What's the difference between () vs [] vs {}?

Question

What\'s the difference between () vs [] vs {} in Python?
They\'re collections? How can I tell when to use which?

Answer 1

In addition to the tuple, list and dict given by the other answers, {} also denotes a set literal in python 2.7 and python 3.1. (This makes sense because set elements act like the keys of a dict).