Text-to-HTML processing program

[Jeff Schwab]

phil hunt wrote:
> Does anyone know of a text-to-HTML processing program, ideally
> written in Python because I'll probably be wanting to make small
> modifications to it, which is simple and straightforward to use
> and which uses a simple markup language (something like Wikipedia
> markup would be ideal)?

How about troff?  Or if you really want to keep it simple, why not use 
the <pre> tag in HTML?