Good thread pool module

[Steve M]

I believe "Python in a Nutshell" has a couple of clear examples using
Queue and Threading, including one with a pool of worker threads that
wait for entries in one queue and place results in another.

Also you should look at the Python Cookbook, which probably includes
the same or similar examples from the Nutshell book, since the author
of that is an editor of Cookbook.

http://aspn.activestate.com/ASPN/Cookbook/Python?kwd=Threads