dict = {'a': 1, 'b': 2, 'c': 3}
print({value:key for key, value in dict.items()})
# Prints: {1: 'a', 2: 'b', 3: 'c'}

http://diveintopython3.org/comprehensions.html#stupiddicttricks

Based on the example by [Mark Pilgrim](http://diveintopython3.org/about.html).

Swapping keys and values of a dictionary

Python