- Issue #28512: Fixed setting the offset attribute of SyntaxError by
PyErr_SyntaxLocationEx() and PyErr_SyntaxLocationObject().
-- Issue #28991: functools.lru_cache() was susceptible to an obscure reentrancy
- bug caused by a monkey-patched len() function.
+- Issue #28918: Fix the cross compilation of xxlimited when Python has been
+ built with Py_DEBUG defined.
-- Issue #28648: Fixed crash in Py_DecodeLocale() in debug build on Mac OS X
- when decode astral characters. Patch by Xiang Zhang.
+- Issue #28731: Optimize _PyDict_NewPresized() to create correct size dict.
+ Improve speed of dict literal with constant keys up to 30%.
-- Issue #19398: Extra slash no longer added to sys.path components in case of
- empty compile-time PYTHONPATH components.
+Library
+-------
-- Issue #28426: Fixed potential crash in PyUnicode_AsDecodedObject() in debug
- build.
++- Issue #28427: old keys should not remove new values from
++ WeakValueDictionary when collecting from another thread.
+
-- Issue #23782: Fixed possible memory leak in _PyTraceback_Add() and exception
- loss in PyTraceBack_Here().
+- Issue 28923: Remove editor artifacts from Tix.py.
-- Issue #28379: Added sanity checks and tests for PyUnicode_CopyCharacters().
- Patch by Xiang Zhang.
+- Issue #29055: Neaten-up empty population error on random.choice()
+ by suppressing the upstream exception.
-- Issue #28376: The type of long range iterator is now registered as Iterator.
- Patch by Oren Milman.
+- Issue #28871: Fixed a crash when deallocate deep ElementTree.
-- Issue #28376: The constructor of range_iterator now checks that step is not 0.
- Patch by Oren Milman.
+- Issue #19542: Fix bugs in WeakValueDictionary.setdefault() and
+ WeakValueDictionary.pop() when a GC collection happens in another
+ thread.
-- Issue #26906: Resolving special methods of uninitialized type now causes
- implicit initialization of the type instead of a fail.
+- Issue #20191: Fixed a crash in resource.prlimit() when pass a sequence that
+ doesn't own its elements as limits.
-- Issue #18287: PyType_Ready() now checks that tp_name is not NULL.
- Original patch by Niklas Koep.
+- Issue #28779: multiprocessing.set_forkserver_preload() would crash the
+ forkserver process if a preloaded module instantiated some
+ multiprocessing objects such as locks.
-- Issue #24098: Fixed possible crash when AST is changed in process of
- compiling it.
+- Issue #28847: dbm.dumb now supports reading read-only files and no longer
+ writes the index file when it is not changed.
-- Issue #28350: String constants with null character no longer interned.
+- Issue #26937: The chown() method of the tarfile.TarFile class does not fail
+ now when the grp module cannot be imported, as for example on Android
+ platforms.
-- Issue #26617: Fix crash when GC runs during weakref callbacks.
+Windows
+-------
-- Issue #27942: String constants now interned recursively in tuples and frozensets.
+- Issue #25778: winreg does not truncate string correctly (Patch by Eryk Sun)
-- Issue #21578: Fixed misleading error message when ImportError called with
- invalid keyword args.
+- Issue #28896: Deprecate WindowsRegistryFinder and disable it by default.
-- Issue #28203: Fix incorrect type in error message from
- ``complex(1.0, {2:3})``. Patch by Soumya Sharma.
+C API
+-----
-- Issue #27955: Fallback on reading /dev/urandom device when the getrandom()
- syscall fails with EPERM, for example when blocked by SECCOMP.
+- Issue #29058: All stable API extensions added after Python 3.2 are now
+ available only when Py_LIMITED_API is set to the PY_VERSION_HEX value of
+ the minimum Python version supporting this API.
-- Issue #28131: Fix a regression in zipimport's compile_source(). zipimport
- should use the same optimization level as the interpreter.
+Tests
+-----
-- Issue #25221: Fix corrupted result from PyLong_FromLong(0) when
- Python is compiled with NSMALLPOSINTS = 0.
+- Issue #28950: Disallow -j0 to be combined with -T/-l in regrtest
+ command line arguments.
-- Issue #25758: Prevents zipimport from unnecessarily encoding a filename
- (patch by Eryk Sun)
+- Issue #28683: Fix the tests that bind() a unix socket and raise
+ PermissionError on Android for a non-root user.
-- Issue #28189: dictitems_contains no longer swallows compare errors.
- (Patch by Xiang Zhang)
+- Issue #26939: Add the support.setswitchinterval() function to fix
+ test_functools hanging on the Android armv7 qemu emulator.
-- Issue #27812: Properly clear out a generator's frame's backreference to the
- generator to prevent crashes in frame.clear().
+Build
+-----
-- Issue #27811: Fix a crash when a coroutine that has not been awaited is
- finalized with warnings-as-errors enabled.
+- Issue #23903: Added missed names to PC/python3.def.
-- Issue #27587: Fix another issue found by PVS-Studio: Null pointer check
- after use of 'def' in _PyState_AddModule().
- Initial patch by Christian Heimes.
+- Issue #28762: lockf() is available on Android API level 24, but the F_LOCK
+ macro is not defined in android-ndk-r13.
-- Issue #26020: set literal evaluation order did not match documented behaviour.
+- Issue #28538: Fix the compilation error that occurs because if_nameindex() is
+ available on Android API level 24, but the if_nameindex structure is not
+ defined.
-- Issue #27782: Multi-phase extension module import now correctly allows the
- ``m_methods`` field to be used to add module level functions to instances
- of non-module types returned from ``Py_create_mod``. Patch by Xiang Zhang.
+- Issue #20211: Do not add the directory for installing C header files and the
+ directory for installing object code libraries to the cross compilation
+ search paths. Original patch by Thomas Petazzoni.
-- Issue #27936: The round() function accepted a second None argument
- for some types but not for others. Fixed the inconsistency by
- accepting None for all numeric types.
+- Issue #28849: Do not define sys.implementation._multiarch on Android.
-- Issue #27487: Warn if a submodule argument to "python -m" or
- runpy.run_module() is found in sys.modules after parent packages are
- imported, but before the submodule is executed.
-- Issue #27558: Fix a SystemError in the implementation of "raise" statement.
- In a brand new thread, raise a RuntimeError since there is no active
- exception to reraise. Patch written by Xiang Zhang.
+What's New in Python 3.6.0?
+===========================
-- Issue #27419: Standard __import__() no longer look up "__import__" in globals
- or builtins for importing submodules or "from import". Fixed handling an
- error of non-string package name.
+*Release date: 2016-12-23*
-- Issue #27083: Respect the PYTHONCASEOK environment variable under Windows.
+- No changes since release candidate 2
-- Issue #27514: Make having too many statically nested blocks a SyntaxError
- instead of SystemError.
-- Issue #27473: Fixed possible integer overflow in bytes and bytearray
- concatenations. Patch by Xiang Zhang.
+What's New in Python 3.6.0 release candidate 2?
+===============================================
-- Issue #27507: Add integer overflow check in bytearray.extend(). Patch by
- Xiang Zhang.
+*Release date: 2016-12-16*
-- Issue #27581: Don't rely on wrapping for overflow check in
- PySequence_Tuple(). Patch by Xiang Zhang.
+Core and Builtins
+-----------------
-- Issue #27443: __length_hint__() of bytearray iterators no longer return a
- negative integer for a resized bytearray.
+- Issue #28147: Fix a memory leak in split-table dictionaries: setattr()
+ must not convert combined table into split table. Patch written by INADA
+ Naoki.
-- Issue #27942: Fix memory leak in codeobject.c
+- Issue #28990: Fix asyncio SSL hanging if connection is closed before
+ handshake is completed. (Patch by HoHo-Ho)
-Library
--------
+Tools/Demos
+-----------
-- Issue #28427: old keys should not remove new values from
- WeakValueDictionary when collecting from another thread.
+- Issue #28770: Fix python-gdb.py for fastcalls.
-- Issue 28923: Remove editor artifacts from Tix.py.
+Windows
+-------
-- Issue #28871: Fixed a crash when deallocate deep ElementTree.
+- Issue #28896: Deprecate WindowsRegistryFinder.
-- Issue #19542: Fix bugs in WeakValueDictionary.setdefault() and
- WeakValueDictionary.pop() when a GC collection happens in another
- thread.
+Build
+-----
-- Issue #20191: Fixed a crash in resource.prlimit() when pass a sequence that
- doesn't own its elements as limits.
+- Issue #28898: Prevent gdb build errors due to HAVE_LONG_LONG redefinition.
-- Issue #28779: multiprocessing.set_forkserver_preload() would crash the
- forkserver process if a preloaded module instantiated some
- multiprocessing objects such as locks.
-- Issue #28847: dbm.dumb now supports reading read-only files and no longer
- writes the index file when it is not changed.
+What's New in Python 3.6.0 release candidate 1?
+===============================================
-- Issue #25659: In ctypes, prevent a crash calling the from_buffer() and
- from_buffer_copy() methods on abstract classes like Array.
+*Release date: 2016-12-06*
-- Issue #28732: Fix crash in os.spawnv() with no elements in args
+Core and Builtins
+-----------------
-- Issue #28485: Always raise ValueError for negative
- compileall.compile_dir(workers=...) parameter, even when multithreading is
- unavailable.
+- Issue #23722: Rather than silently producing a class that doesn't support
+ zero-argument ``super()`` in methods, failing to pass the new
+ ``__classcell__`` namespace entry up to ``type.__new__`` now results in a
+ ``DeprecationWarning`` and a class that supports zero-argument ``super()``.
-- Issue #28387: Fixed possible crash in _io.TextIOWrapper deallocator when
- the garbage collector is invoked in other thread. Based on patch by
- Sebastian Cufre.
+- Issue #28797: Modifying the class __dict__ inside the __set_name__ method of
+ a descriptor that is used inside that class no longer prevents calling the
+ __set_name__ method of other descriptors.
-- Issue #27517: LZMA compressor and decompressor no longer raise exceptions if
- given empty data twice. Patch by Benjamin Fogle.
+- Issue #28782: Fix a bug in the implementation ``yield from`` when checking
+ if the next instruction is YIELD_FROM. Regression introduced by WORDCODE
+ (issue #26647).
-- Issue #28549: Fixed segfault in curses's addch() with ncurses6.
+Library
+-------
-- Issue #28449: tarfile.open() with mode "r" or "r:" now tries to open a tar
- file with compression before trying to open it without compression. Otherwise
- it had 50% chance failed with ignore_zeros=True.
+- Issue #27030: Unknown escapes in re.sub() replacement template are allowed
+ again. But they still are deprecated and will be disabled in 3.7.
-- Issue #23262: The webbrowser module now supports Firefox 36+ and derived
- browsers. Based on patch by Oleg Broytman.
+- Issue #28835: Fix a regression introduced in warnings.catch_warnings():
+ call warnings.showwarning() if it was overriden inside the context manager.
-- Issue #27939: Fixed bugs in tkinter.ttk.LabeledScale and tkinter.Scale caused
- by representing the scale as float value internally in Tk. tkinter.IntVar
- now works if float value is set to underlying Tk variable.
+- Issue #27172: To assist with upgrades from 2.7, the previously documented
+ deprecation of ``inspect.getfullargspec()`` has been reversed. This decision
+ may be revisited again after the Python 2.7 branch is no longer officially
+ supported.
-- Issue #28255: calendar.TextCalendar().prmonth() no longer prints a space
- at the start of new line after printing a month's calendar. Patch by
- Xiang Zhang.
+- Issue #24142: Reading a corrupt config file left configparser in an
+ invalid state. Original patch by Florian Höch.
-- Issue #20491: The textwrap.TextWrapper class now honors non-breaking spaces.
- Based on patch by Kaarle Ritvanen.
+- Issue #28843: Fix asyncio C Task to handle exceptions __traceback__.
-- Issue #28353: os.fwalk() no longer fails on broken links.
+C API
+-----
-- Issue #25464: Fixed HList.header_exists() in tkinter.tix module by addin
- a workaround to Tix library bug.
+- Issue #28808: PyUnicode_CompareWithASCIIString() now never raises exceptions.
-- Issue #28488: shutil.make_archive() no longer add entry "./" to ZIP archive.
+Documentation
+-------------
-- Issue #24452: Make webbrowser support Chrome on Mac OS X.
+- Issue #23722: The data model reference and the porting section in the What's
+ New guide now cover the additional ``__classcell__`` handling needed for
+ custom metaclasses to fully support PEP 487 and zero-argument ``super()``.
-- Issue #20766: Fix references leaked by pdb in the handling of SIGINT
- handlers.
+Tools/Demos
+-----------
-- Issue #26293: Fixed writing ZIP files that starts not from the start of the
- file. Offsets in ZIP file now are relative to the start of the archive in
- conforming to the specification.
+- Issue #28023: Fix python-gdb.py didn't support new dict implementation.
-- Issue #28321: Fixed writing non-BMP characters with binary format in plistlib.
-- Issue #28322: Fixed possible crashes when unpickle itertools objects from
- incorrect pickle data. Based on patch by John Leitch.
+What's New in Python 3.6.0 beta 4?
+==================================
-- Fix possible integer overflows and crashes in the mmap module with unusual
- usage patterns.
+*Release date: 2016-11-21*
-- Issue #1703178: Fix the ability to pass the --link-objects option to the
- distutils build_ext command.
+Core and Builtins
+-----------------
-- Issue #28253: Fixed calendar functions for extreme months: 0001-01
- and 9999-12.
+- Issue #28532: Show sys.version when -V option is supplied twice.
- Methods itermonthdays() and itermonthdays2() are reimplemented so
- that they don't call itermonthdates() which can cause datetime.date
- under/overflow.
+- Issue #27100: The with-statement now checks for __enter__ before it
+ checks for __exit__. This gives less confusing error messages when
+ both methods are missing. Patch by Jonathan Ellington.
-- Issue #28275: Fixed possible use after free in the decompress()
- methods of the LZMADecompressor and BZ2Decompressor classes.
- Original patch by John Leitch.
+- Issue #28746: Fix the set_inheritable() file descriptor method on platforms
+ that do not have the ioctl FIOCLEX and FIONCLEX commands.
-- Issue #27897: Fixed possible crash in sqlite3.Connection.create_collation()
- if pass invalid string-like object as a name. Patch by Xiang Zhang.
+- Issue #26920: Fix not getting the locale's charset upon initializing the
+ interpreter, on platforms that do not have langinfo.
-- Issue #18893: Fix invalid exception handling in Lib/ctypes/macholib/dyld.py.
- Patch by Madison May.
+- Issue #28648: Fixed crash in Py_DecodeLocale() in debug build on Mac OS X
+ when decode astral characters. Patch by Xiang Zhang.
-- Issue #27611: Fixed support of default root window in the tkinter.tix module.
+- Issue #19398: Extra slash no longer added to sys.path components in case of
+ empty compile-time PYTHONPATH components.
-- Issue #27348: In the traceback module, restore the formatting of exception
- messages like "Exception: None". This fixes a regression introduced in
- 3.5a2.
+- Issue #28665: Improve speed of the STORE_DEREF opcode by 40%.
-- Issue #25651: Allow falsy values to be used for msg parameter of subTest().
+- Issue #28583: PyDict_SetDefault didn't combine split table when needed.
+ Patch by Xiang Zhang.
-- Issue #27932: Prevent memory leak in win32_ver().
+- Issue #27243: Change PendingDeprecationWarning -> DeprecationWarning.
+ As it was agreed in the issue, __aiter__ returning an awaitable
+ should result in PendingDeprecationWarning in 3.5 and in
+ DeprecationWarning in 3.6.
-- Fix UnboundLocalError in socket._sendfile_use_sendfile.
+- Issue #26182: Fix a refleak in code that raises DeprecationWarning.
-- Issue #28075: Check for ERROR_ACCESS_DENIED in Windows implementation of
- os.stat(). Patch by Eryk Sun.
+- Issue #28721: Fix asynchronous generators aclose() and athrow() to
+ handle StopAsyncIteration propagation properly.
-- Issue #25270: Prevent codecs.escape_encode() from raising SystemError when
- an empty bytestring is passed.
+Library
+-------
-- Issue #28181: Get antigravity over HTTPS. Patch by Kaartic Sivaraam.
+- Issue #26273: Add new :data:`socket.TCP_CONGESTION` (Linux 2.6.13) and
+ :data:`socket.TCP_USER_TIMEOUT` (Linux 2.6.37) constants. Patch written by
+ Omar Sandoval.
-- Issue #25895: Enable WebSocket URL schemes in urllib.parse.urljoin.
- Patch by Gergely Imreh and Markus Holtermann.
+- Issue #28752: Restored the __reduce__() methods of datetime objects.
-- Issue #27599: Fixed buffer overrun in binascii.b2a_qp() and binascii.a2b_qp().
+- Issue #28727: Regular expression patterns, _sre.SRE_Pattern objects created
+ by re.compile(), become comparable (only x==y and x!=y operators). This
+ change should fix the issue #18383: don't duplicate warning filters when the
+ warnings module is reloaded (thing usually only done in unit tests).
-- Issue #19003:m email.generator now replaces only \r and/or \n line
- endings, per the RFC, instead of all unicode line endings.
+- Issue #20572: The subprocess.Popen.wait method's undocumented
+ endtime parameter now raises a DeprecationWarning.
-- Issue #28019: itertools.count() no longer rounds non-integer step in range
- between 1.0 and 2.0 to 1.
+- Issue #25659: In ctypes, prevent a crash calling the from_buffer() and
+ from_buffer_copy() methods on abstract classes like Array.
-- Issue #25969: Update the lib2to3 grammar to handle the unpacking
- generalizations added in 3.5.
+- Issue #19717: Makes Path.resolve() succeed on paths that do not exist.
+ Patch by Vajrasky Kok
-- Issue #14977: mailcap now respects the order of the lines in the mailcap
- files ("first match"), as required by RFC 1542. Patch by Michael Lazar.
+- Issue #28563: Fixed possible DoS and arbitrary code execution when handle
+ plural form selections in the gettext module. The expression parser now
+ supports exact syntax supported by GNU gettext.
-- Issue #24594: Validates persist parameter when opening MSI database
+- Issue #28387: Fixed possible crash in _io.TextIOWrapper deallocator when
+ the garbage collector is invoked in other thread. Based on patch by
+ Sebastian Cufre.
-- Issue #17582: xml.etree.ElementTree nows preserves whitespaces in attributes
- (Patch by Duane Griffin. Reviewed and approved by Stefan Behnel.)
+- Issue #28600: Optimize loop.call_soon.
