How to getId() of pt from a Script (Python)

I have a Page Template in a folder: folder1/mypage.pt
containing:
  <span tal:replace="here/myscript">Testing</span>

myscript is a Script (Python) containing:
  print context.getId()
  return printed

Now, when folder1/mypage.pt is called TTW, it displays "folder1" as the 
context.getId(), but I was expecting (and hoping) it would display 
"mypage.pt"...  Isn't it being called within the "context" of mypage.pt 
?

How do I get the Script (Python) to fetch the id of the Page Template 
it was called from?

(Zope 2.8.1)

Cheers,
Chris

-- 
http://chrismiles.info/