NodeJS - Python

nodepython.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {
    "collapsed": false,
    "deletable": true,
    "editable": true
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Overwriting hello.py\n"
     ]
    }
   ],
   "source": [
    "%%writefile hello.py\n",
    "import os\n",
    "import json\n",
    "print \"Python Start\"\n",
    "# 0: stdin, 1: stdout, 3: stderr\n",
    "to_node = os.fdopen(3, \"w+\")\n",
    "\n",
    "print to_node.write(json.dumps({'status': 'ok'}))\n",
    "print \"Python End\""
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {
    "collapsed": false,
    "deletable": true,
    "editable": true
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Spawning proces\n",
      "PID: 51055\n",
      "Python Start\n",
      "None\n",
      "Python End\n",
      "0 null\n",
      "child process exited with code 0\n"
     ]
    }
   ],
   "source": [
    "%%bash -c node\n",
    "\n",
    "const spawn = require('child_process').spawn;\n",
    "\n",
    "console.log(\"Spawning proces\");\n",
    "var child = spawn('python2', ['hello.py'], {\n",
    "  stdio:['inherit', 'inherit', 'inherit', 'ipc']\n",
    "});\n",
    "\n",
    "console.log(\"PID:\", child.pid)\n",
    "\n",
    "child.on('message', function(message) {\n",
    "  console.log('Received message...');\n",
    "  console.log(message);\n",
    "});\n",
    "\n",
    "child.on('exit', (e1, e2) => {\n",
    "   console.log(e1, e2); \n",
    "});\n",
    "\n",
    "child.on('error', function(err) {\n",
    "    console.err(\":(\" + err);\n",
    "});\n",
    "\n",
    "child.on('close', (code) => {\n",
    "  console.log(`child process exited with code ${code}`);\n",
    "});\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Ejecutando `ls`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {
    "collapsed": false,
    "deletable": true,
    "editable": true
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "stdout: total 16\n",
      "lrwxr-xr-x     1 root    wheel     8B Oct 31 11:07 X11 -> /opt/X11\n",
      "lrwxr-xr-x     1 root    wheel     8B Oct 31 11:07 X11R6 -> /opt/X11\n",
      "drwxr-xr-x  1060 root    wheel    35K Feb  2 12:16 bin\n",
      "drwxr-xr-x   261 root    wheel   8.7K Dec 14 10:30 include\n",
      "drwxr-xr-x   302 root    wheel    10K Feb  2 12:16 lib\n",
      "drwxr-xr-x   205 root    wheel   6.8K Feb  2 12:18 libexec\n",
      "drwxr-xr-x    24 nahuel  wheel   816B Feb 22 08:48 local\n",
      "drwxr-xr-x   246 root    wheel   8.2K Feb  2 12:16 sbin\n",
      "drwxr-xr-x    47 root    wheel   1.6K Oct  9 02:32 share\n",
      "drwxr-xr-x     5 root    wheel   170B Dec 21 04:13 standalone\n",
      "\n",
      "child process exited with code 0\n"
     ]
    }
   ],
   "source": [
    "%%bash -c node\n",
    "const spawn = require('child_process').spawn;\n",
    "const ls = spawn('ls', ['-lh', '/usr']);\n",
    "\n",
    "ls.stdout.on('data', (data) => {\n",
    "  console.log(`stdout: ${data}`);\n",
    "});\n",
    "\n",
    "ls.stderr.on('data', (data) => {\n",
    "  console.log(`stderr: ${data}`);\n",
    "});\n",
    "\n",
    "ls.on('close', (code) => {\n",
    "  console.log(`child process exited with code ${code}`);\n",
    "});"
   ]
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 2",
   "language": "python",
   "name": "python2"
  },
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 2
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython2",
   "version": "2.7.13"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 2
}