mirror of https://github.com/python/cpython
Add the blurbify of the 3.10.0b1 changelog to the main branch (GH-25976)
This commit is contained in:
Ned Deily
GitHub
parent
4d4be47705
commit
164d6e1bb1
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Implement :pep:`644`. Python now requires OpenSSL 1.1.1 or newer.
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Improved generated code refresh (AST/tokens/opcodes/keywords) on Windows.
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Add the :c:func:`Py_Is(x, y) <Py_Is>` function to test if the *x* object is the
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*y* object, the same as ``x is y`` in Python. Add also the :c:func:`Py_IsNone`,
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:c:func:`Py_IsTrue`, :c:func:`Py_IsFalse` functions to test if an object is,
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respectively, the ``None`` singleton, the ``True`` singleton or the ``False``
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singleton.
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Patch by Victor Stinner.
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Stable ABI and limited API definitions are generated from a central manifest
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(:pep:`652`).
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:c:func:`PyOS_ReadlineFunctionPointer` is no longer exported by limited C API
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headers and by ``python3.dll`` on Windows. Like any function that takes
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``FILE*``, it is not part of the stable ABI.
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:c:func:`PyMem_Calloc` is now available in the limited C API
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(``Py_LIMITED_API``).
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Introduce :const:`Py_TPFLAGS_IMMUTABLETYPE` flag for immutable type objects, and
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modify :c:func:`PyType_Ready` to set it for static types. Patch by
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Erlend E. Aasland.
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Add new C-API functions to control the state of the garbage collector:
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:c:func:`PyGC_Enable()`, :c:func:`PyGC_Disable()`, :c:func:`PyGC_IsEnabled()`,
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corresponding to the functions in the :mod:`gc` module.
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_PyInterpreterState_IDIncref() now calls _PyInterpreterState_IDInitref() and
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always increments id_refcount. Previously, calling
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_xxsubinterpreters.get_current() could create an id_refcount inconsistency
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when a _xxsubinterpreters.InterpreterID object was deallocated. Patch by
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Victor Stinner.
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@ -1,5 +0,0 @@
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Remove the now unused ``PYMALLOC_DEBUG`` macro. Debug hooks on memory
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allocators are now installed by default if Python is built in debug mode (if
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``Py_DEBUG`` macro is defined). Moreover, they can now be used on Python
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build in release mode (ex: using ``PYTHONMALLOC=debug`` environment
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variable).
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Add a new :c:data:`Py_TPFLAGS_DISALLOW_INSTANTIATION` type flag to disallow
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creating type instances. Patch by Victor Stinner.
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When printing :exc:`AttributeError`, :c:func:`PyErr_Display` will offer
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suggestions of similar attribute names in the object that the exception was
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raised from. Patch by Pablo Galindo
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Prevented crashes in the AST validator and optimizer when compiling some
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absurdly long expressions like ``"+0"*1000000``. :exc:`RecursionError` is
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now raised instead.
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Static methods (:func:`@staticmethod <staticmethod>`) are now callable as
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regular functions. Patch by Victor Stinner.
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Importlib now resolves relative paths when creating module spec objects from
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file locations.
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Add GEN_START opcode. Marks start of generator, including async, or coroutine and handles
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sending values to a newly created generator or coroutine.
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:data:`~object.__match_args__` is no longer allowed to be a list.
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Fixed a bug where ``anext(ait, default)`` would erroneously return None.
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Static methods (:func:`@staticmethod <staticmethod>`) and class methods
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(:func:`@classmethod <classmethod>`) now inherit the method attributes
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(``__module__``, ``__name__``, ``__qualname__``, ``__doc__``,
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``__annotations__``) and have a new ``__wrapped__`` attribute.
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Patch by Victor Stinner.
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Move the flag for checking whether tracing is enabled to the C stack, from the heap.
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Should speed up dispatch in the interpreter.
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Improve ``SyntaxError`` error messages for invalid comparisons. Patch by
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Pablo Galindo.
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:class:`ast.alias` nodes now include source location metadata attributes e.g. lineno, col_offset.
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Improve syntax errors in the parser for missing commas between expressions.
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Patch by Pablo Galindo.
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Improve syntax errors for invalid dictionary literals. Patch by Pablo
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Galindo.
