IDLE

• bpo-35668 [https://bugs.python.org/issue?@action=redirect&bpo=35668]: Add docstrings to the IDLE debugger module. Fix two bugs: initialize Idb.botframe (should be in Bdb); in Idb.in_rpc_code, check whether prev_frame is None before trying to use it. Greatly expand test_debugger.

工具/示例

• gh-111903 [https://github.com/python/cpython/issues/111903]: Argument Clinic now supports the @critical_section directive that instructs Argument Clinic to generate a critical section around the function call, which locks the self object in --disable-gil builds. Patch by Sam Gross.

C API

• gh-112026 [https://github.com/python/cpython/issues/112026]: Add again the private PyThreadStateUncheckedGet() function as an alias to the new public PyThreadState_GetUnchecked() function. Patch by Victor Stinner.

• gh-112026 [https://github.com/python/cpython/issues/112026]: Restore the removed PyDictGetItemStringWithError() function. It is used by numpy. Patch by Victor Stinner.

• gh-112026 [https://github.com/python/cpython/issues/112026]: Restore removed private C API functions, macros and structures which have no simple replacement for now:

  • PyDictGetItem_KnownHash()

  • PyDictNewPresized()

  • PyHASHBITS

  • PyHASHIMAG

  • PyHASHINF

  • PyHASHMODULUS

  • PyHASHMULTIPLIER

  • PyLongCopy()

  • PyLongFromDigits()

  • PyLongNew()

  • PyLongSign()

  • PyObjectCallMethodId()

  • PyObjectCallMethodNoArgs()

  • PyObjectCallMethodOneArg()

  • PyObjectCallOneArg()

  • PyObjectEXTRA_INIT

  • PyObjectFastCallDict()

  • PyObjectGetAttrId()

  • PyObjectVectorcall()

  • PyObjectVectorcallMethod()

  • PyStackAsDict()

  • PyThreadCurrentFrames()

  • _PyUnicodeWriter structure

  • PyUnicodeWriterDealloc()

  • PyUnicodeWriterFinish()

  • PyUnicodeWriterInit()

  • PyUnicodeWriterPrepare()

  • PyUnicodeWriterPrepareKind()

  • PyUnicodeWriterWriteASCIIString()

  • PyUnicodeWriterWriteChar()

  • PyUnicodeWriterWriteLatin1String()

  • PyUnicodeWriterWriteStr()

  • PyUnicodeWriterWriteSubstring()

  • PyUnicodeAsString()

  • PyUnicodeFromId()

  • PyVectorcallFunction()

  • PyIDENTIFIER()

  • Pyc_abs()

  • Pyc_diff()

  • Pyc_neg()

  • Pyc_pow()

  • Pyc_prod()

  • Pyc_quot()

  • Pyc_sum()

  • Pystatic_string()

  • Pystatic_string_init()

Patch by Victor Stinner.

• gh-112026 [https://github.com/python/cpython/issues/112026]: Add again and includes in Python.h, but don't include them in the limited C API version 3.13 and newer. Patch by Victor Stinner.

• gh-111956 [https://github.com/python/cpython/issues/111956]: Add internal-only one-time initialization API: _PyOnceFlag and _PyOnceFlag_CallOnce.

• gh-111262 [https://github.com/python/cpython/issues/111262]: Add PyDict_Pop() and PyDict_PopString() functions: remove a key from a dictionary and optionally return the removed value. This is similar to dict.pop(), but without the default value and not raising KeyError if the key missing. Patch by Stefan Behnel and Victor Stinner.

• gh-111863 [https://github.com/python/cpython/issues/111863]: Rename Py_NOGIL to Py_GIL_DISABLED. Patch by Hugo van Kemenade.

• gh-111138 [https://github.com/python/cpython/issues/111138]: Add PyList_Extend() and PyList_Clear() functions: similar to Python list.extend() and list.clear() methods. Patch by Victor Stinner.

• gh-108765 [https://github.com/python/cpython/issues/108765]: On Windows, Python.h no longer includes the standard header file. If needed, it should now be included explicitly. Patch by Victor Stinner.

• gh-111569 [https://github.com/python/cpython/issues/111569]: Implement "Python Critical Sections" from PEP 703 [https://peps.python.org/pep-0703/]. These are macros to help replace the GIL with perobject locks in the --disable-gil build of CPython. The macros are no-ops in the default build.

• gh-111506 [https://github.com/python/cpython/issues/111506]: In the limited C API version 3.13, Py_SET_REFCNT() function is now implemented as an opaque function call. Patch by Victor Stinner.

• gh-108082 [https://github.com/python/cpython/issues/108082]: Add PyErr_FormatUnraisable() function.

• gh-110964 [https://github.com/python/cpython/issues/110964]: Move the undocumented private _PyArg functions and PyArgParser structure to internal C API (pycore_modsupport.h). Patch by Victor Stinner.

• gh-110815 [https://github.com/python/cpython/issues/110815]: Support nonASCII keyword names in PyArg_ParseTupleAndKeywords().

• gh-109587 [https://github.com/python/cpython/issues/109587]: Introduced PyUnstable_PerfTrampoline_CompileCode(), PyUnstable_PerfTrampoline_SetPersistAfterFork() and PyUnstable_CopyPerfMapFile(). These functions allow extension modules to initialize trampolines eagerly, after the application is "warmed up". This makes it possible to have perf-trampolines running in an always-enabled fashion.

• gh-85283 [https://github.com/python/cpython/issues/85283]: Add the PySys_Audit() function to the limited C API. Patch by Victor Stinner.

• gh-85283 [https://github.com/python/cpython/issues/85283]: Add PyMem_RawMalloc(), PyMem_RawCalloc(), PyMem_RawRealloc() and PyMem_RawFree() to the limited C API. Patch by Victor Stinner.

• gh-106672 [https://github.com/python/cpython/issues/106672]: Functions PyDict_GetItem(), PyDict_GetItemString(), PyMapping_HasKey(), PyMapping_HasKeyString(), PyObject_HasAttr(), PyObject_HasAttrString(), and PySys_GetObject(), which clear all errors occurred during calling the function, report now them using sys.unraisablehook().

• gh-67565 [https://github.com/python/cpython/issues/67565]: Remove redundant C-contiguity check in getargs.c, binascii, ssl and Argument Clinic. Patched by Stefan Krah and Furkan Onder

Python 3.13.0 alpha 1

Release date: 2023-10-13