Here is a few useful links to Python tips:
A list of hidden Python features:
http://stackoverflow.com/questions/101268/hidden-features-of-python
Skulpt let you run Python within browser:
A nice online tool to let you visualize Python code exacution:
http://www.pythontutor.com/visualize.html
A quick reference guide to Python double-underscore class methods:
http://www.siafoo.net/article/57