when ``fromkeys`` on a dict subclass
  received a nonempty dict from the constructor.

- Issue #16271: Fix strange bugs that resulted from __qualname__ appearing in a
  class's __dict__ and on type.

- Issue #12805: Make bytes.join and bytearray.join faster when the separator
  is empty.  Patch by Serhiy Storchaka.

- Issue #6074: Ensure cached bytecode files can always be updated by the
  user that created them, even when the source file is read-only.

- Issue #15958: bytes.join and bytearray.join now accept arbitrary buffer
  objects.

- Issue #14783: Improve int() docstring and switch docstrings for str(),
  range(), and slice() to use multi-line signatures.

- Issue #16160: Subclass support now works for types.SimpleNamespace.

6241 6242 6243
- Issue #16148: Implement PEP 424, adding operator.length_hint and
  PyObject_LengthHint.

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- Upgrade Unicode data (UCD) to version 6.2.

- Issue #15379: Fix passing of non-BMP characters as integers for the charmap
  decoder (already working as unicode strings).  Patch by Serhiy Storchaka.

- Issue #15144: Fix possible integer overflow when handling pointers as integer
  values, by using `Py_uintptr_t` instead of `size_t`.  Patch by Serhiy
  Storchaka.

- Issue #15965: Explicitly cast `AT_FDCWD` as (int).  Required on Solaris 10
  (which defines `AT_FDCWD` as ``0xffd19553``), harmless on other platforms.

- Issue #15839: Convert SystemErrors in `super()` to RuntimeErrors.

- Issue #15448: Buffered IO now frees the buffer when closed, instead
  of when deallocating.

- Issue #15846: Fix SystemError which happened when using `ast.parse()` in an
  exception handler on code with syntax errors.

- Issue #15897: zipimport.c doesn't check return value of fseek().
  Patch by Felipe Cruz.

- Issue #15801: Make sure mappings passed to '%' formatting are actually
  subscriptable.

- Issue #15111: __import__ should propagate ImportError when raised as a
  side-effect of a module triggered from using fromlist.

- Issue #15022: Add pickle and comparison support to types.SimpleNamespace.

6275 6276
Library
-------
Terry Jan Reedy's avatar
Terry Jan Reedy committed
6277

6278 6279
- Issue #4331: Added functools.partialmethod (Initial patch by Alon Horev)

6280 6281 6282
- Issue #13461: Fix a crash in the TextIOWrapper.tell method on 64-bit
  platforms.  Patch by Yogesh Chaudhari.

Ezio Melotti's avatar
Ezio Melotti committed
6283
- Issue #18681: Fix a NameError in importlib.reload() (noticed by Weizhao Li).
6284

6285 6286 6287
- Issue #14323: Expanded the number of digits in the coefficients for the
  RGB -- YIQ conversions so that they match the FCC NTSC versions.

6288 6289
- Issue #17998: Fix an internal error in regular expression engine.

6290 6291 6292
- Issue #17557: Fix os.getgroups() to work with the modified behavior of
  getgroups(2) on OS X 10.8.  Original patch by Mateusz Lenik.

6293 6294 6295
- Issue #18608: Avoid keeping a strong reference to the locale module
  inside the _io module.

6296 6297 6298
- Issue #18619: Fix atexit leaking callbacks registered from sub-interpreters,
  and make it GC-aware.

6299 6300 6301 6302
- Issue #15699: The readline module now uses PEP 3121-style module
  initialization, so as to reclaim allocated resources (Python callbacks)
  at shutdown.  Original patch by Robin Schreiber.

6303
- Issue #17616: wave.open now supports the context management protocol.
6304

6305 6306 6307
- Issue #18599: Fix name attribute of _sha1.sha1() object. It now returns
  'SHA1' instead of 'SHA'.

6308 6309 6310
- Issue #13266: Added inspect.unwrap to easily unravel __wrapped__ chains
  (initial patch by Daniel Urban and Aaron Iles)

6311 6312
- Issue #18561: Skip name in ctypes' _build_callargs() if name is NULL.

6313 6314
- Issue #18559: Fix NULL pointer dereference error in _pickle module

Brett Cannon's avatar
Brett Cannon committed
6315 6316 6317
- Issue #18556: Check the return type of PyUnicode_AsWideChar() in ctype's
  U_set().

6318 6319
- Issue #17818: aifc.getparams now returns a namedtuple.

6320 6321
- Issue #18549: Eliminate dead code in socket_ntohl()

6322 6323 6324
- Issue #18530: Remove additional stat call from posixpath.ismount.
  Patch by Alex Gaynor.

6325 6326
- Issue #18514: Fix unreachable Py_DECREF() call in PyCData_FromBaseObj()

6327 6328 6329
- Issue #9177: Calling read() or write() now raises ValueError, not
  AttributeError, on a closed SSL socket.  Patch by Senko Rasic.

6330 6331 6332
- Issue #18513: Fix behaviour of cmath.rect w.r.t. signed zeros on OS X 10.8 +
  gcc.

6333 6334 6335
- Issue #18479: Changed venv Activate.ps1 to make deactivate a function, and
  removed Deactivate.ps1.

6336 6337
- Issue #18480: Add missing call to PyType_Ready to the _elementtree extension.

6338 6339 6340
- Issue #17778: Fix test discovery for test_multiprocessing. (Patch by
  Zachary Ware.)

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- Issue #18393: The private module _gestalt and private functions
  platform._mac_ver_gestalt, platform._mac_ver_lookup and
  platform._bcd2str have been removed. This does not affect the public
  interface of the platform module.
6345

6346 6347 6348 6349
- Issue #17482: functools.update_wrapper (and functools.wraps) now set the
  __wrapped__ attribute correctly even if the underlying function has a
  __wrapped__ attribute set.

6350 6351 6352
- Issue #18431: The new email header parser now decodes RFC2047 encoded words
  in structured headers.

6353 6354 6355
- Issue #18432: The sched module's queue method was incorrectly returning
  an iterator instead of a list.

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- Issue #18044: The new email header parser was mis-parsing encoded words where
  an encoded character immediately followed the '?' that follows the CTE
  character, resulting in a decoding failure.  They are now decoded correctly.

6360 6361 6362
- Issue #18101: Tcl.split() now process strings nested in a tuple as it
  do with byte strings.

6363
- Issue #18116: getpass was always getting an error when testing /dev/tty,
6364 6365 6366
  and thus was always falling back to stdin, and would then raise an exception
  if stdin could not be used (such as /dev/null).  It also leaked an open file.
  All of these issues are now fixed.
6367

6368 6369 6370
- Issue #17198: Fix a NameError in the dbm module.  Patch by Valentina
  Mukhamedzhanova.

6371 6372
- Issue #18013: Fix cgi.FieldStorage to parse the W3C sample form.

6373 6374 6375
- Issue #18020: improve html.escape speed by an order of magnitude.
  Patch by Matt Bryant.

6376 6377 6378
- Issue #18347: ElementTree's html serializer now preserves the case of
  closing tags.

6379 6380
- Issue #17261: Ensure multiprocessing's proxies use proper address.

6381 6382 6383 6384
- Issue #18343: faulthandler.register() now keeps the previous signal handler
  when the function is called twice, so faulthandler.unregister() restores
  correctly the original signal handler.

6385 6386
- Issue #17097: Make multiprocessing ignore EINTR.

6387 6388 6389
- Issue #18339: Negative ints keys in unpickler.memo dict no longer cause a
  segfault inside the _pickle C extension.

6390
- Issue #18240: The HMAC module is no longer restricted to bytes and accepts
6391 6392
  any bytes-like object, e.g. memoryview. Original patch by Jonas Borgström.

6393 6394
- Issue #18224: Removed pydoc script from created venv, as it causes problems
  on Windows and adds no value over and above python -m pydoc ...
6395

6396 6397 6398
- Issue #18155: The csv module now correctly handles csv files that use
  a delimter character that has a special meaning in regexes, instead of
  throwing an exception.
6399

6400 6401
- Issue #14360: encode_quopri can now be successfully used as an encoder
  when constructing a MIMEApplication object.
6402

6403 6404 6405
- Issue #11390: Add -o and -f command line options to the doctest CLI to
  specify doctest options (and convert it to using argparse).

6406 6407 6408 6409
- Issue #18135: ssl.SSLSocket.write() now raises an OverflowError if the input
  string in longer than 2 gigabytes, and ssl.SSLContext.load_cert_chain()
  raises a ValueError if the password is longer than 2 gigabytes. The ssl
  module does not support partial write.
6410

6411 6412
- Issue #11016: Add C implementation of the stat module as _stat.

Benjamin Peterson's avatar
Benjamin Peterson committed
6413
- Issue #18248: Fix libffi build on AIX.
6414

6415
- Issue #18259: Declare sethostname in socketmodule.c for AIX
6416

6417 6418 6419 6420
- Issue #18147: Add diagnostic functions to ssl.SSLContext(). get_ca_list()
  lists all loaded CA certificates and cert_store_stats() returns amount of
  loaded X.509 certs, X.509 CA certs and CRLs.

6421
- Issue #18167: cgi.FieldStorage no longer fails to handle multipart/form-data
6422
  when ``\r\n`` appears at end of 65535 bytes without other newlines.
6423

6424
- Issue #18076: Introduce importlib.util.decode_source().
6425

6426 6427
- Issue #18357: add tests for dictview set difference.
  Patch by Fraser Tweedale.
6428

6429 6430 6431
- importlib.abc.SourceLoader.get_source() no longer changes SyntaxError or
  UnicodeDecodeError into ImportError.

6432 6433 6434 6435
- Issue #18058, 18057: Make the namespace package loader meet the
  importlib.abc.InspectLoader ABC, allowing for namespace packages to work with
  runpy.

6436 6437
- Issue #17177: The imp module is pending deprecation.

6438 6439 6440
- subprocess: Prevent a possible double close of parent pipe fds when the
  subprocess exec runs into an error.  Prevent a regular multi-close of the
  /dev/null fd when any of stdin, stdout and stderr was set to DEVNULL.
6441

6442 6443 6444 6445
- Issue #18194: Introduce importlib.util.cache_from_source() and
  source_from_cache() while documenting the equivalent functions in imp as
  deprecated.

6446 6447 6448
- Issue #17907: Document imp.new_module() as deprecated in favour of
  types.ModuleType.

6449 6450 6451
- Issue #18192: Introduce importlib.util.MAGIC_NUMBER and document as deprecated
  imp.get_magic().

6452 6453 6454
- Issue #18149: Add filecmp.clear_cache() to manually clear the filecmp cache.
  Patch by Mark Levitt

6455 6456
- Issue #18193: Add importlib.reload().

6457 6458
- Issue #18157: Stop using imp.load_module() in pydoc.

6459
- Issue #16102: Make uuid._netbios_getnode() work again on Python 3.
6460

6461 6462
- Issue #17134: Add ssl.enum_cert_store() as interface to Windows' cert store.

