check-blocked-ip.py

#!/usr/bin/env python3

import csv
import codecs
import urllib.request
import argparse
import ipaddress


def iter_blocked_subnets():
    url = "https://raw.githubusercontent.com/zapret-info/z-i/master/dump.csv"
    response = urllib.request.urlopen(url)
    reader = csv.reader(codecs.iterdecode(response, 'cp1251'), delimiter=';')

    for row in reader:
        for ip in row[0].split(u' | '):
            try:
                yield ipaddress.ip_network(ip.strip())
            except (ipaddress.AddressValueError, ValueError):
                pass


def main():
    parser = argparse.ArgumentParser()
    parser.add_argument("ip")
    args = parser.parse_args()

    ip = ipaddress.ip_address(args.ip)
    for network in iter_blocked_subnets():
        if ip in network:
            print("YES. %s" % network)
            return
    print("NO")

if __name__ == '__main__':
    main()