-- Issue #28047: Fixed calculation of line length used for the base64 CTE
- in the new email policies.
+- Issue #28613: Fix get_event_loop() return the current loop if
+ called from coroutines/callbacks.
-- Issue #27445: Don't pass str(_charset) to MIMEText.set_payload().
- Patch by Claude Paroz.
+- Issue #28634: Fix asyncio.isfuture() to support unittest.Mock.
-- Issue #22450: urllib now includes an "Accept: */*" header among the
- default headers. This makes the results of REST API requests more
- consistent and predictable especially when proxy servers are involved.
+- Issue #26081: Fix refleak in _asyncio.Future.__iter__().throw.
-- lib2to3.pgen3.driver.load_grammar() now creates a stable cache file
- between runs given the same Grammar.txt input regardless of the hash
- randomization setting.
+- Issue #28639: Fix inspect.isawaitable to always return bool
+ Patch by Justin Mayfield.
-- Issue #27570: Avoid zero-length memcpy() etc calls with null source
- pointers in the "ctypes" and "array" modules.
+- Issue #28652: Make loop methods reject socket kinds they do not support.
-- Issue #22233: Break email header lines *only* on the RFC specified CR and LF
- characters, not on arbitrary unicode line breaks. This also fixes a bug in
- HTTP header parsing.
+- Issue #28653: Fix a refleak in functools.lru_cache.
-- Issue 27988: Fix email iter_attachments incorrect mutation of payload list.
+- Issue #28703: Fix asyncio.iscoroutinefunction to handle Mock objects.
-- Issue #27691: Fix ssl module's parsing of GEN_RID subject alternative name
- fields in X.509 certs.
+- Issue #28704: Fix create_unix_server to support Path-like objects
+ (PEP 519).
-- Issue #27850: Remove 3DES from ssl module's default cipher list to counter
- measure sweet32 attack (CVE-2016-2183).
+- Issue #28720: Add collections.abc.AsyncGenerator.
-- Issue #27766: Add ChaCha20 Poly1305 to ssl module's default ciper list.
- (Required OpenSSL 1.1.0 or LibreSSL).
+Documentation
+-------------
-- Issue #26470: Port ssl and hashlib module to OpenSSL 1.1.0.
+- Issue #28513: Documented command-line interface of zipfile.
-- Remove support for passing a file descriptor to os.access. It never worked but
- previously didn't raise.
+Tests
+-----
-- Issue #12885: Fix error when distutils encounters symlink.
+- Issue #28666: Now test.support.rmtree is able to remove unwritable or
+ unreadable directories.
-- Issue #27881: Fixed possible bugs when setting sqlite3.Connection.isolation_level.
- Based on patch by Xiang Zhang.
+- Issue #23839: Various caches now are cleared before running every test file.
-- Issue #27861: Fixed a crash in sqlite3.Connection.cursor() when a factory
- creates not a cursor. Patch by Xiang Zhang.
+Build
+-----
-- Issue #19884: Avoid spurious output on OS X with Gnu Readline.
+- Issue #10656: Fix out-of-tree building on AIX. Patch by Tristan Carel and
+ Michael Haubenwallner.
-- Issue #27706: Restore deterministic behavior of random.Random().seed()
- for string seeds using seeding version 1. Allows sequences of calls
- to random() to exactly match those obtained in Python 2.
- Patch by Nofar Schnider.
+- Issue #26359: Rename --with-optimiations to --enable-optimizations.
-- Issue #10513: Fix a regression in Connection.commit(). Statements should
- not be reset after a commit.
+- Issue #28676: Prevent missing 'getentropy' declaration warning on macOS.
+ Patch by Gareth Rees.
-- A new version of typing.py from https://github.com/python/typing:
- - Collection (only for 3.6) (Issue #27598)
- - Add FrozenSet to __all__ (upstream #261)
- - fix crash in _get_type_vars() (upstream #259)
- - Remove the dict constraint in ForwardRef._eval_type (upstream #252)
-- Issue #27539: Fix unnormalised ``Fraction.__pow__`` result in the case
- of negative exponent and negative base.
+What's New in Python 3.6.0 beta 3?
+==================================
-- Issue #21718: cursor.description is now available for queries using CTEs.
+*Release date: 2016-10-31*
-- Issue #2466: posixpath.ismount now correctly recognizes mount points which
- the user does not have permission to access.
+Core and Builtins
+-----------------
-- Issue #27773: Correct some memory management errors server_hostname in
- _ssl.wrap_socket().
+- Issue #28128: Deprecation warning for invalid str and byte escape
+ sequences now prints better information about where the error
+ occurs. Patch by Serhiy Storchaka and Eric Smith.
-- Issue #26750: unittest.mock.create_autospec() now works properly for
- subclasses of property() and other data descriptors.
+- Issue #28509: dict.update() no longer allocate unnecessary large memory.
-- In the curses module, raise an error if window.getstr() or window.instr() is
- passed a negative value.
+- Issue #28426: Fixed potential crash in PyUnicode_AsDecodedObject() in debug
+ build.
-- Issue #27783: Fix possible usage of uninitialized memory in
- operator.methodcaller.
+- Issue #28517: Fixed of-by-one error in the peephole optimizer that caused
+ keeping unreachable code.
-- Issue #27774: Fix possible Py_DECREF on unowned object in _sre.
+- Issue #28214: Improved exception reporting for problematic __set_name__
+ attributes.
-- Issue #27760: Fix possible integer overflow in binascii.b2a_qp.
+- Issue #23782: Fixed possible memory leak in _PyTraceback_Add() and exception
+ loss in PyTraceBack_Here().
-- Issue #27758: Fix possible integer overflow in the _csv module for large
- record lengths.
+- Issue #28471: Fix "Python memory allocator called without holding the GIL"
+ crash in socket.setblocking.
-- Issue #27568: Prevent HTTPoxy attack (CVE-2016-1000110). Ignore the
- HTTP_PROXY variable when REQUEST_METHOD environment is set, which indicates
- that the script is in CGI mode.
+Library
+-------
-- Issue #27656: Do not assume sched.h defines any SCHED_* constants.
+- Issue #27517: LZMA compressor and decompressor no longer raise exceptions if
+ given empty data twice. Patch by Benjamin Fogle.
-- Issue #27130: In the "zlib" module, fix handling of large buffers
- (typically 4 GiB) when compressing and decompressing. Previously, inputs
- were limited to 4 GiB, and compression and decompression operations did not
- properly handle results of 4 GiB.
+- Issue #28549: Fixed segfault in curses's addch() with ncurses6.
-- Issue #27533: Release GIL in nt._isdir
+- Issue #28449: tarfile.open() with mode "r" or "r:" now tries to open a tar
+ file with compression before trying to open it without compression. Otherwise
+ it had 50% chance failed with ignore_zeros=True.
-- Issue #17711: Fixed unpickling by the persistent ID with protocol 0.
- Original patch by Alexandre Vassalotti.
+- Issue #23262: The webbrowser module now supports Firefox 36+ and derived
+ browsers. Based on patch by Oleg Broytman.
-- Issue #27522: Avoid an unintentional reference cycle in email.feedparser.
+- Issue #27939: Fixed bugs in tkinter.ttk.LabeledScale and tkinter.Scale caused
+ by representing the scale as float value internally in Tk. tkinter.IntVar
+ now works if float value is set to underlying Tk variable.
-- Issue #26844: Fix error message for imp.find_module() to refer to 'path'
- instead of 'name'. Patch by Lev Maximov.
+- Issue #18844: The various ways of specifying weights for random.choices()
+ now produce the same result sequences.
-- Issue #23804: Fix SSL zero-length recv() calls to not block and not raise
- an error about unclean EOF.
+- Issue #28255: calendar.TextCalendar().prmonth() no longer prints a space
+ at the start of new line after printing a month's calendar. Patch by
+ Xiang Zhang.
-- Issue #27466: Change time format returned by http.cookie.time2netscape,
- confirming the netscape cookie format and making it consistent with
- documentation.
+- Issue #20491: The textwrap.TextWrapper class now honors non-breaking spaces.
+ Based on patch by Kaarle Ritvanen.
-- Issue #26664: Fix activate.fish by removing mis-use of ``$``.
+- Issue #28353: os.fwalk() no longer fails on broken links.
-- Issue #22115: Fixed tracing Tkinter variables: trace_vdelete() with wrong
- mode no longer break tracing, trace_vinfo() now always returns a list of
- pairs of strings, tracing in the "u" mode now works.
+- Issue #28430: Fix iterator of C implemented asyncio.Future doesn't accept
+ non-None value is passed to it.send(val).
-- Fix a scoping issue in importlib.util.LazyLoader which triggered an
- UnboundLocalError when lazy-loading a module that was already put into
- sys.modules.
+- Issue #27025: Generated names for Tkinter widgets now start by the "!" prefix
+ for readability (was "`").
-- Issue #27079: Fixed curses.ascii functions isblank(), iscntrl() and ispunct().
+- Issue #25464: Fixed HList.header_exists() in tkinter.tix module by addin
+ a workaround to Tix library bug.
-- Issue #26754: Some functions (compile() etc) accepted a filename argument
- encoded as an iterable of integers. Now only strings and byte-like objects
- are accepted.
+- Issue #28488: shutil.make_archive() no longer adds entry "./" to ZIP archive.
-- Issue #27048: Prevents distutils failing on Windows when environment
- variables contain non-ASCII characters
+- Issue #25953: re.sub() now raises an error for invalid numerical group
+ reference in replacement template even if the pattern is not found in
+ the string. Error message for invalid group reference now includes the
+ group index and the position of the reference.
+ Based on patch by SilentGhost.
-- Issue #27330: Fixed possible leaks in the ctypes module.
+- Issue #18219: Optimize csv.DictWriter for large number of columns.
+ Patch by Mariatta Wijaya.
-- Issue #27238: Got rid of bare excepts in the turtle module. Original patch
- by Jelle Zijlstra.
+- Issue #28448: Fix C implemented asyncio.Future didn't work on Windows.
-- Issue #27122: When an exception is raised within the context being managed
- by a contextlib.ExitStack() and one of the exit stack generators
- catches and raises it in a chain, do not re-raise the original exception
- when exiting, let the new chained one through. This avoids the PEP 479
- bug described in issue25782.
+- Issue #28480: Fix error building socket module when multithreading is
+ disabled.
-- [Security] Issue #27278: Fix os.urandom() implementation using getrandom() on
- Linux. Truncate size to INT_MAX and loop until we collected enough random
- bytes, instead of casting a directly Py_ssize_t to int.
+- Issue #24452: Make webbrowser support Chrome on Mac OS X.
-- Issue #26386: Fixed ttk.TreeView selection operations with item id's
- containing spaces.
+- Issue #20766: Fix references leaked by pdb in the handling of SIGINT
+ handlers.
-- [Security] Issue #22636: Avoid shell injection problems with
- ctypes.util.find_library().
+- Issue #28492: Fix how StopIteration exception is raised in _asyncio.Future.
-- Issue #16182: Fix various functions in the "readline" module to use the
- locale encoding, and fix get_begidx() and get_endidx() to return code point
- indexes.
+- Issue #28500: Fix asyncio to handle async gens GC from another thread.
-- Issue #27392: Add loop.connect_accepted_socket().
- Patch by Jim Fulton.
+- Issue #26923: Fix asyncio.Gather to refuse being cancelled once all
+ children are done.
+ Patch by Johannes Ebke.
-- Issue #27930: Improved behaviour of logging.handlers.QueueListener.
- Thanks to Paulo Andrade and Petr Viktorin for the analysis and patch.
+- Issue #26796: Don't configure the number of workers for default
+ threadpool executor.
+ Initial patch by Hans Lawrenz.
-- Issue #21201: Improves readability of multiprocessing error message. Thanks
- to Wojciech Walczak for patch.
+- Issue #28544: Implement asyncio.Task in C.
-- Issue #27456: asyncio: Set TCP_NODELAY by default.
+Windows
+-------
-- Issue #27906: Fix socket accept exhaustion during high TCP traffic.
- Patch by Kevin Conway.
+- Issue #28522: Fixes mishandled buffer reallocation in getpathp.c
-- Issue #28174: Handle when SO_REUSEPORT isn't properly supported.
- Patch by Seth Michael Larson.
+Build
+-----
-- Issue #26654: Inspect functools.partial in asyncio.Handle.__repr__.
- Patch by iceboy.
+- Issue #28444: Fix missing extensions modules when cross compiling.
-- Issue #26909: Fix slow pipes IO in asyncio.
- Patch by INADA Naoki.
+- Issue #28208: Update Windows build and OS X installers to use SQLite 3.14.2.
-- Issue #28176: Fix callbacks race in asyncio.SelectorLoop.sock_connect.
+- Issue #28248: Update Windows build and OS X installers to use OpenSSL 1.0.2j.
-- Issue #27759: Fix selectors incorrectly retain invalid file descriptors.
- Patch by Mark Williams.
+Tests
+-----
-- Issue #28368: Refuse monitoring processes if the child watcher has
- no loop attached.
- Patch by Vincent Michel.
+- Issue #26944: Fix test_posix for Android where 'id -G' is entirely wrong or
+ missing the effective gid.
-- Issue #28369: Raise RuntimeError when transport's FD is used with
- add_reader, add_writer, etc.
+- Issue #28409: regrtest: fix the parser of command line arguments.
-- Issue #28370: Speedup asyncio.StreamReader.readexactly.
- Patch by Коренберг Марк.
-- Issue #28371: Deprecate passing asyncio.Handles to run_in_executor.
+What's New in Python 3.6.0 beta 2?
+==================================
-- Issue #28372: Fix asyncio to support formatting of non-python coroutines.
+*Release date: 2016-10-10*
-- Issue #28399: Remove UNIX socket from FS before binding.
- Patch by Коренберг Марк.
+Core and Builtins
+-----------------
-- Issue #27972: Prohibit Tasks to await on themselves.
+- Issue #28183: Optimize and cleanup dict iteration.
-- Issue #26923: Fix asyncio.Gather to refuse being cancelled once all
- children are done.
- Patch by Johannes Ebke.
+- Issue #26081: Added C implementation of asyncio.Future.
+ Original patch by Yury Selivanov.
-- Issue #26796: Don't configure the number of workers for default
- threadpool executor.
- Initial patch by Hans Lawrenz.
+- Issue #28379: Added sanity checks and tests for PyUnicode_CopyCharacters().
+ Patch by Xiang Zhang.
-- Issue #28600: Optimize loop.call_soon().
+- Issue #28376: The type of long range iterator is now registered as Iterator.
+ Patch by Oren Milman.
-- Issue #28613: Fix get_event_loop() return the current loop if
- called from coroutines/callbacks.
+- Issue #28376: Creating instances of range_iterator by calling range_iterator
+ type now is deprecated. Patch by Oren Milman.
-- Issue #28639: Fix inspect.isawaitable to always return bool
- Patch by Justin Mayfield.
+- Issue #28376: The constructor of range_iterator now checks that step is not 0.
+ Patch by Oren Milman.
-- Issue #28652: Make loop methods reject socket kinds they do not support.
+- Issue #26906: Resolving special methods of uninitialized type now causes
+ implicit initialization of the type instead of a fail.
-- Issue #28653: Fix a refleak in functools.lru_cache.
+- Issue #18287: PyType_Ready() now checks that tp_name is not NULL.
+ Original patch by Niklas Koep.
-- Issue #28703: Fix asyncio.iscoroutinefunction to handle Mock objects.
+- Issue #24098: Fixed possible crash when AST is changed in process of
+ compiling it.
-- Issue #24142: Reading a corrupt config file left the parser in an
- invalid state. Original patch by Florian Höch.
+- Issue #28201: Dict reduces possibility of 2nd conflict in hash table when
+ hashes have same lower bits.
-- Issue #28990: Fix SSL hanging if connection is closed before handshake
- completed.
- (Patch by HoHo-Ho)
+- Issue #28350: String constants with null character no longer interned.
-IDLE
-----
+- Issue #26617: Fix crash when GC runs during weakref callbacks.
-- Issue #15308: Add 'interrupt execution' (^C) to Shell menu.
- Patch by Roger Serwy, updated by Bayard Randel.
+- Issue #27942: String constants now interned recursively in tuples and frozensets.
-- Issue #27922: Stop IDLE tests from 'flashing' gui widgets on the screen.
+- Issue #21578: Fixed misleading error message when ImportError called with
+ invalid keyword args.
-- Add version to title of IDLE help window.
+- Issue #28203: Fix incorrect type in complex(1.0, {2:3}) error message.
+ Patch by Soumya Sharma.
-- Issue #25564: In section on IDLE -- console differences, mention that
- using exec means that __builtins__ is defined for each statement.
+- Issue #28086: Single var-positional argument of tuple subtype was passed
+ unscathed to the C-defined function. Now it is converted to exact tuple.
-- Issue #27714: text_textview and test_autocomplete now pass when re-run
- in the same process. This occurs when test_idle fails when run with the
- -w option but without -jn. Fix warning from test_config.
+- Issue #28214: Now __set_name__ is looked up on the class instead of the
+ instance.
-- Issue #25507: IDLE no longer runs buggy code because of its tkinter imports.
- Users must include the same imports required to run directly in Python.
+- Issue #27955: Fallback on reading /dev/urandom device when the getrandom()
+ syscall fails with EPERM, for example when blocked by SECCOMP.
-- Issue #27452: add line counter and crc to IDLE configHandler test dump.
+- Issue #28192: Don't import readline in isolated mode.
-- Issue #27365: Allow non-ascii chars in IDLE NEWS.txt, for contributor names.
+- Upgrade internal unicode databases to Unicode version 9.0.0.
-- Issue #27245: IDLE: Cleanly delete custom themes and key bindings.
- Previously, when IDLE was started from a console or by import, a cascade
- of warnings was emitted. Patch by Serhiy Storchaka.
+- Issue #28131: Fix a regression in zipimport's compile_source(). zipimport
+ should use the same optimization level as the interpreter.
-C API
------
+- Issue #28126: Replace Py_MEMCPY with memcpy(). Visual Studio can properly
+ optimize memcpy().
-- Issue #28808: PyUnicode_CompareWithASCIIString() now never raises exceptions.
+- Issue #28120: Fix dict.pop() for splitted dictionary when trying to remove a
+ "pending key" (Not yet inserted in split-table). Patch by Xiang Zhang.
-- Issue #26754: PyUnicode_FSDecoder() accepted a filename argument encoded as
- an iterable of integers. Now only strings and bytes-like objects are accepted.
+- Issue #26182: Raise DeprecationWarning when async and await keywords are
+ used as variable/attribute/class/function name.
