mirror of https://github.com/python/cpython
bpo-41137: Reorganize What's New in Python 3.11 (GH-28518)
* Merge the two Removed sections. * Move "Build Changes" at the end, before "C API Changes". * Move the pdb change in Porting to Python 3.11. * Move C API new features in their section.
This commit is contained in:
Victor Stinner
GitHub
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commit
ec7ffa4b5b
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@ -250,6 +250,68 @@ unicodedata
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* The Unicode database has been updated to version 14.0.0. (:issue:`45190`).
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Optimizations
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=============
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* Compiler now optimizes simple C-style formatting with literal format
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containing only format codes ``%s``, ``%r`` and ``%a`` and makes it as
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fast as corresponding f-string expression.
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(Contributed by Serhiy Storchaka in :issue:`28307`.)
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* "Zero-cost" exceptions are implemented. The cost of ``try`` statements is
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almost eliminated when no exception is raised.
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(Contributed by Mark Shannon in :issue:`40222`.)
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* Method calls with keywords are now faster due to bytecode
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changes which avoid creating bound method instances. Previously, this
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optimization was applied only to method calls with purely positional
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arguments.
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(Contributed by Ken Jin and Mark Shannon in :issue:`26110`, based on ideas
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implemented in PyPy.)
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* Pure ASCII strings are now normalized in constant time by :func:`unicodedata.normalize`.
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(Contributed by Dong-hee Na in :issue:`44987`.)
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CPython bytecode changes
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========================
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* Added a new :opcode:`CALL_METHOD_KW` opcode. Calls a method in a similar
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fashion as :opcode:`CALL_METHOD`, but also supports keyword arguments. Works
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in tandem with :opcode:`LOAD_METHOD`.
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Deprecated
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==========
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* The :mod:`lib2to3` package is now deprecated and may not be able to parse
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Python 3.10 or newer. See the :pep:`617` (New PEG parser for CPython).
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(Contributed by Victor Stinner in :issue:`40360`.)
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* :class:`webbrowser.MacOSX` is deprecated and will be removed in Python 3.13.
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It is untested and undocumented and also not used by webbrowser itself.
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(Contributed by Dong-hee Na in :issue:`42255`.)
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* The behavior of returning a value from a :class:`~unittest.TestCase` and
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:class:`~unittest.IsolatedAsyncioTestCase` test methods (other than the
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default ``None`` value), is now deprecated.
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* Deprecated the following :mod:`unittest` functions, scheduled for removal in
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Python 3.13:
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* :func:`unittest.findTestCases`
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* :func:`unittest.makeSuite`
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* :func:`unittest.getTestCaseNames`
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Use :class:`~unittest.TestLoader` method instead:
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* :meth:`unittest.TestLoader.loadTestsFromModule`
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* :meth:`unittest.TestLoader.loadTestsFromTestCase`
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* :meth:`unittest.TestLoader.getTestCaseNames`
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(Contributed by Erlend E. Aasland in :issue:`5846`.)
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Removed
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=======
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@ -323,81 +385,6 @@ Removed
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deprecated since Python 3.2.
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(Contributed by Hugo van Kemenade in :issue:`45173`.)
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Optimizations
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=============
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* Compiler now optimizes simple C-style formatting with literal format
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containing only format codes ``%s``, ``%r`` and ``%a`` and makes it as
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fast as corresponding f-string expression.
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(Contributed by Serhiy Storchaka in :issue:`28307`.)
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* "Zero-cost" exceptions are implemented. The cost of ``try`` statements is
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almost eliminated when no exception is raised.
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(Contributed by Mark Shannon in :issue:`40222`.)
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* Method calls with keywords are now faster due to bytecode
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changes which avoid creating bound method instances. Previously, this
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optimization was applied only to method calls with purely positional
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arguments.
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(Contributed by Ken Jin and Mark Shannon in :issue:`26110`, based on ideas
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implemented in PyPy.)
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* :file:`.pdbrc` is now read with ``'utf-8'`` encoding.
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* Pure ASCII strings are now normalized in constant time by :func:`unicodedata.normalize`.
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(Contributed by Dong-hee Na in :issue:`44987`.)
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CPython bytecode changes
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========================
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* Added a new :opcode:`CALL_METHOD_KW` opcode. Calls a method in a similar
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fashion as :opcode:`CALL_METHOD`, but also supports keyword arguments. Works
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in tandem with :opcode:`LOAD_METHOD`.
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Build Changes
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=============
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* CPython can now be built with the ThinLTO option via ``--with-lto=thin``.
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(Contributed by Dong-hee Na and Brett Holman in :issue:`44340`.)
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Deprecated
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==========
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* The :mod:`lib2to3` package is now deprecated and may not be able to parse
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Python 3.10 or newer. See the :pep:`617` (New PEG parser for CPython).
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(Contributed by Victor Stinner in :issue:`40360`.)
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* :class:`webbrowser.MacOSX` is deprecated and will be removed in Python 3.13.
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It is untested and undocumented and also not used by webbrowser itself.
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(Contributed by Dong-hee Na in :issue:`42255`.)
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* The behavior of returning a value from a :class:`~unittest.TestCase` and
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:class:`~unittest.IsolatedAsyncioTestCase` test methods (other than the
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default ``None`` value), is now deprecated.
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* Deprecated the following :mod:`unittest` functions, scheduled for removal in
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Python 3.13:
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* :func:`unittest.findTestCases`
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* :func:`unittest.makeSuite`
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* :func:`unittest.getTestCaseNames`
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Use :class:`~unittest.TestLoader` method instead:
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* :meth:`unittest.TestLoader.loadTestsFromModule`
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* :meth:`unittest.TestLoader.loadTestsFromTestCase`
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* :meth:`unittest.TestLoader.getTestCaseNames`
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(Contributed by Erlend E. Aasland in :issue:`5846`.)
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Removed
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=======
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* The :func:`@asyncio.coroutine <asyncio.coroutine>` :term:`decorator` enabling
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legacy generator-based coroutines to be compatible with async/await code.
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The function has been deprecated since Python 3.8 and the removal was
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@ -435,18 +422,30 @@ Changes in the Python API
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how universal newlines works.
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(Contributed by Victor Stinner in :issue:`37330`.)
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* The :mod:`pdb` module now reads the :file:`.pdbrc` configuration file with
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the ``'utf-8'`` encoding.
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(Contributed by Srinivas Reddy Thatiparthy (శ్రీనివాస్ రెడ్డి తాటిపర్తి) in :issue:`41137`.)
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Build Changes
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=============
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* CPython can now be built with the ThinLTO option via ``--with-lto=thin``.
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(Contributed by Dong-hee Na and Brett Holman in :issue:`44340`.)
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C API Changes
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=============
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New Features
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------------
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* Add a new :c:func:`PyType_GetName` function to get type's short name.
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(Contributed by Hai Shi in :issue:`42035`.)
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* Add a new :c:func:`PyType_GetQualName` function to get type's qualified name.
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(Contributed by Hai Shi in :issue:`42035`.)
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New Features
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------------
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Porting to Python 3.11
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----------------------
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