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

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Python2.7

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:

[code]

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)
[/code]
And my configure.zcml looks like this :
[code]
<plone:portlet xmlns:plone="#unknown">
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"
/>
[/code]


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:

[code]

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

[/code]

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