http://www.python.org/
http://www.tutorialspoint.com/python/index.htm
http://docs.python.org/2/tutorial/datastructures.html
https://developers.google.com/edu/python/?hl=it
http://www.python.it/doc/ (in Italian language)
http://docs.python.it/html/tut/tut.html (in Italian language)
http://www.sthurlow.com/python/
http://www.learnpython.org/
https://www.youtube.com/watch?v=_iX9CSX09Z8 (in Italian language)
http://www.tutorialspoint.com/python/python_decision_making.htm