Steven Myint added the comment: I didn't quite understand the multiprocessing test cases, but attached is a standalone test case that reproduces the problem. The problem only shows up when using ThreadPool.
$ python thread_pool_exception_test.py Traceback (most recent call last): File "thread_pool_exception_test.py", line 7, in <module> pool.map(exception, [1]) File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/multiprocessing/pool.py", line 255, in map return self._map_async(func, iterable, mapstar, chunksize).get() File "/opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/multiprocessing/pool.py", line 594, in get raise self._value TypeError: exceptions must derive from BaseException ---------- Added file: http://bugs.python.org/file34520/thread_pool_exception_test.py _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue20980> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com