Here's my script on running a python script right from your NodeJS application without spinning an express server!

MyPythonScript.py

# This script will create a file with the name and extenstion provided in the parameters.
# Not very useful but the simplest example I could think of

import os, sys
path = os.getcwd()+"\\custom_path\\"+sys.argv[1] # I needed a custom path, you can omit that part. You still need the absolute path.
open(path,'w+') #Works like a native charm!
print("Done") #You will get this in the STDOUT on your Node console.

RunningPythonViaNodeJS.js

//The python file can be as simple as Hello World or as complicated as a facial recognition script (Which is what I made this for).

const {spawn} = require('child_process');
var file = process.cwd()+"\\appended_path\\MyPythonScript.py" //You need the absolute path.
const childPython = spawn('python', [`${file}`, 'param1']) 
//When the script runs successfully
childPython.stdout.on('data', (data) =>{
    console.log(`STDOUT: ${data}`);
});
//When the script runs into an error
childPython.stderr.on('data', (data) =>{
    console.log(`STDERR: ${data}`);
});
//When the script exits
childPython.on('close', (code) =>{
    console.log(`Exit Code: ${code}`); //0 is good this time. :)
});