mirror of https://github.com/python/cpython
539 lines
12 KiB
ReStructuredText
539 lines
12 KiB
ReStructuredText
.. bpo: 42967
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.. date: 2021-02-14-15-59-16
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.. nonce: YApqDS
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.. release date: 2021-03-01
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.. section: Security
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Fix web cache poisoning vulnerability by defaulting the query args separator
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to ``&``, and allowing the user to choose a custom separator.
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..
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.. bpo: 43321
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.. date: 2021-02-26-13-17-52
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.. nonce: TCS3ph
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.. section: Core and Builtins
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Fix ``SystemError`` raised when ``PyArg_Parse*()`` is used with ``#`` but
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without ``PY_SSIZE_T_CLEAN`` defined.
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..
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.. bpo: 36346
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.. date: 2021-02-22-19-00-00
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.. nonce: uAoni0
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.. section: Core and Builtins
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``PyArg_Parse*()`` functions now emits ``DeprecationWarning`` when ``u`` or
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``Z`` format is used. See :pep:`623` for detail.
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..
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.. bpo: 43277
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.. date: 2021-02-20-16-50-22
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.. nonce: FXkRXk
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.. section: Core and Builtins
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Add a new :c:func:`PySet_CheckExact` function to the C-API to check if an
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object is an instance of :class:`set` but not an instance of a subtype.
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Patch by Pablo Galindo.
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..
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.. bpo: 42990
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.. date: 2021-02-18-15-12-30
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.. nonce: toAqBH
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.. section: Core and Builtins
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The :data:`types.FunctionType` constructor now inherits the current builtins
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if the *globals* dictionary has no ``"__builtins__"`` key, rather than using
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``{"None": None}`` as builtins: same behavior as :func:`eval` and
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:func:`exec` functions. Defining a function with ``def function(...): ...``
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in Python is not affected, globals cannot be overridden with this syntax: it
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also inherits the current builtins. Patch by Victor Stinner.
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..
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.. bpo: 42990
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.. date: 2021-02-17-19-02-21
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.. nonce: SKXHiI
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.. section: Core and Builtins
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Functions have a new ``__builtins__`` attribute which is used to look for
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builtin symbols when a function is executed, instead of looking into
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``__globals__['__builtins__']``. Patch by Mark Shannon and Victor Stinner.
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..
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.. bpo: 43149
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.. date: 2021-02-07-03-27-14
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.. nonce: 0umPKD
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.. section: Core and Builtins
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Improve the error message in the parser for exception groups without
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parentheses. Patch by Pablo Galindo.
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..
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.. bpo: 43121
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.. date: 2021-02-03-22-33-05
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.. nonce: jqcViq
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.. section: Core and Builtins
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Fixed an incorrect :exc:`SyntaxError` message for missing comma in literals.
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Patch by Pablo Galindo.
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..
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.. bpo: 42819
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.. date: 2021-01-04-23-54-34
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.. nonce: 4KO6wU
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.. section: Core and Builtins
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:mod:`readline`: Explicitly disable bracketed paste in the interactive
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interpreter, even if it's set in the inputrc, is enabled by default (eg GNU
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Readline 8.1), or a user calls ``readline.read_init_file()``. The Python
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REPL has not implemented bracketed paste support. Also, bracketed mode
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writes the ``"\x1b[?2004h"`` escape sequence into stdout which causes test
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failures in applications that don't support it. It can still be explicitly
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enabled by calling ``readline.parse_and_bind("set enable-bracketed-paste
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on")``. Patch by Dustin Rodrigues.
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..
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.. bpo: 42808
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.. date: 2021-01-02-05-10-58
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.. nonce: AOxgxl
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.. section: Core and Builtins
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Simple calls to ``type(object)`` are now faster due to the ``vectorcall``
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calling convention. Patch by Dennis Sweeney.
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..
