The article Python Multiprocessing For Beginners goes through how to use multiprocessing in Python. As the article says:

This article is going to teach you, How to apply python multiprocessing for your long-running functions

I'll need to go through it at some point, as it looks like it could be useful to know.

At the end of the article, the author says

This is an old method of doing python multiprocessing but this is solid. In the next articles, I will teach you the latest way of python multiprocessing and also how to get the function’s return data from a multiprocessing process

Don't know if there is the next article out yet, but it should be interesting.