Windows

• bpo-47194 [https://bugs.python.org/issue?@action=redirect&bpo=47194]: Update zlib to v1.2.12 to resolve CVE 2018-25032 [https://www.cve.org/CVERecord?id=CVE-2018-25032].

• bpo-47171 [https://bugs.python.org/issue?@action=redirect&bpo=47171]: Enables installing the py.exe launcher on Windows ARM64.

• bpo-46566 [https://bugs.python.org/issue?@action=redirect&bpo=46566]: Upgraded 适用于Windows的Python启动器 to support a new -V:company/tag argument for full PEP 514 [https://peps.python.org/pep-0514/] support and to detect ARM64 installs. The -64 suffix on arguments is deprecated, but still selects any non-32-bit install. Setting PYLAUNCHER_ALLOW_INSTALL and specifying a version that is not installed will attempt to install the requested version from the Microsoft Store.

• bpo-47086 [https://bugs.python.org/issue?@action=redirect&bpo=47086]: The installer for Windows now includes documentation as loose HTML files rather than a single compiled .chm file.

• bpo-46907 [https://bugs.python.org/issue?@action=redirect&bpo=46907]: Update Windows installer to use SQLite 3.38.1.

• bpo-44549 [https://bugs.python.org/issue?@action=redirect&bpo=44549]: Update bzip2 to 1.0.8 in Windows builds to mitigate CVE 2016-3189 [https://www.cve.org/CVERecord?id=CVE-2016-3189] and CVE 2019-12900 [https://www.cve.org/CVERecord?id=CVE-2019-12900].

• bpo-46948 [https://bugs.python.org/issue?@action=redirect&bpo=46948]: Prevent CVE 2022-26488 [https://www.cve.org/CVERecord?id=CVE-2022-26488] by ensuring the Add to PATH option in the Windows installer uses the correct path when being repaired.

macOS

• bpo-46890 [https://bugs.python.org/issue?@action=redirect&bpo=46890]: Fix a regression in the setting of sys._base_executable in framework builds, and thereby fix a regression in venv virtual environments with such builds.

• bpo-46907 [https://bugs.python.org/issue?@action=redirect&bpo=46907]: Update macOS installer to SQLite 3.38.1.

工具/示例

• bpo-40280 [https://bugs.python.org/issue?@action=redirect&bpo=40280]: Replace Emscripten's limited shell with Katie Bell's browser-ui REPL from python-wasm project.

C API

• bpo-40421 [https://bugs.python.org/issue?@action=redirect&bpo=40421]: Add PyFrame_GetBuiltins, PyFrame_GetGenerator and PyFrame_GetGlobals C-API functions to access frame object attributes safely from C code.

• bpo-46850 [https://bugs.python.org/issue?@action=redirect&bpo=46850]: Move the private _PyFrameEvalFunction type, and private PyInterpreterStateGetEvalFrameFunc() and PyInterpreterStateSetEvalFrameFunc() functions to the internal C API. The _PyFrameEvalFunction callback function type now uses the _PyInterpreterFrame type which is part of the internal C API. Patch by Victor Stinner.

• bpo-46850 [https://bugs.python.org/issue?@action=redirect&bpo=46850]: Move the private undocumented PyEvalEvalFrameDefault() function to the internal C API. The function now uses the _PyInterpreterFrame type which is part of the internal C API. Patch by Victor Stinner.

• bpo-46850 [https://bugs.python.org/issue?@action=redirect&bpo=46850]: Remove the private undocumented function PyEvalCallTracing() from the C API. Call the public sys.call_tracing() function instead. Patch by Victor Stinner.

• bpo-46850 [https://bugs.python.org/issue?@action=redirect&bpo=46850]: Remove the private undocumented function PyEvalGetCoroutineOriginTrackingDepth() from the C API. Call the public sys.get_coroutine_origin_tracking_depth() function instead. Patch by Victor Stinner.

• bpo-46850 [https://bugs.python.org/issue?@action=redirect&bpo=46850]: Remove the following private undocumented functions from the C API:

  • PyEvalGetAsyncGenFirstiter()

  • PyEvalGetAsyncGenFinalizer()

  • PyEvalSetAsyncGenFirstiter()

  • PyEvalSetAsyncGenFinalizer()

Call the public sys.get_asyncgen_hooks() and sys.set_asyncgen_hooks() functions instead. Patch by Victor Stinner.

• bpo-46987 [https://bugs.python.org/issue?@action=redirect&bpo=46987]: Remove private functions PySysGetObjectId() and PySysSetObjectId(). Patch by Donghee Na.

• bpo-46906 [https://bugs.python.org/issue?@action=redirect&bpo=46906]: Add new functions to pack and unpack C double (serialize and deserialize): PyFloat_Pack2(), PyFloat_Pack4(), PyFloat_Pack8(), PyFloat_Unpack2(), PyFloat_Unpack4() and PyFloat_Unpack8(). Patch by Victor Stinner.

Python 3.11.0 alpha 6

Release date: 2022-03-07

核心与内置函数

• bpo-46940 [https://bugs.python.org/issue?@action=redirect&bpo=46940]: Avoid overriding AttributeError metadata information for nested attribute access calls. Patch by Pablo Galindo.

• bpo-46927 [https://bugs.python.org/issue?@action=redirect&bpo=46927]: Include the type's name in the error message for subscripting non-generic types.

• bpo-46921 [https://bugs.python.org/issue?@action=redirect&bpo=46921]: Support vectorcall for super(). Patch by Ken Jin.

• bpo-46841 [https://bugs.python.org/issue?@action=redirect&bpo=46841]: Fix incorrect handling of inline cache entries when specializing BINARY_OP.

• bpo-46841 [https://bugs.python.org/issue?@action=redirect&bpo=46841]: Use an oparg to simplify the construction of helpful error messages in GET_AWAITABLE.

• bpo-46903 [https://bugs.python.org/issue?@action=redirect&bpo=46903]: Make sure that str subclasses can be used as attribute names for instances with virtual dictionaries. Fixes regression in 3.11alpha

• bpo-46841 [https://bugs.python.org/issue?@action=redirect&bpo=46841]: Add more detailed specialization failure stats for COMPARE_OP followed by EXTENDED_ARG.

• bpo-46891 [https://bugs.python.org/issue?@action=redirect&bpo=46891]: Fix bug introduced during 3.11alpha where subclasses of types.ModuleType with __slots__ were not initialized correctly, resulting in an interpreter crash.

• bpo-46841 [https://bugs.python.org/issue?@action=redirect&bpo=46841]: Use inline caching for LOAD_ATTR, LOAD_METHOD, and STORE_ATTR.

• bpo-46841 [https://bugs.python.org/issue?@action=redirect&bpo=46841]: Use inline cache for BINARY_SUBSCR.

• bpo-46841 [https://bugs.python.org/issue?@action=redirect&bpo=46841]: Use inline caching for COMPARE_OP.

• bpo-46864 [https://bugs.python.org/issue?@action=redirect&bpo=46864]: Deprecate PyBytesObject.ob_shash. It will be removed in Python 3.13.

• bpo-46841 [https://bugs.python.org/issue?@action=redirect&bpo=46841]: Use inline caching for UNPACK_SEQUENCE.

• bpo-46845 [https://bugs.python.org/issue?@action=redirect&bpo=46845]: Reduces dict size by removing hash value from hash table when all inserted keys are Unicode. For example, sys.getsizeof(dict.fromkeys("abcdefg")) becomes 272 bytes from 352 bytes on 64bit platform.

• bpo-46841 [https://bugs.python.org/issue?@action=redirect&bpo=46841]: Use inline cache for LOAD_GLOBAL.

• bpo-46852 [https://bugs.python.org/issue?@action=redirect&bpo=46852]: Rename the private undocumented float._setformat__() method to float.__setformat__() to fix a typo introduced in Python 3.7. The method is only used by test_float. Patch by Victor Stinner.

• bpo-46852 [https://bugs.python.org/issue?@action=redirect&bpo=46852]: Remove the undocumented private float._setformat__() method, previously known as float.__setformat__() in Python 3.7. Its docstring said: "You probably don't want to use this function. It exists mainly to be used in Python's test suite." Patch by Victor Stinner.

• bpo-40116 [https://bugs.python.org/issue?@action=redirect&bpo=40116]: Fix regression that dict.update(other) may don't respect iterate order of other when other is key sharing dict.

• bpo-46712 [https://bugs.python.org/issue?@action=redirect&bpo=46712]: Share global string identifiers in deep-frozen modules.

