[Zope] Retrieving the week number with DateTime

Hello, i want to retrieve the number of the week from a DateTime object. Is there any way to do this? I've looked through DateTime.py but i couldnt find anything usefull, is there some algorithm to get this? thanks in advance, -- Arjan Scherpenisse acscherp@wins.uva.nl may the source be with you === http://www.gnu.org ===