Interactive web application with python

I am trying to make a web application that can run biochemical simulations, and I want to display an interactive animation of the simulation while it is running. However, the actual simulator is already made in python, and I'm worried that constantly making HTTP requests to the server for simulation results will be way too slow. Is there a way that I can have the simulation run on the client side, or access the python simulator quickly without reloading the page?