What's the difference between __iter__ and __getitem__?

Question

This happens in Python 2.7.6 and 3.3.3 for me. When I define a class like this

class foo:
    def __getitem__(self, *args):
        print(*args)

Answer 1

__iter__ is the preferred way to iterate through an iterable object. If it is not defined the interpreter will try to simulate its behavior using __getitem__. Take a look here