How to Find all Combinations of a list in Python

John on April 27, 2021

In this tutorial, we will learn how to create a list of tuples containing every possible combination from another list in Python.

To find all the possible combinations for a list in Python, loop through the list and use the itertools.combinations() function.

import itertools

items = [1,2,3,4]

combinations = []

for r in range(len(items) + 1):
   
   combinations_obj = itertools.combinations(items, r)
   combinations_list = list(combinations_obj)
   combinations += combinations_list

print(combinations)

[(), (1,), (2,), (3,), (4,), (1, 2), (1, 3), (1, 4), (2, 3), (2, 4), (3, 4), (1, 2, 3), (1, 2, 4), (1, 3, 4), (2, 3, 4), (1, 2, 3, 4)]