6463 6464 6465
- Issue #18143: Implement ssl.get_default_verify_paths() in order to debug
  the default locations for cafile and capath.

6466 6467
- Issue #17314: Move multiprocessing.forking over to importlib.

6468 6469 6470
- Issue #11959: SMTPServer and SMTPChannel now take an optional map, use of
  which avoids affecting global state.

6471 6472 6473
- Issue #18109: os.uname() now decodes fields from the locale encoding, and
  socket.gethostname() now decodes the hostname from the locale encoding,
  instead of using the UTF-8 encoding in strict mode.
6474

6475 6476 6477 6478 6479 6480
- Issue #18089: Implement importlib.abc.InspectLoader.load_module.

- Issue #18088: Introduce importlib.abc.Loader.init_module_attrs for setting
  module attributes. Leads to the pending deprecation of
  importlib.util.module_for_loader.

Senthil Kumaran's avatar
Senthil Kumaran committed
6481 6482 6483
- Issue #17403: urllib.parse.robotparser normalizes the urls before adding to
  ruleline. This helps in handling certain types invalid urls in a conservative
  manner. Patch contributed by Mher Movsisyan.
6484

6485 6486 6487
- Issue #18070: Have importlib.util.module_for_loader() set attributes
  unconditionally in order to properly support reloading.

6488
- Added importlib.util.module_to_load to return a context manager to provide the
6489
  proper module object to load.
6490

6491 6492
- Issue #18025: Fixed a segfault in io.BufferedIOBase.readinto() when raw
  stream's read() returns more bytes than requested.
6493

6494 6495 6496
- Issue #18011: As was originally intended, base64.b32decode() now raises a
  binascii.Error if there are non-b32-alphabet characters present in the input
  string, instead of a TypeError.
6497

Brett Cannon's avatar
Brett Cannon committed
6498 6499 6500
- Issue #18072: Implement importlib.abc.InspectLoader.get_code() and
  importlib.abc.ExecutionLoader.get_code().

6501 6502 6503
- Issue #8240: Set the SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER flag on SSL
  sockets.

6504 6505 6506
- Issue #17269: Workaround for socket.getaddrinfo crash on MacOS X
  with port None or "0" and flags AI_NUMERICSERV.

6507 6508
- Issue #16986: ElementTree now correctly works with string input when the
  internal XML encoding is not UTF-8 or US-ASCII.
6509

6510 6511
- Issue #17996: socket module now exposes AF_LINK constant on BSD and OSX.

6512 6513 6514
- Issue #17900: Allowed pickling of recursive OrderedDicts.  Decreased pickled
  size and pickling time.

6515 6516 6517
- Issue #17914: Add os.cpu_count(). Patch by Yogesh Chaudhari, based on an
  initial patch by Trent Nelson.

6518 6519 6520
- Issue #17812: Fixed quadratic complexity of base64.b32encode().
  Optimize base64.b32encode() and base64.b32decode() (speed up to 3x).

6521 6522 6523
- Issue #17980: Fix possible abuse of ssl.match_hostname() for denial of
  service using certificates with many wildcards (CVE-2013-2099).

6524 6525
- Issue #15758: Fix FileIO.readall() so it no longer has O(n**2) complexity.

6526 6527
- Issue #14596: The struct.Struct() objects now use a more compact
  implementation.
6528

6529 6530
- Issue #17981: logging's SysLogHandler now closes the socket when it catches
  socket OSErrors.
6531

6532 6533 6534
- Issue #17964: Fix os.sysconf(): the return type of the C sysconf() function
  is long, not int.

6535 6536
- Fix typos in the multiprocessing module.

6537 6538
- Issue #17754: Make ctypes.util.find_library() independent of the locale.

6539 6540
- Issue #17968: Fix memory leak in os.listxattr().

6541
- Issue #17606: Fixed support of encoded byte strings in the XMLGenerator
6542
  characters() and ignorableWhitespace() methods.  Original patch by Sebastian
6543 6544
  Ortiz Vasquez.

6545 6546 6547
- Issue #17732: Ignore distutils.cfg options pertaining to install paths if a
  virtual environment is active.

Georg Brandl's avatar
Georg Brandl committed
6548 6549 6550
- Issue #17915: Fix interoperability of xml.sax with file objects returned by
  codecs.open().

6551 6552
- Issue #16601: Restarting iteration over tarfile really restarts rather
  than continuing from where it left off.  Patch by Michael Birtwell.
6553

6554 6555 6556 6557
- Issue #17289: The readline module now plays nicer with external modules
  or applications changing the rl_completer_word_break_characters global
  variable.  Initial patch by Bradley Froehle.

6558 6559 6560
- Issue #12181: select module: Fix struct kevent definition on OpenBSD 64-bit
  platforms. Patch by Federico Schwindt.

6561 6562 6563 6564
- Issue #11816: multiple improvements to the dis module: get_instructions
  generator, ability to redirect output to a file, Bytecode and Instruction
  abstractions. Patch by Nick Coghlan, Ryan Kelly and Thomas Kluyver.

6565
- Issue #13831: Embed stringification of remote traceback in local
6566 6567
  traceback raised when pool task raises an exception.

6568 6569 6570
- Issue #15528: Add weakref.finalize to support finalization using
  weakref callbacks.

6571 6572 6573
- Issue #14173: Avoid crashing when reading a signal handler during
  interpreter shutdown.

6574 6575
- Issue #15902: Fix imp.load_module() accepting None as a file when loading an
  extension module.
6576

6577 6578 6579 6580
- Issue #13721: SSLSocket.getpeercert() and SSLSocket.do_handshake() now
  raise an OSError with ENOTCONN, instead of an AttributeError, when the
  SSLSocket is not connected.

6581 6582
- Issue #14679: add an __all__ (that contains only HTMLParser) to html.parser.

6583 6584 6585
- Issue #17802: Fix an UnboundLocalError in html.parser.  Initial tests by
  Thomas Barlow.

6586 6587 6588
- Issue #17358: Modules loaded by imp.load_source() and load_compiled() (and by
  extention load_module()) now have a better chance of working when reloaded.

6589 6590 6591
- Issue #17804: New function ``struct.iter_unpack`` allows for streaming
  struct unpacking.

6592 6593 6594
- Issue #17830: When keyword.py is used to update a keyword file, it now
  preserves the line endings of the original file.

6595 6596 6597
- Issue #17272: Making the urllib.request's Request.full_url a descriptor.
  Fixes bugs with assignment to full_url. Patch by Demian Brecht.

6598 6599
- Issue #17353: Plistlib emitted empty data tags with deeply nested datastructures

6600 6601 6602
- Issue #11714: Use 'with' statements to assure a Semaphore releases a
  condition variable.  Original patch by Thomas Rachel.

6603 6604 6605 6606
- Issue #16624: `subprocess.check_output` now accepts an `input` argument,
  allowing the subprocess's stdin to be provided as a (byte) string.
  Patch by Zack Weinberg.

6607 6608 6609
- Issue #17795: Reverted backwards-incompatible change in SysLogHandler with
  Unix domain sockets.

6610 6611 6612
- Issue #16694: Add a pure Python implementation of the operator module.
  Patch by Zachary Ware.

6613 6614 6615
- Issue #11182: remove the unused and undocumented pydoc.Scanner class.
  Patch by Martin Morrison.

6616 6617
- Issue #17741: Add ElementTree.XMLPullParser, an event-driven parser for
  non-blocking applications.
6618

6619 6620 6621
- Issue #17555: Fix ForkAwareThreadLock so that size of after fork
  registry does not grow exponentially with generation of process.

6622 6623
- Issue #17707: fix regression in multiprocessing.Queue's get() method where
  it did not block for short timeouts.
6624

6625
- Issue #17720: Fix the Python implementation of pickle.Unpickler to correctly
6626 6627
  process the APPENDS opcode when it is used on non-list objects.

6628 6629
- Issue #17012: shutil.which() no longer falls back to the PATH environment
  variable if an empty path argument is specified.  Patch by Serhiy Storchaka.
6630

6631 6632
- Issue #17710: Fix pickle raising a SystemError on bogus input.

6633 6634 6635
- Issue #17341: Include the invalid name in the error messages from re about
  invalid group names.

6636 6637 6638 6639
- Issue #17702: os.environ now raises KeyError with the original environment
  variable name (str on UNIX), instead of using the encoded name (bytes on
  UNIX).

6640 6641 6642
- Issue #16163: Make the importlib based version of pkgutil.iter_importers
  work for submodules. Initial patch by Berker Peksag.

6643 6644 6645
- Issue #16804: Fix a bug in the 'site' module that caused running
  'python -S -m site' to incorrectly throw an exception.

6646 6647 6648
- Issue #15480: Remove the deprecated and unused TYPE_INT64 code from marshal.
  Initial patch by Daniel Riti.

6649
- Issue #2118: SMTPException is now a subclass of OSError.
6650

6651 6652 6653
- Issue #17016: Get rid of possible pointer wraparounds and integer overflows
  in the re module.  Patch by Nickolai Zeldovich.

6654
- Issue #16658: add missing return to HTTPConnection.send().
6655 6656
  Patch by Jeff Knupp.

6657 6658
- Issue #9556: the logging package now allows specifying a time-of-day for a
  TimedRotatingFileHandler to rotate.
6659

6660 6661 6662
- Issue #14971: unittest test discovery no longer gets confused when a function
  has a different __name__ than its name in the TestCase class dictionary.

6663 6664 6665
- Issue #17487: The wave getparams method now returns a namedtuple rather than
  a plain tuple.

6666 6667
- Issue #17675: socket repr() provides local and remote addresses (if any).
  Patch by Giampaolo Rodola'
6668

6669 6670 6671
- Issue #17093: Make the ABCs in importlib.abc provide default values or raise
  reasonable exceptions for their methods to make them more amenable to super()
  calls.
6672

6673
- Issue #17566: Make importlib.abc.Loader.module_repr() optional instead of an
6674
  abstractmethod; now it raises NotImplementedError so as to be ignored by default.
6675

6676 6677
- Issue #17678: Remove the use of deprecated method in http/cookiejar.py by
  changing the call to get_origin_req_host() to origin_req_host.
Benjamin Peterson's avatar
Benjamin Peterson committed
6678

6679
- Issue #17666: Fix reading gzip files with an extra field.
6680

6681 6682
- Issue #16475: Support object instancing, recursion and interned strings
  in marshal
6683

6684
- Issue #17502: Process DEFAULT values in mock side_effect that returns iterator.
6685

6686 6687 6688
- Issue #16795: On the ast.arguments object, unify vararg with varargannotation
  and kwarg and kwargannotation. Change the column offset of ast.Attribute to be
  at the attribute name.
6689

6690 6691
- Issue #17434: Properly raise a SyntaxError when a string occurs between future
  imports.
6692

6693 6694
- Issue #17117: Import and @importlib.util.set_loader now set __loader__ when
  it has a value of None or the attribute doesn't exist.
6695

6696 6697
- Issue #17032: The "global" in the "NameError: global name 'x' is not defined"
  error message has been removed.  Patch by Ram Rachum.
6698

6699 6700 6701 6702
- Issue #18080: When building a C extension module on OS X, if the compiler
  is overriden with the CC environment variable, use the new compiler as
  the default for linking if LDSHARED is not also overriden.  This restores
  Distutils behavior introduced in 3.2.3 and inadvertently dropped in 3.3.0.
6703

6704 6705
- Issue #18113: Fixed a refcount leak in the curses.panel module's
  set_userptr() method.  Reported by Atsuo Ishimoto.
6706

6707
- Implement PEP 443 "Single-dispatch generic functions".
6708

6709
- Implement PEP 435 "Adding an Enum type to the Python standard library".
6710

6711 6712
- Issue #15596: Faster pickling of unicode strings.

