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1. Commits on Jul 18, 2026

   • gh-153908: Fix data race in `itertools.count.__repr__` (GH-153917)

     johng

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     5200f11View commit details

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2. Commits on Jul 10, 2026

   • gh-153062: Fix a crash iterating itertools.tee on the free-threaded build (gh-153063)

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     tonghuaroot

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     nascheme

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     6c389c4View commit details

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3. Commits on Jun 2, 2026

   • gh-150319: Replace all documentation which says "See PEP 585" (#150325)

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     4 peopleauthored
     50fe49cView commit details

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4. Commits on May 24, 2026

   • gh-150285: Fix too long docstrings in Argument Clinic code (GH-150338)

     serhiy-storchaka

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     287c98fView commit details

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5. Commits on Apr 2, 2026

   • GH-145247: Use _PyTuple_FromPair in Modules (part 1) (#148000)

     sergey-miryanov

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     0c10066View commit details

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   • gh-146613: Fix re-entrant use-after-free in `itertools._grouper` (#147962)

     TheSkyC

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     fc7a188View commit details

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6. Commits on Mar 27, 2026

   • gh-123471: Make `itertools.zip_longest` safe in the FT build (#146033)

     eendebakpt

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     9214e3fView commit details

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7. Commits on Mar 24, 2026

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

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     befeleme

     and

     vstinner

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     1887a95View commit details

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8. Commits on Mar 16, 2026

   • gh-123471: make concurrent iteration over itertools.accumulate thread-safe (#144486)

     eendebakpt

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     3a24856View commit details

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9. Commits on Mar 9, 2026

   • gh-145376: Fix various reference leaks in Objects/ and Modules/ (#145385)

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     eendebakpt

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     blurb-it[bot]

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     886bc6eView commit details

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10. Commits on Feb 9, 2026

    • gh-143543: Fix re-entrant use-after-free in itertools.groupby (GH-143738)

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      3 peopleauthored
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11. Commits on Feb 4, 2026

    • gh-123471: Make concurrent iteration over `itertools.permutations` and `itertools.combinations_with_replacement` thread-safe (gh-144402)

      eendebakpt

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      009c8c0View commit details

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12. Commits on Oct 15, 2025

    • gh-140061: Use `_PyObject_IsUniquelyReferenced()` to check if objects are uniquely referenced (gh-140062)

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      sergey-miryanov

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      32c2649View commit details

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13. Commits on Oct 11, 2025

    • gh-111489: Remove _PyTuple_FromArray() alias (#139973)

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      vstinner

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14. Commits on Sep 2, 2025

    • GH-135763: AC: Use ``Py_ssize_t(allow_negative=False)`` (#138394)

      AA-Turner

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      98b4cd6View commit details

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15. Commits on Aug 18, 2025

    • GH-137623: Use an AC decorator for docstring line length enforcement (#137690)

      AA-Turner

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16. Commits on Jun 30, 2025

    • gh-123471: Make itertools.product and itertools.combinations thread-safe (#132814)

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      eendebakpt

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      kumaraditya303

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      847d1c2View commit details

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    • gh-123471: Make itertools.chain thread-safe (#135689)

      eendebakpt

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      0533c1fView commit details

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17. Commits on Jun 2, 2025

    • gh-123471: make concurrent iteration over `itertools.cycle` safe under free-threading (#131212)

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      eendebakpt

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      kumaraditya303

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      26a1cd4View commit details

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18. Commits on Apr 13, 2025

    • gh-123471: Make concurrent iteration over itertools.repeat safe under free-threading (#131247)

      eendebakpt

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      9d127e8View commit details

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19. Commits on Mar 27, 2025

    • gh-131525: Cache the result of tuple_hash (#131529)

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      3 peopleauthored
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20. Commits on Mar 12, 2025

    • gh-111178: Change Argument Clinic signature for `@classmethod` (#131157)

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      vstinner

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      061da44View commit details

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    • gh-123471: make `itertools.batched` thread-safe (#129416)

      eendebakpt

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      405a2d7View commit details

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21. Commits on Feb 19, 2025

    • gh-111178: fix UBSan failures in `Modules/itertoolsmodule.c` (GH-129780)

      picnixz

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      f8c041bView commit details

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22. Commits on Dec 2, 2024

    • gh-126618: fix repr(itertools.count(sys.maxsize)) (#127048)

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      skirpichev

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      picnixz

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      930ba0cView commit details

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23. Commits on Nov 12, 2024

    • gh-126595: fix a crash when calling `itertools.count(sys.maxsize)` (#126617)

      picnixz

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      6e3bb8aView commit details

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24. Commits on Sep 25, 2024

    • gh-123884 Tee of tee was not producing n independent iterators (gh-124490)

      rhettinger

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      909c6f7View commit details

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25. Commits on May 21, 2024

    • gh-117657: Fix itertools.count thread safety (#119268)

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      wiggin15

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      87939bdView commit details

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26. Commits on May 9, 2024

    • GH-101588: Remove deprecated pickle/copy/deepcopy from itertools (gh-118816)

      rhettinger

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      e8cbcf4View commit details

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27. Commits on May 3, 2024

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

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      swtaarrs

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      c2627d6View commit details

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28. Commits on Apr 30, 2024

    • gh-118218: Reuse return tuple in itertools.pairwise (GH-118219)

      hauntsaninja

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      6999d68View commit details

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29. Commits on Apr 12, 2024

    • gh-117764: Add signatures for some objects in the itertools module (GH-117774)

      serhiy-storchaka

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      49af71aView commit details

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30. Commits on Mar 18, 2024

    • gh-115874: Don't use module state in teedataobject tp_dealloc (#116204)

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      erlend-aasland

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      brandtbucher

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      e2fcaf1View commit details

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31. Commits on Mar 4, 2024

    • Consistently spell out *predicate* instead of *pred*. (gh-116308)

      rhettinger

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      15dc297View commit details

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32. Commits on Dec 16, 2023

    • gh-113202: Add a strict option to itertools.batched() (gh-113203)

      rhettinger

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      1583c40View commit details

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