wxPython is a Python extension library for developing cross platform GUI. Website: http://www.wxpython.org/
This repostiory includes a variety of examples for developing GUI with wxPython.
Kudos to Noel Rappin, an author of WxPython in Action. If you like the book and its example codes, I encourage you to buy the book at [amazon] (http://www.amazon.com/Wxpython-Action-Noel-Rappin/dp/1932394621)