文档

• gh-85525 [https://github.com/python/cpython/issues/85525]: Remove extra row

• gh-86404 [https://github.com/python/cpython/issues/86404]: Deprecated tools make suspicious and rstlint.py are now removed. They have been replaced by sphinx-lint [https://pypi.org/project/sphinx-lint/].

• gh-97741 [https://github.com/python/cpython/issues/97741]: Fix ! in c domain ref target syntax via a conf.py patch, so it works as intended to disable ref target resolution.

• gh-96432 [https://github.com/python/cpython/issues/96432]: Fraction literals now support whitespace around the forward slash, Fraction('2 / 3').

• gh-96098 [https://github.com/python/cpython/issues/96098]: Improve discoverability of the higher level concurrent.futures module by providing clearer links from the lower level threading and multiprocessing modules.

• gh-95957 [https://github.com/python/cpython/issues/95957]: What's New 3.11 now has instructions for how to provide compiler and linker flags for Tcl/Tk and OpenSSL on RHEL 7 and CentOS 7.

• gh-95588 [https://github.com/python/cpython/issues/95588]: Clarified the conflicting advice given in the ast documentation about ast.literal_eval() being "safe" for use on untrusted input while at the same time warning that it can crash the process. The latter statement is true and is deemed unfixable without a large amount of work unsuitable for a bugfix. So we keep the warning and no longer claim that literal_eval is safe.

• gh-91207 [https://github.com/python/cpython/issues/91207]: Fix stylesheet not working in Windows CHM htmlhelp docs and add warning that they are deprecated. Contributed by C.A.M. Gerlach.

• gh-95454 [https://github.com/python/cpython/issues/95454]: Replaced incorrectly written true/false values in documentation. Patch by Robert O'Shea

• gh-95451 [https://github.com/python/cpython/issues/95451]: Update library documentation with availability information on WebAssembly platforms wasm32-emscripten and wasm32-wasi.

• gh-95415 [https://github.com/python/cpython/issues/95415]: Use consistent syntax for platform availability. The directive now supports a content body and emits a warning when it encounters an unknown platform.

• gh-94321 [https://github.com/python/cpython/issues/94321]: Document the PEP 246 [https://peps.python.org/pep-0246/] style protocol type sqlite3.PrepareProtocol.

• gh-86128 [https://github.com/python/cpython/issues/86128]: Document a limitation in ThreadPoolExecutor where its exit handler is executed before any handlers in atexit.

• gh-61162 [https://github.com/python/cpython/issues/61162]: Clarify sqlite3 behavior when 如何使用连接上下文管理器.

• gh-87260 [https://github.com/python/cpython/issues/87260]: Align sqlite3 argument specs with the actual implementation.

• gh-86986 [https://github.com/python/cpython/issues/86986]: The minimum Sphinx version required to build the documentation is now 3.2.

• gh-88831 [https://github.com/python/cpython/issues/88831]: Augmented documentation of asyncio.create_task(). Clarified the need to keep strong references to tasks and added a code snippet detailing how to do this.

• gh-86438 [https://github.com/python/cpython/issues/86438]: Clarify that -W and PYTHONWARNINGS are matched literally and case-insensitively, rather than as regular expressions, in warnings.

• gh-93031 [https://github.com/python/cpython/issues/93031]: Update tutorial introduction output to use 3.10+ SyntaxError invalid range.

• gh-92240 [https://github.com/python/cpython/issues/92240]: Added release dates for "What's New in Python 3.X" for 3.0, 3.1, 3.2, 3.8 and 3.10

• bpo-47161 [https://bugs.python.org/issue?@action=redirect&bpo=47161]: Document that pathlib.PurePath does not collapse initial double slashes because they denote UNC paths.

• bpo-40838 [https://bugs.python.org/issue?@action=redirect&bpo=40838]: Document that inspect.getdoc(), inspect.getmodule(), and inspect.getsourcefile() might return None.

• bpo-43689 [https://bugs.python.org/issue?@action=redirect&bpo=43689]: The Differ documentation now also mentions other whitespace characters, which make it harder to understand the diff output.

• bpo-38056 [https://bugs.python.org/issue?@action=redirect&bpo=38056]: Overhaul the 错误处理方案 documentation in codecs.

• bpo-13553 [https://bugs.python.org/issue?@action=redirect&bpo=13553]: Document tkinter.Tk args.