-Documentation
--------------
+Library
+-------
-- Issue #28513: Documented command-line interface of zipfile.
+- Issue #27998: Fixed bytes path support in os.scandir() on Windows.
+ Patch by Eryk Sun.
-Tests
------
+- Issue #28317: The disassembler now decodes FORMAT_VALUE argument.
-- Issue #28950: Disallow -j0 to be combined with -T/-l/-M in regrtest
- command line arguments.
+- Issue #26293: Fixed writing ZIP files that starts not from the start of the
+ file. Offsets in ZIP file now are relative to the start of the archive in
+ conforming to the specification.
-- Issue #28666: Now test.support.rmtree is able to remove unwritable or
- unreadable directories.
+- Issue #28380: unittest.mock Mock autospec functions now properly support
+ assert_called, assert_not_called, and assert_called_once.
-- Issue #23839: Various caches now are cleared before running every test file.
+- Issue #27181 remove statistics.geometric_mean and defer until 3.7.
-- Issue #28409: regrtest: fix the parser of command line arguments.
+- Issue #28229: lzma module now supports pathlib.
-- Issue #27787: Call gc.collect() before checking each test for "dangling
- threads", since the dangling threads are weak references.
+- Issue #28321: Fixed writing non-BMP characters with binary format in plistlib.
-- Issue #27369: In test_pyexpat, avoid testing an error message detail that
- changed in Expat 2.2.0.
+- Issue #28225: bz2 module now supports pathlib. Initial patch by Ethan Furman.
-Tools/Demos
------------
+- Issue #28227: gzip now supports pathlib. Patch by Ethan Furman.
-- Issue #27952: Get Tools/scripts/fixcid.py working with Python 3 and the
- current "re" module, avoid invalid Python backslash escapes, and fix a bug
- parsing escaped C quote signs.
+- Issue #27358: Optimized merging var-keyword arguments and improved error
+ message when pass a non-mapping as a var-keyword argument.
-- Issue #27332: Fixed the type of the first argument of module-level functions
- generated by Argument Clinic. Patch by Petr Viktorin.
+- Issue #28257: Improved error message when pass a non-iterable as
+ a var-positional argument. Added opcode BUILD_TUPLE_UNPACK_WITH_CALL.
-- Issue #27418: Fixed Tools/importbench/importbench.py.
+- Issue #28322: Fixed possible crashes when unpickle itertools objects from
+ incorrect pickle data. Based on patch by John Leitch.
-Windows
--------
+- Issue #28228: imghdr now supports pathlib.
-- Issue #28251: Improvements to help manuals on Windows.
+- Issue #28226: compileall now supports pathlib.
-- Issue #28110: launcher.msi has different product codes between 32-bit and
- 64-bit
+- Issue #28314: Fix function declaration (C flags) for the getiterator() method
+ of xml.etree.ElementTree.Element.
-- Issue #25144: Ensures TargetDir is set before continuing with custom
- install.
+- Issue #28148: Stop using localtime() and gmtime() in the time
+ module.
-- Issue #27469: Adds a shell extension to the launcher so that drag and drop
- works correctly.
+ Introduced platform independent _PyTime_localtime API that is
+ similar to POSIX localtime_r, but available on all platforms. Patch
+ by Ed Schouten.
-- Issue #27309: Enabled proper Windows styles in python[w].exe manifest.
+- Issue #28253: Fixed calendar functions for extreme months: 0001-01
+ and 9999-12.
-Build
------
+ Methods itermonthdays() and itermonthdays2() are reimplemented so
+ that they don't call itermonthdates() which can cause datetime.date
+ under/overflow.
-- Issue #23903: Added missed names to PC/python3.def.
+- Issue #28275: Fixed possible use after free in the decompress()
+ methods of the LZMADecompressor and BZ2Decompressor classes.
+ Original patch by John Leitch.
-- Issue #10656: Fix out-of-tree building on AIX. Patch by Tristan Carel and
- Michael Haubenwallner.
+- Issue #27897: Fixed possible crash in sqlite3.Connection.create_collation()
+ if pass invalid string-like object as a name. Patch by Xiang Zhang.
-- Issue #26359: Rename --with-optimiations to --enable-optimizations.
+- Issue #18844: random.choices() now has k as a keyword-only argument
+ to improve the readability of common cases and come into line
+ with the signature used in other languages.
-- Issue #28444: Fix missing extensions modules when cross compiling.
+- Issue #18893: Fix invalid exception handling in Lib/ctypes/macholib/dyld.py.
+ Patch by Madison May.
-- Issue #28248: Update Windows build and OS X installers to use OpenSSL 1.0.2j.
+- Issue #27611: Fixed support of default root window in the tkinter.tix module.
+ Added the master parameter in the DisplayStyle constructor.
-- Issue #28258: Fixed build with Estonian locale (python-config and distclean
- targets in Makefile). Patch by Arfrever Frehtes Taifersar Arahesis.
+- Issue #27348: In the traceback module, restore the formatting of exception
+ messages like "Exception: None". This fixes a regression introduced in
+ 3.5a2.
-- Issue #26661: setup.py now detects system libffi with multiarch wrapper.
+- Issue #25651: Allow falsy values to be used for msg parameter of subTest().
-- Issue #28066: Fix the logic that searches build directories for generated
- include files when building outside the source tree.
+- Issue #27778: Fix a memory leak in os.getrandom() when the getrandom() is
+ interrupted by a signal and a signal handler raises a Python exception.
-- Issue #15819: Remove redundant include search directory option for building
- outside the source tree.
+- Issue #28200: Fix memory leak on Windows in the os module (fix
+ path_converter() function).
-- Issue #27566: Fix clean target in freeze makefile (patch by Lisa Roach)
+- Issue #25400: RobotFileParser now correctly returns default values for
+ crawl_delay and request_rate. Initial patch by Peter Wirtz.
-- Issue #27705: Update message in validate_ucrtbase.py
+- Issue #27932: Prevent memory leak in win32_ver().
-- Issue #27983: Cause lack of llvm-profdata tool when using clang as
- required for PGO linking to be a configure time error rather than
- make time when --with-optimizations is enabled. Also improve our
- ability to find the llvm-profdata tool on MacOS and some Linuxes.
+- Fix UnboundLocalError in socket._sendfile_use_sendfile.
-- Issue #26307: The profile-opt build now applies PGO to the built-in modules.
+- Issue #28075: Check for ERROR_ACCESS_DENIED in Windows implementation of
+ os.stat(). Patch by Eryk Sun.
-- Issue #26359: Add the --with-optimizations configure flag.
+- Issue #22493: Warning message emitted by using inline flags in the middle of
+ regular expression now contains a (truncated) regex pattern.
+ Patch by Tim Graham.
-- Issue #27713: Suppress spurious build warnings when updating importlib's
- bootstrap files. Patch by Xiang Zhang
+- Issue #25270: Prevent codecs.escape_encode() from raising SystemError when
+ an empty bytestring is passed.
-- Issue #25825: Correct the references to Modules/python.exp and ld_so_aix,
- which are required on AIX. This updates references to an installation path
- that was changed in 3.2a4, and undoes changed references to the build tree
- that were made in 3.5.0a1.
+- Issue #28181: Get antigravity over HTTPS. Patch by Kaartic Sivaraam.
-- Issue #27453: CPP invocation in configure must use CPPFLAGS. Patch by
- Chi Hsuan Yen.
+- Issue #25895: Enable WebSocket URL schemes in urllib.parse.urljoin.
+ Patch by Gergely Imreh and Markus Holtermann.
-- Issue #27641: The configure script now inserts comments into the makefile
- to prevent the pgen and _freeze_importlib executables from being cross-
- compiled.
+- Issue #28114: Fix a crash in parse_envlist() when env contains byte strings.
+ Patch by Eryk Sun.
-- Issue #26662: Set PYTHON_FOR_GEN in configure as the Python program to be
- used for file generation during the build.
+- Issue #27599: Fixed buffer overrun in binascii.b2a_qp() and binascii.a2b_qp().
-- Issue #10910: Avoid C++ compilation errors on FreeBSD and OS X.
- Also update FreedBSD version checks for the original ctype UTF-8 workaround.
+- Issue #27906: Fix socket accept exhaustion during high TCP traffic.
+ Patch by Kevin Conway.
-- Issue #28676: Prevent missing 'getentropy' declaration warning on macOS.
- Patch by Gareth Rees.
+- Issue #28174: Handle when SO_REUSEPORT isn't properly supported.
+ Patch by Seth Michael Larson.
+- Issue #26654: Inspect functools.partial in asyncio.Handle.__repr__.
+ Patch by iceboy.
-What's New in Python 3.5.2?
-===========================
+- Issue #26909: Fix slow pipes IO in asyncio.
+ Patch by INADA Naoki.
-Release date: 2016-06-26
+- Issue #28176: Fix callbacks race in asyncio.SelectorLoop.sock_connect.
-Core and Builtins
------------------
+- Issue #27759: Fix selectors incorrectly retain invalid file descriptors.
+ Patch by Mark Williams.
-- Issue #26930: Update Windows builds to use OpenSSL 1.0.2h.
+- Issue #28368: Refuse monitoring processes if the child watcher has no
+ loop attached.
+ Patch by Vincent Michel.
-Tests
------
+- Issue #28369: Raise RuntimeError when transport's FD is used with
+ add_reader, add_writer, etc.
-- Issue #26867: Ubuntu's openssl OP_NO_SSLv3 is forced on by default; fix test.
+- Issue #28370: Speedup asyncio.StreamReader.readexactly.
+ Patch by Коренберг Марк.
-IDLE
-----
+- Issue #28371: Deprecate passing asyncio.Handles to run_in_executor.
-- Issue #27365: Allow non-ascii in idlelib/NEWS.txt - minimal part for 3.5.2.
+- Issue #28372: Fix asyncio to support formatting of non-python coroutines.
+- Issue #28399: Remove UNIX socket from FS before binding.
+ Patch by Коренберг Марк.
-What's New in Python 3.5.2 release candidate 1?
-===============================================
+- Issue #27972: Prohibit Tasks to await on themselves.
-Release date: 2016-06-12
+Windows
+-------
-Core and Builtins
------------------
+- Issue #28402: Adds signed catalog files for stdlib on Windows.
-- Issue #27066: Fixed SystemError if a custom opener (for open()) returns a
- negative number without setting an exception.
+- Issue #28333: Enables Unicode for ps1/ps2 and input() prompts. (Patch by
+ Eryk Sun)
-- Issue #20041: Fixed TypeError when frame.f_trace is set to None.
- Patch by Xavier de Gaye.
+- Issue #28251: Improvements to help manuals on Windows.
-- Issue #26168: Fixed possible refleaks in failing Py_BuildValue() with the "N"
- format unit.
+- Issue #28110: launcher.msi has different product codes between 32-bit and
+ 64-bit
-- Issue #26991: Fix possible refleak when creating a function with annotations.
+- Issue #28161: Opening CON for write access fails
-- Issue #27039: Fixed bytearray.remove() for values greater than 127. Patch by
- Joe Jevnik.
+- Issue #28162: WindowsConsoleIO readall() fails if first line starts with
+ Ctrl+Z
-- Issue #23640: int.from_bytes() no longer bypasses constructors for subclasses.
+- Issue #28163: WindowsConsoleIO fileno() passes wrong flags to
+ _open_osfhandle
-- Issue #26811: gc.get_objects() no longer contains a broken tuple with NULL
- pointer.
+- Issue #28164: _PyIO_get_console_type fails for various paths
-- Issue #20120: Use RawConfigParser for .pypirc parsing,
- removing support for interpolation unintentionally added
- with move to Python 3. Behavior no longer does any
- interpolation in .pypirc files, matching behavior in Python
- 2.7 and Setuptools 19.0.
+- Issue #28137: Renames Windows path file to ._pth
-- Issue #26659: Make the builtin slice type support cycle collection.
+- Issue #28138: Windows ._pth file should allow import site
-- Issue #26718: super.__init__ no longer leaks memory if called multiple times.
- NOTE: A direct call of super.__init__ is not endorsed!
+C API
+-----
-- Issue #25339: PYTHONIOENCODING now has priority over locale in setting the
- error handler for stdin and stdout.
+- Issue #28426: Deprecated undocumented functions PyUnicode_AsEncodedObject(),
+ PyUnicode_AsDecodedObject(), PyUnicode_AsDecodedUnicode() and
+ PyUnicode_AsEncodedUnicode().
-- Issue #26494: Fixed crash on iterating exhausting iterators.
- Affected classes are generic sequence iterators, iterators of str, bytes,
- bytearray, list, tuple, set, frozenset, dict, OrderedDict, corresponding
- views and os.scandir() iterator.
+Build
+-----
-- Issue #26581: If coding cookie is specified multiple times on a line in
- Python source code file, only the first one is taken to account.
+- Issue #28258: Fixed build with Estonian locale (python-config and distclean
+ targets in Makefile). Patch by Arfrever Frehtes Taifersar Arahesis.
-- Issue #26464: Fix str.translate() when string is ASCII and first replacements
- removes character, but next replacement uses a non-ASCII character or a
- string longer than 1 character. Regression introduced in Python 3.5.0.
+- Issue #26661: setup.py now detects system libffi with multiarch wrapper.
-- Issue #22836: Ensure exception reports from PyErr_Display() and
- PyErr_WriteUnraisable() are sensible even when formatting them produces
- secondary errors. This affects the reports produced by
- sys.__excepthook__() and when __del__() raises an exception.
+- Issue #15819: Remove redundant include search directory option for building
+ outside the source tree.
-- Issue #26302: Correct behavior to reject comma as a legal character for
- cookie names.
+Tests
+-----
-- Issue #4806: Avoid masking the original TypeError exception when using star
- (*) unpacking in function calls. Based on patch by Hagen Fürstenau and
- Daniel Urban.
+- Issue #28217: Adds _testconsole module to test console input.
-- Issue #27138: Fix the doc comment for FileFinder.find_spec().
-- Issue #26154: Add a new private _PyThreadState_UncheckedGet() function to get
- the current Python thread state, but don't issue a fatal error if it is NULL.
- This new function must be used instead of accessing directly the
- _PyThreadState_Current variable. The variable is no more exposed since
- Python 3.5.1 to hide the exact implementation of atomic C types, to avoid
- compiler issues.
+What's New in Python 3.6.0 beta 1?
+==================================
-- Issue #26194: Deque.insert() gave odd results for bounded deques that had
- reached their maximum size. Now an IndexError will be raised when attempting
- to insert into a full deque.
+*Release date: 2016-09-12*
-- Issue #25843: When compiling code, don't merge constants if they are equal
- but have a different types. For example, ``f1, f2 = lambda: 1, lambda: 1.0``
- is now correctly compiled to two different functions: ``f1()`` returns ``1``
- (``int``) and ``f2()`` returns ``1.0`` (``int``), even if ``1`` and ``1.0``
- are equal.
+Core and Builtins
+-----------------
-- Issue #22995: [UPDATE] Comment out the one of the pickleability tests in
- _PyObject_GetState() due to regressions observed in Cython-based projects.
+- Issue #23722: The __class__ cell used by zero-argument super() is now
+ initialized from type.__new__ rather than __build_class__, so class methods
+ relying on that will now work correctly when called from metaclass methods
+ during class creation. Patch by Martin Teichmann.
-- Issue #25961: Disallowed null characters in the type name.
+- Issue #25221: Fix corrupted result from PyLong_FromLong(0) when Python
+ is compiled with NSMALLPOSINTS = 0.
-- Issue #25973: Fix segfault when an invalid nonlocal statement binds a name
- starting with two underscores.
+- Issue #27080: Implement formatting support for PEP 515. Initial patch
+ by Chris Angelico.
-- Issue #22995: Instances of extension types with a state that aren't
- subclasses of list or dict and haven't implemented any pickle-related
- methods (__reduce__, __reduce_ex__, __getnewargs__, __getnewargs_ex__,
- or __getstate__), can no longer be pickled. Including memoryview.
+- Issue #27199: In tarfile, expose copyfileobj bufsize to improve throughput.
+ Patch by Jason Fried.
-- Issue #20440: Massive replacing unsafe attribute setting code with special
- macro Py_SETREF.
+- Issue #27948: In f-strings, only allow backslashes inside the braces
+ (where the expressions are). This is a breaking change from the 3.6
+ alpha releases, where backslashes are allowed anywhere in an
+ f-string. Also, require that expressions inside f-strings be
+ enclosed within literal braces, and not escapes like
+ f'\x7b"hi"\x7d'.
-- Issue #25766: Special method __bytes__() now works in str subclasses.
+- Issue #28046: Remove platform-specific directories from sys.path.
-- Issue #25421: __sizeof__ methods of builtin types now use dynamic basic size.
- This allows sys.getsize() to work correctly with their subclasses with
- __slots__ defined.
+- Issue #28071: Add early-out for differencing from an empty set.
-- Issue #25709: Fixed problem with in-place string concatenation and utf-8
- cache.
+- Issue #25758: Prevents zipimport from unnecessarily encoding a filename
+ (patch by Eryk Sun)
-- Issue #27147: Mention PEP 420 in the importlib docs.
+- Issue #25856: The __module__ attribute of extension classes and functions
+ now is interned. This leads to more compact pickle data with protocol 4.
-- Issue #24097: Fixed crash in object.__reduce__() if slot name is freed inside
- __getattr__.
+- Issue #27213: Rework CALL_FUNCTION* opcodes to produce shorter and more
+ efficient bytecode. Patch by Demur Rumed, design by Serhiy Storchaka,
+ reviewed by Serhiy Storchaka and Victor Stinner.
-- Issue #24731: Fixed crash on converting objects with special methods
- __bytes__, __trunc__, and __float__ returning instances of subclasses of
- bytes, int, and float to subclasses of bytes, int, and float correspondingly.
+- Issue #26331: Implement tokenizing support for PEP 515. Patch by Georg Brandl.
-- Issue #26478: Fix semantic bugs when using binary operators with dictionary
- views and tuples.
+- Issue #27999: Make "global after use" a SyntaxError, and ditto for nonlocal.
+ Patch by Ivan Levkivskyi.
-- Issue #26171: Fix possible integer overflow and heap corruption in
- zipimporter.get_data().
+- Issue #28003: Implement PEP 525 -- Asynchronous Generators.
-- Issue #25660: Fix TAB key behaviour in REPL with readline.
+- Issue #27985: Implement PEP 526 -- Syntax for Variable Annotations.
+ Patch by Ivan Levkivskyi.
-- Issue #25887: Raise a RuntimeError when a coroutine object is awaited
- more than once.
