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What's New in Python 3.2.2?
===========================

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*Release date: XX-XXX-2011*
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Core and Builtins
-----------------

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

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

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- Verify the types of AST strings and identifiers provided by the user before
  compiling them.

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

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

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

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- Issue #12475: Prevent generators from leaking their exception state into the
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  caller's frame as they return for the last time.
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Library
-------

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- Issue #10087: Fix the html output format of the calendar module.

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

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

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

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

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- Issue #8887: "pydoc somebuiltin.somemethod" (or help('somebuiltin.somemethod')
  in Python code) now finds the doc of the method.

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

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

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

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

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

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

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

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

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- Issue #9611, #9015: FileIO.read() clamps the length to INT_MAX on Windows.
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- Issue #10883: Fix socket leaks in urllib.request when using FTP.
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- Issue #12571: Add a plat-linux3 directory mirroring the plat-linux2
  directory, so that "import DLFCN" and other similar imports work on
  Linux 3.0.

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

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- Close the call queue in concurrent.futures.ProcessPoolExecutor when
  shutdown() is called, without waiting for the garbage collector to kick in.

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

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- Issue #4376: ctypes now supports nested structures with an endianness
  different than that of the parent structure.  Patch by Vlad Riscutia.
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- Raise ValueError when attempting to set the _CHUNK_SIZE attribute of a
  TextIOWrapper to a huge value, not TypeError.

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

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- Issue #12451: pydoc: html_getfile() now uses tokenize.open() to support
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  Python modules using a encoding different than UTF-8 (reading the coding
  cookie of the module).
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- Issue #12451: pydoc: importfile() now opens the Python module in binary mode,
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  instead of text mode using the locale encoding, to avoid encoding issues.

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- Issue #12451: runpy: run_path() now opens the Python module in binary mode,
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  instead of text mode using the locale encoding, to support other encodings
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  than UTF-8 (modules using the coding cookie).
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- Issue #12451: xml.dom.pulldom: parse() now opens files in binary mode instead
  of the text mode (using the locale encoding) to avoid encoding issues.

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Extension Modules
-----------------

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

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C-API
-----

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Build
-----

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

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

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

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

- Issue #10639: reindent.py no longer converts newlines and will raise
  an error if attempting to convert a file with mixed newlines.
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Tests
-----

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

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

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

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

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- Try harder to reap dangling threads in test.support.reap_threads().

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

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

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

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

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

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

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

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


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What's New in Python 3.2.1?
===========================

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*Release date: 10-Jul-2011*
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Library
-------

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

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Tests
-----

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

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

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What's New in Python 3.2.1 release candidate 2?
===============================================
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*Release date: 03-Jul-2011*
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Core and Builtins
-----------------

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- Issue #12291: You can now load multiple marshalled objects from a stream, with
  other data interleaved between marshalled objects.
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- Issue #12084: os.stat on Windows now works properly with relative symbolic
  links when called from any directory.

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

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

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- Issue #12147: Adjust the new-in-3.2 smtplib.send_message method for better
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  conformance to the RFCs: correctly handle Sender and Resent headers.
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- Issue #12352: Fix a deadlock in multiprocessing.Heap when a block is freed by
  the garbage collector while the Heap lock is held.
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- Issue #12451: The XInclude default loader of xml.etree now decodes files from
  UTF-8 instead of the locale encoding if the encoding is not specified. It now
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  also opens XML files for the parser in binary mode instead of the text mode to
  avoid encoding issues.
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- Issue #12451: doctest.debug_script() doesn't create a temporary file anymore
  to avoid encoding issues.
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- Issue #12451: pydoc.synopsis() now reads the encoding cookie if available, to
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  read the Python module from the right encoding.
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- Issue #12451: distutils now opens the setup script in binary mode to read the
  encoding cookie, instead of opening it in UTF-8.

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- Issue #9516: On Mac OS X, change Distutils to no longer globally attempt to
  check or set the MACOSX_DEPLOYMENT_TARGET environment variable for the
  interpreter process.  This could cause failures in non-Distutils subprocesses
  and was unreliable since tests or user programs could modify the interpreter
  environment after Distutils set it.  Instead, have Distutils set the the
  deployment target only in the environment of each build subprocess.  It is
  still possible to globally override the default by setting
  MACOSX_DEPLOYMENT_TARGET before launching the interpreter; its value must be
  greater or equal to the default value, the value with which the interpreter
  was built.

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

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- Issue #11584: email.header.decode_header no longer fails if the header passed
  to it is a Header object, and Header/make_header no longer fail if given
  binary unknown-8bit input.
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- Issue #11700: mailbox proxy object close methods can now be called multiple
  times without error.

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

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

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

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- Issue #12009: Fixed regression in netrc file comment handling.
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- Issue #10694: zipfile now ignores garbage at the end of a zipfile.

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

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

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

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- Named tuples now work correctly with vars().

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

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- Issue #985064: Make plistlib more resilient to faulty input plists.  Patch by
  Mher Movsisyan.
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- Issue #12175: RawIOBase.readall() now returns None if read() returns None.
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- Issue #12175: FileIO.readall() now raises a ValueError instead of an IOError
  if the file is closed.
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- Issue #12070: Fix the Makefile parser of the sysconfig module to handle
  correctly references to "bogus variable" (e.g. "prefix=$/opt/python").

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- Issue #12100: Don't reset incremental encoders of CJK codecs at each call to
  their encode() method anymore, but continue to call the reset() method if the
  final argument is True.
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- Issue #5715: In socketserver, close the server socket in the child process.
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- Correct lookup of __dir__ on objects. Among other things, this causes errors
  besides AttributeError found on lookup to be propagated.

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- Issue #12124: zipimport doesn't keep a reference to zlib.decompress() anymore
  to be able to unload the module.
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- Issue #12065: connect_ex() on an SSL socket now returns the original errno
  when the socket's timeout expires (it used to return None).

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Extension Modules
-----------------
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- Issue #12404: Remove C89 incompatible code from mmap module. Patch by Akira
  Kitada.

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- Issue #12221: Replace pyexpat.__version__ with the Python version.
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Build
-----

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- Issue #8746: Correct faulty configure checks so that os.chflags() and
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  os.lchflags() are once again built on systems that support these functions
  (*BSD and OS X).  Also add new stat file flags for OS X (UF_HIDDEN and
  UF_COMPRESSED).
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- Issue #11217: For 64-bit/32-bit Mac OS X universal framework builds, ensure
  "make install" creates symlinks in --prefix bin for the "-32" files in the
  framework bin directory like the installer does.
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Tests
-----

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

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

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- Issue #12141: Install a copy of template C module file so that test_build_ext
  of test_distutils is no longer silently skipped when run outside of a build
  directory.
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- Issue #8746: Add additional tests for os.chflags() and os.lchflags().  Patch
  by Garrett Cooper.
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- Issue #10736: Fix test_ttk test_widgets failures with Cocoa Tk 8.5.9 on Mac
  OS X.  (Patch by Ronald Oussoren)
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- Issue #12057: Add tests for ISO 2022 codecs (iso2022_jp, iso2022_jp_2,
  iso2022_kr).

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What's New in Python 3.2.1 release candidate 1?
===============================================
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*Release date: 15-May-2011*
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Core and Builtins
-----------------

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

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- Issue #12044: Fixed subprocess.Popen when used as a context manager to
  wait for the process to end when exiting the context to avoid unintentionally
  leaving zombie processes around.

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

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Library
-------

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

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

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- Issue #12012: ssl.PROTOCOL_SSLv2 becomes optional.

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

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

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

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

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

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

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

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

Build
-----

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

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

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

Tests
-----

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

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

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

- Issue #11910: Fix test_heapq to skip the C tests when _heapq is missing.


What's New in Python 3.2.1 beta 1?
==================================

*Release date: 08-May-2011*

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

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- Issue #1856: Avoid crashes and lockups when daemon threads run while the
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  interpreter is shutting down; instead, these threads are now killed when they
  try to take the GIL.
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- Issue #9756: When calling a method descriptor or a slot wrapper descriptor,
  the check of the object type doesn't read the __class__ attribute anymore.
  Fix a crash if a class override its __class__ attribute (e.g. a proxy of the
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  str type). Patch written by Andreas Stührk.
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- Issue #10914: Initialize correctly the filesystem codec when creating a new
  subinterpreter to fix a bootstrap issue with codecs implemented in Python, as
  the ISO-8859-15 codec.

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- Issue #10517: After fork(), reinitialize the TLS used by the PyGILState_*
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  APIs, to avoid a crash with the pthread implementation in RHEL 5.  Patch by
  Charles-François Natali.
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- Issue #6780: fix starts/endswith error message to mention that tuples are
  accepted too.

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- Issue #5057: fix a bug in the peepholer that led to non-portable pyc files
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  between narrow and wide builds while optimizing BINARY_SUBSCR on non-BMP chars
  (e.g. "\U00012345"[0]).
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- Issue #11845: Fix typo in rangeobject.c that caused a crash in
  compute_slice_indices.  Patch by Daniel Urban.

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

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- Issue #11395: io.FileIO().write() clamps the data length to 32,767 bytes on
  Windows if the file is a TTY to workaround a Windows bug. The Windows console
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  returns an error (12: not enough space error) on writing into stdout if stdout
  mode is binary and the length is greater than 66,000 bytes (or less, depending
  on heap usage).
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- Issue #11320: fix bogus memory management in Modules/getpath.c, leading to a
  possible crash when calling Py_SetPath().
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- Issue #11510: Fixed optimizer bug which turned "a,b={1,1}" into "a,b=(1,1)".

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

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- Issue #11450: Don't truncate hg version info in Py_GetBuildInfo() when there
  are many tags (e.g. when using mq).  Patch by Nadeem Vawda.
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- Issue #11246: Fix PyUnicode_FromFormat("%V") to decode the byte string from
  UTF-8 (with replace error handler) instead of ISO-8859-1 (in strict mode).
  Patch written by Ray Allen.

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- Issue #11286: Raise a ValueError from calling PyMemoryView_FromBuffer with a
  buffer struct having a NULL data pointer.
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- Issue #11272: On Windows, input() strips '\r' (and not only '\n'), and
  sys.stdin uses universal newline (replace '\r\n' by '\n').

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- issue #11828: startswith and endswith don't accept None as slice index.  Patch
  by Torsten Becker.
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- Issue #10830: Fix PyUnicode_FromFormatV("%c") for non-BMP characters on
  narrow build.

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- Check for NULL result in PyType_FromSpec.

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- Issue #11386: bytearray.pop() now throws IndexError when the bytearray is
  empty, instead of OverflowError.

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Library
-------
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- Issue #11927: SMTP_SSL now uses port 465 by default as documented.  Patch by
  Kasun Herath.
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- Issue #12002: ftplib's abort() method raises TypeError.
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- Issue #11999: fixed sporadic sync failure mailbox.Maildir due to its trying to
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  detect mtime changes by comparing to the system clock instead of to the
  previous value of the mtime.

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

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- Issue #12000: When a SSL certificate has a subjectAltName without any dNSName
  entry, ssl.match_hostname() should use the subject's commonName.  Patch by
  Nicolas Bareil.
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- Issue #11647: objects created using contextlib.contextmanager now support more
  than one call to the function when used as a decorator. Initial patch by Ysj
  Ray.
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- logging: don't define QueueListener if Python has no thread support.

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

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

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- Issue #11858: configparser.ExtendedInterpolation expected lower-case section
  names.

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

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

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

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

588 589
- Issue #11492: fix several issues with header folding in the email package.

590 591
- Issue #11852: Add missing imports and update tests.

592 593 594
- Issue #11875: collections.OrderedDict's __reduce__ was temporarily
  mutating the object instead of just working on a copy.

595
- Issue #11467: Fix urlparse behavior when handling urls which contains scheme
596 597
  specific part only digits. Patch by Santoso Wijaya.

598 599
- collections.Counter().copy() now works correctly for subclasses.

600 601 602
- Issue #11474: Fix the bug with url2pathname() handling of '/C|/' on Windows.
  Patch by Santoso Wijaya.

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Ezio Melotti committed
603 604
- Issue #9233: Fix json.loads('{}') to return a dict (instead of a list), when
  _json is not available.
605

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606
- Issue #11830: Remove unnecessary introspection code in the decimal module.
607 608

- Issue #11703: urllib2.geturl() does not return correct url when the original
609
  url contains #fragment.
610

611 612
- Issue #10019: Fixed regression in json module where an indent of 0 stopped
  adding newlines and acted instead like 'None'.
613

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- Issue #5162: Treat services like frozen executables to allow child spawning
  from multiprocessing.forking on Windows.

617 618
- Issue #11814: Fix likely typo in multiprocessing.Pool._terminate().

619 620 621
- Issue #11747: Fix range formatting in difflib.context_diff() and
  difflib.unified_diff().

622
- Issue #8428: Fix a race condition in multiprocessing.Pool when terminating
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623 624
  worker processes: new processes would be spawned while the pool is being shut
  down.  Patch by Charles-François Natali.
625

626 627
- Issue #7311: fix html.parser to accept non-ASCII attribute values.

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628
- Issue #11605: email.parser.BytesFeedParser was incorrectly converting
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629
  multipart subparts with an 8-bit CTE into unicode instead of preserving the
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  bytes.
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632 633
- Issue #10963: Ensure that subprocess.communicate() never raises EPIPE.

634 635 636
- Issue #11746: Fix SSLContext.load_cert_chain() to accept elliptic curve
  private keys.

637 638 639
- sys.getfilesystemencoding() raises a RuntimeError if initfsencoding() was not
  called yet: detect bootstrap (startup) issues earlier.

640 641
- Issue #11618: Fix the timeout logic in threading.Lock.acquire() under Windows.

642 643 644
- Issue #11256: Fix inspect.getcallargs on functions that take only keyword
  arguments.

645 646
- Issue #11696: Fix ID generation in msilib.

647 648 649
- Issue #9696: Fix exception incorrectly raised by xdrlib.Packer.pack_int when
  trying to pack a negative (in-range) integer.

650 651 652 653
- Issue #11675: multiprocessing.[Raw]Array objects created from an integer size
  are now zeroed on creation.  This matches the behaviour specified by the
  documentation.

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Martin v. Löwis committed
654
- Issue #7639: Fix short file name generation in bdist_msi
655

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

659 660 661
- Issue #11635: Don't use polling in worker threads and processes launched by
  concurrent.futures.

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- Issue #11628: cmp_to_key generated class should use __slots__

664 665 666
- Issue #11666: let help() display named tuple attributes and methods
  that start with a leading underscore.

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667 668 669
- Issue #11662: Make urllib and urllib2 ignore redirections if the
  scheme is not HTTP, HTTPS or FTP (CVE-2011-1521).

670 671 672
- Issue #5537: Fix time2isoz() and time2netscape() functions of
  httplib.cookiejar for expiration year greater than 2038 on 32-bit systems.

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673 674 675 676
- Issue #11563: Connection:close header is sent by requests using URLOpener
  class which helps in closing of sockets after connection is over. Patch
  contributions by Jeff McNeil and Nadeem Vawda.

677 678 679
- Issue #11459: A ``bufsize`` value of 0 in subprocess.Popen() really creates
  unbuffered pipes, such that select() works properly on them.

680 681
- Issue #5421: Fix misleading error message when one of socket.sendto()'s
  arguments has the wrong type.  Patch by Nikita Vetoshkin.
682 683 684 685

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

686 687
- Issue #11577: fix ResourceWarning triggered by improved binhex test coverage

688 689 690
- Issue #11243: fix the parameter querying methods of Message to work if
  the headers contain un-encoded non-ASCII data.

691 692 693
- Issue #11401: fix handling of headers with no value; this fixes a regression
  relative to Python2 and the result is now the same as it was in Python2.

694
- Issue #9298: base64 bodies weren't being folded to line lengths less than 78,
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  which was a regression relative to Python2.  Unlike Python2, the last line of
  the folded body now ends with a carriage return.
697

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698
- Issue #11560: shutil.unpack_archive now correctly handles the format
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  parameter. Patch by Evan Dandrea.

701
- Issue #11133: fix two cases where inspect.getattr_static can trigger code
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  execution. Patch by Andreas Stührk.
703

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- Issue #11569: use absolute path to the sysctl command in multiprocessing to
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  ensure that it will be found regardless of the shell PATH. This ensures that
  multiprocessing.cpu_count works on default installs of MacOSX.
707

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

712 713 714
- Issue #11554: Fixed support for Japanese codecs; previously the body output
  encoding was not done if euc-jp or shift-jis was specified as the charset.

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715 716
- Issue #11500: Fixed a bug in the os x proxy bypass code for fully qualified IP
  addresses in the proxy exception list.
717

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- Issue #11491: dbm.error is no longer raised when dbm.open is called with the
  "n" as the flag argument and the file exists. The behavior matches the
  documentation and general logic.
721

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722 723
- Issue #11131: Fix sign of zero in decimal.Decimal plus and minus operations
  when the rounding mode is ROUND_FLOOR.
724

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

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

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- Issue #11306: mailbox in certain cases adapts to an inability to open certain
  files in read-write mode.  Previously it detected this by checking for EACCES,
  now it also checks for EROFS.
735

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736 737
- Issue #11265: asyncore now correctly handles EPIPE, EBADF and EAGAIN errors on
  accept(), send() and recv().
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- Issue #11326: Add the missing connect_ex() implementation for SSL sockets,
  and make it work for non-blocking connects.

742 743 744
- Issue #7322: Trying to read from a socket's file-like object after a timeout
  occurred now raises an error instead of silently losing data.

745 746 747
- Issue #10956: Buffered I/O classes retry reading or writing after a signal
  has arrived and the handler returned successfully.

748 749 750 751
- Issue #11224: Fixed a regression in tarfile that affected the file-like
  objects returned by TarFile.extractfile() regarding performance, memory
  consumption and failures with the stream interface.

752 753
- Issue #11074: Make 'tokenize' so it can be reloaded.

754 755 756 757
- Issue #4681: Allow mmap() to work on file sizes and offsets larger than
  4GB, even on 32-bit builds.  Initial patch by Ross Lagerwall, adapted for
  32-bit Windows.

758
- Issue #11089: Fix performance issue limiting the use of ConfigParser()
759
  with large config files.
760

761 762 763
- Issue #10276: Fix the results of zlib.crc32() and zlib.adler32() on buffers
  larger than 4GB.  Patch by Nadeem Vawda.

764 765
- Issue #9348: Raise an early error if argparse nargs and metavar don't match.

766 767
- Issue #8982: Improve the documentation for the argparse Namespace object.

768 769 770
- Issue #9343: Document that argparse parent parsers must be configured before
  their children.

771 772
- Issue #9026: Fix order of argparse sub-commands in help messages.

773 774
- Issue #9347: Fix formatting for tuples in argparse type= error messages.

775 776 777
Build
-----

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778
- Issue #11411: Fix 'make DESTDIR=' with a relative destination.
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780 781
- Issue #11268: Prevent Mac OS X Installer failure if Documentation package had
  previously been installed.
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IDLE
----

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

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

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Extension Modules
-----------------
796

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797 798
- Issue #12051: Fix segfault in json.dumps() while encoding highly-nested
  objects using the C accelerations.
799

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- Issue #12017: Fix segfault in json.loads() while decoding highly-nested
  objects using the C accelerations.
802

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803 804
- Issue #1838: Prevent segfault in ctypes, when _as_parameter_ on a class is set
  to an instance of the class.
805

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Tests
-----

809 810 811
- Issue #11873: Change regex in test_compileall to fix occasional failures when
  when the randomly generated temporary path happened to match the regex.

812 813
- Issue #10914: Add a minimal embedding test to test_capi.

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814 815
- Issue #11790: Fix sporadic failures in
  test_multiprocessing.WithProcessesTestCondition.
816

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

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- Issue #11719: Fix message about unexpected test_msilib skip on non-Windows
  platforms. Patch by Nadeem Vawda.
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- Issue #11653: fix -W with -j in regrtest.

824 825
- Issue #11577: improve test coverage of binhex.py. Patch by Arkady Koplyarov.

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- Issue #11578: added test for the timeit module.  Patch by Michael Henry.
827

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

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

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

836 837
- Issue #11554: Reactivated test_email_codecs.

838 839 840
- Issue #11490: test_subprocess:test_leaking_fds_on_error no longer gives a
  false positive if the last directory in the path is inaccessible.

841 842 843
- Issue #11223: Fix test_threadsignals to fail, not hang, when the
  non-semaphore implementation of locks is used under POSIX.

844 845 846
- Issue #10911: Add tests on CGI with non-ASCII characters. Patch written by
  Pierre Quentel.

847 848 849
- Issue #9931: Fix hangs in GUI tests under Windows in certain conditions.
  Patch by Hirokazu Yamamoto.

850 851 852
- Issue #10826: Prevent sporadic failure in test_subprocess on Solaris due
  to open door files.

853 854 855 856 857
Documentation
-------------

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

858

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

*Release date: 20-Feb-2011*

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

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

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Build
-----

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

874 875
- Issue #11184: Fix large-file support on AIX.

876 877
- Issue #941346: Fix broken shared library build on AIX.

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

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

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What's New in Python 3.2 Release Candidate 3?
=============================================
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*Release date: 13-Feb-2011*
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Core and Builtins
-----------------

892 893
- Issue #11134: Add missing fields to typeslots.h.

894 895
- Issue #11135: Remove redundant doc field from PyType_Spec.

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- Issue #11067: Add PyType_GetFlags, to support PyUnicode_Check in the limited
  ABI.
898

899 900
- Issue #11118: Fix bogus export of None in python3.dll.

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Library
-------

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904 905
- Issue #11116: any error during addition of a message to a mailbox now causes a
  rollback, instead of leaving the mailbox partially modified.
906

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- Issue #11132: Fix passing of "optimize" parameter when recursing in
  compileall.compile_dir().
909

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

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912 913
- Issue #8275: Fix passing of callback arguments with ctypes under Win64.  Patch
  by Stan Mihai.
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Build
-----

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- Issue #11079: The /Applications/Python x.x folder created by the Mac OS X
  installers now includes a link to the installed documentation and no longer
  includes an Extras directory.  The Tools directory is now installed in the
  framework under share/doc.
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- Issue #11121: Fix building with --enable-shared.

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Tests
-----

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- Issue #10971: test_zipimport_support is once again compatible with the refleak
  hunter feature of test.regrtest.
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What's New in Python 3.2 Release Candidate 2?
=============================================

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

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

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Library
-------

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

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

956 957
- Issue #11045: Protect logging call against None argument.

958 959 960
- Issue #11052: Correct IDLE menu accelerators on Mac OS X for Save
  commands.

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

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

969 970
- Issue #10989: Fix a crash on SSLContext.load_verify_locations(None, True).

971 972 973
- Issue #11020: Command-line pyclbr was broken because of missing 2-to-3
  conversion.

974 975 976
- Issue #11019: Fixed BytesGenerator so that it correctly handles a Message
  with a None body.

977 978 979 980
- Issue #11014: Make 'filter' argument in tarfile.Tarfile.add() into a
  keyword-only argument.  The preceding positional argument was deprecated,
  so it made no sense to add filter as a positional argument.

981 982
- Issue #11004: Repaired edge case in deque.count().

983 984 985
- Issue #10974: IDLE no longer crashes if its recent files list includes files
  with non-ASCII characters in their path names.

986 987 988
- Have hashlib.algorithms_available and hashlib.algorithms_guaranteed both
  return sets instead of one returning a tuple and the other a frozenset.

989 990
- Issue #10987: Fix the recursion limit handling in the _pickle module.

991 992
- Issue #10983: Fix several bugs making tunnel requests in http.client.

993
- Issue #10955: zipimport uses ASCII encoding instead of cp437 to decode
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  filenames, at bootstrap, if the codec registry is not ready yet. It is still
  possible to have non-ASCII filenames using the Unicode flag (UTF-8 encoding)
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  for all file entries in the ZIP file.
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- Issue #10949: Improved robustness of rotating file handlers.

1000 1001 1002
- Issue #10955: Fix a potential crash when trying to mmap() a file past its
  length.  Initial patch by Ross Lagerwall.

1003 1004 1005
- Issue #10898: Allow compiling the posix module when the C library defines
  a symbol named FSTAT.

1006 1007 1008 1009
- Issue #10980: the HTTP server now encodes headers with iso-8859-1 (latin1)
  encoding.  This is the preferred encoding of PEP 3333 and the base encoding
  of HTTP 1.1.

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

1015 1016
- Issue #9509: argparse now properly handles IOErrors raised by
  argparse.FileType.
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- Issue #10961: The new pydoc server now better handles exceptions raised
  during request handling.

1021 1022 1023
- Issue #10680: Fix mutually exclusive arguments for argument groups in
  argparse.

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Build
-----

- Issue #11054: Allow Mac OS X installer builds to again work on 10.5 with
  the system-provided Python.


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What's New in Python 3.2 Release Candidate 1
============================================

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*Release date: 16-Jan-2011*

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

1039
- Issue #10889: range indexing and slicing now works correctly on ranges with
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  a length that exceeds sys.maxsize.
1041

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- Issue #10892: Don't segfault when trying to delete __abstractmethods__ from a
  class.

1045
- Issue #8020: Avoid a crash where the small objects allocator would read
1046 1047
  non-Python managed memory while it is being modified by another thread.  Patch
  by Matt Bandy.
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- Issue #10841: On Windows, set the binary mode on stdin, stdout, stderr and all
  io.FileIO objects (to not translate newlines, \r\n <=> \n).  The Python parser
  translates newlines (\r\n => \n).
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- Remove buffer API from stable ABI for now, see #10181.

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- Issue #8651: PyArg_Parse*() functions raise an OverflowError if the file
  doesn't have PY_SSIZE_T_CLEAN define and the size doesn't fit in an int
  (length bigger than 2^31-1 bytes).

1059
- Issue #9015, #9611: FileIO.readinto(), FileIO.write(), os.write() and
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  stdprinter.write() clamp the length to INT_MAX on Windows.
1061

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- Issue #8278: On Windows and with a NTFS filesystem, os.stat() and os.utime()
  can now handle dates after 2038.

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- Issue #10780: PyErr_SetFromWindowsErrWithFilename() and
  PyErr_SetExcFromWindowsErrWithFilename() decode the filename from the
  filesystem encoding instead of UTF-8.

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- Issue #10779: PyErr_WarnExplicit() decodes the filename from the filesystem
  encoding instead of UTF-8.

1072 1073
- Add sys.flags attribute for the new -q command-line option.

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- Issue #11506: Trying to assign to a bytes literal should result in a
  SyntaxError.

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Library
-------

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- Issue #10916: mmap should not segfault when a file is mapped using 0 as length
  and a non-zero offset, and an attempt to read past the end of file is made
  (IndexError is raised instead).  Patch by Ross Lagerwall.
1083

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- Issue #10154, #10090: change the normalization of UTF-8 to "UTF-8" instead
  of "UTF8" in the locale module as the latter is not supported MacOSX and OpenBSD.

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- Issue #10684: shutil.move used to delete a folder on case insensitive
  filesystems when the source and destination name where the same except
  for the case.

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- Issue #10907: Warn OS X 10.6 IDLE users to use ActiveState Tcl/Tk 8.5, rather
  than the currently problematic Apple-supplied one, when running with the
  64-/32-bit installer variant.
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- Issue #4953: cgi.FieldStorage and cgi.parse() parse the request as bytes, not
  as unicode, and accept binary files. Add encoding and errors attributes to
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  cgi.FieldStorage. Patch written by Pierre Quentel (with many inputs by Glenn
  Linderman).
1099

1100
- Add encoding and errors arguments to urllib.parse_qs() and urllib.parse_qsl().
1101

1102 1103
- Issue #10899: No function type annotations in the standard library.  Removed
  function type annotations from _pyio.py.
1104

1105 1106
- Issue #10875: Update Regular Expression HOWTO; patch by 'SilentGhost'.

1107 1108 1109
- Issue #10872: The repr() of TextIOWrapper objects now includes the mode
  if available.

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- Issue #10869: Fixed bug where ast.increment_lineno modified the root node
  twice.
1112

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- Issue #5871: email.header.Header.encode now raises an error if any
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  continuation line in the formatted value has no leading white space and looks
  like a header.  Since Generator uses Header to format all headers, this check
  is made for all headers in any serialized message at serialization time.  This
  provides protection against header injection attacks.
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- Issue #10859: Make ``contextlib.GeneratorContextManager`` officially
  private by renaming it to ``_GeneratorContextManager``.

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- Issue #10042: Fixed the total_ordering decorator to handle cross-type
  comparisons that could lead to infinite recursion.

1125
- Issue #10686: the email package now :rfc:`2047`\ -encodes headers with
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  non-ASCII bytes (parsed by a BytesParser) when doing conversion to 7bit-clean
1127
  presentation, instead of replacing them with ?s.
1128

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- email.header.Header was incorrectly encoding folding whitespace when
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  rfc2047-encoding header values with embedded newlines, leaving them without
  folding whitespace.  It now uses the continuation_ws, as it does for
  continuation lines that it creates itself.
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- Issue #1777412, #10827: Changed the rules for 2-digit years. The
  time.asctime(), time.ctime() and time.strftime() functions will now format
  any year when ``time.accept2dyear`` is False and will accept years >= 1000
  otherwise. ``time.mktime`` and ``time.strftime`` now accept full range
  supported by the OS. With Visual Studio or on Solaris, the year is limited to
  the range [1; 9999]. Conversion of 2-digit years to 4-digit is deprecated.
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- Issue #7858: Raise an error properly when os.utime() fails under Windows
  on an existing file.

1144 1145 1146
- Issue #3839: wsgiref should not override a Content-Length header set by
  the application.  Initial patch by Clovis Fabricio.

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- Issue #10492: bdb.Bdb.run() only traces the execution of the code, not the
  compilation (if the input is a string).

1150
- Issue #7995: When calling accept() on a socket with a timeout, the returned
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  socket is now always blocking, regardless of the operating system.
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- Issue #10756: atexit normalizes the exception before displaying it. Patch by
  Andreas Stührk.
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- Issue #10790: email.header.Header.append's charset logic now works correctly
  for charsets whose output codec is different from its input codec.

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- Issue #10819: SocketIO.name property returns -1 when its closed, instead of
  raising a ValueError, to fix repr().

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- Issue #8650: zlib.compress() and zlib.decompress() raise an OverflowError if
  the input buffer length doesn't fit into an unsigned int (length bigger than
  2^32-1 bytes).

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- Issue #6643: Reinitialize locks held within the threading module after fork to
  avoid a potential rare deadlock or crash on some platforms.
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- Issue #10806, issue #9905: Fix subprocess pipes when some of the standard file
  descriptors (0, 1, 2) are closed in the parent process.  Initial patch by Ross
  Lagerwall.
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- `unittest.TestCase` can be instantiated without a method name; for simpler
  exploration from the interactive interpreter.

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- Issue #10798: Reject supporting concurrent.futures if the system has too
  few POSIX semaphores.

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- Issue #10807: Remove base64, bz2, hex, quopri, rot13, uu and zlib codecs from
  the codec aliases. They are still accessible via codecs.lookup().

