Issues

• [C API] Add all macros to Misc/stable_abi.toml

  topic-C-API
  python/cpython#158886 · Filter by author vstinner opened on Oct 5, 2026
  6

• gh-149044: Fix PySlot_END macro for C++

  awaiting core reviewneeds backport to 3.15topic-C-APItype-feature
  Unread
  python/cpython#158866·vstinner opened Oct 5, 2026 · Updated Oct 6, 2026
  7

• [C API] Add Py_SETREF() and Py_XSETREF() macros to the limited C API 3.16

  interpreter-coretopic-C-APItype-feature
  python/cpython#158842 · Filter by author vstinner opened on Oct 5, 2026
  1

• PyMonitoring_FirePyStartEvent results in incorrect duplicate calls to sys.setprofile profile functions

  interpreter-coretopic-C-API
  python/cpython#158711 · Filter by author godlygeek opened on Oct 4, 2026
  4

• C API: Rework and enhance the PyBytesWriter implementation

  interpreter-coretopic-C-APItype-refactor
  python/cpython#158585 · Filter by author vstinner opened on Oct 2, 2026
  3

• C API: Rework and enhance the PyUnicodeWriter implementation

  interpreter-coretopic-C-APItype-refactor
  python/cpython#158451 · Filter by author vstinner opened on Sep 29, 2026

• C API: Remove deprecated PySlice_GetIndicesEx(), or remove the deprecation

  interpreter-coretopic-C-APItype-feature
  python/cpython#158077 · Filter by author vstinner opened on Sep 24, 2026
  4

• C API: Remove deprecated PyBytesObject.ob_shash member, or remove the deprecation

  interpreter-coretopic-C-APItype-feature
  python/cpython#158074 · Filter by author vstinner opened on Sep 24, 2026
  3

• C API: Soft deprecate functions modifying str objects (PyUnicodeObject)

  interpreter-coretopic-C-APItype-feature
  python/cpython#157710 · Filter by author vstinner opened on Sep 17, 2026
  1

• The Python C API should only define macros with a name starting wit Py

  buildextension-modulesinfrainterpreter-coretopic-C-API
  python/cpython#157695 · Filter by author vstinner opened on Sep 17, 2026
  9

• gh-154610: Add !R to f-string and %#R to PyUnicode_FromFormat()

  teststopic-C-API
  Unread
  python/cpython#157685·vstinner opened Sep 17, 2026 · Updated Sep 17, 2026·Draft
  4

• PyImport_CreateModuleFromInitfunc(): wrong __name__ for submodules, non-ASCII names rejected, inittab name clashes

  interpreter-coretopic-C-APItype-bug
  python/cpython#157384 · Filter by author itamaro opened on Sep 13, 2026
  1

• [3.15] gh-121617: Fix Py_CLEAR() in C++: replace NULL with _Py_NULL (GH-157067)

  awaiting mergeskip newstopic-C-API
  Unread
  python/cpython#157186·miss-islington opened Sep 8, 2026 · Updated Sep 8, 2026
  1

• Replace some autogenerated Stable ABI notes with manual ones

  docstopic-C-API
  python/cpython#156870 · Filter by author encukou opened on Sep 3, 2026
  2

• PyCode_Addr2Line point to out of date PEP 626

  docstopic-C-API
  python/cpython#156725 · Filter by author colesbury opened on Aug 31, 2026
  1

• Py_UNICODE_TOUPPER() and friends do not return the simple case mappings

  extension-modulestopic-C-APItopic-unicodetype-bug
  python/cpython#156518 · Filter by author serhiy-storchaka opened on Aug 28, 2026

• Add PyUnstable_InterpreterFrame_GetLocal to read a local var from an interp. frame

  interpreter-coretopic-C-APItype-feature
  python/cpython#156133 · Filter by author guilhermeleobas opened on Aug 20, 2026

• PyUnicode_DecodeCharmap: mapping argument not fully documented

  docseasytopic-C-API
  python/cpython#156098 · Filter by author srittau opened on Aug 20, 2026

• Add PyMethod_New to the stable ABI / limited API

  topic-C-APItype-feature
  python/cpython#155588 · Filter by author NicolasT opened on Aug 11, 2026

• C API: Enable limited C API tests on Free Threading

  teststopic-C-API
  python/cpython#155561 · Filter by author vstinner opened on Aug 11, 2026

• C API: Add more tests on PyType functions

  teststopic-C-API
  python/cpython#155503 · Filter by author vstinner opened on Aug 10, 2026
  1

• PyConfig.lazy_imports is missing from the C API configuration docs

  docstopic-C-APItopic-lazy-imports
  python/cpython#155273 · Filter by author fedonman opened on Aug 6, 2026

• test_capi: test_threadstate_set_stack_protection is flaky on Azure CI

  teststopic-C-APItype-bug
  python/cpython#154763 · Filter by author IvyXu420 opened on Jul 27, 2026
  1

• 26 C APIs scheduled for removal in 3.16 are still present

  interpreter-coretopic-C-APItype-feature
  python/cpython#154757 · Filter by author fedonman opened on Jul 27, 2026
  3

• Potential integer overflows in Objects/abstract.c buffer copy APIs

  interpreter-coretopic-C-APItype-bug
  python/cpython#153689 · Filter by author imabd645 opened on Jul 14, 2026