6713
- Issue #17572: Avoid chained exceptions when passing bad directives to
Ezio Melotti's avatar
Ezio Melotti committed
6714 6715
  time.strptime().  Initial patch by Claudiu Popa.

6716 6717 6718
- Issue #17435: threading.Timer's __init__ method no longer uses mutable
  default values for the args and kwargs parameters.

Ezio Melotti's avatar
Ezio Melotti committed
6719 6720 6721
- Issue #17526: fix an IndexError raised while passing code without filename to
  inspect.findsource().  Initial patch by Tyler Doyle.

6722
- Issue #17540: Added style parameter to logging formatter configuration by dict.
6723

6724 6725 6726
- Issue #16692: The ssl module now supports TLS 1.1 and TLS 1.2.  Initial
  patch by Michele Orrù.

6727 6728
- Issue #17025: multiprocessing: Reduce Queue and SimpleQueue contention.

6729 6730 6731
- Issue #17536: Add to webbrowser's browser list: www-browser, x-www-browser,
  iceweasel, iceape.

6732 6733 6734
- Issue #17150: pprint now uses line continuations to wrap long string
  literals.

6735 6736 6737 6738 6739
- Issue #17488: Change the subprocess.Popen bufsize parameter default value
  from unbuffered (0) to buffering (-1) to match the behavior existing code
  expects and match the behavior of the subprocess module in Python 2 to avoid
  introducing hard to track down bugs.

6740 6741 6742
- Issue #17521: Corrected non-enabling of logger following two calls to
  fileConfig().

6743 6744
- Issue #17508: Corrected logging MemoryHandler configuration in dictConfig()
  where the target handler wasn't configured first.
Vinay Sajip's avatar
Vinay Sajip committed
6745

6746
- Issue #17209: curses.window.get_wch() now correctly handles KeyboardInterrupt
6747 6748
  (CTRL+c).

6749 6750 6751 6752
- Issue #5713: smtplib now handles 421 (closing connection) error codes when
  sending mail by closing the socket and reporting the 421 error code via the
  exception appropriate to the command that received the error response.

6753 6754 6755
- Issue #16997: unittest.TestCase now provides a subTest() context manager
  to procedurally generate, in an easy way, small test instances.

6756
- Issue #17485: Also delete the Request Content-Length header if the data
6757
  attribute is deleted.  (Follow on to issue Issue #16464).
6758

6759 6760 6761
- Issue #15927: CVS now correctly parses escaped newlines and carriage
  when parsing with quoting turned off.

6762 6763 6764
- Issue #17467: add readline and readlines support to mock_open in
  unittest.mock.

6765 6766 6767
- Issue #13248: removed deprecated and undocumented difflib.isbjunk,
  isbpopular.

6768 6769 6770 6771
- Issue #17192: Update the ctypes module's libffi to v3.0.13.  This
  specifically addresses a stack misalignment issue on x86 and issues on
  some more recent platforms.

6772 6773
- Issue #8862: Fixed curses cleanup when getkey is interrputed by a signal.

Gregory P. Smith's avatar
Gregory P. Smith committed
6774
- Issue #17443: imaplib.IMAP4_stream was using the default unbuffered IO
6775 6776 6777
  in subprocess, but the imap code assumes buffered IO.  In Python2 this
  worked by accident.  IMAP4_stream now explicitly uses buffered IO.

6778 6779 6780
- Issue #17476: Fixed regression relative to Python2 in undocumented pydoc
  'allmethods'; it was missing unbound methods on the class.

6781 6782
- Issue #17474: Remove the deprecated methods of Request class.

6783 6784 6785
- Issue #16709: unittest discover order is no-longer filesystem specific. Patch
  by Jeff Ramnani.

6786 6787
- Use the HTTPS PyPI url for upload, overriding any plain HTTP URL in pypirc.

6788 6789 6790
- Issue #5024: sndhdr.whichhdr now returns the frame count for WAV files
  rather than -1.

6791 6792 6793 6794
- Issue #17460: Remove the strict argument of HTTPConnection and removing the
  DeprecationWarning being issued from 3.2 onwards.

- Issue #16880: Do not assume _imp.load_dynamic() is defined in the imp module.
6795

6796
- Issue #16389: Fixed a performance regression relative to Python 3.1 in the
6797 6798
  caching of compiled regular expressions.

6799 6800
- Added missing FeedParser and BytesFeedParser to email.parser.__all__.

6801 6802
- Issue #17431: Fix missing import of BytesFeedParser in email.parser.

6803 6804 6805
- Issue #12921: http.server's send_error takes an explain argument to send more
  information in response. Patch contributed by Karl.

6806 6807
- Issue #17414: Add timeit, repeat, and default_timer to timeit.__all__.

6808 6809 6810
- Issue #1285086: Get rid of the refcounting hack and speed up
  urllib.parse.unquote() and urllib.parse.unquote_to_bytes().

6811 6812 6813
- Issue #17099: Have importlib.find_loader() raise ValueError when __loader__
  is not set, harmonizing with what happens when the attribute is set to None.

6814 6815
- Expose the O_PATH constant in the os module if it is available.

6816 6817 6818 6819
- Issue #17368: Fix an off-by-one error in the Python JSON decoder that caused
  a failure while decoding empty object literals when object_pairs_hook was
  specified.

6820
- Issue #17385: Fix quadratic behavior in threading.Condition.  The FIFO
6821 6822
  queue now uses a deque instead of a list.

6823 6824
- Issue #15806: Add contextlib.ignore().  This creates a context manager to
  ignore specified exceptions, replacing the "except SomeException: pass" idiom.
6825

6826 6827 6828 6829 6830
- Issue #14645: The email generator classes now produce output using the
  specified linesep throughout.  Previously if the prolog, epilog, or
  body were stored with a different linesep, that linesep was used.  This
  fix corrects an RFC non-compliance issue with smtplib.send_message.

6831 6832 6833
- Issue #17278: Fix a crash in heapq.heappush() and heapq.heappop() when
  the list is being resized concurrently.

6834 6835 6836
- Issue #16962: Use getdents64 instead of the obsolete getdents syscall
  in the subprocess module on Linux.

6837 6838 6839
- Issue #16935: unittest now counts the module as skipped if it raises SkipTest,
  instead of counting it as an error.  Patch by Zachary Ware.

6840 6841
- Issue #17018: Make Process.join() retry if os.waitpid() fails with EINTR.

6842 6843 6844 6845
- Issue #17223: array module: Fix a crasher when converting an array containing
  invalid characters (outside range [U+0000; U+10ffff]) to Unicode:
  repr(array), str(array) and array.tounicode(). Patch written by Manuel Jacob.

6846 6847 6848
- Issue #17197: profile/cProfile modules refactored so that code of run() and
  runctx() utility functions is not duplicated in both modules.

6849 6850 6851
- Issue #14720: sqlite3: Convert datetime microseconds correctly.
  Patch by Lowe Thiderman.

6852 6853 6854
- Issue #15132: Allow a list for the defaultTest argument of
  unittest.TestProgram. Patch by Jyrki Pulliainen.

6855 6856 6857
- Issue #17225: JSON decoder now counts columns in the first line starting
  with 1, as in other lines.

6858 6859 6860
- Issue #6623: Added explicit DeprecationWarning for ftplib.netrc, which has
  been deprecated and undocumented for a long time.

6861 6862 6863
- Issue #13700: Fix byte/string handling in imaplib authentication when an
  authobject is specified.

6864 6865 6866
- Issue #13153: Tkinter functions now raise TclError instead of ValueError when
  a string argument contains non-BMP character.

6867 6868 6869
- Issue #9669: Protect re against infinite loops on zero-width matching in
  non-greedy repeat.  Patch by Matthew Barnett.

6870 6871 6872 6873
- Issue #13169: The maximal repetition number in a regular expression has been
  increased from 65534 to 2147483647 (on 32-bit platform) or 4294967294 (on
  64-bit).

6874 6875 6876
- Issue #17143: Fix a missing import in the trace module.  Initial patch by
  Berker Peksag.

6877 6878 6879
- Issue #15220: email.feedparser's line splitting algorithm is now simpler and
  faster.

6880 6881
- Issue #16743: Fix mmap overflow check on 32 bit Windows.

6882 6883 6884
- Issue #16996: webbrowser module now uses shutil.which() to find a
  web-browser on the executable search path.

6885 6886 6887
- Issue #16800: tempfile.gettempdir() no longer left temporary files when
  the disk is full.  Original patch by Amir Szekely.

6888 6889
- Issue #17192: Import libffi-3.0.12.

6890 6891 6892
- Issue #16564: Fixed regression relative to Python2 in the operation of
  email.encoders.encode_7or8bit when used with binary data.

6893
- Issue #17052: unittest discovery should use self.testLoader.
6894

6895 6896
- Issue #4591: Uid and gid values larger than 2**31 are supported now.

6897
- Issue #17141: random.vonmisesvariate() no longer hangs for large kappas.
6898

6899 6900 6901
- Issue #17149: Fix random.vonmisesvariate to always return results in
  [0, 2*math.pi].

6902 6903
- Issue #1470548: XMLGenerator now works with binary output streams.

6904 6905 6906
- Issue #6975: os.path.realpath() now correctly resolves multiple nested
  symlinks on POSIX platforms.

6907 6908 6909
- Issue #13773: sqlite3.connect() gets a new `uri` parameter to pass the
  filename as a URI, allowing to pass custom options.

6910 6911 6912
- Issue #16564: Fixed regression relative to Python2 in the operation of
  email.encoders.encode_noop when used with binary data.

6913 6914 6915 6916
- Issue #10355: The mode, name, encoding and newlines properties now work on
  SpooledTemporaryFile objects even when they have not yet rolled over.
  Obsolete method xreadline (which has never worked in Python 3) has been
  removed.
6917

6918 6919 6920 6921 6922 6923
- Issue #16686: Fixed a lot of bugs in audioop module.  Fixed crashes in
  avgpp(), maxpp() and ratecv().  Fixed an integer overflow in add(), bias(),
  and ratecv().  reverse(), lin2lin() and ratecv() no more lose precision for
  32-bit samples.  max() and rms() no more returns a negative result and
  various other functions now work correctly with 32-bit sample -0x80000000.