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- Issue #10801: In zipfile, support different encodings for the header and the
  filenames.
1184

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- Issue #6285: IDLE no longer crashes on missing help file; patch by Scott
  David Daniels.
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- Fix collections.OrderedDict.setdefault() so that it works in subclasses that
  define __missing__().
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- Issue #10786: unittest.TextTestRunner default stream no longer bound at import
  time. `sys.stderr` now looked up at instantiation time.  Fix contributed by
  Mark Roddy.
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- Issue #10753: Characters ';', '=' and ',' in the PATH_INFO environment variable
  won't be quoted when the URI is constructed by the wsgiref.util's request_uri
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  method. According to RFC 3986, these characters can be a part of params in
  PATH component of URI and need not be quoted.
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- Issue #10738: Fix webbrowser.Opera.raise_opts.
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- Issue #9824: SimpleCookie now encodes , and ; in values to cater to how
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  browsers actually parse cookies.

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- Issue #9333: os.symlink now available regardless of user privileges.  The
  function now raises OSError on Windows >=6.0 when the user is unable to create
  symbolic links. XP and 2003 still raise NotImplementedError.
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- Issue #10783: struct.pack() no longer implicitly encodes unicode to UTF-8.
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- Issue #10730: Add SVG mime types to mimetypes module.

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- Issue #10768: Make the Tkinter ScrolledText widget work again.

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- Issue #10777: Fix "dictionary changed size during iteration" bug in
  ElementTree register_namespace().

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- Issue #10626: test_logging now preserves logger disabled states.

- Issue #10774: test_logging now removes temp files created during tests.

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- Issue #5258/#10642: if site.py encounters a .pth file that generates an error,
  it now prints the filename, line number, and traceback to stderr and skips
  the rest of that individual file, instead of stopping processing entirely.

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- Issue #10763: subprocess.communicate() closes stdout and stderr if both are
  pipes (bug specific to Windows).

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- Issue #1693546: fix email.message RFC 2231 parameter encoding to be in better
  compliance (no "s around encoded values).

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- Improved the diff message in the unittest module's assertCountEqual().

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- Issue #1155362: email.utils.parsedate_tz now handles a missing space before
  the '-' of a timezone field as well as before a '+'.

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- Issue #4871: The zipfile module now gives a more useful error message if
  an attempt is made to use a string to specify the archive password.

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- Issue #10750: The ``raw`` attribute of buffered IO objects is now read-only.

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- Deprecated assertDictContainsSubset() in the unittest module.
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C-API
-----

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- Issue #10913: Deprecate misleading functions PyEval_AcquireLock() and
  PyEval_ReleaseLock().  The thread-state aware APIs should be used instead.

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- Issue #10333: Remove ancient GC API, which has been deprecated since Python
  2.2.
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Build
-----

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- Issue #10843: Update third-party library versions used in OS X 32-bit
  installer builds: bzip2 1.0.6, readline 6.1.2, SQLite 3.7.4 (with FTS3/FTS4
  and RTREE enabled), and ncursesw 5.5 (wide-char support enabled).
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- Issue #10820: Fix OS X framework installs to support version-specific
  scripts (#10679).

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- Issue #7716: Under Solaris, don't assume existence of /usr/xpg4/bin/grep in
  the configure script but use $GREP instead.  Patch by Fabian Groffen.

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- Issue #10475: Don't hardcode compilers for LDSHARED/LDCXXSHARED on NetBSD
  and DragonFly BSD.  Patch by Nicolas Joly.

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- Issue #10679: The "idle", "pydoc" and "2to3" scripts are now installed with
  a version-specific suffix on "make altinstall".

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- Issue #10655: Fix the build on PowerPC on Linux with GCC when building with
  timestamp profiling (--with-tsc): the preprocessor test for the PowerPC
  support now looks for "__powerpc__" as well as "__ppc__": the latter seems to
  only be present on OS X; the former is the correct one for Linux with GCC.

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- Issue #1099: Fix the build on MacOSX when building a framework with pydebug
  using GCC 4.0.

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

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- Issue #10843: Install the Tools directory on OS X in the applications Extras
  (/Applications/Python 3.n/Extras/) where the Demo directory had previous been
  installed.
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- Issue #7962: The Demo directory is gone.  Most of the old and unmaintained
  demos have been removed, others integrated in documentation or a new
  Tools/demo subdirectory.

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- Issue #10502: Addition of the unittestgui tool. Originally by Steve Purcell.
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  Updated for test discovery by Mark Roddy and Python 3 compatibility by Brian
  Curtin.
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Tests
-----

1298 1299
- Fix test_startfile to wait for child process to terminate before finishing.

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- Issue #10822: Fix test_posix:test_getgroups failure under Solaris.  Patch
  by Ross Lagerwall.

1303 1304
- Make the --coverage flag work for test.regrtest.

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- Issue #1677694: Refactor and improve test_timeout.  Original patch by
  Björn Lindqvist.

1308 1309 1310
- Issue #5485: Add tests for the UseForeignDTD method of expat parser objects.
  Patch by Jean-Paul Calderone and Sandro Tosi.

1311 1312 1313
- Issue #6293: Have regrtest.py echo back sys.flags.  This is done by default in
  whole runs and enabled selectively using ``--header`` when running an explicit
  list of tests.  Original patch by Collin Winter.
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What's New in Python 3.2 Beta 2?
================================

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*Release date: 19-Dec-2010*
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Core and Builtins
-----------------

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

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- Issue #4236: PyModule_Create2 now checks the import machinery directly
  rather than the Py_IsInitialized flag, avoiding a Fatal Python
  error in certain circumstances when an import is done in __del__.
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- Issue #5587: add a repr to dict_proxy objects.  Patch by David Stanek and
  Daniel Urban.

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Library
-------
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- Issue #3243:  Support iterable bodies in httplib. Patch Contributions by
  Xuanji Li and Chris AtLee.

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- Issue #10611: SystemExit exception will no longer kill a unittest run.

- Issue #9857: It is now possible to skip a test in a setUp, tearDown or clean
  up function.

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

1348 1349 1350
- Issue #9286: email.utils.parseaddr no longer concatenates blank-separated
  words in the local part of email addresses, thereby preserving the input.

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

1354 1355 1356
- Issue #10404: Use ctl-button-1 on OSX for the context menu in Idle.

- Issue #9907: Fix tab handling on OSX when using editline by calling
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  rl_initialize first, then setting our custom defaults, then reading .editrc.

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

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

1365 1366
- Issue #9721: Fix the behavior of urljoin when the relative url starts with a
  ';' character. Patch by Wes Chow.
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- Issue #10714: Limit length of incoming request in http.server to 65536 bytes
  for security reasons.  Initial patch by Ross Lagerwall.

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

1373 1374
- Issue #10667: Fast path for collections.Counter().

1375 1376 1377
- Issue #10695: passing the port as a string value to telnetlib no longer
  causes debug mode to fail.

1378 1379 1380
- Issue #1078919: add_header now automatically RFC2231 encodes parameters
  that contain non-ascii values.

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- Issue #10188 (partial resolution): tempfile.TemporaryDirectory emits
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  a warning on sys.stderr rather than throwing a misleading exception
  if cleanup fails due to nulling out of modules during shutdown.
  Also avoids an AttributeError when mkdtemp call fails and issues
  a ResourceWarning on implicit cleanup via __del__.

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

- Issue #7213: subprocess.Popen's default for close_fds has been changed.
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  It is now True in most cases other than on Windows when input, output or
  error handles are provided.

- Issue #6559: subprocess.Popen has a new pass_fds parameter (actually
  added in 3.2beta1) to allow specifying a specific list of file descriptors
  to keep open in the child process.
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- Issue #1731717: Fixed the problem where subprocess.wait() could cause an
  OSError exception when The OS had been told to ignore SIGCLD in our process
  or otherwise not wait for exiting child processes.

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Tests
-----

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

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

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

1413 1414
- Issue #10710: ``Misc/setuid-prog.c`` is removed from the source tree.

1415 1416 1417
- Issue #10706: Remove outdated script runtests.sh.  Either ``make test``
  or ``python -m test`` should be used instead.

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Build
-----

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- The Windows build now uses Tcl/Tk 8.5.9 and sqlite3 3.7.4.
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1423 1424
- Issue #9234: argparse supports alias names for subparsers.

1425

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

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

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1437 1438
- Issue #10596: Fix float.__mod__ to have the same behaviour as float.__divmod__
  with respect to signed zeros.  -4.0 % 4.0 should be 0.0, not -0.0.
1439

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

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- Fixed several corner case issues on Windows in os.stat/os.lstat related to
  reparse points.
1447

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- PEP 384 (Defining a Stable ABI) is implemented.

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

1454 1455
- Issue #8685: Speed up set difference ``a - b`` when source set ``a`` is much
  larger than operand ``b``.  Patch by Andrew Bennetts.
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- Issue #10518: Bring back the callable() builtin.

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- Issue #7094: Added alternate formatting (specified by '#') to ``__format__``
  method of float, complex, and Decimal. This allows more precise control over
  when decimal points are displayed.
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- Issue #10474: range.count() should return integers.
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- Issue #1574217: isinstance now catches only AttributeError, rather than
  masking all errors.

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

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

1476 1477
- Issue #4391: Use proper plural forms in argparse.

1478 1479 1480
- Issue #10601: sys.displayhook uses 'backslashreplace' error handler on
  UnicodeEncodeError.

1481 1482
- Add the "display" and "undisplay" pdb commands.

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1483 1484
- Issue #7245: Add a SIGINT handler in pdb that allows to break a program again
  after a "continue" command.
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- Add the "interact" pdb command.

1488 1489
- Issue #7905: Actually respect the keyencoding parameter to shelve.Shelf.

1490 1491
- Issue #1569291: Speed up array.repeat().

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

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- Issue #7904: Changes to urllib.parse.urlsplit to handle schemes as defined by
  RFC3986. Anything before :// is considered a scheme and is followed by an
  authority (or netloc) and by '/' led path, which is optional.

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

- Issue #10620: `python -m unittest` can accept file paths instead of module
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  names for running specific tests.

- Issue #9424: Deprecate the `unittest.TestCase` methods `assertEquals`,
  `assertNotEquals`, `assertAlmostEquals`, `assertNotAlmostEquals` and `assert_`
  and replace them with the correct methods in the Python test suite.

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

1511 1512 1513
- Issue #10528: Allow translators to reorder placeholders in localizable
  messages from argparse.

1514 1515
- Issue #10497: Fix incorrect use of gettext in argparse.

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- Issue #10478: Reentrant calls inside buffered IO objects (for example by
  way of a signal handler) now raise a RuntimeError instead of freezing the
  current process.

1520 1521
- logging: Added getLogRecordFactory/setLogRecordFactory with docs and tests.

1522 1523
- Issue #10549: Fix pydoc traceback when text-documenting certain classes.

1524 1525 1526
- Issue #2001: New HTML server with enhanced Web page features.  Patch by Ron
  Adam.

1527 1528
- Issue #10360: In WeakSet, do not raise TypeErrors when testing for membership
  of non-weakrefable objects.
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1530 1531
- Issue #940286: pydoc.Helper.help() ignores input/output init parameters.

1532 1533
- Issue #1745035: Add a command size and data size limit to smtpd.py, to prevent
  DoS attacks.  Patch by Savio Sena.
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- Issue #4925: Add filename to error message when executable can't be found in
  subprocess.

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

1541 1542
- Issue #10027: st_nlink was not being set on Windows calls to os.stat or
  os.lstat. Patch by Hirokazu Yamamoto.
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1544 1545
- Issue #9333: Expose os.symlink only when the SeCreateSymbolicLinkPrivilege is
  held by the user's account, i.e., when the function can actually be used.
1546 1547

- Issue #8879: Add os.link support for Windows.
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- Issue #7911: ``unittest.TestCase.longMessage`` defaults to True for improved
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  failure messages by default. Patch by Mark Roddy.
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- Issue #1486713: HTMLParser now has an optional tolerant mode where it tries to
  guess at the correct parsing of invalid html.
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- Issue #10554: Add context manager support to subprocess.Popen objects.

1557 1558 1559
- Issue #8989: email.utils.make_msgid now has a domain parameter that can
  override the domain name used in the generated msgid.

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- Issue #9299: Add exist_ok parameter to os.makedirs to suppress the 'File
  exists' exception when a target directory already exists with the specified
  mode. Patch by Ray Allen.
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- Issue #9573: os.fork() now works correctly when triggered as a side effect of
  a module import.
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- Issue #10464: netrc now correctly handles lines with embedded '#' characters.

1569 1570
- Added itertools.accumulate().

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

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

1577 1578
- Issue #10535: Enable silenced warnings in unittest by default.

1579 1580
- Issue #9873: The URL parsing functions in urllib.parse now accept ASCII byte
  sequences as input in addition to character strings.
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- Issue #10586: The statistics API for the new functools.lru_cache has been
  changed to a single cache_info() method returning a named tuple.
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- Issue #10323: itertools.islice() now consumes the minimum number of inputs
  before stopping.  Formerly, the final state of the underlying iterator was
  undefined.
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- Issue #10565: The collections.Iterator ABC now checks for both __iter__ and
  __next__.
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1592 1593
- Issue #10242: Fixed implementation of unittest.ItemsEqual and gave it a new
  more informative name, unittest.CountEqual.
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- Issue #10561: In pdb, clear the breakpoints by the breakpoint number.

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

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- Issue #10534: in difflib, expose bjunk and bpopular sets; deprecate
  undocumented and now redundant isbjunk and isbpopular methods.
1603

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1604 1605
- Issue #9846: zipfile is now correctly closing underlying file objects.

1606 1607
- Issue #10459: Update CJK character names to Unicode 6.0.

1608
- Issue #4493: urllib.request adds '/' in front of path components which does not
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  start with '/. Common behavior exhibited by browsers and other clients.

1611 1612 1613
- Issue #6378: idle.bat now runs with the appropriate Python version rather than
  the system default. Patch by Sridhar Ratnakumar.

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

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- Issue #3709: BaseHTTPRequestHandler will buffer the headers and write to
  output stream only when end_headers is invoked. This is a speedup and an
  internal optimization.  Patch by endian.

1621 1622
- Issue #10220: Added inspect.getgeneratorstate. Initial patch by Rodolpho
  Eckhardt.
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1624 1625 1626
- Issue #10453: compileall now uses argparse instead of getopt, and thus
  provides clean output when called with '-h'.

1627 1628
- Issue #8078: Add constants for higher baud rates in the termios module.  Patch
  by Rodolpho Eckhardt.
1629

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- Issue #10407: Fix two NameErrors in distutils.

1632
- Issue #10371: Deprecated undocumented functions in the trace module.
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- Issue #10467: Fix BytesIO.readinto() after seeking into a position after the
  end of the file.

1637 1638
- configparser: 100% test coverage.

1639 1640
- Issue #10499: configparser supports pluggable interpolation handlers. The
  default classic interpolation handler is called BasicInterpolation. Another
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  interpolation handler added (ExtendedInterpolation) which supports the syntax
  used by zc.buildout (e.g. interpolation between sections).

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- configparser: the SafeConfigParser class has been renamed to ConfigParser.
  The legacy ConfigParser class has been removed but its interpolation mechanism
  is still available as LegacyInterpolation.
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- configparser: Usage of RawConfigParser is now discouraged for new projects
  in favor of ConfigParser(interpolation=None).

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- Issue #1682942: configparser supports alternative option/value delimiters.

- Issue #5412: configparser supports mapping protocol access.

- Issue #9411: configparser supports specifying encoding for read operations.

- Issue #9421: configparser's getint(), getfloat() and getboolean() methods
  accept vars and default arguments just like get() does.

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- Issue #9452: configparser supports reading from strings and dictionaries
  (thanks to the mapping protocol API, the latter can be used to copy data
  between parsers).
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- configparser: accepted INI file structure is now customizable, including
  comment prefixes, name of the DEFAULT section, empty lines in multiline
  values, and indentation.

1668
- Issue #10326: unittest.TestCase instances can be pickled.
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1670
- Issue #9926: Wrapped TestSuite subclass does not get __call__ executed.
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- Issue #9920: Skip tests for cmath.atan and cmath.atanh applied to complex
  zeros on systems where the log1p function fails to respect the sign of zero.
  This fixes a test failure on AIX.
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- Issue #9732: Addition of getattr_static to the inspect module.

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

1681 1682
- Make the 'No module named' exception message from importlib consistent.

1683 1684
- Issue #10443: Add the SSLContext.set_default_verify_paths() method.

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

1688 1689
- Issue #10429: IMAP.starttls() stored the capabilities as bytes objects, rather
  than strings.
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C-API
-----

1694
- Issue #10557: Added a new API function, PyUnicode_TransformDecimalToASCII(),
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  which transforms non-ASCII decimal digits in a Unicode string to their ASCII
  equivalents.
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- Issue #9518: Extend the PyModuleDef_HEAD_INIT macro to explicitly
  zero-initialize all fields, fixing compiler warnings seen when building
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  extension modules with gcc with "-Wmissing-field-initializers" (implied by
  "-W").
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- Issue #10255: Fix reference leak in Py_InitializeEx().  Patch by Neil
  Schemenauer.

1706 1707
- structseq.h is now included in Python.h.

1708 1709
- Loosen PyArg_ValidateKeywordArguments to allow dict subclasses.

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Tests
-----

1713
- regrtest.py once again ensures the test directory is removed from sys.path
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  when it is invoked directly as the __main__ module.
1715

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- `python -m test` can be used to run the test suite as well as `python -m
  test.regrtest`.
1718

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- Do not fail test_socket when the IP address of the local hostname cannot be
  looked up.
1721

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- Issue #8886: Use context managers throughout test_zipfile. Patch by Eric
  Carstensen.
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Build
-----

- Issue #10325: Fix two issues in the fallback definitions for PY_ULLONG_MAX and
  PY_LLONG_MAX that made them unsuitable for use in preprocessor conditionals.

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

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

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

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- Issue #10372: Import the warnings module only after the IO library is
  initialized, so as to avoid bootstrap issues with the '-W' option.

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1748 1749
- Issue #10293: Remove obsolete field in the PyMemoryView structure, unused
  undocumented value PyBUF_SHADOW, and strangely-looking code in
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  PyMemoryView_GetContiguous.

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1752
- Issue #6081: Add str.format_map(), similar to ``str.format(**mapping)``.
1753

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- If FileIO.__init__ fails, close the file descriptor.

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- Issue #10221: dict.pop(k) now has a key error message that includes the
  missing key (same message d[k] returns for missing keys).

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1759
- Issue #5437: A preallocated MemoryError instance should not keep traceback
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  data (including local variables caught in the stack trace) alive infinitely.

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

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1765 1766
- Issue #10089: Add support for arbitrary -X options on the command line.  They
  can be retrieved through a new attribute ``sys._xoptions``.
1767

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1768 1769
- Issue #4388: On Mac OS X, decode command line arguments from UTF-8, instead of
  the locale encoding.  If the LANG (and LC_ALL and LC_CTYPE) environment
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  variable is not set, the locale encoding is ISO-8859-1, whereas most programs
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  (including Python) expect UTF-8.  Python already uses UTF-8 for the filesystem
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  encoding and to encode command line arguments on this OS.

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

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

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

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

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

1793 1794
- Issue #9992: Remove PYTHONFSENCODING environment variable.

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Library
-------
1797

1798 1799
- Issue #10465: fix broken delegating of attributes by gzip._PaddedFile.

1800 1801
- Issue #10356: Decimal.__hash__(-1) should return -2.

1802 1803
- Issue #1553375: logging: Added stack_info kwarg to display stack information.

1804 1805
- Issue #5111: IPv6 Host in the Header is wrapped inside [ ]. Patch by Chandru.

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1806 1807
- Fix Fraction.__hash__ so that Fraction.__hash__(-1) is -2.  (See also issue
  #10356.)
1808

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1809 1810
- Issue #4471: Add the IMAP.starttls() method to enable encryption on standard
  IMAP4 connections.  Original patch by Lorenzo M. Catucci.
1811

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1812 1813
- Issue #1466065: Add 'validate' option to base64.b64decode to raise an error if
  there are non-base64 alphabet characters in the input.
1814

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- Issue #10386: Add __all__ to token module; this simplifies importing in
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  tokenize module and prevents leaking of private names through ``import *``.
1817

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1818 1819
- Issue #4471: Properly shutdown socket in IMAP.shutdown().  Patch by Lorenzo
  M. Catucci.
1820

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- Fix IMAP.login() to work properly.

1823
- Issue #9244: multiprocessing pool worker processes could terminate
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  unexpectedly if the return value of a task could not be pickled.  Only the
  ``repr`` of such errors are now sent back, wrapped in an
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  ``MaybeEncodingError`` exception.

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- Issue #9244: The ``apply_async()`` and ``map_async()`` methods of
  ``multiprocessing.Pool`` now accepts a ``error_callback`` argument.  This can
  be a callback with the signature ``callback(exc)``, which will be called if
  the target raises an exception.
1832

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

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- Issue #1926: Add support for NNTP over SSL on port 563, as well as STARTTLS.
  Patch by Andrew Vant.
1840

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- Issue #10335: Add tokenize.open(), detect the file encoding using
  tokenize.detect_encoding() and open it in read only mode.
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- Issue #10321: Add support for binary data to smtplib.SMTP.sendmail, and a new
  method send_message to send an email.message.Message object.
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- Issue #6011: sysconfig and distutils.sysconfig use the surrogateescape error
  handler to parse the Makefile file.  Avoid a UnicodeDecodeError if the source
  code directory name contains a non-ASCII character and the locale encoding is
  ASCII.

1852
- Issue #10329: The trace module writes reports using the input Python script
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  encoding, instead of the locale encoding.  Patch written by Alexander
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  Belopolsky.

1856 1857 1858
- Issue #10126: Fix distutils' test_build when Python was built with
  --enable-shared.

1859 1860 1861
- Issue #9281: Prevent race condition with mkdir in distutils.  Patch by
  Arfrever.

1862 1863
- Issue #10229: Fix caching error in gettext.

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

1867 1868 1869
- Issue #10180: Pickling file objects is now explicitly forbidden, since
  unpickling them produced nonsensical results.

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1870 1871
- Issue #10311: The signal module now restores errno before returning from its
  low-level signal handler.  Patch by Hallvard B Furuseth.
1872

1873 1874
- Issue #10282: Add a ``nntp_implementation`` attribute to NNTP objects.

1875 1876
- Issue #10283: Add a ``group_pattern`` argument to NNTP.list().

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

1883 1884
- wsgiref now implements and validates PEP 3333, rather than an experimental
  extension of PEP 333.  (Note: earlier versions of Python 3.x may have
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  incorrectly validated some non-compliant applications as WSGI compliant; if
  your app validates with Python <3.2b1+, but not on this version, it is likely
  the case that your app was not compliant.)
1888

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1889 1890
- Issue #10280: NNTP.nntp_version should reflect the highest version advertised
  by the server.
1891

1892 1893
- Issue #10184: Touch directories only once when extracting a tarfile.

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1894 1895
- Issue #10199: New package, ``turtledemo`` now contains selected demo scripts
  that were formerly found under Demo/turtle.
1896

1897 1898
- Issue #10265: Close file objects explicitly in sunau.  Patch by Brian Brazil.

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1899 1900
- Issue #10266: uu.decode didn't close in_file explicitly when it was given as a
  filename.  Patch by Brian Brazil.
1901

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1902 1903
- Issue #10110: Queue objects didn't recognize full queues when the maxsize
  parameter had been reduced.
1904

1905 1906
- Issue #10160: Speed up operator.attrgetter.  Patch by Christos Georgiou.

1907 1908
- logging: Added style option to basicConfig() to allow %, {} or $-formatting.

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1909 1910
- Issue #5729: json.dumps() now supports using a string such as '\t' for
  pretty-printing multilevel objects.
1911

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1912 1913
- Issue #10253: FileIO leaks a file descriptor when trying to open a file for
  append that isn't seekable.  Patch by Brian Brazil.
1914

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1915 1916
- Support context manager protocol for file-like objects returned by mailbox
  ``get_file()`` methods.
1917

1918 1919 1920
- Issue #10246: uu.encode didn't close file objects explicitly when filenames
  were given to it.  Patch by Brian Brazil.

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1921 1922
- Issue #10198: fix duplicate header written to wave files when writeframes() is
  called without data.
1923

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- Close file objects in modulefinder in a timely manner.

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- Close a io.TextIOWrapper object in email.parser in a timely manner.

- Close a file object in distutils.sysconfig in a timely manner.

- Close a file object in pkgutil in a timely manner.

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1932 1933
- Issue #10233: Close file objects in a timely manner in the tarfile module and
  its test suite.
1934

1935
- Issue #10093: ResourceWarnings are now issued when files and sockets are
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1936 1937
  deallocated without explicit closing.  These warnings are silenced by default,
  except in pydebug mode.
1938

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1939 1940
- tarfile.py: Add support for all missing variants of the GNU sparse extensions
  and create files with holes when extracting sparse members.
1941

1942 1943
- Issue #10218: Return timeout status from ``Condition.wait`` in threading.

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1944 1945
- Issue #7351: Add ``zipfile.BadZipFile`` spelling of the exception name and
  deprecate the old name ``zipfile.BadZipfile``.
1946

1947 1948 1949 1950
- Issue #5027: The standard ``xml`` namespace is now understood by
  xml.sax.saxutils.XMLGenerator as being bound to
  http://www.w3.org/XML/1998/namespace.  Patch by Troy J. Farrell.

1951 1952 1953
- Issue #5975: Add csv.unix_dialect class.

- Issue #7761: telnetlib.interact failures on Windows fixed.
1954

1955 1956
- logging: Added style option to Formatter to allow %, {} or $-formatting.

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1957 1958
- Issue #5178: Added tempfile.TemporaryDirectory class that can be used as a
  context manager.
1959

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- Issue #1349106: Generator (and BytesGenerator) flatten method and Header
  encode method now support a 'linesep' argument.

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- Issue #5639: Add a *server_hostname* argument to ``SSLContext.wrap_socket`` in
  order to support the TLS SNI extension.  ``HTTPSConnection`` and ``urlopen()``
  also use this argument, so that HTTPS virtual hosts are now supported.
1966

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

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1969
- Issue #10163: Skip unreadable registry keys during mimetypes initialization.
1970

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- logging: Made StreamHandler terminator configurable.

1973 1974
- logging: Allowed filters to be just callables.

1975 1976
- logging: Added tests for _logRecordClass changes.

1977 1978
- Issue #10092: Properly reset locale in calendar.Locale*Calendar classes.

1979 1980 1981
- logging: Added _logRecordClass, getLogRecordClass, setLogRecordClass to
  increase flexibility of LogRecord creation.

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1982 1983 1984
- Issue #5117: Case normalization was needed on ntpath.relpath().  Also fixed
  root directory issue on posixpath.relpath().  (Ported working fixes from
  ntpath.)
1985

1986 1987 1988
- Issue #1343: xml.sax.saxutils.XMLGenerator now has an option
  short_empty_elements to direct it to use self-closing tags when appropriate.

1989 1990 1991
- Issue #9807 (part 1): Expose the ABI flags in sys.abiflags.  Add --abiflags
  switch to python-config for command line access.

1992 1993
- Issue #6098: Don't claim DOM level 3 conformance in minidom.

1994 1995 1996
- Issue #5762: Fix AttributeError raised by ``xml.dom.minidom`` when an empty
  XML namespace attribute is encountered.

1997
- Issue #2830: Add the ``html.escape()`` function, which quotes all problematic
1998
  characters by default.  Deprecate ``cgi.escape()``.
1999

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2000
- Issue #9409: Fix the regex to match all kind of filenames, for interactive
2001 2002
  debugging in doctests.

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2003 2004
- Issue #9183: ``datetime.timezone(datetime.timedelta(0))`` will now return the
  same instance as ``datetime.timezone.utc``.
2005

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2006 2007
- Issue #7523: Add SOCK_CLOEXEC and SOCK_NONBLOCK to the socket module, where
  supported by the system.  Patch by Nikita Vetoshkin.
2008 2009

- Issue #10063: file:// scheme will stop accessing remote hosts via ftp
2010
  protocol. file:// urls had fallback to access remote hosts via ftp. This was
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2011 2012
  not correct, change is made to raise a URLError when a remote host is tried to
  access via file:// scheme.
2013

2014 2015 2016 2017
- Issue #1710703: Write structures for an empty ZIP archive when a ZipFile is
  created in modes 'a' or 'w' and then closed without adding any files. Raise
  BadZipfile (rather than IOError) when opening small non-ZIP files.

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2018 2019 2020
- Issue #10041: The signature of optional arguments in socket.makefile() didn't
  match that of io.open(), and they also didn't get forwarded properly to
  TextIOWrapper in text mode.  Patch by Kai Zhu.
2021

2022
- Issue #9003: http.client.HTTPSConnection, urllib.request.HTTPSHandler and
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  urllib.request.urlopen now take optional arguments to allow for server
  certificate checking, as recommended in public uses of HTTPS.
2025

2026 2027 2028
- Issue #6612: Fix site and sysconfig to catch os.getcwd() error, eg. if the
  current directory was deleted. Patch written by W. Trevor King.

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2029
- Issue #3873: Speed up unpickling from file objects that have a peek() method.
2030

2031 2032
- Issue #10075: Add a session_stats() method to SSLContext objects.

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2033 2034
- Issue #9948: Fixed problem of losing filename case information.

2035 2036
Extension Modules
-----------------
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2038 2039 2040
- Issue #5109: array.array constructor will now use fast code when
  initial data is provided in an array object with correct type.

2041 2042
- Issue #6317: Now winsound.PlaySound only accepts unicode.

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

2045 2046
- Issue #9377: Use Unicode API for gethostname on Windows.

2047 2048
- Issue #10143: Update "os.pathconf" values.

2049 2050
- Issue #6518: Support context manager protcol for ossaudiodev types.

2051 2052
- Issue #678250: Make mmap flush a noop on ACCESS_READ and ACCESS_COPY.

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2053 2054
- Issue #9054: Fix a crash occurring when using the pyexpat module with expat
  version 2.0.1.
2055

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2056 2057 2058
- Issue #5355: Provide mappings from Expat error numbers to string descriptions
  and backwards, in order to actually make it possible to analyze error codes
  provided by ExpatError.
2059

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- The Unicode database was updated to 6.0.0.

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C-API
-----

2065
- Issue #10288: The deprecated family of "char"-handling macros
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  (ISLOWER()/ISUPPER()/etc) have now been removed: use Py_ISLOWER() etc instead.
2067

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

2071 2072 2073
Tools/Demos
-----------

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2074 2075 2076
- Issue #10117: Tools/scripts/reindent.py now accepts source files that use
  encoding other than ASCII or UTF-8.  Source encoding is preserved when
  reindented code is written to a file.
2077

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

2080 2081 2082
Tests
-----

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2083 2084
- Issue #3699: Fix test_bigaddrspace and extend it to test bytestrings as well
  as unicode strings.  Initial patch by Sandro Tosi.
2085

2086 2087
- Issue #10294: Remove dead code form test_unicode_file.

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2088 2089
- Issue #10123: Don't use non-ascii filenames in test_doctest tests. Add a new
  test specific to unicode (non-ascii name and filename).
2090

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Build
-----

2094 2095
- Issue #10268: Add a --enable-loadable-sqlite-extensions option to configure.

