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Cpython v3.15.0a1

Cpython: v3.15.0a1 Release

Release date:
October 14, 2025
Previous version:
v3.14.3 (released February 3, 2026)
Magnitude:
27,178 Diff Delta
Contributors:
26 total committers
Data confidence:
Commits:
674 impacting commits

232 Features Released with v3.15.0a1

[3.14] gh-136264: Fix ``--relative-paths`` for PEP 739's build-details.json (GH-138510)
#138638
[3.14] GH-101100: Remove some entries from ``nitpick_ignore`` (GH-138464)
#138683
[3.14] gh-101100: Resolve reference warnings in reference/ (GH-138418)
#138680
[3.14] gh-138577: Mention Unix-specific limitations of `getpass.getpass(echo_char=...)` (GH-138677)
#138696
[3.14] gh-137242: Add a --no-randomize option, and use it in Android CI (GH-138649)
#138684
[3.14] annotationlib: add note on security to docs (GH-138508)
#138550
[3.14] gh-138665: Move `platform.invalidate_caches` docs (GH-138667)
#138668
[3.14] gh-138253: Fix compatibility of sub-interpreters queues with queue.Queue (GH-138256)
#138367
[3.14] gh-138297 Point link in docs for `finally` to try/else, instead of if/else (GH-138298)
#138381
[3.14] gh-89905: Correct `-R` option doc (GH-137608)
#138353
[3.14] gh-138295: Fix a grammar issue in the descriptor HOWTO (GH-138296)
#138299
[3.14] gh-138659: Typo in the gc module docstring (GH-138660)
#138662
[3.14] gh-138318, PyREPL: builtins should not be highlighted when used as attribute names (GH-138319)
#138654
[3.14] Use `test.support.is_wasm32` flag for `is_emscripten` or `is_wasi` for generic checks (GH-136815)
#138643
[3.14] Docs: Fix typo in test.support.linked_to_musl function name (GH-138406)
#138445
Fix the reference to unicode specification
#139138
[3.14] gh-118803: Improve documentation around `ByteString` deprecation (GH-139115)
#139136
[3.14] gh-137242: Mention Android binary releases in documentation (GH-138305)
#139124
[3.14] Synced docs and docstring for `sysconfig.get_platform` (GH-135530)
#138976
[3.14] GH-123299: Copyedit 3.14 What's New: New and Improved Modules (GH-139530)
#139555
[3.14] gh-138130: Fix return value of libc_ver() on Emscripten (GH-138132)
#138312
[3.14] gh-138703: clarify data buffer requirement of `asyncio.StreamWriter.write` (GH-139564)
#139570
[3.14] GH-123299: Copyedit 3.14 What's New: Other Language Changes (GH-139425)
#139508
[3.14] gh-118767: Remove ``bool(NotImplemented)`` from pending-removal document (GH-139526)
#139599
[3.14] gh-139495: Fix `hashlib.file_digest()` versionchanged description of `BlockingIOError` (GH-139496)
#139522
[3.14] gh-105987: unskip `test_issue105987` from `test_asyncio.test_eager_task_factory` (GH-139538)
#139539
[3.14] gh-139310: skip `test_aead_aes_gcm` for Linux kernel between 6.16.0 and 6.17.x (GH-139552)
#139594
[3.14] Document `Py_AddPendingCall()` change with subinterpreters in 3.12 (GH-139117)
#139118
[3.14] gh-139487: add missing imports for standalone doctest `Enum` examples (GH-139488)
#139493
[3.14] gh-137638: Use macos-15-intel in GitHub Actions (GH-139154)
#139545

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Top Contributors in v3.15.0a1

miss-islington
picnixz
jihugo
vstinner
ericsnowcurrently
serhiy-storchaka
markshannon
freakboy3742
brettcannon
JelleZijlstra

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