+- Issue #26058: Add a new private version to the builtin dict type, incremented
+ at each dictionary creation and at each dictionary change. Implementation of
+ the PEP 509.
-- Issue #27243: Update the __aiter__ protocol: instead of returning
- an awaitable that resolves to an asynchronous iterator, the asynchronous
- iterator should be returned directly. Doing the former will trigger a
- PendingDeprecationWarning.
+- Issue #27364: A backslash-character pair that is not a valid escape sequence
+ now generates a DeprecationWarning. Patch by Emanuel Barry.
+- Issue #27350: `dict` implementation is changed like PyPy. It is more compact
+ and preserves insertion order.
+ (Concept developed by Raymond Hettinger and patch by Inada Naoki.)
-Library
--------
+- Issue #27911: Remove unnecessary error checks in
+ ``exec_builtin_or_dynamic()``.
-- [Security] Issue #26556: Update expat to 2.1.1, fixes CVE-2015-1283.
+- Issue #27078: Added BUILD_STRING opcode. Optimized f-strings evaluation.
-- [Security] Fix TLS stripping vulnerability in smtplib, CVE-2016-0772.
- Reported by Team Oststrom
+- Issue #17884: Python now requires systems with inttypes.h and stdint.h
-- Issue #21386: Implement missing IPv4Address.is_global property. It was
- documented since 07a5610bae9d. Initial patch by Roger Luethi.
+- Issue #27961: Require platforms to support ``long long``. Python hasn't
+ compiled without ``long long`` for years, so this is basically a formality.
-- Issue #20900: distutils register command now decodes HTTP responses
- correctly. Initial patch by ingrid.
+- Issue #27355: Removed support for Windows CE. It was never finished,
+ and Windows CE is no longer a relevant platform for Python.
-- A new version of typing.py provides several new classes and
- features: @overload outside stubs, Reversible, DefaultDict, Text,
- ContextManager, Type[], NewType(), TYPE_CHECKING, and numerous bug
- fixes (note that some of the new features are not yet implemented in
- mypy or other static analyzers). Also classes for PEP 492
- (Awaitable, AsyncIterable, AsyncIterator) have been added (in fact
- they made it into 3.5.1 but were never mentioned).
+- Implement PEP 523.
-- Issue #25738: Stop http.server.BaseHTTPRequestHandler.send_error() from
- sending a message body for 205 Reset Content. Also, don't send Content
- header fields in responses that don't have a body. Patch by Susumu
- Koshiba.
+- Issue #27870: A left shift of zero by a large integer no longer attempts
+ to allocate large amounts of memory.
-- Issue #21313: Fix the "platform" module to tolerate when sys.version
- contains truncated build information.
+- Issue #25402: In int-to-decimal-string conversion, improve the estimate
+ of the intermediate memory required, and remove an unnecessarily strict
+ overflow check. Patch by Serhiy Storchaka.
-- [Security] Issue #26839: On Linux, :func:`os.urandom` now calls
- ``getrandom()`` with ``GRND_NONBLOCK`` to fall back on reading
- ``/dev/urandom`` if the urandom entropy pool is not initialized yet. Patch
- written by Colm Buckley.
+- Issue #27214: In long_invert, be more careful about modifying object
+ returned by long_add, and remove an unnecessary check for small longs.
+ Thanks Oren Milman for analysis and patch.
-- Issue #27164: In the zlib module, allow decompressing raw Deflate streams
- with a predefined zdict. Based on patch by Xiang Zhang.
+- Issue #27506: Support passing the bytes/bytearray.translate() "delete"
+ argument by keyword.
-- Issue #24291: Fix wsgiref.simple_server.WSGIRequestHandler to completely
- write data to the client. Previously it could do partial writes and
- truncate data. Also, wsgiref.handler.ServerHandler can now handle stdout
- doing partial writes, but this is deprecated.
+- Issue #27812: Properly clear out a generator's frame's backreference to the
+ generator to prevent crashes in frame.clear().
-- Issue #26809: Add ``__all__`` to :mod:`string`. Patch by Emanuel Barry.
+- Issue #27811: Fix a crash when a coroutine that has not been awaited is
+ finalized with warnings-as-errors enabled.
-- Issue #26373: subprocess.Popen.communicate now correctly ignores
- BrokenPipeError when the child process dies before .communicate()
- is called in more/all circumstances.
+- Issue #27587: Fix another issue found by PVS-Studio: Null pointer check
+ after use of 'def' in _PyState_AddModule().
+ Initial patch by Christian Heimes.
-- Issue #21776: distutils.upload now correctly handles HTTPError.
- Initial patch by Claudiu Popa.
+- Issue #27792: The modulo operation applied to ``bool`` and other
+ ``int`` subclasses now always returns an ``int``. Previously
+ the return type depended on the input values. Patch by Xiang Zhang.
-- Issue #27114: Fix SSLContext._load_windows_store_certs fails with
- PermissionError
+- Issue #26984: int() now always returns an instance of exact int.
-- Issue #18383: Avoid creating duplicate filters when using filterwarnings
- and simplefilter. Based on patch by Alex Shkop.
+- Issue #25604: Fix a minor bug in integer true division; this bug could
+ potentially have caused off-by-one-ulp results on platforms with
+ unreliable ldexp implementations.
-- Issue #27057: Fix os.set_inheritable() on Android, ioctl() is blocked by
- SELinux and fails with EACCESS. The function now falls back to fcntl().
- Patch written by Michał Bednarski.
+- Issue #24254: Make class definition namespace ordered by default.
-- Issue #27014: Fix infinite recursion using typing.py. Thanks to Kalle Tuure!
+- Issue #27662: Fix an overflow check in ``List_New``: the original code was
+ checking against ``Py_SIZE_MAX`` instead of the correct upper bound of
+ ``Py_SSIZE_T_MAX``. Patch by Xiang Zhang.
-- Issue #14132: Fix urllib.request redirect handling when the target only has
- a query string. Original fix by Ján Janech.
+- Issue #27782: Multi-phase extension module import now correctly allows the
+ ``m_methods`` field to be used to add module level functions to instances
+ of non-module types returned from ``Py_create_mod``. Patch by Xiang Zhang.
-- Issue #17214: The "urllib.request" module now percent-encodes non-ASCII
- bytes found in redirect target URLs. Some servers send Location header
- fields with non-ASCII bytes, but "http.client" requires the request target
- to be ASCII-encodable, otherwise a UnicodeEncodeError is raised. Based on
- patch by Christian Heimes.
+- Issue #27936: The round() function accepted a second None argument
+ for some types but not for others. Fixed the inconsistency by
+ accepting None for all numeric types.
-- Issue #26892: Honor debuglevel flag in urllib.request.HTTPHandler. Patch
- contributed by Chi Hsuan Yen.
+- Issue #27487: Warn if a submodule argument to "python -m" or
+ runpy.run_module() is found in sys.modules after parent packages are
+ imported, but before the submodule is executed.
-- Issue #22274: In the subprocess module, allow stderr to be redirected to
- stdout even when stdout is not redirected. Patch by Akira Li.
+- Issue #27157: Make only type() itself accept the one-argument form.
+ Patch by Eryk Sun and Emanuel Barry.
-- Issue #26807: mock_open 'files' no longer error on readline at end of file.
- Patch from Yolanda Robla.
+- Issue #27558: Fix a SystemError in the implementation of "raise" statement.
+ In a brand new thread, raise a RuntimeError since there is no active
+ exception to reraise. Patch written by Xiang Zhang.
-- Issue #25745: Fixed leaking a userptr in curses panel destructor.
+- Issue #28008: Implement PEP 530 -- asynchronous comprehensions.
-- Issue #26977: Removed unnecessary, and ignored, call to sum of squares helper
- in statistics.pvariance.
+- Issue #27942: Fix memory leak in codeobject.c
-- Issue #26881: The modulefinder module now supports extended opcode arguments.
+Library
+-------
-- Issue #23815: Fixed crashes related to directly created instances of types in
- _tkinter and curses.panel modules.
+- Issue #28732: Fix crash in os.spawnv() with no elements in args
-- Issue #17765: weakref.ref() no longer silently ignores keyword arguments.
- Patch by Georg Brandl.
+- Issue #28485: Always raise ValueError for negative
+ compileall.compile_dir(workers=...) parameter, even when multithreading is
+ unavailable.
-- Issue #26873: xmlrpc now raises ResponseError on unsupported type tags
- instead of silently return incorrect result.
+- Issue #28037: Use sqlite3_get_autocommit() instead of setting
+ Connection->inTransaction manually.
-- Issue #26711: Fixed the comparison of plistlib.Data with other types.
+- Issue #25283: Attributes tm_gmtoff and tm_zone are now available on
+ all platforms in the return values of time.localtime() and
+ time.gmtime().
-- Issue #24114: Fix an uninitialized variable in `ctypes.util`.
+- Issue #24454: Regular expression match object groups are now
+ accessible using __getitem__. "mo[x]" is equivalent to
+ "mo.group(x)".
- The bug only occurs on SunOS when the ctypes implementation searches
- for the `crle` program. Patch by Xiang Zhang. Tested on SunOS by
- Kees Bos.
+- Issue #10740: sqlite3 no longer implicitly commit an open transaction
+ before DDL statements.
-- Issue #26864: In urllib.request, change the proxy bypass host checking
- against no_proxy to be case-insensitive, and to not match unrelated host
- names that happen to have a bypassed hostname as a suffix. Patch by Xiang
- Zhang.
+- Issue #17941: Add a *module* parameter to collections.namedtuple().
-- Issue #26634: recursive_repr() now sets __qualname__ of wrapper. Patch by
- Xiang Zhang.
+- Issue #22493: Inline flags now should be used only at the start of the
+ regular expression. Deprecation warning is emitted if uses them in the
+ middle of the regular expression.
-- Issue #26804: urllib.request will prefer lower_case proxy environment
- variables over UPPER_CASE or Mixed_Case ones. Patch contributed by Hans-Peter
- Jansen.
+- Issue #26885: xmlrpc now supports unmarshalling additional data types used
+ by Apache XML-RPC implementation for numerics and None.
-- Issue #26837: assertSequenceEqual() now correctly outputs non-stringified
- differing items (like bytes in the -b mode). This affects assertListEqual()
- and assertTupleEqual().
+- Issue #28070: Fixed parsing inline verbose flag in regular expressions.
-- Issue #26041: Remove "will be removed in Python 3.7" from deprecation
- messages of platform.dist() and platform.linux_distribution().
- Patch by Kumaripaba Miyurusara Athukorala.
+- Issue #19500: Add client-side SSL session resumption to the ssl module.
-- Issue #26822: itemgetter, attrgetter and methodcaller objects no longer
- silently ignore keyword arguments.
+- Issue #28022: Deprecate ssl-related arguments in favor of SSLContext. The
+ deprecation include manual creation of SSLSocket and certfile/keyfile
+ (or similar) in ftplib, httplib, imaplib, smtplib, poplib and urllib.
-- Issue #26733: Disassembling a class now disassembles class and static methods.
- Patch by Xiang Zhang.
+- Issue #28043: SSLContext has improved default settings: OP_NO_SSLv2,
+ OP_NO_SSLv3, OP_NO_COMPRESSION, OP_CIPHER_SERVER_PREFERENCE,
+ OP_SINGLE_DH_USE, OP_SINGLE_ECDH_USE and HIGH ciphers without MD5.
-- Issue #26801: Fix error handling in :func:`shutil.get_terminal_size`, catch
- :exc:`AttributeError` instead of :exc:`NameError`. Patch written by Emanuel
- Barry.
+- Issue #24693: Changed some RuntimeError's in the zipfile module to more
+ appropriate types. Improved some error messages and debugging output.
-- Issue #24838: tarfile's ustar and gnu formats now correctly calculate name
- and link field limits for multibyte character encodings like utf-8.
+- Issue #17909: ``json.load`` and ``json.loads`` now support binary input
+ encoded as UTF-8, UTF-16 or UTF-32. Patch by Serhiy Storchaka.
-- [Security] Issue #26657: Fix directory traversal vulnerability with
- http.server on Windows. This fixes a regression that was introduced in
- 3.3.4rc1 and 3.4.0rc1. Based on patch by Philipp Hagemeister.
+- Issue #27137: the pure Python fallback implementation of ``functools.partial``
+ now matches the behaviour of its accelerated C counterpart for subclassing,
+ pickling and text representation purposes. Patch by Emanuel Barry and
+ Serhiy Storchaka.
-- Issue #26717: Stop encoding Latin-1-ized WSGI paths with UTF-8. Patch by
- Anthony Sottile.
+- Fix possible integer overflows and crashes in the mmap module with unusual
+ usage patterns.
-- Issue #26735: Fix :func:`os.urandom` on Solaris 11.3 and newer when reading
- more than 1,024 bytes: call ``getrandom()`` multiple times with a limit of
- 1024 bytes per call.
+- Issue #1703178: Fix the ability to pass the --link-objects option to the
+ distutils build_ext command.
-- Issue #16329: Add .webm to mimetypes.types_map. Patch by Giampaolo Rodola'.
+- Issue #28019: itertools.count() no longer rounds non-integer step in range
+ between 1.0 and 2.0 to 1.
-- Issue #13952: Add .csv to mimetypes.types_map. Patch by Geoff Wilson.
+- Issue #18401: Pdb now supports the 'readrc' keyword argument to control
+ whether .pdbrc files should be read. Patch by Martin Matusiak and
+ Sam Kimbrel.
-- Issue #26709: Fixed Y2038 problem in loading binary PLists.
+- Issue #25969: Update the lib2to3 grammar to handle the unpacking
+ generalizations added in 3.5.
-- Issue #23735: Handle terminal resizing with Readline 6.3+ by installing our
- own SIGWINCH handler. Patch by Eric Price.
+- Issue #14977: mailcap now respects the order of the lines in the mailcap
+ files ("first match"), as required by RFC 1542. Patch by Michael Lazar.
-- Issue #26586: In http.server, respond with "413 Request header fields too
- large" if there are too many header fields to parse, rather than killing
- the connection and raising an unhandled exception. Patch by Xiang Zhang.
+- Issue #28082: Convert re flag constants to IntFlag.
-- Issue #22854: Change BufferedReader.writable() and
- BufferedWriter.readable() to always return False.
+- Issue #28025: Convert all ssl module constants to IntEnum and IntFlags.
+ SSLContext properties now return flags and enums.
-- Issue #25195: Fix a regression in mock.MagicMock. _Call is a subclass of
- tuple (changeset 3603bae63c13 only works for classes) so we need to
- implement __ne__ ourselves. Patch by Andrew Plummer.
+- Issue #23591: Add Flag, IntFlag, and auto() to enum module.
-- Issue #26644: Raise ValueError rather than SystemError when a negative
- length is passed to SSLSocket.recv() or read().
+- Issue #433028: Added support of modifier spans in regular expressions.
-- Issue #23804: Fix SSL recv(0) and read(0) methods to return zero bytes
- instead of up to 1024.
+- Issue #24594: Validates persist parameter when opening MSI database
-- Issue #26616: Fixed a bug in datetime.astimezone() method.
+- Issue #17582: xml.etree.ElementTree nows preserves whitespaces in attributes
+ (Patch by Duane Griffin. Reviewed and approved by Stefan Behnel.)
-- Issue #21925: :func:`warnings.formatwarning` now catches exceptions on
- ``linecache.getline(...)`` to be able to log :exc:`ResourceWarning` emitted
- late during the Python shutdown process.
+- Issue #28047: Fixed calculation of line length used for the base64 CTE
+ in the new email policies.
-- Issue #24266: Ctrl+C during Readline history search now cancels the search
- mode when compiled with Readline 7.
+- Issue #27576: Fix call order in OrderedDict.__init__().
-- Issue #26560: Avoid potential ValueError in BaseHandler.start_response.
- Initial patch by Peter Inglesby.
+- email.generator.DecodedGenerator now supports the policy keyword.
-- [Security] Issue #26313: ssl.py _load_windows_store_certs fails if windows
- cert store is empty. Patch by Baji.
+- Issue #28027: Remove undocumented modules from ``Lib/plat-*``: IN, CDROM,
+ DLFCN, TYPES, CDIO, and STROPTS.
-- Issue #26569: Fix :func:`pyclbr.readmodule` and :func:`pyclbr.readmodule_ex`
- to support importing packages.
+- Issue #27445: Don't pass str(_charset) to MIMEText.set_payload().
+ Patch by Claude Paroz.
-- Issue #26499: Account for remaining Content-Length in
- HTTPResponse.readline() and read1(). Based on patch by Silent Ghost.
- Also document that HTTPResponse now supports these methods.
+- Issue #24277: The new email API is no longer provisional, and the docs
+ have been reorganized and rewritten to emphasize the new API.
-- Issue #25320: Handle sockets in directories unittest discovery is scanning.
- Patch from Victor van den Elzen.
+- Issue #22450: urllib now includes an "Accept: */*" header among the
+ default headers. This makes the results of REST API requests more
+ consistent and predictable especially when proxy servers are involved.
-- Issue #16181: cookiejar.http2time() now returns None if year is higher than
- datetime.MAXYEAR.
+- lib2to3.pgen3.driver.load_grammar() now creates a stable cache file
+ between runs given the same Grammar.txt input regardless of the hash
+ randomization setting.
-- Issue #26513: Fixes platform module detection of Windows Server
+- Issue #28005: Allow ImportErrors in encoding implementation to propagate.
-- Issue #23718: Fixed parsing time in week 0 before Jan 1. Original patch by
- Tamás Bence Gedai.
+- Issue #26667: Support path-like objects in importlib.util.
-- Issue #20589: Invoking Path.owner() and Path.group() on Windows now raise
- NotImplementedError instead of ImportError.
+- Issue #27570: Avoid zero-length memcpy() etc calls with null source
+ pointers in the "ctypes" and "array" modules.
-- Issue #26177: Fixed the keys() method for Canvas and Scrollbar widgets.
+- Issue #22233: Break email header lines *only* on the RFC specified CR and LF
+ characters, not on arbitrary unicode line breaks. This also fixes a bug in
+ HTTP header parsing.
-- Issue #15068: Got rid of excessive buffering in the fileinput module.
- The bufsize parameter is no longer used.
+- Issue 27331: The email.mime classes now all accept an optional policy keyword.
-- Issue #2202: Fix UnboundLocalError in
- AbstractDigestAuthHandler.get_algorithm_impls. Initial patch by Mathieu
- Dupuy.
+- Issue 27988: Fix email iter_attachments incorrect mutation of payload list.
-- Issue #25718: Fixed pickling and copying the accumulate() iterator with
- total is None.
+- Issue #16113: Add SHA-3 and SHAKE support to hashlib module.
