Python Program to Iterate Through Two Lists in Parallel

 

Example 1: Using zip (Python 3+)

list_1 = [1, 2, 3, 4]

list_2 = ['a', 'b', 'c']

for i, j in zip(list_1, list_2):

    print(i, j)

Example 2: Using itertools (Python 2+)

import itertools

list_1 = [1, 2, 3, 4]

list_2 = ['a', 'b', 'c']

# loop until the short loop stops

for i,j in zip(list_1,list_2):

    print(i,j)

print("\n")

# loop until the longer list stops

for i,j in itertools.zip_longest(list_1,list_2):

    print(i,j)