[issue46538] [C API] Make the PyDescrObject structure opaque

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

pythoncapi_compat_pydescr_new.patch: pythoncapi_compat patch adding PyDescr_New() function with tests.

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Added file: https://bugs.python.org/file50587/pythoncapi_compat_pydescr_new.patch

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