I've scoured the web for some decent tutorials for Pygame, one of the best game engines for Python out there. Here's what I've found, ordered by (in my opinion) quality.
Source code: gorillas.py
An entire generation of people remember the Gorilla.BAS game that came with Qbasic, where gorillas on top of buildings threw exploding bananas at each other. This is a Python remake of that game using the Pygame game engine, and is fairly heavily commented so you can explore the source.
I'm currently doing a very slow and thorough read through of the book to weed out the last of the typos, errors, and ambiguous statements in the book.
I've received a proof copy of the book from CreateSpace.com a few weeks ago...
Version 9 of the PDF is available, which includes several typo corrections and a completed table of contents.
From 2008 to 2009, I wrote a book called “Invent Your Own Computer Games with Python” ( http://inventwithpython.com ) which guides young adults and complete beginners through learning how to program in the Python language. I’ve just completed the second edition of the book, which has been an exhausting amount of work. Looking back over it, I realized that it could have been a much less exhausting experience if I had made some simple preparations.
Here's all the new stuff that went into the second edition of "Invent Your Own Computer Games with Python".