[Zope] reading values from radio buttons (python script)

I have made a form with various quetions . The answers are given by radio buttons and check boxes. When the user submit the form it is send to my e-mail by zope mailhost. How can I get the radio and checkbox values ? I only know to get values from text boxes... my code for the form is <form action="mailAction.py" method="POST"> , I use ZPT for the form and python script to get the values and send the mail.