Python has a great community and Github makes it super easy to contribute.

Step 1: Create a github account Step 2: Look at other projects you find interesting, clone them and try them out. If you have a hard time installing it or using it, improve something about it and submit a pull request. Even if it is just improving the README. Step 3: Repeat.

You can always tear apart my projects and improve them if you are interested. http://github.com/mcotton