Finding a public facing IP address in Python?

Question

How can I find the public facing IP for my net work in Python?

Answer 1

This is simple as

>>> import urllib
>>> urllib.urlopen('http://icanhazip.com/').read().strip('\n')
'xx.xx.xx.xx'

Answer 2

whatismyip.org is better... it just tosses back the ip as plaintext with no extraneous crap.

import urllib
ip = urllib.urlopen('http://whatismyip.org').read()

But yeah, it's impossible to do it easily without relying on something outside the network itself.