Creating a multiprocessing.Queue and operating on it while being imported can lead to a deadlock. The attached file will work if run directly (python test.py) but will hang if imported from the interpreter (import test). Additional comments are in the file.
Without looking at the multiprocessing code I am willing to guess that some code in that run() function is launching some code that runs in a thread that is performing an import, deadlocking on the import lock. Jesse, is that what could be happening? If so we should probably add a note to the multiprocessing docs to not do this sort of stuff, ala http://docs.python.org/library/threading.html#importing-in-threaded-code .
