code: def enable_host_event_handler(self, host):
          
          if not host.event_handler_enabled:
              host.modified_attributes |= \
                  DICT_MODATTR["MODATTR_EVENT_HANDLER_ENABLED"].value
              host.event_handler_enabled = True
              self.send_an_element(host.get_update_status_brok())
docs: Enable event handlers for a host
          Format of the line that triggers function call::
  
          ENABLE_HOST_EVENT_HANDLER;<host_name>
  
          :param host: host to edit
          :type host: alignak.objects.host.Host
          :return: None