Brett Cannon <br...@python.org> added the comment: So first, don't import from threads. It's non-deterministic as you have seen. You should do all imports **before** you start running multi-threaded code if multiple threads are going to access the
Second, tossing in pickle is just asking for more trouble. 😉 The key thing to know is the master copy of a module is kept in `sys.modules`. But classes keep a reference to the module they were loaded from, not what `sys.modules` happens to have at that moment. So due to threading indeterminism it's quite possible to end up unpickling in such a way that the module that eventually ends up in `sys.modules` is not what your unpickled class is referencing. As such, I'm closing as "wont fix". ---------- resolution: -> wont fix stage: -> resolved status: open -> closed _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue44916> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
