685 lines
14 KiB
ReStructuredText
685 lines
14 KiB
ReStructuredText
.. bpo: 31558
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.. date: 2017-10-16-14-27-25
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.. nonce: K-uRRm
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.. release date: 2017-10-16
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.. section: Core and Builtins
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``gc.freeze()`` is a new API that allows for moving all objects currently
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tracked by the garbage collector to a permanent generation, effectively
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removing them from future collection events. This can be used to protect
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those objects from having their PyGC_Head mutated. In effect, this enables
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great copy-on-write stability at fork().
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..
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.. bpo: 31642
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.. date: 2017-10-08-10-00-55
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.. nonce: 1IKqgs
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.. section: Core and Builtins
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Restored blocking "from package import module" by setting
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sys.modules["package.module"] to None.
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..
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.. bpo: 31708
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.. date: 2017-10-06-02-10-48
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.. nonce: 66CCVU
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.. section: Core and Builtins
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Allow use of asynchronous generator expressions in synchronous functions.
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..
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.. bpo: 31709
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.. date: 2017-10-06-00-27-04
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.. nonce: _PmU51
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.. section: Core and Builtins
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Drop support of asynchronous __aiter__.
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..
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.. bpo: 30404
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.. date: 2017-10-03-23-46-39
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.. nonce: _9Yi5u
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.. section: Core and Builtins
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The -u option now makes the stdout and stderr streams unbuffered rather than
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line-buffered.
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..
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.. bpo: 31619
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.. date: 2017-09-29-20-32-24
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.. nonce: 6gQ1kv
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.. section: Core and Builtins
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Fixed a ValueError when convert a string with large number of underscores to
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integer with binary base.
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..
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.. bpo: 31602
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.. date: 2017-09-27-09-30-03
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.. nonce: MtgLCn
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.. section: Core and Builtins
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Fix an assertion failure in `zipimporter.get_source()` in case of a bad
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`zlib.decompress()`. Patch by Oren Milman.
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..
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.. bpo: 31592
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.. date: 2017-09-26-16-05-04
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.. nonce: IFBZj9
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.. section: Core and Builtins
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Fixed an assertion failure in Python parser in case of a bad
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`unicodedata.normalize()`. Patch by Oren Milman.
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..
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.. bpo: 31588
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.. date: 2017-09-26-13-03-16
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.. nonce: wT9Iy7
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.. section: Core and Builtins
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Raise a `TypeError` with a helpful error message when class creation fails
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due to a metaclass with a bad ``__prepare__()`` method. Patch by Oren
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Milman.
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..
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.. bpo: 31574
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.. date: 2017-09-25-12-35-48
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.. nonce: 5yX5r5
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.. section: Core and Builtins
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Importlib was instrumented with two dtrace probes to profile import timing.
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..
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.. bpo: 31566
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.. date: 2017-09-24-09-57-04
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.. nonce: OxwINs
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.. section: Core and Builtins
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Fix an assertion failure in `_warnings.warn()` in case of a bad ``__name__``
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global. Patch by Oren Milman.
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..
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.. bpo: 31506
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.. date: 2017-09-19-10-29-36
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.. nonce: pRVTRB
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.. section: Core and Builtins
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Improved the error message logic for object.__new__ and object.__init__.
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..
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.. bpo: 31505
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.. date: 2017-09-18-12-07-39
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.. nonce: VomaFa
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.. section: Core and Builtins
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Fix an assertion failure in `json`, in case `_json.make_encoder()` received
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a bad `encoder()` argument. Patch by Oren Milman.
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..
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.. bpo: 31492
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.. date: 2017-09-16-22-49-16
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.. nonce: RtyteL
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.. section: Core and Builtins
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Fix assertion failures in case of failing to import from a module with a bad
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``__name__`` attribute, and in case of failing to access an attribute of
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such a module. Patch by Oren Milman.
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..
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.. bpo: 31478
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.. date: 2017-09-15-09-13-07
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.. nonce: o06iKD
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.. section: Core and Builtins
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Fix an assertion failure in `_random.Random.seed()` in case the argument has
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a bad ``__abs__()`` method. Patch by Oren Milman.
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..
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.. bpo: 31336
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.. date: 2017-09-13-12-04-23
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.. nonce: gi2ahY
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.. section: Core and Builtins
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Speed up class creation by 10-20% by reducing the overhead in the necessary
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special method lookups. Patch by Stefan Behnel.
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..