测试

• gh-95027 [https://github.com/python/cpython/issues/95027]: On Windows, when the Python test suite is run with the -jN option, the ANSI code page is now used as the encoding for the stdout temporary file, rather than using UTF-8 which can lead to decoding errors. Patch by Victor Stinner.

• gh-96624 [https://github.com/python/cpython/issues/96624]: Fixed the failure of repeated runs of test.test_unittest caused by side effects in test_dotted_but_module_not_loaded.

• gh-95243 [https://github.com/python/cpython/issues/95243]: Mitigate the inherent race condition from using find_unused_port() in testSockName() by trying to find an unused port a few times before failing. Patch by Ross Burton.

• gh-95573 [https://github.com/python/cpython/issues/95573]: Lib/test/test_asyncio/test_ssl.py [https://github.com/python/cpython/tree/3.13/Lib/test/test_asyncio/test_ssl.py] exposed a bug in the macOS kernel where intense concurrent load on nonblocking sockets occasionally causes errno.ENOBUFS ("No buffer space available") to be emitted. FB11063974 filed with Apple, in the mean time as a workaround buffer size used in tests on macOS is decreased to avoid intermittent failures. Patch by Fantix King.

• gh-95280 [https://github.com/python/cpython/issues/95280]: Fix problem with test_ssl testgetciphers on systems that require perfect forward secrecy (PFS) ciphers.

• gh-95212 [https://github.com/python/cpython/issues/95212]: Make multiprocessing test case test_shared_memory_recreate parallel-safe.

• gh-95218 [https://github.com/python/cpython/issues/95218]: Move tests for importlib.resources into test_importlib.resources.

• gh-93963 [https://github.com/python/cpython/issues/93963]: Updated tests to use preferred location for importlib.resources ABCs.

• gh-94675 [https://github.com/python/cpython/issues/94675]: Add a regression test for re exponentional slowdown when using rjsmin.

• gh-91330 [https://github.com/python/cpython/issues/91330]: Added more tests for dataclasses to cover behavior with data descriptor-based fields.

• gh-94208 [https://github.com/python/cpython/issues/94208]: test_ssl is now checking for supported TLS version and protocols in more tests.

• gh-94315 [https://github.com/python/cpython/issues/94315]: Tests now check for DAC override capability instead of relying on os.geteuid().

• gh-54781 [https://github.com/python/cpython/issues/54781]: Rename test_tk to test_tkinter, and rename test_ttk_guionly to test_ttk. Patch by Victor Stinner.

• gh-93839 [https://github.com/python/cpython/issues/93839]: Move Lib/ctypes/test/ to Lib/test/test_ctypes/. Patch by Victor Stinner.

• gh-93951 [https://github.com/python/cpython/issues/93951]: In test_bdb.StateTestCase.test_skip, avoid including auxiliary importers.

• gh-93957 [https://github.com/python/cpython/issues/93957]: Provide nicer error reporting from subprocesses in test_venv.EnsurePipTest.test_with_pip.

• gh-93884 [https://github.com/python/cpython/issues/93884]: Add test cases for PyNumber_ToBase() that take a large number or a non-int object as parameter.

• gh-93852 [https://github.com/python/cpython/issues/93852]: test_asyncio, test_logging, test_socket and test_socketserver now create AF_UNIX domains in the current directory to no longer fail with OSError("AF_UNIX path too long") if the temporary directory (the TMPDIR environment variable) is too long. Patch by Victor Stinner.

• gh-93353 [https://github.com/python/cpython/issues/93353]: regrtest now checks if a test leaks temporary files or directories if run with -jN option. Patch by Victor Stinner.

• gh-84461 [https://github.com/python/cpython/issues/84461]: run_tests.py now handles cross compiling env vars correctly and pass HOSTRUNNER to regression tests.

• gh-93616 [https://github.com/python/cpython/issues/93616]: test_modulefinder now creates a temporary directory in ModuleFinderTest.setUp() instead of module scope.

• gh-93575 [https://github.com/python/cpython/issues/93575]: Fix issue with test_unicode test_raiseMemError. The test case now use test.support.calcobjsize to calculate size of PyUnicode structs. sys.getsizeof() may return different size when string has UTF-8 memory.

