__init__.py

import logging
import multiprocessing

def _get_logger():
    logger = multiprocessing.get_logger()
    logger.setLevel(logging.INFO)
    handler = logging.StreamHandler()
    handler.setLevel(logging.INFO)
    formatter = logging.Formatter('[%(levelname)s/%(processName)s] %(message)s')
    handler.setFormatter(formatter)
    logger.addHandler(handler)
    return logger

logger = _get_logger()

def double(x):
    value = x * 2
    logger.info("%i doubled is %i" % (x, value))
    return value

def main():
    p = multiprocessing.Pool(4)
    p.map(double, xrange(0, 200))

if __name__ == "__main__":
    main()

mp

#!/usr/bin/env python

import mp
import multiprocessing

if __name__ == "__main__":
    multiprocessing.freeze_support()
    mp.main()

setup.py

#!/usr/bin/env python

from distutils.core import setup

setup(name="mp",
      version="1.0",
      description="Testing multiprocessing on windows",
      packages=["mp"],
     )