2096 2097
- Issue #8852: Allow the socket module to build on OpenSolaris.

2098 2099
- Drop -OPT:Olimit compiler option.

2100 2101
- Issue #10094: Use versioned .so files on GNU/kfreeBSD and the GNU Hurd.

2102 2103
- Accept Oracle Berkeley DB 5.0 and 5.1 as backend for the dbm extension.

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- Issue #7473: avoid link errors when building a framework with a different set
  of architectures than the one that is currently installed.
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What's New in Python 3.2 Alpha 3?
=================================

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*Release date: 09-Oct-2010*
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Core and Builtins
-----------------

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

2119
- Issue #9738: Document PyErr_SetString() and PyErr_SetFromErrnoWithFilename()
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  encodings.
2121

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- ast.literal_eval() can now handle negative numbers.  It is also a little more
  liberal in what it accepts without compromising the safety of the evaluation.
  For example, 3j+4 and 3+4+5 are both accepted.
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- Issue #10006: type.__abstractmethods__ now raises an AttributeError.  As a
  result metaclasses can now be ABCs (see #9533).

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- Issue #8670: ctypes.c_wchar supports non-BMP characters with 32 bits wchar_t.

2131
- Issue #8670: PyUnicode_AsWideChar() and PyUnicode_AsWideCharString() replace
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  UTF-16 surrogate pairs by single non-BMP characters for 16 bits Py_UNICODE and
  32 bits wchar_t (eg. Linux in narrow build).
2134

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- Issue #10003: Allow handling of SIGBREAK on Windows. Fixes a regression
2136
  introduced by issue #9324.
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- Issue #9979: Create function PyUnicode_AsWideCharString().

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

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- Issue #8521: Allow CreateKeyEx, OpenKeyEx, and DeleteKeyEx functions of winreg
  to use named arguments.
2145

2146
- Issue #9930: Remove bogus subtype check that was causing (e.g.)
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  float.__rdiv__(2.0, 3) to return NotImplemented instead of the expected 1.5.
2148

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- Issue #9808: Implement os.getlogin for Windows. Patch by Jon Anglin.

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- Issue #9901: Destroying the GIL in Py_Finalize() can fail if some other
  threads are still running.  Instead, reinitialize the GIL on a second call to
  Py_Initialize().

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- All SyntaxErrors now have a column offset and therefore a caret when the error
  is printed.
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- Issue #9252: PyImport_Import no longer uses a fromlist hack to return the
  module that was imported, but instead gets the module from sys.modules.

2161
- Issue #9213: The range type_items now provides index() and count() methods, to
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  conform to the Sequence ABC.  Patch by Daniel Urban and Daniel Stutzbach.
2163

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- Issue #7994: Issue a PendingDeprecationWarning if object.__format__ is called
  with a non-empty format string.  This is an effort to future-proof user
  code. If a derived class does not currently implement __format__ but later
  adds its own __format__, it would most likely break user code that had
  supplied a format string.  This will be changed to a DeprecationWaring in
  Python 3.3 and it will be an error in Python 3.4.
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- Issue #9828: Destroy the GIL in Py_Finalize(), so that it gets properly
  re-created on a subsequent call to Py_Initialize().  The problem (a crash)
  wouldn't appear in 3.1 or 2.7 where the GIL's structure is more trivial.

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- Issue #9210: Configure option --with-wctype-functions was removed.  Using the
  functions from the libc caused the methods .upper() and lower() to become
  locale aware and created subtly wrong results.

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- Issue #9738: PyUnicode_FromFormat() and PyErr_Format() raise an error on a
  non-ASCII byte in the format string.
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- Issue #4617: Previously it was illegal to delete a name from the local
  namespace if it occurs as a free variable in a nested block.  This limitation
  of the compiler has been lifted, and a new opcode introduced (DELETE_DEREF).

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- Issue #9804: ascii() now always represents unicode surrogate pairs as a single
  ``\UXXXXXXXX``, regardless of whether the character is printable or not.
  Also, the "backslashreplace" error handler now joins surrogate pairs into a
  single character on UCS-2 builds.
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- Issue #9757: memoryview objects get a release() method to release the
  underlying buffer (previously this was only done when deallocating the
  memoryview), and gain support for the context management protocol.

2195 2196 2197
- Issue #9797: pystate.c wrongly assumed that zero couldn't be a valid
  thread-local storage key.

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Library
-------

2201 2202
- Issue #2236: distutils' mkpath ignored the mode parameter.

2203 2204 2205 2206 2207 2208 2209
- Fix typo in one sdist option (medata-check).

- Issue #9199: Fix incorrect use of distutils.cmd.Command.announce.

- Issue #1718574: Fix options that were supposed to accept arguments but did
  not in build_clib.

2210 2211
- Issue #9437: Fix building C extensions with non-default LDFLAGS.

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

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

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

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

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

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

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

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- Issue #10004: quoprimime no longer generates a traceback when confronted with
  invalid characters after '=' in a Q-encoded word.
2241

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- Issue #1491: BaseHTTPServer nows send a ``100 Continue`` response before
  sending a 200 OK for the Expect: 100-continue request header.
2244

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- Issue #9360: Cleanup and improvements to the nntplib module.  The API now
  conforms to the philosophy of bytes and unicode separation in Python 3.  A
  test suite has also been added.
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- Issue #9962: GzipFile now has the peek() method.

2251
- Issue #9090: When a socket with a timeout fails with EWOULDBLOCK or EAGAIN,
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  retry the select() loop instead of bailing out.  This is because select() can
  incorrectly report a socket as ready for reading (for example, if it received
  some data with an invalid checksum).
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- Issue #3612: Added new types to ctypes.wintypes. (CHAR and pointers)

2258
- Issue #9950: Fix socket.sendall() crash or misbehaviour when a signal is
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  received.  Now sendall() properly calls signal handlers if necessary, and
  retries sending if these returned successfully, including on sockets with a
  timeout.
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- Issue #9947: logging: Fixed locking bug in stopListening.

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- Issue #9945: logging: Fixed locking bugs in addHandler/removeHandler.

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- Issue #9936: Fixed executable lines' search in the trace module.

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- Issue #9790: Rework imports necessary for samefile and sameopenfile
  in ntpath.

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- Issue #9928: Properly initialize the types exported by the bz2 module.

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- Issue #1675951: Allow GzipFile to work with unseekable file objects.  Patch by
  Florian Festi.
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- Logging: Added QueueListener class to facilitate logging usage for
  performance-critical threads.

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- Issue #9916: Add some missing errno symbols.

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- Issue #9877: Expose sysconfig.get_makefile_filename()

- logging: Added hasHandlers() method to Logger and LoggerAdapter.

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

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- Issue #2643: msync() is not called anymore when deallocating an open mmap
  object, only munmap().

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- logging: Changed LoggerAdapter implementation internally, to make it easier to
  subclass in a useful way.
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- logging: hasHandlers method was added to Logger, and isEnabledFor,
  getEffectiveLevel, hasHandlers and setLevel were added to LoggerAdapter.
  LoggerAdapter was introduced into the unit tests for logging.

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- Issue #1686: Fix string.Template when overriding the pattern attribute.

2300
- Issue #9854: SocketIO objects now observe the RawIOBase interface in
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  non-blocking mode: they return None when an operation would block (instead of
  raising an exception).
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- Issue #1730136: Fix the comparison between a tk.font.Font and an object of
  another kind.

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- Issue #9441: logging has better coverage for rotating file handlers.

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- Issue #9865: collections.OrderedDict now has a __sizeof__ method.
2310

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- Issue #9854: The default read() implementation in io.RawIOBase now handles
  non-blocking readinto() returning None correctly.
2313

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- Issue #1552: socket.socketpair() now returns regular socket.socket objects
  supporting the whole socket API (rather than the "raw" _socket.socket
  objects).
2317

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- Issue #9853: Fix the signature of SSLSocket.recvfrom() and SSLSocket.sendto()
  to match the corresponding socket methods.
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- Issue #9840: Added a decorator to reprlib for wrapping __repr__ methods to make
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  them handle recursive calls within the same thread.
2323

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- logging: Enhanced HTTPHandler with secure and credentials initializers.

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- Issue #767645: Set os.path.supports_unicode_filenames to True on Mac OS X.
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- Issue #9837: The read() method of ZipExtFile objects (as returned by
  ZipFile.open()) could return more bytes than requested.

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- Issue #9826: OrderedDict.__repr__ can now handle self-referential values:
  d['x'] = d.
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- Issue #9825: Using __del__ in the definition of collections.OrderedDict made
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  it possible for the user to create self-referencing ordered dictionaries which
  become permanently uncollectable GC garbage.  Reinstated the Python 3.1
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  approach of using weakref proxies so that reference cycles never get created
  in the first place.

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- Issue #9579, #9580: Fix os.confstr() for value longer than 255 bytes and
  encode the value with filesystem encoding and surrogateescape (instead of
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  utf-8 in strict mode) . Patch written by David Watson.
2343

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- Issue #9632: Remove sys.setfilesystemencoding() function: use PYTHONFSENCODING
  environment variable to set the filesystem encoding at Python startup.
  sys.setfilesystemencoding() creates inconsistencies because it is unable to
  reencode all filenames in all objects.
2348

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- Issue #9410: Various optimizations to the pickle module, leading to speedups
  up to 4x (depending on the benchmark).  Mostly ported from Unladen Swallow;
  initial patch by Alexandre Vassalotti.
2352

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- The pprint module now supports printing OrderedDicts in their given order
  (formerly, it would sort the keys).
2355

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- Logging: Added QueueHandler class to facilitate logging usage with
  multiprocessing.

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- Issue #9707: Rewritten reference implementation of threading.local which is
  friendlier towards reference cycles.  This change is not normally visible
  since an optimized C implementation (_thread._local) is used instead.
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- Issue #6394: os.getppid() is now supported on Windows.  Note that it will
  still return the id of the parent process after it has exited.  This process
  id may even have been reused by another unrelated process.

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- Issue #9792: In case of connection failure, socket.create_connection() would
  swallow the exception and raise a new one, making it impossible to fetch the
  original errno, or to filter timeout errors.  Now the original error is
  re-raised.
2371

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- Issue #9758: When fcntl.ioctl() was called with mutable_flag set to True, and
  the passed buffer was exactly 1024 bytes long, the buffer wouldn't be updated
  back after the system call.  Original patch by Brian Brazil.
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- Updates to the random module:

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  * Document which parts of the module are guaranteed to stay the same across
    versions and which parts are subject to change.
2380

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  * Update the seed() method to use all of the bits in a string instead of just
    the hash value.  This makes better use of the seed value and assures the
    seeding is platform independent.  Issue #7889.
2384

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  * Improved the random()-->integer algorithm used in choice(), shuffle(),
    sample(), randrange(), and randint().  Formerly, it used int(n*random())
    which has a slight bias whenever n is not a power of two.  Issue #9025.
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  * Improved documentation of arguments to randrange().  Issue #9379.
2390

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- collections.OrderedDict now supports a new method for repositioning keys to
  either end.
2393

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- Issue #9754: Similarly to assertRaises and assertRaisesRegexp, unittest test
  cases now also have assertWarns and assertWarnsRegexp methods to check that a
  given warning type was triggered by the code under test.
2397

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- Issue #5506: BytesIO objects now have a getbuffer() method exporting a view of
  their contents without duplicating them.  The view is both readable and
  writable.
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- Issue #7566: Implement os.path.sameopenfile for Windows.

2404
- Issue #9293: I/O streams now raise ``io.UnsupportedOperation`` when an
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  unsupported operation is attempted (for example, writing to a file open only
  for reading).
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- hashlib has two new constant attributes: algorithms_guaranteed and
  algorithms_avaiable that respectively list the names of hash algorithms
  guaranteed to exist in all Python implementations and the names of hash
  algorithms available in the current process.

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- A new package ``concurrent.futures`` as defined by PEP 3148.

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C-API
-----

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- Add PyErr_SyntaxLocationEx, which supports passing a column offset.

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

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

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- Issue #9188: The gdb extension now handles correctly narrow (UCS2) as well as
  wide (UCS4) unicode builds for both the host interpreter (embedded inside gdb)
  and the interpreter under test.
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Tests
-----

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- Issue #9308: Added tests for importing encoded modules that do not
  depend on specific stdlib modules being encoded in a certain way.

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- Issue #1051: Add a script (Lib/test/make_ssl_certs.py) to generate the custom
  certificate and private key files used by SSL-related certs.
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- Issue #9978: Wait until subprocess completes initialization. (Win32KillTests
  in test_os)

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- Issue #7110: regrtest now sends test failure reports and single-failure
  tracebacks to stderr rather than stdout.

2446 2447
- Issue #9628: fix runtests.sh -x option so more than one test can be excluded.

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- Issue #9899: Fix test_tkinter.test_font on various platforms.  Patch by Ned
  Deily.
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- Issue #9894: Do not hardcode ENOENT in test_subprocess.

2453 2454
- Issue #9315: Added tests for the trace module.  Patch by Eli Bendersky.

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- Issue #9323: Make test.regrtest.__file__ absolute, this was not always the
  case when running profile or trace, for example.

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- Issue #9568: Fix test_urllib2_localnet on OS X 10.3.

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Build
-----

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- Issue #10062: Allow building on platforms which do not have sem_timedwait.

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- Issue #10054: Some platforms provide uintptr_t in inttypes.h.  Patch by Akira
  Kitada.
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- Issue #10055: Make json C89-compliant in UCS4 mode.

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

2472 2473
- Issue #1633863: Don't ignore $CC under AIX.

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- Issue #9810: Compile bzip2 source files in Python's project file directly. It
  used to be built with bzip2's makefile.
2476

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- Issue #9848: Stopping trying to build _weakref in setup.py as it is a built-in
  module.
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- Issue #9806: python-config now has an ``--extension-suffix`` option that
  outputs the suffix for dynamic libraries including the ABI version name
  defined by PEP 3149.

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- Issue #941346: Improve the build process under AIX and allow Python to be
  built as a shared library.  Patch by Sébastien Sablé.
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- Issue #4026: Make the fcntl extension build under AIX.  Patch by Sébastien
  Sablé.

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- Issue #9701: The MacOSX installer can patch the shell profile to ensure that
  the "bin" directory inside the framework is on the shell's search path. This
  feature now also supports the ZSH shell.

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

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*Release date: 05-Sep-2010*
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Core and Builtins
-----------------

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- Issue #9225: Remove the ROT_FOUR and DUP_TOPX opcode, the latter replaced by
  the new (and simpler) DUP_TOP_TWO.  Performance isn't changed, but our
  bytecode is a bit simplified.  Patch by Demur Rumed.
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- Issue #9766: Rename poorly named variables exposed by _warnings to prevent
  confusion with the proper variables names from 'warnings' itself.

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- Issue #9212: dict_keys and dict_items now provide the isdisjoint() method, to
  conform to the Set ABC.  Patch by Daniel Urban.
2512

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- Issue #9737: Fix a crash when trying to delete a slice or an item from a
  memoryview object.
2515

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- Issue #9549: sys.setdefaultencoding() and PyUnicode_SetDefaultEncoding() are
  now removed, since their effect was inexistent in 3.x (the default encoding is
  hardcoded to utf-8 and cannot be changed).
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- Issue #7415: PyUnicode_FromEncodedObject() now uses the new buffer API
  properly.  Patch by Stefan Behnel.

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- Issue #5553: The Py_LOCAL_INLINE macro now results in inlining on most
  platforms.  Previously, it inlined only when using Microsoft Visual C.
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- Issue #9712: Fix tokenize on identifiers that start with non-ascii names.

2528 2529
- Issue #9688: __basicsize__ and __itemsize__ must be accessed as Py_ssize_t.

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- Issue #9684: Added a definition for SIZEOF_WCHAR_T to PC/pyconfig.h, to match
  the pyconfig.h generated by configure on other systems.
2532

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- Issue #9666: Only catch AttributeError in hasattr(). All other exceptions that
  occur during attribute lookup are now propagated to the caller.
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- Issue #8622: Add PYTHONFSENCODING environment variable to override the
  filesystem encoding.

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- Issue #5127: The C functions that access the Unicode Database now accept and
  return characters from the full Unicode range, even on narrow unicode builds
  (Py_UNICODE_TOLOWER, Py_UNICODE_ISDECIMAL, and others).  A visible difference
  in Python is that unicodedata.numeric() now returns the correct value for
  large code points, and repr() may consider more characters as printable.

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- Issue #9425: Create PyModule_GetFilenameObject() function to get the filename
  as a unicode object, instead of a byte string. Function needed to support
  unencodable filenames. Deprecate PyModule_GetFilename() in favor on the new
  function.

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- Issue #8063: Call _PyGILState_Init() earlier in Py_InitializeEx().

2552 2553
- Issue #9612: The set object is now 64-bit clean under Windows.

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- Issue #8202: sys.argv[0] is now set to '-m' instead of '-c' when searching for
  the module file to be executed with the -m command line option.
2556

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- Issue #9599: Create PySys_FormatStdout() and PySys_FormatStderr() functions to
  write a message formatted by PyUnicode_FromFormatV() to sys.stdout and
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  sys.stderr.

2561
- Issue #9542: Create PyUnicode_FSDecoder() function, a ParseTuple converter:
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  decode bytes objects to unicode using PyUnicode_DecodeFSDefaultAndSize(); str
  objects are output as-is.
2564

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- Issue #9203: Computed gotos are now enabled by default on supported compilers
  (which are detected by the configure script).  They can still be disable
  selectively by specifying --without-computed-gotos.
2568

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- Issue #9425: Create PyErr_WarnFormat() function, similar to PyErr_WarnEx() but
  use PyUnicode_FromFormatV() to format the warning message.
2571

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- Issue #8530: Prevent stringlib fastsearch from reading beyond the front of an
  array.
2574

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- Issue #5319: Print an error if flushing stdout fails at interpreter shutdown.
2576

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- Issue #9337: The str() of a float or complex number is now identical to its
  repr().
2579

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- Issue #9416: Fix some issues with complex formatting where the output with no
  type specifier failed to match the str output:
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    - format(complex(-0.0, 2.0), '-') omitted the real part from the output,
    - format(complex(0.0, 2.0), '-') included a sign and parentheses.

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Extension Modules
-----------------
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- Issue #8013: time.asctime and time.ctime no longer call system
  asctime and ctime functions.  The year range for time.asctime is now
  1900 through maxint.  The range for time.ctime is the same as for
  time.localtime.  The string produced by these functions is longer
  than 24 characters when year is greater than 9999.

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

2598 2599 2600
- Issue #8734: Avoid crash in msvcrt.get_osfhandle() when an invalid file
  descriptor is provided.  Patch by Pascal Chambon.

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- Issue #7736: Release the GIL around calls to opendir() and closedir() in the
  posix module.  Patch by Marcin Bachry.
2603

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- Issue #4835: make PyLong_FromSocket_t() and PyLong_AsSocket_t() private to the
  socket module, and fix the width of socket descriptors to be correctly
  detected under 64-bit Windows.
2607

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- Issue #1027206: Support IDNA in gethostbyname, gethostbyname_ex, getaddrinfo
  and gethostbyaddr.  getnameinfo is now restricted to numeric addresses as
  input.
2611

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- Issue #9214: Set operations on a KeysView or ItemsView in collections now
  correctly return a set.  Patch by Eli Bendersky.
2614

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- Issue #5737: Add Solaris-specific mnemonics in the errno module.  Patch by
  Matthew Ahrens.

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- Restore GIL in nis_cat in case of error. Decode NIS data to fs encoding, using
  the surrogate error handler.
2620

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- Issue #665761: ``functools.reduce()`` will no longer mask exceptions other
  than ``TypeError`` raised by the iterator argument.
2623

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- Issue #9570: Use PEP 383 decoding in os.mknod and os.mkfifo.

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- Issue #6915: Under Windows, os.listdir() didn't release the Global Interpreter
  Lock around all system calls.  Original patch by Ryan Kelly.
2628

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- Issue #8524: Add a detach() method to socket objects, so as to put the socket
  into the closed state without closing the underlying file descriptor.
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- Issue #477863: Emit a ResourceWarning at shutdown if gc.garbage is not empty.
2633

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- Issue #6869: Fix a refcount problem in the _ctypes extension.

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- Issue #5504: ctypes should now work with systems where mmap can't be
  PROT_WRITE and PROT_EXEC.
2638

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- Issue #9507: Named tuple repr will now automatically display the right name in
  a tuple subclass.
2641

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- Issue #9324: Add parameter validation to signal.signal on Windows in order to
  prevent crashes.
2644

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- Issue #9526: Remove some outdated (int) casts that were preventing the array
  module from working correctly with arrays of more than 2**31 elements.
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- Fix memory leak in ssl._ssl._test_decode_cert.

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- Issue #8065: Fix memory leak in readline module (from failure to free the
  result of history_get_history_state()).
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- Issue #9450: Fix memory leak in readline.replace_history_item and
  readline.remove_history_item for readline version >= 5.0.

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- Issue #8105: Validate file descriptor passed to mmap.mmap on Windows.

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- Issue #8046: Add context manager protocol support and .closed property to mmap
  objects.
2660

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Library
-------

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- Issue #7451: Improve decoding performance of JSON objects, and reduce the
  memory consumption of said decoded objects when they use the same strings as
  keys.
2667

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- Issue #1100562: Fix deep-copying of objects derived from the list and dict
  types.  Patch by Michele Orrù and Björn Lindqvist.
2670

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- Issue #9753: Fixed socket.dup, which did not always work correctly on Windows.
2672

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

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- Issue #8990: array.fromstring() and array.tostring() get renamed to
  frombytes() and tobytes(), respectively, to avoid confusion.  Furthermore,
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  array.frombytes(), array.extend() as well as the array.array() constructor now
  accept bytearray objects.  Patch by Thomas Jollans.
2683

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- Issue #808164: Fixed socket.close to avoid references to globals, to avoid
  issues when socket.close is called from a __del__ method.
2686

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

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- Issue #1868: Eliminate subtle timing issues in thread-local objects by getting
  rid of the cached copy of thread-local attribute dictionary.
2692

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2693 2694
- Issue #1512791: In setframerate() in the wave module, non-integral frame rates
  are rounded to the nearest integer.
2695

2696 2697 2698
- Issue #8797: urllib2 does a retry for Basic Authentication failure instead of
  falling into recursion.

2699 2700 2701
- Issue #1194222: email.utils.parsedate now returns RFC2822 compliant four
  character years even if the message contains RFC822 two character years.

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2702 2703
- Issue #8750: Fixed MutableSet's methods to correctly handle reflexive
  operations on its self, namely x -= x and x ^= x.
2704

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Georg Brandl committed
2705 2706
- Issue #9129: smtpd.py is vulnerable to DoS attacks deriving from missing error
  handling when accepting a new connection.
2707

2708
- Issue #9601: ftplib now provides a workaround for non-compliant
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2709 2710
  implementations such as IIS shipped with Windows server 2003 returning invalid
  response codes for MKD and PWD commands.
2711

2712
- Issue #658749: asyncore's connect() method now correctly interprets winsock
2713
  errors.
2714

2715 2716
- Issue #9501: Fixed logging regressions in cleanup code.

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Georg Brandl committed
2717
- Fix functools.total_ordering() to skip methods inherited from object.
2718

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Georg Brandl committed
2719 2720
- Issue #9572: Importlib should not raise an exception if a directory it thought
  it needed to create was done concurrently by another process.
2721

2722 2723 2724
- Issue #9617: Signals received during a low-level write operation aren't
  ignored by the buffered IO layer anymore.

2725 2726
- Issue #843590: Make "macintosh" an alias to the "mac_roman" encoding.

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2727 2728
- Create os.fsdecode(): decode from the filesystem encoding with surrogateescape
  error handler, or strict error handler on Windows.
2729

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2730 2731
- Issue #3488: Provide convenient shorthand functions ``gzip.compress`` and
  ``gzip.decompress``.  Original patch by Anand B. Pillai.
2732

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2733 2734
- Issue #8807: poplib.POP3_SSL class now accepts a context parameter, which is a
  ssl.SSLContext object allowing bundling SSL configuration options,
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  certificates and private keys into a single (potentially long-lived)
  structure.

2738 2739 2740
- Issue #8866: parameters passed to socket.getaddrinfo can now be specified as
  single keyword arguments.

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2741 2742
- Address XXX comment in dis.py by having inspect.py prefer to reuse the dis.py
  compiler flag values over defining its own.
2743

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Georg Brandl committed
2744 2745
- Issue #9147: Added dis.code_info() which is similar to show_code() but returns
  formatted code information in a string rather than displaying on screen.
2746

2747
- Issue #9567: functools.update_wrapper now adds a __wrapped__ attribute
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2748
  pointing to the original callable.
2749

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2750 2751
- Issue #3445: functools.update_wrapper now tolerates missing attributes on
  wrapped callables.
2752

2753 2754
- Issue #5867: Add abc.abstractclassmethod and abc.abstractstaticmethod.

2755 2756 2757
- Issue #9605: posix.getlogin() decodes the username with file filesystem
  encoding and surrogateescape error handler. Patch written by David Watson.

2758 2759 2760
- Issue #9604: posix.initgroups() encodes the username using the fileystem
  encoding and surrogateescape error handler. Patch written by David Watson.

2761
- Issue #9603: posix.ttyname() and posix.ctermid() decode the terminal name
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2762 2763
  using the filesystem encoding and surrogateescape error handler. Patch written
  by David Watson.
2764

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Georg Brandl committed
2765 2766
- Issue #7647: The posix module now has the ST_RDONLY and ST_NOSUID constants,
  for use with the statvfs() function.  Patch by Adam Jackson.
2767

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2768 2769 2770
- Issue #8688: MANIFEST files created by distutils now include a magic comment
  indicating they are generated.  Manually maintained MANIFESTs without this
  marker will not be overwritten or removed.
2771

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2772 2773 2774
- Issue #7467: when reading a file from a ZIP archive, its CRC is checked and a
  BadZipfile error is raised if it doesn't match (as used to be the case in
  Python 2.5 and earlier).
2775

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2776 2777 2778 2779
- Issue #9550: a BufferedReader could issue an additional read when the original
  read request had been satisfied, which could block indefinitely when the
  underlying raw IO channel was e.g. a socket.  Report and original patch by
  Jason V. Miller.
2780

2781
- Issue #3757: thread-local objects now support cyclic garbage collection.
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2782 2783
  Thread-local objects involved in reference cycles will be deallocated timely
  by the cyclic GC, even if the underlying thread is still running.
2784

2785
- Issue #9452: Add read_file, read_string, and read_dict to the configparser
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2786 2787
  API; new source attribute to exceptions.

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2788 2789
- Issue #6231: Fix xml.etree.ElementInclude to include the tail of the current
  node.
2790

2791 2792 2793
- Issue #8047: Fix the xml.etree serializer to return bytes by default.  Use
  ``encoding="unicode"`` to generate a Unicode string.

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2794 2795 2796
- Issue #8280: urllib2's Request method will remove fragments in the url.  This
  is how it is supposed to work, wget and curl do the same.  Previous behavior
  was wrong.
2797

2798
- Issue #6683: For SMTP logins we now try all authentication methods advertised
2799 2800
  by the server.  Many servers are buggy and advertise authentication methods
  they do not support in reality.
2801

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2802 2803 2804
- Issue #8814: function annotations (the ``__annotations__`` attribute) are now
  included in the set of attributes copied by default by functools.wraps and
  functools.update_wrapper.  Patch by Terrence Cole.
2805

2806 2807
- Issue #2944: asyncore doesn't handle connection refused correctly.

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2808 2809
- Issue #4184: Private attributes on smtpd.SMTPChannel made public and deprecate
  the private attributes. Add tests for smtpd module.
2810

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2811 2812
- Issue #3196: email header decoding is now forgiving if an RFC2047 encoded word
  encoded in base64 is lacking padding.
2813

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2814 2815 2816
- Issue #9444: Argparse now uses the first element of prefix_chars as the option
  character for the added 'h/help' option if prefix_chars does not contain a
  '-', instead of raising an error.
2817

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2818 2819
- Issue #7372: Fix pstats regression when stripping paths from profile data
  generated with the profile module.
2820

Georg Brandl's avatar
Georg Brandl committed
2821 2822
- Issue #9428: Fix running scripts with the profile/cProfile modules from the
  command line.
2823

Georg Brandl's avatar
Georg Brandl committed
2824 2825
- Issue #7781: Fix restricting stats by entry counts in the pstats interactive
  browser.
2826

Georg Brandl's avatar
Georg Brandl committed
2827 2828
- Issue #9209: Do not crash in the pstats interactive browser on invalid regular
  expressions.
2829

Georg Brandl's avatar
Georg Brandl committed
2830 2831
- Update collections.OrderedDict to match the implementation in Py2.7 (based on
  lists instead of weakly referenced Link objects).
2832

Georg Brandl's avatar
Georg Brandl committed
2833 2834
- Issue #8397: Raise an error when attempting to mix iteration and regular reads
  on a BZ2File object, rather than returning incorrect results.
2835

2836 2837 2838
- Issue #9448: Fix a leak of OS resources (mutexes or semaphores) when
  re-initializing a buffered IO object by calling its ``__init__`` method.

2839 2840 2841
- Issue #1713: Fix os.path.ismount(), which returned true for symbolic links
  across devices.

2842 2843
- Issue #8826: Properly load old-style "expires" attribute in http.cookies.

2844 2845
- Issue #1690103: Fix initial namespace for code run with trace.main().

Georg Brandl's avatar
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2846 2847
- Issue #7395: Fix tracebacks in pstats interactive browser.

2848 2849
- Issue #8230: Fix Lib/test/sortperf.py.

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Terry Reedy committed
2850 2851
- Issue #8620: when a cmd.Cmd() is fed input that reaches EOF without a final
  newline, it no longer truncates the last character of the last command line.
2852

2853 2854
- Issue #5146: Handle UID THREAD command correctly in imaplib.

2855 2856 2857
- Issue #5147: Fix the header generated for cookie files written by
  http.cookiejar.MozillaCookieJar.

Georg Brandl's avatar
Georg Brandl committed
2858 2859
- Issue #8198: In pydoc, output all help text to the correct stream when
  sys.stdout is reassigned.
2860

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2861 2862
- Issue #7909: Do not touch paths with the special prefixes ``\\.\`` or ``\\?\``
  in ntpath.normpath().
2863

2864 2865
- Issue #1286: Allow using fileinput.FileInput as a context manager.

2866
- Add lru_cache() decorator to the functools module.
2867

2868 2869 2870
Tools/Demos
-----------

2871 2872
- Fix ``Tools/scripts/checkpyc.py`` after PEP 3147.

2873 2874 2875
- Issue #8867: Fix ``Tools/scripts/serve.py`` to work with files containing
  non-ASCII content.

2876 2877 2878
Tests
-----

2879 2880
- Issue #9601: Provide a test case for ftplib.parse257.

2881 2882
- Issue #8857: Provide a test case for socket.getaddrinfo.

2883 2884
- Issue #7564: Skip test_ioctl if another process is attached to /dev/tty.