6924 6925
- Issue #17073: Fix some integer overflows in sqlite3 module.

6926 6927
- Issue #16723: httplib.HTTPResponse no longer marked closed when the connection
  is automatically closed.
6928

6929 6930 6931
- Issue #15359: Add CAN_BCM protocol support to the socket module. Patch by
  Brian Thorne.

6932 6933 6934
- Issue #16948: Fix quoted printable body encoding for non-latin1 character
  sets in the email package.

6935 6936 6937
- Issue #16811: Fix folding of headers with no value in the provisional email
  policies.

6938 6939
- Issue #17132: Update symbol for "yield from" grammar changes.

6940
- Issue #17076: Make copying of xattrs more tolerant of missing FS support.
6941 6942
  Patch by Thomas Wouters.

6943 6944 6945
- Issue #17089: Expat parser now correctly works with string input when the
  internal XML encoding is not UTF-8 or US-ASCII.  It also now accepts bytes
  and strings larger than 2 GiB.
6946

6947 6948 6949
- Issue #6083: Fix multiple segmentation faults occured when PyArg_ParseTuple
  parses nested mutating sequence.

6950 6951
- Issue #5289: Fix ctypes.util.find_library on Solaris.

6952 6953 6954 6955
- Issue #17106: Fix a segmentation fault in io.TextIOWrapper when an underlying
  stream or a decoder produces data of an unexpected type (i.e. when
  io.TextIOWrapper initialized with text stream or use bytes-to-bytes codec).

6956 6957 6958 6959
- Issue #17015: When it has a spec, a Mock object now inspects its signature
  when matching calls, so that arguments can be matched positionally or
  by name.

6960 6961 6962
- Issue #15633: httplib.HTTPResponse is now mark closed when the server
  sends less than the advertised Content-Length.

6963 6964 6965
- Issue #12268: The io module file object write methods no longer abort early
  when one of its write system calls is interrupted (EINTR).

6966 6967 6968
- Issue #6972: The zipfile module no longer overwrites files outside of
  its destination path when extracting malicious zip files.

6969 6970 6971 6972
- Issue #4844: ZipFile now raises BadZipFile when opens a ZIP file with an
  incomplete "End of Central Directory" record.  Original patch by Guilherme
  Polo and Alan McIntyre.

6973 6974 6975
- Issue #17071: Signature.bind() now works when one of the keyword arguments
  is named ``self``.

6976 6977 6978
- Issue #12004: Fix an internal error in PyZipFile when writing an invalid
  Python file.  Patch by Ben Morgan.

6979
- Have py_compile use importlib as much as possible to avoid code duplication.
6980 6981 6982
  Code now raises FileExistsError if the file path to be used for the
  byte-compiled file is a symlink or non-regular file as a warning that import
  will not keep the file path type if it writes to that path.
6983

6984
- Issue #16972: Have site.addpackage() consider already known paths even when
6985 6986
  none are explicitly passed in. Bug report and fix by Kirill.

6987 6988 6989
- Issue #1602133: on Mac OS X a shared library build (``--enable-shared``)
  now fills the ``os.environ`` variable correctly.

6990 6991 6992
- Issue #15505: `unittest.installHandler` no longer assumes SIGINT handler is
  set to a callable object.

6993 6994 6995
- Issue #13454: Fix a crash when deleting an iterator created by itertools.tee()
  if all other iterators were very advanced before.

6996 6997 6998
- Issue #12411: Fix to cgi.parse_multipart to correctly use bytes boundaries
  and bytes data. Patch by Jonas Wagner.

6999 7000 7001 7002
- Issue #16957: shutil.which() no longer searches a bare file name in the
  current directory on Unix and no longer searches a relative file path with
  a directory part in PATH directories.  Patch by Thomas Kluyver.

7003 7004 7005
- Issue #1159051: GzipFile now raises EOFError when reading a corrupted file
  with truncated header or footer.

7006 7007 7008
- Issue #16993: shutil.which() now preserves the case of the path and extension
  on Windows.

7009 7010 7011
- Issue #16992: On Windows in signal.set_wakeup_fd, validate the file
  descriptor argument.

7012 7013
- Issue #16422: For compatibility with the Python version, the C version of
  decimal now uses strings instead of integers for rounding mode constants.
7014

7015 7016 7017
- Issue #15861: tkinter now correctly works with lists and tuples containing
  strings with whitespaces, backslashes or unbalanced braces.

7018 7019 7020
- Issue #9720: zipfile now writes correct local headers for files larger than
  4 GiB.

7021 7022 7023
- Issue #16955: Fix the poll() method for multiprocessing's socket
  connections on Windows.

7024 7025
- SSLContext.load_dh_params() now properly closes the input file.

7026 7027 7028 7029
- Issue #15031: Refactor some .pyc management code to cut down on code
  duplication. Thanks to Ronan Lamy for the report and taking an initial stab
  at the problem.

7030 7031 7032
- Issue #16398: Optimize deque.rotate() so that it only moves pointers
  and doesn't touch the underlying data with increfs and decrefs.

7033 7034
- Issue #16900: Issue a ResourceWarning when an ssl socket is left unclosed.

7035 7036 7037
- Issue #13899: ``\A``, ``\Z``, and ``\B`` now correctly match the A, Z,
  and B literals when used inside character classes (e.g. ``'[\A]'``).
  Patch by Matthew Barnett.
7038

7039 7040 7041 7042
- Issue #15545: Fix regression in sqlite3's iterdump method where it was
  failing if the connection used a row factory (such as sqlite3.Row) that
  produced unsortable objects. (Regression was introduced by fix for 9750).

7043 7044
- fcntl: add F_DUPFD_CLOEXEC constant, available on Linux 2.6.24+.

7045 7046 7047
- Issue #15972: Fix error messages when os functions expecting a file name or
  file descriptor receive the incorrect type.

7048 7049 7050 7051
- Issue #8109: The ssl module now has support for server-side SNI, thanks
  to a :meth:`SSLContext.set_servername_callback` method.  Patch by Daniel
  Black.

7052 7053 7054
- Issue #16860: In tempfile, use O_CLOEXEC when available to set the
  close-on-exec flag atomically.

7055 7056
- Issue #16674: random.getrandbits() is now 20-40% faster for small integers.

7057 7058
- Issue #16009: JSON error messages now provide more information.

7059 7060
- Issue #16828: Fix error incorrectly raised by bz2.compress(b'') and
  bz2.BZ2Compressor.compress(b''). Initial patch by Martin Packman.
7061

7062 7063 7064 7065
- Issue #16833: In http.client.HTTPConnection, do not concatenate the request
  headers and body when the payload exceeds 16 KB, since it can consume more
  memory for no benefit.  Patch by Benno Leslie.

7066 7067
- Issue #16541: tk_setPalette() now works with keyword arguments.

7068 7069 7070 7071 7072 7073 7074 7075 7076 7077 7078
- Issue #16820: In configparser, `parser.popitem()` no longer raises ValueError.
  This makes `parser.clean()` work correctly.

- Issue #16820: In configparser, ``parser['section'] = {}`` now preserves
  section order within the parser. This makes `parser.update()` preserve section
  order as well.

- Issue #16820: In configparser, ``parser['DEFAULT'] = {}`` now correctly
  clears previous values stored in the default section. Same goes for
  ``parser.update({'DEFAULT': {}})``.

7079 7080
- Issue #9586: Redefine SEM_FAILED on MacOSX to keep compiler happy.

7081 7082 7083 7084
- Issue #16787: Increase asyncore and asynchat default output buffers size, to
  decrease CPU usage and increase throughput.

- Issue #10527: make multiprocessing use poll() instead of select() if available.
7085

7086 7087
- Issue #16688: Now regexes contained backreferences correctly work with
  non-ASCII strings.  Patch by Matthew Barnett.
7088

7089
- Issue #16486: Make aifc files act as context managers.
7090

7091 7092
- Issue #16485: Now file descriptors are closed if file header patching failed
  on closing an aifc file.
7093

7094 7095
- Issue #16640: Run less code under a lock in sched module.

7096 7097
- Issue #16165: sched.scheduler.run() no longer blocks a scheduler for other
  threads.
7098

7099
- Issue #16641: Default values of sched.scheduler.enter() are no longer
7100 7101
  modifiable.

7102 7103 7104
- Issue #16618: Make glob.glob match consistently across strings and bytes
  regarding leading dots.  Patch by Serhiy Storchaka.

7105 7106
- Issue #16788: Add samestat to Lib/ntpath.py

7107 7108 7109
- Issue #16713: Parsing of 'tel' urls using urlparse separates params from
  path.

7110 7111 7112
- Issue #16443: Add docstrings to regular expression match objects.
  Patch by Anton Kasyanov.

7113 7114
- Issue #15701: Fix HTTPError info method call to return the headers information.

7115 7116
- Issue #16752: Add a missing import to modulefinder. Patch by Berker Peksag.

7117 7118 7119
- Issue #16646: ftplib.FTP.makeport() might lose socket error details.
  (patch by Serhiy Storchaka)

7120 7121 7122 7123
- Issue #16626: Fix infinite recursion in glob.glob() on Windows when the
  pattern contains a wildcard in the drive or UNC path.  Patch by Serhiy
  Storchaka.

7124 7125 7126 7127
- Issue #15783: Except for the number methods, the C version of decimal now
  supports all None default values present in decimal.py. These values were
  largely undocumented.

7128 7129 7130
- Issue #11175: argparse.FileType now accepts encoding and errors
  arguments. Patch by Lucas Maystre.

7131 7132 7133
- Issue #16488: epoll() objects now support the `with` statement.  Patch
  by Serhiy Storchaka.

7134 7135 7136 7137
- Issue #16298: In HTTPResponse.read(), close the socket when there is no
  Content-Length and the incoming stream is finished.  Patch by Eran
  Rundstein.

7138 7139 7140
- Issue #16049: Add abc.ABC class to enable the use of inheritance to create
  ABCs, rather than the more cumbersome metaclass=ABCMeta. Patch by Bruno
  Dupuis.
7141

7142 7143 7144
- Expose the TCP_FASTOPEN and MSG_FASTOPEN flags in socket when they're
  available.

7145 7146 7147
- Issue #15701: Add a .headers attribute to urllib.error.HTTPError. Patch
  contributed by Berker Peksag.

7148 7149 7150 7151
- Issue #15872: Fix 3.3 regression introduced by the new fd-based shutil.rmtree
  that caused it to not ignore certain errors when ignore_errors was set.
  Patch by Alessandro Moura and Serhiy Storchaka.

