python获取本机外网ip的方法

import urllib
import re
print "we will try to open this url, in order to get IP Address"
url = "http://checkip.dyndns.org"
print url
request = urllib.urlopen(url).read()
theIP = re.findall(r"\d{1,3}\.\d{1,3}\.\d{1,3}.\d{1,3}",request)
print "your IP Address is: ", theIP