I've been working on adding support for 3.13 to mypyc. After updating the codebase, there are still some functions left we depend on which are now private after #106320. Would it make sense to export these again? That would make adopting 3.13 a bit easier. /CC @vstinner

• _PyBytes_Join defined in pycore_bytesobject.h
• _PyObject_CallMethodIdObjArgs defined in pycore_call.h
• _PyType_CalculateMetaclass defined in pycore_object.h
• _PyUnicode_EQ defined in pycore_unicodeobject.h
• _PyUnicode_FastCopyCharacters defined in pycore_unicodeobject.h (this could be replaced with PyUnicode_CopyCharacters but it's used in a simplified copy of _PyUnicode_JoinArray which also uses _PyUnicode_FastCopyCharacters).

Other functions include these two. However, as they are inlined, it isn't a problem to include them.

• _PyObject_CallMethodIdNoArgs and _PyObject_CallMethodIdOneArg defined in pycore_call.h

It would be fine to keep all of them in internal/pycore_* and just add PyAPI_FUNC.

/CC @hauntsaninja

Linked PRs

• gh-121489: Export private _PyBytes_Join() again #122094
• [3.13] gh-121489: Export private _PyBytes_Join() again #122266
• gh-121489: Export private _PyBytes_Join() again #122267
• [3.13] gh-121489: Export private _PyBytes_Join() again (GH-122267) #122287