converts a list of cidrs stored in cidrs.txt into an ip list in ips.txt

cidrs_to_ips.py

import ipaddress


if __name__ == "__main__":
    with open("cidrs.txt", "r") as infile:
        cidrs = [l.strip() for l in infile.readlines() if l]
        ips = [ip for cidr in cidrs for ip in list(
            map(str, ipaddress.ip_network(cidr, strict=False)))]

    with open("ips.txt", "w") as outfile:
        outfile.write("\n".join(ips))