Hi, I need to understand the rules in passing variables between dtml and python. All I am doing at this point is converting an integer to a string. In this format when I test it I get the results I was looking for. Bound Names context, container, script, traverse_subpath # Example code: # Import a standard function, and get the HTML request and response objects. from Products.PythonScripts.standard import html_quote request = container.REQUEST RESPONSE = request.RESPONSE y='0'+str(x) return y But I'm lost on the passing. <dtml-call "int_to_string(num)"> **<dtml-var y>** Any pointer would be a great help, thanks. Larry McDonnell Proton Energy Systems 50 Inwood Rd. Rocky Hill, CT 06067 (860) 571-6533 ext. 531 Email:lmcdonnell@protonenergy.com www.protonenergy.com