[issue41567] multiprocessing.Pool from concurrent threads failure on 3.9.0rc1

[Atsuo Ishimoto]

Atsuo Ishimoto <ishimoto at python.jp> added the comment:

multiprocessing module used to work multithread environment until https://bugs.python.org/issue35943 merged.

I guess we can make multiprocessing thread-safe again if we move local imports to global.
Does it make sense?

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nosy: +ishimoto

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