Tests
-----
-- Issue #17833: Fix test_gdb failures seen on machines where debug symbols
- for glibc are available (seen on PPC64 Linux).
+- Issue #17756: Fix test_code test when run from the installed location.
-- Issue #7855: Add tests for ctypes/winreg for issues found in IronPython.
- Initial patch by Dino Viehland.
+- Issue #17752: Fix distutils tests when run from the installed location.
-- Issue #17712: Fix test_gdb failures on Ubuntu 13.04.
+IDLE
+----
-- Issue #17835: Fix test_io when the default OS pipe buffer size is larger
- than one million bytes.
+- Issue #18104: Add idlelib/idle_test/htest.py with a few sample tests to begin
+ consolidating and improving human-validated tests of Idle. Change other files
+ as needed to work with htest. Running the module as __main__ runs all tests.
-- Issue #17065: Use process-unique key for winreg tests to avoid failures if
- test is run multiple times in parallel (eg: on a buildbot host).
-- Issue #12820: add tests for the xml.dom.minicompat module.
- Patch by John Chandler and Phil Connell.
+What's New in Python 3.4.1rc1?
+==============================
-- Issue #17790: test_set now works with unittest test discovery.
- Patch by Zachary Ware.
+Release date: 2014-05-05
-- Issue #17789: test_random now works with unittest test discovery.
- Patch by Zachary Ware.
+Core and Builtins
+-----------------
-- Issue #17779: test_osx_env now works with unittest test discovery.
- Patch by Zachary Ware.
+- Issue #21274: Define PATH_MAX for GNU/Hurd in Python/pythonrun.c.
-- Issue #17766: test_iterlen now works with unittest test discovery.
- Patch by Zachary Ware.
+- Issue #21209: Fix sending tuples to custom generator objects with the yield
+ from syntax.
-- Issue #17690: test_time now works with unittest test discovery.
- Patch by Zachary Ware.
+- Issue #21134: Fix segfault when str is called on an uninitialized
+ UnicodeEncodeError, UnicodeDecodeError, or UnicodeTranslateError object.
-- Issue #17692: test_sqlite now works with unittest test discovery.
- Patch by Zachary Ware.
+- Issue #19537: Fix PyUnicode_DATA() alignment under m68k. Patch by
+ Andreas Schwab.
-- Issue #17843: Removed bz2 test data file that was triggering false-positive
- virus warnings with certain antivirus software.
+- Issue #20929: Add a type cast to avoid shifting a negative number.
-Documentation
--------------
+- Issue #20731: Properly position in source code files even if they
+ are opened in text mode. Patch by Serhiy Storchaka.
-- Issue #15940: Specify effect of locale on time functions.
+- Issue #20637: Key-sharing now also works for instance dictionaries of
+ subclasses. Patch by Peter Ingebretson.
-- Issue #6696: add documentation for the Profile objects, and improve
- profile/cProfile docs. Patch by Tom Pinckney.
+- Issue #12546: Allow ``\x00`` to be used as a fill character when using str, int,
+ float, and complex __format__ methods.
+
+- Issue #13598: Modify string.Formatter to support auto-numbering of
+ replacement fields. It now matches the behavior of str.format() in
+ this regard. Patches by Phil Elson and Ramchandra Apte.
+
+Library
+-------
+
+- Issue #21088: Bugfix for curses.window.addch() regression in 3.4.0.
+ In porting to Argument Clinic, the first two arguments were reversed.
+
+- Issue #21469: Reduced the risk of false positives in robotparser by
+ checking to make sure that robots.txt has been read or does not exist
+ prior to returning True in can_fetch().
+
+- Issue #21321: itertools.islice() now releases the reference to the source
+ iterator when the slice is exhausted. Patch by Anton Afanasyev.
+
+- Issue #9815: assertRaises now tries to clear references to local variables
+ in the exception's traceback.
+
+- Issue #13204: Calling sys.flags.__new__ would crash the interpreter,
+ now it raises a TypeError.
+
+- Issue #19385: Make operations on a closed dbm.dumb database always raise the
+ same exception.
+
+- Issue #21207: Detect when the os.urandom cached fd has been closed or
+ replaced, and open it anew.
+
+- Issue #21291: subprocess's Popen.wait() is now thread safe so that
+ multiple threads may be calling wait() or poll() on a Popen instance
+ at the same time without losing the Popen.returncode value.
+
+- Issue #21127: Path objects can now be instantiated from str subclass
+ instances (such as ``numpy.str_``).
+
+- Issue #15002: urllib.response object to use _TemporaryFileWrapper (and
+ _TemporaryFileCloser) facility. Provides a better way to handle file
+ descriptor close. Patch contributed by Christian Theune.
+
+- Issue #12220: mindom now raises a custom ValueError indicating it doesn't
+ support spaces in URIs instead of letting a 'split' ValueError bubble up.
+
+- Issue #21239: patch.stopall() didn't work deterministically when the same
+ name was patched more than once.
+
+- Issue #21222: Passing name keyword argument to mock.create_autospec now
+ works.
+
+- Issue #21197: Add lib64 -> lib symlink in venvs on 64-bit non-OS X POSIX.
+
+- Issue #17498: Some SMTP servers disconnect after certain errors, violating
+ strict RFC conformance. Instead of losing the error code when we issue the
+ subsequent RSET, smtplib now returns the error code and defers raising the
+ SMTPServerDisconnected error until the next command is issued.
+
+- Issue #17826: setting an iterable side_effect on a mock function created by
+ create_autospec now works. Patch by Kushal Das.
+
+- Issue #7776: Fix ``Host:`` header and reconnection when using
+ http.client.HTTPConnection.set_tunnel(). Patch by Nikolaus Rath.
+
+- Issue #20968: unittest.mock.MagicMock now supports division.
+ Patch by Johannes Baiter.
+
- - Fix arbitrary memory access in JSONDecoder.raw_decode with a negative second
- parameter. Bug reported by Guido Vranken.
++- Issue #21529 (CVE-2014-4616): Fix arbitrary memory access in
++ JSONDecoder.raw_decode with a negative second parameter. Bug reported by Guido
++ Vranken.
+
+- Issue #21169: getpass now handles non-ascii characters that the
+ input stream encoding cannot encode by re-encoding using the
+ replace error handler.
+
+- Issue #21171: Fixed undocumented filter API of the rot13 codec.
+ Patch by Berker Peksag.
+
+- Issue #21172: isinstance check relaxed from dict to collections.Mapping.
+
+- Issue #21155: asyncio.EventLoop.create_unix_server() now raises a ValueError
+ if path and sock are specified at the same time.
+
+- Issue #21149: Improved thread-safety in logging cleanup during interpreter
+ shutdown. Thanks to Devin Jeanpierre for the patch.
+
+- Issue #20145: `assertRaisesRegex` and `assertWarnsRegex` now raise a
+ TypeError if the second argument is not a string or compiled regex.
+
+- Issue #21058: Fix a leak of file descriptor in
+ :func:`tempfile.NamedTemporaryFile`, close the file descriptor if
+ :func:`io.open` fails
+
+- Issue #21200: Return None from pkgutil.get_loader() when __spec__ is missing.
+
+- Issue #21013: Enhance ssl.create_default_context() when used for server side
+ sockets to provide better security by default.
+
+- Issue #20633: Replace relative import by absolute import.
+
+- Issue #20980: Stop wrapping exception when using ThreadPool.
+
+- Issue #21082: In os.makedirs, do not set the process-wide umask. Note this
+ changes behavior of makedirs when exist_ok=True.
+
+- Issue #20990: Fix issues found by pyflakes for multiprocessing.
+
+- Issue #21015: SSL contexts will now automatically select an elliptic
+ curve for ECDH key exchange on OpenSSL 1.0.2 and later, and otherwise
+ default to "prime256v1".
+
+- Issue #20995: Enhance default ciphers used by the ssl module to enable
+ better security an prioritize perfect forward secrecy.
+
+- Issue #20884: Don't assume that __file__ is defined on importlib.__init__.
+
+- Issue #21499: Ignore __builtins__ in several test_importlib.test_api tests.
+
+- Issue #20879: Delay the initialization of encoding and decoding tables for
+ base32, ascii85 and base85 codecs in the base64 module, and delay the
+ initialization of the unquote_to_bytes() table of the urllib.parse module, to
+ not waste memory if these modules are not used.
+
+- Issue #19157: Include the broadcast address in the usuable hosts for IPv6
+ in ipaddress.
+
+- Issue #11599: When an external command (e.g. compiler) fails, distutils now
+ prints out the whole command line (instead of just the command name) if the
+ environment variable DISTUTILS_DEBUG is set.
+
+- Issue #4931: distutils should not produce unhelpful "error: None" messages
+ anymore. distutils.util.grok_environment_error is kept but doc-deprecated.
+
+- Issue #20875: Prevent possible gzip "'read' is not defined" NameError.
+ Patch by Claudiu Popa.
+
+- Issue #11558: ``email.message.Message.attach`` now returns a more
+ useful error message if ``attach`` is called on a message for which
+ ``is_multipart`` is False.
+
+- Issue #20283: RE pattern methods now accept the string keyword parameters
+ as documented. The pattern and source keyword parameters are left as
+ deprecated aliases.
+
+- Issue #20778: Fix modulefinder to work with bytecode-only modules.
+
+- Issue #20791: copy.copy() now doesn't make a copy when the input is
+ a bytes object. Initial patch by Peter Otten.
+
+- Issue #19748: On AIX, time.mktime() now raises an OverflowError for year
+ outsize range [1902; 2037].
+
+- Issue #20816: Fix inspect.getcallargs() to raise correct TypeError for
+ missing keyword-only arguments. Patch by Jeremiah Lowin.
+
+- Issue #20817: Fix inspect.getcallargs() to fail correctly if more
+ than 3 arguments are missing. Patch by Jeremiah Lowin.
+
+- Issue #6676: Ensure a meaningful exception is raised when attempting
+ to parse more than one XML document per pyexpat xmlparser instance.
+ (Original patches by Hirokazu Yamamoto and Amaury Forgeot d'Arc, with
+ suggested wording by David Gutteridge)
+
+- Issue #21117: Fix inspect.signature to better support functools.partial.
+ Due to the specifics of functools.partial implementation,
+ positional-or-keyword arguments passed as keyword arguments become
+ keyword-only.
+
+- Issue #21209: Fix asyncio.tasks.CoroWrapper to workaround a bug
+ in yield-from implementation in CPythons prior to 3.4.1.
+
+- asyncio: Add gi_{frame,running,code} properties to CoroWrapper
+ (upstream issue #163).
+
+- Issue #21311: Avoid exception in _osx_support with non-standard compiler
+ configurations. Patch by John Szakmeister.
+
+- Issue #11571: Ensure that the turtle window becomes the topmost window
+ when launched on OS X.
+
+Extension Modules
+-----------------
+
+- Issue #21276: posixmodule: Don't define USE_XATTRS on KFreeBSD and the Hurd.
+
+- Issue #21226: Set up modules properly in PyImport_ExecCodeModuleObject
+ (and friends).
+
+IDLE
+----
+
+- Issue #21139: Change default paragraph width to 72, the PEP 8 recommendation.
+
+- Issue #21284: Paragraph reformat test passes after user changes reformat width.
+
+- Issue #17654: Ensure IDLE menus are customized properly on OS X for
+ non-framework builds and for all variants of Tk.
+
+Build
+-----
+
+- The Windows build now includes OpenSSL 1.0.1g
+
+- Issue #21285: Refactor and fix curses configure check to always search
+ in a ncursesw directory.
+
+- Issue #15234: For BerkelyDB and Sqlite, only add the found library and
+ include directories if they aren't already being searched. This avoids
+ an explicit runtime library dependency.
+
+- Issue #20644: OS X installer build support for documentation build changes
+ in 3.4.1: assume externally supplied sphinx-build is available in /usr/bin.
+
+C API
+-----
+
+- Issue #20942: PyImport_ImportFrozenModuleObject() no longer sets __file__ to
+ match what importlib does; this affects _frozen_importlib as well as any
+ module loaded using imp.init_frozen().
+
+Documentation
+-------------
+
+- Issue #17386: Expanded functionality of the ``Doc/make.bat`` script to make
+ it much more comparable to ``Doc/Makefile``.
+
+- Issue #21043: Remove the recommendation for specific CA organizations and to
+ mention the ability to load the OS certificates.
+
+- Issue #20765: Add missing documentation for PurePath.with_name() and
+ PurePath.with_suffix().
+
+- Issue #19407: New package installation and distribution guides based on
+ the Python Packaging Authority tools. Existing guides have been retained
+ as legacy links from the distutils docs, as they still contain some
+ required reference material for tool developers that isn't recorded
+ anywhere else.
+
+- Issue #19697: Document cases where __main__.__spec__ is None.
+
+Tests
+-----
+
+- Issue #18604: Consolidated checks for GUI availability. All platforms now
+ at least check whether Tk can be instantiated when the GUI resource is
+ requested.
+
+- Issue #21275: Fix a socket test on KFreeBSD.
+
+- Issue #21223: Pass test_site/test_startup_imports when some of the extensions
+ are built as builtins.
+
+- Issue #20635: Added tests for Tk geometry managers.
+
+- Add test case for freeze.
+
+- Issue #20743: Fix a reference leak in test_tcl.
+
+- Issue #21097: Move test_namespace_pkgs into test_importlib.
+
+- Issue #20939: Avoid various network test failures due to new
+ redirect of http://www.python.org/ to https://www.python.org:
+ use http://www.example.com instead.
+
+- Issue #20668: asyncio tests no longer rely on tests.txt file.
+ (Patch by Vajrasky Kok)
+
+- Issue #21093: Prevent failures of ctypes test_macholib on OS X if a
+ copy of libz exists in $HOME/lib or /usr/local/lib.
+
+Tools/Demos
+-----------
+
+- Add support for ``yield from`` to 2to3.
+
+- Add support for the PEP 465 matrix multiplication operator to 2to3.
+
+- Issue #16047: Fix module exception list and __file__ handling in freeze.
+ Patch by Meador Inge.
+
+- Issue #11824: Consider ABI tags in freeze. Patch by Meador Inge.
+
+- Issue #20535: PYTHONWARNING no longer affects the run_tests.py script.
+ Patch by Arfrever Frehtes Taifersar Arahesis.
+
+
+What's New in Python 3.4.0?
+===========================
+
+Release date: 2014-03-16
+
+Library
+-------
+
+- Issue #20939: Fix test_geturl failure in test_urllibnet due to
+ new redirect of http://www.python.org/ to https://www.python.org.
+
+Documentation
+-------------
+
+- Merge in all documentation changes since branching 3.4.0rc1.
+
+
+What's New in Python 3.4.0 release candidate 3?
+===============================================
+
+Release date: 2014-03-09
+
+Core and Builtins
+-----------------
+
+- Issue #20786: Fix signatures for dict.__delitem__ and
+ property.__delete__ builtins.
+
+Library
+-------
+
+- Issue #20839: Don't trigger a DeprecationWarning in the still supported
+ pkgutil.get_loader() API when __loader__ isn't set on a module (nor
+ when pkgutil.find_loader() is called directly).
+
+Build
+-----
+
+- Issue #14512: Launch pydoc -b instead of pydocgui.pyw on Windows.
+
+- Issue #20748: Uninstalling pip does not leave behind the pyc of
+ the uninstaller anymore.
+
+- Issue #20568: The Windows installer now installs the unversioned ``pip``
+ command in addition to the versioned ``pip3`` and ``pip3.4`` commands.
+
+- Issue #20757: The ensurepip helper for the Windows uninstaller now skips
+ uninstalling pip (rather than failing) if the user has updated pip to a
+ different version from the one bundled with ensurepip.
+
+- Issue #20465: Update OS X and Windows installer builds to use
+ SQLite 3.8.3.1.
+
+
+What's New in Python 3.4.0 release candidate 2?
+===============================================
+
+Release date: 2014-02-23
+
+Core and Builtins
+-----------------
+
+- Issue #20625: Parameter names in __annotations__ were not mangled properly.
+ Discovered by Jonas Wielicki, patch by Yury Selivanov.
+
+- Issue #20261: In pickle, lookup __getnewargs__ and __getnewargs_ex__ on the
+ type of the object.
+
+- Issue #20619: Give the AST nodes of keyword-only arguments a column and line
+ number.
+
+- Issue #20526: Revert changes of issue #19466 which introduces a regression:
+ don't clear anymore the state of Python threads early during the Python
+ shutdown.
+
+Library
+-------
+
+- Issue #20710: The pydoc summary line no longer displays the "self" parameter
+ for bound methods.
+
+- Issue #20566: Change asyncio.as_completed() to use a Queue, to
+ avoid O(N**2) behavior.
+
+- Issue #20704: Implement new debug API in asyncio. Add new methods
+ BaseEventLoop.set_debug() and BaseEventLoop.get_debug().
+ Add support for setting 'asyncio.tasks._DEBUG' variable with
+ 'PYTHONASYNCIODEBUG' environment variable.
+
+- asyncio: Refactoring and fixes: BaseEventLoop.sock_connect() raises an
+ error if the address is not resolved; use __slots__ in Handle and
+ TimerHandle; as_completed() and wait() raise TypeError if the passed
+ list of Futures is a single Future; call_soon() and other 'call_*()'
+ functions raise TypeError if the passed callback is a coroutine
+ function; _ProactorBasePipeTransport uses _FlowControlMixin;
+ WriteTransport.set_write_buffer_size() calls _maybe_pause_protocol()
+ to consider pausing receiving if the watermark limits have changed;
+ fix _check_resolved_address() for IPv6 address; and other minor
+ improvements, along with multiple documentation updates.
