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1. Commits on Oct 31, 2026

   • gh-160324: Keep `io.StringIO` state after `MemoryError` (GH-160325)

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     gpshead

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2. Commits on Oct 29, 2026

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

     cmaloney

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     0bfee22View commit details

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3. Commits on Oct 24, 2026

   • gh-159739: Keep text I/O state valid across reentrant callbacks (#160398)

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     jelle-openai

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4. Commits on Oct 21, 2026

   • gh-114258: Update AC to support @critical_section for tp_iternext (gh-159962)

     corona10

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5. Commits on Sep 24, 2026

   • gh-155496: Use Argument Clinic for more functions of the _io module (GH-155511)

     serhiy-storchaka

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6. Commits on Jul 25, 2026

   • gh-153296: Fix thread-safety data race in io.StringIO iterator (#153368)

     Twix1288

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7. Commits on Jun 1, 2026

   • gh-149046: fix: correctly handle `str` subclasses in `io.StringIO` (#149047)

     KowalskiThomas

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     c987736View commit details

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8. Commits on May 24, 2026

   • gh-150285: Fix too long docstrings in the io module (GH-150287)

     serhiy-storchaka

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     160dc74View commit details

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9. Commits on Mar 23, 2026

   • gh-146175: Soft-deprecate outdated macros; convert internal usage (GH-146178)

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     encukou

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     vstinner

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10. Commits on Nov 11, 2025

    • gh-141376: Fix exported symbols (GH-141377)

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      vstinner

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11. Commits on Jun 30, 2025

    • gh-135607: remove null checking of weakref list in dealloc of extension modules and objects (#135614)

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12. Commits on Jun 12, 2025

    • Revert "gh-135410: use a critical section around `StringIO.__next__` (#135412)" (#135439)

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      ZeroIntensity

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    • gh-135410: use a critical section around `StringIO.__next__` (#135412)

      ZeroIntensity

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      e6c3039View commit details

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13. Commits on May 9, 2025

    • fix thread safety of `io.StringIO.truncate` (#133732)

      kumaraditya303

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14. Commits on Feb 8, 2025

    • gh-111178: fix UBSan failures in `Modules/_io/*.c` (GH-129083)

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      picnixz

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15. Commits on Jan 23, 2025

    • gh-119182: Use public PyUnicodeWriter in stringio.c (#129243)

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      vstinner

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16. Commits on Jan 20, 2025

    • gh-111178: Generate correct signature for most self converters (#128447)

      erlend-aasland

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      537296cView commit details

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17. Commits on Nov 25, 2024

    • gh-127182: Fix `io.StringIO.__setstate__` crash when `None` is the first value (#127219)

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      sobolevn

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      vstinner

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18. Commits on Oct 9, 2024

    • gh-115754: Use Py_GetConstant(Py_CONSTANT_EMPTY_STR) (#125194)

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      vstinner

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19. Commits on Jun 21, 2024

    • gh-113993: Allow interned strings to be mortal, and fix related issues (GH-120520)

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      encukou

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      ericsnowcurrently

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20. Commits on Dec 13, 2023

    • gh-112205: Support `@setter` annotation from AC (gh-112922)

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21. Commits on Nov 30, 2023

    • gh-112205: Update stringio module to use AC for the thread-safe (gh-112549)

      corona10

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22. Commits on Nov 19, 2023

    • gh-111965: Using critical sections to make ``io.StringIO`` thread safe. (gh-112116)

      aisk

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23. Commits on Jul 25, 2023

    • gh-106869: Use new PyMemberDef constant names (#106871)

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      vstinner

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24. Commits on Jul 2, 2023

    • gh-104922: remove PY_SSIZE_T_CLEAN (#106315)

      methane

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      d5bd32fView commit details

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25. Commits on Jun 1, 2023

    • gh-92536: Remove PyUnicode_READY() calls (#105210)

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      vstinner

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26. Commits on May 15, 2023

    • gh-101819: Isolate `_io` (#101948)

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27. Commits on May 5, 2023

    • gh-101819: Prepare to modernize the _io extension (#104178)

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      vstinner

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      erlend-aasland

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28. Commits on Feb 20, 2023

    • gh-101819: Adapt _io types to heap types, batch 1 (GH-101949)

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      erlend-aasland

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29. Commits on Nov 22, 2022

    • gh-99537: Use Py_SETREF() function in C code (#99656)

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      vstinner

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30. Commits on Nov 14, 2022

    • gh-99300: Use Py_NewRef() in Modules/ directory (#99467)

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      vstinner

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31. Commits on Jul 27, 2022

    • gh-95005: Replace PyAccu with PyUnicodeWriter (gh-95006)

      aivarsk

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      8c88e36View commit details

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32. Commits on Feb 23, 2022

    • bpo-46765: Replace Locally Cached Strings with Statically Initialized Objects (gh-31366)

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      ericsnowcurrently

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33. Commits on Apr 15, 2020

    • bpo-40268: Remove unused structmember.h includes (GH-19530)

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      vstinner

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34. Commits on Mar 4, 2020

    • bpo-39573: Finish converting to new Py_IS_TYPE() macro (GH-18601)

      petdance

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      dffe4c0View commit details

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