2885 2886
- Issue #8433: Fix test_curses failure with newer versions of ncurses.

2887 2888 2889
- Issue #9496: Provide a test suite for the rlcompleter module.  Patch by
  Michele Orrù.

2890 2891
- Issue #8687: provide a test suite for sched.py module.

2892 2893 2894
Build
-----

2895 2896
- Issue #1303434: Generate ZIP file containing all PDBs.

2897 2898
- Issue #9193: PEP 3149 is accepted.

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2899 2900
- Issue #3101: Helper functions _add_one_to_index_C() and _add_one_to_index_F()
  become _Py_add_one_to_index_C() and _Py_add_one_to_index_F(), respectively.
2901

2902 2903 2904
- Issue #9700: define HAVE_BROKEN_POSIX_SEMAPHORES under AIX 6.x.  Patch by
  Sébastien Sablé.

2905 2906
- Don't run pgen twice when using make -j.

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2907

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2908 2909 2910
What's New in Python 3.2 Alpha 1?
=================================

2911
*Release date: 01-Aug-2010*
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Core and Builtins
-----------------

2916 2917
- Issue #8991: convertbuffer() rejects discontigious buffers.

2918 2919 2920
- Issue #7616: Fix copying of overlapping memoryview slices with the Intel
  compiler.

2921 2922
- Issue #8413: structsequence now subclasses tuple.

2923
- Issue #8271: during the decoding of an invalid UTF-8 byte sequence, only the
2924 2925 2926 2927 2928 2929
  start byte and the continuation byte(s) are now considered invalid, instead of
  the number of bytes specified by the start byte.  E.g.:
  '\xf1\x80AB'.decode('utf-8', 'replace') now returns u'\ufffdAB' and replaces
  with U+FFFD only the start byte ('\xf1') and the continuation byte ('\x80')
  even if '\xf1' is the start byte of a 4-bytes sequence.  Previous versions
  returned a single u'\ufffd'.
2930

2931 2932
- Issue #9011: A negated imaginary literal (e.g., "-7j") now has real part -0.0
  rather than 0.0.  So "-7j" is now exactly equivalent to "-(7j)".
2933

2934 2935
- Be more specific in error messages about positional arguments.

2936 2937 2938
- Issue #8949: "z" format of PyArg_Parse*() functions doesn't accept bytes
  objects, as described in the documentation.

2939
- Issue #6543: Write the traceback in the terminal encoding instead of utf-8.
2940
  Fix the encoding of the modules filename.  Patch written by Amaury Forgeot
2941
  d'Arc.
2942

2943 2944 2945
- Issue #9011: Remove buggy and unnecessary (in 3.x) ST->AST compilation code
  dealing with unary minus applied to a constant.  The removed code was mutating
  the ST, causing a second compilation to fail.
2946

2947
- Issue #850997: mbcs encoding (Windows only) handles errors argument: strict
2948
  mode raises unicode errors.  The encoder only supports "strict" and "replace"
2949
  error handlers, the decoder only supports "strict" and "ignore" error
2950
  handlers.  Patch written by Mark Hammond.
2951

2952 2953 2954
- Issue #8850: Remove "w" and "w#" formats from PyArg_Parse*() functions, use
  "w*" format instead. Add tests for "w*" format.

2955
- Issue #8592: PyArg_Parse*() functions raise a TypeError for "y", "u" and "Z"
2956
  formats if the string contains a null byte/character.  Write unit tests for
2957 2958
  string formats.

2959
- Issue #7490: To facilitate sharing of doctests between 2.x and 3.x test
2960 2961 2962
  suites, the IGNORE_EXCEPTION_DETAIL directive now also ignores the module
  location of the raised exception.

2963 2964 2965
- Issue #8969: On Windows, use mbcs codec in strict mode to encode and decode
  filenames and enable os.fsencode().

2966 2967
- Issue #9058: Remove assertions about INT_MAX in UnicodeDecodeError.

2968 2969 2970
- Issue #8941: Decoding big endian UTF-32 data in UCS-2 builds could crash the
  interpreter with characters outside the Basic Multilingual Plane (higher than
  0x10000).
2971

2972 2973 2974 2975
- Issue #8950: (See also issue #5080).  Py_ArgParse*() functions now raise
  TypeError instead of giving a DeprecationWarning when a float is parsed using
  the 'L' code (for long long).  (All other integer codes already raise
  TypeError in this case.)
2976

2977 2978 2979 2980
- Issue #8922: Normalize the encoding name in PyUnicode_AsEncodedString() to
  enable shortcuts for upper case encoding name. Add also a shortcut for
  "iso-8859-1" in PyUnicode_AsEncodedString() and PyUnicode_Decode().

2981 2982
- Issue #8838: Remove codecs.charbuffer_encode() function.  The buffer protocol
  doesn't support "char buffer" anymore in Python 3.
2983 2984

- Issue #8339: Remove "t#" format of PyArg_Parse*() functions, use "s#" or "s*"
2985
  instead.  codecs.charbuffer_encode() now accepts modifiable buffer objects
2986 2987
  like bytearray.

2988
- Issue #8837: Remove "O?" format of PyArg_Parse*() functions.  The format is no
2989 2990
  used anymore and it was never documented.

2991
- In str.format(), raise a ValueError when indexes to arguments are too large.
2992

2993 2994
- Issue #2844: Make int('42', n) consistently raise ValueError for invalid
  integers n (including n = -909).
2995

2996 2997 2998 2999
- Issue #8188: Introduce a new scheme for computing hashes of numbers (instances
  of int, float, complex, decimal.Decimal and fractions.Fraction) that makes it
  easy to maintain the invariant that hash(x) == hash(y) whenever x and y have
  equal value.
3000

3001 3002
- Issue #8748: Fix two issues with comparisons between complex and integer
  objects.  (1) The comparison could incorrectly return True in some cases
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  (2**53+1 == complex(2**53) == 2**53), breaking transitivity of equality.
  (2) The comparison raised an OverflowError for large integers, leading to
  unpredictable exceptions when combining integers and complex objects in sets
  or dicts.
3007

3008 3009 3010
- Issue #8766: Initialize _warnings module before importing the first module.
  Fix a crash if an empty directory called "encodings" exists in sys.path.

3011
- Issue #8589: Decode PYTHONWARNINGS environment variable with the file system
3012
  encoding and surrogateescape error handler instead of the locale encoding to
3013
  be consistent with os.environ.  Add PySys_AddWarnOptionUnicode() function.
3014

3015 3016
- PyObject_Dump() encodes unicode objects to utf8 with backslashreplace (instead
  of strict) error handler to escape surrogates.
3017

3018 3019
- Issue #8715: Create PyUnicode_EncodeFSDefault() function: Encode a Unicode
  object to Py_FileSystemDefaultEncoding with the "surrogateescape" error
3020
  handler, and return bytes.  If Py_FileSystemDefaultEncoding is not set, fall
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3021
  back to UTF-8.
3022

3023
- Enable shortcuts for common encodings in PyUnicode_AsEncodedString() for any
3024
  error handler, not only the default error handler (strict).
3025

3026
- Issue #8610: Load file system codec at startup, and display a fatal error on
3027
  failure.  Set the file system encoding to utf-8 (instead of None) if getting
3028 3029
  the locale encoding failed, or if nl_langinfo(CODESET) function is missing.

3030
- PyFile_FromFd() uses PyUnicode_DecodeFSDefault() instead of
3031 3032
  PyUnicode_FromString() to support surrogates in the filename and use the right
  encoding.
3033

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3034 3035
- Issue #7507: Quote "!" in pipes.quote(); it is special to some shells.

3036
- PyUnicode_DecodeFSDefaultAndSize() uses surrogateescape error handler.
3037

3038 3039 3040
- Issue #8419: Prevent the dict constructor from accepting non-string keyword
  arguments.

3041
- Issue #8124: PySys_WriteStdout() and PySys_WriteStderr() don't execute
3042 3043
  indirectly Python signal handlers anymore because mywrite() ignores exceptions
  (KeyboardInterrupt).
3044

3045
- Issue #8092: Fix PyUnicode_EncodeUTF8() to support error handler producing
3046
  unicode string (eg. backslashreplace).
3047

3048 3049
- Issue #8485: PyUnicode_FSConverter() doesn't accept byteearray objects
  anymore, you have to convert your bytearray filenames to bytes.
3050

3051
- Issue #7332: Remove the 16KB stack-based buffer in
3052 3053 3054
  PyMarshal_ReadLastObjectFromFile, which doesn't bring any noticeable benefit
  compared to the dynamic memory allocation fallback.  Patch by Charles-François
  Natali.
3055

3056 3057 3058
- Issue #8417: Raise an OverflowError when an integer larger than sys.maxsize is
  passed to bytes or bytearray.

3059 3060
- Issue #7301: Add environment variable $PYTHONWARNINGS.

3061 3062 3063
- Issue #8329: Don't return the same lists from select.select when no fds are
  changed.

3064 3065 3066
- Issue #8259: 1L << (2**31) no longer produces an 'outrageous shift error' on
  64-bit machines.  The shift count for either left or right shift is permitted
  to be up to sys.maxsize.
3067

3068 3069
- Ensure that tokenization of identifiers is not affected by locale.

3070 3071
- Issue #1222585: Added LDCXXSHARED for C++ support. Patch by Arfrever.

3072 3073
- Raise a TypeError when trying to delete a T_STRING_INPLACE struct member.

3074 3075
- Issue #8211: Save/restore CFLAGS around AC_PROG_CC in configure.in, in case it
  is set.
3076

3077
- Issue #8226: sys.setfilesystemencoding() raises a LookupError if the encoding
3078
  is unknown.
3079

3080
- Issue #1583863: A str subclass can now override the __str__ method.
3081

3082
- Issue #8014: Setting a T_UINT or T_PYSSIZET attribute of an object with
3083
  PyMemberDefs could produce an internal error; raise TypeError instead.
3084

3085 3086 3087 3088 3089
- Issue #7845: Rich comparison methods on the complex type now return
  NotImplemented rather than raising a TypeError when comparing with an
  incompatible type; this allows user-defined classes to implement their own
  comparisons with complex.

3090 3091
- Issue #3137: Don't ignore errors at startup, especially a keyboard interrupt
  (SIGINT). If an error occurs while importing the site module, the error is
3092
  printed and Python exits. Initialize the GIL before importing the site module.
3093

3094 3095
- Issue #7173: Generator finalization could invalidate sys.exc_info().

3096 3097
- Issue #7544: Preallocate thread memory before creating the thread to avoid a
  fatal error in low memory condition.
3098

3099 3100
- Issue #7820: The parser tokenizer restores all bytes in the right if the BOM
  check fails.
3101

3102 3103
- Handle errors from looking up __prepare__ correctly.

3104 3105
- Issue #5939: Add additional runtime checking to ensure a valid capsule in
  Modules/_ctypes/callproc.c.
3106

3107
- Issue #7309: Fix unchecked attribute access when converting
3108
  UnicodeEncodeError, UnicodeDecodeError, and UnicodeTranslateError to strings.
3109

3110 3111
- Issue #6902: Fix problem with built-in types format incorrectly with 0
  padding.
3112

3113 3114
- Issue #7988: Fix default alignment to be right aligned for complex.__format__.
  Now it matches other numeric types.
3115

3116
- Issue #5988: Remove deprecated functions PyOS_ascii_formatd,
3117 3118
  PyOS_ascii_strtod, and PyOS_ascii_atof.  Use PyOS_double_to_string and
  PyOS_string_to_double instead.  See issue #5835 for the original deprecations.
3119

3120 3121
- Issue #7385: Fix a crash in `MemoryView_FromObject` when `PyObject_GetBuffer`
  fails.  Patch by Florent Xicluna.
3122

3123 3124
- Issue #7788: Fix an interpreter crash produced by deleting a list slice with
  very large step value.
3125

3126 3127 3128 3129
- Issue #7766: Change sys.getwindowsversion() return value to a named tuple and
  add the additional members returned in an OSVERSIONINFOEX structure.  The new
  members are service_pack_major, service_pack_minor, suite_mask, and
  product_type.
3130

3131 3132 3133
- Issue #7561: Operations on empty bytearrays (such as `int(bytearray())`) could
  crash in many places because of the PyByteArray_AS_STRING() macro returning
  NULL.  The macro now returns a statically allocated empty string instead.
3134

3135
- Issue #6690: Optimize the bytecode for expressions such as `x in {1, 2, 3}`,
3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151
  where the right hand operand is a set of constants, by turning the set into a
  frozenset and pre-building it as a constant.  The comparison operation is made
  against the constant instead of building a new set each time it is executed (a
  similar optimization already existed which turned a list of constants into a
  pre-built tuple).  Patch and additional tests by Dave Malcolm.

- Issue #7622: Improve the split(), rsplit(), splitlines() and replace() methods
  of bytes, bytearray and unicode objects by using a common implementation based
  on stringlib's fast search.  Patch by Florent Xicluna.

- Issue #7632: Fix various str -> float conversion bugs present in 2.7 alpha 2,
  including: (1) a serious 'wrong output' bug that could occur for long (> 40
  digit) input strings, (2) a crash in dtoa.c that occurred in debug builds when
  parsing certain long numeric strings corresponding to subnormal values, (3) a
  memory leak for some values large enough to cause overflow, and (4) a number
  of flaws that could lead to incorrectly rounded results.
3152

3153 3154 3155
- The __complex__ method is now looked up on the class of instances to make it
  consistent with other special methods.

3156 3157 3158
- Issue #7462: Implement the stringlib fast search algorithm for the `rfind`,
  `rindex`, `rsplit` and `rpartition` methods.  Patch by Florent Xicluna.

3159 3160 3161
- Issue #7604: Deleting an unset slotted attribute did not raise an
  AttributeError.

3162 3163
- Issue #7534: Fix handling of IEEE specials (infinities, nans, negative zero)
  in ** operator.  The behaviour now conforms to that described in C99 Annex F.
3164

3165 3166 3167 3168
- Issue #1811: improve accuracy and cross-platform consistency for true division
  of integers: the result of a/b is now correctly rounded for ints a and b (at
  least on IEEE 754 platforms), and in particular does not depend on the
  internal representation of an int.
3169

3170 3171 3172
- Issue #6834: replace the implementation for the 'python' and 'pythonw'
  executables on OSX.

3173 3174 3175
  These executables now work properly with the arch(1) command: ``arch -ppc
  python`` will start a universal binary version of python in PPC mode (unlike
  previous releases).
3176

3177 3178
- Issue #7466: Segmentation fault when the garbage collector is called in the
  middle of populating a tuple.  Patch by Florent Xicluna.
3179

3180 3181 3182
- Issue #7419: setlocale() could crash the interpreter on Windows when called
  with invalid values.

3183 3184 3185
- Issue #6077: On Windows, files opened with tempfile.TemporaryFile in "wt+"
  mode would appear truncated on the first '0x1a' byte (aka. Ctrl+Z).

3186 3187
- Issue #7085: Fix crash when importing some extensions in a thread on MacOSX
  10.6.
3188

3189 3190
- Issue #1757126: Fix the cyrillic-asian alias for the ptcp154 encoding.

3191 3192 3193
- Issue #6970: Remove redundant calls when comparing objects that don't
  implement the relevant rich comparison methods.

3194 3195 3196 3197 3198
- Issue #7298: Fixes for range and reversed(range(...)).  Iteration over
  range(a, b, c) incorrectly gave an empty iterator when a, b and c fit in C
  long but the length of the range did not.  Also fix several cases where
  reversed(range(a, b, c)) gave wrong results, and fix a refleak for
  reversed(range(a, b, c)) with large arguments.
3199

3200 3201
- Issue #7244: itertools.izip_longest() no longer ignores exceptions raised
  during the formation of an output tuple.
3202

3203 3204 3205
- Issue #3297: On wide unicode builds, do not split unicode characters into
  surrogates.

3206 3207
- Remove length limitation when constructing a complex number from a string.

3208 3209
- Issue #1087418: Boost performance of bitwise operations for longs.

3210 3211 3212 3213 3214 3215 3216
- Support for AtheOS has been completely removed from the code base. It was
  disabled since Python 3.0.

- Support for several legacy threading libraries has been disabled. These
  libraries are: Mach C threads, SunOS LWP, GNU pth, Irix threads. Support code
  will be entirely removed in 3.3.

Jesus Cea's avatar
Jesus Cea committed
3217
- Support for OSF* has been disabled. If nobody stands up, support will be
3218
  removed in 3.3. See <http://bugs.python.org/issue8606>.
Jesus Cea's avatar
Jesus Cea committed
3219

3220 3221
- Peephole constant folding had missed UNARY_POSITIVE.

3222 3223 3224 3225
- Issue #1722344: threading._shutdown() is now called in Py_Finalize(), which
  fixes the problem of some exceptions being thrown at shutdown when the
  interpreter is killed. Patch by Adam Olsen.

3226
- Issue #7147: Remove support for compiling Python without complex number
3227 3228
  support.

3229 3230
- Issue #7120: logging: Removed import of multiprocessing which is causing crash
  in GAE.
3231

3232 3233 3234
- Issue #1754094: Improve the stack depth calculation in the compiler.  There
  should be no other effect than a small decrease in memory use.  Patch by
  Christopher Tur Lesniewski-Laas.
3235

3236 3237
- Issue #7065: Fix a crash in bytes.maketrans and bytearray.maketrans when using
  byte values greater than 127.  Patch by Derk Drukker.
3238

3239 3240 3241 3242 3243
- Issue #1571184: The Unicode database contains properties for more characters.
  The tables for code points representing numeric values, white spaces or line
  breaks are now generated from the official Unicode Character Database files,
  and include information from the Unihan.txt file.

3244 3245
- Issue #7019: Raise ValueError when unmarshalling bad long data, instead of
  producing internally inconsistent Python longs.
3246

3247 3248
- Issue #6990: Fix threading.local subclasses leaving old state around after a
  reference cycle GC which could be recycled by new locals.
3249

3250 3251
- Issue #5460: Fix an ambiguity in the grammar.

3252 3253
- Issue #1766304: Improve performance of membership tests on range objects.

3254 3255
- Issue #6713: Improve performance of integer -> string conversions.

3256 3257
- Issue #6846: Fix bug where bytearray.pop() returns negative integers.

3258 3259
- Issue #6750: A text file opened with io.open() could duplicate its output when
  writing from multiple threads at the same time.
3260

3261 3262
- Issue #6707: dir() on an uninitialized module caused a crash.

3263 3264
- Issue #6540: Fixed crash for bytearray.translate() with invalid parameters.

3265 3266 3267
- Issue #6573: set.union() stopped processing inputs if an instance of self
  occurred in the argument chain.

3268 3269
- Issue #6070: On posix platforms import no longer copies the execute bit from
  the .py file to the .pyc file if it is set.
3270

3271 3272
- Issue #1616979: Added the cp720 (Arabic DOS) encoding.

3273 3274
- Issue #6428: Since Python 3.0, the __bool__ method must return a bool object,
  and not an int.  Fix the corresponding error message, and the documentation.
3275

Benjamin Peterson's avatar
Benjamin Peterson committed
3276 3277
- The deprecated PyCObject has been removed.

3278 3279 3280
- Issue #6347: Include inttypes.h as well as stdint.h in pyport.h.  This fixes a
  build failure on HP-UX: int32_t and uint32_t are defined in inttypes.h instead
  of stdint.h on that platform.
3281

3282 3283
- Issue #6373: Fixed a SystemError when encoding with the latin-1 codec and the
  'surrogateescape' error handler, a string which contains unpaired surrogates.
3284

3285 3286
- Issue #4856: Remove checks for win NT.

3287 3288
- Issue #6687: PyBytes_FromObject() no longer accepts an integer as its argument
  to construct a null-initialized bytes object.
3289

3290 3291
- Issue #1023290: Add from_bytes() and to_bytes() methods to integers.  These
  methods allow the conversion of integers to bytes, and vice-versa.
3292

3293 3294 3295
- Issue #7382: Fix bug in bytes.__getnewargs__ that prevented bytes instances
  from being copied with copy.copy(), and bytes subclasses from being pickled
  properly.
3296

3297 3298
- Code objects now support weak references.

3299
- Issue #7072: isspace(0xa0) is true on Mac OS X.
3300

3301
- Issue #8084: PEP 370 now conforms to system conventions for framework builds
3302 3303
  on MacOS X. That is, "python setup.py install --user" will install into
  "~/Library/Python/2.7" instead of "~/.local".
3304

3305 3306 3307
C-API
-----

3308 3309 3310 3311
- Issue #2443: A new macro, `Py_VA_COPY`, copies the state of the
  variable argument list.  `Py_VA_COPY` is equivalent to C99
  `va_copy`, but available on all python platforms.

3312 3313 3314 3315
- PySlice_GetIndicesEx now clips the step to [-PY_SSIZE_T_MAX, PY_SSIZE_T_MAX]
  instead of [-PY_SSIZE_T_MAX-1, PY_SSIZE_T_MAX].  This makes it safe to do
  "step = -step" when reversing a slice.

3316 3317 3318
- Issue #5753: A new C API function, `PySys_SetArgvEx`, allows embedders of the
  interpreter to set sys.argv without also modifying sys.path.  This helps fix
  `CVE-2008-5983
3319 3320
  <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5983>`_.

3321 3322 3323
- Add PyArg_ValidateKeywordArguments, which checks if all keyword arguments are
  strings in an efficient manner.

3324
- Issue #8276: PyEval_CallObject() is now only available in macro form.  The
3325 3326
  function declaration, which was kept for backwards compatibility reasons, is
  now removed (the macro was introduced in 1997!).
3327

3328 3329
- Issue #7767: New function PyLong_AsLongLongAndOverflow added, analogous to
  PyLong_AsLongAndOverflow.
3330

3331 3332 3333
- Make PyUnicode_CompareWithASCIIString return not equal if the Python string
  has '\0' at the end.

3334
- Issue #5080: The argument parsing functions PyArg_ParseTuple,
3335 3336 3337
  PyArg_ParseTupleAndKeywords, PyArg_VaParse, PyArg_VaParseTupleAndKeywords and
  PyArg_Parse now raise a DeprecationWarning for float arguments passed with the
  'L' format code.  This will become a TypeError in a future version of Python,
3338 3339
  to match the behaviour of the other integer format codes.

3340
- Issue #7033: Function ``PyErr_NewExceptionWithDoc()`` added.
3341

3342 3343
- Issue #7414: 'C' code wasn't being skipped properly (for keyword arguments) in
  PyArg_ParseTupleAndKeywords.
3344

3345 3346
- Issue #7228: Add '%lld' and '%llu' support to PyString_FromFormat(V) and
  PyErr_Format, on machines with HAVE_LONG_LONG defined.
3347

3348 3349 3350
- Issue #6151: Made PyDescr_COMMON conform to standard C (like PyObject_HEAD in
  PEP 3123).  The PyDescr_TYPE and PyDescr_NAME macros should be should used for
  accessing the d_type and d_name members of structures using PyDescr_COMMON.
3351 3352

- Issue #6405: Remove duplicate type declarations in descrobject.h.
3353

3354 3355
- The code flags for old __future__ features are now available again.

3356 3357 3358 3359 3360 3361 3362 3363 3364
- Issue #5954: Add a PyFrame_GetLineNumber() function to replace most uses of
  PyCode_Addr2Line().

- Issue #5959: Add a PyCode_NewEmpty() function to create a new empty code
  object at a specified file, function, and line number.

- Issue #1419652: Change the first argument to PyImport_AppendInittab() to
  ``const char *`` as the string is stored beyond the call.

3365 3366 3367 3368
- Issue #2422: When compiled with the ``--with-valgrind`` option, the pymalloc
  allocator will be automatically disabled when running under Valgrind.  This
  gives improved memory leak detection when running under Valgrind, while taking
  advantage of pymalloc at other times.
3369

Benjamin Peterson's avatar
Benjamin Peterson committed
3370 3371
Library
-------
3372

3373 3374
- In pdb, when Ctrl-C is entered while defining commands for a breakpoint, the
  old commands are restored.
3375

3376 3377 3378
- For traceback debugging, the pdb listing now also shows the locations where
  the exception was originally (re)raised, if it differs from the last line
  executed (e.g. in case of finally clauses).
3379

3380 3381
- The pdb command "source" has been added.  It displays the source code for a
  given object, if possible.
3382

3383 3384
- The pdb command "longlist" has been added.  It displays the whole source code
  for the current function.
3385

3386 3387
- Issue #1503502: Make pdb.Pdb easier to subclass by putting message and error
  output into methods.
3388

3389 3390
- Issue #809887: Make the output of pdb's breakpoint deletions more consistent;
  emit a message when a breakpoint is enabled or disabled.
3391

3392 3393
- Issue #5294: Fix the behavior of pdb's "continue" command when called in the
  top-level debugged frame.
3394

3395 3396
- Issue #5727: Restore the ability to use readline when calling into pdb in
  doctests.
3397

3398 3399
- Issue #6719: In pdb, do not stop somewhere in the encodings machinery if the
  source file to be debugged is in a non-builtin encoding.
3400

3401 3402
- Issue #8048: Prevent doctests from failing when sys.displayhook has been
  reassigned.
3403

3404 3405
- Issue #8015: In pdb, do not crash when an empty line is entered as a
  breakpoint command.
3406

3407 3408
- In pdb, allow giving a line number to the "until" command.

3409 3410 3411
- Issue #1437051: For pdb, allow "continue" and related commands in .pdbrc
  files.  Also, add a command-line option "-c" that runs a command as if given
  in .pdbrc.
3412

3413 3414
- Issue #4179: In pdb, allow "list ." as a command to return to the currently
  debugged line.
3415

3416
- Issue #4108: In urllib.robotparser, if there are multiple ``User-agent: *``
3417 3418
  entries, consider the first one.

3419 3420 3421
- Issue #6630: Allow customizing regex flags when subclassing the
  string.Template class.

3422 3423
- Issue #9411: Allow specifying an encoding for config files in the configparser
  module.
3424

3425 3426
- Issue #1682942: Improvements to configparser: support alternate delimiters,
  alternate comment prefixes and empty lines in values.
3427

3428 3429
- Issue #9354: Provide getsockopt() in asyncore's file_wrapper.

3430 3431
- Issue #8966: ctypes: Remove implicit bytes-unicode conversion.

3432 3433
- Issue #9378: python -m pickle <pickle file> will now load and display the
  first object in the pickle file.
3434

3435
- Issue #4770: Restrict binascii module to accept only bytes (as specified).
3436 3437
  And fix the email package to encode to ASCII instead of ``raw-unicode-escape``
  before ASCII-to-binary decoding.
3438

3439
- Issue #9384: ``python -m tkinter`` will now display a simple demo applet.
3440

3441 3442
- The default size of the re module's compiled regular expression cache has been
  increased from 100 to 500 and the cache replacement policy has changed from
Antoine Pitrou's avatar
Antoine Pitrou committed
3443 3444
  simply clearing the entire cache on overflow to forgetting the least recently
  used cached compiled regular expressions.  This is a performance win for
3445 3446
  applications that use a lot of regular expressions and limits the impact of
  the performance hit anytime the cache is exceeded.
3447

3448 3449
- Issue #7113: Speed up loading in configparser. Patch by Łukasz Langa.

3450
- Issue #9032: XML-RPC client retries the request on EPIPE error.  The EPIPE
3451 3452 3453
  error occurs when the server closes the socket and the client sends a big
  XML-RPC request.

3454 3455 3456
- Issue #4629: getopt raises an error if an argument ends with "=", whereas
  getopt doesn't accept a value (eg. --help= is rejected if getopt uses
  ['help='] long options).
3457

3458 3459 3460 3461 3462 3463
- Issue #7989: Added pure python implementation of the `datetime` module.  The C
  module is renamed to `_datetime` and if available, overrides all classes
  defined in datetime with fast C impementation.  Python implementation is based
  on the original python prototype for the datetime module by Tim Peters with
  minor modifications by the PyPy project.  The test suite now tests `datetime`
  module with and without `_datetime` acceleration using the same test cases.
3464

3465
- Issue #7895: platform.mac_ver() no longer crashes after calling os.fork().
3466

3467 3468
- Issue #9323: Fixed a bug in trace.py that resulted in loosing the name of the
  script being traced.  Patch by Eli Bendersky.
3469

3470 3471
- Issue #9282: Fixed --listfuncs option of trace.py.  Thanks Eli Bendersky for
  the patch.
3472

3473 3474 3475
- Issue #3704: http.cookiejar was not properly handling URLs with a / in the
  parameters.

3476 3477
- Issue #9268: ``pickletools.dis()`` now has an optional *annotate* argument
  which controls printing of opcode descriptions in ``dis()`` output.
3478

3479 3480
- Issue #1555570: email no longer inserts extra blank lines when a \r\n combo
  crosses an 8192 byte boundary.
3481

3482 3483
- Issue #9243: Fix sndhdr module and add unit tests, contributed by James Lee.

Benjamin Peterson's avatar
Benjamin Peterson committed
3484 3485
- ``ast.literal_eval()`` now allows byte literals.

3486 3487
- Issue #9137: Fix issue in MutableMapping.update, which incorrectly treated
  keyword arguments called 'self' or 'other' specially.
3488

3489 3490 3491
- ``ast.literal_eval()`` now allows set literals.

- Issue #9164: Ensure that sysconfig handles duplicate -arch flags in CFLAGS.
Ronald Oussoren's avatar
Ronald Oussoren committed
3492

3493 3494
- Issue #7646: The fnmatch pattern cache no longer grows without bound.

3495 3496 3497
- Issue #9136: Fix 'dictionary changed size during iteration' RuntimeError
  produced when profiling the decimal module.  This was due to a dangerous
  iteration over 'locals()' in Context.__init__.
3498

3499 3500 3501
- Fix extreme speed issue in Decimal.pow when the base is an exact power of 10
  and the exponent is tiny (for example, ``Decimal(10) **
  Decimal('1e-999999999')``).
3502

3503 3504
- Issue #9186: Fix math.log1p(-1.0) to raise ValueError, not OverflowError.

3505 3506
- Issue #9130: Fix validation of relative imports in parser module.

3507 3508
- Issue #9128: Fix validation of class decorators in parser module.

3509 3510 3511
- Issue #9094: python -m pickletools will now disassemble pickle files listed in
  the command line arguments.  See output of python -m pickletools -h for more
  details.
3512

3513 3514 3515
- Issue #5468: urlencode to handle bytes type and other encodings in its query
  parameter. Patch by Dan Mahn.

3516 3517
- Issue #7673: Fix security vulnerability (CVE-2010-2089) in the audioop module,
  ensure that the input string length is a multiple of the frame size.
3518

3519 3520
- Issue #6507: Accept source strings in dis.dis().  Original patch by Daniel
  Urban.
3521

3522 3523 3524
- Issue #7829: Clearly document that the dis module is exposing an
  implementation detail that is not stable between Python VMs or releases.

3525
- Issue #6589: cleanup asyncore.socket_map in case smtpd.SMTPServer constructor
3526 3527
  raises an exception.

3528
- Issue #9110: Addition of ContextDecorator to contextlib, for creating APIs
3529 3530
  that act as both context managers and decorators. contextmanager changes to
  use ContextDecorator.
3531

3532 3533 3534
- Implement importlib.abc.SourceLoader and deprecate PyLoader and PyPycLoader
  for removal in Python 3.4.

