How to communicate with Python from JS?

Question

Python

I'm writing a React Native app and I need to call a python script and pass data to it for processing.
My questions are:
1. How to make a call to a python script or make an API locally?
2. How to transfer data from React Native to Python (for example pdf or txt)?
It is very important that it is not a client-server, but locally on the user's device.
Well, that's basically it. I will be very grateful for advice.