+
+- Issue #20684: Fix inspect.getfullargspec() to not to follow __wrapped__
+ chains. Make its behaviour consistent with bound methods first argument.
+ Patch by Nick Coghlan and Yury Selivanov.
+
+- Issue #20681: Add new error handling API in asyncio. New APIs:
+ loop.set_exception_handler(), loop.default_exception_handler(), and
+ loop.call_exception_handler().
+
+- Issue #20673: Implement support for UNIX Domain Sockets in asyncio.
+ New APIs: loop.create_unix_connection(), loop.create_unix_server(),
+ streams.open_unix_connection(), and streams.start_unix_server().
+
+- Issue #20616: Add a format() method to tracemalloc.Traceback.
+
+- Issue #19744: the ensurepip installation step now just prints a warning to
+ stderr rather than failing outright if SSL/TLS is unavailable. This allows
+ local installation of POSIX builds without SSL/TLS support.
+
+- Issue #20594: Avoid name clash with the libc function posix_close.
+
+Build
+-----
+
+- Issue #20641: Run MSI custom actions (pip installation, pyc compilation)
+ with the NoImpersonate flag, to support elevated execution (UAC).
+
+- Issue #20221: Removed conflicting (or circular) hypot definition when
+ compiled with VS 2010 or above. Initial patch by Tabrez Mohammed.
+
+- Issue #20609: Restored the ability to build 64-bit Windows binaries on
+ 32-bit Windows, which was broken by the change in issue #19788.
+
+
+What's New in Python 3.4.0 release candidate 1?
+===============================================
+
+Release date: 2014-02-10
+
+Core and Builtins
+-----------------
+
+- Issue #19255: The builtins module is restored to initial value before
+ cleaning other modules. The sys and builtins modules are cleaned last.
+
+- Issue #20588: Make Python-ast.c C89 compliant.
+
+- Issue #20437: Fixed 22 potential bugs when deleting objects references.
+
+- Issue #20500: Displaying an exception at interpreter shutdown no longer
+ risks triggering an assertion failure in PyObject_Str.
+
+- Issue #20538: UTF-7 incremental decoder produced inconsistent string when
+ input was truncated in BASE64 section.
+
+- Issue #20404: io.TextIOWrapper (and hence the open() builtin) now uses the
+ internal codec marking system added for issue #19619 to throw LookupError
+ for known non-text encodings at stream construction time. The existing
+ output type checks remain in place to deal with unmarked third party
+ codecs.
+
+- Issue #17162: Add PyType_GetSlot.
+
+- Issue #20162: Fix an alignment issue in the siphash24() hash function which
+ caused a crash on PowerPC 64-bit (ppc64).
+
+Library
+-------
+
+- Issue #20530: The signatures for slot builtins have been updated
+ to reflect the fact that they only accept positional-only arguments.
+
+- Issue #20517: Functions in the os module that accept two filenames
+ now register both filenames in the exception on failure.
+
+- Issue #20563: The ipaddress module API is now considered stable.
+
+- Issue #14983: email.generator now always adds a line end after each MIME
+ boundary marker, instead of doing so only when there is an epilogue. This
+ fixes an RFC compliance bug and solves an issue with signed MIME parts.
+
+- Issue #20540: Fix a performance regression (vs. Python 3.2) when layering
+ a multiprocessing Connection over a TCP socket. For small payloads, Nagle's
+ algorithm would introduce idle delays before the entire transmission of a
+ message.
+
+- Issue #16983: the new email header parsing code will now decode encoded words
+ that are (incorrectly) surrounded by quotes, and register a defect.
+
+- Issue #19772: email.generator no longer mutates the message object when
+ doing a down-transform from 8bit to 7bit CTEs.
+
+- Issue #20536: the statistics module now correctly handle Decimal instances
+ with positive exponents
+
+- Issue #18805: the netmask/hostmask parsing in ipaddress now more reliably
+ filters out illegal values and correctly allows any valid prefix length.
+
+- Issue #20481: For at least Python 3.4, the statistics module will require
+ that all inputs for a single operation be of a single consistent type, or
+ else a mixed of ints and a single other consistent type. This avoids
+ some interoperability issues that arose with the previous approach of
+ coercing to a suitable common type.
+
+- Issue #20478: the statistics module now treats collections.Counter inputs
+ like any other iterable.
+
+- Issue #17369: get_filename was raising an exception if the filename
+ parameter's RFC2231 encoding was broken in certain ways. This was
+ a regression relative to python2.
+
+- Issue #20013: Some imap servers disconnect if the current mailbox is
+ deleted, and imaplib did not handle that case gracefully. Now it
+ handles the 'bye' correctly.
+
+- Issue #20531: Revert 3.4 version of fix for #19063, and apply the 3.3
+ version. That is, do *not* raise an error if unicode is passed to
+ email.message.Message.set_payload.
+
+- Issue #20476: If a non-compat32 policy is used with any of the email parsers,
+ EmailMessage is now used as the factory class. The factory class should
+ really come from the policy; that will get fixed in 3.5.
+
+- Issue #19920: TarFile.list() no longer fails when outputs a listing
+ containing non-encodable characters. Based on patch by Vajrasky Kok.
+
+- Issue #20515: Fix NULL pointer dereference introduced by issue #20368.
+
+- Issue #19186: Restore namespacing of expat symbols inside the pyexpat module.
+
+- Issue #20053: ensurepip (and hence venv) are no longer affected by the
+ settings in the default pip configuration file.
+
+- Issue #20426: When passing the re.DEBUG flag, re.compile() displays the
+ debug output every time it is called, regardless of the compilation cache.
+
+- Issue #20368: The null character now correctly passed from Tcl to Python.
+ Improved error handling in variables-related commands.
+
+- Issue #20435: Fix _pyio.StringIO.getvalue() to take into account newline
+ translation settings.
+
+- tracemalloc: Fix slicing traces and fix slicing a traceback.
+
+- Issue #20354: Fix an alignment issue in the tracemalloc module on 64-bit
+ platforms. Bug seen on 64-bit Linux when using "make profile-opt".
+
+- Issue #17159: inspect.signature now accepts duck types of functions,
+ which adds support for Cython functions. Initial patch by Stefan Behnel.
+
+- Issue #18801: Fix inspect.classify_class_attrs to correctly classify
+ object.__new__ and object.__init__.
+
+- Fixed cmath.isinf's name in its argument parsing code.
+
+- Issue #20311, #20452: poll and epoll now round the timeout away from zero,
+ instead of rounding towards zero, in select and selectors modules:
+ select.epoll.poll(), selectors.PollSelector.poll() and
+ selectors.EpollSelector.poll(). For example, a timeout of one microsecond
+ (1e-6) is now rounded to one millisecondi (1e-3), instead of being rounded to
+ zero. However, the granularity property and asyncio's resolution feature
+ were removed again.
+
+- asyncio: Some refactoring; various fixes; add write flow control to
+ unix pipes; Future.set_exception() instantiates the exception
+ argument if it is a class; improved proactor pipe transport; support
+ wait_for(f, None); don't log broken/disconnected pipes; use
+ ValueError instead of assert for forbidden subprocess_{shell,exec}
+ arguments; added a convenience API for subprocess management; added
+ StreamReader.at_eof(); properly handle duplicate coroutines/futures
+ in gather(), wait(), as_completed(); use a bytearray for buffering
+ in StreamReader; and more.
+
+- Issue #20288: fix handling of invalid numeric charrefs in HTMLParser.
+
+- Issue #20424: Python implementation of io.StringIO now supports lone surrogates.
+
+- Issue #20308: inspect.signature now works on classes without user-defined
+ __init__ or __new__ methods.
+
+- Issue #20372: inspect.getfile (and a bunch of other inspect functions that
+ use it) doesn't crash with unexpected AttributeError on classes defined in C
+ without __module__.
+
+- Issue #20356: inspect.signature formatting uses '/' to separate
+ positional-only parameters from others.
+
+- Issue #20223: inspect.signature now supports methods defined with
+ functools.partialmethods.
+
+- Issue #19456: ntpath.join() now joins relative paths correctly when a drive
+ is present.
+
+- Issue #19077: tempfile.TemporaryDirectory cleanup no longer fails when
+ called during shutdown. Emitting resource warning in __del__ no longer fails.
+ Original patch by Antoine Pitrou.
+
+- Issue #20394: Silence Coverity warning in audioop module.
+
+- Issue #20367: Fix behavior of concurrent.futures.as_completed() for
+ duplicate arguments. Patch by Glenn Langford.
+
+- Issue #8260: The read(), readline() and readlines() methods of
+ codecs.StreamReader returned incomplete data when were called after
+ readline() or read(size). Based on patch by Amaury Forgeot d'Arc.
+
+- Issue #20105: the codec exception chaining now correctly sets the
+ traceback of the original exception as its __traceback__ attribute.
+
+- Issue #17481: inspect.getfullargspec() now uses inspect.signature() API.
+
+- Issue #15304: concurrent.futures.wait() can block forever even if
+ Futures have completed. Patch by Glenn Langford.
+
+- Issue #14455: plistlib: fix serializing integers in the range
+ of an unsigned long long but outside of the range of signed long long for
+ binary plist files.
+
+IDLE
+----
+
+- Issue #20406: Use Python application icons for Idle window title bars.
+ Patch mostly by Serhiy Storchaka.
+
+- Update the python.gif icon for the Idle classbrowser and pathbowser
+ from the old green snake to the new blue and yellow snakes.
+
+- Issue #17721: Remove non-functional configuration dialog help button until we
+ make it actually gives some help when clicked. Patch by Guilherme Simões.
+
+Tests
+-----
+
+- Issue #20532: Tests which use _testcapi now are marked as CPython only.
+
+- Issue #19920: Added tests for TarFile.list(). Based on patch by Vajrasky Kok.
+
+- Issue #19990: Added tests for the imghdr module. Based on patch by
+ Claudiu Popa.
+
+- Issue #20474: Fix test_socket "unexpected success" failures on OS X 10.7+.
+
+Tools/Demos
+-----------
+
+- Issue #20530: Argument Clinic's signature format has been revised again.
+ The new syntax is highly human readable while still preventing false
+ positives. The syntax also extends Python syntax to denote "self" and
+ positional-only parameters, allowing inspect.Signature objects to be
+ totally accurate for all supported builtins in Python 3.4.
+
+- Issue #20456: Argument Clinic now observes the C preprocessor conditional
+ compilation statements of the C files it parses. When a Clinic block is
+ inside a conditional code, it adjusts its output to match, including
+ automatically generating an empty methoddef macro.
+
+- Issue #20456: Cloned functions in Argument Clinic now use the correct
+ name, not the name of the function they were cloned from, for text
+ strings inside generated code.
+
+- Issue #20456: Fixed Argument Clinic's test suite and "--converters" feature.
+
+- Issue #20456: Argument Clinic now allows specifying different names
+ for a parameter in Python and C, using "as" on the parameter line.
+
+- Issue #20326: Argument Clinic now uses a simple, unique signature to
+ annotate text signatures in docstrings, resulting in fewer false
+ positives. "self" parameters are also explicitly marked, allowing
+ inspect.Signature() to authoritatively detect (and skip) said parameters.
+
+- Issue #20326: Argument Clinic now generates separate checksums for the
+ input and output sections of the block, allowing external tools to verify
+ that the input has not changed (and thus the output is not out-of-date).
+
+Build
+-----
+
+- Issue #20465: Update SQLite shipped with OS X installer to 3.8.3.
+
+C-API
+-----
+
+- Issue #20517: Added new functions allowing OSError exceptions to reference
+ two filenames instead of one: PyErr_SetFromErrnoWithFilenameObjects() and
+ PyErr_SetExcFromWindowsErrWithFilenameObjects().
+
+Documentation
+-------------
+
+- Issue #20488: Change wording to say importlib is *the* implementation of
+ import instead of just *an* implementation.
+
+- Issue #6386: Clarify in the tutorial that specifying a symlink to execute
+ means the directory containing the executed script and not the symlink is
+ added to sys.path.
+
+
+What's New in Python 3.4.0 Beta 3?
+==================================
+
+Release date: 2014-01-26
+
+Core and Builtins
+-----------------
+
+- Issue #20189: Four additional builtin types (PyTypeObject,
+ PyMethodDescr_Type, _PyMethodWrapper_Type, and PyWrapperDescr_Type)
+ have been modified to provide introspection information for builtins.
+
+- Issue #17825: Cursor "^" is correctly positioned for SyntaxError and
+ IndentationError.
+
+- Issue #2382: SyntaxError cursor "^" is now written at correct position in most
+ cases when multibyte characters are in line (before "^"). This still not
+ works correctly with wide East Asian characters.
+
+- Issue #18960: The first line of Python script could be executed twice when
+ the source encoding was specified on the second line. Now the source encoding
+ declaration on the second line isn't effective if the first line contains
+ anything except a comment. 'python -x' works now again with files with the
+ source encoding declarations, and can be used to make Python batch files
+ on Windows.
+
+Library
+-------
+
+- asyncio: Various improvements and small changes not all covered by
+ issues listed below. E.g. wait_for() now cancels the inner task if
+ the timeout occcurs; tweaked the set of exported symbols; renamed
+ Empty/Full to QueueEmpty/QueueFull; "with (yield from lock)" now
+ uses a separate context manager; readexactly() raises if not enough
+ data was read; PTY support tweaks.
+
+- Issue #20311: asyncio: Add a granularity attribute to BaseEventLoop: maximum
+ between the resolution of the BaseEventLoop.time() method and the resolution
+ of the selector. The granuarility is used in the scheduler to round time and
+ deadline.
+
+- Issue #20311: selectors: Add a resolution attribute to BaseSelector.
+
+- Issue #20189: unittest.mock now no longer assumes that any object for
+ which it could get an inspect.Signature is a callable written in Python.
+ Fix courtesy of Michael Foord.
+
+- Issue #20317: ExitStack.__exit__ could create a self-referential loop if an
+ exception raised by a cleanup operation already had its context set
+ correctly (for example, by the @contextmanager decorator). The infinite
+ loop this caused is now avoided by checking if the expected context is
+ already set before trying to fix it.
+
+- Issue #20374: Fix build with GNU readline >= 6.3.
+
+- Issue #20262: Warnings are raised now when duplicate names are added in the
+ ZIP file or too long ZIP file comment is truncated.
+
+- Issue #20165: The unittest module no longer considers tests marked with
+ @expectedFailure successful if they pass.
+
+- Issue #18574: Added missing newline in 100-Continue reply from
+ http.server.BaseHTTPRequestHandler. Patch by Nikolaus Rath.
+
+- Issue #20270: urllib.urlparse now supports empty ports.
+
+- Issue #20243: TarFile no longer raise ReadError when opened in write mode.
+
+- Issue #20238: TarFile opened with external fileobj and "w:gz" mode didn't
+ write complete output on close.
+
+- Issue #20245: The open functions in the tarfile module now correctly handle
+ empty mode.
+
+- Issue #20242: Fixed basicConfig() format strings for the alternative
+ formatting styles. Thanks to kespindler for the bug report and patch.
+
+- Issue #20246: Fix buffer overflow in socket.recvfrom_into.
+
+- Issues #20206 and #5803: Fix edge case in email.quoprimime.encode where it
+ truncated lines ending in a character needing encoding but no newline by
+ using a more efficient algorithm that doesn't have the bug.
+
+- Issue #19082: Working xmlrpc.server and xmlrpc.client examples. Both in
+ modules and in documentation. Initial patch contributed by Vajrasky Kok.
+
+- Issue #20138: The wsgiref.application_uri() and wsgiref.request_uri()
+ functions now conform to PEP 3333 when handle non-ASCII URLs.
+
+- Issue #19097: Raise the correct Exception when cgi.FieldStorage is given an
+ invalid fileobj.
+
+- Issue #20152: Ported Python/import.c over to Argument Clinic.
+
+- Issue #13107: argparse and optparse no longer raises an exception when output
+ a help on environment with too small COLUMNS. Based on patch by
+ Elazar Gershuni.
+
+- Issue #20207: Always disable SSLv2 except when PROTOCOL_SSLv2 is explicitly
+ asked for.
+
+- Issue #18960: The tokenize module now ignore the source encoding declaration
+ on the second line if the first line contains anything except a comment.
+
+- Issue #20078: Reading malformed zipfiles no longer hangs with 100% CPU
+ consumption.
+
+- Issue #20113: os.readv() and os.writev() now raise an OSError exception on
+ error instead of returning -1.
+
+- Issue #19719: Make importlib.abc.MetaPathFinder.find_module(),
+ PathEntryFinder.find_loader(), and Loader.load_module() use PEP 451 APIs to
+ help with backwards-compatibility.
+
+- Issue #20144: inspect.Signature now supports parsing simple symbolic
+ constants as parameter default values in __text_signature__.
+
+- Issue #20072: Fixed multiple errors in tkinter with wantobjects is False.
+
+- Issue #20229: Avoid plistlib deprecation warning in platform.mac_ver().
+
+- Issue #14455: Fix some problems with the new binary plist support in plistlib.
+
+IDLE
+----
+
+- Issue #17390: Add Python version to Idle editor window title bar.
+ Original patches by Edmond Burnett and Kent Johnson.
+
+- Issue #18960: IDLE now ignores the source encoding declaration on the second
+ line if the first line contains anything except a comment.
