…103151)

This involves 3 changes: some general cleanup, checks to match the kind of module, and switch from testing against sys to _imp.

This is a precursor to gh-103150, though the changes are meant to stand on their own.

Decref the key in the right interpreter in _extensions_cache_set().

This is a follow-up to pythongh-103084. I found the bug while working on pythongh-101660.

pythongh-103151)

This involves 3 changes: some general cleanup, checks to match the kind of module, and switch from testing against sys to _imp.

This is a precursor to pythongh-103150, though the changes are meant to stand on their own.