• bpo-46430 [https://bugs.python.org/issue?@action=redirect&bpo=46430]: Fix memory leak in interned strings of deep-frozen modules.

• bpo-46841 [https://bugs.python.org/issue?@action=redirect&bpo=46841]: Store BINARY_OP caches inline using a new CACHE instruction.

• bpo-45107 [https://bugs.python.org/issue?@action=redirect&bpo=45107]: Specialize LOAD_METHOD for instances with a dict.

• bpo-44337 [https://bugs.python.org/issue?@action=redirect&bpo=44337]: Reduce the memory usage of specialized LOAD_ATTR and STORE_ATTR instructions.

• bpo-46729 [https://bugs.python.org/issue?@action=redirect&bpo=46729]: Add number of sub-exceptions to BaseException.__str__().

• bpo-45885 [https://bugs.python.org/issue?@action=redirect&bpo=45885]: Don't un-adapt COMPARE_OP when collecting specialization stats.

• bpo-46329 [https://bugs.python.org/issue?@action=redirect&bpo=46329]: Fix specialization stats gathering for PRECALL instructions.

• bpo-46794 [https://bugs.python.org/issue?@action=redirect&bpo=46794]: Bump up the libexpat version into 2.4.6

• bpo-46823 [https://bugs.python.org/issue?@action=redirect&bpo=46823]: Implement a specialized combined opcode LOAD_FAST__LOAD_ATTR_INSTANCE_VALUE. Patch by Dennis Sweeney.

• bpo-46820 [https://bugs.python.org/issue?@action=redirect&bpo=46820]: Fix parsing a numeric literal immediately (without spaces) followed by "not in" keywords, like in 1not in x. Now the parser only emits a warning, not a syntax error.

• bpo-46329 [https://bugs.python.org/issue?@action=redirect&bpo=46329]: Move KW_NAMES before PRECALL instruction in call sequence. Change operand of CALL to match PRECALL for easier specialization.

• bpo-46808 [https://bugs.python.org/issue?@action=redirect&bpo=46808]: Remove the NEXT_BLOCK macro from compile.c, and make the compiler automatically generate implicit blocks when they are needed.

• bpo-46329 [https://bugs.python.org/issue?@action=redirect&bpo=46329]: Add PUSH_NULL instruction. This is used as a prefix when evaluating a callable, so that the stack has the same shape for methods and other calls. PRECALL_FUNCTION and PRECALL_METHOD are merged into a single PRECALL instruction.

There is no change in semantics.

• bpo-46762 [https://bugs.python.org/issue?@action=redirect&bpo=46762]: Fix an assert failure in debug builds when a '<', '>', or '=' is the last character in an fstring that's missing a closing right brace.

• bpo-46730 [https://bugs.python.org/issue?@action=redirect&bpo=46730]: Message of AttributeError caused by getting, setting or deleting a property without the corresponding function now mentions that the attribute is in fact a property and also specifies type of the class that it belongs to.

• bpo-46724 [https://bugs.python.org/issue?@action=redirect&bpo=46724]: Make sure that all backwards jumps use the JUMP_ABSOLUTE instruction, rather than JUMP_FORWARD with an argument of (2**32)+offset.

• bpo-46732 [https://bugs.python.org/issue?@action=redirect&bpo=46732]: Correct the docstring for the __bool__() method. Patch by Jelle Zijlstra.

• bpo-46072 [https://bugs.python.org/issue?@action=redirect&bpo=46072]: Add more detailed specialization failure statistics for BINARY_OP.

• bpo-46707 [https://bugs.python.org/issue?@action=redirect&bpo=46707]: Avoid potential exponential backtracking when producing some syntax errors involving lots of brackets. Patch by Pablo Galindo.

• bpo-46323 [https://bugs.python.org/issue?@action=redirect&bpo=46323]: ctypes now allocates memory on the stack instead of on the heap to pass arguments while calling a Python callback function. Patch by Donghee Na.

• bpo-45923 [https://bugs.python.org/issue?@action=redirect&bpo=45923]: Add a quickened form of RESUME that skips quickening checks.

• bpo-46702 [https://bugs.python.org/issue?@action=redirect&bpo=46702]: Specialize UNPACK_SEQUENCE for tuple and list unpackings.

• bpo-46072 [https://bugs.python.org/issue?@action=redirect&bpo=46072]: Opcode pair stats are now gathered with --enable-pystats. Defining DYNAMIC_EXECUTION_PROFILE or DXPAIRS no longer has any effect.

• bpo-46675 [https://bugs.python.org/issue?@action=redirect&bpo=46675]: Allow more than 16 items in a split dict before it is combined. The limit is now 254.

• bpo-40479 [https://bugs.python.org/issue?@action=redirect&bpo=40479]: Add a missing call to va_end() in Modules/_hashopenssl.c.

• bpo-46323 [https://bugs.python.org/issue?@action=redirect&bpo=46323]: Use PyObject_Vectorcall() while calling ctypes callback function. Patch by Donghee Na.

• bpo-46615 [https://bugs.python.org/issue?@action=redirect&bpo=46615]: When iterating over sets internally in setobject.c, acquire strong references to the resulting items from the set. This prevents crashes in corner-cases of various set operations where the set gets mutated.

• bpo-45828 [https://bugs.python.org/issue?@action=redirect&bpo=45828]: The bytecode compiler now attempts to apply runtime stack manipulations at compile-time (whenever it is feasible to do so).

• bpo-30496 [https://bugs.python.org/issue?@action=redirect&bpo=30496]: Fixed a minor portability issue in the implementation of PyLong_FromLong(), and added a fast path for single-digit integers to PyLong_FromLongLong().

库

• bpo-25707 [https://bugs.python.org/issue?@action=redirect&bpo=25707]: Fixed a file leak in xml.etree.ElementTree.iterparse() when the iterator is not exhausted. Patch by Jacob Walls.

• bpo-46877 [https://bugs.python.org/issue?@action=redirect&bpo=46877]: Export unittest.doModuleCleanups() in unittest. Patch by Kumar Aditya.

• bpo-46848 [https://bugs.python.org/issue?@action=redirect&bpo=46848]: For performance, use the optimized string-searching implementations from find() and rfind() for find() and rfind().

• bpo-46736 [https://bugs.python.org/issue?@action=redirect&bpo=46736]: SimpleHTTPRequestHandler now uses HTML5 grammar. Patch by Donghee Na.

• bpo-44886 [https://bugs.python.org/issue?@action=redirect&bpo=44886]: Inherit asyncio proactor datagram transport from asyncio.DatagramTransport.

• bpo-46827 [https://bugs.python.org/issue?@action=redirect&bpo=46827]: Support UDP sockets in asyncio.loop.sock_connect() for selector-based event loops. Patch by Thomas Grainger.

• bpo-46811 [https://bugs.python.org/issue?@action=redirect&bpo=46811]: Make test suite support Expat >=2.4.5

• bpo-46252 [https://bugs.python.org/issue?@action=redirect&bpo=46252]: Raise TypeError if ssl.SSLSocket is passed to transport-based APIs.

• bpo-46784 [https://bugs.python.org/issue?@action=redirect&bpo=46784]: Fix libexpat symbols collisions with user dynamically loaded or statically linked libexpat in embedded Python.

• bpo-46786 [https://bugs.python.org/issue?@action=redirect&bpo=46786]: The HTML serialisation in xml.etree.ElementTree now writes embed, source, track and wbr as empty tags, as defined in HTML 5.

• bpo-39327 [https://bugs.python.org/issue?@action=redirect&bpo=39327]: shutil.rmtree() can now work with VirtualBox shared folders when running from the guest operating-system.

• bpo-45390 [https://bugs.python.org/issue?@action=redirect&bpo=45390]: Propagate asyncio.CancelledError message from inner task to outer awaiter.

• bpo-46756 [https://bugs.python.org/issue?@action=redirect&bpo=46756]: Fix a bug in urllib.request.HTTPPasswordMgr.find_user_password() and urllib.request.HTTPPasswordMgrWithPriorAuth.is_authenticated() which allowed to bypass authorization. For example, access to URI example.org/foobar was allowed if the user was authorized for URI example.org/foo.

• bpo-46737 [https://bugs.python.org/issue?@action=redirect&bpo=46737]: random.gauss() and random.normalvariate() now have default arguments.

• bpo-46752 [https://bugs.python.org/issue?@action=redirect&bpo=46752]: Add task groups to asyncio (structured concurrency, inspired by Trio's nurseries). This also introduces a change to task cancellation, where a cancelled task can't be cancelled again until it calls .uncancel().