+
+Tests
+-----
+
+- Issue #20358: Tests for curses.window.overlay and curses.window.overwrite
+ no longer specify min{row,col} > max{row,col}.
+
+- Issue #19804: The test_find_mac test in test_uuid is now skipped if the
+ ifconfig executable is not available.
+
+- Issue #19886: Use better estimated memory requirements for bigmem tests.
+
+Tools/Demos
+-----------
+
+- Issue #20390: Argument Clinic's "file" output preset now defaults to
+ "{dirname}/clinic/{basename}.h".
+
+- Issue #20390: Argument Clinic's "class" directive syntax has been extended
+ with two new required arguments: "typedef" and "type_object".
+
+- Issue #20390: Argument Clinic: If __new__ or __init__ functions didn't use
+ kwargs (or args), the PyArg_NoKeywords (or PyArg_NoPositional) calls
+ generated are only run when the type object is an exact match.
+
+- Issue #20390: Argument Clinic now fails if you have required parameters after
+ optional parameters.
+
+- Issue #20390: Argument Clinic converters now have a new template they can
+ inject code into: "modifiers". Code put there is run in the parsing
+ function after argument parsing but before the call to the impl.
+
+- Issue #20376: Argument Clinic now escapes backslashes in docstrings.
+
+- Issue #20381: Argument Clinic now sanity checks the default argument when
+ c_default is also specified, providing a nice failure message for
+ disallowed values.
+
+- Issue #20189: Argument Clinic now ensures that parser functions for
+ __new__ are always of type newfunc, the type of the tp_new slot.
+ Similarly, parser functions for __init__ are now always of type initproc,
+ the type of tp_init.
+
+- Issue #20189: Argument Clinic now suppresses the docstring for __new__
+ and __init__ functions if no docstring is provided in the input.
+
+- Issue #20189: Argument Clinic now suppresses the "self" parameter in the
+ impl for @staticmethod functions.
+
+- Issue #20294: Argument Clinic now supports argument parsing for __new__ and
+ __init__ functions.
+
+- Issue #20299: Argument Clinic custom converters may now change the default
+ value of c_default and py_default with a class member.
+
+- Issue #20287: Argument Clinic's output is now configurable, allowing
+ delaying its output or even redirecting it to a separate file.
+
+- Issue #20226: Argument Clinic now permits simple expressions
+ (e.g. "sys.maxsize - 1") as default values for parameters.
+
+- Issue #19936: Added executable bits or shebang lines to Python scripts which
+ requires them. Disable executable bits and shebang lines in test and
+ benchmark files in order to prevent using a random system python, and in
+ source files of modules which don't provide command line interface. Fixed
+ shebang lines in the unittestgui and checkpip scripts.
+
+- Issue #20268: Argument Clinic now supports cloning the parameters and
+ return converter of existing functions.
+
+- Issue #20228: Argument Clinic now has special support for class special
+ methods.
+
+- Issue #20214: Fixed a number of small issues and documentation errors in
+ Argument Clinic (see issue for details).
+
+- Issue #20196: Fixed a bug where Argument Clinic did not generate correct
+ parsing code for functions with positional-only parameters where all arguments
+ are optional.
+
+- Issue #18960: 2to3 and the findnocoding.py script now ignore the source
+ encoding declaration on the second line if the first line contains anything
+ except a comment.
+
+- Issue #19723: The marker comments Argument Clinic uses have been changed
+ to improve readability.
+
+- Issue #20157: When Argument Clinic renames a parameter because its name
+ collides with a C keyword, it no longer exposes that rename to PyArg_Parse.
+
+- Issue #20141: Improved Argument Clinic's support for the PyArg_Parse "O!"
+ format unit.
+
+- Issue #20144: Argument Clinic now supports simple symbolic constants
+ as parameter default values.
+
+- Issue #20143: The line numbers reported in Argument Clinic errors are
+ now more accurate.
+
+- Issue #20142: Py_buffer variables generated by Argument Clinic are now
+ initialized with a default value.
+
+Build
+-----
+
+- Issue #12837: Silence a tautological comparison warning on OS X under Clang in
+ socketmodule.c.
+
+
+What's New in Python 3.4.0 Beta 2?
+==================================
+
+Release date: 2014-01-05
+
+Core and Builtins
+-----------------
+
+- Issue #17432: Drop UCS2 from names of Unicode functions in python3.def.
+
+- Issue #19526: Exclude all new API from the stable ABI. Exceptions can be
+ made if a need is demonstrated.
+
+- Issue #19969: PyBytes_FromFormatV() now raises an OverflowError if "%c"
+ argument is not in range [0; 255].
+
+- Issue #19995: %c, %o, %x, and %X now issue a DeprecationWarning on non-integer
+ input; reworded docs to clarify that an integer type should define both __int__
+ and __index__.
+
+- Issue #19787: PyThread_set_key_value() now always set the value. In Python
+ 3.3, the function did nothing if the key already exists (if the current value
+ is a non-NULL pointer).
+
+- Issue #14432: Remove the thread state field from the frame structure. Fix a
+ crash when a generator is created in a C thread that is destroyed while the
+ generator is still used. The issue was that a generator contains a frame, and
+ the frame kept a reference to the Python state of the destroyed C thread. The
+ crash occurs when a trace function is setup.
+
+- Issue #19576: PyGILState_Ensure() now initializes threads. At startup, Python
+ has no concrete GIL. If PyGILState_Ensure() is called from a new thread for
+ the first time and PyEval_InitThreads() was not called yet, a GIL needs to be
+ created.
+
+- Issue #17576: Deprecation warning emitted now when __int__() or __index__()
+ return not int instance.
+
+- Issue #19932: Fix typo in import.h, missing whitespaces in function prototypes.
+
+- Issue #19736: Add module-level statvfs constants defined for GNU/glibc
+ based systems.
+
+- Issue #20097: Fix bad use of "self" in importlib's WindowsRegistryFinder.
+
+- Issue #19729: In str.format(), fix recursive expansion in format spec.
+
+- Issue #19638: Fix possible crash / undefined behaviour from huge (more than 2
+ billion characters) input strings in _Py_dg_strtod.
+
+Library
+-------
+
+- Issue #20154: Deadlock in asyncio.StreamReader.readexactly().
+
+- Issue #16113: Remove sha3 module again.
+
+- Issue #20111: pathlib.Path.with_suffix() now sanity checks the given suffix.
+
+- Fix breakage in TestSuite.countTestCases() introduced by issue #11798.
+
+- Issue #20108: Avoid parameter name clash in inspect.getcallargs().
+
+- Issue #19918: Fix PurePath.relative_to() under Windows.
+
+- Issue #19422: Explicitly disallow non-SOCK_STREAM sockets in the ssl
+ module, rather than silently let them emit clear text data.
+
+- Issue #20046: Locale alias table no longer contains entities which can be
+ calculated. Generalized support of the euro modifier.
+
+- Issue #20027: Fixed locale aliases for devanagari locales.
+
+- Issue #20067: Tkinter variables now work when wantobjects is false.
+
+- Issue #19020: Tkinter now uses splitlist() instead of split() in configure
+ methods.
+
+- Issue #19744: ensurepip now provides a better error message when Python is
+ built without SSL/TLS support (pip currently requires that support to run,
+ even if only operating with local wheel files)
+
+- Issue #19734: ensurepip now ignores all pip environment variables to avoid
+ odd behaviour based on user configuration settings
+
+- Fix TypeError on "setup.py upload --show-response".
+
+- Issue #20045: Fix "setup.py register --list-classifiers".
+
+- Issue #18879: When a method is looked up on a temporary file, avoid closing
+ the file before the method is possibly called.
+
+- Issue #20037: Avoid crashes when opening a text file late at interpreter
+ shutdown.
+
+- Issue #19967: Thanks to the PEP 442, asyncio.Future now uses a
+ destructor to log uncaught exceptions, instead of the dedicated
+ _TracebackLogger class.
+
+- Added a Task.current_task() class method to asyncio.
+
+- Issue #19850: Set SA_RESTART in asyncio when registering a signal
+ handler to limit EINTR occurrences.
+
+- Implemented write flow control in asyncio for proactor event loop (Windows).
+
+- Change write buffer in asyncio use to avoid O(N**2) behavior. Make
+ write()/sendto() accept bytearray/memoryview.
+
+- Issue #20034: Updated alias mapping to most recent locale.alias file
+ from X.org distribution using makelocalealias.py.
+
+- Issue #5815: Fixed support for locales with modifiers. Fixed support for
+ locale encodings with hyphens.
+
+- Issue #20026: Fix the sqlite module to handle correctly invalid isolation
+ level (wrong type).
+
+- Issue #18829: csv.Dialect() now checks type for delimiter, escapechar and
+ quotechar fields. Original patch by Vajrasky Kok.
+
+- Issue #19855: uuid.getnode() on Unix now looks on the PATH for the
+ executables used to find the mac address, with /sbin and /usr/sbin as
+ fallbacks.
+
+- Issue #20007: HTTPResponse.read(0) no more prematurely closes connection.
+ Original patch by Simon Sapin.
+
+- Issue #19946: multiprocessing now uses runpy to initialize __main__ in
+ child processes when necessary, allowing it to correctly handle scripts
+ without suffixes and submodules that use explicit relative imports or
+ otherwise rely on parent modules being correctly imported prior to
+ execution.
+
+- Issue #19921: When Path.mkdir() is called with parents=True, any missing
+ parent is created with the default permissions, ignoring the mode argument
+ (mimicking the POSIX "mkdir -p" command).
+
+- Issue #19887: Improve the Path.resolve() algorithm to support certain
+ symlink chains.
+
+- Issue #19912: Fixed numerous bugs in ntpath.splitunc().
+
+- Issue #19911: ntpath.splitdrive() now correctly processes the 'İ' character
+ (U+0130, LATIN CAPITAL LETTER I WITH DOT ABOVE).
+
+- Issue #19532: python -m compileall with no filename/directory arguments now
+ respects the -f and -q flags instead of ignoring them.
+
+- Issue #19623: Fixed writing to unseekable files in the aifc module.
+
+- Issue #19946: multiprocessing.spawn now raises ImportError when the module to
+ be used as the main module cannot be imported.
+
+- Issue #17919: select.poll.register() again works with poll.POLLNVAL on AIX.
+ Fixed integer overflow in the eventmask parameter.
+
+- Issue #19063: if a Charset's body_encoding was set to None, the email
+ package would generate a message claiming the Content-Transfer-Encoding
+ was 7bit, and produce garbage output for the content. This now works.
+ A couple of other set_payload mishandlings of non-ASCII are also fixed.
+ In addition, calling set_payload with a string argument without
+ specifying a charset now raises an error (this is a new error in 3.4).
+
+- Issue #15475: Add __sizeof__ implementations for itertools objects.
+
+- Issue #19944: Fix importlib.find_spec() so it imports parents as needed
+ and move the function to importlib.util.
+
+- Issue #19880: Fix a reference leak in unittest.TestCase. Explicitly break
+ reference cycles between frames and the _Outcome instance.
+
+- Issue #17429: platform.linux_distribution() now decodes files from the UTF-8
+ encoding with the surrogateescape error handler, instead of decoding from the
+ locale encoding in strict mode. It fixes the function on Fedora 19 which is
+ probably the first major distribution release with a non-ASCII name. Patch
+ written by Toshio Kuratomi.
+
+- Issue #19343: Expose FreeBSD-specific APIs in resource module. Original
+ patch by Koobs.
+
+- Issue #19929: Call os.read with 32768 within subprocess.Popen.communicate
+ rather than 4096 for efficiency. A microbenchmark shows Linux and OS X
+ both using ~50% less cpu time this way.
+
+- Issue #19506: Use a memoryview to avoid a data copy when piping data
+ to stdin within subprocess.Popen.communicate. 5-10% less cpu usage.
+
+- Issue #19876: selectors unregister() no longer raises ValueError or OSError
+ if the FD is closed (as long as it was registered).
+
+- Issue #19908: pathlib now joins relative Windows paths correctly when a drive
+ is present. Original patch by Antoine Pitrou.
+
+- Issue #19296: Silence compiler warning in dbm_open
+
+- Issue #6784: Strings from Python 2 can now be unpickled as bytes
+ objects by setting the encoding argument of Unpickler to be 'bytes'.
+ Initial patch by Merlijn van Deen.
+
+- Issue #19839: Fix regression in bz2 module's handling of non-bzip2 data at
+ EOF, and analogous bug in lzma module.
+
+- Issue #19881: Fix pickling bug where cpickle would emit bad pickle data for
+ large bytes string (i.e., with size greater than 2**32-1).
+
+- Issue #19138: doctest's IGNORE_EXCEPTION_DETAIL now allows a match when
+ no exception detail exists (no colon following the exception's name, or
+ a colon does follow but no text follows the colon).
+
+- Issue #19927: Add __eq__ to path-based loaders in importlib.
+
+- Issue #19827: On UNIX, setblocking() and settimeout() methods of
+ socket.socket can now avoid a second syscall if the ioctl() function can be
+ used, or if the non-blocking flag of the socket is unchanged.
+
+- Issue #19785: smtplib now supports SSLContext.check_hostname and server name
+ indication for TLS/SSL connections.
+
+- Issue #19784: poplib now supports SSLContext.check_hostname and server name
+ indication for TLS/SSL connections.
+
+- Issue #19783: nntplib now supports SSLContext.check_hostname and server name
+ indication for TLS/SSL connections.
+
+- Issue #19782: imaplib now supports SSLContext.check_hostname and server name
+ indication for TLS/SSL connections.
+
+- Issue #20123: Fix pydoc.synopsis() for "binary" modules.
+
+- Issue #19834: Support unpickling of exceptions pickled by Python 2.
+
+- Issue #19781: ftplib now supports SSLContext.check_hostname and server name
+ indication for TLS/SSL connections.
+
+- Issue #19509: Add SSLContext.check_hostname to match the peer's certificate
+ with server_hostname on handshake.
+
+- Issue #15798: Fixed subprocess.Popen() to no longer fail if file
+ descriptor 0, 1 or 2 is closed.
+
+- Issue #17897: Optimized unpickle prefetching.
+
+- Issue #3693: Make the error message more helpful when the array.array()
+ constructor is given a str. Move the array module typecode documentation to
+ the docstring of the constructor.
+
+- Issue #19088: Fixed incorrect caching of the copyreg module in
+ object.__reduce__() and object.__reduce_ex__().
+
+- Issue #19698: Removed exec_module() methods from
+ importlib.machinery.BuiltinImporter and ExtensionFileLoader.
+
+- Issue #18864: Added a setter for ModuleSpec.has_location.
+
+- Fixed _pickle.Unpickler to not fail when loading empty strings as
+ persistent IDs.
+
+- Issue #11480: Fixed copy.copy to work with classes with custom metaclasses.
+ Patch by Daniel Urban.
+
+- Issue #6477: Added support for pickling the types of built-in singletons
+ (i.e., Ellipsis, NotImplemented, None).
+
+- Issue #19713: Add remaining PEP 451-related deprecations and move away
+ from using find_module/find_loaer/load_module.
+
+- Issue #19708: Update pkgutil to use the new importer APIs.
+
+- Issue #19703: Update pydoc to use the new importer APIs.
+
+- Issue #19851: Fixed a regression in reloading sub-modules.
+
+- ssl.create_default_context() sets OP_NO_COMPRESSION to prevent CRIME.
+
+- Issue #19802: Add socket.SO_PRIORITY.
+
+- Issue #11508: Fixed uuid.getnode() and uuid.uuid1() on environment with
+ virtual interface. Original patch by Kent Frazier.
+
+- Issue #11489: JSON decoder now accepts lone surrogates.
+
+- Issue #19545: Avoid chained exceptions while passing stray % to
+ time.strptime(). Initial patch by Claudiu Popa.
+
+IDLE
+----
+
+- Issue #20058: sys.stdin.readline() in IDLE now always returns only one line.
+
+- Issue #19481: print() of string subclass instance in IDLE no longer hangs.
+
+- Issue #18270: Prevent possible IDLE AttributeError on OS X when no initial
+ shell window is present.
+
+Tests
+-----
+
+- Issue #20055: Fix test_shutil under Windows with symlink privileges held.
+ Patch by Vajrasky Kok.
+
+- Issue #20070: Don't run test_urllib2net when network resources are not
+ enabled.
+
+- Issue #19938: Re-enabled test_bug_1333982 in test_dis, which had been
+ disabled since 3.0 due to the changes in listcomp handling.
+
+- Issue #19320: test_tcl no longer fails when wantobjects is false.
+
+- Issue #19919: Fix flaky SSL test. connect_ex() sometimes returns
+ EWOULDBLOCK on Windows or VMs hosted on Windows.
+
+- Issue #19912: Added tests for ntpath.splitunc().
+
+- Issue #19828: Fixed test_site when the whole suite is run with -S.
+
+- Issue #19928: Implemented a test for repr() of cell objects.
+
+- Issue #19535: Fixed test_docxmlrpc, test_functools, test_inspect, and
+ test_statistics when python is run with -OO.
+
+- Issue #19926: Removed unneeded test_main from test_abstract_numbers.
+ Patch by Vajrasky Kok.
+
+- Issue #19572: More skipped tests explicitly marked as skipped.
+
+- Issue #19595, #19987: Re-enabled a long-disabled test in test_winsound.
+
+- Issue #19588: Fixed tests in test_random that were silently skipped most
+ of the time. Patch by Julian Gindi.
+
+Build
+-----
+
+- Issue #19728: Enable pip installation by default on Windows.
