After reading Joachim Schmitz <js@ac-copy.net> post "extensive Looping in DTML considered harmful", I have a few questions about how this relates to my Product. I've also been stumped on how to do this in a few situations now. In my python product, I have three base classes: promoter, event, and person Inside of the promoter class there is a list variable called promoterdjs. Inside of the person class there is a string varialbe called djname. In my dtml, I have a page which displays the promoter, and checks to see if any of the djnames match with the items in promoterdj. If they match, I want to hyperlink them to the id of that dj. The code I have been hacking at looks like this: <dtml-if promotiondjs><strong><font size="+1"><dtml-var promotionname></font> DJs:</strong><BR> <dtml-with "PARENTS[0]"> <dtml-in promotiondjs><dtml-let thisdj=sequence-item> <dtml-in personValues> <dtml-if "meta_type == 'SRPersonPost'"> <dtml-if "_.str(thisdj) == _.str(djname)"> <A href="<dtml-var site_url>/<dtml-var id>"><dtml-var thisdj></a><br> <dtml-else><dtml-var thisdj><BR> </dtml-if> </dtml-if> </dtml-in> </dtml-let> </dtml-in> </dtml-with> <dtml-else> This promoter has no dj's associcated with it. </dtml-if promotiondjs> NOTE! this produces this output with two dj's that match: dj1 dj1 # with anchor dj2 # with snchor dj2 dj3 dj3 My question is: How would this be achieved in python, and what is the proper way to do it in DTML? Would the python look something like: def compareDJs(self,promoterdjs): ## untested ## """ return the input list as a tuple, with ids attached if none are found return the tuple with '0' """ persidlist = map(None,self.ids) for i in len(promoterdjs): personidlist = persidlist personidlist = filter(lambda x,p=self : p.data[x].meta_type == 'SRPersonPost', personidlist) personidlist = filter(lambda x,p=self : p.data[x].promotername == promoterdj[i], personidlist) personids.append(personidlist) return map(None, promoterdjs, personids) Thanks for any input! -ed-