• gh-90473 [https://github.com/python/cpython/issues/90473]: WASI does not have a chmod(2) syscall. os.chmod() is now a dummy function on WASI. Skip all tests that depend on working os.chmod().

• gh-90473 [https://github.com/python/cpython/issues/90473]: Skip tests on WASI that require symlinks with absolute paths.

• gh-57539 [https://github.com/python/cpython/issues/57539]: Increase calendar test coverage for calendar.LocaleTextCalendar.formatweekday().

• gh-90473 [https://github.com/python/cpython/issues/90473]: Skip symlink tests on WASI. wasmtime uses openat2(2) with RESOLVE_BENEATH flag, which prevents symlinks with absolute paths.

• gh-89858 [https://github.com/python/cpython/issues/89858]: Fix test_embed for out-of-tree builds. Patch by Kumar Aditya.

• gh-92886 [https://github.com/python/cpython/issues/92886]: Fixing tests that fail when running with optimizations (-O) in test_imaplib.py.

• gh-92886 [https://github.com/python/cpython/issues/92886]: Fixing tests that fail when running with optimizations (-O) in test_zipimport.py

• gh-92886 [https://github.com/python/cpython/issues/92886]: Fixing tests that fail when running with optimizations (-O) in test_py_compile.py

• gh-92886 [https://github.com/python/cpython/issues/92886]: Fixing tests that fail when running with optimizations (-O) in test_sys_settrace.py.

• gh-92886 [https://github.com/python/cpython/issues/92886]: Fixing tests that fail when running with optimizations (-O) in testmultiprocessing.py

• gh-92670 [https://github.com/python/cpython/issues/92670]: Skip test_shutil.TestCopy.test_copyfile_nonexistent_dir test on AIX as the test uses a trailing slash to force the OS consider the path as a directory, but on AIX the trailing slash has no effect and is considered as a file.

• gh-92514 [https://github.com/python/cpython/issues/92514]: Remove unused test.support.BasicTestRunner. Patch by Jelle Zijlstra.

• bpo-47016 [https://bugs.python.org/issue?@action=redirect&bpo=47016]: Create a GitHub Actions workflow for verifying bundled pip and setuptools. Patch by Illia Volochii and Adam Turner.

构建

• gh-96761 [https://github.com/python/cpython/issues/96761]: Fix the build process of clang compiler for bootstrappython if LTO optimization is applied. Patch by Matthias Görgens and Donghee Na.

• gh-96883 [https://github.com/python/cpython/issues/96883]: wasm32-emscripten builds for browsers now include concurrent.futures for asyncio and unittest.mock.

• gh-85936 [https://github.com/python/cpython/issues/85936]: CPython now uses the ThinLTO option as the default policy if the Clang compiler accepts the flag. Patch by Donghee Na.

• gh-96729 [https://github.com/python/cpython/issues/96729]: Ensure that Windows releases built with Tools\msi\buildrelease.bat are upgradable to and from official Python releases.

• gh-96269 [https://github.com/python/cpython/issues/96269]: Shared module targets now depend on new MODULE_DEPS variable, which includes EXPORTSYMS. This fixes a build order issue on unsupported AIX platform.

• gh-84461 [https://github.com/python/cpython/issues/84461]: wasm32-emscripten platform no longer builds resource module, getresuid(), getresgid(), and their setters. The APIs are stubs and not functional.

• gh-95973 [https://github.com/python/cpython/issues/95973]: Add a new --with-dsymutil configure option to link debug information in macOS. Patch by Pablo Galindo.

• gh-90536 [https://github.com/python/cpython/issues/90536]: Use the BOLT post-link optimizer to improve performance, particularly on medium-to-large applications.

• gh-93744 [https://github.com/python/cpython/issues/93744]: Remove the configure --with-cxx-main build option: it didn't work for many years. Remove the MAINCC variable from configure and Makefile. Patch by Victor Stinner.

• gh-94801 [https://github.com/python/cpython/issues/94801]: Fix a regression in configure script that caused some header checks to ignore custom CPPFLAGS. The regression was introduced in gh-94802 [https://github.com/python/cpython/issues/94802].

• gh-95145 [https://github.com/python/cpython/issues/95145]: wasm32-wasi builds no longer depend on WASIX's pthread stubs. Python now has its own stubbed pthread API.

• gh-95174 [https://github.com/python/cpython/issues/95174]: Python now detects missing dup function in WASI and works around some missing errno, select, and socket constants.

