code: def add_chassis(self, chassis, port=22611, password='xena'):
          
  
          if chassis not in self.chassis_list:
              try:
                  XenaChassis(self, chassis, port, password)
              except Exception as error:
                  self.objects.pop('{}/{}'.format(self.owner, chassis))
                  raise error
          return self.chassis_list[chassis]
docs: Add chassis.
  
          XenaManager-2G -> Add Chassis.
  
          :param chassis: chassis IP address
          :param port: chassis port number
          :param password: chassis password
          :return: newly created chassis
          :rtype: xenamanager.xena_app.XenaChassis