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.. bpo: 42217
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.. date: 2020-10-31-16-54-00
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.. nonce: GdcHe5
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.. section: Core and Builtins
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Make the compiler merges same co_code and co_linetable objects in a module
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like already did for co_consts.
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..
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.. bpo: 41972
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.. date: 2020-10-23-23-17-23
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.. nonce: kbAwg4
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.. section: Core and Builtins
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Substring search functions such as ``str1 in str2`` and ``str2.find(str1)``
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now sometimes use the "Two-Way" string comparison algorithm to avoid
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quadratic behavior on long strings.
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..
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.. bpo: 42128
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.. date: 2020-10-23-08-54-04
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.. nonce: SWmVEm
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.. section: Core and Builtins
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Implement :pep:`634` (structural pattern matching). Patch by Brandt Bucher.
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..
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.. bpo: 40692
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.. date: 2020-05-19-22-10-05
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.. nonce: ajEhrR
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.. section: Core and Builtins
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In the :class:`concurrent.futures.ProcessPoolExecutor`, validate that
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:func:`multiprocess.synchronize` is available on a given platform and rely
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on that check in the :mod:`concurrent.futures` test suite so we can run
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tests that are unrelated to :class:`ProcessPoolExecutor` on those platforms.
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..
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.. bpo: 38302
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.. date: 2019-09-28-12-23-23
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.. nonce: hsCNgX
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.. section: Core and Builtins
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If :func:`object.__ipow__` returns :const:`NotImplemented`, the operator
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will correctly fall back to :func:`object.__pow__` and
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:func:`object.__rpow__` as expected.
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..
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.. bpo: 43316
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.. date: 2021-02-25-09-44-36
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.. nonce: k9Gyqn
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.. section: Library
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The ``python -m gzip`` command line application now properly fails when
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detecting an unsupported extension. It exits with a non-zero exit code and
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prints an error message to stderr.
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..
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.. bpo: 43317
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.. date: 2021-02-25-09-08-55
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.. nonce: qrOOpB
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.. section: Library
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Set the chunk size for the ``gzip`` module main function to
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io.DEFAULT_BUFFER_SIZE. This is slightly faster than the 1024 bytes constant
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that was used previously.
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..
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.. bpo: 43146
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.. date: 2021-02-23-17-20-16
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.. nonce: JAFplg
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.. section: Library
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Handle None in single-arg versions of :func:`~traceback.print_exception` and
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:func:`~traceback.format_exception`.
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..
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.. bpo: 43260
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.. date: 2021-02-20-12-15-29
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.. nonce: 6znAas
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.. section: Library
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Fix TextIOWrapper can not flush internal buffer forever after very large
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text is written.
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..
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.. bpo: 43258
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.. date: 2021-02-18-23-30-52
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.. nonce: LeU-q8
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.. section: Library
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Prevent needless allocation of :mod:`sqlite3` aggregate function context
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when no rows match an aggregate query. Patch by Erlend E. Aasland.
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..
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.. bpo: 43251
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.. date: 2021-02-18-14-24-42
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.. nonce: n6WZDw
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.. section: Library
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Improve :mod:`sqlite3` error handling: ``sqlite3_column_name()`` failures
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now result in :exc:`MemoryError`. Patch by Erlend E. Aasland.
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..
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.. bpo: 40956
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.. date: 2021-02-10-23-29-50
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.. nonce: LcAbwG
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.. section: Library
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Fix segfault in :meth:`sqlite3.Connection.backup` if no argument was
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provided. The regression was introduced by PR 23838. Patch by Erlend E.
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Aasland.
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..
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.. bpo: 43172
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.. date: 2021-02-10-06-00-53
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.. nonce: ZMCJni
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.. section: Library
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The readline module now passes its tests when built directly against
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libedit. Existing irreconcilable API differences remain in
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:func:`readline.get_begidx` and :func:`readline.get_endidx` behavior based
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on libreadline vs libedit use.
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..
