[Zope] easier way to get this() from DTML Document?

In order to get the real context when I call a Python Script from a DTML Document, I've found that I need to do something besides just looking at the context (because it's the container of the DTML Document). For now, I'm explicitly passing this() <dtml-var "standard_html_footer(this=this())"> and then I test if it's set in my Python Script. If it is, I use it. Otherwise I use the context. Is there a way around this? I don't want users to have to put in the "this=this()" junk. Can I somehow pry open the '_' TemplateDict enough to get the same info? Thank you. --kyler