tvl-depot/users/wpcarro/scratch/facebook/shuffle.py

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from random import randint
def get_random(i, j):
return randint(i, j)
def shuffle(xs):
for i in range(len(xs)):
j = get_random(i, len(xs) - 1)
xs[i], xs[j] = xs[j], xs[i]
xs = list(range(1, 53))
print(xs)
assert len(set(xs)) == 52
shuffle(xs)
assert len(set(xs)) == 52
print(xs)
print("Success!")