["python","list"]
How to zip two differently sized lists, repeating the shorter list?

I want to zip two list with different length for example A = [1,2,3,4,5,6,7,8,9] B = ["A","B","C"] and I expect this [(1, 'A'), (2, 'B'), (3, 'C'), (4, 'A'), (5, 'B'), (6, 'C'), (7, 'A'), (8, 'B'), (9, 'C')] But the built-in zip won't repeat to pair with the list with larger size. Does there exist any built-in way can achieve this? Here is my code: idx = 0 zip_list = [] for value in larger: zip_list.append((value,smaller[idx])) idx += 1 if idx == len(smaller): idx = 0
You can use itertools.cycle: Make an iterator returning elements from the iterable and saving a copy of each. When the iterable is exhausted, return elements from the saved copy. Repeats indefinitely. Example: A = [1,2,3,4,5,6,7,8,9] B = ["A","B","C"] from itertools import cycle zip_list = zip(A, cycle(B)) if len(A) > len(B) else zip(cycle(A), B)