-- Issue #26475: Fixed debugging output for regular expressions with the (?x)
- flag.
+- Eliminate a tautological-pointer-compare warning in _scproxy.c.
-- Issue #26457: Fixed the subnets() methods in IP network classes for the case
- when resulting prefix length is equal to maximal prefix length.
- Based on patch by Xiang Zhang.
+- Issue #27776: The :func:`os.urandom` function does now block on Linux 3.17
+ and newer until the system urandom entropy pool is initialized to increase
+ the security. This change is part of the :pep:`524`.
-- Issue #26385: Remove the file if the internal open() call in
- NamedTemporaryFile() fails. Patch by Silent Ghost.
+- Issue #27778: Expose the Linux ``getrandom()`` syscall as a new
+ :func:`os.getrandom` function. This change is part of the :pep:`524`.
-- Issue #26402: Fix XML-RPC client to retry when the server shuts down a
- persistent connection. This was a regression related to the new
- http.client.RemoteDisconnected exception in 3.5.0a4.
+- Issue #27691: Fix ssl module's parsing of GEN_RID subject alternative name
+ fields in X.509 certs.
-- Issue #25913: Leading ``<~`` is optional now in base64.a85decode() with
- adobe=True. Patch by Swati Jaiswal.
+- Issue #18844: Add random.choices().
-- Issue #26186: Remove an invalid type check in importlib.util.LazyLoader.
+- Issue #25761: Improved error reporting about truncated pickle data in
+ C implementation of unpickler. UnpicklingError is now raised instead of
+ AttributeError and ValueError in some cases.
-- Issue #26367: importlib.__import__() raises SystemError like
- builtins.__import__() when ``level`` is specified but without an accompanying
- package specified.
+- Issue #26798: Add BLAKE2 (blake2b and blake2s) to hashlib.
-- Issue #26309: In the "socketserver" module, shut down the request (closing
- the connected socket) when verify_request() returns false. Patch by Aviv
- Palivoda.
+- Issue #26032: Optimized globbing in pathlib by using os.scandir(); it is now
+ about 1.5--4 times faster.
-- [Security] Issue #25939: On Windows open the cert store readonly in
- ssl.enum_certificates.
+- Issue #25596: Optimized glob() and iglob() functions in the
+ glob module; they are now about 3--6 times faster.
-- Issue #25995: os.walk() no longer uses FDs proportional to the tree depth.
+- Issue #27928: Add scrypt (password-based key derivation function) to
+ hashlib module (requires OpenSSL 1.1.0).
-- Issue #26117: The os.scandir() iterator now closes file descriptor not only
- when the iteration is finished, but when it was failed with error.
+- Issue #27850: Remove 3DES from ssl module's default cipher list to counter
+ measure sweet32 attack (CVE-2016-2183).
-- Issue #25911: Restored support of bytes paths in os.walk() on Windows.
+- Issue #27766: Add ChaCha20 Poly1305 to ssl module's default ciper list.
+ (Required OpenSSL 1.1.0 or LibreSSL).
-- Issue #26045: Add UTF-8 suggestion to error message when posting a
- non-Latin-1 string with http.client.
+- Issue #25387: Check return value of winsound.MessageBeep.
-- Issue #12923: Reset FancyURLopener's redirect counter even if there is an
- exception. Based on patches by Brian Brazil and Daniel Rocco.
+- Issue #27866: Add SSLContext.get_ciphers() method to get a list of all
+ enabled ciphers.
-- Issue #25945: Fixed a crash when unpickle the functools.partial object with
- wrong state. Fixed a leak in failed functools.partial constructor.
- "args" and "keywords" attributes of functools.partial have now always types
- tuple and dict correspondingly.
+- Issue #27744: Add AF_ALG (Linux Kernel crypto) to socket module.
-- Issue #26202: copy.deepcopy() now correctly copies range() objects with
- non-atomic attributes.
+- Issue #26470: Port ssl and hashlib module to OpenSSL 1.1.0.
-- Issue #23076: Path.glob() now raises a ValueError if it's called with an
- invalid pattern. Patch by Thomas Nyberg.
+- Issue #11620: Fix support for SND_MEMORY in winsound.PlaySound. Based on a
+ patch by Tim Lesher.
-- Issue #19883: Fixed possible integer overflows in zipimport.
+- Issue #11734: Add support for IEEE 754 half-precision floats to the
+ struct module. Based on a patch by Eli Stevens.
-- Issue #26227: On Windows, getnameinfo(), gethostbyaddr() and
- gethostbyname_ex() functions of the socket module now decode the hostname
- from the ANSI code page rather than UTF-8.
+- Issue #27919: Deprecated ``extra_path`` distribution option in distutils
+ packaging.
-- Issue #26147: xmlrpc now works with strings not encodable with used
- non-UTF-8 encoding.
+- Issue #23229: Add new ``cmath`` constants: ``cmath.inf`` and ``cmath.nan`` to
+ match ``math.inf`` and ``math.nan``, and also ``cmath.infj`` and
+ ``cmath.nanj`` to match the format used by complex repr.
-- Issue #25935: Garbage collector now breaks reference loops with OrderedDict.
+- Issue #27842: The csv.DictReader now returns rows of type OrderedDict.
+ (Contributed by Steve Holden.)
-- Issue #16620: Fixed AttributeError in msilib.Directory.glob().
+- Remove support for passing a file descriptor to os.access. It never worked but
+ previously didn't raise.
-- Issue #26013: Added compatibility with broken protocol 2 pickles created
- in old Python 3 versions (3.4.3 and lower).
+- Issue #12885: Fix error when distutils encounters symlink.
-- Issue #25850: Use cross-compilation by default for 64-bit Windows.
+- Issue #27881: Fixed possible bugs when setting sqlite3.Connection.isolation_level.
+ Based on patch by Xiang Zhang.
-- Issue #17633: Improve zipimport's support for namespace packages.
+- Issue #27861: Fixed a crash in sqlite3.Connection.cursor() when a factory
+ creates not a cursor. Patch by Xiang Zhang.
-- Issue #24705: Fix sysconfig._parse_makefile not expanding ${} vars
- appearing before $() vars.
+- Issue #19884: Avoid spurious output on OS X with Gnu Readline.
-- Issue #22138: Fix mock.patch behavior when patching descriptors. Restore
- original values after patching. Patch contributed by Sean McCully.
+- Issue #27706: Restore deterministic behavior of random.Random().seed()
+ for string seeds using seeding version 1. Allows sequences of calls
+ to random() to exactly match those obtained in Python 2.
+ Patch by Nofar Schnider.
-- Issue #25672: In the ssl module, enable the SSL_MODE_RELEASE_BUFFERS mode
- option if it is safe to do so.
+- Issue #10513: Fix a regression in Connection.commit(). Statements should
+ not be reset after a commit.
-- Issue #26012: Don't traverse into symlinks for ** pattern in
- pathlib.Path.[r]glob().
+- Issue #12319: Chunked transfer encoding support added to
+ http.client.HTTPConnection requests. The
+ urllib.request.AbstractHTTPHandler class does not enforce a Content-Length
+ header any more. If a HTTP request has a file or iterable body, but no
+ Content-Length header, the library now falls back to use chunked transfer-
+ encoding.
-- Issue #24120: Ignore PermissionError when traversing a tree with
- pathlib.Path.[r]glob(). Patch by Ulrich Petri.
+- A new version of typing.py from https://github.com/python/typing:
+ - Collection (only for 3.6) (Issue #27598)
+ - Add FrozenSet to __all__ (upstream #261)
+ - fix crash in _get_type_vars() (upstream #259)
+ - Remove the dict constraint in ForwardRef._eval_type (upstream #252)
-- Issue #25447: fileinput now uses sys.stdin as-is if it does not have a
- buffer attribute (restores backward compatibility).
+- Issue #27832: Make ``_normalize`` parameter to ``Fraction`` constuctor
+ keyword-only, so that ``Fraction(2, 3, 4)`` now raises ``TypeError``.
-- Issue #25447: Copying the lru_cache() wrapper object now always works,
- independedly from the type of the wrapped object (by returning the original
- object unchanged).
+- Issue #27539: Fix unnormalised ``Fraction.__pow__`` result in the case
+ of negative exponent and negative base.
-- Issue #24103: Fixed possible use after free in ElementTree.XMLPullParser.
+- Issue #21718: cursor.description is now available for queries using CTEs.
-- Issue #25860: os.fwalk() no longer skips remaining directories when error
- occurs. Original patch by Samson Lee.
+- Issue #27819: In distutils sdists, simply produce the "gztar" (gzipped tar
+ format) distributions on all platforms unless "formats" is supplied.
-- Issue #25914: Fixed and simplified OrderedDict.__sizeof__.
+- Issue #2466: posixpath.ismount now correctly recognizes mount points which
+ the user does not have permission to access.
-- Issue #25902: Fixed various refcount issues in ElementTree iteration.
+- Issue #9998: On Linux, ctypes.util.find_library now looks in LD_LIBRARY_PATH
+ for shared libraries.
-- Issue #25717: Restore the previous behaviour of tolerating most fstat()
- errors when opening files. This was a regression in 3.5a1, and stopped
- anonymous temporary files from working in special cases.
+- Issue #27573: exit message for code.interact is now configurable.
-- Issue #24903: Fix regression in number of arguments compileall accepts when
- '-d' is specified. The check on the number of arguments has been dropped
- completely as it never worked correctly anyway.
+- Issue #27930: Improved behaviour of logging.handlers.QueueListener.
+ Thanks to Paulo Andrade and Petr Viktorin for the analysis and patch.
-- Issue #25764: In the subprocess module, preserve any exception caused by
- fork() failure when preexec_fn is used.
+- Issue #6766: Distributed reference counting added to multiprocessing
+ to support nesting of shared values / proxy objects.
-- Issue #6478: _strptime's regexp cache now is reset after changing timezone
- with time.tzset().
+- Issue #21201: Improves readability of multiprocessing error message. Thanks
+ to Wojciech Walczak for patch.
-- Issue #14285: When executing a package with the "python -m package" option,
- and package initialization fails, a proper traceback is now reported. The
- "runpy" module now lets exceptions from package initialization pass back to
- the caller, rather than raising ImportError.
+- asyncio: Add set_protocol / get_protocol to Transports.
-- Issue #19771: Also in runpy and the "-m" option, omit the irrelevant
- message ". . . is a package and cannot be directly executed" if the package
- could not even be initialized (e.g. due to a bad ``*.pyc`` file).
+- Issue #27456: asyncio: Set TCP_NODELAY by default.
-- Issue #25177: Fixed problem with the mean of very small and very large
- numbers. As a side effect, statistics.mean and statistics.variance should
- be significantly faster.
+IDLE
+----
-- Issue #25718: Fixed copying object with state with boolean value is false.
+- Issue #15308: Add 'interrupt execution' (^C) to Shell menu.
+ Patch by Roger Serwy, updated by Bayard Randel.
-- Issue #10131: Fixed deep copying of minidom documents. Based on patch
- by Marian Ganisin.
+- Issue #27922: Stop IDLE tests from 'flashing' gui widgets on the screen.
-- Issue #25725: Fixed a reference leak in pickle.loads() when unpickling
- invalid data including tuple instructions.
+- Issue #27891: Consistently group and sort imports within idlelib modules.
-- Issue #25663: In the Readline completer, avoid listing duplicate global
- names, and search the global namespace before searching builtins.
+- Issue #17642: add larger font sizes for classroom projection.
-- Issue #25688: Fixed file leak in ElementTree.iterparse() raising an error.
+- Add version to title of IDLE help window.
-- Issue #23914: Fixed SystemError raised by unpickler on broken pickle data.
+- Issue #25564: In section on IDLE -- console differences, mention that
+ using exec means that __builtins__ is defined for each statement.
-- Issue #25691: Fixed crash on deleting ElementTree.Element attributes.
+- Issue #27821: Fix 3.6.0a3 regression that prevented custom key sets
+ from being selected when no custom theme was defined.
-- Issue #25624: ZipFile now always writes a ZIP_STORED header for directory
- entries. Patch by Dingyuan Wang.
+C API
+-----
-- Skip getaddrinfo if host is already resolved.
- Patch by A. Jesse Jiryu Davis.
+- Issue #26900: Excluded underscored names and other private API from limited API.
-- Issue #26050: Add asyncio.StreamReader.readuntil() method.
- Patch by Марк Коренберг.
+- Issue #26027: Add support for path-like objects in PyUnicode_FSConverter() &
+ PyUnicode_FSDecoder().
-- Issue #25924: Avoid unnecessary serialization of getaddrinfo(3) calls on
- OS X versions 10.5 or higher. Original patch by A. Jesse Jiryu Davis.
+Tests
+-----
-- Issue #26406: Avoid unnecessary serialization of getaddrinfo(3) calls on
- current versions of OpenBSD and NetBSD. Patch by A. Jesse Jiryu Davis.
+- Issue #27427: Additional tests for the math module. Patch by Francisco Couzo.
-- Issue #26848: Fix asyncio/subprocess.communicate() to handle empty input.
- Patch by Jack O'Connor.
+- Issue #27953: Skip math and cmath tests that fail on OS X 10.4 due to a
+ poor libm implementation of tan.
-- Issue #27040: Add loop.get_exception_handler method
+- Issue #26040: Improve test_math and test_cmath coverage and rigour. Patch by
+ Jeff Allen.
-- Issue #27041: asyncio: Add loop.create_future method
+- Issue #27787: Call gc.collect() before checking each test for "dangling
+ threads", since the dangling threads are weak references.
-- Issue #27223: asyncio: Fix _read_ready and _write_ready to respect
- _conn_lost.
- Patch by Łukasz Langa.
+Build
+-----
-- Issue #22970: asyncio: Fix inconsistency cancelling Condition.wait.
- Patch by David Coles.
+- Issue #27566: Fix clean target in freeze makefile (patch by Lisa Roach)
-IDLE
-----
+- Issue #27705: Update message in validate_ucrtbase.py
-- Issue #5124: Paste with text selected now replaces the selection on X11.
- This matches how paste works on Windows, Mac, most modern Linux apps,
- and ttk widgets. Original patch by Serhiy Storchaka.
+- Issue #27976: Deprecate building _ctypes with the bundled copy of libffi on
+ non-OSX UNIX platforms.
-- Issue #24759: Make clear in idlelib.idle_test.__init__ that the directory
- is a private implementation of test.test_idle and tool for maintainers.
+- Issue #27983: Cause lack of llvm-profdata tool when using clang as
+ required for PGO linking to be a configure time error rather than
+ make time when --with-optimizations is enabled. Also improve our
+ ability to find the llvm-profdata tool on MacOS and some Linuxes.
-- Issue #27196: Stop 'ThemeChanged' warnings when running IDLE tests.
- These persisted after other warnings were suppressed in #20567.
- Apply Serhiy Storchaka's update_idletasks solution to four test files.
- Record this additional advice in idle_test/README.txt
+- Issue #21590: Support for DTrace and SystemTap probes.
-- Issue #20567: Revise idle_test/README.txt with advice about avoiding
- tk warning messages from tests. Apply advice to several IDLE tests.
+- Issue #26307: The profile-opt build now applies PGO to the built-in modules.
-- Issue #27117: Make colorizer htest and turtledemo work with dark themes.
- Move code for configuring text widget colors to a new function.
+- Issue #26539: Add the --with-optimizations flag to turn on LTO and PGO build
+ support when available.
-- Issue #26673: When tk reports font size as 0, change to size 10.
- Such fonts on Linux prevented the configuration dialog from opening.
+- Issue #27917: Set platform triplets for Android builds.
-- Issue #21939: Add test for IDLE's percolator.
- Original patch by Saimadhav Heblikar.
+- Issue #25825: Update references to the $(LIBPL) installation path on AIX.
+ This path was changed in 3.2a4.
-- Issue #21676: Add test for IDLE's replace dialog.
- Original patch by Saimadhav Heblikar.
+- Update OS X installer to use SQLite 3.14.1 and XZ 5.2.2.
-- Issue #18410: Add test for IDLE's search dialog.
- Original patch by Westley Martínez.
+- Issue #21122: Fix LTO builds on OS X.
-- Issue #21703: Add test for IDLE's undo delegator.
- Original patch by Saimadhav Heblikar .
+- Issue #17128: Build OS X installer with a private copy of OpenSSL.
+ Also provide a sample Install Certificates command script to install a
+ set of root certificates from the third-party certifi module.
-- Issue #27044: Add ConfigDialog.remove_var_callbacks to stop memory leaks.
+Tools/Demos
+-----------
-- Issue #23977: Add more asserts to test_delegator.
+- Issue #27952: Get Tools/scripts/fixcid.py working with Python 3 and the
+ current "re" module, avoid invalid Python backslash escapes, and fix a bug
+ parsing escaped C quote signs.
-- Issue #20640: Add tests for idlelib.configHelpSourceEdit.
- Patch by Saimadhav Heblikar.
+Windows
+-------
-- In the 'IDLE-console differences' section of the IDLE doc, clarify
- how running with IDLE affects sys.modules and the standard streams.
+- Issue #28065: Update xz dependency to 5.2.2 and build it from source.
-- Issue #25507: fix incorrect change in IOBinding that prevented printing.
- Augment IOBinding htest to include all major IOBinding functions.
+- Issue #25144: Ensures TargetDir is set before continuing with custom
+ install.
-- Issue #25905: Revert unwanted conversion of ' to ’ RIGHT SINGLE QUOTATION
- MARK in README.txt and open this and NEWS.txt with 'ascii'.
- Re-encode CREDITS.txt to utf-8 and open it with 'utf-8'.
+- Issue #1602: Windows console doesn't input or print Unicode (PEP 528)
-Documentation
--------------
+- Issue #27781: Change file system encoding on Windows to UTF-8 (PEP 529)
-- Issue #19489: Moved the search box from the sidebar to the header and footer
- of each page. Patch by Ammar Askar.
+- Issue #27731: Opt-out of MAX_PATH on Windows 10
-- Issue #24136: Document the new PEP 448 unpacking syntax of 3.5.
+- Issue #6135: Adds encoding and errors parameters to subprocess.
-- Issue #26736: Used HTTPS for external links in the documentation if possible.
+- Issue #27959: Adds oem encoding, alias ansi to mbcs, move aliasmbcs to
+ codec lookup.
-- Issue #6953: Rework the Readline module documentation to group related
- functions together, and add more details such as what underlying Readline
- functions and variables are accessed.
+- Issue #27982: The functions of the winsound module now accept keyword
+ arguments.
-- Issue #23606: Adds note to ctypes documentation regarding cdll.msvcrt.
