This is an external method I wrote to make it easier to iterate over the records returned from searching the catalog. However if I have yield record,item instead of yield item it says that I am not allowed to access a particular tuple during iteration. How can I make it so that the value that it yields is something that a python script object can iterate over? I have also tried doing yield tuple((record,item)) yield list(record,item) and they give the same problem. How I use the script is pretty much for record, doc in catalogIter(context.Catalog(searchterms)): print record print doc Of course what is inside is different from that but it will cause the same problem since the issue happens in the iteration not inside the for loop. import zExceptions def catalogIter(records): "iterate over a catalog safely" for record in records: try: item = record.getObject() if item is not None: yield item except (zExceptions.Unauthorized, zExceptions.NotFound, KeyError, AttributeError): pass