{
 "metadata": {
  "name": "helloworld"
 }, 
 "nbformat": 2, 
 "worksheets": [
  {
   "cells": [
    {
     "cell_type": "markdown", 
     "source": [
      "# Distributed hello world", 
      "", 
      "Originally by Ken Kinder (ken at kenkinder dom com)"
     ]
    }, 
    {
     "cell_type": "code", 
     "collapsed": true, 
     "input": [
      "from IPython.parallel import Client"
     ], 
     "language": "python", 
     "outputs": [], 
     "prompt_number": 1
    }, 
    {
     "cell_type": "code", 
     "collapsed": true, 
     "input": [
      "rc = Client()", 
      "view = rc.load_balanced_view()"
     ], 
     "language": "python", 
     "outputs": [], 
     "prompt_number": 2
    }, 
    {
     "cell_type": "code", 
     "collapsed": true, 
     "input": [
      "def sleep_and_echo(t, msg):", 
      "    import time", 
      "    time.sleep(t)", 
      "    return msg"
     ], 
     "language": "python", 
     "outputs": [], 
     "prompt_number": 3
    }, 
    {
     "cell_type": "code", 
     "collapsed": true, 
     "input": [
      "world = view.apply_async(sleep_and_echo, 3, 'World!')", 
      "hello = view.apply_async(sleep_and_echo, 2, 'Hello')"
     ], 
     "language": "python", 
     "outputs": [], 
     "prompt_number": 4
    }, 
    {
     "cell_type": "code", 
     "collapsed": false, 
     "input": [
      "print \"Submitted tasks:\", hello.msg_ids, world.msg_ids", 
      "print hello.get(), world.get()"
     ], 
     "language": "python", 
     "outputs": [
      {
       "output_type": "stream", 
       "stream": "stdout", 
       "text": [
        "Submitted tasks: ['dd1052e0-aa75-4b25-9d35-ecbdaf6e3ed7'] ['1b46aa21-20d1-459c-bc36-2d8d03336f74']", 
        "Hello"
       ]
      }, 
      {
       "output_type": "stream", 
       "stream": "stdout", 
       "text": [
        " World!"
       ]
      }
     ], 
     "prompt_number": 5
    }
   ]
  }
 ]
}