.. bpo: 36052
.. date: 2019-02-20-17-57-31
.. nonce: l8lJSi
.. release date: 2019-02-25
.. section: Core and Builtins
Raise a :exc:`SyntaxError` when assigning a value to ``__debug__`` with the
Assignment Operator. Contributed by Stéphane Wirtel and Pablo Galindo.
..
.. bpo: 36012
.. date: 2019-02-19-10-47-51
.. nonce: xq7C9E
.. section: Core and Builtins
Doubled the speed of class variable writes. When a non-dunder attribute was
updated, there was an unnecessary call to update slots.
..
.. bpo: 35942
.. date: 2019-02-18-09-30-55
.. nonce: oLhL2v
.. section: Core and Builtins
The error message emitted when returning invalid types from ``__fspath__``
in interfaces that allow passing :class:`~os.PathLike` objects has been
improved and now it does explain the origin of the error.
..
.. bpo: 36016
.. date: 2019-02-17-20-23-54
.. nonce: 5Hns-f
.. section: Core and Builtins
``gc.get_objects`` can now receive an optional parameter indicating a
generation to get objects from. Patch by Pablo Galindo.
..
.. bpo: 1054041
.. date: 2019-02-16-00-42-32
.. nonce: BL-WLd
.. section: Core and Builtins
When the main interpreter exits due to an uncaught KeyboardInterrupt, the
process now exits in the appropriate manner for its parent process to detect
that a SIGINT or ^C terminated the process. This allows shells and batch
scripts to understand that the user has asked them to stop.
..
.. bpo: 35992
.. date: 2019-02-14-12-01-44
.. nonce: nG9e2L
.. section: Core and Builtins
Fix ``__class_getitem__()`` not being called on a class with a custom
non-subscriptable metaclass.
..
.. bpo: 35993
.. date: 2019-02-14-09-17-54
.. nonce: Bvm3fP
.. section: Core and Builtins
Fix a crash on fork when using subinterpreters. Contributed by Stéphane
Wirtel
..
.. bpo: 35991
.. date: 2019-02-14-00-00-30
.. nonce: xlbfSk
.. section: Core and Builtins
Fix a potential double free in Modules/_randommodule.c.
..
.. bpo: 35961
.. date: 2019-02-12-20-16-34
.. nonce: 7f7Sne
.. section: Core and Builtins
Fix a crash in slice_richcompare(): use strong references rather than stolen
references for the two temporary internal tuples.
..
.. bpo: 35911
.. date: 2019-02-06-17-50-59
.. nonce: oiWE8
.. section: Core and Builtins
Enable the creation of cell objects by adding a ``cell.__new__`` method, and
expose the type ``cell`` in ``Lib/types.py`` under the name CellType. Patch
by Pierre Glaser.
..
.. bpo: 12822
.. date: 2019-02-05-12-48-23
.. nonce: 0x2NDx
.. section: Core and Builtins
Use monotonic clock for ``pthread_cond_timedwait`` when
``pthread_condattr_setclock`` and ``CLOCK_MONOTONIC`` are available.
..
.. bpo: 15248
.. date: 2019-02-04-21-10-17
.. nonce: 2sXSZZ
.. section: Core and Builtins
The compiler emits now syntax warnings in the case when a comma is likely
missed before tuple or list.
..
.. bpo: 35886
.. date: 2019-02-01-18-12-14
.. nonce: 0Z-C0V
.. section: Core and Builtins
The implementation of PyInterpreterState has been moved into the internal
header files (guarded by Py_BUILD_CORE).
..
.. bpo: 31506
.. date: 2019-01-22-02-06-39
.. nonce: eJ5FpV
.. section: Core and Builtins
Clarify the errors reported when ``object.__new__`` and ``object.__init__``
receive more than one argument. Contributed by Sanyam Khurana.
..
.. bpo: 35724
.. date: 2019-01-11-14-46-08
.. nonce: Wv79MG
.. section: Core and Builtins
Signal-handling is now guaranteed to happen relative to the main
interpreter.
..
.. bpo: 33608
.. date: 2018-09-15-12-13-46
.. nonce: avmvVP
.. section: Core and Builtins
We added a new internal _Py_AddPendingCall() that operates relative to the
provided interpreter. This allows us to use the existing implementation to
ask another interpreter to do work that cannot be done in the current
interpreter, like decref an object the other interpreter owns. The existing
Py_AddPendingCall() only operates relative to the main interpreter.
..
.. bpo: 33989
.. date: 2018-08-08-20-52-55
.. nonce: TkLBui
.. section: Core and Builtins
Fix a possible crash in :meth:`list.sort` when sorting objects with
``ob_type->tp_richcompare == NULL``. Patch by Zackery Spytz.
