Interprocess communication of node.js and python

child.py

#!/usr/bin/env python
# -*- coding:utf-8 -*-

import sys

sys.stdout.write("run\n")

sys.stdout.write(">> ")

for line in iter(sys.stdin.readline, ""):
    if line.strip() != "":
        sys.stdout.write("from python: " + line)
    sys.stdout.write(">> ")
    
sys.stdout.write("\n")

main.js

var spawn = require('child_process').spawn;

var child = spawn('python', ['-u', 'child.py']);

child.stdout.on('data', function(data) {
  process.stdout.write(data);
});

child.stdout.on('close', function() {
  process.stdout.write('close');
});

child.kill();