+- Issue #20366: Build full text search support into SQLite on Windows.
-- Issue #25500: Fix documentation to not claim that __import__ is searched for
- in the global scope.
+- Issue #27756: Adds new icons for Python files and processes on Windows.
+ Designs by Cherry Wang.
-- Issue #26014: Update 3.x packaging documentation:
- * "See also" links to the new docs are now provided in the legacy pages
- * links to setuptools documentation have been updated
+- Issue #27883: Update sqlite to 3.14.1.0 on Windows.
-Tests
------
-- Issue #21916: Added tests for the turtle module. Patch by ingrid,
- Gregory Loyse and Jelle Zijlstra.
+What's New in Python 3.6.0 alpha 4?
+===================================
-- Issue #26523: The multiprocessing thread pool (multiprocessing.dummy.Pool)
- was untested.
+*Release date: 2016-08-15*
-- Issue #26015: Added new tests for pickling iterators of mutable sequences.
+Core and Builtins
+-----------------
-- Issue #26325: Added test.support.check_no_resource_warning() to check that
- no ResourceWarning is emitted.
+- Issue #27704: Optimized creating bytes and bytearray from byte-like objects
+ and iterables. Speed up to 3 times for short objects. Original patch by
+ Naoki Inada.
-- Issue #25940: Changed test_ssl to use self-signed.pythontest.net. This
- avoids relying on svn.python.org, which recently changed root certificate.
+- Issue #26823: Large sections of repeated lines in tracebacks are now
+ abbreviated as "[Previous line repeated {count} more times]" by the builtin
+ traceback rendering. Patch by Emanuel Barry.
-- Issue #25616: Tests for OrderedDict are extracted from test_collections
- into separate file test_ordered_dict.
+- Issue #27574: Decreased an overhead of parsing keyword arguments in functions
+ implemented with using Argument Clinic.
-- Issue #26583: Skip test_timestamp_overflow in test_import if bytecode
- files cannot be written.
+- Issue #22557: Now importing already imported modules is up to 2.5 times
+ faster.
-Build
------
+- Issue #17596: Include <wincrypt.h> to help with Min GW building.
-- Issue #26884: Fix linking extension modules for cross builds.
- Patch by Xavier de Gaye.
+- Issue #17599: On Windows, rename the privately defined REPARSE_DATA_BUFFER
+ structure to avoid conflicting with the definition from Min GW.
-- Issue #22359: Disable the rules for running _freeze_importlib and pgen when
- cross-compiling. The output of these programs is normally saved with the
- source code anyway, and is still regenerated when doing a native build.
- Patch by Xavier de Gaye.
+- Issue #27507: Add integer overflow check in bytearray.extend(). Patch by
+ Xiang Zhang.
-- Issue #27229: Fix the cross-compiling pgen rule for in-tree builds. Patch
- by Xavier de Gaye.
+- Issue #27581: Don't rely on wrapping for overflow check in
+ PySequence_Tuple(). Patch by Xiang Zhang.
-- Issue #21668: Link audioop, _datetime, _ctypes_test modules to libm,
- except on Mac OS X. Patch written by Xavier de Gaye.
+- Issue #1621: Avoid signed integer overflow in list and tuple operations.
+ Patch by Xiang Zhang.
-- Issue #25702: A --with-lto configure option has been added that will
- enable link time optimizations at build time during a make profile-opt.
- Some compilers and toolchains are known to not produce stable code when
- using LTO, be sure to test things thoroughly before relying on it.
- It can provide a few % speed up over profile-opt alone.
+- Issue #27419: Standard __import__() no longer look up "__import__" in globals
+ or builtins for importing submodules or "from import". Fixed a crash if
+ raise a warning about unabling to resolve package from __spec__ or
+ __package__.
-- Issue #26624: Adds validation of ucrtbase[d].dll version with warning
- for old versions.
+- Issue #27083: Respect the PYTHONCASEOK environment variable under Windows.
-- Issue #17603: Avoid error about nonexistant fileblocks.o file by using a
- lower-level check for st_blocks in struct stat.
+- Issue #27514: Make having too many statically nested blocks a SyntaxError
+ instead of SystemError.
-- Issue #26079: Fixing the build output folder for tix-8.4.3.6. Patch by
- Bjoern Thiel.
+- Issue #27366: Implemented PEP 487 (Simpler customization of class creation).
+ Upon subclassing, the __init_subclass__ classmethod is called on the base
+ class. Descriptors are initialized with __set_name__ after class creation.
-- Issue #26465: Update Windows builds to use OpenSSL 1.0.2g.
+Library
+-------
-- Issue #24421: Compile Modules/_math.c once, before building extensions.
- Previously it could fail to compile properly if the math and cmath builds
- were concurrent.
+- Issue #26027, #27524: Add PEP 519/__fspath__() support to the os and os.path
+ modules. Includes code from Jelle Zijlstra.
-- Issue #25348: Added ``--pgo`` and ``--pgo-job`` arguments to
- ``PCbuild\build.bat`` for building with Profile-Guided Optimization. The
- old ``PCbuild\build_pgo.bat`` script is now deprecated, and simply calls
- ``PCbuild\build.bat --pgo %*``.
+- Issue #27598: Add Collections to collections.abc.
+ Patch by Ivan Levkivskyi, docs by Neil Girdhar.
-- Issue #25827: Add support for building with ICC to ``configure``, including
- a new ``--with-icc`` flag.
+- Issue #25958: Support "anti-registration" of special methods from
+ various ABCs, like __hash__, __iter__ or __len__. All these (and
+ several more) can be set to None in an implementation class and the
+ behavior will be as if the method is not defined at all.
+ (Previously, this mechanism existed only for __hash__, to make
+ mutable classes unhashable.) Code contributed by Andrew Barnert and
+ Ivan Levkivskyi.
-- Issue #25696: Fix installation of Python on UNIX with make -j9.
+- Issue #16764: Support keyword arguments to zlib.decompress(). Patch by
+ Xiang Zhang.
-- Issue #26930: Update OS X 10.5+ 32-bit-only installer to build
- and link with OpenSSL 1.0.2h.
+- Issue #27736: Prevent segfault after interpreter re-initialization due
+ to ref count problem introduced in code for Issue #27038 in 3.6.0a3.
+ Patch by Xiang Zhang.
-- Issue #26268: Update Windows builds to use OpenSSL 1.0.2f.
+- Issue #25628: The *verbose* and *rename* parameters for
+ collections.namedtuple are now keyword-only.
-- Issue #25136: Support Apple Xcode 7's new textual SDK stub libraries.
+- Issue #12345: Add mathematical constant tau to math and cmath. See also
+ PEP 628.
-- Issue #24324: Do not enable unreachable code warnings when using
- gcc as the option does not work correctly in older versions of gcc
- and has been silently removed as of gcc-4.5.
+- Issue #26823: traceback.StackSummary.format now abbreviates large sections of
+ repeated lines as "[Previous line repeated {count} more times]" (this change
+ then further affects other traceback display operations in the module). Patch
+ by Emanuel Barry.
-Windows
--------
+- Issue #27664: Add to concurrent.futures.thread.ThreadPoolExecutor()
+ the ability to specify a thread name prefix.
-- Issue #27053: Updates make_zip.py to correctly generate library ZIP file.
+- Issue #27181: Add geometric_mean and harmonic_mean to statistics module.
-- Issue #26268: Update the prepare_ssl.py script to handle OpenSSL releases
- that don't include the contents of the include directory (that is, 1.0.2e
- and later).
+- Issue #27573: code.interact now prints an message when exiting.
-- Issue #26071: bdist_wininst created binaries fail to start and find
- 32bit Python
+- Issue #6422: Add autorange method to timeit.Timer objects.
-- Issue #26073: Update the list of magic numbers in launcher
+- Issue #27773: Correct some memory management errors server_hostname in
+ _ssl.wrap_socket().
-- Issue #26065: Excludes venv from library when generating embeddable
- distro.
+- Issue #26750: unittest.mock.create_autospec() now works properly for
+ subclasses of property() and other data descriptors. Removes the never
+ publicly used, never documented unittest.mock.DescriptorTypes tuple.
-Tools/Demos
------------
+- Issue #26754: Undocumented support of general bytes-like objects
+ as path in compile() and similar functions is now deprecated.
-- Issue #26799: Fix python-gdb.py: don't get C types once when the Python code
- is loaded, but get C types on demand. The C types can change if
- python-gdb.py is loaded before the Python executable. Patch written by Thomas
- Ilsche.
+- Issue #26800: Undocumented support of general bytes-like objects
+ as paths in os functions is now deprecated.
-- Issue #26271: Fix the Freeze tool to properly use flags passed through
- configure. Patch by Daniel Shaulov.
+- Issue #26981: Add _order_ compatibility shim to enum.Enum for
+ Python 2/3 code bases.
-- Issue #26489: Add dictionary unpacking support to Tools/parser/unparse.py.
- Patch by Guo Ci Teo.
+- Issue #27661: Added tzinfo keyword argument to datetime.combine.
-- Issue #26316: Fix variable name typo in Argument Clinic.
+- In the curses module, raise an error if window.getstr() or window.instr() is
+ passed a negative value.
-Misc
-----
+- Issue #27783: Fix possible usage of uninitialized memory in
+ operator.methodcaller.
-- Issue #17500, and https://github.com/python/pythondotorg/issues/945: Remove
- unused and outdated icons.
+- Issue #27774: Fix possible Py_DECREF on unowned object in _sre.
+- Issue #27760: Fix possible integer overflow in binascii.b2a_qp.
-What's New in Python 3.5.1 final?
-=================================
+- Issue #27758: Fix possible integer overflow in the _csv module for large
+ record lengths.
-Release date: 2015-12-06
+- Issue #27568: Prevent HTTPoxy attack (CVE-2016-1000110). Ignore the
+ HTTP_PROXY variable when REQUEST_METHOD environment is set, which indicates
+ that the script is in CGI mode.
-Core and Builtins
------------------
+- Issue #7063: Remove dead code from the "array" module's slice handling.
+ Patch by Chuck.
-- Issue #25709: Fixed problem with in-place string concatenation and
- utf-8 cache.
+- Issue #27656: Do not assume sched.h defines any SCHED_* constants.
-Windows
--------
+- Issue #27130: In the "zlib" module, fix handling of large buffers
+ (typically 4 GiB) when compressing and decompressing. Previously, inputs
+ were limited to 4 GiB, and compression and decompression operations did not
+ properly handle results of 4 GiB.
-- Issue #25715: Python 3.5.1 installer shows wrong upgrade path and incorrect
- logic for launcher detection.
+- Issue #24773: Implemented PEP 495 (Local Time Disambiguation).
+- Expose the EPOLLEXCLUSIVE constant (when it is defined) in the select module.
-What's New in Python 3.5.1 release candidate 1?
-===============================================
+- Issue #27567: Expose the EPOLLRDHUP and POLLRDHUP constants in the select
+ module.
-Release date: 2015-11-22
+- Issue #1621: Avoid signed int negation overflow in the "audioop" module.
-Core and Builtins
------------------
+- Issue #27533: Release GIL in nt._isdir
-- Issue #25630: Fix a possible segfault during argument parsing in functions
- that accept filesystem paths.
+- Issue #17711: Fixed unpickling by the persistent ID with protocol 0.
+ Original patch by Alexandre Vassalotti.
-- Issue #23564: Fixed a partially broken sanity check in the _posixsubprocess
- internals regarding how fds_to_pass were passed to the child. The bug had
- no actual impact as subprocess.py already avoided it.
+- Issue #27522: Avoid an unintentional reference cycle in email.feedparser.
-- Issue #25388: Fixed tokenizer crash when processing undecodable source code
- with a null byte.
+- Issue #27512: Fix a segfault when os.fspath() called an __fspath__() method
+ that raised an exception. Patch by Xiang Zhang.
-- Issue #25462: The hash of the key now is calculated only once in most
- operations in C implementation of OrderedDict.
+IDLE
+----
-- Issue #22995: Default implementation of __reduce__ and __reduce_ex__ now
- rejects builtin types with not defined __new__.
+- Issue #27714: text_textview and test_autocomplete now pass when re-run
+ in the same process. This occurs when test_idle fails when run with the
+ -w option but without -jn. Fix warning from test_config.
-- Issue #25555: Fix parser and AST: fill lineno and col_offset of "arg" node
- when compiling AST from Python objects.
+- Issue #27621: Put query response validation error messages in the query
+ box itself instead of in a separate massagebox. Redo tests to match.
+ Add Mac OSX refinements. Original patch by Mark Roseman.
-- Issue #24802: Avoid buffer overreads when int(), float(), compile(), exec()
- and eval() are passed bytes-like objects. These objects are not
- necessarily terminated by a null byte, but the functions assumed they were.
+- Issue #27620: Escape key now closes Query box as cancelled.
-- Issue #24726: Fixed a crash and leaking NULL in repr() of OrderedDict that
- was mutated by direct calls of dict methods.
+- Issue #27609: IDLE: tab after initial whitespace should tab, not
+ autocomplete. This fixes problem with writing docstrings at least
+ twice indented.
-- Issue #25449: Iterating OrderedDict with keys with unstable hash now raises
- KeyError in C implementations as well as in Python implementation.
+- Issue #27609: Explicitly return None when there are also non-None
+ returns. In a few cases, reverse a condition and eliminate a return.
-- Issue #25395: Fixed crash when highly nested OrderedDict structures were
- garbage collected.
+- Issue #25507: IDLE no longer runs buggy code because of its tkinter imports.
+ Users must include the same imports required to run directly in Python.
-- Issue #25274: sys.setrecursionlimit() now raises a RecursionError if the new
- recursion limit is too low depending at the current recursion depth. Modify
- also the "lower-water mark" formula to make it monotonic. This mark is used
- to decide when the overflowed flag of the thread state is reset.
+- Issue #27173: Add 'IDLE Modern Unix' to the built-in key sets.
+ Make the default key set depend on the platform.
+ Add tests for the changes to the config module.
-- Issue #24402: Fix input() to prompt to the redirected stdout when
- sys.stdout.fileno() fails.
+- Issue #27452: add line counter and crc to IDLE configHandler test dump.
-- Issue #24806: Prevent builtin types that are not allowed to be subclassed from
- being subclassed through multiple inheritance.
+Tests
+-----
-- Issue #24848: Fixed a number of bugs in UTF-7 decoding of misformed data.
+- Issue #25805: Skip a test in test_pkgutil as needed that doesn't work when
+ ``__name__ == __main__``. Patch by SilentGhost.
-- Issue #25280: Import trace messages emitted in verbose (-v) mode are no
- longer formatted twice.
+- Issue #27472: Add test.support.unix_shell as the path to the default shell.
-- Issue #25003: On Solaris 11.3 or newer, os.urandom() now uses the
- getrandom() function instead of the getentropy() function. The getentropy()
- function is blocking to generate very good quality entropy, os.urandom()
- doesn't need such high-quality entropy.
+- Issue #27369: In test_pyexpat, avoid testing an error message detail that
+ changed in Expat 2.2.0.
-- Issue #25182: The stdprinter (used as sys.stderr before the io module is
- imported at startup) now uses the backslashreplace error handler.
+- Issue #27594: Prevent assertion error when running test_ast with coverage
+ enabled: ensure code object has a valid first line number.
+ Patch suggested by Ivan Levkivskyi.
-- Issue #25131: Make the line number and column offset of set/dict literals and
- comprehensions correspond to the opening brace.
+Windows
+-------
-- Issue #25150: Hide the private _Py_atomic_xxx symbols from the public
- Python.h header to fix a compilation error with OpenMP. PyThreadState_GET()
- becomes an alias to PyThreadState_Get() to avoid ABI incompatibilies.
+- Issue #27647: Update bundled Tcl/Tk to 8.6.6.
-Library
--------
+- Issue #27610: Adds PEP 514 metadata to Windows installer
-- Issue #25626: Change three zlib functions to accept sizes that fit in
- Py_ssize_t, but internally cap those sizes to UINT_MAX. This resolves a
- regression in 3.5 where GzipFile.read() failed to read chunks larger than 2
- or 4 GiB. The change affects the zlib.Decompress.decompress() max_length
- parameter, the zlib.decompress() bufsize parameter, and the
- zlib.Decompress.flush() length parameter.
+- Issue #27469: Adds a shell extension to the launcher so that drag and drop
+ works correctly.
-- Issue #25583: Avoid incorrect errors raised by os.makedirs(exist_ok=True)
- when the OS gives priority to errors such as EACCES over EEXIST.
+- Issue #27309: Enables proper Windows styles in python[w].exe manifest.
-- Issue #25593: Change semantics of EventLoop.stop() in asyncio.
+Build
+-----
-- Issue #6973: When we know a subprocess.Popen process has died, do
- not allow the send_signal(), terminate(), or kill() methods to do
- anything as they could potentially signal a different process.
+- Issue #27713: Suppress spurious build warnings when updating importlib's
+ bootstrap files. Patch by Xiang Zhang
-- Issue #25590: In the Readline completer, only call getattr() once per
- attribute.
+- Issue #25825: Correct the references to Modules/python.exp, which is
+ required on AIX. The references were accidentally changed in 3.5.0a1.
-- Issue #25498: Fix a crash when garbage-collecting ctypes objects created
- by wrapping a memoryview. This was a regression made in 3.5a1. Based
- on patch by Eryksun.
+- Issue #27453: CPP invocation in configure must use CPPFLAGS. Patch by
+ Chi Hsuan Yen.
-- Issue #25584: Added "escape" to the __all__ list in the glob module.
+- Issue #27641: The configure script now inserts comments into the makefile
+ to prevent the pgen and _freeze_importlib executables from being cross-
+ compiled.
-- Issue #25584: Fixed recursive glob() with patterns starting with '\*\*'.
+- Issue #26662: Set PYTHON_FOR_GEN in configure as the Python program to be
+ used for file generation during the build.
-- Issue #25446: Fix regression in smtplib's AUTH LOGIN support.
+- Issue #10910: Avoid C++ compilation errors on FreeBSD and OS X.
+ Also update FreedBSD version checks for the original ctype UTF-8 workaround.
-- Issue #18010: Fix the pydoc web server's module search function to handle
- exceptions from importing packages.
-- Issue #25554: Got rid of circular references in regular expression parsing.
+What's New in Python 3.6.0 alpha 3?
+===================================
-- Issue #25510: fileinput.FileInput.readline() now returns b'' instead of ''
- at the end if the FileInput was opened with binary mode.
- Patch by Ryosuke Ito.
+*Release date: 2016-07-11*
-- Issue #25503: Fixed inspect.getdoc() for inherited docstrings of properties.