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.. bpo: 43163
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.. date: 2021-02-08-21-13-51
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.. nonce: E2MgzH
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.. section: Library
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Fix a bug in :mod:`codeop` that was causing it to not ask for more input
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when multi-line snippets have unclosed parentheses. Patch by Pablo Galindo
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..
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.. bpo: 43162
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.. date: 2021-02-08-16-27-00
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.. nonce: t-W7h3
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.. section: Library
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deprecate unsupported ability to access enum members as attributes of other
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enum members
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..
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.. bpo: 43146
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.. date: 2021-02-06-21-21-35
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.. nonce: MHtb2v
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.. section: Library
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Fix recent regression in None argument handling in :mod:`~traceback` module
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functions.
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..
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.. bpo: 43102
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.. date: 2021-02-03-22-55-27
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.. nonce: TSlZ6J
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.. section: Library
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The namedtuple __new__ method had its __builtins__ set to None instead of an
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actual dictionary. This created problems for introspection tools.
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..
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.. bpo: 43106
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.. date: 2021-02-03-17-06-38
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.. nonce: SwcSuU
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.. section: Library
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Added :const:`~os.O_EVTONLY`, :const:`~os.O_FSYNC`, :const:`~os.O_SYMLINK` and
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:const:`~os.O_NOFOLLOW_ANY` for macOS. Patch by Donghee Na.
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..
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.. bpo: 42960
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.. date: 2021-01-18-21-07-20
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.. nonce: a7Dote
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.. section: Library
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Adds :const:`resource.RLIMIT_KQUEUES` constant from FreeBSD to the
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:mod:`resource` module.
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..
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.. bpo: 42151
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.. date: 2020-10-26-18-01-09
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.. nonce: et5f7s
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.. section: Library
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Make the pure Python implementation of :mod:`xml.etree.ElementTree` behave
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the same as the C implementation (:mod:`_elementree`) regarding default
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attribute values (by not setting ``specified_attributes=1``).
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..
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.. bpo: 29753
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.. date: 2020-05-02-01-01-30
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.. nonce: n2M-AF
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.. section: Library
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In ctypes, now packed bitfields are calculated properly and the first item
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of packed bitfields is now shrank correctly.
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..
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.. bpo: 27646
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.. date: 2021-02-20-00-09-13
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.. nonce: HRsmo-
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.. section: Documentation
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Clarify that 'yield from <expr>' works with any iterable, not just
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iterators.
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..
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.. bpo: 36346
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.. date: 2020-06-15-10-45-45
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.. nonce: H0sS_i
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.. section: Documentation
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Update some deprecated unicode APIs which are documented as "will be removed
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in 4.0" to "3.12". See :pep:`623` for detail.
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..
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.. bpo: 43288
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.. date: 2021-02-21-11-11-53
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.. nonce: LfTvL-
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.. section: Tests
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Fix test_importlib to correctly skip Unicode file tests if the filesystem
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does not support them.
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..
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.. bpo: 43174
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.. date: 2021-02-10-14-11-53
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.. nonce: F9zwXQ
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.. section: Build
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Windows build now uses ``/utf-8`` compiler option.
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..
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.. bpo: 43103
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.. date: 2021-02-02-16-26-44
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.. nonce: VWeyP_
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.. section: Build
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Add a new configure ``--without-static-libpython`` option to not build the
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``libpythonMAJOR.MINOR.a`` static library and not install the ``python.o``
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object file.
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..
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.. bpo: 13501
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.. date: 2021-01-10-22-25-23
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.. nonce: g4L-6R
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.. section: Build
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The configure script can now use *libedit* instead of *readline* with the
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command line option ``--with-readline=editline``.
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..
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.. bpo: 42603
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.. date: 2020-12-08-19-25-20
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.. nonce: mXs2dB
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.. section: Build
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Make configure script use pkg-config to detect the location of Tcl/Tk
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headers and libraries, used to build tkinter.
