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1. Commits on Oct 21, 2026

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

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2. Commits on Sep 27, 2026

   • gh-155496: Use Argument Clinic for more functions of the _csv module (GH-158133)

     [serhiy-storchaka]serhiy-storchaka

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3. Commits on Sep 13, 2026

   • gh-156955: Speed up csv.writer by caching the set of special characters (GH-157298)

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     [serhiy-storchaka] [claude]

     serhiy-storchaka

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4. Commits on Aug 13, 2026

   • gh-155033: Support copy.replace() for csv dialects (GH-155035)

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     [serhiy-storchaka] [claude]

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5. Commits on Apr 11, 2026

   • gh-145105: Fix crash in csv.reader with re-entrant iterator (GH-145106)

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     [raminfp]raminfp

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6. Commits on Mar 24, 2026

   • gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)

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     [befeleme] [vstinner]

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7. Commits on Mar 18, 2026

   • gh-146093: Fix csv _set_str(): check if PyUnicode_DecodeASCII() failed (#146113)

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8. Commits on Mar 17, 2026

   • gh-145966: Fix _csv DIALECT_GETATTR macro silently masking non-AttributeError exceptions (GH-145974)

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     [raminfp] [picnixz]

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9. Commits on Nov 21, 2025

   • gh-116738: Make csv module thread-safe (gh-141365)

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     [yoney]yoney

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10. Commits on Aug 24, 2025

    • gh-137986: Fix and improve the csv functions docstrings (GH-137987)

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      [serhiy-storchaka] [maurycy]

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11. Commits on Jun 2, 2025

    • gh-132813: Improve error messages for incorrect types and values of csv.Dialog attributes (GH-133241)

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      [serhiy-storchaka]serhiy-storchaka

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12. Commits on Jan 29, 2025

    • gh-129409: Fix Integer overflow - SEGV while writing data more than 2GB in CSV file (#129413)

      [srinivasreddy]srinivasreddy

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13. Commits on Jan 3, 2025

    • gh-111178: fix UBSan failures in `Modules/_csv.c` (GH-128243)

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      [picnixz]picnixz

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14. Commits on Oct 11, 2024

    • gh-116738: Make `_csv` module thread-safe (#118344)

      [aisk]aisk

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15. Commits on Oct 7, 2024

    • gh-124956: Use `#undef` for temp macros in `_csv.c` (#124957)

      [sobolevn]sobolevn

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16. Commits on Aug 29, 2024

    • gh-123446: Fix empty function names in `TypeError`s in `_csv` module (#123462)

      [sobolevn]sobolevn

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    • gh-123446: Fix empty function names in `TypeError`s in `_csv` module (#123461)

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17. Commits on Jul 25, 2024

    • gh-113785: csv: fields starting with escapechar are not quoted (GH-122110)

      [MKuranowski]MKuranowski

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18. Commits on Jun 27, 2024

    • gh-121040: Use __attribute__((fallthrough)) (#121044)

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      [vstinner] [sobolevn]

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19. Commits on May 3, 2024

    • gh-116322: Add Py_mod_gil module slot (#116882)

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      [swtaarrs]swtaarrs

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20. Commits on Mar 7, 2024

    • gh-116437: Use new C API PyDict_Pop() to simplify the code (GH-116438)

      [serhiy-storchaka]serhiy-storchaka

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21. Commits on Feb 23, 2024

    • gh-67044: Always quote or escape \r and \n in csv.writer() (GH-115741)

      [serhiy-storchaka]serhiy-storchaka

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22. Commits on Feb 20, 2024

    • gh-115712: Support CSV dialects with delimiter=' ' and skipinitialspace=True (GH-115721)

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      [serhiy-storchaka]serhiy-storchaka

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23. Commits on Jan 30, 2024

    • gh-113732: Fix support of QUOTE_NOTNULL and QUOTE_STRINGS in csv.reader (GH-113738)

      [serhiy-storchaka]serhiy-storchaka

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24. Commits on Jan 22, 2024

    • gh-113796: Add more validation checks in the csv.Dialect constructor (GH-113797)

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      [serhiy-storchaka]serhiy-storchaka

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25. Commits on Jan 18, 2024

    • gh-114123: Migrate docstring from _csv to csv (#114124)

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      [smontanaro] [AA-Turner] [merwok]

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26. Commits on Jan 10, 2024

    • gh-70835: Clarify error message for CSV file opened with wrong newline (GH-113786)

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      [serhiy-storchaka]serhiy-storchaka

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27. Commits on Nov 27, 2023

    • gh-111789: Use PyDict_GetItemRef() in Modules/_csv.c (gh-112073)

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28. Commits on Oct 17, 2023

    • gh-110964: Remove private _PyArg functions (#110966)

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      [vstinner]vstinner

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29. Commits on Aug 24, 2023

    • gh-108444: Replace _PyLong_AsInt() with PyLong_AsInt() (#108459)

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30. Commits on Jul 25, 2023

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

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31. Commits on Jul 12, 2023

    • gh-106521: Remove _PyObject_LookupAttr() function (GH-106642)

      [serhiy-storchaka]serhiy-storchaka

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32. Commits on Jun 1, 2023

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

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33. Commits on May 7, 2023

    • gh-104265 Disallow instantiation of `_csv.Reader` and `_csv.Writer` (#104266)

      [chgnrdv]chgnrdv

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34. Commits on May 5, 2023

    • gh-99113: Add Py_MOD_PER_INTERPRETER_GIL_SUPPORTED (gh-104205)

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      [ericsnowcurrently]ericsnowcurrently

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