import json
import urllib3

http = urllib3.PoolManager()

def get_external_ip():
  request = http.request('GET', 'http://ip.jsontest.com')

  assert request.status < 300, "Could not retrieve external IP address"

  result = json.loads(request.data)
  ip = result["ip"]

  return ip

def main():
  ip = get_external_ip()
  print("Your external IP address is {}".format(ip))

if __name__ == "__main__":
    main()