• bpo-46724 [https://bugs.python.org/issue?@action=redirect&bpo=46724]: Fix dis behavior on negative jump offsets.

• bpo-46333 [https://bugs.python.org/issue?@action=redirect&bpo=46333]: The _repr_() method of typing.ForwardRef now includes the module parameter of typing.ForwardRef when it is set.

• bpo-46643 [https://bugs.python.org/issue?@action=redirect&bpo=46643]: In typing.get_type_hints(), support evaluating stringified ParamSpecArgs and ParamSpecKwargs annotations. Patch by Gregory Beauregard.

• bpo-45863 [https://bugs.python.org/issue?@action=redirect&bpo=45863]: When the tarfile module creates a pax format archive, it will put an integer representation of timestamps in the ustar header (if possible) for the benefit of older unarchivers, in addition to the existing full-precision timestamps in the pax extended header.

• bpo-46066 [https://bugs.python.org/issue?@action=redirect&bpo=46066]: Deprecate kwargs-based syntax for typing.TypedDict definitions. It had confusing semantics when specifying totality, and was largely unused. Patch by Jingchen Ye.

• bpo-46676 [https://bugs.python.org/issue?@action=redirect&bpo=46676]: Make typing.ParamSpec args and kwargs equal to themselves. Patch by Gregory Beauregard.

• bpo-46323 [https://bugs.python.org/issue?@action=redirect&bpo=46323]: ctypes.CFUNCTYPE() and ctypes.WINFUNCTYPE() now fail to create the type if its argtypes member contains too many arguments. Previously, the error was only raised when calling a function. Patch by Victor Stinner.

• bpo-46672 [https://bugs.python.org/issue?@action=redirect&bpo=46672]: Fix NameError in asyncio.gather() when initial type check fails.

• bpo-46659 [https://bugs.python.org/issue?@action=redirect&bpo=46659]: The calendar.LocaleTextCalendar and calendar.LocaleHTMLCalendar classes now use locale.getlocale(), instead of using locale.getdefaultlocale(), if no locale is specified. Patch by Victor Stinner.

• bpo-46659 [https://bugs.python.org/issue?@action=redirect&bpo=46659]: The locale.getdefaultlocale() function is deprecated and will be removed in Python 3.13. Use locale.setlocale(), locale.getpreferredencoding(False) and locale.getlocale() functions instead. Patch by Victor Stinner.

• bpo-46655 [https://bugs.python.org/issue?@action=redirect&bpo=46655]: In typing.get_type_hints(), support evaluating bare stringified TypeAlias annotations. Patch by Gregory Beauregard.

• bpo-45948 [https://bugs.python.org/issue?@action=redirect&bpo=45948]: Fixed a discrepancy in the C implementation of the xml.etree.ElementTree module. Now, instantiating an xml.etree.ElementTree.XMLParser with a target=None keyword provides a default xml.etree.ElementTree.TreeBuilder target as the Python implementation does.

• bpo-46626 [https://bugs.python.org/issue?@action=redirect&bpo=46626]: Expose Linux's IP_BIND_ADDRESS_NO_PORT option in socket.

• bpo-46521 [https://bugs.python.org/issue?@action=redirect&bpo=46521]: Fix a bug in the codeop module that was incorrectly identifying invalid code involving string quotes as valid code.

• bpo-46571 [https://bugs.python.org/issue?@action=redirect&bpo=46571]: Improve typing.no_type_check().

Now it does not modify external classes and functions. We also now correctly mark classmethods as not to be type checked.

• bpo-46400 [https://bugs.python.org/issue?@action=redirect&bpo=46400]: expat: Update libexpat from 2.4.1 to 2.4.4

• bpo-46556 [https://bugs.python.org/issue?@action=redirect&bpo=46556]: Deprecate undocumented support for using a pathlib.Path object as a context manager.

• bpo-46534 [https://bugs.python.org/issue?@action=redirect&bpo=46534]: Implement PEP 673 [https://peps.python.org/pep-0673/] typing.Self. Patch by James Hilton-Balfe.

• bpo-46522 [https://bugs.python.org/issue?@action=redirect&bpo=46522]: Make various module __getattr__ AttributeErrors more closely match a typical AttributeError

• bpo-46475 [https://bugs.python.org/issue?@action=redirect&bpo=46475]: Add typing.Never and typing.assert_never(). Patch by Jelle Zijlstra.

• bpo-46333 [https://bugs.python.org/issue?@action=redirect&bpo=46333]: The __eq__() and __hash__() methods of typing.ForwardRef now honor the module parameter of typing.ForwardRef. Forward references from different modules are now differentiated.

• bpo-46246 [https://bugs.python.org/issue?@action=redirect&bpo=46246]: Add missing __slots__ to importlib.metadata.DeprecatedList. Patch by Arie Bovenberg.

• bpo-46232 [https://bugs.python.org/issue?@action=redirect&bpo=46232]: The ssl module now handles certificates with bit strings in DN correctly.

• bpo-46195 [https://bugs.python.org/issue?@action=redirect&bpo=46195]: typing.get_type_hints() no longer adds Optional to parameters with None as a default. This aligns to changes to PEP 484 in https://github.com/python/peps/pull/689

• bpo-31369 [https://bugs.python.org/issue?@action=redirect&bpo=31369]: Add RegexFlag to re.__all__ and documented it. Add NOFLAG to indicate no flags being set.

• bpo-45898 [https://bugs.python.org/issue?@action=redirect&bpo=45898]: ctypes no longer defines ffi_type_* symbols in cfield.c. The symbols have been provided by libffi for over a decade.

• bpo-44953 [https://bugs.python.org/issue?@action=redirect&bpo=44953]: Calling operator.itemgetter objects and operator.attrgetter objects is now faster due to use of the vectorcall calling convention.

• bpo-44289 [https://bugs.python.org/issue?@action=redirect&bpo=44289]: Fix an issue with is_tarfile() method when using fileobj argument: position in the fileobj was advanced forward which made it unreadable with tarfile.TarFile.open().

• bpo-44011 [https://bugs.python.org/issue?@action=redirect&bpo=44011]: Reimplement SSL/TLS support in asyncio, borrow the implementation from uvloop library.

• bpo-41086 [https://bugs.python.org/issue?@action=redirect&bpo=41086]: Make the configparser.ConfigParser constructor raise TypeError if the interpolation parameter is not of type configparser.Interpolation

• bpo-29418 [https://bugs.python.org/issue?@action=redirect&bpo=29418]: Implement inspect.ismethodwrapper() and fix inspect.isroutine() for cases where methodwrapper is given. Patch by Hakan Çelik.

• bpo-14156 [https://bugs.python.org/issue?@action=redirect&bpo=14156]: argparse.FileType now supports an argument of '-' in binary mode, returning the .buffer attribute of sys.stdin/sys.stdout as appropriate. Modes including 'x' and 'a' are treated equivalently to 'w' when argument is '-'. Patch contributed by Josh Rosenberg

文档

• bpo-42238 [https://bugs.python.org/issue?@action=redirect&bpo=42238]: Doc/tools/rstlint.py has moved to its own repository and is now packaged on PyPI as sphinx-lint.

测试

• bpo-46913 [https://bugs.python.org/issue?@action=redirect&bpo=46913]: Fix test_faulthandler.test_sigfpe() if Python is built with undefined behavior sanitizer (UBSAN): disable UBSAN on the faulthandler_sigfpe() function. Patch by Victor Stinner.

• bpo-46760 [https://bugs.python.org/issue?@action=redirect&bpo=46760]: Remove bytecode offsets from expected values in test.test_dis module. Reduces the obstacles to modifying the VM or compiler.

• bpo-46708 [https://bugs.python.org/issue?@action=redirect&bpo=46708]: Prevent default asyncio event loop policy modification warning after test_asyncio execution.

• bpo-46678 [https://bugs.python.org/issue?@action=redirect&bpo=46678]: The function make_legacy_pyc in Lib/test/support/import_helper.py no longer fails when PYTHONPYCACHEPREFIX is set to a directory on a different device from where tempfiles are stored.

• bpo-46623 [https://bugs.python.org/issue?@action=redirect&bpo=46623]: Skip test_pair() and test_speech128() of test_zlib on s390x since they fail if zlib uses the s390x hardware accelerator. Patch by Victor Stinner.

构建

• bpo-46860 [https://bugs.python.org/issue?@action=redirect&bpo=46860]: Respect --with-suffix when building on case-insensitive file systems.

• bpo-46656 [https://bugs.python.org/issue?@action=redirect&bpo=46656]: Building Python now requires a C11 compiler. Optional C11 features are not required. Patch by Victor Stinner.

