[Zope] form action with python script

Hi, I'm working with a Python Script in Zope but I'm having some problems. I'm trying to call a python script in a "form action" because I have to make some calculations with some values of this form. I call like this: <form name="form1" action="a_python_script"> but normally a form action calls another page. So, the question is: I'd like to call a python script and, in this script, make a redirect to another page(url). Can I do that?? I hope you can help me :) Sorry if I'm not being clear! Sabrina Araujo.