3535 3536
- Issue #9064: pdb's "up" and "down" commands now accept an optional argument
  giving the number of frames to go.
3537

3538 3539
- Issue #9018: os.path.normcase() now raises a TypeError if the argument is not
  ``str`` or ``bytes``.
3540

3541 3542
- Issue #9075: In the ssl module, remove the setting of a ``debug`` flag on an
  OpenSSL structure.
3543

3544 3545
- Issue #8682: The ssl module now temporary increments the reference count of a
  socket object got through ``PyWeakref_GetObject``, so as to avoid possible
3546 3547
  deallocation while the object is still being used.

3548
- Issue #1368368: FancyURLOpener class changed to throw an Exception on wrong
3549
  password instead of presenting an interactive prompt.  Older behavior can be
3550 3551
  obtained by passing retry=True to http_error_xxx methods of FancyURLOpener.

3552
- Issue #8720: Fix regression caused by fix for #4050 by making getsourcefile
3553 3554
  smart enough to find source files in the linecache.

3555 3556
- Issue #5610: feedparser no longer eats extra characters at the end of a body
  part if the body part ends with a ``\r\n``.
3557

3558 3559
- Issue #8986: math.erfc was incorrectly raising OverflowError for values
  between -27.3 and -30.0 on some platforms.
3560

3561 3562
- Issue #8784: Set tarfile default encoding to 'utf-8' on Windows.

3563 3564 3565
- Issue #8966: If a ctypes structure field is an array of c_char, convert its
  value to bytes instead of str (as done for c_char and c_char_p).

3566 3567 3568 3569 3570
- Issue #8188: Comparisons between Decimal and Fraction objects are now
  permitted, returning a result based on the exact numerical values of the
  operands.  This builds on issue #2531, which allowed Decimal-to-float
  comparisons; all comparisons involving numeric types (bool, int, float,
  complex, Decimal, Fraction) should now act as expected.
3571

3572 3573
- Issue #8897: Fix sunau module, use bytes to write the header. Patch written by
  Thomas Jollans.
3574

Raymond Hettinger's avatar
Nits  
Raymond Hettinger committed
3575
- Issue #8899: time.struct_time now has class and attribute docstrings.
3576

3577 3578
- Issue #6470: Drop UNC prefix in FixTk.

3579 3580
- Issue #4768: base64 encoded email body parts were incorrectly stored as binary
  strings.  They are now correctly converted to strings.
3581

3582 3583 3584
- Issue #8833: tarfile created hard link entries with a size field != 0 by
  mistake.

3585 3586
- Charset.body_encode now correctly handles base64 encoding by encoding with the
  output_charset before calling base64mime.encode.  Passes the tests from 2.x
3587
  issue #1368247.
3588

3589 3590 3591
- Issue #8845: sqlite3 Connection objects now have a read-only in_transaction
  attribute that is True iff there are uncommitted changes.

3592 3593 3594
- Issue #1289118: datetime.timedelta objects can now be multiplied by float and
  divided by float and int objects.  Results are rounded to the nearest multiple
  of timedelta.resolution with ties resolved using round-half-to-even method.
3595

3596 3597 3598
- Issue #7150: Raise OverflowError if the result of adding or subtracting
  timedelta from date or datetime falls outside of the MINYEAR:MAXYEAR range.

3599 3600
- Issue #8806: add SSL contexts support to ftplib.

3601 3602
- Issue #4769: Fix main() function of the base64 module, use sys.stdin.buffer
  and sys.stdout.buffer (instead of sys.stdin and sys.stdout) to use the bytes
3603
  API.
3604

3605 3606
- Issue #8770: Now sysconfig displays information when it's called as a script.
  Initial idea by Sridhar Ratnakumar.
3607

3608
- Issue #6662: Fix parsing of malformatted charref (&#bad;), patch written by
3609
  Fredrik Håård.
3610

3611
- Issue #8540: Decimal module: rename the Context._clamp attribute to
3612 3613
  Context.clamp and make it public.  This is useful in creating contexts that
  correspond to the decimal interchange formats specified in IEEE 754.
3614

3615 3616 3617
- Issue #6268: Fix seek() method of codecs.open(), don't read or write the BOM
  twice after seek(0). Fix also reset() method of codecs, UTF-16, UTF-32 and
  StreamWriter classes.
3618

3619
- Issue #3798: sys.exit(message) writes the message to sys.stderr file, instead
3620
  of the C file stderr, to use stderr encoding and error handler.
3621

3622 3623 3624
- Issue #8782: Add a trailing newline in linecache.updatecache to the last line
  of files without one.

3625 3626 3627
- Issue #8729: Return NotImplemented from collections.Mapping.__eq__ when
  comparing to a non-mapping.

3628
- Issue #8774: tabnanny uses the encoding cookie (#coding:...) to use the
3629
  correct encoding.
3630

3631 3632 3633
- Issue #4870: Add an `options` attribute to SSL contexts, as well as several
  ``OP_*`` constants to the `ssl` module.  This allows to selectively disable
  protocol versions, when used in combination with `PROTOCOL_SSLv23`.
3634

3635 3636
- Issue #8759: Fixed user paths in sysconfig for posix and os2 schemes.

3637 3638 3639 3640
- Issue #8663: distutils.log emulates backslashreplace error handler. Fix
  compilation in a non-ASCII directory if stdout encoding is ASCII (eg. if
  stdout is not a TTY).

3641 3642 3643 3644 3645
- Issue #8513: os.get_exec_path() supports b'PATH' key and bytes value.
  subprocess.Popen() and os._execvpe() support bytes program name. Add
  os.supports_bytes_environ flag: True if the native OS type of the environment
  is bytes (eg. False on Windows).

3646 3647 3648
- Issue #8633: tarfile is now able to read and write archives with "raw" binary
  pax headers as described in POSIX.1-2008.

3649 3650 3651
- Issue #1285086: Speed up urllib.parse functions: quote, quote_from_bytes,
  unquote, unquote_to_bytes.

3652 3653
- Issue #8688: Distutils now recalculates MANIFEST everytime.

3654
- Issue #8477: ssl.RAND_egd() and ssl._test_decode_cert() support str with
3655
  surrogates and bytes for the filename.
3656

3657 3658
- Issue #8550: Add first class ``SSLContext`` objects to the ssl module.

3659 3660
- Issue #8681: Make the zlib module's error messages more informative when the
  zlib itself doesn't give any detailed explanation.
3661

3662 3663
- The audioop module now supports sound fragments of length greater than 2**31
  bytes on 64-bit machines, and is PY_SSIZE_T_CLEAN.
3664

3665 3666 3667
- Issue #4972: Add support for the context manager protocol to the ftplib.FTP
  class.

Benjamin Peterson's avatar
Benjamin Peterson committed
3668 3669 3670
- Issue #8664: In py_compile, create __pycache__ when the compiled path is
  given.

3671 3672 3673
- Issue #8514: Add os.fsencode() function (Unix only): encode a string to bytes
  for use in the file system, environment variables or the command line.

3674 3675
- Issue #8571: Fix an internal error when compressing or decompressing a chunk
  larger than 1GB with the zlib module's compressor and decompressor objects.
3676

Benjamin Peterson's avatar
Benjamin Peterson committed
3677 3678 3679 3680
- Issue #8603: Support bytes environmental variables on Unix: Add os.environb
  mapping and os.getenvb() function. os.unsetenv() encodes str argument to the
  file system encoding with the surrogateescape error handler (instead of
  utf8/strict) and accepts bytes. posix.environ keys and values are now bytes.
3681

3682 3683
- Issue #8573: asyncore _strerror() function might throw ValueError.

3684 3685 3686 3687
- Issue #8483: asyncore.dispatcher's __getattr__ method produced confusing error
  messages when accessing undefined class attributes because of the cheap
  inheritance with the underlying socket object.  The cheap inheritance has been
  deprecated.
3688

3689 3690 3691
- Issue #4265: shutil.copyfile() was leaking file descriptors when disk fills.
  Patch by Tres Seaver.

3692
- Issue #8390: tarfile uses surrogateescape as the default error handler
3693
  (instead of replace in read mode or strict in write mode).
3694

3695 3696
- Issue #7755: Use an unencumbered audio file for tests.

3697 3698
- Issue #8621: uuid.uuid4() returned the same sequence of values in the parent
  and any children created using ``os.fork`` on MacOS X 10.6.
3699

3700 3701 3702 3703 3704
- Issue #8567: Fix precedence of signals in Decimal module: when a Decimal
  operation raises multiple signals and more than one of those signals is
  trapped, the specification determines the order in which the signals should be
  handled.  In many cases this order wasn't being followed, leading to the wrong
  Python exception being raised.
3705

3706
- Issue #7865: The close() method of :mod:`io` objects should not swallow
3707 3708
  exceptions raised by the implicit flush().  Also qensure that calling close()
  several times is supported.  Patch by Pascal Chambon.
3709

3710 3711 3712
- Issue #4687: Fix accuracy of garbage collection runtimes displayed with
  gc.DEBUG_STATS.

3713 3714
- Issue #8354: The siginterrupt setting is now preserved for all signals, not
  just SIGCHLD.
3715

3716
- Issue #7192: webbrowser.get("firefox") now works on Mac OS X, as does
3717 3718
  webbrowser.get("safari").

3719 3720
- Issue #8464: tarfile no longer creates files with execute permissions set when
  mode="w|" is used.
3721

3722 3723
- Issue #7834: Fix connect() of Bluetooth L2CAP sockets with recent versions of
  the Linux kernel.  Patch by Yaniv Aknin.
3724

3725 3726
- Issue #8295: Added shutil.unpack_archive.

3727 3728 3729
- Issue #6312: Fixed http HEAD request when the transfer encoding is chunked.
  It should correctly return an empty response now.

3730 3731
- Issue #8546: Reject None given as the buffering argument to _pyio.open.

3732 3733 3734
- Issue #8549: Fix compiling the _ssl extension under AIX.  Patch by
  Sridhar Ratnakumar.

3735 3736 3737
- Issue #6656: fix locale.format_string to handle escaped percents
  and mappings.

3738 3739 3740 3741
- Issue #2302: Fix a race condition in SocketServer.BaseServer.shutdown, where
  the method could block indefinitely if called just before the event loop
  started running.  This also fixes the occasional freezes witnessed in
  test_httpservers.
3742

3743 3744 3745
- Issue #8524: When creating an SSL socket, the timeout value of the original
  socket wasn't retained (instead, a socket with a positive timeout would be
  turned into a non-blocking SSL socket).
3746

3747 3748 3749
- Issue #5103: SSL handshake would ignore the socket timeout and block
  indefinitely if the other end didn't respond.

3750 3751
- The do_handshake() method of SSL objects now adjusts the blocking mode of the
  SSL structure if necessary (as other methods already do).
3752

3753 3754
- Issue #8391: os.execvpe() and os.getenv() supports unicode with surrogates and
  bytes strings for environment keys and values.
3755

3756 3757
- Issue #8467: Pure Python implementation of subprocess encodes the error
  message using surrogatepass error handler to support surrogates in the
3758
  message.
3759

3760
- Issue #8468: bz2.BZ2File() accepts str with surrogates and bytes filenames.
3761

3762 3763 3764
- Issue #8451: Syslog module now uses basename(sys.argv[0]) instead of the
  string "python" as the *ident*.  openlog() arguments are all optional and
  keywords.
3765

3766 3767
- Issue #8108: Fix the unwrap() method of SSL objects when the socket has a
  non-infinite timeout.  Also make that method friendlier with applications
3768 3769 3770
  wanting to continue using the socket in clear-text mode, by disabling
  OpenSSL's internal readahead.  Thanks to Darryl Miles for guidance.

3771 3772 3773
- Issue #8496: make mailcap.lookup() always return a list, rather than an
  iterator.  Patch by Gregory Nofi.

3774 3775 3776
- Issue #8195: Fix a crash in sqlite Connection.create_collation() if the
  collation name contains a surrogate character.

3777 3778 3779
- Issue #8484: Load all ciphers and digest algorithms when initializing the _ssl
  extension, such that verification of some SSL certificates doesn't fail
  because of an "unknown algorithm".
3780

3781 3782
- Issue #6547: Added the ignore_dangling_symlinks option to shutil.copytree.

3783
- Issue #1540112: Now allowing the choice of a copy function in shutil.copytree.
3784

3785 3786 3787
- Issue #4814: timeout parameter is now applied also for connections resulting
  from PORT/EPRT commands.

3788 3789
- Issue #8463: added missing reference to bztar in shutil's documentation.

3790 3791
- Issue #7154: urllib.request can now detect the proxy settings on OSX 10.6 (as
  long as the user didn't specify 'automatic proxy configuration').
3792

3793 3794
- Issue #3817: ftplib.FTP.abort() method now considers 225 a valid response code
  as stated in RFC-959 at chapter 5.4.
3795

3796 3797 3798
- Issue #8394: _ctypes.dlopen() accepts bytes, bytearray and str with
  surrogates.

3799
- Issue #850728: Add a *timeout* parameter to the `acquire()` method of
Antoine Pitrou's avatar
Antoine Pitrou committed
3800
  `threading.Semaphore` objects.  Original patch by Torsten Landschoff.
3801

3802 3803 3804
- Issue #8322: Add a *ciphers* argument to SSL sockets, so as to change the
  available cipher list.  Helps fix test_ssl with OpenSSL 1.0.0.

3805 3806 3807
- Issue #8393: subprocess accepts bytes, bytearray and str with surrogates for
  the current working directory.

3808
- Issue #7606: XML-RPC traceback stored in X-traceback is now encoded to ASCII
3809
  using backslashreplace error handler.
3810

3811
- Issue #8412: os.system() now accepts bytes, bytearray and str with surrogates.
3812

3813 3814 3815
- Issue #2987: RFC2732 support for urlparse (IPv6 addresses). Patch by Tony
  Locke and Hans Ulrich Niedermann.

3816 3817
- Issue #5277: Fix quote counting when parsing RFC 2231 encoded parameters.

3818
- Issue #7316: The acquire() method of lock objects in the :mod:`threading`
3819
  module now takes an optional timeout argument in seconds.  Timeout support
3820
  relies on the system threading library, so as to avoid a semi-busy wait loop.
3821

3822 3823
- Issue #8383: pickle and pickletools use surrogatepass error handler when
  encoding unicode as utf8 to support lone surrogates and stay compatible with
3824
  Python 2.x and 3.x.
3825

3826
- Issue #7585: difflib context and unified diffs now place a tab between
3827 3828
  filename and date, conforming to the 'standards' they were originally designed
  to follow.  This improves compatibility with patch tools.
3829

3830
- Issue #7472: Fixed typo in email.encoders module; messages using ISO-2022
3831 3832
  character sets will now consistently use a Content-Transfer-Encoding of 7bit
  rather than sometimes being marked as 8bit.
3833

3834 3835 3836
- Issue #8375: test_distutils now checks if the temporary directory are still
  present before it cleans them.

3837 3838
- Issue #8374: Update the internal alias table in the :mod:`locale` module to
  cover recent locale changes and additions.
3839

3840
- Issue #8321: Give access to OpenSSL version numbers from the `ssl` module,
3841 3842
  using the new attributes `ssl.OPENSSL_VERSION`, `ssl.OPENSSL_VERSION_INFO` and
  `ssl.OPENSSL_VERSION_NUMBER`.
3843

3844 3845
- Add functools.total_ordering() and functools.cmp_to_key().

3846 3847
- Issue #8257: The Decimal construct now accepts a float instance directly,
  converting that float to a Decimal of equal value:
3848 3849 3850 3851

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

3852 3853
- Issue #8294: The Fraction constructor now accepts Decimal and float instances
  directly.
3854

3855 3856 3857 3858
- Issue #7279: Comparisons involving a Decimal signaling NaN now signal
  InvalidOperation instead of returning False.  (Comparisons involving a quiet
  NaN are unchanged.)  Also, Decimal quiet NaNs are now hashable; Decimal
  signaling NaNs remain unhashable.
3859

3860 3861 3862 3863 3864
- Issue #2531: Comparison operations between floats and Decimal instances now
  return a result based on the numeric values of the operands; previously they
  returned an arbitrary result based on the relative ordering of id(float) and
  id(Decimal).  See also issue #8188, which adds Decimal-to-Fraction
  comparisons.
3865

3866 3867
- Added a subtract() method to collections.Counter().

3868
- Issue #8233: When run as a script, py_compile.py optionally takes a single
3869 3870 3871
  argument `-` which tells it to read files to compile from stdin.  Each line is
  read on demand and the named file is compiled immediately.  (Original patch by
  Piotr Ożarowski).
3872

3873 3874
- Backwards incompatible change: Unicode codepoints line tabulation (0x0B) and
  form feed (0x0C) are now considered linebreaks, as specified in Unicode
3875
  Standard Annex #14.  See issue #7643.  http://www.unicode.org/reports/tr14/
3876

3877 3878 3879 3880
- Comparisons using one of <, <=, >, >= between a complex instance and a
  Fractions instance now raise TypeError instead of returning True/False.  This
  makes Fraction <=> complex comparisons consistent with int <=> complex, float
  <=> complex, and complex <=> complex comparisons.
3881

3882 3883 3884
- Issue #8139: ossaudiodev didn't initialize its types properly, therefore some
  methods (such as oss_mixer_device.fileno()) were not available.  Initial patch
  by Bertrand Janin.
3885

3886 3887 3888
- Issue #8205: Remove the "Modules" directory from sys.path when Python is
  running from the build directory (POSIX only).

3889
- Issue #7512: shutil.copystat() could raise an OSError when the filesystem
3890 3891
  didn't support chflags() (for example ZFS under FreeBSD).  The error is now
  silenced.
3892

3893 3894
- Issue #7860: platform.uname now reports the correct 'machine' type when Python
  is running in WOW64 mode on 64 bit Windows.
3895

Antoine Pitrou's avatar
Antoine Pitrou committed
3896 3897 3898
- Issue #3890, #8222: Fix recv() and recv_into() on non-blocking SSL sockets.
  Also, enable the SSL_MODE_AUTO_RETRY flag on SSL sockets, so that blocking
  reads and writes are always retried by OpenSSL itself.
3899

3900 3901 3902 3903
- Issue #4282: Fix the main function of the profile module for a non-ASCII
  script, open the file in binary mode and not in text mode with the default
  (utf8) encoding.

3904 3905
- Issue #8179: Fix macpath.realpath() on a non-existing path.

3906 3907
- Issue #8024: Update the Unicode database to 5.2.

3908 3909
- Issue #8168: py_compile now handles files with utf-8 BOMS.

3910 3911 3912
- ``tokenize.detect_encoding`` now returns ``'utf-8-sig'`` when a UTF-8 BOM is
  detected.

3913 3914
- Issue #6716/2: Backslash-replace error output in compilall.

3915 3916 3917
- Issue #4961: Inconsistent/wrong result of askyesno function in tkMessageBox
  with Tcl/Tk-8.5.

3918
- Issue #8140: extend compileall to compile single files.  Add -i option.
3919

3920 3921
- Issue #7356: ctypes.util: Make parsing of ldconfig output independent of the
  locale.
3922

3923 3924 3925
- The internals of the subprocess module on POSIX systems have been replaced by
  an extension module (_posixsubprocess) so that the fork()+exec() can be done
  safely without the possibility of deadlock in multithreaded applications.
3926

3927 3928 3929 3930
- subprocess.Popen now has restore_signals and start_new_session features.  The
  default of restore_signals=True is a new behavior compared to earlier Python
  versions.  This means that signals such as SIGPIPE are not ignored by default
  in subprocesses launched by Python (Issue #1652).
3931

3932 3933 3934
- Issue #6472: The xml.etree package is updated to ElementTree 1.3.  The
  cElementTree module is updated too.

3935
- Issue #7774: Set sys.executable to an empty string if argv[0] has been set to
3936 3937
  an non existent program name and Python is unable to retrieve the real program
  name.
3938

3939 3940
- Issue #7880: Fix sysconfig when the python executable is a symbolic link.

3941 3942
- Issue #6509: fix re.sub to work properly when the pattern, the string, and the
  replacement were all bytes.  Patch by Antoine Pitrou.
3943

3944 3945 3946
- The sqlite3 module was updated to pysqlite 2.6.0. This fixes several obscure
  bugs and allows loading SQLite extensions from shared libraries.

3947 3948
- Issue #1054943: Fix ``unicodedata.normalize('NFC', text)`` for the Public
  Review Issue #29 (http://unicode.org/review/pr-29.html).
3949

3950 3951 3952
- Issue #7494: fix a crash in _lsprof (cProfile) after clearing the profiler,
  reset also the pointer to the current pointer context.

3953 3954 3955
- Issue #7232: Add support for the context manager protocol to the TarFile
  class.

3956 3957 3958
- Issue #7250: Fix info leak of os.environ across multi-run uses of
  wsgiref.handlers.CGIHandler.

3959 3960
- Issue #1729305: Fix doctest to handle encode error with "backslashreplace".

3961 3962 3963
- Issue #691291: codecs.open() should not convert end of lines on reading and
  writing.

3964 3965 3966 3967 3968 3969
- Issue #7869: logging: improved diagnostic for format-time errors.

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

- logging: Implemented PEP 391.

3970
- Issue #1537721: Add a writeheader() method to csv.DictWriter.
Benjamin Peterson's avatar
Benjamin Peterson committed
3971

3972 3973
- Issue #7959: ctypes callback functions are now registered correctly with the
  cycle garbage collector.
3974

3975 3976
- Issue #5801: removed spurious empty lines in wsgiref.

3977 3978
- Issue #6666: fix bug in trace.py that applied the list of directories to be
  ignored only to the first file.  Noted by Bogdan Opanchuk.
3979

3980 3981
- Issue #7597: curses.use_env() can now be called before initscr().  Noted by
  Kan-Ru Chen.
3982

3983 3984
- Issue #7310: fix the __repr__ of os.environ to show the environment variables.

3985 3986 3987
- Issue #7970: email.Generator.flatten now correctly flattens message/rfc822
  messages parsed by email.Parser.HeaderParser.

Brett Cannon's avatar
Brett Cannon committed
3988 3989 3990
- Issue #7361: Importlib was not properly checking the number of bytes in
  bytecode file when it was less then 8 bytes.

3991 3992 3993 3994
- Issue #7633: In the decimal module, Context class methods (with the exception
  of canonical and is_canonical) now accept instances of int and long wherever a
  Decimal instance is accepted, and implicitly convert that argument to Decimal.
  Previously only some arguments were converted.
3995

3996 3997 3998
- Issue #7835: shelve should no longer produce mysterious warnings during
  interpreter shutdown.

3999 4000 4001 4002
- Issue #2746: Don't escape ampersands and angle brackets ("&", "<", ">") in XML
  processing instructions and comments.  These raw characters are allowed by the
  XML specification, and are necessary when outputting e.g.  PHP code in a
  processing instruction.  Patch by Neil Muller.
4003

4004 4005 4006
- Issue #6233: ElementTree failed converting unicode characters to XML entities
  when they could't be represented in the requested output encoding.  Patch by
  Jerry Chen.
4007

4008 4009
- Issue #6003: add an argument to ``zipfile.Zipfile.writestr`` to specify the
  compression type.
4010

4011 4012
- Issue #4772: Raise a ValueError when an unknown Bluetooth protocol is
  specified, rather than fall through to AF_PACKET (in the `socket` module).
4013 4014
  Also, raise ValueError rather than TypeError when an unknown TIPC address type
  is specified.  Patch by Brian Curtin.
4015

4016 4017 4018
- Issue #6939: Fix file I/O objects in the `io` module to keep the original file
  position when calling `truncate()`.  It would previously change the file
  position to the given argument, which goes against the tradition of
4019 4020
  ftruncate() and other truncation APIs.  Patch by Pascal Chambon.

4021
- Issue #7610: Reworked implementation of the internal
4022 4023 4024 4025 4026
  :class:`zipfile.ZipExtFile` class used to represent files stored inside an
  archive.  The new implementation is significantly faster and can be wrapped in
  a :class:`io.BufferedReader` object for more speedups.  It also solves an
  issue where interleaved calls to `read()` and `readline()` give wrong results.
  Patch by Nir Aides.
4027

4028
- Issue #6963: Added "maxtasksperchild" argument to multiprocessing.Pool,
4029 4030
  allowing for a maximum number of tasks within the pool to be completed by the
  worker before that worker is terminated, and a new one created to replace it.
4031

4032 4033
- Issue #7792: Registering non-classes to ABCs raised an obscure error.

Benjamin Peterson's avatar
Benjamin Peterson committed
4034
- Issue #7785: Don't accept bytes in FileIO.write().
4035

4036 4037
- Removed the functions 'verify' and 'vereq' from Lib/test/support.py.

4038 4039 4040
- Issue #7773: Fix an UnboundLocalError in platform.linux_distribution() when
  the release file is empty.

4041 4042 4043
- Issue #7561: Fix crashes when using bytearray objects with the posix
  module.

4044 4045 4046
- Issue #1670765: Prevent email.generator.Generator from re-wrapping headers in
  multipart/signed MIME parts, which fixes one of the sources of invalid
  modifications to such parts by Generator.
4047

4048 4049
- Issue #7703: Add support for the new buffer API to `binascii.a2bhqx`.  Patch
  by Florent Xicluna, along with some additional tests.
4050

4051 4052
- Issue #7701: Fix crash in binascii.b2a_uu() in debug mode when given a 1-byte
  argument.  Patch by Victor Stinner.
4053

4054 4055
- Issue #3299: Fix possible crash in the _sre module when given bad argument
  values in debug mode.  Patch by Victor Stinner.
4056

4057 4058
- Issue #2846: Add support for gzip.GzipFile reading zero-padded files.  Patch
  by Brian Curtin.
4059

4060 4061
- Issue #7681: Use floor division in appropiate places in the wave module.

4062 4063 4064 4065
- Issue #5372: Drop the reuse of .o files in Distutils' ccompiler (since
  Extension extra options may change the output without changing the .c
  file). Initial patch by Collin Winter.

4066 4067
- Issue #7617: Make sure distutils.unixccompiler.UnixCCompiler recognizes gcc
  when it has a fully qualified configuration prefix. Initial patch by Arfrever.
4068

4069 4070
- Issue #7105: Make WeakKeyDictionary and WeakValueDictionary robust against the
  destruction of weakref'ed objects while iterating.
4071

4072 4073
- Issue #7455: Fix possible crash in cPickle on invalid input.  Patch by Victor
  Stinner.
4074

4075
- Issue #1628205: Socket file objects returned by socket.socket.makefile() now
4076 4077
  properly handles EINTR within the read, readline, write & flush methods.  The
  socket.sendall() method now properly handles interrupted system calls.
4078

4079 4080 4081
- Issue #7471: Improve the performance of GzipFile's buffering mechanism, and
  make it implement the `io.BufferedIOBase` ABC to allow for further speedups by
  wrapping it in an `io.BufferedReader`.  Patch by Nir Aides.
4082 4083

- Issue #3972: http.client.HTTPConnection now accepts an optional source_address
4084 4085 4086 4087
  parameter to allow specifying where your connections come from.

- socket.create_connection now accepts an optional source_address parameter.

4088 4089
- Issue #5511: now zipfile.ZipFile can be used as a context manager.  Initial
  patch by Brian Curtin.
4090

4091 4092 4093
- Issue #7556: Make sure Distutils' msvc9compile reads and writes the MSVC XML
  Manifest file in text mode so string patterns can be used in regular
  expressions.
4094

4095 4096 4097
- Issue #7552: Removed line feed in the base64 Authorization header in the
  Distutils upload command to avoid an error when PyPI reads it.  This occurs on
  long passwords. Initial patch by JP St. Pierre.
4098

4099 4100 4101
- Issue #7231: urllib2 cannot handle https with proxy requiring auth.  Patch by
  Tatsuhiro Tsujikawa.

4102 4103 4104
- Issue #4757: `zlib.compress` and other methods in the zlib module now raise a
  TypeError when given an `str` object (rather than a `bytes`-like object).
  Patch by Victor Stinner and Florent Xicluna.
4105

4106 4107 4108 4109
- Issue #7349: Make methods of file objects in the io module accept None as an
  argument where file-like objects (ie StringIO and BytesIO) accept them to mean
  the same as passing no argument.

4110
- Issue #7357: tarfile no longer suppresses fatal extraction errors by default.
4111

4112 4113
- Issue #5949: added check for correct lineends in input from IMAP server in
  imaplib.
4114

4115
- Add count() and reverse() methods to collections.deque().
4116

4117 4118
- Fix variations of extending deques:  d.extend(d)  d.extendleft(d)  d+=d

4119 4120
- Issue #6986: Fix crash in the JSON C accelerator when called with the wrong
  parameter types.  Patch by Victor Stinner.
4121

4122
- Issue #7457: added a read_pkg_file method to
4123 4124
  distutils.dist.DistributionMetadata.

4125 4126 4127
- logging: Added optional `secure` parameter to SMTPHandler, to enable use of
  TLS with authentication credentials.

4128 4129
- Issue #1923: Fixed the removal of meaningful spaces when PKG-INFO is generated
  in Distutils.  Patch by Stephen Emslie.
4130

4131 4132 4133
- Issue #4120: Drop reference to CRT from manifest when building extensions with
  msvc9compiler.

4134
- Issue #7333: The `posix` module gains an `initgroups()` function providing
4135 4136
  access to the initgroups(3) C library call on Unix systems which implement it.
  Patch by Jean-Paul Calderone.
4137

4138 4139 4140 4141
- Issue #7408: Fixed distutils.tests.sdist so it doesn't check for group
  ownership when the group is not forced, because the group may be different
  from the user's group and inherit from its container when the test is run.

4142
- Issue #4486: When an exception has an explicit cause, do not print its
4143 4144
  implicit context too.  This affects the `traceback` module as well as built-in
  exception printing.
4145

4146 4147
- Issue #1515: Enable use of deepcopy() with instance methods.  Patch by Robert
  Collins.
4148

4149 4150
- Issue #7403: logging: Fixed possible race condition in lock creation.

4151 4152 4153 4154
- Issue #6845: Add restart support for binary upload in ftplib.  The
  `storbinary()` method of FTP and FTP_TLS objects gains an optional `rest`
  argument.  Patch by Pablo Mouzo.

4155 4156 4157
- Issue #5788: `datetime.timedelta` objects get a new `total_seconds()` method
  returning the total number of seconds in the duration.  Patch by Brian
  Quinlan.
4158

4159 4160
- Issue #7133: SSL objects now support the new buffer API.

4161
- Issue #1488943: difflib.Differ() doesn't always add hints for tab characters.
4162

4163 4164 4165
- Issue #6123: tarfile now opens empty archives correctly and consistently
  raises ReadError on empty files.

4166
- Issue #7354: distutils.tests.test_msvc9compiler - dragfullwindows can be 2.
4167

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Benjamin Peterson committed
4168 4169
- Issue #5037: Proxy the __bytes__ special method instead to __bytes__ instead
  of __str__.
4170

4171 4172
- Issue #7341: Close the internal file object in the TarFile constructor in case
  of an error.
4173

4174 4175 4176
- Issue #7293: distutils.test_msvc9compiler is fixed to work on any fresh
  Windows box. Help provided by David Bolen.

