http://www.diveintopython3.net/ - the updated classic
http://www.tutorialspoint.com/python/
MIT has a course in it's OpenCourseWare site called [http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-189-a-gentle-introduction-to-programming-using-python-january-iap-2011 introduction to programming using Python]