First let me say that I really like Nevow template system.
Once you became expert with it, it proves to be really flexible.
The problem is the performance.
I have done a simple test with the rendering of a table 5 * 20, Nevow
against Django, and Nevow is much slower.
The problem is that, I think, there are a lot of objects adaptation.
Is it possible to use that same model used by django.template?
You pass a context (that is a dictionary usable like a stack: push/pop)
to the render function.
All the data directive will search the data in the context (like djando,
first dictionary lookup, then attribute lookup, and so).
As an example n:data='x.y' ==> ctx['x']['y'].
A rend.Page.renderHTTP can build a context from the instance dictionary.
Thanks and regards Manlio Perillo