Support for Maxmind's IP Geolocation (v2) CSVs.

GeoIP.geolocate(IPv4) will load data from the CSV if it's not already loaded.

a = ip"1.2.3.4"
geolocate(a)        # returns dictionary with all relevant information

This product includes GeoLite2 data created by MaxMind, available from https://www.maxmind.com.