Need help with designing a web interface connected to a python code

Hey there! I need help to deign a simple web interface that accepts input data from the user (one line text data or a txt file containing a list of data points) and outputs (or generate an output file) which contains a few numbers that are the results from a python code that I have developed previously. I essentially need a very basic interface that runs on a server. I also need help on loading and running the website on a server.

A simple example is https://www.bioinformatics.org/sms/rev_comp.html assuming that the function that reverses the sequence is a python code running on a server. Note that the final product might be more elaborate than this.

Must be available to start immediately. Working knowledge of Python Django is a major plus.

Send brief note on your experience, pricing and availability