Validating web URLs in a database file

[RandyKreuziger]

We have high quality PDF maps for most of our Wildlife Areas.  The feature class we put out in our web applications contains a field with a hyper link to these PDFs.  Not all Wildlife Areas have a PDF map but I'd like to programmatically populate the field and then NULL out the field if there is no PDF map at that web location.  Does anyone know how to test the validity of a web URL in Python?   Thanks

[KevinHibma]

Im sure there are better ways to do this, but heres a quick and dirty way:

import urllib2
try:
  urllib2.urlopen('http://hsfdsda.com')
except:
  print "didnt work"