Check if URL exists via Python

checkUrlExists.m1.py

from urllib2 import urlopen
code = urlopen("http://example.com/").code
if (code / 100 >= 4):
   print "Nothing there."
# via http://stackoverflow.com/questions/1966086/how-can-i-determine-if-anything-at-the-given-url-does-exist

checkUrlExists.m2.py

import urllib2
ret = urllib2.urlopen('http://hostname/directory/file.jpg')
if ret.code == 200:
    print "Exists!"
# via http://stackoverflow.com/questions/7347888/how-do-i-check-if-a-file-on-http-exists-using-python-django