Graham Cummins added the comment:
As far as I can tell, this is a version of the scope-dependent un-pickling
issue mentioned in the documentation. I'm still rather confused, since in the
original occurrence of the issue happens despite the fact that subprocesses
should be able to impor
New submission from Graham Cummins :
When attempting to pass instances of a custom class in the argument list
of a multiprocessing.Pool.map call, I encounter an inexplicable AttributeError.
A simplified test script that creates the bug is included. It fails for both
Python 2.7.1 and 3.2 on my
