[Zope] "dtml-in" question

Hi, A little question about the "dtml-in" tag. What I'd like to do is to build a list according to a property value, like we can do with for "for" Python instruction, something like : <dtml-in "object for object in objectValues() if object.visible"> Is there any way to achieve this, without writing a custom method ?? Thanks, Thierry -- Linux every day, keeps Dr Watson away... http://gpc.sourceforge.net -- http://www.ulthar.net