new_contents: from subprocess import Popen
  import sys
  import urllib2
  import time
  # Find hostname to use for passing to webdriver
  resp=urllib2.urlopen('http://169.254.169.254/latest/meta-data/public-hostname')
  PHOST=resp.read()
  
  # Poll Hub interface to determine free/busy status of resources
  def freeCheck():
          try:
                  response=urllib2.urlopen('http://localhost:4200/grid/console')
                  html=response.read()
                  exit
          except urllib2.URLError:
                  pass
  
          count = html.count("platform=")
          return count
  
  # If resources available (first condition) add more requests
  #   - rename whatever test you want to run to the 'sdtest.py' value
  # Otherwise, exit and wait a while
  #if 'type=WebDriver' in html:
  freeCount=freeCheck()
  while freeCount>0:
          if freeCount < 4:
                  Popen('python gridExecute.py '+str(idx)+' 0 labstest.py 4000000 '+PHOST+'&',shell=True)
                  freeCount = 0
                  exit
          else:
                  Popen('python gridExecute.py 4 0 labstest.py 4000000 '+PHOST+'&',shell=True)
                  time.sleep(60)
                  try:
                          freeCount=freeCheck()
                          print('fc:'+str(freeCount))
                  except:
                          exit
  
subject: update automatic execution file