Standard ways to get union, intersection, difference of lists?

[John Hunter]

>>>>> "Steve" == Steve Holden <sholden at holdenweb.com> writes:

    Steve> Not necessarily: I believe you can just pick up the sets
    Steve> module from CVS and run it under 2.2+.

I just tried import sets from the 2.3b1 distribution under python 2.2,
but it failed with an ImportError trying to load itertools.  I believe
itertools is a C module, so perhaps it is not so straightforward to
use sets from 2.2?

John Hunter