[issue33884] [multiprocessing] Multiprocessing in spawn mode doesn't work when the target is a method in a unittest.TestCase subclass, when run either with unittest or with pytest

Antoine Pitrou added the comment: While this is limitation of the spawn and forkserver modes, I don't see how this is a bug. Also, as you point out, making the method a classmethod or staticmethod works around the limitation. -- resolution: -> not a bug stage: -> resolved status:

[issue33884] [multiprocessing] Multiprocessing in spawn mode doesn't work when the target is a method in a unittest.TestCase subclass, when run either with unittest or with pytest

Change by Ned Deily : -- nosy: +davin, pitrou ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue33884] [multiprocessing] Multiprocessing in spawn mode doesn't work when the target is a method in a unittest.TestCase subclass, when run either with unittest or with pytest

New submission from Yoni Rozenshein : multiprocessing will attempt to pickle things using ForkingPickler when starting a new process in spawn mode (in Windows this is the only mode, in Linux this is a non-default but settable mode). When run within the context of a unit test, if it has to