Open source projects
A great way to reinforce your knowledge and make the world a better place at the same time is to contribute to some Open source projects.
Once you have mastered the Python-foo, you could make yourself useful and contribute.
The Firefox and Chromium community are also a very friendly bunch.
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Code Firefox Atm only Windows tutorials are available from this site, so you should check back every now and then, for now, use this. Linux and OsX tutorial