• gh-95174 [https://github.com/python/cpython/issues/95174]: Python now skips missing socket functions and methods on WASI. WASI can only create sockets from existing fd / accept and has no netdb.

• gh-95085 [https://github.com/python/cpython/issues/95085]: Platforms wasm32-unknown-emscripten and wasm32-unknown-wasi have been promoted to PEP 11 [https://peps.python.org/pep-0011/] tier 3 platform support.

• gh-94847 [https://github.com/python/cpython/issues/94847]: Fixed _decimal module build issue on GCC when compiling with LTO and pydebug. Debug builds no longer force inlining of functions.

• gh-94841 [https://github.com/python/cpython/issues/94841]: Fix the possible performance regression of PyObject_Free() compiled with MSVC version 1932.

• gh-94801 [https://github.com/python/cpython/issues/94801]: configure now uses custom flags like ZLIB_CFLAGS and ZLIB_LIBS when searching for headers and libraries.

• gh-94773 [https://github.com/python/cpython/issues/94773]: deepfreeze.py now supports code object with frozensets that contain incompatible, unsortable types.

• gh-94682 [https://github.com/python/cpython/issues/94682]: Build and test with OpenSSL 1.1.1q

• gh-90005 [https://github.com/python/cpython/issues/90005]: Dependencies of readline and curses module are now detected in configure script with pkg-config. Only ncurses / ncursesw are detected automatically. The old curses library is not configured automatically. Workaround for missing termcap or tinfo library has been removed.

• gh-90005 [https://github.com/python/cpython/issues/90005]: Fix building _ctypes extension without pkg-config.

• gh-90005 [https://github.com/python/cpython/issues/90005]: _dbm module dependencies are now detected by configure.

• gh-94404 [https://github.com/python/cpython/issues/94404]: makesetup now works around an issue with sed on macOS and uses correct CFLAGS for object files that end up in a shared extension. Module CFLAGS are used before PY_STDMODULE_CFLAGS to avoid clashes with system headers.

• gh-93939 [https://github.com/python/cpython/issues/93939]: C extension modules are now built by configure and make instead of distutils and setup.py.

• gh-93939 [https://github.com/python/cpython/issues/93939]: The 2to3, idle, and pydoc scripts are now generated and installed by Makefile instead of setup.py.

• gh-94280 [https://github.com/python/cpython/issues/94280]: Updated pegen regeneration script on Windows to find and use Python 3.9 or higher. Prior to this, pegen regeneration already required 3.9 or higher, but the script may have used lower versions of Python.

• gh-93584 [https://github.com/python/cpython/issues/93584]: Address race condition in Makefile when installing a PGO build. All test and install targets now depend on all target.

• gh-93491 [https://github.com/python/cpython/issues/93491]: configure now detects and reports PEP 11 [https://peps.python.org/pep-0011/] support tiers.

• gh-69093 [https://github.com/python/cpython/issues/69093]: Fix Modules/Setup.stdlib.in rule for _sqlite3 extension.

• gh-93207 [https://github.com/python/cpython/issues/93207]: va_start() with two parameters, like va_start(args, format), is now required to build Python. va_start() is no longer called with a single parameter. Patch by Kumar Aditya.

• gh-93202 [https://github.com/python/cpython/issues/93202]: Python now always use the %zu and %zd printf formats to format a size_t or Py_ssize_t number. Building Python 3.12 requires a C11 compiler, so these printf formats are now always supported. Patch by Victor Stinner.

• gh-90473 [https://github.com/python/cpython/issues/90473]: Disable pymalloc and increase stack size on wasm32-wasi.

• bpo-34449 [https://bugs.python.org/issue?@action=redirect&bpo=34449]: Drop invalid compiler switch -fPIC for HP aCC on HP-UX. Patch by Michael Osipov.

Windows

• gh-98360 [https://github.com/python/cpython/issues/98360]: Fixes multiprocessing spawning child processes on Windows from a virtual environment to ensure that child processes that also use multiprocessing to spawn more children will recognize that they are in a virtual environment.

• gh-98414 [https://github.com/python/cpython/issues/98414]: Fix py.exe launcher handling of -V:/ option when default preferences have been set in environment variables or configuration files.

• gh-97728 [https://github.com/python/cpython/issues/97728]: Fix possible crashes caused by the use of uninitialized variables when pass invalid arguments in os.system() on Windows and in Windows-specific modules (like winreg).

