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1. Commits on Nov 5, 2026

   • gh-160427: Return None from TextIOWrapper.buffer when detached (#160802)

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   • gh-158928: Fix overflow in bytearray.__init__ from an iterator (#158947)

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     cmaloney

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     claude

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2. Commits on Nov 4, 2026

   • gh-159184: Do not intern NaN constants on the free-threaded build (GH-161276)

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     cmaloney

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     claude

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3. Commits on Nov 3, 2026

   • gh-87613: Use AC and AC vectorcall for filter (#160792)

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     cmaloney

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     claude

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   • Add @cmaloney to CODEOWNERS for `io` (#161269)

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     cmaloney

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   • gh-157006: Fix test_embed when PYTHONSTARTUP is set (#157007)

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   • gh-159446: Avoid TypeError on FileIO construction (#159480)

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     cmaloney

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     claude

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   • gh-87613: AC VC add support for *args and use it for zip (#160944)

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4. Commits on Nov 1, 2026

   • gh-87613: Use AC and AC vectorcall for bool (#160791)

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     cmaloney

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5. Commits on Oct 31, 2026

   • gh-159500: Speed up asyncio StreamReader.readline() and readuntil() (#159505)

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6. Commits on Oct 29, 2026

   • gh-160858: Use the list freelist in list() (gh-160859)

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   • gh-160781: Fix `BytesIO` overflow handling for large sizes (#160783)

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   • gh-160781: Fix `StringIO.truncate()` rejecting sizes above `2**31 - 1` on Windows (#160784)

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7. Commits on Oct 23, 2026

   • gh-158895: Teach libregrtest to output github job summaries (GH-158896)

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     cmaloney

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   • gh-154175: Remove time.sleep in test_io daemon test (#157019)

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   • gh-151814: Add test for TextIOWrapper.write unbounded memory growth from repeated writes (GH-152244)

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   • gh-87613: Allow Argument Clinic vectorcall on heap types (#160115)

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     cmaloney

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8. Commits on Oct 21, 2026

   • gh-144725: Relax over-strict alignment test on arrays (#157530)

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     cmaloney

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     jakelishman

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9. Commits on Oct 19, 2026

   • gh-87613: Use AC vectorcall for bytes and bytearray (#158891)

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     cmaloney

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10. Commits on Oct 13, 2026

    • gh-87613: Use AC vectorcall for float (GH-158201)

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11. Commits on Oct 6, 2026

    • gh-126273: Fix make clinic warnings (#158892)

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12. Commits on Oct 5, 2026

    • gh-157407: Use _PyUnicode_AsUTF8NoNUL for AC 's' and 'z' converters (#158210)

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13. Commits on Sep 10, 2026

    • gh-87613: Argument Clinic vectorcall decorator (GH-145381)

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      cmaloney

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14. Commits on Aug 8, 2026

    • gh-111330: Fix GC of _pyio.BytesIO with exports (GH-152335)

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15. Commits on Aug 7, 2026

    • gh-81954: Warn when ZipFile is closed with unwritten data (#152354)

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16. Commits on Jul 6, 2026

    • Docs: Link to the `contextlib.chdir` context manager in the `os.chdir` docs (#153152)

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      cmaloney

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      StanFromIreland

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17. Commits on Jun 19, 2026

    • gh-101100: Document os.uname_result and os.statvfs_result with related constants (GH-151301)

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18. Commits on Jun 11, 2026

    • gh-101100: Fix Sphinx nitpick in `unittest.mock.rst` (#151302)

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19. Commits on Jun 9, 2026

    • gh-143008: Fix Null pointer dereferences in TextIOWrapper underlying stream access (#145957)

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20. Commits on Jun 5, 2026

    • gh-129011: Update docs for Raw I/O read, readinto, and write (#135328)

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21. Commits on May 9, 2026

    • gh-139871: Fix 3.15 bytearray.take_bytes example (#149520)

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22. Commits on Mar 30, 2026

    • gh-139633: Run netrc file permission check only once per parse (GH-139634)

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23. Commits on Mar 11, 2026

    • gh-101100: Fix sphinx reference warnings around I/O (#139592)

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      cmaloney

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      willingc

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24. Commits on Jan 13, 2026

    • gh-132108: Add Buffer Protocol support to int.from_bytes to improve performance (#132109)

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25. Commits on Dec 24, 2025

    • Move News for gh-142560 to Core and Builtins (GH-143154)

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