+
+- Issue #16136: Remove VMS support
+
+- Issue #18215: Add script Tools/ssl/test_multiple_versions.py to compile and
+ run Python's unit tests with multiple versions of OpenSSL.
+
+- Issue #19922: define _INCLUDE__STDC_A1_SOURCE in HP-UX to include mbstate_t
+ for mbrtowc().
+
+- Issue #19788: kill_python(_d).exe is now run as a PreBuildEvent on the
+ pythoncore sub-project. This should prevent build errors due a previous
+ build's python(_d).exe still running.
+
+Documentation
+-------------
+
+- Issue #20265: Updated some parts of the Using Windows document.
+
+- Issue #20266: Updated some parts of the Windows FAQ.
+
+- Issue #20255: Updated the about and bugs pages.
+
+- Issue #20253: Fixed a typo in the ipaddress docs that advertised an
+ illegal attribute name. Found by INADA Naoki.
+
+- Issue #18840: Introduce the json module in the tutorial, and de-emphasize
+ the pickle module.
+
+- Issue #19845: Updated the Compiling Python on Windows section.
+
+- Issue #19795: Improved markup of True/False constants.
+
+Tools/Demos
+-----------
+
+- Issue #19659: Added documentation for Argument Clinic.
+
+- Issue #19976: Argument Clinic METH_NOARGS functions now always
+ take two parameters.
+
+
+What's New in Python 3.4.0 Beta 1?
+==================================
+
+Release date: 2013-11-24
+
+Core and Builtins
+-----------------
+
+- Use the repr of a module name in more places in import, especially
+ exceptions.
+
+- Issue #19619: str.encode, bytes.decode and bytearray.decode now use an
+ internal API to throw LookupError for known non-text encodings, rather
+ than attempting the encoding or decoding operation and then throwing a
+ TypeError for an unexpected output type. (The latter mechanism remains
+ in place for third party non-text encodings)
+
+- Issue #19183: Implement PEP 456 'secure and interchangeable hash algorithm'.
+ Python now uses SipHash24 on all major platforms.
+
+- Issue #12892: The utf-16* and utf-32* encoders no longer allow surrogate code
+ points (U+D800-U+DFFF) to be encoded. The utf-32* decoders no longer decode
+ byte sequences that correspond to surrogate code points. The surrogatepass
+ error handler now works with the utf-16* and utf-32* codecs. Based on
+ patches by Victor Stinner and Kang-Hao (Kenny) Lu.
+
+- Issue #17806: Added keyword-argument support for "tabsize" to
+ str/bytes.expandtabs().
+
+- Issue #17828: Output type errors in str.encode(), bytes.decode() and
+ bytearray.decode() now direct users to codecs.encode() or codecs.decode()
+ as appropriate.
+
+- Issue #17828: The interpreter now attempts to chain errors that occur in
+ codec processing with a replacement exception of the same type that
+ includes the codec name in the error message. It ensures it only does this
+ when the creation of the replacement exception won't lose any information.
+
+- Issue #19466: Clear the frames of daemon threads earlier during the
+ Python shutdown to call objects destructors. So "unclosed file" resource
+ warnings are now corretly emitted for daemon threads.
+
+- Issue #19514: Deduplicate some _Py_IDENTIFIER declarations.
+ Patch by Andrei Dorian Duma.
+
+- Issue #17936: Fix O(n**2) behaviour when adding or removing many subclasses
+ of a given type.
+
+- Issue #19428: zipimport now handles errors when reading truncated or invalid
+ ZIP archive.
+
+- Issue #18408: Add a new PyFrame_FastToLocalsWithError() function to handle
+ exceptions when merging fast locals into f_locals of a frame.
+ PyEval_GetLocals() now raises an exception and return NULL on failure.
+
+- Issue #19369: Optimized the usage of __length_hint__().
+
+- Issue #18603: Ensure that PyOS_mystricmp and PyOS_mystrnicmp are in the
+ Python executable and not removed by the linker's optimizer.
+
+- Issue #19306: Add extra hints to the faulthandler module's stack
+ dumps that these are "upside down".
+
+Library
+-------
+
+- Issue #3158: doctest can now find doctests in functions and methods
+ written in C.
+
+- Issue #13477: Added command line interface to the tarfile module.
+ Original patch by Berker Peksag.
+
+- Issue #19674: inspect.signature() now produces a correct signature
+ for some builtins.
+
+- Issue #19722: Added opcode.stack_effect(), which
+ computes the stack effect of bytecode instructions.
+
+- Issue #19735: Implement private function ssl._create_stdlib_context() to
+ create SSLContext objects in Python's stdlib module. It provides a single
+ configuration point and makes use of SSLContext.load_default_certs().
+
+- Issue #16203: Add re.fullmatch() function and regex.fullmatch() method,
+ which anchor the pattern at both ends of the string to match.
+ Original patch by Matthew Barnett.
+
+- Issue #13592: Improved the repr for regular expression pattern objects.
+ Based on patch by Hugo Lopes Tavares.
+
+- Issue #19641: Added the audioop.byteswap() function to convert big-endian
+ samples to little-endian and vice versa.
+
+- Issue #15204: Deprecated the 'U' mode in file-like objects.
+
+- Issue #17810: Implement PEP 3154, pickle protocol 4.
+
+- Issue #19668: Added support for the cp1125 encoding.
+
+- Issue #19689: Add ssl.create_default_context() factory function. It creates
+ a new SSLContext object with secure default settings.
+
+- Issue #19727: os.utime(..., None) is now potentially more precise
+ under Windows.
+
+- Issue #17201: ZIP64 extensions now are enabled by default. Patch by
+ William Mallard.
+
+- Issue #19292: Add SSLContext.load_default_certs() to load default root CA
+ certificates from default stores or system stores. By default the method
+ loads CA certs for authentication of server certs.
+
+- Issue #19673: Add pathlib to the stdlib as a provisional module (PEP 428).
+
+- Issue #16596: pdb in a generator now properly skips over yield and
+ yield from rather than stepping out of the generator into its
+ caller. (This is essential for stepping through asyncio coroutines.)
+
+- Issue #17916: Added dis.Bytecode.from_traceback() and
+ dis.Bytecode.current_offset to easily display "current instruction"
+ markers in the new disassembly API (Patch by Claudiu Popa).
+
+- Issue #19552: venv now supports bootstrapping pip into virtual environments
+
+- Issue #17134: Finalize interface to Windows' certificate store. Cert and
+ CRL enumeration are now two functions. enum_certificates() also returns
+ purpose flags as set of OIDs.
+
+- Issue #19555: Restore sysconfig.get_config_var('SO'), (and the distutils
+ equivalent) with a DeprecationWarning pointing people at $EXT_SUFFIX.
+
+- Issue #8813: Add SSLContext.verify_flags to change the verification flags
+ of the context in order to enable certification revocation list (CRL)
+ checks or strict X509 rules.
+
+- Issue #18294: Fix the zlib module to make it 64-bit safe.
+
+- Issue #19682: Fix compatibility issue with old version of OpenSSL that
+ was introduced by Issue #18379.
+
+- Issue #14455: plistlib now supports binary plists and has an updated API.
+
+- Issue #19633: Fixed writing not compressed 16- and 32-bit wave files on
+ big-endian platforms.
+
+- Issue #18379: SSLSocket.getpeercert() returns CA issuer AIA fields, OCSP
+ and CRL distribution points.
+
+- Issue #18138: Implement cadata argument of SSLContext.load_verify_location()
+ to load CA certificates and CRL from memory. It supports PEM and DER
+ encoded strings.
+
+- Issue #18775: Add name and block_size attribute to HMAC object. They now
+ provide the same API elements as non-keyed cryptographic hash functions.
+
+- Issue #17276: MD5 as default digestmod for HMAC is deprecated. The HMAC
+ module supports digestmod names, e.g. hmac.HMAC('sha1').
+
+- Issue #19449: in csv's writerow, handle non-string keys when generating the
+ error message that certain keys are not in the 'fieldnames' list.
+
+- Issue #13633: Added a new convert_charrefs keyword arg to HTMLParser that,
+ when True, automatically converts all character references.
+
+- Issue #2927: Added the unescape() function to the html module.
+
+- Issue #8402: Added the escape() function to the glob module.
+
+- Issue #17618: Add Base85 and Ascii85 encoding/decoding to the base64 module.
+
+- Issue #19634: time.strftime("%y") now raises a ValueError on AIX when given a
+ year before 1900.
+
+- Fix test.support.bind_port() to not cause an error when Python was compiled
+ on a system with SO_REUSEPORT defined in the headers but run on a system
+ with an OS kernel that does not support that reasonably new socket option.
+
+- Fix compilation error under gcc of the ctypes module bundled libffi for arm.
+
+- Issue #19448: Add private API to SSL module to lookup ASN.1 objects by OID,
+ NID, short name and long name.
+
+- Issue #19282: dbm.open now supports the context management protocol. (Inital
+ patch by Claudiu Popa)
+
+- Issue #8311: Added support for writing any bytes-like objects in the aifc,
+ sunau, and wave modules.
+
+- Issue #5202: Added support for unseekable files in the wave module.
+
+- Issue #19544 and Issue #1180: Restore global option to ignore
+ ~/.pydistutils.cfg in Distutils, accidentally removed in backout of
+ distutils2 changes.
+
+- Issue #19523: Closed FileHandler leak which occurred when delay was set.
+
+- Issue #19544 and Issue #6516: Restore support for --user and --group
+ parameters to sdist command accidentally rolled back as part of the
+ distutils2 rollback.
+
+- Issue #13674: Prevented time.strftime from crashing on Windows when given
+ a year before 1900 and a format of %y.
+
+- Issue #19406: implementation of the ensurepip module (part of PEP 453).
+ Patch by Donald Stufft and Nick Coghlan.
+
+- Issue #19544 and Issue #6286: Restore use of urllib over http allowing use
+ of http_proxy for Distutils upload command, a feature accidentally lost
+ in the rollback of distutils2.
+
+- Issue #19544 and Issue #7457: Restore the read_pkg_file method to
+ distutils.dist.DistributionMetadata accidentally removed in the undo of
+ distutils2.
+
+- Issue #16685: Added support for any bytes-like objects in the audioop module.
+ Removed support for strings.
+
+- Issue #7171: Add Windows implementation of ``inet_ntop`` and ``inet_pton``
+ to socket module. Patch by Atsuo Ishimoto.
+
+- Issue #19261: Added support for writing 24-bit samples in the sunau module.
+
+- Issue #1097797: Added CP273 encoding, used on IBM mainframes in
+ Germany and Austria. Mapping provided by Michael Bierenfeld.
+
+- Issue #1575020: Fixed support of 24-bit wave files on big-endian platforms.
+
+- Issue #19378: Fixed a number of cases in the dis module where the new
+ "file" parameter was not being honoured correctly
+
+- Issue #19378: Removed the "dis.Bytecode.show_info" method
+
+- Issue #19378: Renamed the "dis.Bytecode.display_code" method to
+ "dis.Bytecode.dis" and converted it to returning a string rather than
+ printing output.
+
+- Issue #19378: the "line_offset" parameter in the new "dis.get_instructions"
+ API has been renamed to "first_line" (and the default value and usage
+ changed accordingly). This should reduce confusion with the more common use
+ of "offset" in the dis docs to refer to bytecode offsets.
+
+- Issue #18678: Corrected spwd struct member names in spwd module:
+ sp_nam->sp_namp, and sp_pwd->sp_pwdp. The old names are kept as extra
+ structseq members, for backward compatibility.
+
+- Issue #6157: Fixed tkinter.Text.debug(). tkinter.Text.bbox() now raises
+ TypeError instead of TclError on wrong number of arguments. Original patch
+ by Guilherme Polo.
+
+- Issue #10197: Rework subprocess.get[status]output to use subprocess
+ functionality and thus to work on Windows. Patch by Nick Coghlan
+
+- Issue #6160: The bbox() method of tkinter.Spinbox now returns a tuple of
+ integers instead of a string. Based on patch by Guilherme Polo.
+
+- Issue #19403: contextlib.redirect_stdout is now reentrant
+
+- Issue #19286: Directories in ``package_data`` are no longer added to
+ the filelist, preventing failure outlined in the ticket.
+
+- Issue #19480: HTMLParser now accepts all valid start-tag names as defined
+ by the HTML5 standard.
+
+- Issue #15114: The html.parser module now raises a DeprecationWarning when the
+ strict argument of HTMLParser or the HTMLParser.error method are used.
+
+- Issue #19410: Undo the special-casing removal of '' for
+ importlib.machinery.FileFinder.
+
+- Issue #19424: Fix the warnings module to accept filename containing surrogate
+ characters.
+
+- Issue #19435: Fix directory traversal attack on CGIHttpRequestHandler.
+
+- Issue #19227: Remove pthread_atfork() handler. The handler was added to
+ solve #18747 but has caused issues.
+
+- Issue #19420: Fix reference leak in module initalization code of
+ _hashopenssl.c
+
+- Issue #19329: Optimized compiling charsets in regular expressions.
+
+- Issue #19227: Try to fix deadlocks caused by re-seeding then OpenSSL
+ pseudo-random number generator on fork().
+
+- Issue #16037: HTTPMessage.readheaders() raises an HTTPException when more than
+ 100 headers are read. Adapted from patch by Jyrki Pulliainen.
+
+- Issue #16040: CVE-2013-1752: nntplib: Limit maximum line lengths to 2048 to
+ prevent readline() calls from consuming too much memory. Patch by Jyrki
+ Pulliainen.
+
+- Issue #16041: CVE-2013-1752: poplib: Limit maximum line lengths to 2048 to
+ prevent readline() calls from consuming too much memory. Patch by Jyrki
+ Pulliainen.
+
+- Issue #17997: Change behavior of ``ssl.match_hostname()`` to follow RFC 6125,
+ for security reasons. It now doesn't match multiple wildcards nor wildcards
+ inside IDN fragments.
+
+- Issue #16039: CVE-2013-1752: Change use of readline in imaplib module to limit
+ line length. Patch by Emil Lind.
+
+- Issue #19330: the unnecessary wrapper functions have been removed from the
+ implementations of the new contextlib.redirect_stdout and
+ contextlib.suppress context managers, which also ensures they provide
+ reasonable help() output on instances
+
+- Issue #19393: Fix symtable.symtable function to not be confused when there are
+ functions or classes named "top".
+
+- Issue #18685: Restore re performance to pre-PEP 393 levels.
+
+- Issue #19339: telnetlib module is now using time.monotonic() when available
+ to compute timeout.
+
+- Issue #19399: fix sporadic test_subprocess failure.
+
+- Issue #13234: Fix os.listdir to work with extended paths on Windows.
+ Patch by Santoso Wijaya.
+
+- Issue #19375: The site module adding a "site-python" directory to sys.path,
+ if it exists, is now deprecated.
+
+- Issue #19379: Lazily import linecache in the warnings module, to make
+ startup with warnings faster until a warning gets printed.
+
+- Issue #19288: Fixed the "in" operator of dbm.gnu databases for string
+ argument. Original patch by Arfrever Frehtes Taifersar Arahesis.
+
+- Issue #19287: Fixed the "in" operator of dbm.ndbm databases for string
+ argument. Original patch by Arfrever Frehtes Taifersar Arahesis.
+
+- Issue #19327: Fixed the working of regular expressions with too big charset.
+
+- Issue #17400: New 'is_global' attribute for ipaddress to tell if an address
+ is allocated by IANA for global or private networks.
+
+- Issue #19350: Increasing the test coverage of macurl2path. Patch by Colin
+ Williams.
+
+- Issue #19365: Optimized the parsing of long replacement string in re.sub*()
+ functions.
+
+- Issue #19352: Fix unittest discovery when a module can be reached
+ through several paths (e.g. under Debian/Ubuntu with virtualenv).
+
+- Issue #15207: Fix mimetypes to read from correct part of Windows registry
+ Original patch by Dave Chambers
+
+- Issue #16595: Add prlimit() to resource module.
+
+- Issue #19324: Expose Linux-specific constants in resource module.
+
+- Load SSL's error strings in hashlib.
+
+- Issue #18527: Upgrade internal copy of zlib to 1.2.8.
+
+- Issue #19274: Add a filterfunc parameter to PyZipFile.writepy.
+
+- Issue #8964: fix platform._sys_version to handle IronPython 2.6+.
+ Patch by Martin Matusiak.
+
+- Issue #19413: Restore pre-3.3 reload() semantics of re-finding modules.
+
+- Issue #18958: Improve error message for json.load(s) while passing a string
+ that starts with a UTF-8 BOM.
+
+- Issue #19307: Improve error message for json.load(s) while passing objects
+ of the wrong type.
+
+- Issue #16038: CVE-2013-1752: ftplib: Limit amount of data read by
+ limiting the call to readline(). Original patch by Michał
+ Jastrzębski and Giampaolo Rodola.
+
+- Issue #17087: Improved the repr for regular expression match objects.
+
+Tests
+-----
+
+- Issue #19664: test_userdict's repr test no longer depends on the order
+ of dict elements.
+
+- Issue #19440: Clean up test_capi by removing an unnecessary __future__
+ import, converting from test_main to unittest.main, and running the
+ _testcapi module tests as subTests of a unittest TestCase method.
+
+- Issue #19378: the main dis module tests are now run with both stdout
+ redirection *and* passing an explicit file parameter
+
+- Issue #19378: removed the not-actually-helpful assertInstructionMatches
+ and assertBytecodeExactlyMatches helpers from bytecode_helper
+
+- Issue #18702: All skipped tests now reported as skipped.
