How to make python script server side

Question

I'm trying to make my raspberry PI host a website for control of a system on my house but can't run server side Python

I've tried this in Javascript:

import { exec } from 'child_process';
exec("sudo python /home/pi/Light.py");

It's supposed to run Light.py server side because it contains GPIO instructions for the pi but the PI just sits there doing nothing

• Sergey Kirienko: Can this answer help you? stackoverflow.com/questions/23450534/…

Answer 1

Javascript's exec() is not for running anything server side, Python or otherwise.

Probably the easiest way to achieve what you're looking for would be to use a simple Python web framework, such as Flask. You could expose a simple HTTP endpoint doing whatever you need doing, and hit that from Javascript.

• brunns: How and where is this Javascript being run? child_process looks like a node thing, which would also run server side. How's it being triggered? What happens if you SSH onto your Pi and run sudo python /home/pi/Light.py?
• Nathan Johnson: It simply flickers a light for now on testing
• brunns: Sorry, I need to be more specific. This Javascript code - where does it run, on your Pi, or on a client machine? How is it triggered? (What it does is unimportant from the point of view of solving your problem.)
• brunns: And what happens if you SSH onto your Pi and run sudo python /home/pi/Light.py?