python script to quickly geolocate ip addresses en masse with libgeoip ( cat ips.txt | python ip2geo.py )

ip2geo.py

import os, GeoIP, fileinput

geo = GeoIP.new(GeoIP.GEOIP_MEMORY_CACHE)

for line in fileinput.input():
  try:
    print(geo.country_code_by_addr(line.strip()))
  except IOError:
    break