• gh-90989 [https://github.com/python/cpython/issues/90989]: Made 适用于Windows的Python启动器 install per-user by default (unless an all users install already exists), and clarify some text in the installer.

• gh-97649 [https://github.com/python/cpython/issues/97649]: The Tools directory is no longer installed on Windows

• gh-96965 [https://github.com/python/cpython/issues/96965]: Update libffi to 3.4.3

• gh-96577 [https://github.com/python/cpython/issues/96577]: Fixes a potential buffer overrun in msilib.

• gh-96559 [https://github.com/python/cpython/issues/96559]: Fixes the Windows launcher not using the compatible interpretation of default tags found in configuration files when no tag was passed to the command.

• gh-94781 [https://github.com/python/cpython/issues/94781]: Fix pcbuild.proj to clean previous instances of output files in Python\deepfreeze and Python\frozen_modules directories on Windows. Patch by Charlie Zhao.

• gh-89545 [https://github.com/python/cpython/issues/89545]: Updates platform code getting the Windows version to use native Windows Management Instrumentation (WMI) queries to determine OS version, type, and architecture.

• gh-95733 [https://github.com/python/cpython/issues/95733]: Make certain requirements of the Windows Store package optional to allow installing on earlier updates of Windows.

• gh-95656 [https://github.com/python/cpython/issues/95656]: Enable the enableloadextension() sqlite3 API.

• gh-95587 [https://github.com/python/cpython/issues/95587]: Fixes some issues where the Windows installer would incorrectly detect certain features of an existing install when upgrading.

• gh-94399 [https://github.com/python/cpython/issues/94399]: Restores the behaviour of 适用于Windows的Python启动器 for usrbin/env shebang lines, which will now search PATH for an executable matching the given command. If none is found, the usual search process is used.

• gh-95445 [https://github.com/python/cpython/issues/95445]: Fixes the unsuccessful removal of the HTML document directory when uninstalling with Windows msi.

• gh-95359 [https://github.com/python/cpython/issues/95359]: Fix 适用于Windows的Python启动器 handling of py.ini commands (it was incorrectly expecting a py_ prefix on keys) and crashes when reading per-user configuration file.

• gh-95285 [https://github.com/python/cpython/issues/95285]: Fix 适用于Windows的Python启动器 handling of command lines where it is only passed a short executable name.

• gh-90844 [https://github.com/python/cpython/issues/90844]: Allow virtual environments to correctly launch when they have spaces in the path.

• gh-94772 [https://github.com/python/cpython/issues/94772]: Fix incorrect handling of shebang lines in py.exe launcher

• gh-94018 [https://github.com/python/cpython/issues/94018]: zipfile will now remove trailing spaces from path components when extracting files on Windows.

• gh-93824 [https://github.com/python/cpython/issues/93824]: Drag and drop of files onto Python files in Windows Explorer has been enabled for Windows ARM64.

• gh-43414 [https://github.com/python/cpython/issues/43414]: os.get_terminal_size() now attempts to read the size from any provided handle, rather than only supporting file descriptors 0, 1 and 2.

• gh-92817 [https://github.com/python/cpython/issues/92817]: Ensures that py.exe will prefer an active virtual environment over default tags specified with environment variables or through a py.ini file.

• gh-92984 [https://github.com/python/cpython/issues/92984]: Explicitly disable incremental linking for non-Debug builds

• gh-92841 [https://github.com/python/cpython/issues/92841]: asyncio no longer throws RuntimeError: Event loop is closed on interpreter exit after asynchronous socket activity. Patch by Oleg Iarygin.

• bpo-46907 [https://bugs.python.org/issue?@action=redirect&bpo=46907]: Update Windows installer to use SQLite 3.38.4.

• gh-91061 [https://github.com/python/cpython/issues/91061]: Accept os.PathLike for the argument to winsound.PlaySound

• bpo-42658 [https://bugs.python.org/issue?@action=redirect&bpo=42658]: Support native Windows case-insensitive path comparisons by using LCMapStringEx instead of str.lower() in ntpath.normcase(). Add LCMapStringEx to the _winapi module.

• bpo-38704 [https://bugs.python.org/issue?@action=redirect&bpo=38704]: Prevent installation on unsupported Windows versions.