shuffle

Python's random.shuffle(list) randomly re-orders a list (in place).

>>> letters = ['a', 'b', 'c', 'd', 'e', 'f']
>>> letters
['a', 'b', 'c', 'd', 'e', 'f']
>>> random.shuffle(letters)
>>> letters
['f', 'e', 'd', 'c', 'b', 'a']
>>> random.shuffle(letters)
>>> letters
['c', 'b', 'a', 'd', 'e', 'f']