..
.. bpo: 35512
.. date: 2019-02-24-00-04-10
.. nonce: eWDjCJ
.. section: Library
:func:`unittest.mock.patch.dict` used as a decorator with string target
resolves the target during function call instead of during decorator
construction. Patch by Karthikeyan Singaravelan.
..
.. bpo: 36018
.. date: 2019-02-21-15-47-00
.. nonce: qt7QUe
.. section: Library
Add statistics.NormalDist, a tool for creating and manipulating normal
distributions of random variable. Features a composite class that treats
the mean and standard deviation of measurement data as single entity.
..
.. bpo: 35904
.. date: 2019-02-16-00-55-52
.. nonce: V88MCD
.. section: Library
Added statistics.fmean() as a faster, floating-point variant of the existing
mean() function.
..
.. bpo: 35918
.. date: 2019-02-11-16-23-10
.. nonce: oGDlpT
.. section: Library
Removed broken ``has_key`` method from
multiprocessing.managers.SyncManager.dict. Contributed by Rémi Lapeyre.
..
.. bpo: 18283
.. date: 2019-02-11-09-24-08
.. nonce: BT3Jhc
.. section: Library
Add support for bytes to :func:`shutil.which`.
..
.. bpo: 35960
.. date: 2019-02-10-20-57-12
.. nonce: bh-6Ja
.. section: Library
Fix :func:`dataclasses.field` throwing away empty mapping objects passed as
metadata.
..
.. bpo: 35500
.. date: 2019-02-10-00-00-13
.. nonce: 1HOMmo
.. section: Library
Write expected and actual call parameters on separate lines in
:meth:`unittest.mock.Mock.assert_called_with` assertion errors. Contributed
by Susan Su.
..
.. bpo: 35931
.. date: 2019-02-07-16-22-50
.. nonce: _63i7B
.. section: Library
The :mod:`pdb` ``debug`` command now gracefully handles syntax errors.
..
.. bpo: 24209
.. date: 2019-02-06-01-40-55
.. nonce: awtwPD
.. section: Library
In http.server script, rely on getaddrinfo to bind to preferred address
based on the bind parameter. Now default bind or binding to a name may bind
to IPv6 or dual-stack, depending on the environment.
..
.. bpo: 35321
.. date: 2019-02-02-01-53-36
.. nonce: 1Y4DU4
.. section: Library
Set ``__spec__.origin`` of ``_frozen_importlib`` to frozen so that it
matches the behavior of ``_frozen_importlib_external``. Patch by Nina
Zakharenko.
..
.. bpo: 35378
.. date: 2019-01-21-02-15-20
.. nonce: 4oF03i
.. section: Library
Fix a reference issue inside :class:`multiprocessing.Pool` that caused the
pool to remain alive if it was deleted without being closed or terminated
explicitly. A new strong reference is added to the pool iterators to link
the lifetime of the pool to the lifetime of its iterators so the pool does
not get destroyed if a pool iterator is still alive.
..
.. bpo: 34294
.. date: 2019-01-14-11-53-10
.. nonce: 3JFdg2
.. section: Library
re module, fix wrong capturing groups in rare cases. :func:`re.search`,
:func:`re.findall`, :func:`re.sub` and other functions that scan through
string looking for a match, should reset capturing groups between two match
attempts. Patch by Ma Lin.
..
.. bpo: 35615
.. date: 2018-12-30-20-00-05
.. nonce: Uz1SVh
.. section: Library
:mod:`weakref`: Fix a RuntimeError when copying a WeakKeyDictionary or a
WeakValueDictionary, due to some keys or values disappearing while
iterating.
..
.. bpo: 35606
.. date: 2018-12-29-21-59-03
.. nonce: NjGjou
.. section: Library
Implement :func:`math.prod` as analogous function to :func:`sum` that
returns the product of a 'start' value (default: 1) times an iterable of
numbers. Patch by Pablo Galindo.
..
.. bpo: 32417
.. date: 2018-12-04-13-35-36
.. nonce: _Y9SKM
.. section: Library
Performing arithmetic between :class:`datetime.datetime` subclasses and
:class:`datetime.timedelta` now returns an object of the same type as the
:class:`datetime.datetime` subclass. As a result,
:meth:`datetime.datetime.astimezone` and alternate constructors like
:meth:`datetime.datetime.now` and :meth:`datetime.fromtimestamp` called with
a ``tz`` argument now *also* retain their subclass.
..