• bpo-46656 [https://bugs.python.org/issue?@action=redirect&bpo=46656]: Building Python now requires support for floating-point Not-a-Number (NaN): remove the Py_NO_NAN macro. Patch by Victor Stinner.

• bpo-46640 [https://bugs.python.org/issue?@action=redirect&bpo=46640]: Building Python now requires a C99 header file providing a NAN constant, or the __builtin_nan() builtin function. Patch by Victor Stinner.

• bpo-46608 [https://bugs.python.org/issue?@action=redirect&bpo=46608]: Exclude marshalled-frozen data if deepfreezing to save 300 KB disk space. This includes adding a new is_package field to _frozen. Patch by Kumar Aditya.

• bpo-40280 [https://bugs.python.org/issue?@action=redirect&bpo=40280]: Fix wasm32-emscripten test failures and platform issues. - Disable syscalls that are not supported or don't work, e.g. wait, getrusage, prlimit, mkfifo, mknod, setres[gu]id, setgroups. - Use fd_count to count open fds. - Add more checks for subprocess and fork. - Add workarounds for missing _multiprocessing and failing socket.accept(). - Enable bzip2. - Disable large file support. - Disable signal.alarm.

• bpo-46430 [https://bugs.python.org/issue?@action=redirect&bpo=46430]: Intern strings in deep-frozen modules. Patch by Kumar Aditya.

Windows

• bpo-46744 [https://bugs.python.org/issue?@action=redirect&bpo=46744]: The default all users install directory for ARM64 is now under the native Program Files folder, rather than Program Files (Arm) which is intended for ARM (32-bit) files.

• bpo-46567 [https://bugs.python.org/issue?@action=redirect&bpo=46567]: Adds Tcl and Tk support for Windows ARM64. This also adds IDLE to the installation.

• bpo-46638 [https://bugs.python.org/issue?@action=redirect&bpo=46638]: Ensures registry virtualization is consistently disabled. For 3.10 and earlier, it remains enabled (some registry writes are protected), while for 3.11 and later it is disabled (registry modifications affect all applications).

IDLE

• bpo-46630 [https://bugs.python.org/issue?@action=redirect&bpo=46630]: Make query dialogs on Windows start with a cursor in the entry box.

• bpo-45447 [https://bugs.python.org/issue?@action=redirect&bpo=45447]: Apply IDLE syntax highlighting to .pyi files. Patch by Alex Waygood and Terry Jan Reedy.

C API

• bpo-46748 [https://bugs.python.org/issue?@action=redirect&bpo=46748]: Python's public headers no longer import , leaving code that embeds/extends Python free to define bool, true and false.

• bpo-46836 [https://bugs.python.org/issue?@action=redirect&bpo=46836]: Move the PyFrameObject type definition (struct _frame) to the internal C API pycore_frame.h header file. Patch by Victor Stinner.

• bpo-45459 [https://bugs.python.org/issue?@action=redirect&bpo=45459]: Rename Include/buffer.h header file to Include/pybuffer.h to avoid conflicts with projects having an existing buffer.h header file. Patch by Victor Stinner.

• bpo-45412 [https://bugs.python.org/issue?@action=redirect&bpo=45412]: Remove the HAVE_PY_SET_53BIT_PRECISION macro (moved to the internal C API). Patch by Victor Stinner.

• bpo-46613 [https://bugs.python.org/issue?@action=redirect&bpo=46613]: Added function PyType_GetModuleByDef(), which allows access to module state when a method's defining class is not available.

Python 3.11.0 alpha 5

Release date: 2022-02-03

核心与内置函数

• bpo-45773 [https://bugs.python.org/issue?@action=redirect&bpo=45773]: Remove two invalid "peephole" optimizations from the bytecode compiler.

• bpo-46564 [https://bugs.python.org/issue?@action=redirect&bpo=46564]: Do not create frame objects when creating super object. Patch by Kumar Aditya.

• bpo-45885 [https://bugs.python.org/issue?@action=redirect&bpo=45885]: Added more fined-grained specialization failure stats regarding the COMPARE_OP bytecode.

• bpo-44977 [https://bugs.python.org/issue?@action=redirect&bpo=44977]: The delegation of int() to __trunc__() is now deprecated. Calling int(a) when type(a) implements __trunc__() but not __int__() or __index__() now raises a DeprecationWarning.

• bpo-46458 [https://bugs.python.org/issue?@action=redirect&bpo=46458]: Reorder code emitted by the compiler for a try-except block so that the else block's code immediately follows the try body (without a jump). This is more optimal for the happy path.

• bpo-46527 [https://bugs.python.org/issue?@action=redirect&bpo=46527]: Allow passing iterable as a keyword argument to enumerate() again. Patch by Jelle Zijlstra.

• bpo-46528 [https://bugs.python.org/issue?@action=redirect&bpo=46528]: Replace several stack manipulation instructions (DUP_TOP, DUP_TOP_TWO, ROT_TWO, ROT_THREE, ROT_FOUR, and ROT_N) with new COPY and SWAP instructions.

• bpo-46329 [https://bugs.python.org/issue?@action=redirect&bpo=46329]: Use two or three bytecodes to implement most calls.

Calls without named arguments are implemented as a sequence of two instructions: PRECALL; CALL. Calls with named arguments are implemented as a sequence of three instructions: PRECALL; KW_NAMES; CALL. There are two different PRECALL instructions: PRECALL_FUNTION and PRECALL_METHOD. The latter pairs with LOAD_METHOD.

This partition into pre-call and call allows better specialization, and thus better performance ultimately.

There is no change in semantics.

• bpo-46503 [https://bugs.python.org/issue?@action=redirect&bpo=46503]: Fix an assert when parsing some invalid N escape sequences in fstrings.

• bpo-46431 [https://bugs.python.org/issue?@action=redirect&bpo=46431]: Improve error message on invalid calls to BaseExceptionGroup._new_().

• bpo-46476 [https://bugs.python.org/issue?@action=redirect&bpo=46476]: Fix memory leak in code objects generated by deepfreeze. Patch by Kumar Aditya.

• bpo-46481 [https://bugs.python.org/issue?@action=redirect&bpo=46481]: Speed up calls to weakref.ref.__call__() by using the PEP 590 [https://peps.python.org/pep-0590/] vectorcall calling convention. Patch by Donghee Na.

• bpo-46417 [https://bugs.python.org/issue?@action=redirect&bpo=46417]: Fix a race condition on setting a type __bases__ attribute: the internal function add_subclass() now gets the PyTypeObject.tp_subclasses member after calling PyWeakref_NewRef() which can trigger a garbage collection which can indirectly modify PyTypeObject.tp_subclasses. Patch by Victor Stinner.

• bpo-46417 [https://bugs.python.org/issue?@action=redirect&bpo=46417]: python -X showrefcount now shows the total reference count after clearing and destroyed the main Python interpreter. Previously, it was shown before. Patch by Victor Stinner.

• bpo-43683 [https://bugs.python.org/issue?@action=redirect&bpo=43683]: Add ASYNC_GEN_WRAP opcode to wrap the value to be yielded in async generators. Removes the need to special case async generators in the YIELD_VALUE instruction.

• bpo-46407 [https://bugs.python.org/issue?@action=redirect&bpo=46407]: Optimize some modulo operations in Objects/longobject.c. Patch by Jeremiah Vivian.

• bpo-46409 [https://bugs.python.org/issue?@action=redirect&bpo=46409]: Add new RETURN_GENERATOR bytecode to make generators. Simplifies calling Python functions in the VM, as they no longer any need to special case generator functions.

Also add JUMP_NO_INTERRUPT bytecode that acts like JUMP_ABSOLUTE, but does not check for interrupts.

• bpo-46406 [https://bugs.python.org/issue?@action=redirect&bpo=46406]: The integer division // implementation has been optimized to better let the compiler understand its constraints. It can be 20% faster on the amd64 platform when dividing an int by a value smaller than 2**30.

• bpo-46383 [https://bugs.python.org/issue?@action=redirect&bpo=46383]: Fix invalid signature of _zoneinfo's module_free function to resolve a crash on wasm32-emscripten platform.

• bpo-46361 [https://bugs.python.org/issue?@action=redirect&bpo=46361]: Ensure that "small" integers created by int.from_bytes() and decimal.Decimal are properly cached.

• bpo-46161 [https://bugs.python.org/issue?@action=redirect&bpo=46161]: Fix the class building error when the arguments are constants and CALL_FUNCTION_EX is used.

