code: def change_contact_host_notification_timeperiod(self, contact, notification_timeperiod):
          
          # todo: deprecate this
          contact.modified_host_attributes |= DICT_MODATTR["MODATTR_NOTIFICATION_TIMEPERIOD"].value
          contact.host_notification_period = notification_timeperiod
          self.send_an_element(contact.get_update_status_brok())
docs: Change contact host notification timeperiod value
          Format of the line that triggers function call::
  
          CHANGE_CONTACT_HOST_NOTIFICATION_TIMEPERIOD;<contact_name>;<notification_timeperiod>
  
          :param contact: contact to edit
          :type contact: alignak.objects.contact.Contact
          :param notification_timeperiod: timeperiod to set
          :type notification_timeperiod: alignak.objects.timeperiod.Timeperiod
          :return: None