7152 7153 7154
- Issue #16248: Disable code execution from the user's home directory by
  tkinter when the -E flag is passed to Python.  Patch by Zachary Ware.

7155 7156 7157
- Issue #13390: New function :func:`sys.getallocatedblocks()` returns the
  number of memory blocks currently allocated.

7158 7159
- Issue #16628: Fix a memory leak in ctypes.resize().

7160 7161 7162
- Issue #13614: Fix setup.py register failure with invalid rst in description.
  Patch by Julien Courteau and Pierre Paul Lefebvre.

7163 7164 7165
- Issue #13512: Create ~/.pypirc securely (CVE-2011-4944).  Initial patch by
  Philip Jenvey, tested by Mageia and Debian.

7166 7167 7168
- Issue #7719: Make distutils ignore ``.nfs*`` files instead of choking later
  on.  Initial patch by SilentGhost and Jeff Ramnani.

7169 7170 7171
- Issue #13120: Allow to call pdb.set_trace() from thread.
  Patch by Ilya Sandler.

7172 7173 7174
- Issue #16585: Make CJK encoders support error handlers that return bytes per
  PEP 383.

7175 7176 7177
- Issue #10182: The re module doesn't truncate indices to 32 bits anymore.
  Patch by Serhiy Storchaka.

7178 7179
- Issue #16333: use (",", ": ") as default separator in json when indent is
  specified, to avoid trailing whitespace.  Patch by Serhiy Storchaka.
7180

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7181 7182 7183 7184
- Issue #16573: In 2to3, treat enumerate() like a consuming call, so superfluous
  list() calls aren't added to filter(), map(), and zip() which are directly
  passed enumerate().

7185 7186 7187
- Issue #16464: Reset the Content-Length header when a urllib Request is reused
  with new data.

7188 7189 7190 7191
- Issue #12848: The pure Python pickle implementation now treats object
  lengths as unsigned 32-bit integers, like the C implementation does.
  Patch by Serhiy Storchaka.

7192 7193 7194
- Issue #16423: urllib.request now has support for ``data:`` URLs.  Patch by
  Mathias Panzenböck.

7195 7196 7197
- Issue #4473: Add a POP3.stls() to switch a clear-text POP3 session into
  an encrypted POP3 session, on supported servers.  Patch by Lorenzo Catucci.

7198 7199 7200
- Issue #4473: Add a POP3.capa() method to query the capabilities advertised
  by the POP3 server.  Patch by Lorenzo Catucci.

7201 7202 7203
- Issue #4473: Ensure the socket is shutdown cleanly in POP3.close().
  Patch by Lorenzo Catucci.

7204 7205
- Issue #16522: added FAIL_FAST flag to doctest.

7206
- Issue #15627: Add the importlib.abc.InspectLoader.source_to_code() method.
7207

7208 7209 7210
- Issue #16408: Fix file descriptors not being closed in error conditions
  in the zipfile module.  Patch by Serhiy Storchaka.

7211 7212 7213
- Issue #14631: Add a new :class:`weakref.WeakMethod` to simulate weak
  references to bound methods.

7214 7215 7216 7217
- Issue #16469: Fix exceptions from float -> Fraction and Decimal -> Fraction
  conversions for special values to be consistent with those for float -> int
  and Decimal -> int.  Patch by Alexey Kachayev.

7218 7219
- Issue #16481: multiprocessing no longer leaks process handles on Windows.

7220 7221 7222
- Issue #12428: Add a pure Python implementation of functools.partial().
  Patch by Brian Thorne.

7223 7224 7225
- Issue #16140: The subprocess module no longer double closes its child
  subprocess.PIPE parent file descriptors on child error prior to exec().

7226 7227 7228
- Remove a bare print to stdout from the subprocess module that could have
  happened if the child process wrote garbage to its pre-exec error pipe.

7229 7230 7231
- The subprocess module now raises its own SubprocessError instead of a
  RuntimeError in various error situations which should not normally happen.

7232 7233 7234
- Issue #16327: The subprocess module no longer leaks file descriptors
  used for stdin/stdout/stderr pipes to the child when fork() fails.

7235 7236 7237
- Issue #14396: Handle the odd rare case of waitpid returning 0 when not
  expected in subprocess.Popen.wait().

7238 7239 7240
- Issue #16411: Fix a bug where zlib.decompressobj().flush() might try to access
  previously-freed memory. Patch by Serhiy Storchaka.

7241 7242 7243
- Issue #16357: fix calling accept() on a SSLSocket created through
  SSLContext.wrap_socket().  Original patch by Jeff McNeil.

7244 7245 7246 7247 7248
- Issue #16409: The reporthook callback made by the legacy
  urllib.request.urlretrieve API now properly supplies a constant non-zero
  block_size as it did in Python 3.2 and 2.7.  This matches the behavior of
  urllib.request.URLopener.retrieve.

7249 7250 7251
- Issue #16431: Use the type information when constructing a Decimal subtype
  from a Decimal argument.

7252
- Issue #15641: Clean up deprecated classes from importlib.
7253 7254
  Patch by Taras Lyapun.

7255
- Issue #16350: zlib.decompressobj().decompress() now accumulates data from
7256
  successive calls after EOF in unused_data, instead of only saving the argument
7257 7258 7259
  to the last call. decompressobj().flush() now correctly sets unused_data and
  unconsumed_tail. A bug in the handling of MemoryError when setting the
  unconsumed_tail attribute has also been fixed. Patch by Serhiy Storchaka.
7260

7261 7262 7263
- Issue #12759: sre_parse now raises a proper error when the name of the group
  is missing.  Initial patch by Serhiy Storchaka.

7264 7265 7266
- Issue #16152: fix tokenize to ignore whitespace at the end of the code when
  no newline is found.  Patch by Ned Batchelder.

7267 7268 7269
- Issue #16284: Prevent keeping unnecessary references to worker functions
  in concurrent.futures ThreadPoolExecutor.

7270 7271 7272
- Issue #16230: Fix a crash in select.select() when one the lists changes
  size while iterated on.  Patch by Serhiy Storchaka.

7273 7274 7275
- Issue #16228: Fix a crash in the json module where a list changes size
  while it is being encoded.  Patch by Serhiy Storchaka.

7276 7277 7278
- Issue #16351: New function gc.get_stats() returns per-generation collection
  statistics.

7279 7280 7281
- Issue #14897: Enhance error messages of struct.pack and
  struct.pack_into. Patch by Matti Mäki.

7282 7283 7284
- Issue #16316: mimetypes now recognizes the .xz and .txz (.tar.xz) extensions.
  Patch by Serhiy Storchaka.

7285 7286 7287
- Issue #12890: cgitb no longer prints spurious <p> tags in text
  mode when the logdir option is specified.

7288 7289 7290
- Issue #16307: Fix multiprocessing.Pool.map_async not calling its callbacks.
  Patch by Janne Karila.

7291 7292 7293
- Issue #16305: Fix a segmentation fault occurring when interrupting
  math.factorial.

7294
- Issue #16116: Fix include and library paths to be correct when building C
7295 7296
  extensions in venvs.

7297 7298
- Issue #16245: Fix the value of a few entities in html.entities.html5.

7299 7300 7301
- Issue #16301: Fix the localhost verification in urllib/request.py for file://
  urls.

7302 7303 7304
- Issue #16250: Fix the invocations of URLError which had misplaced filename
  attribute for exception.

7305 7306 7307
- Issue #10836: Fix exception raised when file not found in urlretrieve
  Initial patch by Ezio Melotti.

7308 7309
- Issue #14398: Fix size truncation and overflow bugs in the bz2 module.

7310
- Issue #12692: Fix resource leak in urllib.request when talking to an HTTP
7311
  server that does not include a ``Connection: close`` header in its responses.
7312

7313 7314 7315
- Issue #12034: Fix bogus caching of result in check_GetFinalPathNameByHandle.
  Patch by Atsuo Ishimoto.

7316
- Improve performance of `lzma.LZMAFile` (see also issue #16034).
7317

7318 7319 7320
- Issue #16220: wsgiref now always calls close() on an iterable response.
  Patch by Brent Tubbs.

7321 7322 7323
- Issue #16270: urllib may hang when used for retrieving files via FTP by using
  a context manager.  Patch by Giampaolo Rodola'.

7324 7325 7326
- Issue #16461: Wave library should be able to deal with 4GB wav files,
  and sample rate of 44100 Hz.

7327 7328
- Issue #16176: Properly identify Windows 8 via platform.platform()

7329 7330 7331
- Issue #16088: BaseHTTPRequestHandler's send_error method includes a
  Content-Length header in it's response now. Patch by Antoine Pitrou.

7332 7333 7334
- Issue #16114: The subprocess module no longer provides a misleading error
  message stating that args[0] did not exist when either the cwd or executable
  keyword arguments specified a path that did not exist.
7335

7336 7337
- Issue #16169: Fix ctypes.WinError()'s confusion between errno and winerror.

7338 7339 7340
- Issue #16110: logging.fileConfig now accepts a pre-initialised ConfigParser
  instance.

7341 7342 7343
- Issue #1492704: shutil.copyfile() raises a distinct SameFileError now if
  source and destination are the same file. Patch by Atsuo Ishimoto.

7344 7345 7346
- Issue #13896: Make shelf instances work with 'with' as context managers.
  Original patch by Filip Gruszczyński.

7347 7348
- Issue #15417: Add support for csh and fish in venv activation scripts.

7349 7350 7351 7352
- Issue #14377: ElementTree.write and some of the module-level functions have
  a new parameter - *short_empty_elements*. It controls how elements with no
  contents are emitted.

7353 7354 7355
- Issue #16089: Allow ElementTree.TreeBuilder to work again with a non-Element
  element_factory (fixes a regression in SimpleTAL).

7356 7357 7358
- Issue #9650: List commonly used format codes in time.strftime and
  time.strptime docsttings.  Original patch by Mike Hoy.

7359 7360 7361 7362
- Issue #15452: logging configuration socket listener now has a verify option
  that allows an application to apply a verification function to the
  received configuration data before it is acted upon.

Georg Brandl's avatar
Georg Brandl committed
7363 7364
- Issue #16034: Fix performance regressions in the new `bz2.BZ2File`
  implementation.  Initial patch by Serhiy Storchaka.
7365

Georg Brandl's avatar
Georg Brandl committed
7366
- `pty.spawn()` now returns the child process status returned by `os.waitpid()`.
7367

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Georg Brandl committed
7368 7369 7370
- Issue #15756: `subprocess.poll()` now properly handles `errno.ECHILD` to
  return a returncode of 0 when the child has already exited or cannot be waited
  on.
7371

Georg Brandl's avatar
Georg Brandl committed
7372
- Issue #15323: Improve failure message of `Mock.assert_called_once_with()`.
7373

Georg Brandl's avatar
Georg Brandl committed
7374
- Issue #16064: ``unittest -m`` claims executable is "python", not "python3".
7375

Georg Brandl's avatar
Georg Brandl committed
7376
- Issue #12376: Pass on parameters in `TextTestResult.__init__()` super call.
7377

Georg Brandl's avatar
Georg Brandl committed
7378
- Issue #15222: Insert blank line after each message in mbox mailboxes.
7379

Georg Brandl's avatar
Georg Brandl committed
7380
- Issue #16013: Fix `csv.Reader` parsing issue with ending quote characters.
7381 7382
  Patch by Serhiy Storchaka.

