Webserver module for python?

I'm currently coding some minor tools in python for which I'd like to have a more or less minimalistic web interface. Are there any simple and lightweight modules providing a http web server (or even web interfaces)? I don't really want to code this stuff myself, as these tools are just for little computer and file management purposes; the need to write a web server by my own would indeed outweigh the benefits from having a web interface under these circumstances.

You seem to misunderstand me somewhat--I don't want to run a python program on a web server, I want to develop a web interface for a python program that's run locally on the computer.
I could write the http request handler and server myself, but this would be quite tedious, so I thought there might be a pre-built solution.
SimpleHTTPServer is, well, a bit too simple, since it only serves files already in directories; I'd like to have a server which just outputs a web page that is given to it via a string (or a dictionary containing strings as the values; the keys would be the page names) and reports back the values it received via HTTP_GET or HTTP_POST (ideally in a dictionary with the keys being the variable names and values being, well, the values)

Is there something like that or do I really have to code it myself?