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When printing :exc:`NameError` raised by the interpreter,
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:c:func:`PyErr_Display` will offer suggestions of similar variable names in
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the function that the exception was raised from. Patch by Pablo Galindo
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Data stack usage is much reduced for large literal and call expressions.
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Constant tuple folding in bytecode optimizer now reuses tuple in constant
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table.
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Improve the error message for :exc:`IndentationError` exceptions. Patch by
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Pablo Galindo
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Hashes of NaN values now depend on object identity. Formerly, they always
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hashed to 0 even though NaN values are not equal to one another. Having the
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same hash for unequal values caused pile-ups in hash tables.
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Revert making ``from __future__ import annotations`` the default. This follows
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the Steering Council decision to postpone PEP 563 changes to at least Python
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3.11. See the original email for more information regarding the decision:
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https://mail.python.org/archives/list/python-dev@python.org/thread/CLVXXPQ2T2LQ5MP2Y53VVQFCXYWQJHKZ/.
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Patch by Pablo Galindo.
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:exc:`SyntaxError` exceptions raised by the intepreter will highlight the
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full error range of the expression that consistutes the syntax error itself,
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instead of just where the problem is detected. Patch by Pablo Galindo.
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Annotations for complex targets (everything beside simple names) no longer
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cause any runtime effects with ``from __future__ import annotations``.
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When performing structural pattern matching (:pep:`634`), captured names are
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now left unbound until the *entire* pattern has matched successfully.
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Usage of ``await``/``yield``/``yield from`` and named expressions within an
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annotation is now forbidden when PEP 563 is activated.
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Match patterns now use new dedicated AST nodes (``MatchValue``,
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``MatchSingleton``, ``MatchSequence``, ``MatchStar``, ``MatchMapping``,
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``MatchClass``) rather than reusing expression AST nodes. ``MatchAs`` and
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``MatchOr`` are now defined as pattern nodes rather than as expression nodes.
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Patch by Nick Coghlan.
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Change class and module objects to lazy-create empty annotations dicts on
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demand. The annotations dicts are stored in the object's __dict__ for
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backwards compatibility.
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Make the :class:`array.array` type immutable. Patch by
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Erlend E. Aasland.
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Make :mod:`re` types immutable. Patch by
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Erlend E. Aasland.
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The internal representation of line number tables is changed to not use
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sentinels, and an explicit length parameter is added to the out of process
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API function ``PyLineTable_InitAddressRange``. This makes the handling of
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line number tables more robust in some circumstances.
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Importing the :mod:`_signal` module in a subinterpreter has no longer side
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effects.
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If the current position in a frame has no line number then set the f_lineno
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attribute to None, instead of -1, to conform to PEP 626. This should not
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normally be possible, but might occur in some unusual circumstances.
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Set frame.f_lineno to the line number of the 'with' kweyword when executing
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the call to ``__exit__``.
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Restore proper validation of complex literal value patterns when parsing
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:keyword:`!match` blocks.
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Use :c:member:`~PyTypeObject.tp_flags` on the class object to determine if the subject is a sequence
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or mapping when pattern matching. Avoids the need to import :mod:`collections.abc` when pattern matching.
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Prevent classes being both a sequence and a mapping when pattern matching.
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Fixing the example code in Doc/extending/extending.rst to declare and initialize the pmodule variable to be of the right type.
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Update documentation to reflect that unparenthesized lambda expressions can
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no longer be the expression part in an ``if`` clause in comprehensions and
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generator expressions since Python 3.9.
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Fix the Sphinx glossary_search extension: create the _static/ sub-directory
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if it doesn't exist.
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Update dataclasses documentation to express that FrozenInstanceError is
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derived from AttributeError.
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The documentation on the PyContextVar C-API was clarified.
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Document the new :const:`Py_TPFLAGS_MAPPING` and
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:const:`Py_TPFLAGS_SEQUENCE` type flags.
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Add "Annotations Best Practices" document as a new HOWTO.
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IDLE's shell now shows prompts in a separate side-bar.
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IDLE dialog windows are now recognized as dialogs by window managers on
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macOS and X Window.
