"""Check difference between lists""" inside = [] not_inside = [] not_outside = [] with open('inside.txt', 'r') as file: for line in file: inside.append(line.replace('\n', '')) with open('outside.txt', 'r') as file: for line in file: line = line.replace('\n', '') if line in inside: not_outside.append(line) else: not_inside.append(line) print("Not inside:") for player in not_inside: print(player) print("\nNot outside:") for player in not_outside: print(player)