- Original patch by John Mark Vandenberg.
+Core and Builtins
+-----------------
-- Issue #25515: Always use os.urandom as a source of randomness in uuid.uuid4.
+- Issue #27473: Fixed possible integer overflow in bytes and bytearray
+ concatenations. Patch by Xiang Zhang.
-- Issue #21827: Fixed textwrap.dedent() for the case when largest common
- whitespace is a substring of smallest leading whitespace.
- Based on patch by Robert Li.
+- Issue #23034: The output of a special Python build with defined COUNT_ALLOCS,
+ SHOW_ALLOC_COUNT or SHOW_TRACK_COUNT macros is now off by default. It can
+ be re-enabled using the "-X showalloccount" option. It now outputs to stderr
+ instead of stdout.
-- Issue #25447: The lru_cache() wrapper objects now can be copied and pickled
- (by returning the original object unchanged).
+- Issue #27443: __length_hint__() of bytearray iterators no longer return a
+ negative integer for a resized bytearray.
-- Issue #25390: typing: Don't crash on Union[str, Pattern].
+- Issue #27007: The fromhex() class methods of bytes and bytearray subclasses
+ now return an instance of corresponding subclass.
-- Issue #25441: asyncio: Raise error from drain() when socket is closed.
+Library
+-------
-- Issue #25410: Cleaned up and fixed minor bugs in C implementation of
- OrderedDict.
+- Issue #26844: Fix error message for imp.find_module() to refer to 'path'
+ instead of 'name'. Patch by Lev Maximov.
-- Issue #25411: Improved Unicode support in SMTPHandler through better use of
- the email package. Thanks to user simon04 for the patch.
+- Issue #23804: Fix SSL zero-length recv() calls to not block and not raise
+ an error about unclean EOF.
-- Issue #25407: Remove mentions of the formatter module being removed in
- Python 3.6.
+- Issue #27466: Change time format returned by http.cookie.time2netscape,
+ confirming the netscape cookie format and making it consistent with
+ documentation.
-- Issue #25406: Fixed a bug in C implementation of OrderedDict.move_to_end()
- that caused segmentation fault or hang in iterating after moving several
- items to the start of ordered dict.
+- Issue #21708: Deprecated dbm.dumb behavior that differs from common dbm
+ behavior: creating a database in 'r' and 'w' modes and modifying a database
+ in 'r' mode.
-- Issue #25364: zipfile now works in threads disabled builds.
+- Issue #26721: Change the socketserver.StreamRequestHandler.wfile attribute
+ to implement BufferedIOBase. In particular, the write() method no longer
+ does partial writes.
-- Issue #25328: smtpd's SMTPChannel now correctly raises a ValueError if both
- decode_data and enable_SMTPUTF8 are set to true.
+- Issue #22115: Added methods trace_add, trace_remove and trace_info in the
+ tkinter.Variable class. They replace old methods trace_variable, trace,
+ trace_vdelete and trace_vinfo that use obsolete Tcl commands and might
+ not work in future versions of Tcl. Fixed old tracing methods:
+ trace_vdelete() with wrong mode no longer break tracing, trace_vinfo() now
+ always returns a list of pairs of strings, tracing in the "u" mode now works.
-- Issue #25316: distutils raises OSError instead of DistutilsPlatformError
- when MSVC is not installed.
+- Issue #26243: Only the level argument to zlib.compress() is keyword argument
+ now. The first argument is positional-only.
-- Issue #25380: Fixed protocol for the STACK_GLOBAL opcode in
- pickletools.opcodes.
+- Issue #27038: Expose the DirEntry type as os.DirEntry. Code patch by
+ Jelle Zijlstra.
-- Issue #23972: Updates asyncio datagram create method allowing reuseport
- and reuseaddr socket options to be set prior to binding the socket.
- Mirroring the existing asyncio create_server method the reuseaddr option
- for datagram sockets defaults to True if the O/S is 'posix' (except if the
- platform is Cygwin). Patch by Chris Laws.
+- Issue #27186: Update os.fspath()/PyOS_FSPath() to check the return value of
+ __fspath__() to be either str or bytes.
-- Issue #25304: Add asyncio.run_coroutine_threadsafe(). This lets you
- submit a coroutine to a loop from another thread, returning a
- concurrent.futures.Future. By Vincent Michel.
+- Issue #18726: All optional parameters of the dump(), dumps(),
+ load() and loads() functions and JSONEncoder and JSONDecoder class
+ constructors in the json module are now keyword-only.
-- Issue #25232: Fix CGIRequestHandler to split the query from the URL at the
- first question mark (?) rather than the last. Patch from Xiang Zhang.
+- Issue #27319: Methods selection_set(), selection_add(), selection_remove()
+ and selection_toggle() of ttk.TreeView now allow passing multiple items as
+ multiple arguments instead of passing them as a tuple. Deprecated
+ undocumented ability of calling the selection() method with arguments.
-- Issue #24657: Prevent CGIRequestHandler from collapsing slashes in the
- query part of the URL as if it were a path. Patch from Xiang Zhang.
+- Issue #27079: Fixed curses.ascii functions isblank(), iscntrl() and ispunct().
-- Issue #24483: C implementation of functools.lru_cache() now calculates key's
- hash only once.
+- Issue #27294: Numerical state in the repr for Tkinter event objects is now
+ represented as a combination of known flags.
-- Issue #22958: Constructor and update method of weakref.WeakValueDictionary
- now accept the self and the dict keyword arguments.
+- Issue #27177: Match objects in the re module now support index-like objects
+ as group indices. Based on patches by Jeroen Demeyer and Xiang Zhang.
-- Issue #22609: Constructor of collections.UserDict now accepts the self keyword
- argument.
+- Issue #26754: Some functions (compile() etc) accepted a filename argument
+ encoded as an iterable of integers. Now only strings and byte-like objects
+ are accepted.
-- Issue #25111: Fixed comparison of traceback.FrameSummary.
+- Issue #26536: socket.ioctl now supports SIO_LOOPBACK_FAST_PATH. Patch by
+ Daniel Stokes.
-- Issue #25262: Added support for BINBYTES8 opcode in Python implementation of
- unpickler. Highest 32 bits of 64-bit size for BINUNICODE8 and BINBYTES8
- opcodes no longer silently ignored on 32-bit platforms in C implementation.
+- Issue #27048: Prevents distutils failing on Windows when environment
+ variables contain non-ASCII characters
-- Issue #25034: Fix string.Formatter problem with auto-numbering and
- nested format_specs. Patch by Anthon van der Neut.
+- Issue #27330: Fixed possible leaks in the ctypes module.
-- Issue #25233: Rewrite the guts of asyncio.Queue and
- asyncio.Semaphore to be more understandable and correct.
+- Issue #27238: Got rid of bare excepts in the turtle module. Original patch
+ by Jelle Zijlstra.
-- Issue #25203: Failed readline.set_completer_delims() no longer left the
- module in inconsistent state.
+- Issue #27122: When an exception is raised within the context being managed
+ by a contextlib.ExitStack() and one of the exit stack generators
+ catches and raises it in a chain, do not re-raise the original exception
+ when exiting, let the new chained one through. This avoids the PEP 479
+ bug described in issue25782.
-- Issue #23600: Default implementation of tzinfo.fromutc() was returning
- wrong results in some cases.
+- [Security] Issue #27278: Fix os.urandom() implementation using getrandom() on
+ Linux. Truncate size to INT_MAX and loop until we collected enough random
+ bytes, instead of casting a directly Py_ssize_t to int.
-- Issue #23329: Allow the ssl module to be built with older versions of
- LibreSSL.
+- Issue #16864: sqlite3.Cursor.lastrowid now supports REPLACE statement.
+ Initial patch by Alex LordThorsen.
-- Prevent overflow in _Unpickler_Read.
+- Issue #26386: Fixed ttk.TreeView selection operations with item id's
+ containing spaces.
-- Issue #25047: The XML encoding declaration written by Element Tree now
- respects the letter case given by the user. This restores the ability to
- write encoding names in uppercase like "UTF-8", which worked in Python 2.
+- Issue #8637: Honor a pager set by the env var MANPAGER (in preference to
+ one set by the env var PAGER).
-- Issue #25135: Make deque_clear() safer by emptying the deque before clearing.
- This helps avoid possible reentrancy issues.
+- [Security] Issue #22636: Avoid shell injection problems with
+ ctypes.util.find_library().
-- Issue #19143: platform module now reads Windows version from kernel32.dll to
- avoid compatibility shims.
+- Issue #16182: Fix various functions in the "readline" module to use the
+ locale encoding, and fix get_begidx() and get_endidx() to return code point
+ indexes.
-- Issue #25092: Fix datetime.strftime() failure when errno was already set to
- EINVAL.
+- Issue #27392: Add loop.connect_accepted_socket().
+ Patch by Jim Fulton.
-- Issue #23517: Fix rounding in fromtimestamp() and utcfromtimestamp() methods
- of datetime.datetime: microseconds are now rounded to nearest with ties
- going to nearest even integer (ROUND_HALF_EVEN), instead of being rounding
- towards minus infinity (ROUND_FLOOR). It's important that these methods use
- the same rounding mode than datetime.timedelta to keep the property:
- (datetime(1970,1,1) + timedelta(seconds=t)) == datetime.utcfromtimestamp(t).
- It also the rounding mode used by round(float) for example.
+IDLE
+----
-- Issue #25155: Fix datetime.datetime.now() and datetime.datetime.utcnow() on
- Windows to support date after year 2038. It was a regression introduced in
- Python 3.5.0.
+- Issue #27477: IDLE search dialogs now use ttk widgets.
-- Issue #25108: Omitted internal frames in traceback functions print_stack(),
- format_stack(), and extract_stack() called without arguments.
+- Issue #27173: Add 'IDLE Modern Unix' to the built-in key sets.
+ Make the default key set depend on the platform.
+ Add tests for the changes to the config module.
-- Issue #25118: Fix a regression of Python 3.5.0 in os.waitpid() on Windows.
+- Issue #27452: make command line "idle-test> python test_help.py" work.
+ __file__ is relative when python is started in the file's directory.
-- Issue #24684: socket.socket.getaddrinfo() now calls
- PyUnicode_AsEncodedString() instead of calling the encode() method of the
- host, to handle correctly custom string with an encode() method which doesn't
- return a byte string. The encoder of the IDNA codec is now called directly
- instead of calling the encode() method of the string.
+- Issue #27452: add line counter and crc to IDLE configHandler test dump.
-- Issue #25060: Correctly compute stack usage of the BUILD_MAP opcode.
+- Issue #27380: IDLE: add query.py with base Query dialog and ttk widgets.
+ Module had subclasses SectionName, ModuleName, and HelpSource, which are
+ used to get information from users by configdialog and file =>Load Module.
+ Each subclass has itw own validity checks. Using ModuleName allows users
+ to edit bad module names instead of starting over.
+ Add tests and delete the two files combined into the new one.
-- Issue #24857: Comparing call_args to a long sequence now correctly returns a
- boolean result instead of raising an exception. Patch by A Kaptur.
+- Issue #27372: Test_idle no longer changes the locale.
-- Issue #23144: Make sure that HTMLParser.feed() returns all the data, even
- when convert_charrefs is True.
+- Issue #27365: Allow non-ascii chars in IDLE NEWS.txt, for contributor names.
-- Issue #24982: shutil.make_archive() with the "zip" format now adds entries
- for directories (including empty directories) in ZIP file.
+- Issue #27245: IDLE: Cleanly delete custom themes and key bindings.
+ Previously, when IDLE was started from a console or by import, a cascade
+ of warnings was emitted. Patch by Serhiy Storchaka.
-- Issue #25019: Fixed a crash caused by setting non-string key of expat parser.
- Based on patch by John Leitch.
+- Issue #24137: Run IDLE, test_idle, and htest with tkinter default root
+ disabled. Fix code and tests that fail with this restriction. Fix htests to
+ not create a second and redundant root and mainloop.
-- Issue #16180: Exit pdb if file has syntax error, instead of trapping user
- in an infinite loop. Patch by Xavier de Gaye.
+- Issue #27310: Fix IDLE.app failure to launch on OS X due to vestigial import.
-- Issue #24891: Fix a race condition at Python startup if the file descriptor
- of stdin (0), stdout (1) or stderr (2) is closed while Python is creating
- sys.stdin, sys.stdout and sys.stderr objects. These attributes are now set
- to None if the creation of the object failed, instead of raising an OSError
- exception. Initial patch written by Marco Paolini.
-
-- Issue #24992: Fix error handling and a race condition (related to garbage
- collection) in collections.OrderedDict constructor.
+C API
+-----
-- Issue #24881: Fixed setting binary mode in Python implementation of FileIO
- on Windows and Cygwin. Patch from Akira Li.
+- Issue #26754: PyUnicode_FSDecoder() accepted a filename argument encoded as
+ an iterable of integers. Now only strings and byte-like objects are accepted.
-- Issue #25578: Fix (another) memory leak in SSLSocket.getpeercer().
+Build
+-----
-- Issue #25530: Disable the vulnerable SSLv3 protocol by default when creating
- ssl.SSLContext.
+- Issue #28066: Fix the logic that searches build directories for generated
+ include files when building outside the source tree.
-- Issue #25569: Fix memory leak in SSLSocket.getpeercert().
+- Issue #27442: Expose the Android API level that python was built against, in
+ sysconfig.get_config_vars() as 'ANDROID_API_LEVEL'.
-- Issue #25471: Sockets returned from accept() shouldn't appear to be
- nonblocking.
+- Issue #27434: The interpreter that runs the cross-build, found in PATH, must
+ now be of the same feature version (e.g. 3.6) as the source being built.
-- Issue #25319: When threading.Event is reinitialized, the underlying condition
- should use a regular lock rather than a recursive lock.
+- Issue #26930: Update Windows builds to use OpenSSL 1.0.2h.
-- Issue #21112: Fix regression in unittest.expectedFailure on subclasses.
- Patch from Berker Peksag.
+- Issue #23968: Rename the platform directory from plat-$(MACHDEP) to
+ plat-$(PLATFORM_TRIPLET).
+ Rename the config directory (LIBPL) from config-$(LDVERSION) to
+ config-$(LDVERSION)-$(PLATFORM_TRIPLET).
+ Install the platform specifc _sysconfigdata module into the platform
+ directory and rename it to include the ABIFLAGS.
-- Issue #24764: cgi.FieldStorage.read_multi() now ignores the Content-Length
- header in part headers. Patch written by Peter Landry and reviewed by Pierre
- Quentel.
+- Don't use largefile support for GNU/Hurd.
-- Issue #24913: Fix overrun error in deque.index().
- Found by John Leitch and Bryce Darling.
+Tools/Demos
+-----------
-- Issue #24774: Fix docstring in http.server.test. Patch from Chiu-Hsiang Hsu.
+- Issue #27332: Fixed the type of the first argument of module-level functions
+ generated by Argument Clinic. Patch by Petr Viktorin.
-- Issue #21159: Improve message in configparser.InterpolationMissingOptionError.
- Patch from Łukasz Langa.
+- Issue #27418: Fixed Tools/importbench/importbench.py.
-- Issue #20362: Honour TestCase.longMessage correctly in assertRegex.
- Patch from Ilia Kurenkov.
+Documentation
+-------------
-- Issue #23572: Fixed functools.singledispatch on classes with falsy
- metaclasses. Patch by Ethan Furman.
+- Issue #19489: Moved the search box from the sidebar to the header and footer
+ of each page. Patch by Ammar Askar.
-- asyncio: ensure_future() now accepts awaitable objects.
+- Issue #27285: Update documentation to reflect the deprecation of ``pyvenv``
+ and normalize on the term "virtual environment". Patch by Steve Piercy.
-IDLE
-----
+Tests
+-----
-- Issue #15348: Stop the debugger engine (normally in a user process)
- before closing the debugger window (running in the IDLE process).
- This prevents the RuntimeErrors that were being caught and ignored.
+- Issue #27027: Added test.support.is_android that is True when this is an
+ Android build.
-- Issue #24455: Prevent IDLE from hanging when a) closing the shell while the
- debugger is active (15347); b) closing the debugger with the [X] button
- (15348); and c) activating the debugger when already active (24455).
- The patch by Mark Roseman does this by making two changes.
- 1. Suspend and resume the gui.interaction method with the tcl vwait
- mechanism intended for this purpose (instead of root.mainloop & .quit).
- 2. In gui.run, allow any existing interaction to terminate first.
-- Change 'The program' to 'Your program' in an IDLE 'kill program?' message
- to make it clearer that the program referred to is the currently running
- user program, not IDLE itself.
+What's New in Python 3.6.0 alpha 2?
+===================================
-- Issue #24750: Improve the appearance of the IDLE editor window status bar.
- Patch by Mark Roseman.
+*Release date: 2016-06-13*
-- Issue #25313: Change the handling of new built-in text color themes to better
- address the compatibility problem introduced by the addition of IDLE Dark.
- Consistently use the revised idleConf.CurrentTheme everywhere in idlelib.
+Core and Builtins
+-----------------
-- Issue #24782: Extension configuration is now a tab in the IDLE Preferences
- dialog rather than a separate dialog. The former tabs are now a sorted
- list. Patch by Mark Roseman.
+- Issue #27095: Simplified MAKE_FUNCTION and removed MAKE_CLOSURE opcodes.
+ Patch by Demur Rumed.
-- Issue #22726: Re-activate the config dialog help button with some content
- about the other buttons and the new IDLE Dark theme.
+- Issue #27190: Raise NotSupportedError if sqlite3 is older than 3.3.1.
+ Patch by Dave Sawyer.
-- Issue #24820: IDLE now has an 'IDLE Dark' built-in text color theme.
- It is more or less IDLE Classic inverted, with a cobalt blue background.
- Strings, comments, keywords, ... are still green, red, orange, ... .
- To use it with IDLEs released before November 2015, hit the
- 'Save as New Custom Theme' button and enter a new name,
- such as 'Custom Dark'. The custom theme will work with any IDLE
- release, and can be modified.
+- Issue #27286: Fixed compiling BUILD_MAP_UNPACK_WITH_CALL opcode. Calling
+ function with generalized unpacking (PEP 448) and conflicting keyword names
+ could cause undefined behavior.
-- Issue #25224: README.txt is now an idlelib index for IDLE developers and
- curious users. The previous user content is now in the IDLE doc chapter.
- 'IDLE' now means 'Integrated Development and Learning Environment'.
+- Issue #27140: Added BUILD_CONST_KEY_MAP opcode.
-- Issue #24820: Users can now set breakpoint colors in
- Settings -> Custom Highlighting. Original patch by Mark Roseman.
