nodejs execFile python script reads the parameter and sends it back through the stdout

node_calls_python.js

const { execFile } = require('child_process');

var js = JSON.stringify({a:"fiore", b:[1,2,3], c:{}, d:[]});

execFile('/tmp/comm.py', [js], { encoding: 'utf8' }, (error, stdout) => {
    if (error) {
        throw new Error(error);
    }
    console.log(stdout);
});

python_script.py

#!/usr/bin/env python3

import sys
import json

if __name__=="__main__":
    args = sys.argv
    print (args)
    print (json.loads(args[1]))