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Georg Brandl committed
7383 7384
- Issue #15421: Fix an OverflowError in `Calendar.itermonthdates()` after
  `datetime.MAXYEAR`.  Patch by Cédric Krier.
7385

7386 7387 7388
- Issue #16112: platform.architecture does not correctly escape argument to
  /usr/bin/file.  Patch by David Benjamin.

Georg Brandl's avatar
Georg Brandl committed
7389
- Issue #15970: `xml.etree.ElementTree` now serializes correctly the empty HTML
7390 7391
  elements 'meta' and 'param'.

Georg Brandl's avatar
Georg Brandl committed
7392 7393
- Issue #15842: The `SocketIO.{readable,writable,seekable}` methods now raise
  ValueError when the file-like object is closed.  Patch by Alessandro Moura.
7394

Georg Brandl's avatar
Georg Brandl committed
7395
- Issue #15876: Fix a refleak in the `curses` module: window.encoding.
7396

Georg Brandl's avatar
Georg Brandl committed
7397 7398
- Issue #15881: Fix `atexit` hook in `multiprocessing`.  Original patch by Chris
  McDonough.
7399

Georg Brandl's avatar
Georg Brandl committed
7400 7401 7402
- Issue #15841: The readable(), writable() and seekable() methods of
  `io.BytesIO` and `io.StringIO` objects now raise ValueError when the object
  has been closed.  Patch by Alessandro Moura.
7403

Georg Brandl's avatar
Georg Brandl committed
7404 7405
- Issue #15447: Use `subprocess.DEVNULL` in webbrowser, instead of opening
  `os.devnull` explicitly and leaving it open.
7406

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Georg Brandl committed
7407 7408
- Issue #15509: `webbrowser.UnixBrowser` no longer passes empty arguments to
  Popen when ``%action`` substitutions produce empty strings.
7409

Georg Brandl's avatar
Georg Brandl committed
7410 7411 7412 7413 7414
- Issue #12776, issue #11839: Call `argparse` type function (specified by
  add_argument) only once. Before, the type function was called twice in the
  case where the default was specified and the argument was given as well.  This
  was especially problematic for the FileType type, as a default file would
  always be opened, even if a file argument was specified on the command line.
7415 7416

- Issue #15906: Fix a regression in argparse caused by the preceding change,
Georg Brandl's avatar
Georg Brandl committed
7417
  when ``action='append'``, ``type='str'`` and ``default=[]``.
7418

Christian Heimes's avatar
Christian Heimes committed
7419 7420 7421 7422 7423
- Issue #16113: Added sha3 module based on the Keccak reference implementation
  3.2. The `hashlib` module has four additional hash algorithms: `sha3_224`,
  `sha3_256`, `sha3_384` and `sha3_512`. As part of the patch some common
  code was moved from _hashopenssl.c to hashlib.h.

7424 7425 7426
- ctypes.call_commethod was removed, since its only usage was in the defunct
  samples directory.

7427 7428 7429 7430
- Issue #16692: Added TLSv1.1 and TLSv1.2 support for the ssl modules.

- Issue #16832: add abc.get_cache_token() to expose cache validity checking
  support in ABCMeta.
7431

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7432 7433 7434
IDLE
----

7435 7436 7437 7438 7439 7440 7441 7442 7443 7444 7445 7446 7447 7448 7449 7450 7451 7452 7453 7454 7455 7456 7457 7458 7459 7460 7461 7462 7463 7464 7465 7466 7467 7468 7469 7470 7471 7472 7473 7474 7475 7476
- Issue #18429: Format / Format Paragraph, now works when comment blocks
  are selected. As with text blocks, this works best when the selection
  only includes complete lines.

- Issue #18226: Add docstrings and unittests for FormatParagraph.py.
  Original patches by Todd Rovito and Phil Webster.

- Issue #18279: Format - Strip trailing whitespace no longer marks a file as
  changed when it has not been changed. This fix followed the addition of a
  test file originally written by Phil Webster (the issue's main goal).

- Issue #7136: In the Idle File menu, "New Window" is renamed "New File".
  Patch by Tal Einat, Roget Serwy, and Todd Rovito.

- Remove dead imports of imp.

- Issue #18196: Avoid displaying spurious SystemExit tracebacks.

- Issue #5492: Avoid traceback when exiting IDLE caused by a race condition.

- Issue #17511: Keep IDLE find dialog open after clicking "Find Next".
  Original patch by Sarah K.

- Issue #18055: Move IDLE off of imp and on to importlib.

- Issue #15392: Create a unittest framework for IDLE.
  Initial patch by Rajagopalasarma Jayakrishnan.
  See Lib/idlelib/idle_test/README.txt for how to run Idle tests.

- Issue #14146: Highlight source line while debugging on Windows.

- Issue #17838: Allow sys.stdin to be reassigned.

- Issue #13495: Avoid loading the color delegator twice in IDLE.

- Issue #17798: Allow IDLE to edit new files when specified on command line.

- Issue #14735: Update IDLE docs to omit "Control-z on Windows".

- Issue #17532: Always include Options menu for IDLE on OS X.
  Patch by Guilherme Simões.

Roger Serwy's avatar
Roger Serwy committed
7477 7478
- Issue #17585: Fixed IDLE regression. Now closes when using exit() or quit().

Roger Serwy's avatar
Roger Serwy committed
7479 7480 7481
- Issue #17657: Show full Tk version in IDLE's about dialog.
  Patch by Todd Rovito.

Roger Serwy's avatar
Roger Serwy committed
7482 7483
- Issue #17613: Prevent traceback when removing syntax colorizer in IDLE.

Roger Serwy's avatar
Roger Serwy committed
7484 7485
- Issue #1207589: Backwards-compatibility patch for right-click menu in IDLE.

Roger Serwy's avatar
Roger Serwy committed
7486 7487
- Issue #16887: IDLE now accepts Cancel in tabify/untabify dialog box.

7488 7489
- Issue #17625: In IDLE, close the replace dialog after it is used.

Benjamin Peterson's avatar
Benjamin Peterson committed
7490 7491 7492 7493 7494 7495
- Issue #14254: IDLE now handles readline correctly across shell restarts.

- Issue #17614: IDLE no longer raises exception when quickly closing a file.

- Issue #6698: IDLE now opens just an editor window when configured to do so.

7496
- Issue #8900: Using keyboard shortcuts in IDLE to open a file no longer
Benjamin Peterson's avatar
Benjamin Peterson committed
7497 7498 7499 7500
  raises an exception.

- Issue #6649: Fixed missing exit status in IDLE. Patch by Guilherme Polo.

7501
- Issue #17114: IDLE now uses non-strict config parser.
Benjamin Peterson's avatar
Benjamin Peterson committed
7502

7503 7504
- Issue #9290: In IDLE the sys.std* streams now implement io.TextIOBase
  interface and support all mandatory methods and properties.
Benjamin Peterson's avatar
Benjamin Peterson committed
7505

7506
- Issue #5066: Update IDLE docs. Patch by Todd Rovito.
Benjamin Peterson's avatar
Benjamin Peterson committed
7507 7508 7509 7510

- Issue #16829: IDLE printing no longer fails if there are spaces or other
  special characters in the file path.

7511
- Issue #16491: IDLE now prints chained exception tracebacks.
Benjamin Peterson's avatar
Benjamin Peterson committed
7512

7513
- Issue #16819: IDLE method completion now correctly works for bytes literals.
Benjamin Peterson's avatar
Benjamin Peterson committed
7514

7515 7516
- Issue #16504: IDLE now catches SyntaxErrors raised by tokenizer. Patch by
  Roger Serwy.
Benjamin Peterson's avatar
Benjamin Peterson committed
7517

7518 7519
- Issue #16511: Use default IDLE width and height if config param is not valid.
  Patch Serhiy Storchaka.
Benjamin Peterson's avatar
Benjamin Peterson committed
7520

7521
- Issue #1207589: Add Cut/Copy/Paste items to IDLE right click Context Menu.
7522
  Patch by Todd Rovito.
Benjamin Peterson's avatar
Benjamin Peterson committed
7523

7524 7525
- Issue #16123: IDLE - deprecate running without a subprocess.
  Patch by Roger Serwy.
Benjamin Peterson's avatar
Benjamin Peterson committed
7526

7527 7528 7529
Tests
-----

7530 7531 7532 7533 7534 7535 7536 7537 7538 7539 7540 7541 7542 7543 7544 7545 7546 7547 7548 7549 7550 7551 7552 7553 7554 7555 7556 7557 7558 7559 7560 7561 7562 7563 7564 7565 7566
- Issue #1666318: Add a test that shutil.copytree() retains directory
  permissions.  Patch by Catherine Devlin.

- Issue #18273: move the tests in Lib/test/json_tests to Lib/test/test_json
  and make them discoverable by unittest.  Patch by Zachary Ware.

- Fix a fcntl test case on KFreeBSD, Debian #708653 (Petr Salinger).

- Issue #18396: Fix spurious test failure in test_signal on Windows when
  faulthandler is enabled (Patch by Jeremy Kloth)

- Issue #17046: Fix broken test_executable_without_cwd in test_subprocess.

- Issue #15415: Add new temp_dir() and change_cwd() context managers to
  test.support, and refactor temp_cwd() to use them.  Patch by Chris Jerdonek.

- Issue #15494: test.support is now a package rather than a module (Initial
  patch by Indra Talip)

- Issue #17944: test_zipfile now discoverable and uses subclassing to
  generate tests for different compression types.  Fixed a bug with skipping
  some tests due to use of exhausted iterators.

- Issue #18266: test_largefile now works with unittest test discovery and
  supports running only selected tests.  Patch by Zachary Ware.

- Issue #17767: test_locale now works with unittest test discovery.
  Original patch by Zachary Ware.

- Issue #18375: Assume --randomize when --randseed is used for running the
  testsuite.

- Issue #11185: Fix test_wait4 under AIX.  Patch by Sébastien Sablé.

- Issue #18207: Fix test_ssl for some versions of OpenSSL that ignore seconds
  in ASN1_TIME fields.

7567
- Issue #18094: test_uuid no longer reports skipped tests as passed.
7568 7569 7570 7571 7572 7573 7574 7575 7576 7577 7578 7579 7580 7581 7582 7583 7584 7585 7586 7587 7588 7589 7590 7591 7592 7593 7594 7595 7596 7597 7598 7599 7600 7601 7602 7603 7604 7605 7606 7607 7608 7609 7610 7611 7612 7613 7614

- Issue #17992: Add timeouts to asyncore and asynchat tests so that they won't
  accidentally hang.