• bpo-46028 [https://bugs.python.org/issue?@action=redirect&bpo=46028]: Fixes calculation of sys._base_executable when inside a virtual environment that uses symlinks with different binary names than the base environment provides.

• bpo-46091 [https://bugs.python.org/issue?@action=redirect&bpo=46091]: Correctly calculate indentation levels for lines with whitespace character that are ended by line continuation characters. Patch by Pablo Galindo

• bpo-30512 [https://bugs.python.org/issue?@action=redirect&bpo=30512]: Add CAN Socket support for NetBSD.

• bpo-46045 [https://bugs.python.org/issue?@action=redirect&bpo=46045]: Do not use POSIX semaphores on NetBSD

• bpo-44024 [https://bugs.python.org/issue?@action=redirect&bpo=44024]: Improve the TypeError message for non-string second arguments passed to the builtin functions getattr() and hasattr(). Patch by Géry Ogam.

库

• bpo-46624 [https://bugs.python.org/issue?@action=redirect&bpo=46624]: Restore support for non-integer arguments of random.randrange() and random.randint().

• bpo-46591 [https://bugs.python.org/issue?@action=redirect&bpo=46591]: Make the IDLE doc URL on the About IDLE dialog clickable.

• bpo-46565 [https://bugs.python.org/issue?@action=redirect&bpo=46565]: Remove loop variables that are leaking into modules' namespaces.

• bpo-46553 [https://bugs.python.org/issue?@action=redirect&bpo=46553]: In typing.get_type_hints(), support evaluating bare stringified ClassVar annotations. Patch by Gregory Beauregard.

• bpo-46544 [https://bugs.python.org/issue?@action=redirect&bpo=46544]: Don't leak x & uspace intermediate vars in textwrap.TextWrapper.

• bpo-46487 [https://bugs.python.org/issue?@action=redirect&bpo=46487]: Add the getwritebuffer_limits method to asyncio.transports.WriteTransport and to the SSL transport.

• bpo-45173 [https://bugs.python.org/issue?@action=redirect&bpo=45173]: Note the configparser deprecations will be removed in Python 3.12.

• bpo-45162 [https://bugs.python.org/issue?@action=redirect&bpo=45162]: The deprecated unittest APIs removed in 3.11a1 have been temporarily restored to be removed in 3.12 while cleanups in external projects go in.

• bpo-46539 [https://bugs.python.org/issue?@action=redirect&bpo=46539]: In typing.get_type_hints(), support evaluating stringified ClassVar and Final annotations inside Annotated. Patch by Gregory Beauregard.

• bpo-46510 [https://bugs.python.org/issue?@action=redirect&bpo=46510]: Add missing test for types.TracebackType and types.FrameType. Calculate them directly from the caught exception without calling sys.exc_info().

• bpo-46491 [https://bugs.python.org/issue?@action=redirect&bpo=46491]: Allow typing.Annotated to wrap typing.Final and typing.ClassVar. Patch by Gregory Beauregard.

• bpo-46483 [https://bugs.python.org/issue?@action=redirect&bpo=46483]: Remove __class_getitem__() from pathlib.PurePath as this class was not supposed to be generic.

• bpo-46436 [https://bugs.python.org/issue?@action=redirect&bpo=46436]: Fix commandline option -d/--directory in module http.server which is ignored when combined with commandline option --cgi. Patch by Géry Ogam.

• bpo-41403 [https://bugs.python.org/issue?@action=redirect&bpo=41403]: Make mock.patch() raise a TypeError with a relevant error message on invalid arg. Previously it allowed a cryptic AttributeError to escape.

• bpo-46474 [https://bugs.python.org/issue?@action=redirect&bpo=46474]: In importlib.metadata.EntryPoint.pattern, avoid potential REDoS by limiting ambiguity in consecutive whitespace.

• bpo-46474 [https://bugs.python.org/issue?@action=redirect&bpo=46474]: Removed private method from importlib.metadata.Path. Sync with importlib_metadata 4.10.0.

• bpo-46470 [https://bugs.python.org/issue?@action=redirect&bpo=46470]: Remove unused branch from typing._remove_dups_flatten

• bpo-46469 [https://bugs.python.org/issue?@action=redirect&bpo=46469]: asyncio generic classes now return types.GenericAlias in __class_getitem__ instead of the same class.

• bpo-41906 [https://bugs.python.org/issue?@action=redirect&bpo=41906]: Support passing filter instances in the filters values of handlers and loggers in the dictionary passed to logging.config.dictConfig().

• bpo-46422 [https://bugs.python.org/issue?@action=redirect&bpo=46422]: Use dis.Positions in dis.Instruction instead of a regular tuple.

• bpo-46434 [https://bugs.python.org/issue?@action=redirect&bpo=46434]: pdb now gracefully handles help when __doc__ is missing, for example when run with pregenerated optimized .pyc files.

• bpo-43869 [https://bugs.python.org/issue?@action=redirect&bpo=43869]: Python uses the same time Epoch on all platforms. Add an explicit unit test to ensure that it's the case. Patch by Victor Stinner.

• bpo-46414 [https://bugs.python.org/issue?@action=redirect&bpo=46414]: Add typing.reveal_type(). Patch by Jelle Zijlstra.

• bpo-40280 [https://bugs.python.org/issue?@action=redirect&bpo=40280]: subprocess now imports Windows-specific imports when msvcrt module is available, and POSIX-specific imports on all other platforms. This gives a clean exception when _posixsubprocess is not available (e.g. Emscripten browser target).

• bpo-40066 [https://bugs.python.org/issue?@action=redirect&bpo=40066]: IntEnum, IntFlag, and StrEnum use the mixed-in type for their str() and format() output.

• bpo-46316 [https://bugs.python.org/issue?@action=redirect&bpo=46316]: Optimize pathlib.Path.iterdir() by removing an unnecessary check for special entries.

• bpo-29688 [https://bugs.python.org/issue?@action=redirect&bpo=29688]: Document pathlib.Path.absolute() (which has always existed).

• bpo-43012 [https://bugs.python.org/issue?@action=redirect&bpo=43012]: The pathlib module's obsolete and internal _Accessor class has been removed to prepare the terrain for upcoming enhancements to the module.

• bpo-46258 [https://bugs.python.org/issue?@action=redirect&bpo=46258]: Speed up math.isqrt() for small positive integers by replacing two division steps with a lookup table.

• bpo-46242 [https://bugs.python.org/issue?@action=redirect&bpo=46242]: Improve error message when creating a new enum.Enum type subclassing an existing Enum with membernames_ using enum.Enum.__call__().

• bpo-43118 [https://bugs.python.org/issue?@action=redirect&bpo=43118]: Fix a bug in inspect.signature() that was causing it to fail on some subclasses of classes with a __textsignature_ referencing module globals. Patch by Weipeng Hong.

• bpo-26552 [https://bugs.python.org/issue?@action=redirect&bpo=26552]: Fixed case where failing asyncio.ensure_future() did not close the coroutine. Patch by Kumar Aditya.

• bpo-21987 [https://bugs.python.org/issue?@action=redirect&bpo=21987]: Fix an issue with tarfile.TarFile.getmember() getting a directory name with a trailing slash.

• bpo-46124 [https://bugs.python.org/issue?@action=redirect&bpo=46124]: Update zoneinfo to rely on importlib.resources traversable API.

• bpo-46103 [https://bugs.python.org/issue?@action=redirect&bpo=46103]: Now inspect.getmembers() only gets __bases__ attribute from class type. Patch by Weipeng Hong.

• bpo-46080 [https://bugs.python.org/issue?@action=redirect&bpo=46080]: Fix exception in argparse help text generation if a argparse.BooleanOptionalAction argument's default is argparse.SUPPRESS and it has help specified. Patch by Felix Fontein.

• bpo-44791 [https://bugs.python.org/issue?@action=redirect&bpo=44791]: Fix substitution of ParamSpec in Concatenate with different parameter expressions. Substitution with a list of types returns now a tuple of types. Substitution with Concatenate returns now a Concatenate with concatenated lists of arguments.

文档

• bpo-46463 [https://bugs.python.org/issue?@action=redirect&bpo=46463]: Fixes escape4chm.py script used when building the CHM documentation file

测试

• bpo-43478 [https://bugs.python.org/issue?@action=redirect&bpo=43478]: Mocks can no longer be provided as the specs for other Mocks. As a result, an already-mocked object cannot be passed to mock.Mock(). This can uncover bugs in tests since these Mock-derived Mocks will always pass certain tests (e.g. isinstance) and builtin assert functions (e.g. assert_called_once_with) will unconditionally pass.

