How To Build a Template Engine

I'll be building this in Google App Engine and I'll be Building it using Python.

What I'd like to do is have a template that holds each section. With the sections probably being header, sidebar, content and footer.

The way I would build it is so that I can call page.header(arg) and it will load the header that the arg specifies开发者_如何学Python.

I know there are a lot of frameworks, but I want to try and build a website based on the MVC idea my self. I figure it will probably take 6 months or more to build, but at least I'll learn something along the way.

What else do I need to think about building a template engine?

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I would check out Webpy sources;
webpy templating uses a syntax similar to yours, calling the views with something like:

name = 'Bob'    
return render.index(name)

where index is the templating file to render.

Have a look to templating.py specifically.