It's a reprint of an article (as noted in the header) from Python magazine. If you want to know about the GIL, it's near the end. The article is aimed at dissem

It's a reprint of an article (as noted in the header) from Python magazine. If you want to know about the GIL, it's near the end. The article is aimed at disseminating a large amount of information about threading in general and specifically python's implementation.