What are some good, free resources to learn Python?

CS50, Harvard’s free computer science program, is launching a new course this week focused on Python, CS50P. This course is unique in that if you start this week you can actually view the lectures live. You can also view them recorded same as their regular CS50 course. BTW you can choose to pay a nominal fee in order to receive a free certificate o upon completion. If you want to do it, now is the time!