This would have been really useful when I was learning Python on Udacity and was confused by the behavior of = and += on lists and tuples. This should definite

This would have been really useful when I was learning Python on Udacity and was confused by the behavior of = and += on lists and tuples. This should definitely be integrated into Udacity and other learning platforms! Most instructors have to do this by hand in CS 101 lectures anyways.