>>> from difflib import HtmlDiff
>>> import string
>>> a = "These are words."
>>> b = "These are worlds."
>>> c = difflib.HtmlDiff
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
NameError: name 'difflib' is not defined
>>> c = HtmlDiff
>>> c.make_table(a, b)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: unbound method make_table() must be called with HtmlDiff instance as first argument (got str instance instead)
>>>