import urllib, urllister
usock = urllib.urlopen("http://diveintopython.net/")
parser = urllister.URLLister()
parser.feed(usock.read())
usock.close()
parser.close()
for url in parser.urls: print(url)

Traceback (most recent call last):
  File "demo.py", line 1, in <module>
    import urllib, urllister
ImportError: No module named urllister