blocks.py

import csv
import time

from ipwhois import IPWhois

output = csv.DictWriter(open("blocks.csv", "w"), ["ip", "affected", "name", "country", "description"])
output.writeheader()

for line in open("blocks.txt"):
    line = line.strip()
    row = {"ip": line}

    parts = line.split("/")
    if len(parts) == 1:
        ip = parts[0]
        row["affected"] = 1
    else:
        ip, cidr = parts
        cidr = int(cidr)
        row["affected"] = 2 ** (32 - cidr)

    addr = IPWhois(ip)
    result = addr.lookup_rdap(depth=1)

    if result is None or 'network' not in result:
        output.writerow(row)
        continue

    row["name"] = result["network"]["name"]
    row["country"] = result["network"]["country"]

    if result['network']['remarks'] and len(result['network']['remarks']) > 0:
        row["description"] = result['network']['remarks'][0]['description'].replace("\n", " ")

    output.writerow(row)
    time.sleep(2)