is-ip-in-cidr.py

#!/usr/bin/env python

from ipaddress import ip_network, ip_address
import sys

cidrs = []


with open(sys.argv[1], "r") as f:
    for line in f:
        cidrs.append(line.strip())

for cidr in cidrs:
    net = ip_network(cidr)

    print(f"ip address {sys.argv[2]} in {net}: ", end="")
    print(ip_address(sys.argv[2]) in net)