How to render a template page by calling its method from TAL portlet(@@manage-portlet

[nirmala]

I want to know that how to call a method which is in file system (createPictMenu.py in my case) from TAL Portlet(from zmi) which is in @@manage-portlets(in the Add Portlet drop down list).
I did like this

1.Created one new class for the address(tal portlet) in my createPictMenu.py
2.I then registered the portlet in configure.zcml.

Here is my code bit:

 
      class address_tal(BrowserView)
 
         def myaddress()
             address_bar = ViewTemplatePageFile('templates/address_left.pt')--> (this 
             is  the template page which i want in my newly created address portlet manage-     
             portlets)
 

And my configure.zcml looks like this :

         <plone:portlet
         name="collective.portlet.tal.TALPortlet"
         interface="collective.portlet.tal.talportlet.ITALPortlet"
         assignment="collective.portlet.tal.talportlet.Assignment"
         view_permission="zope2.View"
         edit_permission="cmf.ManagePortal"
         renderer=".browser.createPictMenu.address_tal"
         addview="collective.portlet.tal.talportlet.AddForm"
         editview="collective.portlet.tal.talportlet.EditForm"
         />
 

And in Zmi:

In zmi i did the following things localhost:8080/myproject/@@manage-portlets --> AddPortlet(dropdown list)--> selected TAL Portlet option-> Then i gave title as address and for description i given the code to call the address_tal from createPictMenu.py.

address_tal:

        <span tal:define="global li python:view.myaddress()">
               <span tal:replace="structure python:li" /> 
        </span> 
 

i dont know how to call a method of a file which is in file system from zmi @@manage-portlets->TAL portlet. Please help