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Indent IDLE Shell input with spaces instead of tabs
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Fix reference leak in test_squeezer. Patch by Pablo Galindo
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Add mouse actions to the shell sidebar. Left click and optional drag
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selects one or more lines, as with the editor line number sidebar. Right
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click after selecting raises a context menu with 'copy with prompts'. This
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zips together prompts from the sidebar with lines from the selected text.
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Fix a regression in the handling of ctypes' :data:`ctypes.c_wchar_p` type:
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embedded null characters would cause a :exc:`ValueError` to be raised. Patch
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by Zackery Spytz.
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Provide a locale.localize() function, which converts a normalized number string
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into a locale format.
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Covariance, Pearson's correlation, and simple linear regression functionality was added to statistics module. Patch by Tymoteusz Wołodźko.
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Added SNI support to :func:`ssl.get_server_certificate`.
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:func:`os.path.expanduser()` now refuses to guess Windows home directories if the basename of current user's home directory does not match their username.
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:meth:`pathlib.Path.expanduser()` and :meth:`~pathlib.Path.home()` now consistently raise :exc:`RuntimeError` exception when a home directory cannot be resolved. Previously a :exc:`KeyError` exception could be raised on Windows when the ``"USERNAME"`` environment variable was unset.
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:meth:`pathlib.Path.stat` and :meth:`~pathlib.Path.chmod` now accept a *follow_symlinks* keyword-only argument for consistency with corresponding functions in the :mod:`os` module.
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:func:`ssl.RAND_status` now returns a boolean value (as documented) instead
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of ``1`` or ``0``.
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Expose X509_V_FLAG_PARTIAL_CHAIN ssl flag
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Fix dataclasses with ``InitVar``\s and :func:`~dataclasses.replace()`. Patch
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by Claudiu Popa.
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Fix thread locks in zlib module may go wrong in rare case. Patch by Ma Lin.
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The :func:`ssl.get_server_certificate` function now has a *timeout*
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parameter.
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Use a new output buffer management code for :mod:`bz2` / :mod:`lzma` /
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:mod:`zlib` modules, and add ``.readall()`` function to
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``_compression.DecompressReader`` class. These bring some performance
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improvements. Patch by Ma Lin.
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Certificate and PrivateKey classes were added to the ssl module.
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Certificates and keys can now be loaded from memory buffer, too.
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Deprecated use of :func:`asyncio.get_event_loop` without running event loop.
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Emit deprecation warning for :mod:`asyncio` functions which implicitly
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create a :class:`~asyncio.Future` or :class:`~asyncio.Task` objects if there
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is no running event loop and no explicit *loop* argument is passed:
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:func:`~asyncio.ensure_future`, :func:`~asyncio.wrap_future`,
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:func:`~asyncio.gather`, :func:`~asyncio.shield`,
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:func:`~asyncio.as_completed` and constructors of :class:`~asyncio.Future`,
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:class:`~asyncio.Task`, :class:`~asyncio.StreamReader`,
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:class:`~asyncio.StreamReaderProtocol`.
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Add ``slots`` parameter to ``dataclasses.dataclass`` decorator to
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automatically generate ``__slots__`` for class. Patch provided by Yurii
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Karabas.
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:func:`typing.get_type_hints` now checks the local namespace of a class when
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evaluating :pep:`563` annotations inside said class.
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Add `pathlib.Path.hardlink_to()` method that supersedes `link_to()`. The new
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method has the same argument order as `symlink_to()`.
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:mod:`pprint` now has support for :class:`dataclasses.dataclass`. Patch by Lewis Gaul.
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Fixed processing of a dataclass that inherits from a frozen dataclass with no fields. It is now correctly detected as an error.
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:mod:`distutils.sysconfig` has been merged to :mod:`sysconfig`.
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Install schemes in :mod:`distutils.command.install` are now loaded from
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:mod:`sysconfig`.
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Improve :meth:`sqlite3.Connection.backup` error handling. The error message
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for non-existant target database names is now ``unknown database <database
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name>`` instead of ``SQL logic error``. Patch by Erlend E. Aasland.
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New functions :func:`sysconfig.get_preferred_scheme` and
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:func:`sysconfig.get_default_scheme` are added to query a platform for its
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preferred "user", "home", and "prefix" (default) scheme names.
