Python List Shuffle

You can shuffle Python list by importing random and using shuffle.

import random

a = [1, 2, 3]

random.shuffle(a)

print(a)  # [2, 1, 3]

shuffle() updates the original list and returns None.

import random

a = [1, 2, 3]

b = random.shuffle(a)

print(b)  # None

Random seed

You can set the seed by random.seed() globally.

import random

random.seed(7)

a = [1, 2, 3]

random.shuffle(a)

print(a)  # [3, 1, 2]

The sorted list is always same whenever running the program. If you don't set the seed, the result changes every running.