4177 4178
- Issue #2054: ftplib now provides an FTP_TLS class to do secure FTP using TLS
  or SSL.  Patch by Giampaolo Rodola'.
4179

4180
- Issue #7328: pydoc no longer corrupts sys.path when run with the '-m' switch.
4181

4182 4183
- Issue #4969: The mimetypes module now reads the MIME database from the
  registry under Windows.  Patch by Gabriel Genellina.
4184

4185 4186 4187 4188
- Issue #6816: runpy now provides a run_path function that allows Python code to
  execute file paths that refer to source or compiled Python files as well as
  zipfiles, directories and other valid sys.path entries that contain a
  __main__.py file.  This allows applications that run other Python scripts to
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Nick Coghlan committed
4189 4190
  support the same flexibility as the CPython command line itself.

4191 4192 4193
- Issue #7318: multiprocessing now uses a timeout when it fails to establish a
  connection with another process, rather than looping endlessly.  The default
  timeout is 20 seconds, which should be amply sufficient for local connections.
4194

4195
- Issue #7197: Allow unittest.TextTestRunner objects to be pickled and
4196
  unpickled.  This fixes crashes under Windows when trying to run
4197 4198
  test_multiprocessing in verbose mode.

4199 4200 4201
- Issue #7893: ``unittest.TextTestResult`` is made public and a ``resultclass``
  argument added to the TextTestRunner constructor allowing a different result
  class to be used without having to subclass.
4202

4203
- Issue #7588: ``unittest.TextTestResult.getDescription`` now includes the test
4204 4205
  name in failure reports even if the test has a docstring.

4206
- Issue #3001: Add a C implementation of recursive locks which is used by
4207 4208 4209
  default when instantiating a `threading.RLock` object. This makes recursive
  locks as fast as regular non-recursive locks (previously, they were slower by
  10x to 15x).
4210

4211 4212
- Issue #7282: Fix a memory leak when an RLock was used in a thread other than
  those started through `threading.Thread` (for example, using
4213 4214
  `_thread.start_new_thread()`).

4215 4216 4217
- Issue #7187: Importlib would not silence the IOError raised when trying to
  write new bytecode when it was made read-only.

4218 4219 4220
- Issue #7264: Fix a possible deadlock when deallocating thread-local objects
  which are part of a reference cycle.

4221 4222 4223
- Issue #7211: Allow 64-bit values for the `ident` and `data` fields of kevent
  objects on 64-bit systems.  Patch by Michael Broghton.

4224 4225 4226
- Issue #6896: mailbox.Maildir now invalidates its internal cache each time a
  modification is done through it.  This fixes inconsistencies and test failures
  on systems with slightly bogus mtime behaviour.
4227

4228 4229 4230 4231
- Issue #7246 & Issue #7208: getpass now properly flushes input before reading
  from stdin so that existing input does not confuse it and lead to incorrect
  entry or an IOError.  It also properly flushes it afterwards to avoid the
  terminal echoing the input afterwards on OSes such as Solaris.
4232

4233 4234 4235 4236
- Issue #7233: Fix a number of two-argument Decimal methods to make sure that
  they accept an int or long as the second argument.  Also fix buggy handling of
  large arguments (those with coefficient longer than the current precision) in
  shift and rotate.
4237

4238 4239 4240
- Issue #4750: Store the basename of the original filename in the gzip FNAME
  header as required by RFC 1952.

4241 4242 4243
- Issue #1180: Added a new global option to ignore ~/.pydistutils.cfg in
  Distutils.

4244 4245 4246
- Issue #7218: Fix test_site for win32, the directory comparison was done with
  an uppercase.

4247 4248 4249
- Issue #7205: Fix a possible deadlock when using a BZ2File object from
  several threads at once.

4250 4251
- Issue #7077: logging: SysLogHandler now treats Unicode as per RFC 5424.

4252 4253 4254
- Issue #7099: Decimal.is_normal now returns True for numbers with exponent
  larger than emax.

4255 4256 4257
- Issue #7080: locale.strxfrm() raises a MemoryError on 64-bit non-Windows
  platforms, and assorted locale fixes by Derk Drukker.

4258 4259
- Issue #5833: Fix extra space character in readline completion with the GNU
  readline library version 6.0.
4260

4261
- Issue #6894: Fixed the issue urllib2 doesn't respect "no_proxy" environment.
4262

4263 4264
- Issue #7086: Added TCP support to SysLogHandler, and tidied up some
  anachronisms in the code which were a relic of 1.5.2 compatibility.
4265

4266 4267
- Issue #7082: When falling back to the MIME 'name' parameter, the correct place
  to look for it is the Content-Type header.
4268

4269 4270 4271
- Make tokenize.detect_coding() normalize utf-8 and iso-8859-1 variants like the
  builtin tokenizer.

4272 4273
- Issue #7048: Force Decimal.logb to round its result when that result is too
  large to fit in the current precision.
4274

4275 4276
- Issue #6236, #6348: Fix various failures in the I/O library under AIX and
  other platforms, when using a non-gcc compiler. Patch by Derk Drukker.
4277

4278 4279
- Issue #4606: Passing 'None' if ctypes argtype is set to POINTER(...)  does now
  always result in NULL.
4280

4281 4282
- Issue #5042: Structure sub-subclass does now initialize correctly with base
  class positional arguments.
4283

4284 4285
- Issue #6882: Import uuid creates zombies processes.

4286 4287
- Issue #6635: Fix profiler printing usage message.

4288 4289
- Issue #6856: Add a filter keyword argument to TarFile.add().

4290 4291
- Issue #6888: pdb's alias command was broken when no arguments were given.

4292
- Issue #6857: Default format() alignment should be '>' for Decimal instances.
4293

4294 4295 4296
- Issue #6795: int(Decimal('nan')) now raises ValueError instead of returning
  NaN or raising InvalidContext.  Also, fix infinite recursion in
  long(Decimal('nan')).
4297

4298 4299
- Issue #6850: Fix bug in Decimal._parse_format_specifier for formats with no
  type specifier.
4300

4301 4302
- Issue #6239: ctypes.c_char_p return value must return bytes.

4303 4304 4305 4306
- Issue #6838: Use a list to accumulate the value instead of repeatedly
  concatenating strings in http.client's HTTPResponse._read_chunked providing a
  significant speed increase when downloading large files servend with a
  Transfer-Encoding of 'chunked'.
4307

4308 4309 4310
- Trying to import a submodule from a module that is not a package, ImportError
  should be raised, not AttributeError.

4311 4312 4313
- When the globals past to importlib.__import__() has __package__ set to None,
  fall back to computing what __package__ should be instead of giving up.

4314
- Raise a TypeError when the name of a module to be imported for
4315
  importlib.__import__ is not a string (was raising an AttributeError before).
4316

4317 4318
- Allow the fromlist passed into importlib.__import__ to be any iterable.

4319 4320
- Have importlib raise ImportError if None is found in sys.modules.

4321 4322
- Issue #6054: Do not normalize stored pathnames in tarfile.

4323 4324 4325
- Issue #6794: Fix Decimal.compare_total and Decimal.compare_total_mag: NaN
  payloads are now ordered by integer value rather than lexicographically.

4326 4327 4328 4329 4330 4331 4332 4333 4334
- Issue #1356969: Add missing info methods in tix.HList.

- Issue #1522587: New constants and methods for the tix.Grid widget.

- Issue #1250469: Fix the return value of tix.PanedWindow.panes.

- Issue #1119673: Do not override tkinter.Text methods when creating a
  ScrolledText.

4335 4336
- Issue #6665: Fix fnmatch to properly match filenames with newlines in them.

4337 4338
- Issue #1135: Add the XView and YView mix-ins to avoid duplicating the xview*
  and yview* methods.
4339

4340 4341 4342 4343 4344
- Issue #6629: Fix a data corruption issue in the new I/O library, which could
  occur when writing to a BufferedRandom object (e.g. a file opened in "rb+" or
  "wb+" mode) after having buffered a certain amount of data for reading. This
  bug was not present in the pure Python implementation.

4345 4346
- Issue #6622: Fix "local variable 'secret' referenced before assignment" bug in
  POP3.apop.
4347

4348 4349
- Issue #2715: Remove remnants of Carbon.File from binhex module.

4350 4351 4352
- Issue #6595: The Decimal constructor now allows arbitrary Unicode decimal
  digits in input, as recommended by the standard.  Previously it was restricted
  to accepting [0-9].
4353

4354 4355 4356
- Issue #6106: telnetlib.Telnet.process_rawq doesn't handle default WILL/WONT
  DO/DONT correctly.

4357
- Issue #1424152: Fix for http.client, urllib.request to support SSL while
4358 4359
  working through proxy.  Original patch by Christopher Li, changes made by
  Senthil Kumaran.
4360

4361
- Add importlib.abc.ExecutionLoader to represent the PEP 302 protocol for
4362 4363 4364
  loaders that allow for modules to be executed. Both importlib.abc.PyLoader and
  PyPycLoader inherit from this class and provide implementations in relation to
  other methods required by the ABCs.
4365

4366 4367 4368 4369
- importlib.abc.PyLoader did not inherit from importlib.abc.ResourceLoader like
  the documentation said it did even though the code in PyLoader relied on the
  abstract method required by ResourceLoader.

4370 4371 4372
- Issue #6431: Make Fraction type return NotImplemented when it doesn't know how
  to handle a comparison without loss of precision.  Also add correct handling
  of infinities and nans for comparisons with float.
4373

Antoine Pitrou's avatar
Antoine Pitrou committed
4374
- Issue #6415: Fixed warnings.warn segfault on bad formatted string.
4375

4376 4377
- Issue #6358: The exit status of a command started with os.popen() was reported
  differently than it did with python 2.x.
4378

4379 4380
- Issue #6323: The pdb debugger did not exit when running a script with a syntax
  error.
4381

4382 4383 4384
- Issue #3392: The subprocess communicate() method no longer fails in select()
  when file descriptors are large; communicate() now uses poll() when possible.

4385 4386
- Issue #6369: Fix an RLE decompression bug in the binhex module.

4387 4388
- Issue #6344: Fixed a crash of mmap.read() when passed a negative argument.

Benjamin Peterson's avatar
Benjamin Peterson committed
4389 4390
- The deprecated function string.maketrans has been removed.

4391 4392 4393
- Issue #4005: Fixed a crash of pydoc when there was a zip file present in
  sys.path.

4394 4395
- Issue #6218: io.StringIO and io.BytesIO instances are now picklable.

4396 4397
- The os.get_exec_path() function to return the list of directories that will be
  searched for an executable when launching a subprocess was added.
4398

4399 4400 4401
- Issue #7481: When a threading.Thread failed to start it would leave the
  instance stuck in initial state and present in threading.enumerate().

4402 4403
- Issue #1068268: The subprocess module now handles EINTR in internal os.waitpid
  and os.read system calls where appropriate.
4404

4405 4406
- Issue #6729: Added ctypes.c_ssize_t to represent ssize_t.

4407 4408
- Issue #6247: The argparse module has been added to the standard library.

4409 4410
- Issue #8235: _socket: Add the constant ``SO_SETFIB``.  SO_SETFIB is a socket
  option available on FreeBSD 7.1 and newer.
4411

4412 4413 4414
- Issue #9315: Fix for the trace module to record correct class name
  for tracing methods.

4415 4416
Extension Modules
-----------------
4417

4418 4419 4420
- Issue #9959: Tweak formula used for computing math.log of an integer,
  making it marginally more accurate for exact powers of 2.

4421 4422
- Issue #9422: Fix memory leak when re-initializing a struct.Struct object.

4423
- Issue #7900: The getgroups(2) system call on MacOSX behaves rather oddly
4424 4425 4426 4427
  compared to other unix systems. In particular, os.getgroups() does not reflect
  any changes made using os.setgroups() but basicly always returns the same
  information as the id command. os.getgroups() can now return more than 16
  groups on MacOSX.
4428

4429 4430
- Issue #6095: Make directory argument to os.listdir optional.

4431 4432 4433
- Issue #9277: Fix bug in struct.pack for bools in standard mode (e.g.,
  struct.pack('>?')): if conversion to bool raised an exception then that
  exception wasn't properly propagated on machines where char is unsigned.
Mark Dickinson's avatar
Mark Dickinson committed
4434

4435 4436
- Issue #5180: Fixed a bug that prevented loading 2.x pickles in 3.x python when
  they contain instances of old-style classes.
4437

4438 4439
- Issue #9165: Add new functions math.isfinite and cmath.isfinite, to accompany
  existing isinf and isnan functions.
4440

4441 4442
- Issue #1578269: Implement os.symlink for Windows 6.0+.  Patch by Jason
  R. Coombs.
4443

Benjamin Peterson's avatar
Benjamin Peterson committed
4444 4445 4446
- In struct.pack, correctly propogate exceptions from computing the truth of an
  object in the '?' format.

4447 4448
- Issue #9000: datetime.timezone objects now have eval-friendly repr.

Benjamin Peterson's avatar
Benjamin Peterson committed
4449 4450
- In the math module, correctly lookup __trunc__, __ceil__, and __floor__ as
  special methods.
4451

4452 4453 4454 4455
- Issue #9005: Prevent utctimetuple() from producing year 0 or year 10,000.
  Prior to this change, timezone adjustment in utctimetuple() could produce
  tm_year value of 0 or 10,000.  Now an OverflowError is raised in these edge
  cases.
4456

4457 4458 4459 4460 4461 4462
- Issue #6641: The ``datetime.strptime`` method now supports the ``%z``
  directive.  When the ``%z`` directive is present in the format string, an
  aware ``datetime`` object is returned with ``tzinfo`` bound to a
  ``datetime.timezone`` instance constructed from the parsed offset.  If both
  ``%z`` and ``%Z`` are present, the data in ``%Z`` field is used for timezone
  name, but ``%Z`` data without ``%z`` is discarded.
4463

4464
- Issue #5094: The ``datetime`` module now has a simple concrete class
4465 4466 4467 4468 4469
  implementing ``datetime.tzinfo`` interface.  Instances of the new class,
  ``datetime.timezone``, return fixed name and UTC offset from their
  ``tzname(dt)`` and ``utcoffset(dt)`` methods.  The ``dst(dt)`` method always
  returns ``None``.  A class attribute, ``utc`` contains an instance
  representing the UTC timezone.  Original patch by Rafe Kaplan.
4470

4471 4472
- Issue #8973: Add __all__ to struct module; this ensures that help(struct)
  includes documentation for the struct.Struct class.
4473

4474
- Issue #3129: Trailing digits in struct format string are no longer ignored.
4475
  For example, "1" or "ilib123" are now invalid formats and cause
4476
  ``struct.error`` to be raised.  Patch by Caleb Deveraux.
4477

4478 4479 4480
- Issue #7384: If the system readline library is linked against ncurses, the
  curses module must be linked against ncurses as well. Otherwise it is not safe
  to load both the readline and curses modules in an application.
Stefan Krah's avatar
Stefan Krah committed
4481

4482 4483
- Issue #2810: Fix cases where the Windows registry API returns ERROR_MORE_DATA,
  requiring a re-try in order to get the complete result.
4484

4485 4486 4487 4488 4489
- Issue #8692: Optimize math.factorial: replace the previous naive algorithm
  with an improved 'binary-split' algorithm that uses fewer multiplications and
  allows many of the multiplications to be performed using plain C integer
  arithmetic instead of PyLong arithmetic.  Also uses a lookup table for small
  arguments.
4490

4491 4492 4493
- Issue #8674: Fixed a number of incorrect or undefined-behaviour-inducing
  overflow checks in the audioop module.

4494 4495
- Issue #8644: The accuracy of td.total_seconds() has been improved (by
  calculating with integer arithmetic instead of float arithmetic internally):
4496 4497
  the result is now always correctly rounded, and is equivalent to ``td /
  timedelta(seconds=1)``.
4498

4499 4500 4501
- Issue #2706: Allow division of a timedelta by another timedelta: timedelta /
  timedelta, timedelta % timedelta, timedelta // timedelta and divmod(timedelta,
  timedelta) are all supported.
4502

4503 4504
- Issue #8314: Fix unsigned long long bug in libffi on Sparc v8.

4505 4506 4507 4508 4509
- Issue #8300: When passing a non-integer argument to struct.pack with any
  integer format code, struct.pack first attempts to convert the non-integer
  using its __index__ method.  If that method is non-existent or raises
  TypeError it goes on to try the __int__ method, as described below.

4510 4511
- Issue #8142: Update libffi to the 3.0.9 release.

4512 4513
- Issue #6949: Allow the _dbm extension to be built with db 4.8.x.

4514
- Issue #6544: Fix a reference leak in the kqueue implementation's error
4515 4516
  handling.

4517 4518 4519
- Stop providing crtassem.h symbols when compiling with Visual Studio 2010, as
  msvcr100.dll is not a platform assembly anymore.

4520 4521
- Issue #6508: Add posix.{getresuid,getresgid,setresuid,setresgid}.

4522 4523
- Issue #7078: Set struct.__doc__ from _struct.__doc__.

4524
- Issue #3366: Add erf, erfc, expm1, gamma, lgamma functions to math module.
4525

4526 4527
- Issue #6877: It is now possible to link the readline extension to the libedit
  readline emulation on OSX 10.5 or later.
4528

4529 4530
- Issue #6848: Fix curses module build failure on OS X 10.6.

4531 4532
- Fix a segfault that could be triggered by expat with specially formed input.

4533 4534 4535
- Issue #6561: '\d' in a regex now matches only characters with Unicode category
  'Nd' (Number, Decimal Digit).  Previously it also matched characters with
  category 'No'.
4536

4537 4538
- Issue #4509: Array objects are no longer modified after an operation failing
  due to the resize restriction in-place when the object has exported buffers.
4539

4540 4541
- Issue #2389: Array objects are now pickled in a portable manner.

4542 4543 4544
- Expat: Fix DoS via XML document with malformed UTF-8 sequences
  (CVE_2009_3560).

4545 4546 4547
- Issue #7242: On Solaris 9 and earlier calling os.fork() from within a thread
  could raise an incorrect RuntimeError about not holding the import lock.  The
  import lock is now reinitialized after fork.
4548

4549 4550 4551
- Issue #7999: os.setreuid() and os.setregid() would refuse to accept a -1
  parameter on some platforms such as OS X.

4552 4553
- Build the ossaudio extension on GNU/kFreeBSD.

4554 4555
- Issue #7347: winreg: Add CreateKeyEx and DeleteKeyEx, as well as fix a bug in
  the return value of QueryReflectionKey.
4556

4557
- Issue #7567: PyCurses_setupterm: Don't call ``setupterm`` twice.
4558

4559 4560 4561
Build
-----

4562 4563
- Use OpenSSL 1.0.0a on Windows.

4564 4565
- Issue #9280: Make sharedinstall depend on sharedmods.

4566 4567 4568 4569 4570
- Issue #9189: Make a user-specified CFLAGS, CPPFLAGS, or LDFLAGS setting
  override the configure and makefile defaults, without deleting options the
  user didn't intend to override.  Developers should no longer need to specify
  OPT or EXTRA_CFLAGS, although those variables are still present for
  backward-compatibility.
4571

4572 4573
- Issue #8854: Fix finding Visual Studio 2008 on Windows x64.

4574 4575
- Issue #1759169, #8864: Drop _XOPEN_SOURCE on Solaris, define it for
  multiprocessing only.
4576

4577 4578 4579 4580
- Issue #8625: Turn off optimization in --with-pydebug builds with gcc.
  (Optimization was unintentionally turned on in gcc --with-pydebug builds as a
  result of the issue #1628484 fix, combined with autoconf's strange choice of
  default CFLAGS produced by AC_PROG_CC for gcc.)
4581

4582 4583
- Issue #3646: It is now easily possible to install a Python framework into your
  home directory on MacOSX, see Mac/README for more information.
4584

4585 4586
- Issue #3928: os.mknod() now available in Solaris, also.

4587 4588 4589
- Issue #3326: Build Python without -fno-strict-aliasing when the gcc does not
  give false warnings.

4590 4591 4592
- Issue #1628484: The Makefile doesn't ignore the CFLAGS environment variable
  anymore.  It also forwards the LDFLAGS settings to the linker when building a
  shared library.
4593

4594 4595
- Issue #6716: Quote -x arguments of compileall in MSI installer.  Exclude 2to3
  tests from compileall.
4596

4597
- Issue #3920, #7903: Define _BSD_SOURCE on OpenBSD 4.4 through 4.9.
4598

4599 4600 4601
- Issue #7632: When Py_USING_MEMORY_DEBUGGER is defined, disable the private
  memory allocation scheme in dtoa.c and use PyMem_Malloc and PyMem_Free
  instead.  Also disable caching of powers of 5.
4602

4603 4604 4605 4606 4607
- Issue #6491: Allow --with-dbmliborder to specify that no dbms will be built.

- Issue #6943: Use pkg-config to find the libffi headers when the
  --with-system-ffi flag is used.

4608 4609 4610 4611
- Issue #7609: Add a --with-system-expat option that causes the system's expat
  library to be used for the pyexpat module instead of the one included with
  Python.

4612 4613 4614
- Issue #7589: Only build the nis module when the correct header files are
  found.

4615
- Switch to OpenSSL 0.9.8l and sqlite 3.6.21 on Windows.
4616

4617 4618 4619
- Issue #5792: Extend the short float repr support to x86 systems using
  icc or suncc.

4620 4621 4622
- Issue #6603: Change READ_TIMESTAMP macro in ceval.c so that it compiles
  correctly under gcc on x86-64.  This fixes a reported problem with the
  --with-tsc build on x86-64.
4623

4624
- Issue #6802: Fix build issues on MacOSX 10.6.
4625

4626 4627
- Issue #6244: Allow detect_tkinter to look for Tcl/Tk 8.6.

4628
- Issue #4601: 'make install' did not set the appropriate permissions on
4629 4630
  directories.

4631
- Issue #5390: Add uninstall icon independent of whether file extensions are
4632
  installed.
4633

4634
- Issue #7541: When using ``python-config`` with a framework install the
4635
  compiler might use the wrong library.
4636

4637 4638
- python-config now supports multiple options on the same command line.

4639 4640
- Issue #8509: Fix quoting in help strings and code snippets in configure.in.

4641 4642
- Issue #8510: Update to autoconf2.65.

4643
Documentation
4644
-------------
4645

4646 4647 4648
- Issue #9817: Add expat COPYING file; add expat, libffi and expat licenses
  to Doc/license.rst.

4649 4650 4651
- Issue #9524: Document that two CTRL* signals are meant for use only
  with os.kill.

4652
- Issue #9255: Document that the 'test' package is meant for internal Python use
4653 4654
  only.

4655
- A small WSGI server was added as Tools/scripts/serve.py, and is used to
4656 4657
  implement a local documentation server via 'make serve' in the doc directory.

4658 4659
- Updating `Using Python` documentation to include description of CPython's -J
  and -X options.
4660

4661 4662 4663
- Document that importing a module that has None in sys.modules triggers an
  ImportError.

4664 4665
- Issue #6556: Fixed the Distutils configuration files location explanation for
  Windows.
4666

4667 4668
- Update python manual page (options -B, -O0, -s, environment variables
  PYTHONDONTWRITEBYTECODE, PYTHONNOUSERSITE).
4669

4670 4671 4672
- Issue #8909: Added the size of the bitmap used in the installer created by
  distutils' bdist_wininst. Patch by Anatoly Techtonik.

4673 4674 4675
Tests
-----

4676 4677
- Issue #9251: test_threaded_import didn't fail when run through regrtest if the
  import lock was disabled.
4678

4679 4680
- Issue #8605: Skip test_gdb if Python is compiled with optimizations.

4681
- Issue #7449: Skip test_socketserver if threading support is disabled.
4682

4683 4684 4685
- Issue #8672: Add a zlib test ensuring that an incomplete stream can be handled
  by a decompressor object without errors (it returns incomplete uncompressed
  data).
4686

4687
- Issue #8533: regrtest uses backslashreplace error handler for stdout to avoid
4688
  UnicodeEncodeError (write non-ASCII character to stdout using ASCII encoding).
4689

4690 4691 4692
- Issue #8576: Remove use of find_unused_port() in test_smtplib and
  test_multiprocessing.  Patch by Paul Moore.

4693 4694 4695
- Issue #7449: Fix many tests to support Python compiled without thread
  support. Patches written by Jerry Seutter.

4696 4697
- Issue #8108: test_ftplib's non-blocking SSL server now has proper handling of
  SSL shutdowns.
4698

4699 4700
- Issues #8279, #8330, #8437, #8480, #8495: Fix test_gdb failures, patch written
  by Dave Malcolm.
4701

4702 4703
- Issue #3864: Skip three test_signal tests on freebsd6 because they fail if any
  thread was previously started, most likely due to a platform bug.
4704

4705 4706
- Issue #8193: Fix test_zlib failure with zlib 1.2.4.

4707 4708
- Issue #8248: Add some tests for the bool type.  Patch by Gregory Nofi.

4709 4710 4711
- Issue #8263: Now regrtest.py will report a failure if it receives a
  KeyboardInterrupt (SIGINT).

4712 4713
- Issue #8180 and #8207: Fix test_pep277 on OS X and add more tests for special
  Unicode normalization cases.
4714

4715 4716
- Issue #7783: test.support.open_urlresource invalidates the outdated files from
  the local cache.
4717

4718 4719 4720
- Issue #7849: Now the utility ``check_warnings`` verifies if the warnings are
  effectively raised.

4721 4722
- The four path modules (genericpath, macpath, ntpath, posixpath) share a common
  TestCase for some tests: test_genericpath.CommonTest.
4723

4724 4725
- Print platform information when running the whole test suite, or using the
  --verbose flag.
4726

4727 4728 4729
- Issue #767675: enable test_pep277 on POSIX platforms with Unicode-friendly
  filesystem encoding.

4730 4731
- Issue #6292: for the moment at least, the test suite runs cleanly if python is
  run with the -OO flag.  Tests requiring docstrings are skipped.
4732

4733 4734 4735 4736
- Issue #7712: test.support gained a new `temp_cwd` context manager which is now
  also used by regrtest to run all the tests in a temporary directory.  The
  original CWD is saved in `support.SAVEDCWD`.  Thanks to Florent Xicluna who
  helped with the patch.
4737

4738 4739 4740
- Issue #7924: Fix an intermittent 'XXX undetected error' failure in test_capi
  (only seen so far on platforms where the curses module wasn't built), due to
  an uncleared exception.
4741

4742 4743
- Issue #7728: test_timeout was changed to use support.bind_port instead of a
  hard coded port.
4744

4745
- Issue #7376: Instead of running a self-test (which was failing) when called
4746 4747
  with no arguments, doctest.py now gives a usage message.

4748 4749
- Issue #7396: fix regrtest -s, which was broken by the -j enhancement.

4750
- Issue #7498: test_multiprocessing now uses test.support.find_unused_port
4751 4752
  instead of a hardcoded port number in test_rapid_restart.

4753 4754 4755
- Issue #7431: Use TESTFN in test_linecache instead of trying to create a file
  in the Lib/test directory, which might be read-only for the user running the
  tests.
4756

4757 4758
- Issue #7324: Add a sanity check to regrtest argument parsing to catch the case
  of an option with no handler.
4759

4760 4761
- Issue #7312: Add a -F flag to run the selected tests in a loop until a test
  fails.  Can be combined with -j.
4762

4763 4764 4765 4766
- Issue #6551: test_zipimport could import and then destroy some modules of the
  encodings package, which would make other tests fail further down the road
  because the internally cached encoders and decoders would point to empty
  global variables.
4767

4768 4769
- Issue #7295: Do not use a hardcoded file name in test_tarfile.

4770 4771 4772
- Issue #7270: Add some dedicated unit tests for multi-thread synchronization
  primitives such as Lock, RLock, Condition, Event and Semaphore.

4773 4774 4775 4776
- Issue #7248 (part 2): Use a unique temporary directory for importlib source
  tests instead of tempfile.tempdir. This prevents the tests from sharing state
  between concurrent executions on the same system.

4777 4778 4779 4780
- Issue #7248: In importlib.test.source.util a try/finally block did not make
  sure that some referenced objects actually were created in the block before
  calling methods on the object.

4781
- Issue #7222: Make thread "reaping" more reliable so that reference
4782 4783 4784
  leak-chasing test runs give sensible results. The previous method of reaping
  threads could return successfully while some Thread objects were still
  referenced. This also introduces a new private function:
4785 4786
  :func:`_thread._count()`.

4787 4788
- Issue #7151: Fixed regrtest -j so that output to stderr from a test no longer
  runs the risk of causing the worker thread to fail.
4789

4790 4791 4792
- Issue #7055: test___all__ now greedily detects all modules which have an
  __all__ attribute, rather than using a hardcoded and incomplete list.

R. David Murray's avatar
R. David Murray committed
4793
- Issue #7058: Added save/restore for things like sys.argv and cwd to
4794 4795
  runtest_inner in regrtest, with warnings if the called test modifies them, and
  a new section in the summary report at the end.
4796

4797 4798
- Issue #7042: Fix test_signal (test_itimer_virtual) failure on OS X 10.6.

4799 4800 4801
- Fixed tests in importlib.test.source.test_abc_loader that were masking the
  proper exceptions that should be raised for missing or improper code object
  bytecode.
4802

4803
- Removed importlib's custom test discovery code and switched to
4804
  unittest.TestLoader.discover().
4805

4806 4807 4808
Tools/Demos
-----------

4809
- Issue #5464, #8974: Implement plural forms in msgfmt.py.
4810

4811
- iobench (a file I/O benchmark) and ccbench (a concurrency benchmark) were
4812
  added to the `Tools/` directory.  They were previously living in the sandbox.
4813

Benjamin Peterson's avatar
Benjamin Peterson committed
4814

4815 4816 4817 4818 4819 4820 4821 4822
What's New in Python 3.1?
=========================

*Release date: 27-June-2009*

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

Mark Dickinson's avatar
Mark Dickinson committed
4823 4824 4825
- Issue #6334: Fix bug in range length calculation for ranges with
  large arguments.

4826 4827 4828
- Issue #6329: Fixed iteration for memoryview objects (it was being blocked
  because it wasn't recognized as a sequence).

4829 4830 4831
Library
-------

4832 4833
- Issue #6126: Fixed pdb command-line usage.

4834
- Issue #6314: logging: performs extra checks on the "level" argument.
4835

4836 4837
- Issue #6274: Fixed possible file descriptors leak in subprocess.py

4838 4839 4840
- Accessing io.StringIO.buffer now raises an AttributeError instead of
  io.UnsupportedOperation.

4841
- Issue #6271: mmap tried to close invalid file handle (-1) when anonymous.
4842 4843
  (On Unix)

4844 4845 4846
- Issue #1202: zipfile module would cause a struct.error when attempting to
  store files with a CRC32 > 2**31-1.