.. bpo: 35153
.. date: 2018-11-03-12-38-03
.. nonce: 009pdF
.. section: Library
Add *headers* optional keyword-only parameter to
:class:`xmlrpc.client.ServerProxy`, :class:`xmlrpc.client.Transport` and
:class:`xmlrpc.client.SafeTransport`. Patch by Cédric Krier.
..
.. bpo: 34572
.. date: 2018-09-05-03-02-32
.. nonce: ayisd2
.. section: Library
Fix C implementation of pickle.loads to use importlib's locking mechanisms,
and thereby avoid using partially loaded modules. Patch by Tim Burgess.
..
.. bpo: 36083
.. date: 2019-02-24-12-40-13
.. nonce: JX7zbv
.. section: Documentation
Fix formatting of --check-hash-based-pycs options in the manpage Synopsis.
..
.. bpo: 36007
.. date: 2019-02-15-15-33-41
.. nonce: OTFrza
.. section: Documentation
Bump minimum sphinx version to 1.8. Patch by Anthony Sottile.
..
.. bpo: 22062
.. date: 2018-07-28-12-41-01
.. nonce: TaN2hn
.. section: Documentation
Update documentation and docstrings for pathlib. Original patch by Mike
Short.
..
.. bpo: 27313
.. date: 2019-02-24-01-58-38
.. nonce: Sj9veH
.. section: Tests
Avoid test_ttk_guionly ComboboxTest failure with macOS Cocoa Tk.
..
.. bpo: 36019
.. date: 2019-02-21-14-23-51
.. nonce: zS_OUi
.. section: Tests
Add test.support.TEST_HTTP_URL and replace references of
http://www.example.com by this new constant. Contributed by Stéphane Wirtel.
..
.. bpo: 36037
.. date: 2019-02-19-15-21-14
.. nonce: 75wG9_
.. section: Tests
Fix test_ssl for strict OpenSSL configuration like RHEL8 strict crypto
policy. Use older TLS version for minimum TLS version of the server SSL
context if needed, to test TLS version older than default minimum TLS
version.
..
.. bpo: 35798
.. date: 2019-02-16-15-19-31
.. nonce: JF16MP
.. section: Tests
Added :func:`test.support.check_syntax_warning`.
..
.. bpo: 35505
.. date: 2019-02-12-01-33-08
.. nonce: N9ba_K
.. section: Tests
Make test_imap4_host_default_value independent on whether the local IMAP
server is running.
..
.. bpo: 35917
.. date: 2019-02-06-18-06-16
.. nonce: -Clv1L
.. section: Tests
multiprocessing: provide unit tests for SyncManager and SharedMemoryManager
classes + all the shareable types which are supposed to be supported by
them. (patch by Giampaolo Rodola)
..
.. bpo: 35704
.. date: 2019-01-10-09-14-58
.. nonce: FLglYo
.. section: Tests
Skip ``test_shutil.test_unpack_archive_xztar`` to prevent a MemoryError on
32-bit AIX when MAXDATA setting is less than 0x20000000.
Patch by Michael Felt (aixtools)
..
.. bpo: 34720
.. date: 2018-12-26-12-31-16
.. nonce: T268vz
.. section: Tests
Assert m_state != NULL to mimic GC traversal functions that do not correctly
handle module creation when the module state has not been created.
..
.. bpo: 35976
.. date: 2019-02-11-20-07-43
.. nonce: toap7O
.. section: Windows
Added ARM build support to Windows build files in PCBuild.
..
.. bpo: 35692
.. date: 2019-02-02-16-23-57
.. nonce: cIiiE9
.. section: Windows
``pathlib`` no longer raises when checking file and directory existence on
drives that are not ready
..
.. bpo: 35872
.. date: 2019-02-02-15-57-19
.. nonce: Bba2n7
.. section: Windows
Uses the base Python executable when invoking venv in a virtual environment
..
.. bpo: 35873
.. date: 2019-02-02-15-56-50
.. nonce: UW-qS9
.. section: Windows
Prevents venv paths being inherited by child processes
..
.. bpo: 35299
.. date: 2019-02-02-14-47-12
.. nonce: 1rgEzd
.. section: Windows
Fix sysconfig detection of the source directory and distutils handling of
pyconfig.h during PGO profiling
..
.. bpo: 24310
.. date: 2019-02-23-22-31-20
.. nonce: j_vJQl
.. section: IDLE
IDLE -- Document settings dialog font tab sample.
..
.. bpo: 35833
.. date: 2019-02-08-22-14-24
.. nonce: XKFRvF
.. section: IDLE
Revise IDLE doc for control codes sent to Shell. Add a code example block.
..
.. bpo: 35689
.. date: 2019-01-08-17-51-44
.. nonce: LlaqR8
.. section: IDLE
Add docstrings and unittests for colorizer.py.
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