+
+- Issue #19439: interpreter embedding tests are now executed on Windows
+ (Patch by Zachary Ware)
+
+- Issue #19085: Added basic tests for all tkinter widget options.
+
+- Issue #19384: Fix test_py_compile for root user, patch by Claudiu Popa.
+
+Documentation
+-------------
+
+- Issue #18326: Clarify that list.sort's arguments are keyword-only. Also,
+ attempt to reduce confusion in the glossary by not saying there are
+ different "types" of arguments and parameters.
+
+Build
+-----
+
+- Issue #19358: "make clinic" now runs the Argument Clinic preprocessor
+ over all CPython source files.
+
+- Update SQLite to 3.8.1, xz to 5.0.5, and Tcl/Tk to 8.6.1 on Windows.
+
+- Issue #16632: Enable DEP and ASLR on Windows.
+
+- Issue #17791: Drop PREFIX and EXEC_PREFIX definitions from PC/pyconfig.h
+
+- Add workaround for VS 2010 nmake clean issue. VS 2010 doesn't set up PATH
+ for nmake.exe correctly.
+
+- Issue #19550: Implement Windows installer changes of PEP 453 (ensurepip).
+
+- Issue #19520: Fix compiler warning in the _sha3 module on 32bit Windows.
+
+- Issue #19356: Avoid using a C variabled named "_self", it's a reserved
+ word in some C compilers.
+
+- Issue #15792: Correct build options on Win64. Patch by Jeremy Kloth.
+
+- Issue #19373: Apply upstream change to Tk 8.5.15 fixing OS X 10.9
+ screen refresh problem for OS X installer build.
+
+- Issue #19649: On OS X, the same set of file names are now installed
+ in bin directories for all configurations: non-framework vs framework,
+ and single arch vs universal builds. pythonx.y-32 is now always
+ installed for 64-bit/32-bit universal builds. The obsolete and
+ undocumented pythonw* symlinks are no longer installed anywhere.
+
+- Issue #19553: PEP 453 - "make install" and "make altinstall" now install or
+ upgrade pip by default, using the bundled pip provided by the new ensurepip
+ module. A new configure option, --with-ensurepip[=upgrade|install|no], is
+ available to override the default ensurepip "--upgrade" option. The option
+ can also be set with "make [alt]install ENSUREPIP=[upgrade|install|no]".
+
+- Issue #19551: PEP 453 - the OS X installer now installs pip by default.
+
+- Update third-party libraries for OS X installers: xz 5.0.3 -> 5.0.5,
+ SQLite 3.7.13 -> 3.8.1
+
+- Issue #15663: Revert OS X installer built-in Tcl/Tk support for 3.4.0b1.
+ Some third-party projects, such as Matplotlib and PIL/Pillow,
+ depended on being able to build with Tcl and Tk frameworks in
+ /Library/Frameworks.
+
+Tools/Demos
+-----------
+
+- Issue #19730: Argument Clinic now supports all the existing PyArg
+ "format units" as legacy converters, as well as two new features:
+ "self converters" and the "version" directive.
+
+- Issue #19552: pyvenv now bootstraps pip into virtual environments by
+ default (pass --without-pip to request the old behaviour)
+
+- Issue #19390: Argument Clinic no longer accepts malformed Python
+ and C ids.
+
+
+What's New in Python 3.4.0 Alpha 4?
+===================================
+
+Release date: 2013-10-20
+
+Core and Builtins
+-----------------
+
+- Issue #19301: Give classes and functions that are explicitly marked global a
+ global qualname.
+
+- Issue #19279: UTF-7 decoder no longer produces illegal strings.
+
+- Issue #16612: Add "Argument Clinic", a compile-time preprocessor for
+ C files to generate argument parsing code. (See PEP 436.)
+
+- Issue #18810: Shift stat calls in importlib.machinery.FileFinder such that
+ the code is optimistic that if something exists in a directory named exactly
+ like the possible package being searched for that it's in actuality a
+ directory.
+
+- Issue #18416: importlib.machinery.PathFinder now treats '' as the cwd and
+ importlib.machinery.FileFinder no longer special-cases '' to '.'. This leads
+ to modules imported from cwd to now possess an absolute file path for
+ __file__ (this does not affect modules specified by path on the CLI but it
+ does affect -m/runpy). It also allows FileFinder to be more consistent by not
+ having an edge case.
+
+- Issue #4555: All exported C symbols are now prefixed with either
+ "Py" or "_Py".
+
+- Issue #19219: Speed up marshal.loads(), and make pyc files slightly
+ (5% to 10%) smaller.
+
+- Issue #19221: Upgrade Unicode database to version 6.3.0.
+
+- Issue #16742: The result of the C callback PyOS_ReadlineFunctionPointer must
+ now be a string allocated by PyMem_RawMalloc() or PyMem_RawRealloc() (or NULL
+ if an error occurred), instead of a string allocated by PyMem_Malloc() or
+ PyMem_Realloc().
+
+- Issue #19199: Remove ``PyThreadState.tick_counter`` field
+
+- Fix macro expansion of _PyErr_OCCURRED(), and make sure to use it in at
+ least one place so as to avoid regressions.
+
+- Issue #19087: Improve bytearray allocation in order to allow cheap popping
+ of data at the front (slice deletion).
+
+- Issue #19014: memoryview.cast() is now allowed on zero-length views.
+
+- Issue #18690: memoryview is now automatically registered with
+ collections.abc.Sequence
+
+- Issue #19078: memoryview now correctly supports the reversed builtin
+ (Patch by Claudiu Popa)
+
+Library
+-------
+
+- Issue #17457: unittest test discovery now works with namespace packages.
+ Patch by Claudiu Popa.
+
+- Issue #18235: Fix the sysconfig variables LDSHARED and BLDSHARED under AIX.
+ Patch by David Edelsohn.
+
+- Issue #18606: Add the new "statistics" module (PEP 450). Contributed
+ by Steven D'Aprano.
+
+- Issue #12866: The audioop module now supports 24-bit samples.
+
+- Issue #19254: Provide an optimized Python implementation of pbkdf2_hmac.
+
+- Issues #19201, Issue #19222, Issue #19223: Add "x" mode (exclusive creation)
+ in opening file to bz2, gzip and lzma modules. Patches by Tim Heaney and
+ Vajrasky Kok.
+
+- Fix a reference count leak in _sre.
+
+- Issue #19262: Initial check in of the 'asyncio' package (a.k.a. Tulip,
+ a.k.a. PEP 3156). There are no docs yet, and the PEP is slightly
+ out of date with the code. This module will have *provisional* status
+ in Python 3.4.
+
+- Issue #19276: Fixed the wave module on 64-bit big-endian platforms.
+
+- Issue #19266: Rename the new-in-3.4 ``contextlib.ignore`` context manager
+ to ``contextlib.suppress`` in order to be more consistent with existing
+ descriptions of that operation elsewhere in the language and standard
+ library documentation (Patch by Zero Piraeus).
+
+- Issue #18891: Completed the new email package (provisional) API additions
+ by adding new classes EmailMessage, MIMEPart, and ContentManager.
+
+- Issue #18281: Unused stat constants removed from `tarfile`.
+
+- Issue #18999: Multiprocessing now supports 'contexts' with the same API
+ as the module, but bound to specified start methods.
+
+- Issue #18468: The re.split, re.findall, and re.sub functions and the group()
+ and groups() methods of match object now always return a string or a bytes
+ object.
+
+- Issue #18725: The textwrap module now supports truncating multiline text.
+
+- Issue #18776: atexit callbacks now display their full traceback when they
+ raise an exception.
+
+- Issue #17827: Add the missing documentation for ``codecs.encode`` and
+ ``codecs.decode``.
+
+- Issue #19218: Rename collections.abc to _collections_abc in order to
+ speed up interpreter start.
+
+- Issue #18582: Add 'pbkdf2_hmac' to the hashlib module. It implements PKCS#5
+ password-based key derivation functions with HMAC as pseudorandom function.
+
+- Issue #19131: The aifc module now correctly reads and writes sampwidth of
+ compressed streams.
+
+- Issue #19209: Remove import of copyreg from the os module to speed up
+ interpreter startup. stat_result and statvfs_result are now hard-coded to
+ reside in the os module.
+
+- Issue #19205: Don't import the 're' module in site and sysconfig module to
+ speed up interpreter start.
+
+- Issue #9548: Add a minimal "_bootlocale" module that is imported by the
+ _io module instead of the full locale module.
+
+- Issue #18764: Remove the 'print' alias for the PDB 'p' command so that it no
+ longer shadows the print function.
+
+- Issue #19158: A rare race in BoundedSemaphore could allow .release() too
+ often.
+
+- Issue #15805: Add contextlib.redirect_stdout().
+
+- Issue #18716: Deprecate the formatter module.
+
+- Issue #10712: 2to3 has a new "asserts" fixer that replaces deprecated names
+ of unittest methods (e.g. failUnlessEqual -> assertEqual).
+
+- Issue #18037: 2to3 now escapes ``'\u'`` and ``'\U'`` in native strings.
+
+- Issue #17839: base64.decodebytes and base64.encodebytes now accept any
+ object that exports a 1 dimensional array of bytes (this means the same
+ is now also true for base64_codec)
+
+- Issue #19132: The pprint module now supports compact mode.
+
+- Issue #19137: The pprint module now correctly formats instances of set and
+ frozenset subclasses.
+
+- Issue #10042: functools.total_ordering now correctly handles
+ NotImplemented being returned by the underlying comparison function (Patch
+ by Katie Miller)
+
+- Issue #19092: contextlib.ExitStack now correctly reraises exceptions
+ from the __exit__ callbacks of inner context managers (Patch by Hrvoje
+ Nikšić)
+
+- Issue #12641: Avoid passing "-mno-cygwin" to the mingw32 compiler, except
+ when necessary. Patch by Oscar Benjamin.
+
+- Issue #5845: In site.py, only load readline history from ~/.python_history
+ if no history has been read already. This avoids double writes to the
+ history file at shutdown.
+
+- Properly initialize all fields of a SSL object after allocation.
+
+- Issue #19095: SSLSocket.getpeercert() now raises ValueError when the
+ SSL handshake hasn't been done.
+
+- Issue #4366: Fix building extensions on all platforms when --enable-shared
+ is used.
+
+- Issue #19030: Fixed `inspect.getmembers` and `inspect.classify_class_attrs`
+ to attempt activating descriptors before falling back to a __dict__ search
+ for faulty descriptors. `inspect.classify_class_attrs` no longer returns
+ Attributes whose home class is None.
+
+C API
+-----
+
+- Issue #1772673: The type of `char*` arguments now changed to `const char*`.
+
+- Issue #16129: Added a `Py_SetStandardStreamEncoding` pre-initialization API
+ to allow embedding applications like Blender to force a particular
+ encoding and error handler for the standard IO streams (initial patch by
+ Bastien Montagne)
+
+Tests
+-----
+
+- Issue #19275: Fix test_site on AMD64 Snow Leopard
+
+- Issue #14407: Fix unittest test discovery in test_concurrent_futures.
+
+- Issue #18919: Unified and extended tests for audio modules: aifc, sunau and
+ wave.
+
+- Issue #18714: Added tests for ``pdb.find_function()``.
+
+Documentation
+-------------
+
+- Issue #18758: Fixed and improved cross-references.
+
+- Issue #18972: Modernize email examples and use the argparse module in them.
+
+Build
+-----
+
+- Issue #19130: Correct PCbuild/readme.txt, Python 3.3 and 3.4 require VS 2010.
+
+- Issue #15663: Update OS X 10.6+ installer to use Tcl/Tk 8.5.15.
+
+- Issue #14499: Fix several problems with OS X universal build support:
+ 1. ppc arch detection for extension module builds broke with Xcode 5
+ 2. ppc arch detection in configure did not work on OS X 10.4
+ 3. -sysroot and -arch flags were unnecessarily duplicated
+ 4. there was no obvious way to configure an intel-32 only build.
+
+- Issue #19019: Change the OS X installer build script to use CFLAGS instead
+ of OPT for special build options. By setting OPT, some compiler-specific
+ options like -fwrapv were overridden and thus not used, which could result
+ in broken interpreters when building with clang.
+
+
+What's New in Python 3.4.0 Alpha 3?
+===================================
+
+Release date: 2013-09-29
+
+Core and Builtins
+-----------------
+
+- Issue #18818: The "encodingname" part of PYTHONIOENCODING is now optional.
+
+- Issue #19098: Prevent overflow in the compiler when the recursion limit is set
+ absurdly high.
+
+Library
+-------
+
+- Issue #18929: `inspect.classify_class_attrs()` now correctly finds class
+ attributes returned by `dir()` that are located in the metaclass.
+
+- Issue #18950: Fix miscellaneous bugs in the sunau module.
+ Au_read.readframes() now updates current file position and reads correct
+ number of frames from multichannel stream. Au_write.writeframesraw() now
+ correctly updates current file position. Au_read.getnframes() now returns an
+ integer (as in Python 2). Au_read and Au_write now correctly works with file
+ object if start file position is not a zero.
+
+- Issue #18594: The fast path for collections.Counter() was never taken
+ due to an over-restrictive type check.
+
+- Issue #19053: ZipExtFile.read1() with non-zero argument no more returns empty
+ bytes until end of data.
+
+- logging: added support for Unix domain sockets to SocketHandler and
+ DatagramHandler.
+
+- Issue #18996: TestCase.assertEqual() now more cleverly shorten differing
+ strings in error report.
+
+- Issue #19034: repr() for tkinter.Tcl_Obj now exposes string reperesentation.
+
+- Issue #18978: ``urllib.request.Request`` now allows the method to be
+ indicated on the class and no longer sets it to None in ``__init__``.
+
+- Issue #18626: the inspect module now offers a basic command line
+ introspection interface (Initial patch by Claudiu Popa)
+
+- Issue #3015: Fixed tkinter with wantobject=False. Any Tcl command call
+ returned empty string.
+
+- Issue #19037: The mailbox module now makes all changes to maildir files
+ before moving them into place, to avoid race conditions with other programs
+ that may be accessing the maildir directory.
+
+- Issue #14984: On POSIX systems, when netrc is called without a filename
+ argument (and therefore is reading the user's $HOME/.netrc file), it now
+ enforces the same security rules as typical ftp clients: the .netrc file must
+ be owned by the user that owns the process and must not be readable by any
+ other user.
+
+- Issue #18873: The tokenize module now detects Python source code encoding
+ only in comment lines.
+
+- Issue #17764: Enable http.server to bind to a user specified network
+ interface. Patch contributed by Malte Swart.
+
+- Issue #18937: Add an assertLogs() context manager to unittest.TestCase
+ to ensure that a block of code emits a message using the logging module.
+
+- Issue #17324: Fix http.server's request handling case on trailing '/'. Patch
+ contributed by Vajrasky Kok.
+
+- Issue #19018: The heapq.merge() function no longer suppresses IndexError
+ in the underlying iterables.
+
+- Issue #18784: The uuid module no longer attempts to load libc via ctypes.CDLL
+ if all the necessary functions have already been found in libuuid. Patch by
+ Evgeny Sologubov.
+
+- The :envvar:`PYTHONFAULTHANDLER` environment variable now only enables the
+ faulthandler module if the variable is non-empty. Same behaviour than other
+ variables like :envvar:`PYTHONDONTWRITEBYTECODE`.
+
+- Issue #1565525: New function ``traceback.clear_frames`` will clear
+ the local variables of all the stack frames referenced by a traceback
+ object.
+
+Tests
+-----
+
+- Issue #18952: Fix regression in support data downloads introduced when
+ test.support was converted to a package. Regression noticed by Zachary
+ Ware.
+
+IDLE
+----
+
+- Issue #18873: IDLE now detects Python source code encoding only in comment
+ lines.
+
+- Issue #18988: The "Tab" key now works when a word is already autocompleted.
+
+Documentation
+-------------
+
+- Issue #17003: Unified the size argument names in the io module with common
+ practice.
+
+Build
+-----
+
+- Issue #18596: Support the use of address sanity checking in recent versions
+ of clang and GCC by appropriately marking known false alarms in the small
+ object allocator. Patch contributed by Dhiru Kholia.
+
+Tools/Demos
+-----------
+
+- Issue #18873: 2to3 and the findnocoding.py script now detect Python source
+ code encoding only in comment lines.
+
+
+What's New in Python 3.4.0 Alpha 2?
+===================================
+
+Release date: 2013-09-09
+
+Core and Builtins
+-----------------
+
+- Issue #18942: sys._debugmallocstats() output was damaged on Windows.
+
+- Issue #18571: Implementation of the PEP 446: file descriptors and file
+ handles are now created non-inheritable; add functions
+ os.get/set_inheritable(), os.get/set_handle_inheritable() and
+ socket.socket.get/set_inheritable().
+
+- Issue #11619: The parser and the import machinery do not encode Unicode
+ filenames anymore on Windows.
+
+- Issue #18808: Non-daemon threads are now automatically joined when
+ a sub-interpreter is shutdown (it would previously dump a fatal error).
+
+- Remove support for compiling on systems without getcwd().
+
+- Issue #18774: Remove last bits of GNU PTH thread code and thread_pth.h.
+
+- Issue #18771: Add optimization to set object lookups to reduce the cost
+ of hash collisions. The core idea is to inspect a second key/hash pair
+ for each cache line retrieved.
+
+- Issue #16105: When a signal handler fails to write to the file descriptor
+ registered with ``signal.set_wakeup_fd()``, report an exception instead
+ of ignoring the error.