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.. bpo: 31415
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.. date: 2017-09-11-14-28-56
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.. nonce: GBdz7o
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.. section: Core and Builtins
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Add ``-X importtime`` option to show how long each import takes. It can be
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used to optimize application's startup time. Support the
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:envvar:`PYTHONPROFILEIMPORTTIME` as an equivalent way to enable this.
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..
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.. bpo: 31410
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.. date: 2017-09-10-20-58-51
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.. nonce: wD_RbH
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.. section: Core and Builtins
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Optimized calling wrapper and classmethod descriptors.
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..
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.. bpo: 31353
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.. date: 2017-09-05-14-19-02
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.. nonce: oGZUeJ
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.. section: Core and Builtins
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:pep:`553` - Add a new built-in called ``breakpoint()`` which calls
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``sys.breakpointhook()``. By default this imports ``pdb`` and calls
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``pdb.set_trace()``, but users may override ``sys.breakpointhook()`` to call
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whatever debugger they want. The original value of the hook is saved in
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``sys.__breakpointhook__``.
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..
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.. bpo: 17852
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.. date: 2017-09-04-12-46-25
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.. nonce: OxAtCg
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.. section: Core and Builtins
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Maintain a list of open buffered files, flush them before exiting the
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interpreter. Based on a patch from Armin Rigo.
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..
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.. bpo: 31315
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.. date: 2017-09-01-00-40-58
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.. nonce: ZX20bl
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.. section: Core and Builtins
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Fix an assertion failure in imp.create_dynamic(), when spec.name is not a
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string. Patch by Oren Milman.
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..
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.. bpo: 31311
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.. date: 2017-08-31-17-52-56
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.. nonce: bNE2l-
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.. section: Core and Builtins
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Fix a crash in the ``__setstate__()`` method of `ctypes._CData`, in case of
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a bad ``__dict__``. Patch by Oren Milman.
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..
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.. bpo: 31293
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.. date: 2017-08-28-17-51-42
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.. nonce: eMYZXj
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.. section: Core and Builtins
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Fix crashes in true division and multiplication of a timedelta object by a
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float with a bad as_integer_ratio() method. Patch by Oren Milman.
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..
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.. bpo: 31285
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.. date: 2017-08-27-21-18-30
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.. nonce: 7lzaKV
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.. section: Core and Builtins
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Fix an assertion failure in `warnings.warn_explicit`, when the return value
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of the received loader's get_source() has a bad splitlines() method. Patch
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by Oren Milman.
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..
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.. bpo: 30406
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.. date: 2017-07-20-22-03-44
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.. nonce: _kr47t
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.. section: Core and Builtins
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Make ``async`` and ``await`` proper keywords, as specified in PEP 492.
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..
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.. bpo: 30058
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.. date: 2017-10-12-19-00-53
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.. nonce: cENtry
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.. section: Library
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Fixed buffer overflow in select.kqueue.control().
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..
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.. bpo: 31672
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.. date: 2017-10-12-02-47-16
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.. nonce: DaOkVd
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.. section: Library
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``idpattern`` in ``string.Template`` matched some non-ASCII characters. Now
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it uses ``-i`` regular expression local flag to avoid non-ASCII characters.
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..
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.. bpo: 31701
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.. date: 2017-10-09-17-42-30
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.. nonce: NRrVel
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.. section: Library
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On Windows, faulthandler.enable() now ignores MSC and COM exceptions.
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..
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.. bpo: 31728
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.. date: 2017-10-08-23-28-30
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.. nonce: XrVMME
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.. section: Library
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Prevent crashes in `_elementtree` due to unsafe cleanup of `Element.text`
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and `Element.tail`. Patch by Oren Milman.
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..
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.. bpo: 31671
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.. date: 2017-10-04-21-28-44
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.. nonce: E-zfc9
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.. section: Library
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Now ``re.compile()`` converts passed RegexFlag to normal int object before
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compiling. bm_regex_compile benchmark shows 14% performance improvements.
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..
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.. bpo: 30397
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.. date: 2017-10-03-22-45-50
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.. nonce: e4F7Kr
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.. section: Library
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The types of compiled regular objects and match objects are now exposed as
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`re.Pattern` and `re.Match`. This adds information in pydoc output for the
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re module.
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..
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.. bpo: 31675
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.. date: 2017-10-03-15-06-24
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.. nonce: Nh7jJ3
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.. section: Library
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Fixed memory leaks in Tkinter's methods splitlist() and split() when pass a
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string larger than 2 GiB.
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..
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.. bpo: 31673
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.. date: 2017-10-03-14-37-46
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.. nonce: RFCrka
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.. section: Library
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Fixed typo in the name of Tkinter's method adderrorinfo().
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..
