Issues

• gh-159208: Cache one freed block per size class in pymalloc

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  python/cpython#159209·pablogsal opened Oct 12, 2026 · Updated Oct 12, 2026·Draft

• gh-158996: Check that Emscripten free-threaded build works

  DO-NOT-MERGEOS-emscriptenskip newstopic-free-threading
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  python/cpython#158997·hoodmane opened Oct 7, 2026 · Updated Oct 8, 2026·Draft

• [WIP] Reference implementation: frozendict / frozenset literals and comprehensions

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  python/cpython#152820·sobolevn opened Jul 1, 2026 · Updated Oct 5, 2026·Draft
  3

• GH-55797: Add ArgumentParser.add_mutually_inclusive_group

  3.16DO-NOT-MERGEstale
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  python/cpython#150981·savannahostrowski opened Jun 5, 2026 · Updated Sep 17, 2026·Draft
  4

• gh-149532: Remove bool.__invert__ magic method

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  python/cpython#149533·sobolevn opened May 8, 2026 · Updated Aug 10, 2026
  5

• gh-73936: Add email.saslprep (RFC 4013) and use it in smtplib for Unicode credentials

  awaiting reviewDO-NOT-MERGEstale
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  python/cpython#148692·blink1073 opened Apr 17, 2026 · Updated Aug 10, 2026
  20

• gh-146436: Implementation of PEP 786

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  python/cpython#146437·jb2170 opened Mar 25, 2026 · Updated May 18, 2026·Draft
  8

• gh-145465: Move Mac dir into Platforms

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  python/cpython#145483·smontanaro opened Mar 3, 2026 · Updated May 8, 2026
  4

• gh-142731: Prevent use-after-free in _PyObject_StoreInstanceAttribute with re-entrant __hash__

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  python/cpython#144636·VanshAgarwal24036 opened Feb 9, 2026 · Updated May 6, 2026
  3

• gh-143497: Fix default security of ftplib.FTP_TLS

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  python/cpython#143498·hartwork opened Jan 6, 2026 · Updated May 4, 2026
  2

• gh-143052: add exist_ok in copy_info func, allow merge same dir

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  python/cpython#143058·fatelei opened Dec 22, 2025 · Updated May 4, 2026
  8

• gh-139871: Optimize bytearray unique bytes iconcat

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  python/cpython#141862·cmaloney opened Nov 22, 2025 · Updated May 2, 2026
  19

• gh-138539: Fix wrong indent for docstrings in IDLE

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  python/cpython#138572·XChaitanyaX opened Sep 6, 2025 · Updated Apr 29, 2026
  2

• DRAFT: Implement PEP 802 and the {/} notation

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  python/cpython#137565·AA-Turner opened Aug 8, 2025 · Updated Apr 28, 2026·Draft
  5

• gh-137065: Unmerge types.UnionType and typing.Union

  DO-NOT-MERGEneeds backport to 3.14needs backport to 3.15stale
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  python/cpython#137069·serhiy-storchaka opened Jul 24, 2025 · Updated Sep 3, 2026·Draft
  6

• gh-133465: Efficient signal checks with detached thread state.

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  python/cpython#135358·zackw opened Jun 10, 2025 · Updated Aug 17, 2026
  5

• gh-134819: Add sys.set_object_tags and sys.get_object_tags

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  python/cpython#135073·corona10 opened Jun 3, 2025 · Updated Aug 17, 2026
  14

• gh-127011: Add __str__ and __repr__ to ConfigParser

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  python/cpython#132966·Agent-Hellboy opened Apr 25, 2025 · Updated Apr 23, 2026
  41

• gh-83461: Don't allow datetime parsing to accept non-ASCII digits

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  python/cpython#131008·StanFromIreland opened Mar 9, 2025 · Updated Aug 20, 2026
  72

• gh-127392: Removing unncessary class states in bdb.Breakpoint

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  python/cpython#127410·bombs-kim opened Nov 29, 2024 · Updated Apr 20, 2026
  1

• gh-127298: When in FIPS mode ensure builtin hashes check for usedforsecurity=False

  awaiting reviewDO-NOT-MERGE
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  python/cpython#127301·xnox opened Nov 26, 2024 · Updated Aug 27, 2026
  27

  

• gh-88427: Deprecate socket.SocketType

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  python/cpython#126272·rruuaanng opened Nov 1, 2024 · Updated Apr 19, 2026·Draft
  82

• gh-124771: Add the PYTHON_GC_PRESET env var.

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  python/cpython#124772·nascheme opened Sep 29, 2024 · Updated Aug 16, 2026·Draft
  7

• gh-102536: Added _architecture field to sys.implementation

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  python/cpython#124582·rruuaanng opened Sep 26, 2024 · Updated Apr 18, 2026·Draft
  90

• gh-124305: argparse no longer eats initial '=' from short option argument

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  python/cpython#124332·serhiy-storchaka opened Sep 23, 2024 · Updated Apr 18, 2026
  1