+
+- Issue #18722: Remove uses of the "register" keyword in C code.
+
+- Issue #18667: Add missing "HAVE_FCHOWNAT" symbol to posix._have_functions.
+
+- Issue #16499: Add command line option for isolated mode.
+
+- Issue #15301: Parsing fd, uid, and gid parameters for builtins
+ in Modules/posixmodule.c is now far more robust.
+
+- Issue #18368: PyOS_StdioReadline() no longer leaks memory when realloc()
+ fail.
+
+- Issue #17934: Add a clear() method to frame objects, to help clean up
+ expensive details (local variables) and break reference cycles.
+
+- Issue #18780: %-formatting codes %d, %i, and %u now treat int-subclasses
+ as int (displays value of int-subclass instead of str(int-subclass) ).
+
+Library
+-------
+
+- Issue #18808: Thread.join() now waits for the underlying thread state to
+ be destroyed before returning. This prevents unpredictable aborts in
+ Py_EndInterpreter() when some non-daemon threads are still running.
+
+- Issue #18458: Prevent crashes with newer versions of libedit. Its readline
+ emulation has changed from 0-based indexing to 1-based like gnu readline.
+
+- Issue #18852: Handle case of ``readline.__doc__`` being ``None`` in the new
+ readline activation code in ``site.py``.
+
+- Issue #18672: Fixed format specifiers for Py_ssize_t in debugging output in
+ the _sre module.
+
+- Issue #18830: inspect.getclasstree() no longer produces duplicate entries even
+ when input list contains duplicates.
+
+- Issue #18878: sunau.open now supports the context management protocol. Based on
+ patches by Claudiu Popa and R. David Murray.
+
+- Issue #18909: Fix _tkinter.tkapp.interpaddr() on Windows 64-bit, don't cast
+ 64-bit pointer to long (32 bits).
+
+- Issue #18876: The FileIO.mode attribute now better reflects the actual mode
+ under which the file was opened. Patch by Erik Bray.
+
+- Issue #16853: Add new selectors module.
+
+- Issue #18882: Add threading.main_thread() function.
+
+- Issue #18901: The sunau getparams method now returns a namedtuple rather than
+ a plain tuple. Patch by Claudiu Popa.
+
+- Issue #17487: The result of the wave getparams method now is pickleable again.
+ Patch by Claudiu Popa.
+
+- Issue #18756: os.urandom() now uses a lazily-opened persistent file
+ descriptor, so as to avoid using many file descriptors when run in
+ parallel from multiple threads.
+
+- Issue #18418: After fork(), reinit all threads states, not only active ones.
+ Patch by A. Jesse Jiryu Davis.
+
+- Issue #17974: Switch unittest from using getopt to using argparse.
+
+- Issue #11798: TestSuite now drops references to own tests after execution.
+
+- Issue #16611: http.cookie now correctly parses the 'secure' and 'httponly'
+ cookie flags.
+
+- Issue #11973: Fix a problem in kevent. The flags and fflags fields are now
+ properly handled as unsigned.
+
+- Issue #18807: ``pyvenv`` now takes a --copies argument allowing copies
+ instead of symlinks even where symlinks are available and the default.
+
+- Issue #18538: ``python -m dis`` now uses argparse for argument processing.
+ Patch by Michele Orrù.
+
+- Issue #18394: Close cgi.FieldStorage's optional file.
+
+- Issue #17702: On error, os.environb now suppresses the exception context
+ when raising a new KeyError with the original key.
+
+- Issue #16809: Fixed some tkinter incompabilities with Tcl/Tk 8.6.
+
+- Issue #16809: Tkinter's splitlist() and split() methods now accept Tcl_Obj
+ argument.
+
+- Issue #18324: set_payload now correctly handles binary input. This also
+ supersedes the previous fixes for #14360, #1717, and #16564.
+
+- Issue #18794: Add a fileno() method and a closed attribute to select.devpoll
+ objects.
+
+- Issue #17119: Fixed integer overflows when processing large strings and tuples
+ in the tkinter module.
+
+- Issue #18747: Re-seed OpenSSL's pseudo-random number generator after fork.
+ A pthread_atfork() parent handler is used to seed the PRNG with pid, time
+ and some stack data.
+
+- Issue #8865: Concurrent invocation of select.poll.poll() now raises a
+ RuntimeError exception. Patch by Christian Schubert.
+
+- Issue #18777: The ssl module now uses the new CRYPTO_THREADID API of
+ OpenSSL 1.0.0+ instead of the deprecated CRYPTO id callback function.
+
+- Issue #18768: Correct doc string of RAND_edg(). Patch by Vajrasky Kok.
+
+- Issue #18178: Fix ctypes on BSD. dlmalloc.c was compiled twice which broke
+ malloc weak symbols.
+
+- Issue #18709: Fix CVE-2013-4238. The SSL module now handles NULL bytes
+ inside subjectAltName correctly. Formerly the module has used OpenSSL's
+ GENERAL_NAME_print() function to get the string represention of ASN.1
+ strings for ``rfc822Name`` (email), ``dNSName`` (DNS) and
+ ``uniformResourceIdentifier`` (URI).
+
+- Issue #18701: Remove support of old CPython versions (<3.0) from C code.
+
+- Issue #18756: Improve error reporting in os.urandom() when the failure
+ is due to something else than /dev/urandom not existing (for example,
+ exhausting the file descriptor limit).
+
+- Issue #18673: Add O_TMPFILE to os module. O_TMPFILE requires Linux kernel
+ 3.11 or newer. It's only defined on system with 3.11 uapi headers, too.
+
+- Issue #18532: Change the builtin hash algorithms' names to lower case names
+ as promised by hashlib's documentation.
+
+- Issue #8713: add new spwan and forkserver start methods, and new functions
+ get_all_start_methods, get_start_method, and set_start_method, to
+ multiprocessing.
+
+- Issue #18405: Improve the entropy of crypt.mksalt().
+
+- Issue #12015: The tempfile module now uses a suffix of 8 random characters
+ instead of 6, to reduce the risk of filename collision. The entropy was
+ reduced when uppercase letters were removed from the charset used to generate
+ random characters.
+
+- Issue #18585: Add :func:`textwrap.shorten` to collapse and truncate a
+ piece of text to a given length.
+
+- Issue #18598: Tweak exception message for importlib.import_module() to
+ include the module name when a key argument is missing.
+
+- Issue #19151: Fix docstring and use of _get_supported_file_loaders() to
+ reflect 2-tuples.
+
+- Issue #19152: Add ExtensionFileLoader.get_filename().
+
+- Issue #18676: Change 'positive' to 'non-negative' in queue.py put and get
+ docstrings and ValueError messages. Patch by Zhongyue Luo
+
+- Fix refcounting issue with extension types in tkinter.
+
+- Issue #8112: xlmrpc.server's DocXMLRPCServer server no longer raises an error
+ if methods have annotations; it now correctly displays the annotations.
+
+- Issue #18600: Added policy argument to email.message.Message.as_string,
+ and as_bytes and __bytes__ methods to Message.
+
+- Issue #18671: Output more information when logging exceptions occur.
+
+- Issue #18621: Prevent the site module's patched builtins from keeping
+ too many references alive for too long.
+
+- Issue #4885: Add weakref support to mmap objects. Patch by Valerie Lambert.
+
+- Issue #8860: Fixed rounding in timedelta constructor.
+
+- Issue #18849: Fixed a Windows-specific tempfile bug where collision with an
+ existing directory caused mkstemp and related APIs to fail instead of
+ retrying. Report and fix by Vlad Shcherbina.
+
+- Issue #18920: argparse's default destination for the version action (-v,
+ --version) has also been changed to stdout, to match the Python executable.
+
+Tests
+-----
+
+- Issue #18623: Factor out the _SuppressCoreFiles context manager into
+ test.support. Patch by Valerie Lambert.
+
+- Issue #12037: Fix test_email for desktop Windows.
+
+- Issue #15507: test_subprocess's test_send_signal could fail if the test
+ runner were run in an environment where the process inherited an ignore
+ setting for SIGINT. Restore the SIGINT handler to the desired
+ KeyboardInterrupt raising one during that test.
+
+- Issue #16799: Switched from getopt to argparse style in regrtest's argument
+ parsing. Added more tests for regrtest's argument parsing.
+
+- Issue #18792: Use "127.0.0.1" or "::1" instead of "localhost" as much as
+ possible, since "localhost" goes through a DNS lookup under recent Windows
+ versions.
+
+IDLE
+----
+
+- Issue #18489: Add tests for SearchEngine. Original patch by Phil Webster.
+
+Documentation
+-------------
+
+- Issue #18743: Fix references to non-existant "StringIO" module.
+
+- Issue #18783: Removed existing mentions of Python long type in docstrings,
+ error messages and comments.
+
+Build
+-----
+
+- Issue #1584: Provide configure options to override default search paths for
+ Tcl and Tk when building _tkinter.
+
+- Issue #15663: Tcl/Tk 8.5.14 is now included with the OS X 10.6+ 64-/32-bit
+ installer. It is no longer necessary to install a third-party version of
+ Tcl/Tk 8.5 to work around the problems in the Apple-supplied Tcl/Tk 8.5
+ shipped in OS X 10.6 and later releases.
+
+Tools/Demos
+-----------
+
+- Issue #18922: Now The Lib/smtpd.py and Tools/i18n/msgfmt.py scripts write
+ their version strings to stdout, and not to sderr.
+
+
+What's New in Python 3.4.0 Alpha 1?
+===================================
+
+Release date: 2013-08-03
+
+Core and Builtins
+-----------------
+
+- Issue #16741: Fix an error reporting in int().
+
+- Issue #17899: Fix rare file descriptor leak in os.listdir().
+
+- Issue #10241: Clear extension module dict copies at interpreter shutdown.
+ Patch by Neil Schemenauer, minimally modified.
+
+- Issue #9035: ismount now recognises volumes mounted below a drive root
+ on Windows. Original patch by Atsuo Ishimoto.
+
+- Issue #18214: Improve finalization of Python modules to avoid setting
+ their globals to None, in most cases.
+
+- Issue #18112: PEP 442 implementation (safe object finalization).
+
+- Issue #18552: Check return value of PyArena_AddPyObject() in
+ obj2ast_object().
+
+- Issue #18560: Fix potential NULL pointer dereference in sum().
+
+- Issue #18520: Add a new PyStructSequence_InitType2() function, same than
+ PyStructSequence_InitType() except that it has a return value (0 on success,
+ -1 on error).
+
+- Issue #15905: Fix theoretical buffer overflow in handling of sys.argv[0],
+ prefix and exec_prefix if the operation system does not obey MAXPATHLEN.
+
+- Issue #18408: Fix many various bugs in code handling errors, especially
+ on memory allocation failure (MemoryError).
+
+- Issue #18344: Fix potential ref-leaks in _bufferedreader_read_all().
+
+- Issue #18342: Use the repr of a module name when an import fails when using
+ ``from ... import ...``.
+
+- Issue #17872: Fix a segfault in marshal.load() when input stream returns
+ more bytes than requested.
+
+- Issue #18338: `python --version` now prints version string to stdout, and
+ not to stderr. Patch by Berker Peksag and Michael Dickens.
+
+- Issue #18426: Fix NULL pointer dereference in C extension import when
+ PyModule_GetDef() returns an error.
+
+- Issue #17206: On Windows, increase the stack size from 2 MB to 4.2 MB to fix
+ a stack overflow in the marshal module (fix a crash in test_marshal).
+ Patch written by Jeremy Kloth.
+
+- Issue #3329: Implement the PEP 445: Add new APIs to customize Python memory
+ allocators.
+
+- Issue #18328: Reorder ops in PyThreadState_Delete*() functions. Now the
+ tstate is first removed from TLS and then deallocated.
+
+- Issue #13483: Use VirtualAlloc in obmalloc on Windows.
+
+- Issue #18184: PyUnicode_FromFormat() and PyUnicode_FromFormatV() now raise
+ OverflowError when an argument of %c format is out of range.
+
+- Issue #18111: The min() and max() functions now support a default argument
+ to be returned instead of raising a ValueError on an empty sequence.
+ (Contributed by Julian Berman.)
+
+- Issue #18137: Detect integer overflow on precision in float.__format__()
+ and complex.__format__().
+
+- Issue #18183: Fix various unicode operations on strings with large unicode
+ codepoints.
+
+- Issue #18180: Fix ref leak in _PyImport_GetDynLoadWindows().
+
+- Issue #18038: SyntaxError raised during compilation sources with illegal
+ encoding now always contains an encoding name.
+
+- Issue #17931: Resolve confusion on Windows between pids and process
+ handles.
+
+- Tweak the exception message when the magic number or size value in a bytecode
+ file is truncated.
+
+- Issue #17932: Fix an integer overflow issue on Windows 64-bit in iterators:
+ change the C type of seqiterobject.it_index from long to Py_ssize_t.
+
+- Issue #18065: Don't set __path__ to the package name for frozen packages.
+
+- Issue #18088: When reloading a module, unconditionally reset all relevant
+ attributes on the module (e.g. __name__, __loader__, __package__, __file__,
+ __cached__).
+
+- Issue #17937: Try harder to collect cyclic garbage at shutdown.
+
+- Issue #12370: Prevent class bodies from interfering with the __class__
+ closure.
+
+- Issue #17644: Fix a crash in str.format when curly braces are used in square
+ brackets.
+
+- Issue #17237: Fix crash in the ASCII decoder on m68k.
+
+- Issue #17927: Frame objects kept arguments alive if they had been
+ copied into a cell, even if the cell was cleared.
+
+- Issue #1545463: At shutdown, defer finalization of codec modules so
+ that stderr remains usable.
+
+- Issue #7330: Implement width and precision (ex: "%5.3s") for the format
+ string of PyUnicode_FromFormat() function, original patch written by Ysj Ray.
+
+- Issue #1545463: Global variables caught in reference cycles are now
+ garbage-collected at shutdown.
+
+- Issue #17094: Clear stale thread states after fork(). Note that this
+ is a potentially disruptive change since it may release some system
+ resources which would otherwise remain perpetually alive (e.g. database
+ connections kept in thread-local storage).
+
+- Issue #17408: Avoid using an obsolete instance of the copyreg module when
+ the interpreter is shutdown and then started again.
+
+- Issue #5845: Enable tab-completion in the interactive interpreter by
+ default, thanks to a new sys.__interactivehook__.
+
+- Issue #17115,17116: Module initialization now includes setting __package__ and
+ __loader__ attributes to None.
+
+- Issue #17853: Ensure locals of a class that shadow free variables always win
+ over the closures.
+
+- Issue #17863: In the interactive console, don't loop forever if the encoding
+ can't be fetched from stdin.
+
+- Issue #17867: Raise an ImportError if __import__ is not found in __builtins__.
+
+- Issue #18698: Ensure importlib.reload() returns the module out of sys.modules.
+
+- Issue #17857: Prevent build failures with pre-3.5.0 versions of sqlite3,
+ such as was shipped with Centos 5 and Mac OS X 10.4.
+
+- Issue #17413: sys.settrace callbacks were being passed a string instead of an
+ exception instance for the 'value' element of the arg tuple if the exception
+ originated from C code; now an exception instance is always provided.
+
+- Issue #17782: Fix undefined behaviour on platforms where
+ ``struct timespec``'s "tv_nsec" member is not a C long.
+
+- Issue #17722: When looking up __round__, resolve descriptors.
+
+- Issue #16061: Speed up str.replace() for replacing 1-character strings.
+
+- Issue #17715: Fix segmentation fault from raising an exception in a __trunc__
+ method.
+
+- Issue #17643: Add __callback__ attribute to weakref.ref.
+
+- Issue #16447: Fixed potential segmentation fault when setting __name__ on a
+ class.
+
+- Issue #17669: Fix crash involving finalization of generators using yield from.
+
+- Issue #14439: Python now prints the traceback on runpy failure at startup.
+
+- Issue #17469: Fix _Py_GetAllocatedBlocks() and sys.getallocatedblocks()
+ when running on valgrind.
+
+- Issue #17619: Make input() check for Ctrl-C correctly on Windows.
+
+- Issue #17357: Add missing verbosity messages for -v/-vv that were lost during
+ the importlib transition.
+
+- Issue #17610: Don't rely on non-standard behavior of the C qsort() function.
+
+- Issue #17323: The "[X refs, Y blocks]" printed by debug builds has been
+ disabled by default. It can be re-enabled with the `-X showrefcount` option.
+
+- Issue #17328: Fix possible refleak in dict.setdefault.
+
+- Issue #17275: Corrected class name in init error messages of the C version of
+ BufferedWriter and BufferedRandom.
+
+- Issue #7963: Fixed misleading error message that issued when object is
+ called without arguments.
+
+- Issue #8745: Small speed up zipimport on Windows. Patch by Catalin Iacob.
+
+- Issue #5308: Raise ValueError when marshalling too large object (a sequence
+ with size >= 2**31), instead of producing illegal marshal data.
+
+- Issue #12983: Bytes literals with invalid ``\x`` escape now raise a SyntaxError
+ and a full traceback including line number.
+
+- Issue #16967: In function definition, evaluate positional defaults before
+ keyword-only defaults.
+
+- Issue #17173: Remove uses of locale-dependent C functions (isalpha() etc.)
+ in the interpreter.
+
+- Issue #17137: When an Unicode string is resized, the internal wide character
+ string (wstr) format is now cleared.
+
+- Issue #17043: The unicode-internal decoder no longer read past the end of
+ input buffer.
