docs: def describe_guest(userid):
      """ Get the basic information of virtual machine.
  
      Input parameters:
      :userid:    USERID of the guest, last 8 if length > 8
      """
      # Check if the guest exists.
      guest_list_info = client.send_request('guest_list')
      userid_1 = (unicode(userid, "utf-8") if sys.version[0] == '2' else userid)
  
      if userid_1 not in guest_list_info['output']:
          raise RuntimeError("Guest %s does not exist!" % userid)
  
  
      guest_describe_info = client.send_request('guest_get_definition_info', userid)
      print("\nThe created guest %s's info are: \n%s\n" % (userid, guest_describe_info))