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gh-140550: Docs notes for PEP 793 - #151661
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This integrates content from PEP 793's Porting Guide section.
encukou
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ericsnowcurrently,
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warsaw
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June 18, 2026 15:06
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| If you need to use any Python C API, it is recommended to call | ||
| :c:func:`PyABIInfo_Check` first to raise an exception, | ||
| rather than crash, in common cases of ABI mismatch. | ||
| Also, note that in :term:`free-threaded <free threading>` builds the export |
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There's a :term:`free-threaded build` term for this.
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| function may be called without the :term:`GIL` held even if the extension | ||
| specifies that the GIL is required. |
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Could you clarify what this means? "Calling with the GIL held" sounds like the old terminology for calling without an attached thread state. If export functions just need synchronization, then let's just say that.
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It's really the GIL here: Py_MOD_GIL_USED (or leaving Py_mod_gil out) only takes effect when Python sees it, after the hook returns.
Agree that it's confusing (and I missed a caveat, too!)
I'll expand this.
brettcannon
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June 18, 2026 20:09
Co-authored-by: Peter Bierma <zintensitydev@gmail.com>
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Thanks @encukou for the PR 🌮🎉.. I'm working now to backport this PR to: 3.15. |
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Here are a few more things for the docs of PEP 793:
abi3tmigration guidePyObject_GetTypeData/Py_TYPEwarning