4847 4848 4849 4850 4851
Extension Modules
-----------------

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

4852

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Antoine Pitrou committed
4853 4854
What's New in Python 3.1 Release Candidate 2?
=============================================
Benjamin Peterson's avatar
Benjamin Peterson committed
4855

Benjamin Peterson's avatar
Benjamin Peterson committed
4856
*Release date: 13-June-2009*
Benjamin Peterson's avatar
Benjamin Peterson committed
4857 4858 4859 4860

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

4861 4862
- Fixed SystemError triggered by "range([], 1, -1)".

4863 4864 4865
- Issue #5924: On Windows, a large PYTHONPATH environment variable
  (more than 255 characters) would be completely ignored.

4866 4867 4868
- Issue #4547: When debugging a very large function, it was not always
  possible to update the lineno attribute of the current frame.

4869
- Issue #5330: C functions called with keyword arguments were not reported by
4870
  the various profiling modules (profile, cProfile). Patch by Hagen Fürstenau.
4871

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4872 4873 4874
Library
-------

4875
- Issue #6438: Fixed distutils.cygwinccompiler.get_versions : the regular
4876
  expression string pattern was trying to match against a bytes returned by
4877 4878
  Popen. Tested under win32 to build the py-postgresql project.

4879 4880
- Issue #6258: Support AMD64 in bdist_msi.

4881 4882 4883
- Issue #6195: fixed doctest to no longer try to read 'source' data from
  binary files.

4884 4885 4886
- Issue #5262: Fixed bug in next rollover time computation in
  TimedRotatingFileHandler.

4887 4888 4889 4890
- Issue #6217: The C implementation of io.TextIOWrapper didn't include the
  errors property.  Additionally, the errors and encoding properties of StringIO
  are always None now.

4891 4892 4893 4894 4895
- Issue #6137: The pickle module now translates module names when loading
  or dumping pickles with a 2.x-compatible protocol, in order to make data
  sharing and migration easier. This behaviour can be disabled using the
  new `fix_imports` optional argument.

4896 4897
- Removed the ipaddr module.

4898 4899 4900 4901
- Issue #3613: base64.{encode,decode}string are now called
  base64.{encode,decode}bytes which reflects what type they accept and return.
  The old names are still there as deprecated aliases.

4902 4903
- Issue #5767: Remove sgmlop support from xmlrpc.client.

4904 4905
- Issue #6150: Fix test_unicode on wide-unicode builds.

4906 4907 4908
- Issue #6149: Fix initialization of WeakValueDictionary objects from non-empty
  parameters.

Martin v. Löwis's avatar
Martin v. Löwis committed
4909 4910 4911
Windows
-------

4912 4913
- Issue #6221: Delete test registry key before running the test.

Martin v. Löwis's avatar
Martin v. Löwis committed
4914 4915
- Issue #6158: Package Sine-1000Hz-300ms.aif in MSI file.

4916 4917 4918 4919 4920 4921 4922
C-API
-----

- Issue #5735: Python compiled with --with-pydebug should throw an
  ImportError when trying to import modules compiled without
  --with-pydebug, and vice-versa.

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4924 4925 4926 4927 4928 4929
Build
-----

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

4930 4931 4932 4933
- Issue #5809: Specifying both --enable-framework and --enable-shared is
  an error. Configure now explicity tells you about this.


4934

Mark Dickinson's avatar
Mark Dickinson committed
4935 4936
What's New in Python 3.1 release candidate 1?
=============================================
Benjamin Peterson's avatar
Benjamin Peterson committed
4937

Benjamin Peterson's avatar
Benjamin Peterson committed
4938
*Release date: 2009-05-30*
Benjamin Peterson's avatar
Benjamin Peterson committed
4939 4940 4941 4942

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

4943 4944 4945
- Issue #6097: Escape UTF-8 surrogates resulting from mbstocs conversion
  of the command line.

4946 4947
- Issue #6012: Add cleanup support to O& argument parsing.

4948 4949 4950
- Issue #6089: Fixed str.format with certain invalid field specifiers
  that would raise SystemError.

4951 4952 4953
- Issue #5982: staticmethod and classmethod now expose the wrapped
  function with __func__.

4954 4955
- Added support for multiple context managers in the same with-statement.
  Deprecated contextlib.nested() which is no longer needed.
4956

4957 4958 4959 4960
- Issue #5829: complex("1e500") no longer raises OverflowError.  This
  makes it consistent with float("1e500") and interpretation of real
  and imaginary literals.

4961 4962
- Issue #3527: Removed Py_WIN_WIDE_FILENAMES which is not used any more.

4963 4964
- Issue #5994: the marshal module now has docstrings.

4965 4966 4967 4968 4969 4970
- Issue #5981: Fix three minor inf/nan issues in float.fromhex:
  (1) inf and nan strings with trailing whitespace were incorrectly
  rejected;  (2) parsing of strings representing infinities and nans
  was locale aware; and (3) the interpretation of fromhex('-nan')
  didn't match that of float('-nan').

Benjamin Peterson's avatar
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4971 4972 4973
Library
-------

4974 4975
- Issue #4859: Implement PEP 383 for pwd, spwd, and grp.

4976 4977
- smtplib 'login' and 'cram-md5' login are also fixed (see Issue #5259).

4978 4979 4980
- Issue #6121: pydoc now ignores leading and trailing spaces in the
  argument to the 'help' function.

4981 4982 4983
- Issue #6118: urllib.parse.quote_plus ignored the encoding and errors
  arguments for strings with a space in them.

4984 4985 4986
- collections.namedtuple() was not working with the following field
  names:  cls, self, tuple, itemgetter, and property.

4987 4988 4989
- In unittest, using a skipping decorator on a class is now equivalent to
  skipping every test on the class.  The ClassTestSuite class has been removed.

4990 4991 4992
- Issue #6050: Don't fail extracting a directory from a zipfile if
  the directory already exists.

4993 4994 4995 4996
- Issue #1309352: fcntl now converts its third arguments to a C `long` rather
  than an int, which makes some operations possible under 64-bit Linux (e.g.
  DN_MULTISHOT with F_NOTIFY).

4997 4998 4999
- Issue #5761: Add the name of the underlying file to the repr() of various
  IO objects.

5000 5001 5002
- Issue #5259: smtplib plain auth login no longer gives a traceback.  Fix
  by Musashi Tamura, tests by Marcin Bachry.

5003 5004 5005 5006
- Issue #1983: Fix functions taking or returning a process identifier to use
  the dedicated C type ``pid_t`` instead of a C ``int``. Some platforms have
  a process identifier type wider than the standard C integer type.

5007 5008 5009
- Issue #4066: smtplib.SMTP_SSL._get_socket now correctly returns the socket.
  Patch by Farhan Ahmad, test by Marcin Bachry.

5010 5011 5012
- Issue #2116: Weak references and weak dictionaries now support copy()ing and
  deepcopy()ing.

5013 5014
- Issue #1655: Make imaplib IPv6-capable. Patch by Derek Morr.

5015 5016
- Issue #5918: Fix a crash in the parser module.

5017 5018
- Issue #1664: Make nntplib IPv6-capable. Patch by Derek Morr.

5019 5020 5021 5022 5023
- Issue #5006: Better handling of unicode byte-order marks (BOM) in the io
  library. This means, for example, that opening an UTF-16 text file in
  append mode doesn't add a BOM at the end of the file if the file isn't
  empty.

5024 5025 5026 5027
- Issue #4050: inspect.findsource/getsource now raise an IOError if the 'source'
  file is a binary.  Patch by Brodie Rao, tests by Daniel Diniz.  This fix
  corrects a pydoc regression.

5028
- Issue #5955: aifc's close method did not close the file it wrapped,
5029 5030
  now it does.  This also means getfp method now returns the real fp.

5031 5032 5033 5034 5035
Installation
------------

- Issue #6047: fullinstall has been removed because Python 3's executable will
  now be known as python3.
Benjamin Peterson's avatar
Benjamin Peterson committed
5036

5037 5038
- Lib/smtpd.py is no longer installed as a script.

5039 5040 5041
Extension Modules
-----------------

Martin v. Löwis's avatar
Martin v. Löwis committed
5042
- Issue #3061: Use wcsftime for time.strftime where available.
5043

5044 5045
- Issue #4873: Fix resource leaks in error cases of pwd and grp.

5046 5047
- Issue #6093: Fix off-by-one error in locale.strxfrm.

Benjamin Peterson's avatar
Benjamin Peterson committed
5048 5049
- The _functools and _locale modules are now built into the libpython shared
  library instead of as extension modules.
Benjamin Peterson's avatar
Benjamin Peterson committed
5050

5051 5052 5053 5054 5055 5056 5057
Build
-----

- Issue #3585: Add pkg-config support. It creates a python-2.7.pc file
  and a python3.pc symlink in the $(LIBDIR)/pkgconfig directory. Patch by
  Clinton Roy.

5058 5059 5060
Tests
-----

5061
- Issue #5442: Tests for importlib were not properly skipping case-sensitivity
5062 5063 5064 5065 5066
  tests on darwin even when the OS was installed on a case-sensitive
  filesystem. Also fixed tests that should not be run when
  sys.dont_write_bytecode is true.


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5067 5068 5069
What's New in Python 3.1 beta 1?
================================

Benjamin Peterson's avatar
Benjamin Peterson committed
5070
*Release date: 2009-05-06*
Benjamin Peterson's avatar
Benjamin Peterson committed
5071 5072 5073 5074

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

Mark Dickinson's avatar
Mark Dickinson committed
5075 5076 5077
- Issue #5914: Add new C API function PyOS_string_to_double, and
  deprecate PyOS_ascii_strtod and PyOS_ascii_atof.

5078 5079 5080 5081
- Issue #3382: float.__format__, complex.__format__, and %-formatting
  no longer map 'F' to 'f'. Because of issue #5859 (below), this only
  affects nan -> NAN and inf -> INF.

5082 5083 5084 5085
- Issue #5799: ntpath (ie, os.path on Windows) fully supports UNC pathnames
  in all operations, including splitdrive, split, etc.  splitunc() now issues
  a PendingDeprecation warning.

5086 5087 5088 5089 5090 5091 5092 5093 5094
- Issue #5920: For float.__format__, change the behavior with the
  empty presentation type (that is, not one of 'e', 'f', 'g', or 'n')
  to be like 'g' but with at least one decimal point and with a
  default precision of 12. Previously, the behavior the same but with
  a default precision of 6.  This more closely matches str(), and
  reduces surprises when adding alignment flags to the empty
  presentation type. This also affects the new complex.__format__ in
  the same way.

5095 5096
- Implement PEP 383, Non-decodable Bytes in System Character Interfaces.

5097 5098 5099 5100
- Issue #5890: in subclasses of 'property' the __doc__ attribute was
  shadowed by classtype's, even if it was None.  property now
  inserts the __doc__ into the subclass instance __dict__.

5101 5102 5103
- Issue #4426: The UTF-7 decoder was too strict and didn't accept some legal
  sequences. Patch by Nick Barnes and Victor Stinner.

5104
- Issue #3672: Reject surrogates in utf-8 codec; add surrogatepass error handler.
5105

5106 5107 5108 5109
- Issue #5883: In the io module, the BufferedIOBase and TextIOBase ABCs have
  received a new method, detach().  detach() disconnects the underlying stream
  from the buffer or text IO and returns it.

5110 5111 5112 5113
- Issue #5859: Remove switch from '%f' to '%g'-style formatting for
  floats with absolute value over 1e50.  Also remove length
  restrictions for float formatting: '%.67f' % 12.34 and '%.120e' %
  12.34 no longer raise an exception.
5114

5115
- Issue #1588: Add complex.__format__. For example,
5116 5117
  format(complex(1, 2./3), '.5') now produces a sensible result.

5118 5119 5120
- Issue #5864: Fix empty format code formatting for floats so that it
  never gives more than the requested number of significant digits.

5121 5122 5123
- Issue #5793: Rationalize isdigit / isalpha / tolower, etc. Includes
  new Py_ISDIGIT / Py_ISALPHA / Py_TOLOWER, etc. in pctypes.h.

5124 5125
- Issue #5835: Deprecate PyOS_ascii_formatd.

5126 5127 5128
- Issue #4971: Fix titlecase for characters that are their own
  titlecase, but not their own uppercase.

5129 5130
- Issue #5283: Setting __class__ in __del__ caused a segfault.

5131 5132 5133
- Issue #5816: complex(repr(z)) now recovers z exactly, even when
  z involves nans, infs or negative zeros.

5134
- Issue #3166: Make int -> float conversions correctly rounded.
5135

5136 5137 5138 5139 5140
- Issue #1869 (and many duplicates): make round(x, n) correctly
  rounded for a float x, by using the decimal <-> binary conversions
  from Python/dtoa.c.  As a consequence, (e.g.) round(x, 2) now
  consistently agrees with format(x, '.2f').

5141 5142 5143
- Issue #5787: object.__getattribute__(some_type, "__bases__") segfaulted on
  some builtin types.

5144 5145
- Issue #5772: format(1e100, '<') produces '1e+100', not '1.0e+100'.

5146 5147
- Issue #5515: str.format() type 'n' combined with commas and leading
  zeros no longer gives odd results with ints and floats.
5148 5149 5150 5151

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

5152
- The str function switches to exponential notation at
5153 5154 5155 5156 5157 5158 5159 5160 5161
  1e11, not 1e12.  This avoids printing 13 significant digits in
  situations where only 12 of them are correct.  Example problem
  value: str(1e11 + 0.5).  (This minor issue has existed in 2.x for a
  long time.)

- Issue #1580: On most platforms, use a 'short' float repr: for a
  finite float x, repr(x) now outputs a string based on the shortest
  sequence of decimal digits that rounds to x.  Previous behaviour was
  to output 17 significant digits and then strip trailing zeros.
5162 5163 5164
  Another minor difference is that the new repr switches to
  exponential notation at 1e16 instead of the previous 1e17; this
  avoids misleading output in some cases.
5165 5166 5167 5168 5169 5170 5171 5172 5173 5174 5175 5176

  There's a new sys attribute sys.float_repr_style, which takes
  the value 'short' to indicate that we're using short float repr,
  and 'legacy' if the short float repr isn't available for one
  reason or another.

  The float repr change involves incorporating David Gay's 'perfect
  rounding' code into the Python core (it's in Python/dtoa.c).  As a
  secondary consequence, all string-to-float and float-to-string
  conversions (including all float formatting operations) will be
  correctly rounded on these platforms.

5177
  See issue #1580 discussions for details of platforms for which
5178 5179
  this change does not apply.

5180 5181
- Issue #5759: float() didn't call __float__ on str subclasses.

5182 5183 5184 5185 5186
- The string.maketrans() function is deprecated; there is a new static method
  maketrans() on the bytes and bytearray classes.  This removes confusion about
  the types string.maketrans() is supposed to work with, and mirrors the
  methods available on the str class.

5187 5188 5189
- Issue #2170: refactored xml.dom.minidom.normalize, increasing both
  its clarity and its speed.

5190
- Issue #1113244: Py_XINCREF, Py_DECREF, Py_XDECREF: Add ``do { ... } while (0)``
5191 5192
  to avoid compiler warnings.

5193 5194 5195
- Issue #3739: The unicode-internal encoder now reports the number of characters
  consumed like any other encoder (instead of the number of bytes).

5196 5197 5198 5199 5200
Installation
------------

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

Benjamin Peterson's avatar
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5201 5202 5203
Library
-------

5204 5205
- Issue #8203: Fix IDLE Credits dialog: view_file() uses its encoding argument.

5206 5207 5208
- Issue #5311: bdist_msi can now build packages that do not depend on a
  specific Python version.

5209 5210 5211
- Issue #5150: IDLE's format menu now has an option to strip trailing
  whitespace.

5212
- Issue #5940: distutils.command.build_clib.check_library_list was not doing
5213 5214
  the right type checkings anymore.

5215 5216 5217
- Issue #4875: On win32, ctypes.util.find_library does no longer
  return directories.

5218 5219
- Issue #5142: Add the ability to skip modules while stepping to pdb.

5220 5221 5222
- Issue #1309567: Fix linecache behavior of stripping subdirectories when
  looking for files given by a relative filename.

5223 5224 5225
- Issue #5923: Update the ``turtle`` module to version 1.1, add two new
  turtle demos in Demo/turtle.

5226 5227 5228
- Issue #5692: In :class:`zipfile.Zipfile`, fix wrong path calculation when
  extracting a file to the root directory.

5229 5230
- Issue #5913: os.listdir() should fail for empty path on windows.

5231 5232 5233 5234
- Issue #5084: unpickling now interns the attribute names of pickled objects,
  saving memory and avoiding growth in size of subsequent pickles. Proposal
  and original patch by Jake McGuire.

5235 5236
- The json module now works exclusively with str and not bytes.

5237 5238 5239
- Issue #3959: The ipaddr module has been added to the standard library.
  Contributed by Google.

5240 5241 5242
- Issue #3002: ``shutil.copyfile()`` and ``shutil.copytree()`` now raise an
  error when a named pipe is encountered, rather than blocking infinitely.

5243 5244
- Issue #5857: tokenize.tokenize() now returns named tuples.

5245 5246
- Issue #4305: ctypes should now build again on mipsel-linux-gnu

5247 5248 5249 5250
- Issue #1734234: Massively speedup ``unicodedata.normalize()`` when the
  string is already in normalized form, by performing a quick check beforehand.
  Original patch by Rauli Ruohonen.

5251 5252 5253 5254
- Issue #5853: calling a function of the mimetypes module from several threads
  at once could hit the recursion limit if the mimetypes database hadn't been
  initialized before.

5255 5256 5257
- Issue #5854: Updated __all__ to include some missing names and remove some
  names which should not be exported.

5258 5259 5260 5261 5262
- Issue #3102:  All global symbols that the _ctypes extension defines
  are now prefixed with 'Py' or '_ctypes'.

- Issue #5041: ctypes does now allow pickling wide character.

5263 5264 5265 5266
- Issue #5812: For the two-argument form of the Fraction constructor,
  Fraction(m, n), m and n are permitted to be arbitrary Rational
  instances.

5267 5268 5269 5270
- Issue #5812: Fraction('1e6') is valid: more generally, any string
  that's valid for float() is now valid for Fraction(), with the
  exception of strings representing NaNs and infinities.

5271 5272 5273
- Issue #5734: BufferedRWPair was poorly tested and had several glaring
  bugs. Patch by Brian Quinlan.

5274 5275 5276 5277 5278 5279
- Issue #1161031: fix readwrite select flag handling: POLLPRI now
  results in a handle_expt_event call, not handle_read_event, and POLLERR
  and POLLNVAL now call handle_close, not handle_expt_event.  Also,
  dispatcher now has an 'ignore_log_types' attribute for suppressing
  log messages, which is set to 'warning' by default.

5280 5281
- Issue #2703: SimpleXMLRPCDispatcher.__init__: Provide default values for
  new arguments introduced in 2.5.
5282 5283 5284 5285

- Issue #5828 (Invalid behavior of unicode.lower): Fixed bogus logic in
  makeunicodedata.py and regenerated the Unicode database (This fixes
  u'\u1d79'.lower() == '\x00').
5286

5287 5288 5289
Extension Modules
-----------------

5290 5291 5292
- Issue #5881: Remove old undocumented compatibility interfaces in hashlib and
  pwd.

5293 5294 5295 5296 5297
- Issue #5463: In struct module, remove deprecated float coercion
  for integer type codes: struct.pack('L', 0.3) should now raise
  an error.  The _PY_STRUCT_FLOAT_COERCE constant has been removed.
  The version number has been bumped to 0.3.

Georg Brandl's avatar
Georg Brandl committed
5298 5299
- Issue #5359: Readd the Berkeley DB detection code to allow _dbm be built
  using Berkeley DB.
5300

5301 5302 5303 5304 5305 5306 5307 5308 5309
Tests
-----

- Issue #5354: New test support function import_fresh_module() makes
  it easy to import both normal and optimised versions of modules.
  test_heapq and test_warnings have been adjusted to use it, tests for
  other modules with both C and Python implementations in the stdlib
  can be adjusted to use it over time.

5310 5311 5312 5313
- Issue #5837: Certain sequences of calls to set() and unset() for
  support.EnvironmentVarGuard objects restored the environment variables
  incorrectly on __exit__.

5314 5315 5316 5317 5318
C-API
-----

- Issue #5630: A replacement PyCObject API, PyCapsule, has been added.

Benjamin Peterson's avatar
Benjamin Peterson committed
5319

5320 5321 5322
What's New in Python 3.1 alpha 2?
=================================

Benjamin Peterson's avatar
Benjamin Peterson committed
5323
*Release date: 2009-4-4*
5324 5325 5326

Core and Builtins
-----------------
5327

5328 5329
- Implement PEP 378, Format Specifier for Thousands Separator, for
  integers.
5330

Benjamin Peterson's avatar
Benjamin Peterson committed
5331 5332
- Issue #5666: Py_BuildValue's 'c' code should create byte strings.

5333 5334 5335
- Issue #5499: The 'c' code for argument parsing functions now only accepts a
  byte, and the 'C' code only accepts a unicode character.

5336 5337 5338
- Fix a problem in PyErr_NormalizeException that leads to "undetected errors"
  when hitting the recursion limit under certain circumstances.

5339 5340
- Issue #1665206: Remove the last eager import in _warnings.c and make it lazy.

5341 5342 5343
- Fix a segfault when running test_exceptions with coverage, caused by
  insufficient checks in accessors of Exception.__context__.

5344 5345 5346 5347
- Issue #5604: non-ASCII characters in module name passed to
  imp.find_module() were converted to UTF-8 while the path is
  converted to the default filesystem encoding, causing nonsense.

5348 5349
- Issue #5126: str.isprintable() returned False for space characters.

5350 5351 5352
- Issue #4865: On MacOSX /Library/Python/2.7/site-packages is added to
  the end sys.path, for compatibility with the system install of Python.

5353 5354 5355 5356 5357
- Issue #4688: Add a heuristic so that tuples and dicts containing only
  untrackable objects are not tracked by the garbage collector. This can
  reduce the size of collections and therefore the garbage collection overhead
  on long-running programs, depending on their particular use of datatypes.

5358 5359 5360 5361
- Issue #5512: Rewrite PyLong long division algorithm (x_divrem) to
  improve its performance.  Long divisions and remainder operations
  are now between 50% and 150% faster.

5362 5363 5364 5365 5366 5367 5368
- Issue #4258: Make it possible to use base 2**30 instead of base
  2**15 for the internal representation of integers, for performance
  reasons.  Base 2**30 is enabled by default on 64-bit machines.  Add
  --enable-big-digits option to configure, which overrides the
  default.  Add sys.int_info structseq to provide information about
  the internal format.

5369 5370 5371 5372
- Issue #4474: PyUnicode_FromWideChar now converts characters outside
  the BMP to surrogate pairs, on systems with sizeof(wchar_t) == 4
  and sizeof(Py_UNICODE) == 2.

5373 5374 5375
- Issue #5237: Allow auto-numbered fields in str.format(). For
  example: '{} {}'.format(1, 2) == '1 2'.

5376 5377 5378
- Issue #5392: when a very low recursion limit was set, the interpreter would
  abort with a fatal error after the recursion limit was hit twice.

5379 5380 5381
- Issue #3845: In PyRun_SimpleFileExFlags avoid invalid memory access with
  short file names.

5382 5383 5384
Library
-------

5385
- Issue #2625: added missing items() call to the for loop in
5386 5387
  mailbox.MH.get_message().

5388 5389 5390 5391
- Issue #5640: Fix _multibytecodec so that CJK codecs don't repeat
  error substitutions from non-strict codec error callbacks in
  incrementalencoder and StreamWriter.

5392 5393 5394
- Issue #5656: Fix the coverage reporting when running the test suite with
  the -T argument.

5395 5396
- Issue #5647: MutableSet.__iand__() no longer mutates self during iteration.

5397 5398
- Issue #5624: Fix the _winreg module name still used in several modules.

5399 5400
- Issue #5628: Fix io.TextIOWrapper.read() with a unreadable buffer.

5401 5402 5403
- Issue #5619: Multiprocessing children disobey the debug flag and causes
  popups on windows buildbots. Patch applied to work around this issue.

5404 5405
- Issue #5400: Added patch for multiprocessing on netbsd compilation/support

5406 5407
- Issue #5387: Fixed mmap.move crash by integer overflow.

Jesse Noller's avatar
Jesse Noller committed
5408 5409 5410
- Issue #5261: Patch multiprocessing's semaphore.c to support context
  manager use: "with multiprocessing.Lock()" works now.

5411 5412 5413
- Issue #5236: Change time.strptime() to only take strings. Didn't work with
  bytes already but the failure was non-obvious.

Jesse Noller's avatar
Jesse Noller committed
5414 5415 5416 5417
- Issue #5177: Multiprocessing's SocketListener class now uses
  socket.SO_REUSEADDR on all connections so that the user no longer needs
  to wait 120 seconds for the socket to expire.

Benjamin Peterson's avatar
Benjamin Peterson committed
5418 5419
- Issue #5595: Fix UnboundedLocalError in ntpath.ismount().

5420 5421 5422
- Issue #1174606: Calling read() without arguments of an unbounded file
  (typically /dev/zero under Unix) could crash the interpreter.

5423 5424 5425
- The max_buffer_size arguments of io.BufferedWriter, io.BufferedRWPair, and
  io.BufferedRandom have been deprecated for removal in Python 3.2.

5426 5427 5428 5429 5430
- Issue #5068: Fixed the tarfile._BZ2Proxy.read() method that would loop
  forever on incomplete input. That caused tarfile.open() to hang when used
  with mode 'r' or 'r:bz2' and a fileobj argument that contained no data or
  partial bzip2 compressed data.

5431 5432 5433
- Issue #2110: Add support for thousands separator and 'n' type
  specifier to Decimal.__format__

5434 5435 5436
- Fix Decimal.__format__ bug that swapped the meanings of the '<' and
  '>' alignment characters.

5437 5438 5439
- The error detection code in FileIO.close() could fail to reflect the `errno`
  value, and report it as -1 instead.

5440 5441 5442
- Issue #5016: FileIO.seekable() could return False if the file position
  was negative when truncated to a C int. Patch by Victor Stinner.

5443 5444 5445
Extension Modules
-----------------

5446 5447
- Issue #5391: mmap now deals exclusively with bytes.

5448 5449
- Issue #5463: In struct module, remove deprecated overflow wrapping
  when packing an integer: struct.pack('=L', -1) now raises
5450 5451 5452
  struct.error instead of returning b'\xff\xff\xff\xff'.  The
  _PY_STRUCT_RANGE_CHECKING and _PY_STRUCT_OVERFLOW_MASKING constants
  have been removed from the struct module.
5453

5454

Benjamin Peterson's avatar
Benjamin Peterson committed
5455
What's New in Python 3.1 alpha 1
Barry Warsaw's avatar
Barry Warsaw committed
5456
================================
Barry Warsaw's avatar
Barry Warsaw committed
5457

Benjamin Peterson's avatar
Benjamin Peterson committed
5458
*Release date: 2009-03-07*
Barry Warsaw's avatar
Barry Warsaw committed
5459 5460 5461 5462

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

5463 5464
- The io module has been reimplemented in C for speed.

5465 5466
- Give dict views an informative __repr__.

5467 5468 5469
- Issue #5247: Improve error message when unknown format codes are
  used when using str.format() with str, int, and float arguments.

5470 5471 5472
- Issue #5249: time.strftime returned malformed string when format string
  contained non ascii character on windows.

5473 5474 5475
- Issue #4626: compile(), exec(), and eval() ignore the coding cookie if the
  source has already been decoded into str.

5476 5477 5478
- Issue #5186: Reduce hash collisions for objects with no __hash__ method by
  rotating the object pointer by 4 bits to the right.

5479 5480 5481
- Issue #4575: Fix Py_IS_INFINITY macro to work correctly on x87 FPUs:
  it now forces its argument to double before testing for infinity.

5482 5483 5484
- Issue #5137: Make len() correctly raise a TypeError when a __len__ method
  returns a non-number type.

5485 5486
- Issue #5182: Removed memoryview.__str__.

5487 5488
- Issue #1717: Removed builtin cmp() function, dropped tp_compare
  slot, the C API functions PyObject_Compare and PyUnicode_Compare and
5489 5490
  the type definition cmpfunc.  The tp_compare slot has been renamed
  to tp_reserved, and is reserved for future usage.
5491

5492
- Issue #1242657: the __len__() and __length_hint__() calls in several tools
5493 5494
  were suppressing all exceptions.  These include list() and bytearray().

5495 5496 5497
- Issue #4707: round(x, n) now returns an integer if x is an integer.
  Previously it returned a float.

5498 5499 5500 5501 5502
- Issue #4753: By enabling a configure option named '--with-computed-gotos'
  on compilers that support it (notably: gcc, SunPro, icc), the bytecode
  evaluation loop is compiled with a new dispatch mechanism which gives
  speedups of up to 20%, depending on the system, on various benchmarks.

5503 5504
- Issue #4874: Most builtin decoders now reject unicode input.

5505 5506 5507
- Issue #4842: Don't allow trailing 'L' when constructing an integer
  from a string.

5508 5509
- Issue #4991: os.fdopen now raises an OSError for invalid file descriptors.

5510 5511 5512
- Issue #4838: When a module is deallocated, free the memory backing the
  optional module state data.

5513
- Issue #4910: Rename nb_long slot to nb_reserved, and change its
5514
  type to ``(void *)``.
5515

5516 5517 5518 5519
- Issue #4935: The overflow checking code in the expandtabs() method common
  to str, bytes and bytearray could be optimized away by the compiler, letting
  the interpreter segfault instead of raising an error.

5520 5521 5522
- Issue #3720: Fix a crash when an iterator modifies its class and removes its
  __next__ method.

5523 5524 5525 5526
- Issue #4910: Builtin int() function and PyNumber_Long/PyNumber_Int API
  function no longer attempt to call the __long__ slot to convert an object
  to an integer.  Only the __int__ and __trunc__ slots are examined.

5527 5528
- Issue #4893: Use NT threading on CE.

5529 5530
- Issue #4915: Port sysmodule to Windows CE.

5531 5532 5533 5534
- Issue #4868: utf-8, utf-16 and latin1 decoding are now 2x to 4x faster. The
  common cases are optimized thanks to a dedicated fast path and a moderate
  amount of loop unrolling.

5535 5536 5537 5538 5539 5540
- Issue #4074: Change the criteria for doing a full garbage collection (i.e.
  collecting the oldest generation) so that allocating lots of objects without
  destroying them does not show quadratic performance. Based on a proposal by
  Martin von Löwis at
  http://mail.python.org/pipermail/python-dev/2008-June/080579.html.

5541
- Issue #4604: Some objects of the I/O library could still be used after
5542 5543 5544
  having been closed (for instance, a read() call could return some
  previously buffered data). Patch by Dmitry Vasiliev.

5545 5546 5547 5548 5549
- Issue #4705: Fix the -u ("unbuffered binary stdout and stderr") command-line
  flag to work properly. Furthermore, when specifying -u, the text stdout
  and stderr streams have line-by-line buffering enabled (the default being
  to buffer arbitrary chunks of data).

5550 5551 5552 5553
- The internal table, _PyLong_DigitValue, is now an array of unsigned chars
  instead of ints (reducing its size from 4 to 8 times thereby reducing
  Python's overall memory).

