How to efficiently compare two unordered lists (not sets) in Python?

Question

a = [1, 2, 3, 1, 2, 3]
b = [3, 2, 1, 3, 2, 1]

a & b should be considered equal, because they have exactly the same elements, only in different

Answer 1

Using the unittest module gives you a clean and standard approach.

import unittest

test_object = unittest.TestCase()
test_object.assertCountEqual(a, b)