Building a back-end Android app?

Question

Python

Good afternoon. There is a small neural network that can recognize handwritten numbers, written in Python. The input data is a 28/28 pixel image. There is also a simple android application in which you can draw these numbers. I would like the neural network code to be located on the server, and the android application would simply send an array of input values ​​\u200b\u200bto there, and receive as a response the result of the network, that is, an array of output values. The question is how to establish such interaction. That is, I need to create an API server that will receive a request from the client, pass it through the neural network, and send a response back to the client. I started digging towards Django + Tastypie, but it's still not very clear how to apply it. Advise what to read, or in which direction to move at all.