Atttribute error

[HMS Surprise]

The snippet below causes an attribute error.

AttributeError: module 'urllib' has no attribute 'urlopen'

I am using python 2.2.3. According to the documentation at C:
\Python22\Doc\lib urllib has a function called urlopen.

#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
import urllib

class login(CompactTest):
    # Recorded test actions.
    def runTest(self):
        f = urllib.urlopen("http://www.python.org/")
        f.read()