• bpo-46616 [https://bugs.python.org/issue?@action=redirect&bpo=46616]: Ensures test_importlib.test_windows cleans up registry keys after completion.

• bpo-44359 [https://bugs.python.org/issue?@action=redirect&bpo=44359]: test_ftplib now silently ignores socket errors to prevent logging unhandled threading exceptions. Patch by Victor Stinner.

• bpo-46600 [https://bugs.python.org/issue?@action=redirect&bpo=46600]: Fix test_gdb.test_pycfunction() for Python built with clang -Og. Tolerate inlined functions in the gdb traceback. Patch by Victor Stinner.

• bpo-46542 [https://bugs.python.org/issue?@action=redirect&bpo=46542]: Fix a Python crash in test_lib2to3 when using Python built in debug mode: limit the recursion limit. Patch by Victor Stinner.

• bpo-46576 [https://bugs.python.org/issue?@action=redirect&bpo=46576]: test_peg_generator now disables compiler optimization when testing compilation of its own C extensions to significantly speed up the testing on non-debug builds of CPython.

• bpo-46542 [https://bugs.python.org/issue?@action=redirect&bpo=46542]: Fix test_json tests checking for RecursionError: modify these tests to use support.infinite_recursion(). Patch by Victor Stinner.

• bpo-13886 [https://bugs.python.org/issue?@action=redirect&bpo=13886]: Skip test_builtin PTY tests on nonASCII characters if the readline module is loaded. The readline module changes input() behavior, but test_builtin is not intended to test the readline module. Patch by Victor Stinner.

• bpo-40280 [https://bugs.python.org/issue?@action=redirect&bpo=40280]: Add test.support.requires_fork() decorators to mark tests that require a working os.fork().

• bpo-40280 [https://bugs.python.org/issue?@action=redirect&bpo=40280]: Add test.support.requires_subprocess() decorator to mark tests which require working subprocess module or os.spawn*. The wasm32-emscripten platform has no support for processes.

• bpo-46126 [https://bugs.python.org/issue?@action=redirect&bpo=46126]: Disable 'descriptions' when running tests internally.

构建

• bpo-46602 [https://bugs.python.org/issue?@action=redirect&bpo=46602]: Tidied up configure.ac so that conftest.c is truncated rather than appended. This assists in the case where the 'rm' of conftest.c fails to happen between tests. Downstream issues such as a clobbered SOABI can result.

• bpo-46600 [https://bugs.python.org/issue?@action=redirect&bpo=46600]: Fix the test checking if the C compiler supports -Og option in the ./configure script to also use -Og on clang which supports it. Patch by Victor Stinner.

• bpo-38472 [https://bugs.python.org/issue?@action=redirect&bpo=38472]: Fix GCC detection in setup.py when cross-compiling. The C compiler is now run with LC_ALL=C. Previously, the detection failed with a German locale.

• bpo-46513 [https://bugs.python.org/issue?@action=redirect&bpo=46513]: configure no longer uses AC_C_CHAR_UNSIGNED macro and pyconfig.h no longer defines reserved symbol __CHAR_UNSIGNED__.

• bpo-46471 [https://bugs.python.org/issue?@action=redirect&bpo=46471]: Use global singletons for single byte bytes objects in deepfreeze.

• bpo-46443 [https://bugs.python.org/issue?@action=redirect&bpo=46443]: Deepfreeze now uses cached small integers as it saves some space for common small integers.

• bpo-46429 [https://bugs.python.org/issue?@action=redirect&bpo=46429]: Merge all deep-frozen files into one for space savings. Patch by Kumar Aditya.

• bpo-45569 [https://bugs.python.org/issue?@action=redirect&bpo=45569]: The build now defaults to using 30-bit digits for Python integers. Previously either 15-bit or 30-bit digits would be selected, depending on the platform. 15-bit digits may still be selected using the --enable-big-digits=15 option to the configure script, or by defining PYLONG_BITS_IN_DIGIT in pyconfig.h.

• bpo-45925 [https://bugs.python.org/issue?@action=redirect&bpo=45925]: Update Windows installer to use SQLite 3.37.2.

• bpo-43112 [https://bugs.python.org/issue?@action=redirect&bpo=43112]: Detect musl libc as a separate SOABI (tagged as linux-musl).

Windows

• bpo-33125 [https://bugs.python.org/issue?@action=redirect&bpo=33125]: The traditional EXE/MSI based installer for Windows is now available for ARM64

• bpo-46362 [https://bugs.python.org/issue?@action=redirect&bpo=46362]: os.path.abspath("C:CON") is now fixed to return ".CON", not the same path. The regression was true of all legacy DOS devices such as COM1, LPT1, or NUL.

• bpo-44934 [https://bugs.python.org/issue?@action=redirect&bpo=44934]: The installer now offers a commandline only option to add the installation directory to the end of PATH instead of at the start.

macOS

• bpo-45925 [https://bugs.python.org/issue?@action=redirect&bpo=45925]: Update macOS installer to SQLite 3.37.2.

IDLE

• bpo-45296 [https://bugs.python.org/issue?@action=redirect&bpo=45296]: Clarify close, quit, and exit in IDLE. In the File menu, 'Close' and 'Exit' are now 'Close Window' (the current one) and 'Exit' is now 'Exit IDLE' (by closing all windows). In Shell, 'quit()' and 'exit()' mean 'close Shell'. If there are no other windows, this also exits IDLE.

C API

• bpo-40170 [https://bugs.python.org/issue?@action=redirect&bpo=40170]: Remove the PyHeapType_GET_MEMBERS() macro. It was exposed in the public C API by mistake, it must only be used by Python internally. Use the PyTypeObject.tp_members member instead. Patch by Victor Stinner.

• bpo-40170 [https://bugs.python.org/issue?@action=redirect&bpo=40170]: Move PyGetAllocatedBlocks() and PyObjectDebugMallocStats() private functions to the internal C API. Patch by Victor Stinner.

• bpo-46433 [https://bugs.python.org/issue?@action=redirect&bpo=46433]: The internal function PyTypeGetModuleByDef now correctly handles inheritance patterns involving static types.

• bpo-45459 [https://bugs.python.org/issue?@action=redirect&bpo=45459]: Py_buffer and various Py_buffer related functions are now part of the limited API and stable ABI.

• bpo-14916 [https://bugs.python.org/issue?@action=redirect&bpo=14916]: Fixed bug in the tokenizer that prevented PyRun_InteractiveOne from parsing from the provided FD.

Python 3.11.0 alpha 4

Release date: 2022-01-13

核心与内置函数

• bpo-46070 [https://bugs.python.org/issue?@action=redirect&bpo=46070]: Py_EndInterpreter() now explicitly untracks all objects currently tracked by the GC. Previously, if an object was used later by another interpreter, calling PyObject_GC_UnTrack() on the object crashed if the previous or the next object of the PyGC_Head structure became a dangling pointer. Patch by Victor Stinner.

• bpo-46347 [https://bugs.python.org/issue?@action=redirect&bpo=46347]: Fix memory leak in PyEval_EvalCodeEx.

• bpo-46339 [https://bugs.python.org/issue?@action=redirect&bpo=46339]: Fix a crash in the parser when retrieving the error text for multiline fstrings expressions that do not start in the first line of the string. Patch by Pablo Galindo

• bpo-46331 [https://bugs.python.org/issue?@action=redirect&bpo=46331]: Do not set line number of instruction storing docstring. Fixes regression introduced in 3.11 alpha.

• bpo-46314 [https://bugs.python.org/issue?@action=redirect&bpo=46314]: Remove spurious "call" event when creating a lambda function that was accidentally introduced in 3.11a4.

• bpo-46289 [https://bugs.python.org/issue?@action=redirect&bpo=46289]: ASDL declaration of FormattedValue has changed to reflect conversion field is not optional.

• bpo-46297 [https://bugs.python.org/issue?@action=redirect&bpo=46297]: Fixed an interpreter crash on bootup with multiple PythonPaths set in the Windows registry. Patch by Derzsi Dániel.

• bpo-46237 [https://bugs.python.org/issue?@action=redirect&bpo=46237]: Fix the line number of tokenizer errors inside fstrings. Patch by Pablo Galindo.

• bpo-46263 [https://bugs.python.org/issue?@action=redirect&bpo=46263]: We always expect the "usefrozenmodules" config to be set, now that getpath.c was rewritten in pure Python and the logic improved.

