utdiscant utdiscant - 6 months ago 45
Python Question

Shuffling a list of objects in python

I have a list of objects in python and I want to shuffle them. I thought I could use the

random.shuffle
method, but this seems to fail when the list is of objects. Is there a method for shuffling object or another way around this?

import random

class a:
foo = "bar"

a1 = a()
a2 = a()
b = [a1,a2]

print random.shuffle(b)


This will fail

Answer

random.shuffle should work. Here's an example, where the objects are lists:

from random import shuffle
x = [[i] for i in range(10)]
shuffle(x)

# print x  gives  [[9], [2], [7], [0], [4], [5], [3], [1], [8], [6]]
# of course your results will vary

Note that shuffle works in place, and returns None.

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