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.. bpo: 31648
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.. date: 2017-09-30-10-45-12
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.. nonce: Cai7ji
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.. section: Library
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Improvements to path predicates in ElementTree:
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* Allow whitespace around predicate parts, i.e. "[a = 'text']" instead of requiring the less readable "[a='text']".
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* Add support for text comparison of the current node, like "[.='text']".
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Patch by Stefan Behnel.
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..
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.. bpo: 30806
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.. date: 2017-09-29
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.. nonce: lP5GrH
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.. section: Library
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Fix the string representation of a netrc object.
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..
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.. bpo: 31638
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.. date: 2017-09-29-07-14-28
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.. nonce: jElfhl
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.. section: Library
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Add optional argument ``compressed`` to ``zipapp.create_archive``, and add
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option ``--compress`` to the command line interface of ``zipapp``.
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..
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.. bpo: 25351
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.. date: 2017-09-28-23-10-51
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.. nonce: 2JmFpF
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.. section: Library
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Avoid venv activate failures with undefined variables
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..
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.. bpo: 20519
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.. date: 2017-09-28-13-17-33
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.. nonce: FteeQQ
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.. section: Library
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Avoid ctypes use (if possible) and improve import time for uuid.
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..
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.. bpo: 28293
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.. date: 2017-09-26-17-51-17
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.. nonce: UC5pm4
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.. section: Library
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The regular expression cache is no longer completely dumped when it is full.
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..
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.. bpo: 31596
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.. date: 2017-09-26-11-38-52
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.. nonce: 50Eyel
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.. section: Library
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Added pthread_getcpuclockid() to the time module
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..
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.. bpo: 27494
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.. date: 2017-09-26-01-43-17
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.. nonce: 37QnaT
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.. section: Library
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Make 2to3 accept a trailing comma in generator expressions. For example,
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``set(x for x in [],)`` is now allowed.
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..
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.. bpo: 30347
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.. date: 2017-09-25-14-04-30
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.. nonce: B4--_D
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.. section: Library
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Stop crashes when concurrently iterate over itertools.groupby() iterators.
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..
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.. bpo: 30346
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.. date: 2017-09-24-13-08-46
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.. nonce: Csse77
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.. section: Library
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An iterator produced by itertools.groupby() iterator now becomes exhausted
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after advancing the groupby iterator.
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..
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.. bpo: 31556
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.. date: 2017-09-22-23-48-49
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.. nonce: 9J0u5H
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.. section: Library
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Cancel asyncio.wait_for future faster if timeout <= 0
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..
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.. bpo: 31540
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.. date: 2017-09-22-16-02-00
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.. nonce: ybDHT5
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.. section: Library
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Allow passing a context object in
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:class:`concurrent.futures.ProcessPoolExecutor` constructor. Also, free job
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resources in :class:`concurrent.futures.ProcessPoolExecutor` earlier to
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improve memory usage when a worker waits for new jobs.
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..
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.. bpo: 31516
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.. date: 2017-09-20-18-43-01
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.. nonce: 23Yuq3
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.. section: Library
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``threading.current_thread()`` should not return a dummy thread at shutdown.
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..
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.. bpo: 31525
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.. date: 2017-09-19-18-48-21
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.. nonce: O2TIL2
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.. section: Library
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In the sqlite module, require the sqlite3_prepare_v2 API. Thus, the sqlite
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module now requires sqlite version at least 3.3.9.
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..
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.. bpo: 26510
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.. date: 2017-09-19-13-29-29
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.. nonce: oncW6V
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.. section: Library
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argparse subparsers are now required by default. This matches behaviour in
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Python 2. For optional subparsers, use the new parameter
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``add_subparsers(required=False)``. Patch by Anthony Sottile.
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..
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.. bpo: 27541
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.. date: 2017-09-17-19-59-04
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.. nonce: cIMFJW
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.. section: Library
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Reprs of subclasses of some collection and iterator classes (`bytearray`,
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`array.array`, `collections.deque`, `collections.defaultdict`,
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`itertools.count`, `itertools.repeat`) now contain actual type name insteads
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of hardcoded name of the base class.
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..
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.. bpo: 31351
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.. date: 2017-09-17-15-24-25
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.. nonce: yQdKv-
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.. section: Library
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python -m ensurepip now exits with non-zero exit code if pip bootstrapping
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has failed.
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..
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.. bpo: 31389
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.. date: 2017-09-07-15-31-47
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.. nonce: jNFYqB
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.. section: Library
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``pdb.set_trace()`` now takes an optional keyword-only argument ``header``.
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If given, this is printed to the console just before debugging begins.