- Issue #17833: Fix test_gdb failures seen on machines where debug symbols
  for glibc are available (seen on PPC64 Linux).

- Issue #7855: Add tests for ctypes/winreg for issues found in IronPython.
  Initial patch by Dino Viehland.

- Issue #11078: test___all__ now checks for duplicates in __all__.
  Initial patch by R. David Murray.

- Issue #17712: Fix test_gdb failures on Ubuntu 13.04.

- Issue #17835: Fix test_io when the default OS pipe buffer size is larger
  than one million bytes.

- Issue #17065: Use process-unique key for winreg tests to avoid failures if
  test is run multiple times in parallel (eg: on a buildbot host).

- Issue #12820: add tests for the xml.dom.minicompat module.
  Patch by John Chandler and Phil Connell.

- Issue #17691: test_univnewlines now works with unittest test discovery.
  Patch by Zachary Ware.

- Issue #17790: test_set now works with unittest test discovery.
  Patch by Zachary Ware.

- Issue #17789: test_random now works with unittest test discovery.
  Patch by Zachary Ware.

- Issue #17779: test_osx_env now works with unittest test discovery.
  Patch by Zachary Ware.

- Issue #17766: test_iterlen now works with unittest test discovery.
  Patch by Zachary Ware.

- Issue #17690: test_time now works with unittest test discovery.
  Patch by Zachary Ware.

- Issue #17692: test_sqlite now works with unittest test discovery.
  Patch by Zachary Ware.

- Issue #11995: test_pydoc doesn't import all sys.path modules anymore.

7615 7616
- Issue #17448: test_sax now skips if there are no xml parsers available
  instead of raising an ImportError.
7617

Ezio Melotti's avatar
Ezio Melotti committed
7618 7619
- Issue #11420: make test suite pass with -B/DONTWRITEBYTECODE set.
  Initial patch by Thomas Wouters.
7620

7621 7622
- Issue #10652: make tcl/tk tests run after __all__ test, patch by
  Zachary Ware.
7623

Ezio Melotti's avatar
Ezio Melotti committed
7624
- Issue #11963: remove human verification from test_parser and test_subprocess.
7625

7626 7627
- Issue #11732: add a new suppress_crash_popup() context manager to test.support
  that disables crash popups on Windows and use it in test_faulthandler and
7628
  test_capi.
7629

7630
- Issue #13898: test_ssl no longer prints a spurious stack trace on Ubuntu.
7631

7632 7633 7634
- Issue #17283: Share code between `__main__.py` and `regrtest.py` in
  `Lib/test`.

Ezio Melotti's avatar
Ezio Melotti committed
7635
- Issue #17249: convert a test in test_capi to use unittest and reap threads.
7636

7637 7638 7639 7640
- Issue #17107: Test client-side SNI support in urllib.request thanks to
  the new server-side SNI support in the ssl module.  Initial patch by
  Daniel Black.

7641 7642
- Issue #17041: Fix testing when Python is configured with the
  --without-doc-strings.
7643

7644 7645
- Issue #16923: Fix ResourceWarnings in test_ssl.

7646
- Issue #15539: Added regression tests for Tools/scripts/pindent.py.
7647

7648 7649 7650
- Issue #17479: test_io now works with unittest test discovery.
  Patch by Zachary Ware.

7651 7652 7653
- Issue #17066: test_robotparser now works with unittest test discovery.
  Patch by Zachary Ware.

7654 7655
- Issue #17334: test_index now works with unittest test discovery.
  Patch by Zachary Ware.
7656

7657 7658 7659
- Issue #17333: test_imaplib now works with unittest test discovery.
  Patch by Zachary Ware.

7660 7661 7662
- Issue #17082: test_dbm* now work with unittest test discovery.
  Patch by Zachary Ware.

7663 7664 7665
- Issue #17079: test_ctypes now works with unittest test discovery.
  Patch by Zachary Ware.

7666 7667 7668
- Issue #17304: test_hash now works with unittest test discovery.
  Patch by Zachary Ware.

7669 7670 7671
- Issue #17303: test_future* now work with unittest test discovery.
  Patch by Zachary Ware.

7672 7673 7674
- Issue #17163: test_file now works with unittest test discovery.
  Patch by Zachary Ware.

7675 7676 7677
- Issue #16925: test_configparser now works with unittest test discovery.
  Patch by Zachary Ware.

7678 7679 7680
- Issue #16918: test_codecs now works with unittest test discovery.
  Patch by Zachary Ware.

7681 7682 7683
- Issue #16919: test_crypt now works with unittest test discovery.
  Patch by Zachary Ware.

7684 7685 7686
- Issue #16910: test_bytes, test_unicode, and test_userstring now work with
  unittest test discovery.  Patch by Zachary Ware.

7687 7688 7689
- Issue #16905: test_warnings now works with unittest test discovery.
  Initial patch by Berker Peksag.

7690 7691 7692
- Issue #16898: test_bufio now works with unittest test discovery.
  Patch by Zachary Ware.

7693 7694 7695
- Issue #16888: test_array now works with unittest test discovery.
  Patch by Zachary Ware.

7696 7697 7698
- Issue #16896: test_asyncore now works with unittest test discovery.
  Patch by Zachary Ware.

7699 7700 7701
- Issue #16897: test_bisect now works with unittest test discovery.
  Initial patch by Zachary Ware.

7702 7703 7704
- Issue #16852: test_genericpath, test_posixpath, test_ntpath, and test_macpath
  now work with unittest test discovery.  Patch by Zachary Ware.

7705 7706
- Issue #16748: test_heapq now works with unittest test discovery.

Brian Curtin's avatar
Brian Curtin committed
7707 7708 7709
- Issue #10646: Tests rearranged for os.samefile/samestat to check for not
  just symlinks but also hard links.

7710 7711
- Issue #15302: Switch regrtest from using getopt to using argparse.

7712 7713
- Issue #15324: Fix regrtest parsing of --fromfile, --match, and --randomize
  options.
7714

7715 7716 7717
- Issue #16702: test_urllib2_localnet tests now correctly ignores proxies for
  localhost tests.

7718 7719
- Issue #16664: Add regression tests for glob's behaviour concerning entries
  starting with a ".".  Patch by Sebastian Kreft.
7720

7721 7722 7723
- Issue #13390: The ``-R`` option to regrtest now also checks for memory
  allocation leaks, using :func:`sys.getallocatedblocks()`.

Ezio Melotti's avatar
Ezio Melotti committed
7724 7725
- Issue #16559: Add more tests for the json module, including some from the
  official test suite at json.org.  Patch by Serhiy Storchaka.
7726

7727 7728 7729
- Issue #16661: Fix the `os.getgrouplist()` test by not assuming that it gives
  the same output as :command:`id -G`.

7730 7731 7732
- Issue #16115: Add some tests for the executable argument to
  subprocess.Popen().  Initial patch by Kushal Das.

7733 7734 7735
- Issue #16126: PyErr_Format format mismatch in _testcapimodule.c.
  Patch by Serhiy Storchaka.

Georg Brandl's avatar
Georg Brandl committed
7736 7737
- Issue #15304: Fix warning message when `os.chdir()` fails inside
  `test.support.temp_cwd()`.  Patch by Chris Jerdonek.
7738

Georg Brandl's avatar
Georg Brandl committed
7739 7740
- Issue #15802: Fix test logic in `TestMaildir.test_create_tmp()`. Patch by
  Serhiy Storchaka.
7741

Georg Brandl's avatar
Georg Brandl committed
7742 7743
- Issue #15557: Added a test suite for the webbrowser module, thanks to Anton
  Barkovsky.
7744

Ned Deily's avatar
Ned Deily committed
7745 7746
- Issue #16698: Skip posix test_getgroups when built with OS X
  deployment target prior to 10.6.
7747

7748 7749 7750
Build
-----

7751 7752 7753 7754 7755 7756 7757 7758 7759 7760 7761 7762 7763 7764 7765 7766 7767 7768 7769 7770 7771
- Issue #16067: Add description into MSI file to replace installer's
  temporary name.

- Issue #18257: Fix readlink usage in python-config.  Install the python
  version again on Darwin.

- Issue #18481: Add C coverage reporting with gcov and lcov. A new make target
  "coverage-report" creates an instrumented Python build, runs unit tests
  and creates a HTML. The report can be updated with "make coverage-lcov".

- Issue #17845: Clarified the message printed when some module are not built.

- Issue #18256: Compilation fix for recent AIX releases.  Patch by
  David Edelsohn.

- Issue #17547: In configure, explicitly pass -Wformat for the benefit for GCC
  4.8.

- Issue #15172: Document NASM 2.10+ as requirement for building OpenSSL 1.0.1
  on Windows.

7772 7773 7774
- Issue #17591: Use lowercase filenames when including Windows header files.
  Patch by Roumen Petrov.

Benjamin Peterson's avatar
Benjamin Peterson committed
7775 7776
- Issue #17550: Fix the --enable-profiling configure switch.

7777 7778
- Issue #17425: Build with openssl 1.0.1d on Windows.

7779 7780 7781
- Issue #16754: Fix the incorrect shared library extension on linux. Introduce
  two makefile macros SHLIB_SUFFIX and EXT_SUFFIX. SO now has the value of
  SHLIB_SUFFIX again (as in 2.x and 3.1). The SO macro is removed in 3.4.
7782

7783 7784
- Issue #5033: Fix building of the sqlite3 extension module when the
  SQLite library version has "beta" in it. Patch by Andreas Pelme.
7785

7786 7787
- Issue #17228: Fix building without pymalloc.

7788 7789
- Issue #3718: Use AC_ARG_VAR to set MACHDEP in configure.ac.

7790 7791
- Issue #16235: Implement python-config as a shell script.

7792 7793
- Issue #16769: Remove outdated Visual Studio projects.

7794 7795
- Issue #17031: Fix running regen in cross builds.

7796
- Issue #3754: fix typo in pthread AC_CACHE_VAL.
7797

7798 7799 7800
- Issue #15484: Fix _PYTHON_PROJECT_BASE for srcdir != builddir builds;
  use _PYTHON_PROJECT_BASE in distutils/sysconfig.py.

7801
- Drop support for Windows 2000 (changeset e52df05b496a).
7802

7803
- Issue #17029: Let h2py search the multiarch system include directory.
7804

7805 7806
- Issue #16953: Fix socket module compilation on platforms with
  HAVE_BROKEN_POLL. Patch by Jeffrey Armstrong.
7807

7808 7809
- Issue #16320: Remove redundant Makefile dependencies for strings and bytes.

7810 7811 7812
- Cross compiling needs host and build settings. configure no longer
  creates a broken PYTHON_FOR_BUILD variable when --build is missing.

