docs: def execute_ping(host_list, remote_user, remote_pass,
                   sudo=False, sudo_user=None, sudo_pass=None):
      '''
      Execute ls on some hosts
      '''
      runner = spam.ansirunner.AnsibleRunner()
      result, failed_hosts = runner.ansible_perform_operation(
          host_list=host_list,
          remote_user=remote_user,
          remote_pass=remote_pass,
          sudo=sudo,
          sudo_pass=sudo_pass,
          sudo_user=sudo_user,
          module="ping")
  
      print result, failed_hosts
      dark_hosts = runner.ansible_get_dark_hosts(result)
      print "dark hosts: ", dark_hosts