Python 2.7.3 (default, Apr 10 2012, 23:31:26) [MSC v.1500 32 bit (Intel)] on win32

Type "help", "copyright", "credits" or "license" for more information.

The docs claim that "multiprocessing.dummy replicates the API of multiprocessing but is no more than a wrapper around the threading module." however dummy's Pool method does not replicate the API of multiprocessing's Pool method:

>>> import inspect
>>> import multiprocessing
>>> inspect.getargspec(multiprocessing.Pool)
ArgSpec(args=['processes', 'initializer', 'initargs', 'maxtasksperchild'], varargs=None, keywords=None, defaults=(None, None, (), None))
>>> import multiprocessing.dummy
>>> inspect.getargspec(multiprocessing.dummy.Pool)
ArgSpec(args=['processes', 'initializer', 'initargs'], varargs=None, keywords=None, defaults=(None, None, ()))

Thus when attempting to downshift from multiprocessing to threading like so...

import multiprocessing.dummy as multiprocessing

...code that supplies the maxtasksperchild argument to Pool() will not run.