[Zope] objects as values in a python dictionary

This concerns both Python Script and External Methods. I haven't tried it with DTML (if possible). A dictionary can use objects as values I think. res={} res[string] = "A wicked module I use often" res[context] = "This is where you were :)" That works, but it doesn't work when I loop over objectValues for object in folderobject.objectValues(): res[object] = "yeah" The error message is AttributeError and __hash__ something. What have I missed? Peter