• bpo-46006 [https://bugs.python.org/issue?@action=redirect&bpo=46006]: Fix a regression when a type method like __init__() is modified in a subinterpreter. Fix a regression in PyUnicodeEqualToASCIIId() and type update_slot(). Revert the change which made the Unicode dictionary of interned strings compatible with subinterpreters: the internal interned dictionary is shared again by all interpreters. Patch by Victor Stinner.

• bpo-45923 [https://bugs.python.org/issue?@action=redirect&bpo=45923]: Add RESUME opcode. This is a logical no-op. It is emitted by the compiler anywhere a Python function can be entered. It is used by the interpreter to perform tracing and optimizer checks.

• bpo-46208 [https://bugs.python.org/issue?@action=redirect&bpo=46208]: Fix the regression of os.path.normpath("A/../../B") not returning expected "../B" but "B".

• bpo-46240 [https://bugs.python.org/issue?@action=redirect&bpo=46240]: Correct the error message for unclosed parentheses when the tokenizer doesn't reach the end of the source when the error is reported. Patch by Pablo Galindo

• bpo-46009 [https://bugs.python.org/issue?@action=redirect&bpo=46009]: Remove the GEN_START opcode.

• bpo-46235 [https://bugs.python.org/issue?@action=redirect&bpo=46235]: Certain sequence multiplication operations like [0] * 1_000 are now faster due to reference-counting optimizations. Patch by Dennis Sweeney.

• bpo-46221 [https://bugs.python.org/issue?@action=redirect&bpo=46221]: PREP_RERAISE_STAR no longer pushes lasti to the stack.

• bpo-46202 [https://bugs.python.org/issue?@action=redirect&bpo=46202]: Remove POP_EXCEPT_AND_RERAISE and replace it by an equivalent sequence of other opcodes.

• bpo-46085 [https://bugs.python.org/issue?@action=redirect&bpo=46085]: Fix iterator cache mechanism of OrderedDict.

• bpo-46055 [https://bugs.python.org/issue?@action=redirect&bpo=46055]: Speed up shifting operation involving integers less than PyLong_BASE. Patch by Xinhang Xu.

• bpo-46110 [https://bugs.python.org/issue?@action=redirect&bpo=46110]: Add a maximum recursion check to the PEG parser to avoid stack overflow. Patch by Pablo Galindo

• bpo-46107 [https://bugs.python.org/issue?@action=redirect&bpo=46107]: Fix bug where ExceptionGroup.split() and ExceptionGroup.subgroup() did not copy the exception group's __note__ field to the parts.

• bpo-45711 [https://bugs.python.org/issue?@action=redirect&bpo=45711]: The interpreter state's representation of handled exceptions (a.k.a exc_info, or PyErrStackItem) now has only the exc_value field, exc_type and exc_traceback have been removed as their values can be derived from exc_value.

• bpo-44525 [https://bugs.python.org/issue?@action=redirect&bpo=44525]: Replace the four call bytecode instructions which one pre-call instruction and two call instructions.

Removes CALL_FUNCTION, CALL_FUNCTION_KW, CALL_METHOD and CALL_METHOD_KW.

Adds CALL_NO_KW and CALL_KW call instructions, and PRECALL_METHOD prefix for pairing with LOAD_METHOD.

• bpo-46039 [https://bugs.python.org/issue?@action=redirect&bpo=46039]: Remove the YIELD_FROM instruction and replace it with the SEND instruction which performs the same operation, but without the loop.

• bpo-45635 [https://bugs.python.org/issue?@action=redirect&bpo=45635]: The code called from PyErrDisplay() was refactored to improve error handling. It now exits immediately upon an unrecoverable error.

• bpo-46054 [https://bugs.python.org/issue?@action=redirect&bpo=46054]: Fix parser error when parsing non-utf8 characters in source files. Patch by Pablo Galindo.

• bpo-46042 [https://bugs.python.org/issue?@action=redirect&bpo=46042]: Improve the location of the caret in SyntaxError exceptions emitted by the symbol table. Patch by Pablo Galindo.

• bpo-46049 [https://bugs.python.org/issue?@action=redirect&bpo=46049]: Ensure ._pth files work as intended on platforms other than Windows.

• bpo-46048 [https://bugs.python.org/issue?@action=redirect&bpo=46048]: Fixes parsing of ._pth files on startup so that single-character paths are correctly read.

• bpo-37971 [https://bugs.python.org/issue?@action=redirect&bpo=37971]: Fix a bug where the line numbers given in a traceback when a decorator application raised an exception were wrong.

• bpo-46031 [https://bugs.python.org/issue?@action=redirect&bpo=46031]: Add POP_JUMP_IF_NOT_NONE and POP_JUMP_IF_NONE opcodes to speed up conditional jumps.

• bpo-45654 [https://bugs.python.org/issue?@action=redirect&bpo=45654]: Deepfreeze runpy, patch by Kumar Aditya.

• bpo-46025 [https://bugs.python.org/issue?@action=redirect&bpo=46025]: Fix a crash in the atexit module involving functions that unregister themselves before raising exceptions. Patch by Pablo Galindo.

• bpo-46000 [https://bugs.python.org/issue?@action=redirect&bpo=46000]: Improve compatibility of the curses module with NetBSD curses.

• bpo-44525 [https://bugs.python.org/issue?@action=redirect&bpo=44525]: Specialize the CALL_FUNCTION instruction for calls to builtin types with a single argument. Speeds up range(x), list(x), and specifically type(obj).

• bpo-42918 [https://bugs.python.org/issue?@action=redirect&bpo=42918]: Fix bug where the builtin compile() function did not always raise a SyntaxError when passed multiple statements in 'single' mode. Patch by Weipeng Hong.

• bpo-45953 [https://bugs.python.org/issue?@action=redirect&bpo=45953]: The main interpreter in PyRuntimeState.interpreters is now statically allocated (as part of PyRuntime). Likewise for the initial thread state of each interpreter. This means less allocation during runtime init, as well as better memory locality for these key state objects.

• bpo-45292 [https://bugs.python.org/issue?@action=redirect&bpo=45292]: Complete the PEP 654 [https://peps.python.org/pep-0654/] implementation: add except*.

• bpo-43413 [https://bugs.python.org/issue?@action=redirect&bpo=43413]: Revert changes in set.__init__. Subclass of set needs to define a __init__() method if it defines a _new_() method with additional keyword parameters.

• bpo-43931 [https://bugs.python.org/issue?@action=redirect&bpo=43931]: Added the Py_Version constant which bears the same value as PY_VERSION_HEX. Patch by Gabriele N. Tornetta.

库

• bpo-46342 [https://bugs.python.org/issue?@action=redirect&bpo=46342]: The @typing.final decorator now sets the __final__ attribute on the decorated object to allow runtime introspection. Patch by Jelle Zijlstra.

• bpo-46328 [https://bugs.python.org/issue?@action=redirect&bpo=46328]: Added the sys.exception() method which returns the active exception instance.

• bpo-46307 [https://bugs.python.org/issue?@action=redirect&bpo=46307]: Add string.Template.is_valid() and string.Template.get_identifiers() methods.

• bpo-46306 [https://bugs.python.org/issue?@action=redirect&bpo=46306]: Assume that types.CodeType always has types.CodeType.co_firstlineno in doctest.

• bpo-40479 [https://bugs.python.org/issue?@action=redirect&bpo=40479]: Fix hashlib usedforsecurity option to work correctly with OpenSSL 3.0.0 in FIPS mode.

• bpo-46070 [https://bugs.python.org/issue?@action=redirect&bpo=46070]: Fix possible segfault when importing the asyncio module from different subinterpreters in parallel. Patch by Erlend E. Aasland.

• bpo-46244 [https://bugs.python.org/issue?@action=redirect&bpo=46244]: Removed __slots__ from typing.ParamSpec and typing.TypeVar. They served no purpose. Patch by Arie Bovenberg.

• bpo-46278 [https://bugs.python.org/issue?@action=redirect&bpo=46278]: Reflect context argument in AbstractEventLoop.call_*() methods. Loop implementations already support it.

• bpo-46269 [https://bugs.python.org/issue?@action=redirect&bpo=46269]: Remove special-casing of _new_ in enum.Enum.__dir__().

• bpo-46266 [https://bugs.python.org/issue?@action=redirect&bpo=46266]: Improve day constants in calendar.

Now all constants (MONDAY … SUNDAY) are documented, tested, and added to __all__.

• bpo-46257 [https://bugs.python.org/issue?@action=redirect&bpo=46257]: Optimized the mean, variance, and stdev functions in the statistics module. If the input is an iterator, it is consumed in a single pass rather than eating memory by conversion to a list. The single pass algorithm is about twice as fast as the previous two pass code.

