Wish they made the source code downloadable... It would be helpful for students who want to step through the code and actually see what is going on. <a href="http://algowiki.com" rel="nofollow">http://algowiki.com</a> offers some code, but it isn't all necessarily in Python.
<a href="http://shootout.alioth.debian.org/" rel="nofollow">http://shootout.alioth.debian.org/</a> has implementation of algorithms in all programming languages.