+- Issue #27186: Add support for os.PathLike objects to open() (part of PEP 519).
-- Issue #24972: Inactive selection background now matches active selection
- background, as configured by users, on all systems. Found items are now
- always highlighted on Windows. Initial patch by Mark Roseman.
+- Issue #27066: Fixed SystemError if a custom opener (for open()) returns a
+ negative number without setting an exception.
-- Issue #24570: Idle: make calltip and completion boxes appear on Macs
- affected by a tk regression. Initial patch by Mark Roseman.
+- Issue #26983: float() now always return an instance of exact float.
+ The deprecation warning is emitted if __float__ returns an instance of
+ a strict subclass of float. In a future versions of Python this can
+ be an error.
-- Issue #24988: Idle ScrolledList context menus (used in debugger)
- now work on Mac Aqua. Patch by Mark Roseman.
+- Issue #27097: Python interpreter is now about 7% faster due to optimized
+ instruction decoding. Based on patch by Demur Rumed.
-- Issue #24801: Make right-click for context menu work on Mac Aqua.
- Patch by Mark Roseman.
+- Issue #26647: Python interpreter now uses 16-bit wordcode instead of bytecode.
+ Patch by Demur Rumed.
-- Issue #25173: Associate tkinter messageboxes with a specific widget.
- For Mac OSX, make them a 'sheet'. Patch by Mark Roseman.
+- Issue #23275: Allow assigning to an empty target list in round brackets:
+ () = iterable.
-- Issue #25198: Enhance the initial html viewer now used for Idle Help.
- * Properly indent fixed-pitch text (patch by Mark Roseman).
- * Give code snippet a very Sphinx-like light blueish-gray background.
- * Re-use initial width and height set by users for shell and editor.
- * When the Table of Contents (TOC) menu is used, put the section header
- at the top of the screen.
+- Issue #27243: Update the __aiter__ protocol: instead of returning
+ an awaitable that resolves to an asynchronous iterator, the asynchronous
+ iterator should be returned directly. Doing the former will trigger a
+ PendingDeprecationWarning.
-- Issue #25225: Condense and rewrite Idle doc section on text colors.
-- Issue #21995: Explain some differences between IDLE and console Python.
+Library
+-------
-- Issue #22820: Explain need for *print* when running file from Idle editor.
+- Comment out socket (SO_REUSEPORT) and posix (O_SHLOCK, O_EXLOCK) constants
+ exposed on the API which are not implemented on GNU/Hurd. They would not
+ work at runtime anyway.
-- Issue #25224: Doc: augment Idle feature list and no-subprocess section.
+- Issue #27025: Generated names for Tkinter widgets are now more meanful
+ and recognizirable.
-- Issue #25219: Update doc for Idle command line options.
- Some were missing and notes were not correct.
+- Issue #25455: Fixed crashes in repr of recursive ElementTree.Element and
+ functools.partial objects.
-- Issue #24861: Most of idlelib is private and subject to change.
- Use idleib.idle.* to start Idle. See idlelib.__init__.__doc__.
+- Issue #27294: Improved repr for Tkinter event objects.
-- Issue #25199: Idle: add synchronization comments for future maintainers.
+- Issue #20508: Improve exception message of IPv{4,6}Network.__getitem__.
+ Patch by Gareth Rees.
-- Issue #16893: Replace help.txt with help.html for Idle doc display.
- The new idlelib/help.html is rstripped Doc/build/html/library/idle.html.
- It looks better than help.txt and will better document Idle as released.
- The tkinter html viewer that works for this file was written by Mark Roseman.
- The now unused EditorWindow.HelpDialog class and helt.txt file are deprecated.
+- [Security] Issue #26556: Update expat to 2.1.1, fixes CVE-2015-1283.
-- Issue #24199: Deprecate unused idlelib.idlever with possible removal in 3.6.
+- [Security] Fix TLS stripping vulnerability in smtplib, CVE-2016-0772.
+ Reported by Team Oststrom.
-- Issue #24790: Remove extraneous code (which also create 2 & 3 conflicts).
+- Issue #21386: Implement missing IPv4Address.is_global property. It was
+ documented since 07a5610bae9d. Initial patch by Roger Luethi.
-Documentation
--------------
+- Issue #27029: Removed deprecated support of universal newlines mode from
+ ZipFile.open().
-- Issue #22558: Add remaining doc links to source code for Python-coded modules.
- Patch by Yoni Lavi.
+- Issue #27030: Unknown escapes consisting of ``'\'`` and an ASCII letter in
+ regular expressions now are errors. The re.LOCALE flag now can be used
+ only with bytes patterns.
-- Issue #12067: Rewrite Comparisons section in the Expressions chapter of the
- language reference. Some of the details of comparing mixed types were
- incorrect or ambiguous. NotImplemented is only relevant at a lower level
- than the Expressions chapter. Added details of comparing range() objects,
- and default behaviour and consistency suggestions for user-defined classes.
- Patch from Andy Maier.
+- Issue #27186: Add os.PathLike support to DirEntry (part of PEP 519).
+ Initial patch by Jelle Zijlstra.
-- Issue #24952: Clarify the default size argument of stack_size() in
- the "threading" and "_thread" modules. Patch from Mattip.
+- Issue #20900: distutils register command now decodes HTTP responses
+ correctly. Initial patch by ingrid.
-- Issue #23725: Overhaul tempfile docs. Note deprecated status of mktemp.
- Patch from Zbigniew Jędrzejewski-Szmek.
+- Issue #27186: Add os.PathLike support to pathlib, removing its provisional
+ status (part of PEP 519). Initial patch by Dusty Phillips.
-- Issue #24808: Update the types of some PyTypeObject fields. Patch by
- Joseph Weston.
+- Issue #27186: Add support for os.PathLike objects to os.fsencode() and
+ os.fsdecode() (part of PEP 519).
-- Issue #22812: Fix unittest discovery examples.
- Patch from Pam McA'Nulty.
+- Issue #27186: Introduce os.PathLike and os.fspath() (part of PEP 519).
-Tests
------
+- A new version of typing.py provides several new classes and
+ features: @overload outside stubs, Reversible, DefaultDict, Text,
+ ContextManager, Type[], NewType(), TYPE_CHECKING, and numerous bug
+ fixes (note that some of the new features are not yet implemented in
+ mypy or other static analyzers). Also classes for PEP 492
+ (Awaitable, AsyncIterable, AsyncIterator) have been added (in fact
+ they made it into 3.5.1 but were never mentioned).
-- Issue #25449: Added tests for OrderedDict subclasses.
+- Issue #25738: Stop http.server.BaseHTTPRequestHandler.send_error() from
+ sending a message body for 205 Reset Content. Also, don't send Content
+ header fields in responses that don't have a body. Patch by Susumu
+ Koshiba.
-- Issue #25099: Make test_compileall not fail when an entry on sys.path cannot
- be written to (commonly seen in administrative installs on Windows).
+- Issue #21313: Fix the "platform" module to tolerate when sys.version
+ contains truncated build information.
-- Issue #23919: Prevents assert dialogs appearing in the test suite.
+- [Security] Issue #26839: On Linux, :func:`os.urandom` now calls
+ ``getrandom()`` with ``GRND_NONBLOCK`` to fall back on reading
+ ``/dev/urandom`` if the urandom entropy pool is not initialized yet. Patch
+ written by Colm Buckley.
-- ``PCbuild\rt.bat`` now accepts an unlimited number of arguments to pass along
- to regrtest.py. Previously there was a limit of 9.
+- Issue #23883: Added missing APIs to __all__ to match the documented APIs
+ for the following modules: cgi, mailbox, mimetypes, plistlib and smtpd.
+ Patches by Jacek Kołodziej.
-Build
------
+- Issue #27164: In the zlib module, allow decompressing raw Deflate streams
+ with a predefined zdict. Based on patch by Xiang Zhang.
-- Issue #24915: Add LLVM support for PGO builds and use the test suite to
- generate the profile data. Initial patch by Alecsandru Patrascu of Intel.
+- Issue #24291: Fix wsgiref.simple_server.WSGIRequestHandler to completely
+ write data to the client. Previously it could do partial writes and
+ truncate data. Also, wsgiref.handler.ServerHandler can now handle stdout
+ doing partial writes, but this is deprecated.
-- Issue #24910: Windows MSIs now have unique display names.
+- Issue #21272: Use _sysconfigdata.py to initialize distutils.sysconfig.
-- Issue #24986: It is now possible to build Python on Windows without errors
- when external libraries are not available.
+- Issue #19611: :mod:`inspect` now reports the implicit ``.0`` parameters
+ generated by the compiler for comprehension and generator expression scopes
+ as if they were positional-only parameters called ``implicit0``.
+ Patch by Jelle Zijlstra.
-Windows
--------
+- Issue #26809: Add ``__all__`` to :mod:`string`. Patch by Emanuel Barry.
-- Issue #25450: Updates shortcuts to start Python in installation directory.
+- Issue #26373: subprocess.Popen.communicate now correctly ignores
+ BrokenPipeError when the child process dies before .communicate()
+ is called in more/all circumstances.
-- Issue #25164: Changes default all-users install directory to match per-user
- directory.
+- signal, socket, and ssl module IntEnum constant name lookups now return a
+ consistent name for values having multiple names. Ex: signal.Signals(6)
+ now refers to itself as signal.SIGALRM rather than flipping between that
+ and signal.SIGIOT based on the interpreter's hash randomization seed.
-- Issue #25143: Improves installer error messages for unsupported platforms.
+- Issue #27167: Clarify the subprocess.CalledProcessError error message text
+ when the child process died due to a signal.
-- Issue #25163: Display correct directory in installer when using non-default
- settings.
+- Issue #25931: Don't define socketserver.Forking* names on platforms such
+ as Windows that do not support os.fork().
-- Issue #25361: Disables use of SSE2 instructions in Windows 32-bit build
+- Issue #21776: distutils.upload now correctly handles HTTPError.
+ Initial patch by Claudiu Popa.
-- Issue #25089: Adds logging to installer for case where launcher is not
- selected on upgrade.
+- Issue #26526: Replace custom parse tree validation in the parser
+ module with a simple DFA validator.
-- Issue #25165: Windows uninstallation should not remove launcher if other
- versions remain
+- Issue #27114: Fix SSLContext._load_windows_store_certs fails with
+ PermissionError
-- Issue #25112: py.exe launcher is missing icons
+- Issue #18383: Avoid creating duplicate filters when using filterwarnings
+ and simplefilter. Based on patch by Alex Shkop.
-- Issue #25102: Windows installer does not precompile for -O or -OO.
+- Issue #23026: winreg.QueryValueEx() now return an integer for REG_QWORD type.
-- Issue #25081: Makes Back button in installer go back to upgrade page when
- upgrading.
+- Issue #26741: subprocess.Popen destructor now emits a ResourceWarning warning
+ if the child process is still running.
-- Issue #25091: Increases font size of the installer.
+- Issue #27056: Optimize pickle.load() and pickle.loads(), up to 10% faster
+ to deserialize a lot of small objects.
-- Issue #25126: Clarifies that the non-web installer will download some
- components.
+- Issue #21271: New keyword only parameters in reset_mock call.
-- Issue #25213: Restores requestedExecutionLevel to manifest to disable
- UAC virtualization.
+IDLE
+----
-- Issue #25022: Removed very outdated PC/example_nt/ directory.
+- Issue #5124: Paste with text selected now replaces the selection on X11.
+ This matches how paste works on Windows, Mac, most modern Linux apps,
+ and ttk widgets. Original patch by Serhiy Storchaka.
-Tools/Demos
------------
+- Issue #24750: Switch all scrollbars in IDLE to ttk versions.
+ Where needed, minimal tests are added to cover changes.
-- Issue #25440: Fix output of python-config --extension-suffix.
+- Issue #24759: IDLE requires tk 8.5 and availability ttk widgets.
+ Delete now unneeded tk version tests and code for older versions.
+ Add test for IDLE syntax colorizoer.
+- Issue #27239: idlelib.macosx.isXyzTk functions initialize as needed.
-What's New in Python 3.5.0 final?
-=================================
+- Issue #27262: move Aqua unbinding code, which enable context menus, to maxosx.
-Release date: 2015-09-13
+- Issue #24759: Make clear in idlelib.idle_test.__init__ that the directory
+ is a private implementation of test.test_idle and tool for maintainers.
-Build
------
+- Issue #27196: Stop 'ThemeChanged' warnings when running IDLE tests.
+ These persisted after other warnings were suppressed in #20567.
+ Apply Serhiy Storchaka's update_idletasks solution to four test files.
+ Record this additional advice in idle_test/README.txt
-- Issue #25071: Windows installer should not require TargetDir
- parameter when installing quietly.
+- Issue #20567: Revise idle_test/README.txt with advice about avoiding
+ tk warning messages from tests. Apply advice to several IDLE tests.
+- Issue #24225: Update idlelib/README.txt with new file names
+ and event handlers.
-What's New in Python 3.5.0 release candidate 4?
-===============================================
+- Issue #27156: Remove obsolete code not used by IDLE. Replacements:
+ 1. help.txt, replaced by help.html, is out-of-date and should not be used.
+ Its dedicated viewer has be replaced by the html viewer in help.py.
+ 2. ``import idlever; I = idlever.IDLE_VERSION`` is the same as
+ ``import sys; I = version[:version.index(' ')]``
+ 3. After ``ob = stackviewer.VariablesTreeItem(*args)``,
+ ``ob.keys() == list(ob.object.keys)``.
+ 4. In macosc, runningAsOSXAPP == isAquaTk; idCarbonAquaTk == isCarbonTk
-Release date: 2015-09-09
+- Issue #27117: Make colorizer htest and turtledemo work with dark themes.
+ Move code for configuring text widget colors to a new function.
-Library
--------
+- Issue #24225: Rename many `idlelib/*.py` and `idle_test/test_*.py` files.
+ Edit files to replace old names with new names when the old name
+ referred to the module rather than the class it contained.
+ See the issue and IDLE section in What's New in 3.6 for more.
-- Issue #25029: Fixes MemoryError in test_strptime.
-
-Build
------
+- Issue #26673: When tk reports font size as 0, change to size 10.
+ Such fonts on Linux prevented the configuration dialog from opening.
-- Issue #25027: Reverts partial-static build options and adds
- vcruntime140.dll to Windows installation.
+- Issue #21939: Add test for IDLE's percolator.
+ Original patch by Saimadhav Heblikar.
+- Issue #21676: Add test for IDLE's replace dialog.
+ Original patch by Saimadhav Heblikar.
-What's New in Python 3.5.0 release candidate 3?
-===============================================
+- Issue #18410: Add test for IDLE's search dialog.
+ Original patch by Westley Martínez.
-Release date: 2015-09-07
+- Issue #21703: Add test for undo delegator. Patch mostly by
+ Saimadhav Heblikar .
-Core and Builtins
------------------
+- Issue #27044: Add ConfigDialog.remove_var_callbacks to stop memory leaks.
-- Issue #24305: Prevent import subsystem stack frames from being counted
- by the warnings.warn(stacklevel=) parameter.
+- Issue #23977: Add more asserts to test_delegator.
-- Issue #24912: Prevent __class__ assignment to immutable built-in objects.
+Documentation
+-------------
-- Issue #24975: Fix AST compilation for PEP 448 syntax.
+- Issue #16484: Change the default PYTHONDOCS URL to "https:", and fix the
+ resulting links to use lowercase. Patch by Sean Rodman, test by Kaushik
+ Nadikuditi.
-Library
--------
+- Issue #24136: Document the new PEP 448 unpacking syntax of 3.5.
-- Issue #24917: time_strftime() buffer over-read.
+- Issue #22558: Add remaining doc links to source code for Python-coded modules.
+ Patch by Yoni Lavi.
-- Issue #24748: To resolve a compatibility problem found with py2exe and
- pywin32, imp.load_dynamic() once again ignores previously loaded modules
- to support Python modules replacing themselves with extension modules.
- Patch by Petr Viktorin.
+Tests
+-----
-- Issue #24635: Fixed a bug in typing.py where isinstance([], typing.Iterable)
- would return True once, then False on subsequent calls.
+- Issue #25285: regrtest now uses subprocesses when the -j1 command line option
+ is used: each test file runs in a fresh child process. Before, the -j1 option
+ was ignored.
-- Issue #24989: Fixed buffer overread in BytesIO.readline() if a position is
- set beyond size. Based on patch by John Leitch.
+- Issue #25285: Tools/buildbot/test.bat script now uses -j1 by default to run
+ each test file in fresh child process.
-- Issue #24913: Fix overrun error in deque.index().
- Found by John Leitch and Bryce Darling.
+Windows
+-------
+- Issue #27064: The py.exe launcher now defaults to Python 3.
+ The Windows launcher ``py.exe`` no longer prefers an installed
+ Python 2 version over Python 3 by default when used interactively.
-What's New in Python 3.5.0 release candidate 2?
-===============================================
+Build
+-----
-Release date: 2015-08-25
+- Issue #27229: Fix the cross-compiling pgen rule for in-tree builds. Patch
+ by Xavier de Gaye.
-Core and Builtins
------------------
+- Issue #26930: Update OS X 10.5+ 32-bit-only installer to build
+ and link with OpenSSL 1.0.2h.
-- Issue #24769: Interpreter now starts properly when dynamic loading
- is disabled. Patch by Petr Viktorin.
+Misc
+----
-- Issue #21167: NAN operations are now handled correctly when python is
- compiled with ICC even if -fp-model strict is not specified.
+- Issue #17500, and https://github.com/python/pythondotorg/issues/945: Remove
+ unused and outdated icons.
-- Issue #24492: A "package" lacking a __name__ attribute when trying to perform
- a ``from .. import ...`` statement will trigger an ImportError instead of an
- AttributeError.
+C API
+-----
-Library
--------
+- Issue #27186: Add the PyOS_FSPath() function (part of PEP 519).
-- Issue #24847: Removes vcruntime140.dll dependency from Tcl/Tk.
+- Issue #26282: PyArg_ParseTupleAndKeywords() now supports positional-only
+ parameters.
-- Issue #24839: platform._syscmd_ver raises DeprecationWarning
+Tools/Demos
+-----------
-- Issue #24867: Fix Task.get_stack() for 'async def' coroutines
+- Issue #26282: Argument Clinic now supports positional-only and keyword
+ parameters in the same function.
-What's New in Python 3.5.0 release candidate 1?
-===============================================
+What's New in Python 3.6.0 alpha 1?
+===================================
-Release date: 2015-08-09
+Release date: 2016-05-16
Core and Builtins
-----------------
projects / python / commitdiff