[Zope] Zope Page Template id in python script?

[altkey]

Hi,

I have a breadcrumbs python filesystem script. It's a long script that 
constructs dictionaries and places them in a list for a master_template 
to display. The dictionaries look like this

     relative = context.portal_url.getRelativeContentPath(context)
     obj = portal.restrictedTraverse(relative)
     .... code for various things ...
         ordinaryUrl = portal_url + '/' + join (relative, '/')
         ordinaryId  = relative[-1]
         ordinaryD   = { 'id'    : ordinaryId
                       , 'title' : obj.title_or_id()
                       , 'url'   : ordinaryUrl}

In some cases I need to get an id for a zope page template instead of 
for 'context'. Can anybody tell me how to do that, or better yet tell me 
where the way to do it is documented? I haven't had much luck searching 
the source code for something that'll help.

[PS: context for the script never seems to include the page template,
I understand why but I still want to know which page template is in use
when the script is run.]

cheers,
Phil