5554 5555 5556 5557 5558 5559
- Issue #1180193: When importing a module from a .pyc (or .pyo) file with
  an existing .py counterpart, override the co_filename attributes of all
  code objects if the original filename is obsolete (which can happen if the
  file has been renamed, moved, or if it is accessed through different paths).
  Patch by Ziga Seilnacht and Jean-Paul Calderone.

5560 5561 5562 5563
- Issue #4580: Fix slicing of memoryviews when the item size is greater than
  one byte. Also fixes the meaning of len() so that it returns the number of
  items, rather than the size in bytes.

5564 5565
- Issue #4075: Use OutputDebugStringW in Py_FatalError.

5566 5567 5568
- Issue #4747: When the terminal does not use utf-8, executing a script with
  non-ascii characters in its name could fail with a "SyntaxError: None" error.

5569 5570
- Issue #4797: IOError.filename was not set when ``_fileio.FileIO`` failed
  to open file with a bytes filename on Windows.
5571

5572 5573 5574
- Issue #3680: Reference cycles created through a dict, set or deque iterator
  did not get collected.

5575 5576 5577
- Issue #4701: PyObject_Hash now implicitly calls PyType_Ready on types
  where the tp_hash and tp_dict slots are both NULL.

5578 5579 5580
- Issue #4759: None is now allowed as the first argument of
  bytearray.translate().  It was always allowed for bytes.translate().

5581 5582 5583
- Added test case to ensure attempts to read from a file opened for writing
  fail.

5584 5585
- Issue #3106: Speedup some comparisons (str/str and int/int).

5586 5587 5588
- Issue #2183: Simplify and optimize bytecode for list, dict and set
  comprehensions. Original patch for list comprehensions by Neal Norwitz.

5589 5590 5591 5592
- Issue #2467: gc.DEBUG_STATS reported invalid elapsed times. Also, always
  print elapsed times, not only when some objects are uncollectable /
  unreachable. Original patch by Neil Schemenauer.

5593 5594
- Issue #3439: Add a bit_length method to int.

5595 5596 5597 5598
- Issue #2173: When getting device encoding, check that return value of
  nl_langinfo is not the empty string.  This was causing silent build
  failures on OS X.

5599 5600 5601 5602
- Issue #4597: Fixed several opcodes that weren't always propagating
  exceptions.

- Issue #4589: Fixed exception handling when the __exit__ function of a
5603 5604
  context manager returns a value that cannot be converted to a bool.

5605 5606 5607 5608 5609
- Issue #4445: Replace "sizeof(PyBytesObject)" with
  "offsetof(PyBytesObject, ob_sval) + 1" when allocating memory for
  bytes instances.  On a typical machine this saves 3 bytes of memory
  (on average) per allocation of a bytes instance.

5610 5611 5612 5613
- Issue #4533: File read operation was dreadfully slow due to a slowly
  growing read buffer. Fixed by using the same growth rate algorithm as
  Python 2.x.

5614 5615 5616
- Issue #4509: Various issues surrounding resize of bytearray objects to
  which there are buffer exports (e.g. memoryview instances).

5617 5618 5619 5620
- Issue #4233: Changed semantic of ``_fileio.FileIO``'s ``close()``
  method on file objects with closefd=False. The file descriptor is still
  kept open but the file object behaves like a closed file. The ``FileIO``
  object also got a new readonly attribute ``closefd``.
5621

5622 5623 5624
- Issue #4569: Interpreter crash when mutating a memoryview with an item size
  larger than 1.

5625 5626
- Issue #4748: Lambda generators no longer return a value.

5627 5628
- The re.sub(), re.subn() and re.split() functions now accept a flags parameter.

5629 5630 5631 5632 5633
- Issue #5108: Handle %s like %S, %R and %A in PyUnicode_FromFormatV(): Call
  PyUnicode_DecodeUTF8() once, remember the result and output it in a second
  step. This avoids problems with counting UTF-8 bytes that ignores the effect
  of using the replace error handler in PyUnicode_DecodeUTF8().

Barry Warsaw's avatar
Barry Warsaw committed
5634 5635
Library
-------
5636

5637 5638 5639
- Issue #7071: byte-compilation in Distutils is now done with respect to
  sys.dont_write_bytecode.

5640
- Issue #7066: archive_util.make_archive now restores the cwd if an error is
5641 5642
  raised. Initial patch by Ezio Melotti.

5643
- Issue #6516: Added owner/group support when creating tar archives in
5644 5645
  Distutils.

5646 5647
- Issue #6954: Fixed crash when using DISTUTILS_DEBUG flag in Distutils.

5648 5649 5650 5651
- Issue #6163: Fixed HP-UX runtime library dir options in
  distutils.unixcompiler. Initial patch by Sridhar Ratnakumar and
  Michael Haubenwallner.

5652 5653
- Issue #6693: New functions in site.py to get user/global site packages paths.

5654 5655 5656 5657
- Issue #6511: ZipFile now raises BadZipfile (instead of an IOError) when
  opening an empty or very small file.

- Issue #6545: Removed assert statements in distutils.Extension, so the
5658 5659
  behavior is similar when used with -O.

5660 5661
- unittest has been split up into a package.  All old names should still work.

5662 5663 5664 5665 5666
- Issue #6466: now distutils.cygwinccompiler and distutils.emxccompiler
  uses the same refactored function to get gcc/ld/dllwrap versions numbers.
  It's `distutils.util.get_compiler_versions`. Added deprecation warnings
  for the obsolete get_versions() functions.

5667 5668 5669 5670
- Issue #6433: fixed issues with multiprocessing.pool.map hanging on empty list

- Issue #6314: logging: Extra checks on the "level" argument in more places.

Florent Xicluna's avatar
Typo.  
Florent Xicluna committed
5671
- Issue #2622: Fixed an ImportError when importing email.message from a
5672 5673
  standalone application built with py2exe or py2app.

5674
- Issue #6455: Fixed test_build_ext under win32.
5675

5676
- Issue #6377: Enabled the compiler option, and deprecate its usage as an
5677 5678
  attribute.

5679 5680
- Issue #6413: Fixed the log level in distutils.dist for announce.

5681 5682
- Issue #6403: Fixed package path usage in build_ext.

5683 5684 5685 5686
- Issues #5155, 5313, 5331: multiprocessing.Process._bootstrap was
  unconditionally calling "os.close(sys.stdin.fileno())" resulting in file
  descriptor errors

5687
- Issue #6365: Distutils build_ext inplace mode was copying the compiled
5688 5689
  extension in a subdirectory if the extension name had dots.

5690
- Issue #6164: Added an AIX specific linker argument in Distutils
5691 5692
  unixcompiler. Original patch by Sridhar Ratnakumar.

5693 5694 5695
- Issue #6286: Now Distutils upload command is based on urllib2 instead of
  httplib, allowing the usage of http_proxy.

5696 5697
- Issue #6287: Added the license field in Distutils documentation.

5698 5699
- Issue #6263: Fixed syntax error in distutils.cygwincompiler.

5700 5701 5702 5703
- Issue #5201: distutils.sysconfig.parse_makefile() now understands `$$`
  in Makefiles. This prevents compile errors when using syntax like:
  `LDFLAGS='-rpath=\$$LIB:/some/other/path'`. Patch by Floris Bruynooghe.

5704 5705 5706
- Issue #6131: test_modulefinder leaked when run after test_distutils.
  Patch by Hirokazu Yamamoto.

5707 5708
- Issue #6048: Now Distutils uses the tarfile module in archive_util.

5709
- Issue #6062: In distutils, fixed the package option of build_ext. Feedback
5710 5711
  and tests on pywin32 by Tim Golden.

5712 5713
- Issue #6053: Fixed distutils tests on win32. patch by Hirokazu Yamamoto.

5714 5715 5716
- Issue #6046: Fixed the library extension when distutils build_ext is used
  inplace. Initial patch by Roumen Petrov.

5717
- Issue #6041: Now distutils `sdist` and `register` commands use `check` as a
5718 5719
  subcommand.

5720 5721 5722
- Issue #6022: a test file was created in the current working directory by
  test_get_outputs in Distutils.

5723 5724 5725
- Issue #5977: distutils build_ext.get_outputs was not taking into account the
  inplace option. Initial patch by kxroberto.

5726 5727 5728
- Issue #5984: distutils.command.build_ext.check_extensions_list checks were broken
  for old-style extensions.

5729 5730
- Issue #5976: Fixed Distutils test_check_environ.

5731 5732 5733 5734 5735
- Issue #5941: Distutils build_clib command was not working anymore because
  of an incomplete costumization of the archiver command. Added ARFLAGS in the
  Makefile besides AR and make Distutils use it. Original patch by David
  Cournapeau.

5736 5737
- Issue #2245: aifc now skips chunk types it doesn't recognize, per spec.

5738
- Issue #5874: distutils.tests.test_config_cmd is not locale-sensitive
5739 5740
  anymore.

5741
- Issue #5810: Fixed Distutils test_build_scripts so it uses
5742 5743
  sysconfig.get_config_vars.

5744 5745
- Issue #4951: Fixed failure in test_httpservers.

Thomas Heller's avatar
Thomas Heller committed
5746 5747
- Issue #5795: Fixed test_distutils failure on Debian ppc.

5748 5749
- Issue #5607: fixed Distutils test_get_platform for Mac OS X fat binaries.

5750 5751 5752
- Issue #5741: don't disallow "%%" (which is an escape for "%") when setting
  a value in SafeConfigParser.

5753 5754
- Issue #5732: added a new command in Distutils: check.

5755
- Issue #5731: Distutils bdist_wininst no longer worked on non-Windows
5756 5757
  platforms. Initial patch by Paul Moore.

5758 5759 5760
- Issue #5095: Added bdist_msi to the list of bdist supported formats.
  Initial fix by Steven Bethard.

5761 5762 5763
- Issue #1491431: Fixed distutils.filelist.glob_to_re for edge cases.
  Initial fix by Wayne Davison.

5764
- Issue #5694: removed spurious test output in Distutils (test_clean).
5765

5766
- Issue #1326077: fix the formatting of SyntaxErrors by the traceback module.
5767

5768 5769 5770 5771
- Issue #1665206 (partially): Move imports in cgitb to the top of the module
  instead of performing them in functions. Helps prevent import deadlocking in
  threads.

5772 5773 5774 5775
- Issue #2522: locale.format now checks its first argument to ensure it has
  been passed only one pattern, avoiding mysterious errors where it appeared
  that it was failing to do localization.

5776 5777 5778
- Issue #5583: Added optional Extensions in Distutils. Initial patch by Georg
  Brandl.

5779 5780 5781
- Issue #1222: locale.format() bug when the thousands separator is a space
  character.

5782 5783 5784
- Issue #5472: Fixed distutils.test_util tear down. Original patch by
  Tim Golden.

5785 5786
- collections.deque() objects now have a read-only attribute called maxlen.

5787 5788 5789 5790
- Issue #2638: Show a window constructed with tkSimpleDialog.Dialog only after
  it is has been populated and properly configured in order to prevent
  window flashing.

5791 5792 5793 5794 5795 5796
- Issue #4792: Prevent a segfault in _tkinter by using the
  guaranteed to be safe interp argument given to the PythonCmd in place of
  the Tcl interpreter taken from a PythonCmd_ClientData.

- Issue #5193: Guarantee that tkinter.Text.search returns a string.

5797 5798 5799
- Issue #5394: removed > 2.3 syntax from distutils.msvc9compiler.
  Original patch by Akira Kitada.

5800 5801
- Issue #5334: array.fromfile() failed to insert values when EOFError was raised.

5802 5803
- Issue #5385: Fixed mmap crash after resize failure on windows.

5804 5805
- Issue #5179: Fixed subprocess handle leak on failure on windows.

Raymond Hettinger's avatar
Raymond Hettinger committed
5806 5807
- PEP 372:  Added collections.OrderedDict().

5808 5809
- The _asdict() for method for namedtuples now returns an OrderedDict().

5810 5811
- configparser now defaults to using an ordered dictionary.

Benjamin Peterson's avatar
Benjamin Peterson committed
5812 5813 5814
- Issue #5401: Fixed a performance problem in mimetypes when ``from mimetypes
  import guess_extension`` was used.

5815 5816 5817
- Issue #1733986: Fixed mmap crash in accessing elements of second map object
  with same tagname but larger size than first map. (Windows)

5818 5819 5820
- Issue #5386: mmap.write_byte didn't check map size, so it could cause buffer
  overrun.

5821
- Issue #1533164: Installed but not listed ``*.pyo`` was breaking Distutils
5822 5823 5824 5825
  bdist_rpm command.

- Issue #5378: added --quiet option to Distutils bdist_rpm command.

5826 5827
- Issue #5052: make Distutils compatible with 2.3 again.

5828 5829
- Issue #5316: Fixed buildbot failures introduced by multiple inheritance
  in Distutils tests.
Barry Warsaw's avatar
Barry Warsaw committed
5830

5831 5832 5833
- Issue #5287: Add exception handling around findCaller() call to help out
  IronPython.

5834 5835 5836 5837 5838
- Issue #5282: Fixed mmap resize on 32bit windows and unix. When offset > 0,
  The file was resized to wrong size.

- Issue #5292: Fixed mmap crash on its boundary access m[len(m)].

5839
- Issue #2279: distutils.sdist.add_defaults now add files
5840 5841
  from the package_data and the data_files metadata.

5842
- Issue #5257: refactored all tests in distutils, so they use
5843 5844
  support.TempdirManager, to avoid writing in the tests directory.

5845 5846 5847
- Issue #4524: distutils build_script command failed with --with-suffix=3.
  Initial patch by Amaury Forgeot d'Arc.

5848 5849
- Issue #2461: added tests for distutils.util

5850 5851 5852 5853
- Issue #4998: The memory saving effect of __slots__ had been lost on Fractions
  which inherited from numbers.py which did not have __slots__ defined.  The
  numbers hierarchy now has its own __slots__ declarations.

5854 5855 5856
- Issue #4631: Fix urlopen() result when an HTTP response uses chunked
  encoding.

5857 5858 5859
- Issue #5203: Fixed ctypes segfaults when passing a unicode string to a
  function without argtypes (only occurs if HAVE_USABLE_WCHAR_T is false).

5860 5861 5862
- Issue #3386: distutils.sysconfig.get_python_lib prefix argument was ignored
  under NT and OS2. Patch by Philip Jenvey.

5863 5864 5865 5866
- Issue #5128: Make compileall properly inspect bytecode to determine if needs
  to be recreated. This avoids a timing hole thanks to the old reliance on the
  ctime of the files involved.

5867 5868 5869
- Issue #5122: Synchronize tk load failure check to prevent a potential
  deadlock.

5870 5871 5872 5873
- Issue #1818: collections.namedtuple() now supports a keyword argument
  'rename' which lets invalid fieldnames be automatically converted to
  positional names in the form, _1, _2, ...

5874 5875
- Issue #4890: Handle empty text search pattern in Tkinter.Text.search.

5876 5877 5878
- Issue #4512 (part 2): Promote ``ZipImporter._get_filename()`` to be a
  public documented method ``ZipImporter.get_filename()``.

5879 5880 5881 5882 5883
- Issue #4195: The ``runpy`` module (and the ``-m`` switch) now support
  the execution of packages by looking for and executing a ``__main__``
  submodule when a package name is supplied. Initial patch by Andi
  Vajda.

5884 5885 5886 5887 5888
- Issue #1731706: Call Tcl_ConditionFinalize for Tcl_Conditions that will
  not be used again (this requires Tcl/Tk 8.3.1), also fix a memory leak in
  Tkapp_Call when calling from a thread different than the one that created
  the Tcl interpreter. Patch by Robert Hancock.

5889 5890 5891
- Issue #4285: Change sys.version_info to be a named tuple. Patch by
  Ross Light.

5892
- Issue #1520877: Now distutils.sysconfig reads $AR from the
5893 5894
  environment/Makefile. Patch by Douglas Greiman.

5895 5896 5897
- Issue #1276768: The verbose option was not used in the code of
  distutils.file_util and distutils.dir_util.

5898
- Issue #5132: Fixed trouble building extensions under Solaris with
5899 5900
  --enabled-shared activated. Initial patch by Dave Peterson.

5901 5902
- Issue #1581476: Always use the Tcl global namespace when calling into Tcl.

5903 5904
- The shelve module now defaults to pickle protocol 3.

5905 5906 5907
- Fix a bug in the trace module where a bytes object from co_lnotab had its
  items being passed through ord().

5908 5909 5910 5911
- Issue #2047: shutil.move() could believe that its destination path was
  inside its source path if it began with the same letters (e.g. "src" vs.
  "src.new").

5912 5913
- Added the ttk module. See issue #2983: Ttk support for Tkinter.

5914 5915 5916 5917
- Removed isSequenceType(), isMappingType, and isNumberType() from the
  operator module; use the abstract base classes instead.  Also removed
  the repeat() function; use mul() instead.

5918
- Issue #5021:  doctest.testfile() did not create __name__ and
5919 5920 5921 5922 5923
  collections.namedtuple() relied on __name__ being defined.

- Backport importlib from Python 3.1. Only the import_module() function has
  been backported to help facilitate transitions from 2.7 to 3.1.

5924 5925 5926
- Issue #1885: distutils. When running sdist with --formats=tar,gztar
  the tar file was overriden by the gztar one.

5927 5928
- Issue #4863: distutils.mwerkscompiler has been removed.

5929 5930
- Added a new itertools functions:  combinations_with_replacement()
  and compress().
5931

5932
- Issue #5032:  added a step argument to itertools.count() and
5933 5934
  allowed non-integer arguments.

Jesse Noller's avatar
Jesse Noller committed
5935 5936 5937 5938
- Fix and properly document the multiprocessing module's logging
  support, expose the internal levels and provide proper usage
  examples.

5939 5940 5941
- Issue #1672332: fix unpickling of subnormal floats, which was
  producing a ValueError on some platforms.

5942 5943 5944
- Issue #3881: Help Tcl to load even when started through the
  unreadable local symlink to "Program Files" on Vista.

5945 5946 5947
- Issue #4710: Extract directories properly in the zipfile module;
  allow adding directories to a zipfile.

5948
- Issue #3807: _multiprocessing build fails when configure is passed
Jesse Noller's avatar
Jesse Noller committed
5949 5950 5951
  --without-threads argument. When this occurs, _multiprocessing will
  be disabled, and not compiled.

5952 5953 5954 5955 5956
- Issue #5008: When a file is opened in append mode with the new IO library,
  do an explicit seek to the end of file (so that e.g. tell() returns the
  file size rather than 0). This is consistent with the behaviour of the
  traditional 2.x file object.

5957 5958 5959
- Issue #5013: Fixed a bug in FileHandler which occurred when the delay
  parameter was set.

5960 5961 5962
- Issue #4842: Always append a trailing 'L' when pickling longs using
  pickle protocol 0.  When reading, the 'L' is optional.

5963 5964
- Add the importlib package.

Jesse Noller's avatar
Jesse Noller committed
5965 5966 5967
- Issue #4301: Patch the logging module to add processName support, remove
  _check_logger_class from multiprocessing.

5968
- Issue #3325: Remove python2.x try: except: imports for old cPickle from
5969
  multiprocessing.
5970

5971 5972 5973
- Issue #4959: inspect.formatargspec now works for keyword only arguments
  without defaults.

5974 5975
- Issue #3321: ``_multiprocessing.Connection()`` doesn't check handle; added checks
  for Unix machines for negative handles and large int handles. Without this check
Jesse Noller's avatar
Jesse Noller committed
5976 5977
  it is possible to segfault the interpreter.

5978 5979 5980 5981 5982 5983
- Issue #4449: AssertionError in mp_benchmarks.py, caused by an underlying issue
  in sharedctypes.py.

- Issue #1225107: inspect.isclass() returned True for instances with a custom
  __getattr__.

5984 5985 5986 5987
- Issue #3826 and #4791: The socket module now closes the underlying socket
  appropriately when it is being used via socket.makefile() objects
  rather than delaying the close by waiting for garbage collection to do it.

5988 5989 5990
- Issue #1696199:  Add collections.Counter() for rapid and convenient
  counting.

5991 5992
- Issue #3860: GzipFile and BZ2File now support the context manager protocol.

5993 5994 5995
- Issue #4867: Fixed a crash in ctypes when passing a string to a
  function without defining argtypes.

5996 5997 5998 5999 6000
- Issue #4272: Add an optional argument to the GzipFile constructor to override
  the timestamp in the gzip stream. The default value remains the current time.
  The information can be used by e.g. gunzip when decompressing. Patch by
  Jacques Frechet.

6001 6002
- Restore Python 2.3 compatibility for decimal.py.

6003 6004 6005
- Issue #3638: Remove functions from _tkinter module level that depend on
  TkappObject to work with multiple threads.

6006 6007
- Issue #4718: Adapt the wsgiref package so that it actually works with
  Python 3.x, in accordance with the `official amendments of the spec
6008 6009
  <http://www.wsgi.org/wsgi/Amendments_1.0>`_.

6010 6011 6012
- Issue #4796: Added Decimal.from_float() and Context.create_decimal_from_float()
  to the decimal module.

6013 6014 6015
- Fractions.from_float() no longer loses precision for integers too big to
  cast as floats.

6016 6017 6018
- Issue #4812: add missing underscore prefix to some internal-use-only
  constants in the decimal module.  (Dec_0 becomes _Dec_0, etc.)

6019
- Issue #4790: The nsmallest() and nlargest() functions in the heapq module
6020 6021
  did unnecessary work in the common case where no key function was specified.

6022 6023 6024
- Issue #4795: inspect.isgeneratorfunction() returns False instead of None when
  the function is not a generator.

6025 6026
- Issue #4702: Throwing a DistutilsPlatformError instead of IOError in case
  no MSVC compiler is found under Windows. Original patch by Philip Jenvey.
6027

6028
- Issue #4646: distutils was choking on empty options arg in the setup
6029 6030
  function. Original patch by Thomas Heller.

6031 6032
- Issue #3767: Convert Tk object to string in tkColorChooser.

6033 6034
- Issue #3248: Allow placing ScrolledText in a PanedWindow.

6035 6036 6037
- Issue #4444: Allow assertRaises() to be used as a context handler, so that
  the code under test can be written inline if more practical.

6038 6039 6040
- Issue #4739: Add pydoc help topics for symbols, so that e.g. help('@')
  works as expected in the interactive environment.

6041 6042 6043
- Issue #4756: zipfile.is_zipfile() now supports file-like objects. Patch by
  Gabriel Genellina.

6044 6045 6046
- Issue #4574: reading an UTF16-encoded text file crashes if \r on 64-char
  boundary.

6047 6048 6049 6050 6051 6052 6053 6054 6055 6056 6057 6058 6059 6060 6061 6062 6063 6064 6065
- Issue #4223: inspect.getsource() will now correctly display source code
  for packages loaded via zipimport (or any other conformant PEP 302
  loader). Original patch by Alexander Belopolsky.

- Issue #4201: pdb can now access and display source code loaded via
  zipimport (or any other conformant PEP 302 loader). Original patch by
  Alexander Belopolsky.

- Issue #4197: doctests in modules loaded via zipimport (or any other PEP
  302 conformant loader) will now work correctly in most cases (they
  are still subject to the constraints that exist for all code running
  from inside a module loaded via a PEP 302 loader and attempting to
  perform IO operations based on __file__). Original patch by
  Alexander Belopolsky.

- Issues #4082 and #4512: Add runpy support to zipimport in a manner that
  allows backporting to maintenance branches. Original patch by
  Alexander Belopolsky.

6066 6067 6068
- Issue #4163: textwrap module: allow word splitting on a hyphen preceded by
  a non-ASCII letter.

6069 6070
- Issue #4616: TarFile.utime(): Restore directory times on Windows.

6071 6072 6073
- Issue #4021: tokenize.detect_encoding() now raises a SyntaxError when the
  codec cannot be found.  This is for compatibility with the builtin behavior.

6074 6075 6076 6077
- Issue #4084: Fix max, min, max_mag and min_mag Decimal methods to
  give correct results in the case where one argument is a quiet NaN
  and the other is a finite number that requires rounding.

6078 6079 6080
- Issue #4483: _dbm module now builds on systems with gdbm & gdbm_compat
  libs.

6081 6082 6083 6084 6085 6086 6087 6088 6089 6090 6091 6092 6093 6094 6095 6096
- Added the subprocess.check_call_output() convenience function to get output
  from a subprocess on success or raise an exception on error.

- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
  support unusual filenames (such as those containing semi-colons) in
  Content-Disposition headers.

- Issue #4384: Added logging integration with warnings module using
  captureWarnings(). This change includes a NullHandler which does nothing;
  it will be of use to library developers who want to avoid the "No handlers
  could be found for logger XXX" message which can appear if the library user
  doesn't configure logging.

- Issue #3741: DISTUTILS_USE_SDK set causes msvc9compiler.py to raise an
  exception.

6097 6098 6099 6100 6101 6102 6103 6104 6105
- Issue #4529: fix the parser module's validation of try-except-finally
  statements.

- Issue #4458: getopt.gnu_getopt() now recognizes a single "-" as an argument,
  not a malformed option.

- Added the subprocess.check_output() convenience function to get output
  from a subprocess on success or raise an exception on error.

6106 6107 6108
- Issue #4542: On Windows, binascii.crc32 still accepted str as binary input;
  the corresponding tests now pass.

6109 6110 6111
- Issue #4537: webbrowser.UnixBrowser would fail to open the browser because
  it was calling the wrong open() function.

6112 6113 6114 6115
- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
  support unusual filenames (such as those containing semi-colons) in
  Content-Disposition headers.

6116 6117 6118
- Issue #4861: ctypes.util.find_library(): Robustify. Fix library detection on
  biarch systems. Try to rely on ldconfig only, without using objdump and gcc.

Benjamin Peterson's avatar
Benjamin Peterson committed
6119 6120 6121 6122
- Issue #5104: The socket module now raises OverflowError when 16-bit port and
  protocol numbers are supplied outside the allowed 0-65536 range on bind()
  and getservbyport().

6123 6124
- Windows locale mapping updated to Vista.

6125 6126 6127
Tools/Demos
-----------

6128 6129 6130
- Issue #4704: remove use of cmp() in pybench, bump its version number to 2.1,
  and make it 2.6-compatible.

6131 6132
- Ttk demos added in Demo/tkinter/ttk/

6133 6134
- Issue #4677: add two list comprehension tests to pybench.

6135 6136 6137 6138

Build
-----

6139 6140
- Issue #6094: Build correctly with Subversion 1.7.

6141 6142
- Issue #5847: Remove -n switch on "Edit with IDLE" menu item.

6143 6144 6145
- Issue #5726: Make Modules/ld_so_aix return the actual exit code of the
  linker, rather than always exit successfully. Patch by Floris Bruynooghe.

6146
- Issue #4587: Add configure option --with-dbmliborder=db1:db2:... to specify
6147
  the order that backends for the dbm extension are checked.
6148

6149 6150
- Link the shared python library with $(MODLIBS).

6151 6152
- Issue #5134: Silence compiler warnings when compiling sqlite with VC++.

6153 6154
- Issue #4494: Fix build with Py_NO_ENABLE_SHARED on Windows.

6155 6156
- Issue #4895: Use _strdup on Windows CE.

6157 6158 6159 6160 6161 6162 6163 6164 6165 6166 6167 6168 6169 6170 6171 6172 6173 6174 6175 6176 6177 6178 6179 6180
- Issue #4472: "configure --enable-shared" now works on OSX

- Issues #4728 and #4060: WORDS_BIGEDIAN is now correct in Universal builds.

- Issue #4389: Add icon to the uninstall entry in "add-and-remove-programs".

- Issue #4289: Remove Cancel button from AdvancedDlg.

- Issue #1656675: Register a drop handler for .py* files on Windows.

- Issue #4120: Exclude manifest from extension modules in VS2008.

- Issue #4091: Install pythonxy.dll in system32 again.

- Issue #4018: Disable "for me" installations on Vista.

- Issue #3758: Add ``patchcheck`` build target to .PHONY.

- Issue #4204: Fixed module build errors on FreeBSD 4.


C-API
-----

6181 6182 6183
- Issue #6624: yArg_ParseTuple with "s" format when parsing argument with
  NUL: Bogus TypeError detail string.

6184 6185 6186
- Issue #5175: PyLong_AsUnsignedLongLong now raises OverflowError
  for negative arguments.  Previously, it raised TypeError.

6187 6188 6189 6190 6191 6192 6193 6194 6195
- Issue #4720: The format for PyArg_ParseTupleAndKeywords can begin with '|'.

- Issue #3632: from the gdb debugger, the 'pyo' macro can now be called when
  the GIL is released, or owned by another thread.

- Issue #4122: On Windows, fix a compilation error when using the
  Py_UNICODE_ISSPACE macro in an extension module.


6196 6197 6198
Extension Modules
-----------------

6199 6200 6201 6202
- Issue #3745: Fix hashlib to always reject unicode and non buffer-api
  supporting objects as input no matter how it was compiled (built in
  implementations or external openssl library).

6203 6204
- Issue #4397: Fix occasional test_socket failure on OS X.

6205 6206
- Issue #4279: Fix build of parsermodule under Cygwin.

6207 6208 6209 6210
- Issue #4751: hashlib now releases the GIL when hashing large buffers
  (with a hardwired threshold of 2048 bytes), allowing better parallelization
  on multi-CPU systems. Contributed by Lukas Lueg (ebfe) and Victor Stinner.

6211 6212
- Issue #4051: Prevent conflict of UNICODE macros in cPickle.

6213 6214 6215 6216
- Issue #4738: Each zlib object now has a separate lock, allowing to compress
  or decompress several streams at once on multi-CPU systems. Also, the GIL
  is now released when computing the CRC of a large buffer. Patch by ebfe.

6217 6218
- Issue #4228: Pack negative values the same way as 2.4 in struct's L format.

6219 6220
- Issue #1040026: Fix os.times result on systems where HZ is incorrect.

6221 6222
- Issues #3167, #3682: Fix test_math failures for log, log10 on Solaris,
  OpenBSD.
6223

6224 6225 6226 6227
- Issue #4583: array.array would not always prohibit resizing when a buffer
  has been exported, resulting in an interpreter crash when accessing the
  buffer.

6228

6229 6230
- Issue #5228: Make functools.partial objects can now be pickled.

6231 6232 6233
Tests
-----

6234 6235 6236
- Issue #6152: New option '-j'/'--multiprocess' for regrtest allows running
  regression tests in parallel, shortening the total runtime.

6237 6238 6239 6240 6241
- Issue #5450: Moved tests involving loading tk from Lib/test/test_tcl to
  Lib/tkinter/test/test_tkinter/test_loadtk. With this, these tests demonstrate
  the same behaviour as test_ttkguionly (and now also test_tk) which is to
  skip the tests if DISPLAY is defined but can't be used.

6242
- regrtest no longer treats ImportError as equivalent to SkipTest.  Imports
6243
  that should cause a test to be skipped are now done using import_module
6244 6245
  from test support, which does the conversion.

6246 6247 6248
- Issue #5083: New 'gui' resource for regrtest.


6249 6250 6251
Docs
----

6252

6253
**(For information about older versions, consult the HISTORY file.)**