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1. Commits on Oct 5, 2026

   • [3.15] Revert backports merged during the 3.15.0 release freeze on 5 October (#158873)

     pablogsal

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   • [3.15] gh-158583: Fix uninitialized memory read in bytes.fromhex() (GH-158584) (#158691)

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     miss-islington

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     vstinner

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2. Commits on Sep 30, 2026

   • [3.15] gh-156939: Fix two bugs in PyBytesWriter (#158404) (#158409)

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     vstinner

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     claude

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3. Commits on Sep 10, 2026

   • [3.15] gh-156995: Fix `bytearray.take_bytes()` corrupting shared single-byte singletons (GH-156996) (#157260)

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4. Commits on Sep 5, 2026

   • [3.15] gh-129813: Fix typo in byteswriter_resize() (GH-156938) (#156979)

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     miss-islington

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     vstinner

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5. Commits on Jul 24, 2026

   • [3.15] gh-153419: Fix several issues around bytearray __init__ (GH-153498) (#154622)

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6. Commits on May 24, 2026

   • [3.15] gh-150285: Fix too long docstrings in builtins (GH-150293) (GH-150336)

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     miss-islington

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     serhiy-storchaka

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7. Commits on May 16, 2026

   • [3.15] gh-149816: Fix a race condition in `_PyBytes_FromList` with free-threading (GH-149909) (#149911)

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     miss-islington

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     sobolevn

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8. Commits on Apr 16, 2026

   • GH-145668: Add FOR_ITER specialization for virtual iterators. Specialize GET_ITER. (GH-147967)

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     markshannon

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   • gh-100239: Specialize more binary operations using BINARY_OP_EXTEND (GH-128956)

     eendebakpt

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9. Commits on Apr 1, 2026

   • gh-147944: Increase range of bytes_per_sep (GH-147946)

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     serhiy-storchaka

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10. Commits on Mar 31, 2026

    • gh-147856: Allow the 'count' argument of `bytes.replace()` to be a keyword (#147943)

      StanFromIreland

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11. Commits on Jan 26, 2026

    • gh-142037: Fix a refleak introduced in GH-142081 (GH-144256)

      serhiy-storchaka

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12. Commits on Jan 24, 2026

    • gh-142037: Improve error messages for printf-style formatting (GH-142081)

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      serhiy-storchaka

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13. Commits on Jan 22, 2026

    • gh-144157: Optimize bytes.translate() by deferring change detection (GH-144158)

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      gpshead

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14. Commits on Nov 13, 2025

    • gh-139871: Add `bytearray.take_bytes([n])` to efficiently extract `bytes` (GH-140128)

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15. Commits on Nov 6, 2025

    • gh-140939: Fix memory leak in `_PyBytes_FormatEx` error path (#140957)

      StanFromIreland

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16. 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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17. Commits on Sep 24, 2025

    • gh-139156: Use PyBytesWriter in _PyUnicode_EncodeCharmap() (#139251)

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      vstinner

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18. Commits on Sep 23, 2025

    • gh-129813, PEP 782: Remove the private _PyBytesWriter API (#139264)

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      vstinner

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19. Commits on Sep 18, 2025

    • gh-129813, PEP 782: Optimize byteswriter_resize() (#139101)

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      vstinner

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20. Commits on Sep 17, 2025

    • gh-129813, PEP 782: Set invalid bytes in PyBytesWriter (#139054)

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      vstinner

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    • gh-71679: Share the repr implementation between bytes and bytearray (GH-138181)

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      serhiy-storchaka

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21. Commits on Sep 15, 2025

    • gh-129813, PEP 782: Add PyBytesWriter.overallocate (#138941)

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      vstinner

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    • gh-129813, PEP 782: Init small_buffer in PyBytesWriter_Create() (#138924)

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      vstinner

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    • gh-129813, PEP 782: Use PyBytesWriter in _PyBytes_FormatEx() (#138839)

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      vstinner

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22. Commits on Sep 13, 2025

    • gh-129813, PEP 782: Use PyBytesWriter in _PyBytes_FromList() (#138837)

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      vstinner

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    • gh-129813, PEP 782: Use Py_GetConstant(Py_CONSTANT_EMPTY_BYTES) (#138830)

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      vstinner

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    • gh-129813, PEP 782: Use PyBytesWriter in _PyBytes_DecodeEscape2() (#138838)

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      vstinner

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23. Commits on Sep 12, 2025

    • gh-129813, PEP 782: Add PyBytesWriter_Format() (#138824)

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      vstinner

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    • gh-129813, PEP 782: Add PyBytesWriter C API (#138822)

      vstinner

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24. Commits on Aug 18, 2025

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

      AA-Turner

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25. Commits on Aug 14, 2025

    • gh-130821: Add type information to error messages for invalid return type (GH-130835)

      donbarbos

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26. Commits on May 12, 2025

    • gh-133767: Fix use-after-free in the unicode-escape decoder with an error handler (GH-129648)

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      serhiy-storchaka

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27. Commits on Mar 24, 2025

    • gh-130928: Fix error message during bytes formatting for the `'i'` flag (#130967)

      ApostolFet

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