+
+- Issue #17098: All modules now have __loader__ set even if they pre-exist the
+ bootstrapping of importlib.
+
+- Issue #16979: Fix error handling bugs in the unicode-escape-decode decoder.
+
+- Issue #16772: The base argument to the int constructor no longer accepts
+ floats, or other non-integer objects with an __int__ method. Objects
+ with an __index__ method are now accepted.
+
+- Issue #10156: In the interpreter's initialization phase, unicode globals
+ are now initialized dynamically as needed.
+
+- Issue #16980: Fix processing of escaped non-ascii bytes in the
+ unicode-escape-decode decoder.
+
+- Issue #16975: Fix error handling bug in the escape-decode bytes decoder.
+
+- Issue #14850: Now a charmap decoder treats U+FFFE as "undefined mapping"
+ in any mapping, not only in a string.
+
+- Issue #16613: Add *m* argument to ``collections.Chainmap.new_child`` to
+ allow the new child map to be specified explicitly.
+
+- Issue #16730: importlib.machinery.FileFinder now no longers raises an
+ exception when trying to populate its cache and it finds out the directory is
+ unreadable or has turned into a file. Reported and diagnosed by
+ David Pritchard.
+
+- Issue #16906: Fix a logic error that prevented most static strings from being
+ cleared.
+
+- Issue #11461: Fix the incremental UTF-16 decoder. Original patch by
+ Amaury Forgeot d'Arc.
+
+- Issue #16856: Fix a segmentation fault from calling repr() on a dict with
+ a key whose repr raise an exception.
+
+- Issue #16367: Fix FileIO.readall() on Windows for files larger than 2 GB.
+
+- Issue #16761: Calling int() with base argument only now raises TypeError.
+
+- Issue #16759: Support the full DWORD (unsigned long) range in Reg2Py
+ when retrieving a REG_DWORD value. This corrects functions like
+ winreg.QueryValueEx that may have been returning truncated values.
+
+- Issue #14420: Support the full DWORD (unsigned long) range in Py2Reg
+ when passed a REG_DWORD value. Fixes OverflowError in winreg.SetValueEx.
+
+- Issue #11939: Set the st_dev attribute of stat_result to allow Windows to
+ take advantage of the os.path.samefile/sameopenfile/samestat implementations
+ used by other platforms.
+
+- Issue #16772: The int() constructor's second argument (base) no longer
+ accepts non integer values. Consistent with the behavior in Python 2.
+
+- Issue #14470: Remove w9xpopen support per PEP 11.
+
+- Issue #9856: Replace deprecation warning with raising TypeError
+ in object.__format__. Patch by Florent Xicluna.
+
+- Issue #16597: In buffered and text IO, call close() on the underlying stream
+ if invoking flush() fails.
+
+- Issue #16722: In the bytes() constructor, try to call __bytes__ on the
+ argument before __index__.
+
+- Issue #16421: loading multiple modules from one shared object is now
+ handled correctly (previously, the first module loaded from that file
+ was silently returned). Patch by Václav Šmilauer.
+
+- Issue #16602: When a weakref's target was part of a long deallocation
+ chain, the object could remain reachable through its weakref even though
+ its refcount had dropped to zero.
+
+- Issue #16495: Remove extraneous NULL encoding check from bytes_decode().
+
+- Issue #16619: Create NameConstant AST class to represent None, True, and False
+ literals. As a result, these constants are never loaded at runtime from
+ builtins.
+
+- Issue #16455: On FreeBSD and Solaris, if the locale is C, the
+ ASCII/surrogateescape codec is now used (instead of the locale encoding) to
+ decode the command line arguments. This change fixes inconsistencies with
+ os.fsencode() and os.fsdecode(), because these operating systems announce an
+ ASCII locale encoding, but actually use the ISO-8859-1 encoding in practice.
+
+- Issue #16562: Optimize dict equality testing. Patch by Serhiy Storchaka.
+
+- Issue #16588: Silence unused-but-set warnings in Python/thread_pthread
+
+- Issue #16592: stringlib_bytes_join doesn't raise MemoryError on allocation
+ failure.
+
+- Issue #16546: Fix: ast.YieldFrom argument is now mandatory.
+
+- Issue #16514: Fix regression causing a traceback when sys.path[0] is None
+ (actually, any non-string or non-bytes type).
+
+- Issue #16306: Fix multiple error messages when unknown command line
+ parameters where passed to the interpreter. Patch by Hieu Nguyen.
+
+- Issue #16215: Fix potential double memory free in str.replace(). Patch
+ by Serhiy Storchaka.
+
+- Issue #16290: A float return value from the __complex__ special method is no
+ longer accepted in the complex() constructor.
+
+- Issue #16416: On Mac OS X, operating system data are now always
+ encoded/decoded to/from UTF-8/surrogateescape, instead of the locale encoding
+ (which may be ASCII if no locale environment variable is set), to avoid
+ inconsistencies with os.fsencode() and os.fsdecode() functions which are
+ already using UTF-8/surrogateescape.
+
+- Issue #16453: Fix equality testing of dead weakref objects.
+
+- Issue #9535: Fix pending signals that have been received but not yet
+ handled by Python to not persist after os.fork() in the child process.
+
+- Issue #14794: Fix slice.indices to return correct results for huge values,
+ rather than raising OverflowError.
+
+- Issue #15001: fix segfault on "del sys.modules['__main__']". Patch by Victor
+ Stinner.
+
+- Issue #8271: the utf-8 decoder now outputs the correct number of U+FFFD
+ characters when used with the 'replace' error handler on invalid utf-8
+ sequences. Patch by Serhiy Storchaka, tests by Ezio Melotti.
+
+- Issue #5765: Apply a hard recursion limit in the compiler instead of
+ blowing the stack and segfaulting. Initial patch by Andrea Griffini.
+
+- Issue #16402: When slicing a range, fix shadowing of exceptions from
+ __index__.
+
+- Issue #16336: fix input checking in the surrogatepass error handler.
+ Patch by Serhiy Storchaka.
+
+- Issue #8401: assigning an int to a bytearray slice (e.g. b[3:4] = 5) now
+ raises an error.
+
+- Issue #7317: Display full tracebacks when an error occurs asynchronously.
+ Patch by Alon Horev with update by Alexey Kachayev.
+
+- Issue #16309: Make PYTHONPATH="" behavior the same as if PYTHONPATH
+ not set at all.
+
+- Issue #10189: Improve the error reporting of SyntaxErrors related to global
+ and nonlocal statements.
+
+- Fix segfaults on setting __qualname__ on builtin types and attempting to
+ delete it on any type.
+
+- Issue #14625: Rewrite the UTF-32 decoder. It is now 3x to 4x faster. Patch
+ written by Serhiy Storchaka.
+
+- Issue #16345: Fix an infinite loop when ``fromkeys`` on a dict subclass
+ received a nonempty dict from the constructor.
+
+- Issue #16271: Fix strange bugs that resulted from __qualname__ appearing in a
+ class's __dict__ and on type.
+
+- Issue #12805: Make bytes.join and bytearray.join faster when the separator
+ is empty. Patch by Serhiy Storchaka.
+
+- Issue #6074: Ensure cached bytecode files can always be updated by the
+ user that created them, even when the source file is read-only.
+
+- Issue #15958: bytes.join and bytearray.join now accept arbitrary buffer
+ objects.
+
+- Issue #14783: Improve int() docstring and switch docstrings for str(),
+ range(), and slice() to use multi-line signatures.
+
+- Issue #16160: Subclass support now works for types.SimpleNamespace.
+
+- Issue #16148: Implement PEP 424, adding operator.length_hint and
+ PyObject_LengthHint.
+
+- Upgrade Unicode data (UCD) to version 6.2.
+
+- Issue #15379: Fix passing of non-BMP characters as integers for the charmap
+ decoder (already working as unicode strings). Patch by Serhiy Storchaka.
+
+- Issue #15144: Fix possible integer overflow when handling pointers as integer
+ values, by using `Py_uintptr_t` instead of `size_t`. Patch by Serhiy
+ Storchaka.
+
+- Issue #15965: Explicitly cast `AT_FDCWD` as (int). Required on Solaris 10
+ (which defines `AT_FDCWD` as ``0xffd19553``), harmless on other platforms.
+
+- Issue #15839: Convert SystemErrors in `super()` to RuntimeErrors.
+
+- Issue #15448: Buffered IO now frees the buffer when closed, instead
+ of when deallocating.
+
+- Issue #15846: Fix SystemError which happened when using `ast.parse()` in an
+ exception handler on code with syntax errors.
+
+- Issue #15897: zipimport.c doesn't check return value of fseek().
+ Patch by Felipe Cruz.
+
+- Issue #15801: Make sure mappings passed to '%' formatting are actually
+ subscriptable.
+
+- Issue #15111: __import__ should propagate ImportError when raised as a
+ side-effect of a module triggered from using fromlist.
+
+- Issue #15022: Add pickle and comparison support to types.SimpleNamespace.
+
+Library
+-------
+
+- Issue #4331: Added functools.partialmethod (Initial patch by Alon Horev)
+
+- Issue #13461: Fix a crash in the TextIOWrapper.tell method on 64-bit
+ platforms. Patch by Yogesh Chaudhari.
+
+- Issue #18681: Fix a NameError in importlib.reload() (noticed by Weizhao Li).
+
+- Issue #14323: Expanded the number of digits in the coefficients for the
+ RGB -- YIQ conversions so that they match the FCC NTSC versions.
+
+- Issue #17998: Fix an internal error in regular expression engine.
+
+- Issue #17557: Fix os.getgroups() to work with the modified behavior of
+ getgroups(2) on OS X 10.8. Original patch by Mateusz Lenik.
+
+- Issue #18608: Avoid keeping a strong reference to the locale module
+ inside the _io module.
+
+- Issue #18619: Fix atexit leaking callbacks registered from sub-interpreters,
+ and make it GC-aware.
+
+- Issue #15699: The readline module now uses PEP 3121-style module
+ initialization, so as to reclaim allocated resources (Python callbacks)
+ at shutdown. Original patch by Robin Schreiber.
+
+- Issue #17616: wave.open now supports the context management protocol.
+
+- Issue #18599: Fix name attribute of _sha1.sha1() object. It now returns
+ 'SHA1' instead of 'SHA'.
+
+- Issue #13266: Added inspect.unwrap to easily unravel __wrapped__ chains
+ (initial patch by Daniel Urban and Aaron Iles)
+
+- Issue #18561: Skip name in ctypes' _build_callargs() if name is NULL.
+
+- Issue #18559: Fix NULL pointer dereference error in _pickle module
+
+- Issue #18556: Check the return type of PyUnicode_AsWideChar() in ctype's
+ U_set().
+
+- Issue #17818: aifc.getparams now returns a namedtuple.
+
+- Issue #18549: Eliminate dead code in socket_ntohl()
+
+- Issue #18530: Remove additional stat call from posixpath.ismount.
+ Patch by Alex Gaynor.
+
+- Issue #18514: Fix unreachable Py_DECREF() call in PyCData_FromBaseObj()
+
+- Issue #9177: Calling read() or write() now raises ValueError, not
+ AttributeError, on a closed SSL socket. Patch by Senko Rasic.
+
+- Issue #18513: Fix behaviour of cmath.rect w.r.t. signed zeros on OS X 10.8 +
+ gcc.
+
+- Issue #18479: Changed venv Activate.ps1 to make deactivate a function, and
+ removed Deactivate.ps1.
+
+- Issue #18480: Add missing call to PyType_Ready to the _elementtree extension.
+
+- Issue #17778: Fix test discovery for test_multiprocessing. (Patch by
+ Zachary Ware.)
+
+- Issue #18393: The private module _gestalt and private functions
+ platform._mac_ver_gestalt, platform._mac_ver_lookup and
+ platform._bcd2str have been removed. This does not affect the public
+ interface of the platform module.
+
+- Issue #17482: functools.update_wrapper (and functools.wraps) now set the
+ __wrapped__ attribute correctly even if the underlying function has a
+ __wrapped__ attribute set.
+
+- Issue #18431: The new email header parser now decodes RFC2047 encoded words
+ in structured headers.
+
+- Issue #18432: The sched module's queue method was incorrectly returning
+ an iterator instead of a list.
+
+- Issue #18044: The new email header parser was mis-parsing encoded words where
+ an encoded character immediately followed the '?' that follows the CTE
+ character, resulting in a decoding failure. They are now decoded correctly.
+
+- Issue #18101: Tcl.split() now process strings nested in a tuple as it
+ do with byte strings.
+
+- Issue #18116: getpass was always getting an error when testing /dev/tty,
+ and thus was always falling back to stdin, and would then raise an exception
+ if stdin could not be used (such as /dev/null). It also leaked an open file.
+ All of these issues are now fixed.
+
+- Issue #17198: Fix a NameError in the dbm module. Patch by Valentina
+ Mukhamedzhanova.
+
+- Issue #18013: Fix cgi.FieldStorage to parse the W3C sample form.
+
+- Issue #18020: improve html.escape speed by an order of magnitude.
+ Patch by Matt Bryant.
+
+- Issue #18347: ElementTree's html serializer now preserves the case of
+ closing tags.
+
+- Issue #17261: Ensure multiprocessing's proxies use proper address.
+
+- Issue #18343: faulthandler.register() now keeps the previous signal handler
+ when the function is called twice, so faulthandler.unregister() restores
+ correctly the original signal handler.
+
+- Issue #17097: Make multiprocessing ignore EINTR.
+
+- Issue #18339: Negative ints keys in unpickler.memo dict no longer cause a
+ segfault inside the _pickle C extension.
+
+- Issue #18240: The HMAC module is no longer restricted to bytes and accepts
+ any bytes-like object, e.g. memoryview. Original patch by Jonas Borgström.
+
+- Issue #18224: Removed pydoc script from created venv, as it causes problems
+ on Windows and adds no value over and above python -m pydoc ...
+
+- Issue #18155: The csv module now correctly handles csv files that use
+ a delimter character that has a special meaning in regexes, instead of
+ throwing an exception.
+
+- Issue #14360: encode_quopri can now be successfully used as an encoder
+ when constructing a MIMEApplication object.
+
+- Issue #11390: Add -o and -f command line options to the doctest CLI to
+ specify doctest options (and convert it to using argparse).
+
+- Issue #18135: ssl.SSLSocket.write() now raises an OverflowError if the input
+ string in longer than 2 gigabytes, and ssl.SSLContext.load_cert_chain()
+ raises a ValueError if the password is longer than 2 gigabytes. The ssl
+ module does not support partial write.
+
+- Issue #11016: Add C implementation of the stat module as _stat.
+
+- Issue #18248: Fix libffi build on AIX.
+
+- Issue #18259: Declare sethostname in socketmodule.c for AIX
+
+- Issue #18147: Add diagnostic functions to ssl.SSLContext(). get_ca_list()
+ lists all loaded CA certificates and cert_store_stats() returns amount of
+ loaded X.509 certs, X.509 CA certs and CRLs.
+
+- Issue #18167: cgi.FieldStorage no longer fails to handle multipart/form-data
+ when ``\r\n`` appears at end of 65535 bytes without other newlines.
+
+- Issue #18076: Introduce importlib.util.decode_source().
+
+- Issue #18357: add tests for dictview set difference.
+ Patch by Fraser Tweedale.
+
+- importlib.abc.SourceLoader.get_source() no longer changes SyntaxError or
+ UnicodeDecodeError into ImportError.
+
+- Issue #18058, 18057: Make the namespace package loader meet the
+ importlib.abc.InspectLoader ABC, allowing for namespace packages to work with
+ runpy.
+
+- Issue #17177: The imp module is pending deprecation.
+
+- subprocess: Prevent a possible double close of parent pipe fds when the
+ subprocess exec runs into an error. Prevent a regular multi-close of the
+ /dev/null fd when any of stdin, stdout and stderr was set to DEVNULL.
+
+- Issue #18194: Introduce importlib.util.cache_from_source() and
+ source_from_cache() while documenting the equivalent functions in imp as
+ deprecated.
+
+- Issue #17907: Document imp.new_module() as deprecated in favour of
+ types.ModuleType.
+
+- Issue #18192: Introduce importlib.util.MAGIC_NUMBER and document as deprecated
+ imp.get_magic().
+
+- Issue #18149: Add filecmp.clear_cache() to manually clear the filecmp cache.
+ Patch by Mark Levitt
+
+- Issue #18193: Add importlib.reload().
+
+- Issue #18157: Stop using imp.load_module() in pydoc.
+
+- Issue #16102: Make uuid._netbios_getnode() work again on Python 3.
+
+- Issue #17134: Add ssl.enum_cert_store() as interface to Windows' cert store.
+
+- Issue #18143: Implement ssl.get_default_verify_paths() in order to debug
+ the default locations for cafile and capath.
+
+- Issue #17314: Move multiprocessing.forking over to importlib.
+
+- Issue #11959: SMTPServer and SMTPChannel now take an optional map, use of
+ which avoids affecting global state.
+
+- Issue #18109: os.uname() now decodes fields from the locale encoding, and
+ socket.gethostname() now decodes the hostname from the locale encoding,
+ instead of using the UTF-8 encoding in strict mode.
+
+- Issue #18089: Implement importlib.abc.InspectLoader.load_module.
+
+- Issue #18088: Introduce importlib.abc.Loader.init_module_attrs for setting
+ module attributes. Leads to the pending deprecation of
+ importlib.util.module_for_loader.