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..
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.. bpo: 31537
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.. date: 2017-10-08-23-02-14
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.. nonce: SiFNM8
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.. section: Documentation
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Fix incorrect usage of ``get_history_length`` in readline documentation
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example code. Patch by Brad Smith.
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..
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.. bpo: 30085
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.. date: 2017-09-14-18-44-50
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.. nonce: 0J9w-u
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.. section: Documentation
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The operator functions without double underscores are preferred for clarity.
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The one with underscores are only kept for back-compatibility.
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..
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.. bpo: 31696
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.. date: 2017-10-04-23-40-32
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.. nonce: Y3_aBV
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.. section: Build
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Improve compiler version information in :data:`sys.version` when Python is
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built with Clang.
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..
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.. bpo: 31625
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.. date: 2017-09-28-23-21-20
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.. nonce: Bb2NXr
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.. section: Build
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Stop using ranlib on static libraries. Instead, we assume ar supports the
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's' flag.
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..
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.. bpo: 31624
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.. date: 2017-09-28-20-54-52
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.. nonce: 11w91_
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.. section: Build
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Remove support for BSD/OS.
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..
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.. bpo: 22140
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.. date: 2017-09-26-22-39-58
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.. nonce: ZRf7Wn
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.. section: Build
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Prevent double substitution of prefix in python-config.sh.
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..
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.. bpo: 31569
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.. date: 2017-09-25-00-25-23
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.. nonce: TS49pM
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.. section: Build
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Correct PCBuild/ case to PCbuild/ in build scripts and documentation.
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..
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.. bpo: 31536
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.. date: 2017-09-20-21-32-21
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.. nonce: KUDjno
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.. section: Build
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Avoid wholesale rebuild after `make regen-all` if nothing changed.
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..
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.. bpo: 31460
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.. date: 2017-09-30-19-03-26
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.. nonce: HpveI6
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.. section: IDLE
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Simplify the API of IDLE's Module Browser.
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Passing a widget instead of an flist with a root widget opens the option of
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creating a browser frame that is only part of a window. Passing a full file
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name instead of pieces assumed to come from a .py file opens the possibility
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of browsing python files that do not end in .py.
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..
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.. bpo: 31649
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.. date: 2017-09-30-13-59-18
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.. nonce: LxN4Vb
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.. section: IDLE
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IDLE - Make _htest, _utest parameters keyword only.
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..
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.. bpo: 31559
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.. date: 2017-09-23-12-52-24
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.. nonce: ydckYX
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.. section: IDLE
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Remove test order dependence in idle_test.test_browser.
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..
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.. bpo: 31459
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.. date: 2017-09-22-20-26-23
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.. nonce: L0pnH9
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.. section: IDLE
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Rename IDLE's module browser from Class Browser to Module Browser. The
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original module-level class and method browser became a module browser, with
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the addition of module-level functions, years ago. Nested classes and
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functions were added yesterday. For back- compatibility, the virtual event
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<<open-class-browser>>, which appears on the Keys tab of the Settings
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dialog, is not changed. Patch by Cheryl Sabella.
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..
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.. bpo: 31500
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.. date: 2017-09-18-10-43-03
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.. nonce: Y_YDxA
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.. section: IDLE
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Default fonts now are scaled on HiDPI displays.
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..
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.. bpo: 1612262
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.. date: 2017-08-14-15-13-50
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.. nonce: -x_Oyq
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.. section: IDLE
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IDLE module browser now shows nested classes and functions. Original patches
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for code and tests by Guilherme Polo and Cheryl Sabella, respectively.
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..
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.. bpo: 28280
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.. date: 2017-09-30-19-41-44
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.. nonce: K_EjpO
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.. section: C API
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Make `PyMapping_Keys()`, `PyMapping_Values()` and `PyMapping_Items()` always
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return a `list` (rather than a `list` or a `tuple`). Patch by Oren Milman.
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..
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.. bpo: 31532
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.. date: 2017-09-20-21-59-52
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.. nonce: s9Cw9_
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.. section: C API
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Fix memory corruption due to allocator mix in getpath.c between Py_GetPath()
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and Py_SetPath()
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..
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.. bpo: 25658
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.. date: 2017-06-24-14-30-44
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.. nonce: vm8vGE
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.. section: C API
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Implement PEP 539 for Thread Specific Storage (TSS) API: it is a new Thread
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Local Storage (TLS) API to CPython which would supersede use of the existing
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TLS API within the CPython interpreter, while deprecating the existing API.
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PEP written by Erik M. Bray, patch by Masayuki Yamamoto.
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