File Handling in Python

solution.py

import bisect

with open('ip1.txt', 'r') as f1:
    list1 = [line.rstrip('\n') for line in f1.readlines()]
with open('ip2.txt', 'r') as f2:
    list2 = [line.rstrip('\n') for line in f2.readlines()]

list2.sort()
same_ip = []
for i in list1:
    position = bisect.bisect_left(list2, i)
    if position < len(list2) and list2[position] == i:
        same_ip.append(i)
same_ip = list(set(same_ip))
print(same_ip)