what does random.shuffle do in python code example

Example: randomly shuffle array python

import random
l = list(range(5))
print(l)
# [0, 1, 2, 3, 4]

lr = random.sample(l, len(l))
print(lr)
# [3, 2, 4, 1, 0]

print(l)
# [0, 1, 2, 3, 4]