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Improve :mod:`sqlite3` error handling: ``sqlite3_value_blob()`` errors that
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set ``SQLITE_NOMEM`` now raise :exc:`MemoryError`. Patch by Erlend E.
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Aasland.
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Allow :class:`bytes` ``separator`` argument in ``urllib.parse.parse_qs`` and
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``urllib.parse.parse_qsl`` when parsing :class:`str` query strings. Previously,
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this raised a ``TypeError``.
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Improve error message for :func:`tarfile.open` when :mod:`lzma` / :mod:`bz2`
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are unavailable. Patch by Anthony Sottile.
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Fix problem with :attr:`~ssl.SSLContext.hostname_checks_common_name`. OpenSSL does not copy hostflags from *struct SSL_CTX* to *struct SSL*.
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Add the ability to specify keyword-only fields to dataclasses. These fields
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will become keyword-only arguments to the generated __init__.
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:func:`turtle.textinput` and :func:`turtle.numinput` create now a transient
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window working on behalf of the canvas window.
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Deprecate find_module() and find_loader() implementations in importlib and
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zipimport.
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@ -1,19 +0,0 @@
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The following ``threading`` methods are now deprecated and should be replaced:
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- ``currentThread`` => :func:`threading.current_thread`
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- ``activeCount`` => :func:`threading.active_count`
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- ``Condition.notifyAll`` => :meth:`threading.Condition.notify_all`
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- ``Event.isSet`` => :meth:`threading.Event.is_set`
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- ``Thread.setName`` => :attr:`threading.Thread.name`
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- ``thread.getName`` => :attr:`threading.Thread.name`
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- ``Thread.isDaemon`` => :attr:`threading.Thread.daemon`
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- ``Thread.setDaemon`` => :attr:`threading.Thread.daemon`
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Patch by Jelle Zijlstra.
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:mod:`tkinter` dialog windows are now recognized as dialogs by window
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managers on macOS and X Window.
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Fix :mod:`sqlite3` regression for zero-sized blobs with converters, where
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``b""`` was returned instead of ``None``. The regression was introduced by
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GH-24723. Patch by Erlend E. Aasland.
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@ -1,2 +0,0 @@
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Fix an issue where :data:`~object.__match_args__` generation could fail for
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some :mod:`dataclasses`.
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@ -1,4 +0,0 @@
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A ``simple_enum`` decorator is added to the ``enum`` module to convert a
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normal class into an Enum. ``test_simple_enum`` added to test simple enums
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against a corresponding normal Enum. Standard library modules updated to
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use ``simple_enum``.
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@ -1,2 +0,0 @@
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Add ``encoding`` and ``errors`` parameters to :func:`fileinput.input` and
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:class:`fileinput.FileInput`.
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@ -1 +0,0 @@
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Add an ``encoding`` parameter :func:`logging.fileConfig()`.
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@ -1,3 +0,0 @@
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The ``P.args`` and ``P.kwargs`` attributes of :class:`typing.ParamSpec` are
|
||||
now instances of the new classes :class:`typing.ParamSpecArgs` and
|
||||
:class:`typing.ParamSpecKwargs`, which enables a more useful ``repr()``. Patch by Jelle Zijlstra.
|
||||
|
|
@ -1,3 +0,0 @@
|
|||
In ``importlib.metadata``, incorporate changes from importlib_metadata 3.10:
|
||||
Add mtime-based caching during distribution discovery. Flagged use of dict
|
||||
result from ``entry_points()`` as deprecated.
|
||||
|
|
@ -1,3 +0,0 @@
|
|||
:func:`os.path.realpath` now accepts a *strict* keyword-only argument.
|
||||
When set to ``True``, :exc:`OSError` is raised if a path doesn't exist
|
||||
or a symlink loop is encountered.
|
||||
|
|
@ -1,2 +0,0 @@
|
|||
Implement :pep:`647` in the :mod:`typing` module by adding
|
||||
:data:`TypeGuard`.
|
||||
|
|
@ -1,4 +0,0 @@
|
|||
The header files for :mod:`ssl` error codes are now OpenSSL
|
||||
version-specific. Exceptions will now show correct reason and library
|
||||
codes. The ``make_ssl_data.py`` script has been rewritten to use OpenSSL's
|
||||
text file with error codes.
|
||||
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Reference in New Issue