I am trying to do the following: <dtml-let x:int="REQUEST.get('prod_config')" item="_[REQUEST.get('prod_id')]" price="item.price_list[x]"> <INPUT type="hidden" name="chargetotal" value="<dtml-var price>"> </dtml-let> The prod_config variable is a number (returned as a string) from a SELECT list. The prod_id variable is the id of an object in the same folder as this method that has a price_list attribute. price_list is a list of strings representing prices. This results in a "Name Error" where Zope cannot find "x". If I change line 3 to this: price="item.price_list['x']"> it fixes the Name Error, but then I get a "Sequence Index must be an integer" error on price_list['x']. I would have thought the use of "x:int" in my <dtml-let> would take care of this issue. Seems I can't win! Does anyone know the correct way to do this lookup? Best Regards, Brian Holdsworth