7813 7814 7815
- Fix cross compiling issue in setup.py, ensure that lib_dirs and inc_dirs are
  defined in cross compiling mode, too.

7816 7817
- Issue #16836: Enable IPv6 support even if IPv6 is disabled on the build host.

7818 7819
- Issue #16593: Have BSD 'make -s' do the right thing, thanks to Daniel Shahaf

7820
- Issue #16262: fix out-of-src-tree builds, if mercurial is not installed.
7821

7822 7823 7824
- Issue #15298: ensure _sysconfigdata is generated in build directory, not
  source directory.

7825 7826 7827 7828
- Issue #15833: Fix a regression in 3.3 that resulted in exceptions being
  raised if importlib failed to write byte-compiled files.  This affected
  attempts to build Python out-of-tree from a read-only source directory.

Georg Brandl's avatar
Georg Brandl committed
7829 7830
- Issue #15923: Fix a mistake in ``asdl_c.py`` that resulted in a TypeError
  after 2801bf875a24 (see #15801).
7831

7832 7833
- Issue #16135: Remove OS/2 support.

7834 7835
- Issue #15819: Make sure we can build Python out-of-tree from a read-only
  source directory.  (Somewhat related to issue #9860.)
7836

Ned Deily's avatar
Ned Deily committed
7837 7838 7839
- Issue #15587: Enable Tk high-resolution text rendering on Macs with
  Retina displays.  Applies to Tkinter apps, such as IDLE, on OS X
  framework builds linked with Cocoa Tk 8.5.
7840

7841
- Issue #17161: make install now also installs a python3 man page.
7842

7843 7844
C-API
-----
7845

7846 7847 7848 7849 7850 7851 7852 7853 7854 7855 7856 7857 7858 7859 7860 7861
- Issue #18351: Fix various issues in a function in importlib provided to help
  PyImport_ExecCodeModuleWithPathnames() (and thus by extension
  PyImport_ExecCodeModule() and PyImport_ExecCodeModuleEx()).

- Issue #9369: The types of `char*` arguments of PyObject_CallFunction() and
  PyObject_CallMethod() now changed to `const char*`.  Based on patches by
  Jörg Müller and Lars Buitinck.

- Issue #17206: Py_CLEAR(), Py_DECREF(), Py_XINCREF() and Py_XDECREF() now
  expand their arguments once instead of multiple times.  Patch written by Illia
  Polosukhin.

- Issue #17522: Add the PyGILState_Check() API.

- Issue #17327: Add PyDict_SetDefault.

7862
- Issue #16881: Fix Py_ARRAY_LENGTH macro for GCC < 3.1.
7863

7864 7865 7866 7867 7868 7869 7870 7871 7872 7873
- Issue #16505: Remove unused Py_TPFLAGS_INT_SUBCLASS.

- Issue #16086: PyTypeObject.tp_flags and PyType_Spec.flags are now unsigned
  (unsigned long and unsigned int) to avoid an undefined behaviour with
  Py_TPFLAGS_TYPE_SUBCLASS ((1 << 31). PyType_GetFlags() result type is
  now unsigned too (unsigned long, instead of long).

- Issue #16166: Add PY_LITTLE_ENDIAN and PY_BIG_ENDIAN macros and unified
  endianness detection and handling.

7874 7875 7876
Documentation
-------------

Terry Jan Reedy's avatar
Terry Jan Reedy committed
7877 7878 7879 7880
- Issue #23006: Improve the documentation and indexing of dict.__missing__.
  Add an entry in the language datamodel special methods section.
  Revise and index its discussion in the stdtypes mapping/dict section.

7881 7882 7883 7884 7885 7886 7887 7888 7889 7890 7891 7892 7893 7894 7895
- Issue #17701: Improving strftime documentation.

- Issue #18440: Clarify that `hash()` can truncate the value returned from an
  object's custom `__hash__()` method.

- Issue #17844: Add links to encoders and decoders for bytes-to-bytes codecs.

- Issue #14097: improve the "introduction" page of the tutorial.

- Issue #17977: The documentation for the cadefault argument's default value
  in urllib.request.urlopen() is fixed to match the code.

- Issue #6696: add documentation for the Profile objects, and improve
  profile/cProfile docs.  Patch by Tom Pinckney.

Terry Jan Reedy's avatar
Terry Jan Reedy committed
7896 7897
- Issue #15940: Specify effect of locale on time functions.

7898
- Issue #17538: Document XML vulnerabilties
7899

7900 7901 7902
- Issue #16642: sched.scheduler timefunc initial default is time.monotonic.
  Patch by Ramchandra Apte

7903 7904
- Issue #17047: remove doubled words in docs and docstrings
  reported by Serhiy Storchaka and Matthew Barnett.
7905

7906 7907 7908
- Issue #15465: Document the versioning macros in the C API docs rather than
  the standard library docs. Patch by Kushal Das.

7909
- Issue #16406: Combine the pages for uploading and registering to PyPI.
7910

7911 7912
- Issue #16403: Document how distutils uses the maintainer field in
  PKG-INFO. Patch by Jyrki Pulliainen.
7913

7914 7915
- Issue #16695: Document how glob handles filenames starting with a
  dot. Initial patch by Jyrki Pulliainen.
7916

7917 7918 7919
- Issue #8890: Stop advertising an insecure practice by replacing uses
  of the /tmp directory with better alternatives in the documentation.
  Patch by Geoff Wilson.
7920

7921
- Issue #17203: add long option names to unittest discovery docs.
7922

Ezio Melotti's avatar
Ezio Melotti committed
7923 7924
- Issue #13094: add "Why do lambdas defined in a loop with different values
  all return the same result?" programming FAQ.
7925

Brian Curtin's avatar
Brian Curtin committed
7926 7927
- Issue #14901: Update portions of the Windows FAQ.
  Patch by Ashish Nitin Patil.
7928

7929 7930 7931
- Issue #16267: Better document the 3.3+ approach to combining
  @abstractmethod with @staticmethod, @classmethod and @property

7932 7933 7934
- Issue #15209: Clarify exception chaining description in exceptions module
  documentation

7935
- Issue #15990: Improve argument/parameter documentation.
7936

7937 7938 7939
- Issue #16209: Move the documentation for the str built-in function to a new
  str class entry in the "Text Sequence Type" section.

7940 7941
- Issue #13538: Improve str() and object.__str__() documentation.

Brett Cannon's avatar
Brett Cannon committed
7942 7943
- Issue #16489: Make it clearer that importlib.find_loader() needs parent
  packages to be explicitly imported.
7944

7945 7946
- Issue #16400: Update the description of which versions of a given package
  PyPI displays.
7947

7948 7949
- Issue #15677: Document that zlib and gzip accept a compression level of 0 to
  mean 'no compression'. Patch by Brian Brazil.
7950

7951 7952 7953
- Issue #16197: Update winreg docstrings and documentation to match code.
  Patch by Zachary Ware.

Ezio Melotti's avatar
Ezio Melotti committed
7954 7955
- Issue #8040: added a version switcher to the documentation.  Patch by
  Yury Selivanov.
7956

7957 7958 7959
- Issue #16241: Document -X faulthandler command line option.
  Patch by Marek Šuppa.

7960 7961 7962
- Additional comments and some style changes in the concurrent.futures URL
  retrieval example

7963 7964 7965
- Issue #16115: Improve subprocess.Popen() documentation around args, shell,
  and executable arguments.

Hynek Schlawack's avatar
Hynek Schlawack committed
7966 7967 7968
- Issue #13498: Clarify docs of os.makedirs()'s exist_ok argument.  Done with
  great native-speaker help from R. David Murray.

Georg Brandl's avatar
Georg Brandl committed
7969
- Issue #15533: Clarify docs and add tests for `subprocess.Popen()`'s cwd
7970
  argument.
7971

Ezio Melotti's avatar
Ezio Melotti committed
7972 7973
- Issue #15979: Improve timeit documentation.

Georg Brandl's avatar
Georg Brandl committed
7974
- Issue #16036: Improve documentation of built-in `int()`'s signature and
7975 7976
  arguments.

Georg Brandl's avatar
Georg Brandl committed
7977
- Issue #15935: Clarification of `argparse` docs, re: add_argument() type and
7978 7979 7980 7981 7982
  default arguments.  Patch contributed by Chris Jerdonek.

- Issue #11964: Document a change in v3.2 to the behavior of the indent
  parameter of json encoding operations.

Ned Deily's avatar
Ned Deily committed
7983 7984
- Issue #15116: Remove references to appscript as it is no longer being
  supported.
7985

7986 7987 7988
Tools/Demos
-----------

7989 7990 7991 7992 7993 7994 7995 7996 7997 7998 7999 8000 8001 8002 8003 8004
- Issue #18817: Fix a resource warning in Lib/aifc.py demo.  Patch by
  Vajrasky Kok.

- Issue #18439: Make patchcheck work on Windows for ACKS, NEWS.

- Issue #18448: Fix a typo in Tools/demo/eiffel.py.

- Issue #18457: Fixed saving of formulas and complex numbers in
  Tools/demo/ss1.py.

- Issue #18449: Make Tools/demo/ss1.py work again on Python 3.  Patch by
  Févry Thibault.

- Issue #12990: The "Python Launcher" on OSX could not launch python scripts
  that have paths that include wide characters.

8005 8006
- Issue #15239: Make mkstringprep.py work again on Python 3.

8007
- Issue #17028: Allowed Python arguments to be supplied to the Windows
8008 8009
  launcher.

8010 8011
- Issue #17156: pygettext.py now detects the encoding of source files and
  correctly writes and escapes non-ascii characters.
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- Issue #15539: Fix a number of bugs in Tools/scripts/pindent.py.  Now
  pindent.py works with a "with" statement.  pindent.py no longer produces
  improper indentation.  pindent.py now works with continued lines broken after
  "class" or "def" keywords and with continuations at the start of line.
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- Issue #11797: Add a 2to3 fixer that maps reload() to imp.reload().

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- Issue #10966: Remove the concept of unexpected skipped tests.

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- Issue #9893: Removed the Misc/Vim directory.

- Removed the Misc/TextMate directory.

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- Issue #16245: Add the Tools/scripts/parse_html5_entities.py script to parse
  the list of HTML5 entities and update the html.entities.html5 dictionary.

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- Issue #15378: Fix Tools/unicode/comparecodecs.py.  Patch by Serhiy Storchaka.
Ronald Oussoren's avatar
Ronald Oussoren committed
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- Issue #16549: Make json.tool work again on Python 3 and add tests.
  Initial patch by Berker Peksag and Serhiy Storchaka.

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- Issue #13301: use ast.literal_eval() instead of eval() in Tools/i18n/msgfmt.py.
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  Patch by Serhiy Storchaka.

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Windows
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- Issue #18569: The installer now adds .py to the PATHEXT variable when extensions
  are registered. Patch by Paul Moore.

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**(For information about older versions, consult the HISTORY file.)**