[Zope] calling SQL methods from Scripts(Python)

I thought they would behave as a variation on methods, but they don't seem to find the keyword parameters. For example, I have a query on a single key request = container.REQUEST RESPONSE = request.RESPONSE container.PhotoUpdate(context,request, user_id='STUD00001' ) return 0 where PhotoUpdate is a simple SQL query object. I thought the call would be the same as for a DTML-method, but I suspect now I am wrong. What's the correct form.