[issue40327] list(sys.modules.items()) can throw RuntimeError: dictionary changed size during iteration

Andrew Nelson added the comment: Just to mention that we have seen similar issues whilst importing scipy in a multiprocessing context. See https://github.com/scipy/scipy/issues/11479 and https://stackoverflow.com/questions/68911221/python-runtimeerror-dictionary-changed-size-during-iteration

[issue38501] multiprocessing.Pool hangs atexit (and garbage collection sometimes)

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