code: def shellne(command):
      
  
      child = os.popen(command)
      data = child.read()
      err = child.close()
      if err:
          raise RuntimeError('%s failed w/ exit code %d' % (command, err))
      return data
docs: Runs 'commands' on the underlying shell; any stderr is echo'd to the
          console.
  
          Raises a RuntimeException on any shell exec errors.