+
+- Issue #17403: urllib.parse.robotparser normalizes the urls before adding to
+ ruleline. This helps in handling certain types invalid urls in a conservative
+ manner. Patch contributed by Mher Movsisyan.
+
+- Issue #18070: Have importlib.util.module_for_loader() set attributes
+ unconditionally in order to properly support reloading.
+
+- Added importlib.util.module_to_load to return a context manager to provide the
+ proper module object to load.
+
+- Issue #18025: Fixed a segfault in io.BufferedIOBase.readinto() when raw
+ stream's read() returns more bytes than requested.
+
+- Issue #18011: As was originally intended, base64.b32decode() now raises a
+ binascii.Error if there are non-b32-alphabet characters present in the input
+ string, instead of a TypeError.
+
+- Issue #18072: Implement importlib.abc.InspectLoader.get_code() and
+ importlib.abc.ExecutionLoader.get_code().
+
+- Issue #8240: Set the SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER flag on SSL
+ sockets.
+
+- Issue #17269: Workaround for socket.getaddrinfo crash on MacOS X
+ with port None or "0" and flags AI_NUMERICSERV.
+
+- Issue #16986: ElementTree now correctly works with string input when the
+ internal XML encoding is not UTF-8 or US-ASCII.
+
+- Issue #17996: socket module now exposes AF_LINK constant on BSD and OSX.
+
+- Issue #17900: Allowed pickling of recursive OrderedDicts. Decreased pickled
+ size and pickling time.
-- Issue #17915: Fix interoperability of xml.sax with file objects returned by
- codecs.open().
+- Issue #17914: Add os.cpu_count(). Patch by Yogesh Chaudhari, based on an
+ initial patch by Trent Nelson.
-Build
------
+- Issue #17812: Fixed quadratic complexity of base64.b32encode().
+ Optimize base64.b32encode() and base64.b32decode() (speed up to 3x).
-- Issue #17547: In configure, explicitly pass -Wformat for the benefit for GCC
- 4.8.
+- Issue #17980: Fix possible abuse of ssl.match_hostname() for denial of
+ service using certificates with many wildcards (CVE-2013-2099).
-- Issue #17962: Build with OpenSSL 1.0.1e on Windows.
+- Issue #15758: Fix FileIO.readall() so it no longer has O(n**2) complexity.
+- Issue #14596: The struct.Struct() objects now use a more compact
+ implementation.
-What's New in Python 3.3.1?
-===========================
+- Issue #17981: logging's SysLogHandler now closes the socket when it catches
+ socket OSErrors.
-*Release date: 07-Apr-2013*
+- Issue #17964: Fix os.sysconf(): the return type of the C sysconf() function
+ is long, not int.
-Build
------
+- Fix typos in the multiprocessing module.
-- Issue #17550: Fix the --enable-profiling configure switch.
+- Issue #17754: Make ctypes.util.find_library() independent of the locale.
-IDLE
--------
+- Issue #17968: Fix memory leak in os.listxattr().
-- Issue #17625: In IDLE, close the replace dialog after it is used.
+- Issue #17606: Fixed support of encoded byte strings in the XMLGenerator
+ characters() and ignorableWhitespace() methods. Original patch by Sebastian
+ Ortiz Vasquez.
+- Issue #17732: Ignore distutils.cfg options pertaining to install paths if a
+ virtual environment is active.
-What's New in Python 3.3.1 release candidate 1?
-===============================================
+- Issue #17915: Fix interoperability of xml.sax with file objects returned by
+ codecs.open().
-*Release date: 24-Mar-2013*
+- Issue #16601: Restarting iteration over tarfile really restarts rather
+ than continuing from where it left off. Patch by Michael Birtwell.
-Core and Builtins
------------------
+- Issue #17289: The readline module now plays nicer with external modules
+ or applications changing the rl_completer_word_break_characters global
+ variable. Initial patch by Bradley Froehle.
-- Issue #17328: Fix possible refleak in dict.setdefault.
+- Issue #12181: select module: Fix struct kevent definition on OpenBSD 64-bit
+ platforms. Patch by Federico Schwindt.
-- Issue #17223: Fix PyUnicode_FromUnicode() for string of 1 character outside
- the range U+0000-U+10ffff.
+- Issue #11816: multiple improvements to the dis module: get_instructions
+ generator, ability to redirect output to a file, Bytecode and Instruction
+ abstractions. Patch by Nick Coghlan, Ryan Kelly and Thomas Kluyver.
-- Issue #1692335: Move initial args assignment to
- BaseException.__new__ to help pickling of naive subclasses.
+- Issue #13831: Embed stringification of remote traceback in local
+ traceback raised when pool task raises an exception.
-- Issue #17275: Corrected class name in init error messages of the C version of
- BufferedWriter and BufferedRandom.
+- Issue #15528: Add weakref.finalize to support finalization using
+ weakref callbacks.
-- Issue #7963: Fixed misleading error message that issued when object is
- called without arguments.
+- Issue #14173: Avoid crashing when reading a signal handler during
+ interpreter shutdown.
-- Issue #5308: Raise ValueError when marshalling too large object (a sequence
- with size >= 2**31), instead of producing illegal marshal data.
+- Issue #15902: Fix imp.load_module() accepting None as a file when loading an
+ extension module.
-- Issue #12983: Bytes literals with invalid \x escape now raise a SyntaxError
- and a full traceback including line number.
+- Issue #13721: SSLSocket.getpeercert() and SSLSocket.do_handshake() now
+ raise an OSError with ENOTCONN, instead of an AttributeError, when the
+ SSLSocket is not connected.
-- Issue #17173: Remove uses of locale-dependent C functions (isalpha() etc.)
- in the interpreter.
+- Issue #14679: add an __all__ (that contains only HTMLParser) to html.parser.
-- Issue #17137: When an Unicode string is resized, the internal wide character
- string (wstr) format is now cleared.
+- Issue #17802: Fix an UnboundLocalError in html.parser. Initial tests by
+ Thomas Barlow.
-- Issue #17043: The unicode-internal decoder no longer read past the end of
- input buffer.
+- Issue #17358: Modules loaded by imp.load_source() and load_compiled() (and by
+ extention load_module()) now have a better chance of working when reloaded.
-- Issue #17098: All modules now have __loader__ set even if they pre-exist the
- bootstrapping of importlib.
+- Issue #17804: New function ``struct.iter_unpack`` allows for streaming
+ struct unpacking.
-- Issue #16979: Fix error handling bugs in the unicode-escape-decode decoder.
+- Issue #17830: When keyword.py is used to update a keyword file, it now
+ preserves the line endings of the original file.
-- Issue #10156: In the interpreter's initialization phase, unicode globals
- are now initialized dynamically as needed.
+- Issue #17272: Making the urllib.request's Request.full_url a descriptor.
+ Fixes bugs with assignment to full_url. Patch by Demian Brecht.
-- Issue #16980: Fix processing of escaped non-ascii bytes in the
- unicode-escape-decode decoder.
+- Issue #17353: Plistlib emitted empty data tags with deeply nested datastructures
-- Issue #16975: Fix error handling bug in the escape-decode bytes decoder.
+- Issue #11714: Use 'with' statements to assure a Semaphore releases a
+ condition variable. Original patch by Thomas Rachel.
-- Issue #14850: Now a charmap decoder treats U+FFFE as "undefined mapping"
- in any mapping, not only in a string.
+- Issue #16624: `subprocess.check_output` now accepts an `input` argument,
+ allowing the subprocess's stdin to be provided as a (byte) string.
+ Patch by Zack Weinberg.
-- Issue #16730: importlib.machinery.FileFinder now no longers raises an
- exception when trying to populate its cache and it finds out the directory is
- unreadable or has turned into a file. Reported and diagnosed by
- David Pritchard.
+- Issue #17795: Reverted backwards-incompatible change in SysLogHandler with
+ Unix domain sockets.
-- Issue #16906: Fix a logic error that prevented most static strings from being
- cleared.
+- Issue #16694: Add a pure Python implementation of the operator module.
+ Patch by Zachary Ware.
-- Issue #11461: Fix the incremental UTF-16 decoder. Original patch by
- Amaury Forgeot d'Arc.
+- Issue #11182: remove the unused and undocumented pydoc.Scanner class.
+ Patch by Martin Morrison.
-- Issue #16856: Fix a segmentation fault from calling repr() on a dict with
- a key whose repr raise an exception.
+- Issue #17741: Add ElementTree.XMLPullParser, an event-driven parser for
+ non-blocking applications.
-- Issue #16367: Fix FileIO.readall() on Windows for files larger than 2 GB.
+- Issue #17555: Fix ForkAwareThreadLock so that size of after fork
+ registry does not grow exponentially with generation of process.
-- Issue #16455: On FreeBSD and Solaris, if the locale is C, the
- ASCII/surrogateescape codec is now used, instead of the locale encoding, to
- decode the command line arguments. This change fixes inconsistencies with
- os.fsencode() and os.fsdecode() because these operating systems announces an
- ASCII locale encoding, whereas the ISO-8859-1 encoding is used in practice.
+- Issue #17707: fix regression in multiprocessing.Queue's get() method where
+ it did not block for short timeouts.
-- Issue #16761: Calling int() with base argument only now raises TypeError.
+- Issue #17720: Fix the Python implementation of pickle.Unpickler to correctly
+ process the APPENDS opcode when it is used on non-list objects.
-- Issue #16759: Support the full DWORD (unsigned long) range in Reg2Py
- when retrieving a REG_DWORD value. This corrects functions like
- winreg.QueryValueEx that may have been returning truncated values.
+- Issue #17012: shutil.which() no longer falls back to the PATH environment
+ variable if an empty path argument is specified. Patch by Serhiy Storchaka.
-- Issue #14420: Support the full DWORD (unsigned long) range in Py2Reg
- when passed a REG_DWORD value. Fixes OverflowError in winreg.SetValueEx.
+- Issue #17710: Fix pickle raising a SystemError on bogus input.
-- Issue #16597: In buffered and text IO, call close() on the underlying stream
- if invoking flush() fails.
+- Issue #17341: Include the invalid name in the error messages from re about
+ invalid group names.
-- Issue #16722: In the bytes() constructor, try to call __bytes__ on the
- argument before __index__.
+- Issue #17702: os.environ now raises KeyError with the original environment
+ variable name (str on UNIX), instead of using the encoded name (bytes on
+ UNIX).
-- Issue #16602: When a weakref's target was part of a long deallocation
- chain, the object could remain reachable through its weakref even though
- its refcount had dropped to zero.
+- Issue #16163: Make the importlib based version of pkgutil.iter_importers
+ work for submodules. Initial patch by Berker Peksag.
-- Issue #16416: On Mac OS X, operating system data are now always
- encoded/decoded to/from UTF-8/surrogateescape, instead of the locale encoding
- (which may be ASCII if no locale environment variable is set), to avoid
- inconsistencies with os.fsencode() and os.fsdecode() functions which are
- already using UTF-8/surrogateescape.
+- Issue #16804: Fix a bug in the 'site' module that caused running
+ 'python -S -m site' to incorrectly throw an exception.
-- Issue #16588: Silence unused-but-set warnings in Python/thread_pthread
+- Issue #15480: Remove the deprecated and unused TYPE_INT64 code from marshal.
+ Initial patch by Daniel Riti.
-- Issue #16546: Fix: ast.YieldFrom argument is now mandatory.
+- Issue #2118: SMTPException is now a subclass of OSError.
-- Issue #16514: Fix regression causing a traceback when sys.path[0] is None
- (actually, any non-string or non-bytes type).
+- Issue #17016: Get rid of possible pointer wraparounds and integer overflows
+ in the re module. Patch by Nickolai Zeldovich.
-- Issue #16306: Fix multiple error messages when unknown command line
- parameters where passed to the interpreter. Patch by Hieu Nguyen.
+- Issue #16658: add missing return to HTTPConnection.send().
+ Patch by Jeff Knupp.
-- Issue #16215: Fix potential double memory free in str.replace(). Patch
- by Serhiy Storchaka.
+- Issue #9556: the logging package now allows specifying a time-of-day for a
+ TimedRotatingFileHandler to rotate.
-- Issue #16453: Fix equality testing of dead weakref objects.
+- Issue #14971: unittest test discovery no longer gets confused when a function
+ has a different __name__ than its name in the TestCase class dictionary.
-- Issue #9535: Fix pending signals that have been received but not yet
- handled by Python to not persist after os.fork() in the child process.
+- Issue #17487: The wave getparams method now returns a namedtuple rather than
+ a plain tuple.
-- Issue #15001: fix segfault on "del sys.modules['__main__']". Patch by Victor
- Stinner.
+- Issue #17675: socket repr() provides local and remote addresses (if any).
+ Patch by Giampaolo Rodola'
-- Issue #8271: the utf-8 decoder now outputs the correct number of U+FFFD
- characters when used with the 'replace' error handler on invalid utf-8
- sequences. Patch by Serhiy Storchaka, tests by Ezio Melotti.
+- Issue #17093: Make the ABCs in importlib.abc provide default values or raise
+ reasonable exceptions for their methods to make them more amenable to super()
+ calls.
-- Issue #5765: Apply a hard recursion limit in the compiler instead of
- blowing the stack and segfaulting. Initial patch by Andrea Griffini.
+- Issue #17566: Make importlib.abc.Loader.module_repr() optional instead of an
+ abstractmethod; now it raises NotImplementedError so as to be ignored by default.
-- Issue #16402: When slicing a range, fix shadowing of exceptions from
- __index__.
+- Issue #17678: Remove the use of deprecated method in http/cookiejar.py by
+ changing the call to get_origin_req_host() to origin_req_host.
-- Issue #16336: fix input checking in the surrogatepass error handler.
- Patch by Serhiy Storchaka.
+- Issue #17666: Fix reading gzip files with an extra field.
-- Issue #8401: assigning an int to a bytearray slice (e.g. b[3:4] = 5) now
- raises an error.
+- Issue #16475: Support object instancing, recursion and interned strings
+ in marshal
-- Fix segfaults on setting __qualname__ on builtin types and attempting to
- delete it on any type.
+- Issue #17502: Process DEFAULT values in mock side_effect that returns iterator.
-- Issue #16345: Fix an infinite loop when ``fromkeys`` on a dict subclass
- received a nonempty dict from the constructor.
+- Issue #16795: On the ast.arguments object, unify vararg with varargannotation
+ and kwarg and kwargannotation. Change the column offset of ast.Attribute to be
+ at the attribute name.
-- Issue #16271: Fix strange bugs that resulted from __qualname__ appearing in a
- class's __dict__ and on type.
+- Issue #17434: Properly raise a SyntaxError when a string occurs between future
+ imports.
-- Issue #6074: Ensure cached bytecode files can always be updated by the
- user that created them, even when the source file is read-only.
+- Issue #17117: Import and @importlib.util.set_loader now set __loader__ when
+ it has a value of None or the attribute doesn't exist.
-- Issue #14783: Improve int() docstring and switch docstrings for str(),
- range(), and slice() to use multi-line signatures.
+- Issue #17032: The "global" in the "NameError: global name 'x' is not defined"
+ error message has been removed. Patch by Ram Rachum.
-- Issue #16160: Subclass support now works for types.SimpleNamespace.
+- Issue #18080: When building a C extension module on OS X, if the compiler
+ is overriden with the CC environment variable, use the new compiler as
+ the default for linking if LDSHARED is not also overriden. This restores
+ Distutils behavior introduced in 3.2.3 and inadvertently dropped in 3.3.0.
-- Issue #15379: Fix passing of non-BMP characters as integers for the charmap
- decoder (already working as unicode strings). Patch by Serhiy Storchaka.
+- Issue #18113: Fixed a refcount leak in the curses.panel module's
+ set_userptr() method. Reported by Atsuo Ishimoto.
-- Issue #15144: Fix possible integer overflow when handling pointers as integer
- values, by using `Py_uintptr_t` instead of `size_t`. Patch by Serhiy
- Storchaka.
+- Implement PEP 443 "Single-dispatch generic functions".
-- Issue #15965: Explicitly cast `AT_FDCWD` as (int). Required on Solaris 10
- (which defines `AT_FDCWD` as ``0xffd19553``), harmless on other platforms.
+- Implement PEP 435 "Adding an Enum type to the Python standard library".
-- Issue #15839: Convert SystemErrors in `super()` to RuntimeErrors.
+- Issue #15596: Faster pickling of unicode strings.
-- Issue #15846: Fix SystemError which happened when using `ast.parse()` in an
- exception handler on code with syntax errors.
+- Issue #17572: Avoid chained exceptions when passing bad directives to
+ time.strptime(). Initial patch by Claudiu Popa.
-- Issue #15801: Make sure mappings passed to '%' formatting are actually
- subscriptable.
+- Issue #17435: threading.Timer's __init__ method no longer uses mutable
+ default values for the args and kwargs parameters.
-- Issue #15111: __import__ should let ImportError propagate when a module that
- is imported as a side-effect of using fromlist tries to import a module
- that cannot be found.
+- Issue #17526: fix an IndexError raised while passing code without filename to
+ inspect.findsource(). Initial patch by Tyler Doyle.
-Library
--------
+- Issue #17540: Added style parameter to logging formatter configuration by dict.
-- Issue #17540: Added style to formatter configuration by dict.
+- Issue #16692: The ssl module now supports TLS 1.1 and TLS 1.2. Initial
+ patch by Michele Orrù.
+
+- Issue #17025: multiprocessing: Reduce Queue and SimpleQueue contention.
- Issue #17536: Add to webbrowser's browser list: www-browser, x-www-browser,
iceweasel, iceape.
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