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1. Commits on Oct 20, 2026

   • gh-159739: Reject the minimum dynamic formatting width (#159780)

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     jelle-openai

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     JelleZijlstra

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2. Commits on Oct 19, 2026

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

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     cmaloney

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     claude

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3. Commits on Oct 15, 2026

   • gh-159430: Add _PyObject_LookupSpecial error checks in bytes/weakref (GH-159432)

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     msullivan

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4. Commits on Oct 5, 2026

   • gh-158585: Adjust _PyBytes_FormatEx() allocation (#158823)

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     vstinner

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   • gh-158585: Simplify PyBytesWriter_Finish() (#158822)

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5. Commits on Oct 4, 2026

   • gh-158585: Optimize bytes object creation (#158664)

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     vstinner

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6. Commits on Oct 3, 2026

   • gh-158583: Fix uninitialized memory read in bytes.fromhex() (#158584)

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   • gh-158585: Fix _PyBytes_Resize() if hash value is already computed (#158589)

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7. Commits on Oct 2, 2026

   • gh-158585: Adjust allocation in bytes_fromformat() (#158621)

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   • gh-158585: Optimize PyBytesWriter_FinishWithSize() (#158586)

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8. Commits on Sep 29, 2026

   • gh-156939: Fix two bugs in PyBytesWriter (#158404)

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     vstinner

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     claude

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   • gh-158334: Fix bytes.translate() when the input is returned unchanged (#158344)

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     vstinner

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     fedonman

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   • gh-158219: Fix bytearray constructor to not use hashed object (#158329)

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     vstinner

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     cmaloney

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9. Commits on Sep 20, 2026

   • gh-157710: Avoid resize in PyUnicodeWriter_Finish() for singleton (#157862)

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     vstinner

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10. Commits on Sep 18, 2026

    • gh-157242: Add byteswriter_check_consistency() (#157723)

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11. Commits on Sep 15, 2026

    • gh-156939: Clear newly allocated bytes in PyBytesWriter_Resize() (#157455)

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    • gh-156939: Detect buffer overflow in bytes and bytearray (#157529)

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12. Commits on Sep 13, 2026

    • gh-156939: Detect PyBytesWriter buffer overflow earlier (#157385)

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    • gh-156939: Detect buffer overflow in PyBytesWriter in debug mode (#156943)

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13. Commits on Sep 12, 2026

    • gh-157242: Add _PyBytes_IsMutable() assertion (#157371)

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    • gh-157242: Allow negative grow in PyBytesWriter_Grow() (#157375)

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    • gh-155742: Use PyBytesWriter in bytes.translate() (#157346)

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    • gh-157242: Add more PyBytesWriter tests (#157352)

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    • gh-128213: fast path for bytes creation from list and tuple (#132590)

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14. Commits on Sep 11, 2026

    • gh-157242: Fix PyBytesWriter_Resize() on MemoryError (#157243)

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      vstinner

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      maurycy

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15. Commits on Sep 10, 2026

    • gh-156995: Fix `bytearray.take_bytes()` corrupting shared single-byte singletons (#156996)

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16. Commits on Sep 9, 2026

    • gh-129813: Check size in PyBytesWriter_FinishWithSize() (#157226)

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17. Commits on Sep 5, 2026

    • gh-129813: Fix typo in byteswriter_resize() (#156938)

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18. Commits on Aug 31, 2026

    • gh-155742: Get singleton in PyBytesWriter_FinishWithSize() (#155795)

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19. Commits on Jul 24, 2026

    • gh-153419: Fix several issues around bytearray __init__ (#153498)

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      stestagg

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      cmaloney

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20. Commits on May 24, 2026

    • gh-150285: Fix too long docstrings in builtins (GH-150293)

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      serhiy-storchaka

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21. Commits on May 16, 2026

    • gh-149816: Fix a race condition in `_PyBytes_FromList` with free-threading (#149909)

      sobolevn

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22. Commits on May 8, 2026

    • gh-100239: expose `sq_repeat` helpers for `BINARY_OP_EXTEND` (#148791)

      NekoAsakura

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23. 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)

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