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On macOS, a Tcl/Tk configuration provided by pkg-config will be preferred
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over Tcl/Tk frameworks installed in ``/{System/,}Library/Frameworks``. If
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both exist and the latter is preferred, the appropriate ``--with-tcltk-*``
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configuration options need to be explicitly set.
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..
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.. bpo: 39448
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.. date: 2020-01-24-12-54-22
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.. nonce: k4pv14
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.. section: Build
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Add the "regen-frozen" makefile target that regenerates the code for the
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frozen ``__hello__`` module.
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..
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.. bpo: 43155
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.. date: 2021-02-10-04-16-51
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.. nonce: O1tURk
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.. section: Windows
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:c:func:`PyCMethod_New` is now present in ``python3.lib``.
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..
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.. bpo: 41837
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.. date: 2021-02-28-22-49-46
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.. nonce: 9fqyXC
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.. section: macOS
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Update macOS installer build to use OpenSSL 1.1.1j.
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..
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.. bpo: 43283
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.. date: 2021-02-21-16-30-10
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.. nonce: DLBwYn
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.. section: IDLE
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Document why printing to IDLE's Shell is often slower than printing to a
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system terminal and that it can be made faster by pre-formatting a single
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string before printing.
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..
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.. bpo: 43278
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.. date: 2021-02-21-15-30-38
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.. nonce: DMPaWH
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.. section: C API
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Always put compiler and system information on the first line of the REPL
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welcome message.
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..
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.. bpo: 43270
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.. date: 2021-02-19-14-28-26
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.. nonce: UKx4XN
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.. section: C API
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Remove the private ``_PyErr_OCCURRED()`` macro: use the public
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:c:func:`PyErr_Occurred` function instead.
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..
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.. bpo: 35134
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.. date: 2021-02-18-18-46-42
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.. nonce: dFpEDT
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.. section: C API
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Move odictobject.h, parser_interface.h, picklebufobject.h, pydebug.h, and
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pyfpe.h into the cpython/ directory. They must not be included directly, as
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they are already included by Python.h: :ref:`Include Files <api-includes>`.
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..
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.. bpo: 35134
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.. date: 2021-02-17-18-51-26
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.. nonce: YoQdk8
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.. section: C API
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Move pyarena.h, pyctype.h, and pytime.h into the cpython/ directory. They
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must not be included directly, as they are already included by Python.h:
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:ref:`Include Files <api-includes>`.
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..
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.. bpo: 40170
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.. date: 2021-02-16-22-29-39
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.. nonce: ahHmOo
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.. section: C API
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:c:func:`PyExceptionClass_Name` is now always declared as a function, in
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order to hide implementation details. The macro accessed
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:c:member:`PyTypeObject.tp_name` directly. Patch by Erlend E. Aasland.
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..
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.. bpo: 43239
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.. date: 2021-02-16-17-30-16
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.. nonce: FQqOGz
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.. section: C API
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The :c:func:`PyCFunction_New` function is now exported in the ABI when
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compiled with ``-fvisibility=hidden``.
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..
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.. bpo: 40170
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.. date: 2021-02-15-15-06-43
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.. nonce: ZYeSii
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.. section: C API
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:c:func:`PyIter_Check` is now always declared as a function, in order to
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hide implementation details. The macro accessed
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:c:member:`PyTypeObject.tp_iternext` directly. Patch by Erlend E. Aasland.
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..
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.. bpo: 40170
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.. date: 2021-02-15-13-41-14
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.. nonce: r2FAtl
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.. section: C API
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Convert :c:func:`PyDescr_IsData` macro to a function to hide implementation
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details: The macro accessed :c:member:`PyTypeObject.tp_descr_set` directly.
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Patch by Erlend E. Aasland.
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..
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.. bpo: 43181
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.. date: 2021-02-11-11-37-14
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.. nonce: ydv33S
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.. section: C API
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Convert :c:func:`PyObject_TypeCheck` macro to a static inline function.
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Patch by Erlend E. Aasland.
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