Creating a simple python web application

I have a python script that takes inputs from commandline. I simply want to modify this script so I can run it on web. I want the commandline interface to be replaced by a simple boxes in a web page, and once the script is executed, I want the results to be shown on a webpage like it does in commandline.

Any help on where to start, which python packages to use and which steps to take would be much appreciated.

Until now, I read a little about webapp2 for Google App Engine and web.py. I do not want to use Django.

Thank you!