http://en.wikibooks.org/wiki/Python_Programming/

http://mirnazim.org/writings/python-ecosystem-introduction/

http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-00sc-introduction-to-computer-science-and-programming-spring-2011/

[ List of open books on python ]
http://pythonbooks.revolunet.com/