• bpo-41011 [https://bugs.python.org/issue?@action=redirect&bpo=41011]: Added two new variables to pyvenv.cfg which is generated by venv module: executable for the executable and command for the command line used to create the environment.

• bpo-46239 [https://bugs.python.org/issue?@action=redirect&bpo=46239]: Improve error message when importing asyncio.windows_events on non-Windows.

• bpo-46238 [https://bugs.python.org/issue?@action=redirect&bpo=46238]: Reuse _winapi constants in asyncio.windows_events.

• bpo-46222 [https://bugs.python.org/issue?@action=redirect&bpo=46222]: Adding SF_NOCACHE sendfile constant for FreeBSD for the posixmodule.

• bpo-37295 [https://bugs.python.org/issue?@action=redirect&bpo=37295]: Add fast path for 0 <= k <= n <= 67 for math.comb().

• bpo-46176 [https://bugs.python.org/issue?@action=redirect&bpo=46176]: Adding the MAP_STACK constant for the mmap module.

• bpo-43424 [https://bugs.python.org/issue?@action=redirect&bpo=43424]: Deprecate webbrowser.MacOSXOSAScript._name and use name instead.

• bpo-45321 [https://bugs.python.org/issue?@action=redirect&bpo=45321]: Added missing error codes to module xml.parsers.expat.errors.

• bpo-46125 [https://bugs.python.org/issue?@action=redirect&bpo=46125]: Refactor tests to test traversable API directly. Includes changes from importlib 5.4.0.

• bpo-46118 [https://bugs.python.org/issue?@action=redirect&bpo=46118]: Moved importlib.resources and its related functionality to a package.

• bpo-37578 [https://bugs.python.org/issue?@action=redirect&bpo=37578]: Add include_hidden parameter to glob() and iglob() to match hidden files and directories when using special characters like *, **, ? and [].

• bpo-20369 [https://bugs.python.org/issue?@action=redirect&bpo=20369]: concurrent.futures.wait() no longer blocks forever when given duplicate Futures. Patch by Kumar Aditya.

• bpo-46105 [https://bugs.python.org/issue?@action=redirect&bpo=46105]: Honor spec when generating requirement specs with urls and extras (importlib_metadata 4.8.3).

• bpo-44893 [https://bugs.python.org/issue?@action=redirect&bpo=44893]: EntryPoint objects are no longer tuples. Recommended means to access is by attribute ('.name', '.group') or accessor ('.load()'). Access by index is deprecated and will raise deprecation warning.

• bpo-22815 [https://bugs.python.org/issue?@action=redirect&bpo=22815]: Print unexpected successes together with failures and errors in summary in unittest.TextTestResult.

• bpo-22047 [https://bugs.python.org/issue?@action=redirect&bpo=22047]: Calling add_argument_group() on an argument group is deprecated. Calling add_argument_group() or add_mutually_exclusive_group() on a mutually exclusive group is deprecated.

These features were never supported and do not always work correctly. The functions exist on the API by accident through inheritance and will be removed in the future.

• bpo-26952 [https://bugs.python.org/issue?@action=redirect&bpo=26952]: argparse raises ValueError with clear message when trying to render usage for an empty mutually exclusive group. Previously it raised a cryptic IndexError.

• bpo-45615 [https://bugs.python.org/issue?@action=redirect&bpo=45615]: Functions in the traceback module raise TypeError rather than AttributeError when an exception argument is not of type BaseException.

• bpo-16594 [https://bugs.python.org/issue?@action=redirect&bpo=16594]: Add allow allow_reuse_port flag in socketserver.

• bpo-27718 [https://bugs.python.org/issue?@action=redirect&bpo=27718]: Fix help for the signal module. Some functions (e.g. signal() and getsignal()) were omitted.

• bpo-46032 [https://bugs.python.org/issue?@action=redirect&bpo=46032]: The registry() method of functools.singledispatch() functions checks now the first argument or the first parameter annotation and raises a TypeError if it is not supported. Previously unsupported "types" were ignored (e.g. typing.List[int]) or caused an error at calling time (e.g. list[int]).

• bpo-46014 [https://bugs.python.org/issue?@action=redirect&bpo=46014]: Add ability to use typing.Union and types.UnionType as dispatch argument to functools.singledispatch. Patch provided by Yurii Karabas.

• bpo-27062 [https://bugs.python.org/issue?@action=redirect&bpo=27062]: Add __all__ to inspect, patch by Kumar Aditya.

• bpo-46018 [https://bugs.python.org/issue?@action=redirect&bpo=46018]: Ensure that math.expm1() does not raise on underflow.

• bpo-46016 [https://bugs.python.org/issue?@action=redirect&bpo=46016]: Adding F_DUP2FD and F_DUP2FD_CLOEXEC constants from FreeBSD into the fcntl module.

• bpo-45755 [https://bugs.python.org/issue?@action=redirect&bpo=45755]: typing generic aliases now reveal the class attributes of the original generic class when passed to dir(). This was the behavior up to Python 3.6, but was changed in 3.7-3.9.

• bpo-45874 [https://bugs.python.org/issue?@action=redirect&bpo=45874]: The empty query string, consisting of no query arguments, is now handled correctly in urllib.parse.parse_qsl. This caused problems before when strict parsing was enabled.

• bpo-44674 [https://bugs.python.org/issue?@action=redirect&bpo=44674]: Change how dataclasses disallows mutable default values. It used to use a list of known types (list, dict, set). Now it disallows unhashable objects to be defaults. It's using unhashability as a proxy for mutability. Patch by Eric V. Smith, idea by Raymond Hettinger.

• bpo-23882 [https://bugs.python.org/issue?@action=redirect&bpo=23882]: Remove namespace package (PEP 420) support from unittest discovery. It was introduced in Python 3.4 but has been broken since Python 3.7.

• bpo-25066 [https://bugs.python.org/issue?@action=redirect&bpo=25066]: Added a _repr_() method to multiprocessing.Event objects, patch by Kumar Aditya.

• bpo-45643 [https://bugs.python.org/issue?@action=redirect&bpo=45643]: Added signal.SIGSTKFLT on platforms where this signal is defined.

• bpo-44092 [https://bugs.python.org/issue?@action=redirect&bpo=44092]: Fetch across rollback no longer raises InterfaceError. Instead we leave it to the SQLite library to handle these cases. Patch by Erlend E. Aasland.

• bpo-42413 [https://bugs.python.org/issue?@action=redirect&bpo=42413]: Replace concurrent.futures.TimeoutError and asyncio.TimeoutError with builtin TimeoutError, keep these names as deprecated aliases.

文档

• bpo-46196 [https://bugs.python.org/issue?@action=redirect&bpo=46196]: Document method cmd.Cmd.columnize().

• bpo-46120 [https://bugs.python.org/issue?@action=redirect&bpo=46120]: State that | is preferred for readability over Union in the typing docs.

• bpo-46109 [https://bugs.python.org/issue?@action=redirect&bpo=46109]: Extracted importlib.resources and importlib.resources.abc documentation into separate files.

• bpo-19737 [https://bugs.python.org/issue?@action=redirect&bpo=19737]: Update the documentation for the globals() function.

测试

• bpo-46296 [https://bugs.python.org/issue?@action=redirect&bpo=46296]: Add a test case for enum with useargs_ == True and membertype_ == object.

• bpo-46205 [https://bugs.python.org/issue?@action=redirect&bpo=46205]: Fix hang in runtest_mp due to race condition

• bpo-46263 [https://bugs.python.org/issue?@action=redirect&bpo=46263]: Fix test_capi on FreeBSD 14-dev: instruct jemalloc to not fill freed memory with junk byte.

• bpo-46262 [https://bugs.python.org/issue?@action=redirect&bpo=46262]: Cover ValueError path in tests for enum.Flag.missing().

• bpo-46150 [https://bugs.python.org/issue?@action=redirect&bpo=46150]: Now fakename in test_pathlib.PosixPathTest.test_expanduser is checked to be nonexistent.

• bpo-46129 [https://bugs.python.org/issue?@action=redirect&bpo=46129]: Rewrite asyncio.locks tests with unittest.IsolatedAsyncioTestCase usage.

• bpo-23819 [https://bugs.python.org/issue?@action=redirect&bpo=23819]: Fixed asyncio tests in python optimized mode. Patch by Kumar Aditya.

• bpo-46114 [https://bugs.python.org/issue?@action=redirect&bpo=46114]: Fix test case for OpenSSL 3.0.1 version. OpenSSL 3.0 uses 0xMNN00PP0L.