These are example python programs for working with GPIO on the Raspberry Pi released after December 2012 (Version 2).
This is for the Raspberry Pi class that I teach.
If you want the presentation that goes along with this, please feel free to email me and I can send along what I've been using to teach the classes.
The "CatFeeder" has been forked into it's own project here: https://github.com/videoman/RPICatFeeder
-David Bryan
dave at drstrangelove dot net