How to use the falcon.HTTP_204 function in falcon

def test_head(self):
        response = self.simulate_head('/v1.1/ping')
        self.assertEqual(self.srmock.status, falcon.HTTP_204)
        self.assertEqual(response, [])

def test_metadata_deserialization(self):
        # Normal case
        self.simulate_put(self.queue_path + '/metadata',
                          self.project_id,
                          body='{"timespace": "Shangri-la"}')

        self.assertEqual(self.srmock.status, falcon.HTTP_204)

        # Too long
        max_queue_metadata = 64

        doc_tmpl = '{{"Dragon Torc":"{0}"}}'
        doc_tmpl_ws = '{{ "Dragon Torc" : "{0}" }}'  # with whitespace
        envelope_length = len(doc_tmpl.format(''))

        for tmpl in doc_tmpl, doc_tmpl_ws:
            gen = '0' * (max_queue_metadata - envelope_length + 1)
            doc = tmpl.format(gen)
            self.simulate_put(self.queue_path + '/metadata',
                              self.project_id,
                              body=doc)

            self.assertEqual(self.srmock.status, falcon.HTTP_400)

now = timeutils.utcnow_ts()
                now_dt = datetime.datetime.utcfromtimestamp(now)
                ttl = self._conf.transport.default_subscription_ttl
                expires = now_dt + datetime.timedelta(seconds=ttl)
                api_version = req.path.split('/')[1]
                sub = self._subscription_controller.get(queue_name,
                                                        subscription_id,
                                                        project=project_id)
                self._notification.send_confirm_notification(queue_name,
                                                             sub,
                                                             self._conf,
                                                             project_id,
                                                             str(expires),
                                                             api_version,
                                                             True)
            resp.status = falcon.HTTP_204
            resp.location = req.path
        except storage_errors.SubscriptionDoesNotExist as ex:
            LOG.debug(ex)
            raise wsgi_errors.HTTPNotFound(six.text_type(ex))
        except validation.ValidationFailed as ex:
            LOG.debug(ex)
            raise wsgi_errors.HTTPBadRequestAPI(six.text_type(ex))
        except Exception:
            description = (_(u'Subscription %(subscription_id)s could not be'
                             ' confirmed.') %
                           dict(subscription_id=subscription_id))
            LOG.exception(description)
            raise falcon.HTTPBadRequest(_('Unable to confirm subscription'),
                                        description)

def on_delete(self, req, res, notification_method_id):
        helpers.validate_authorization(req, self._default_authorized_roles)
        self._delete_notification(req.project_id, notification_method_id)
        res.status = falcon.HTTP_204

def do_delete_stream_definitions(self, req, res, id):

        helpers.validate_authorization(req, self._default_authorized_roles)
        tenant_id = helpers.get_tenant_id(req)
        self._stream_definition_delete(tenant_id, id)
        res.status = falcon.HTTP_204

except Exception:
            description = _(u'Claim could not be created.')
            LOG.exception(description)
            raise wsgi_errors.HTTPServiceUnavailable(description)

        # Serialize claimed messages, if any. This logic assumes
        # the storage driver returned well-formed messages.
        if len(resp_msgs) != 0:
            resp_msgs = [wsgi_utils.format_message_v1(
                msg, req.path.rpartition('/')[0], cid) for msg in resp_msgs]

            resp.location = req.path + '/' + cid
            resp.body = utils.to_json(resp_msgs)
            resp.status = falcon.HTTP_201
        else:
            resp.status = falcon.HTTP_204

def do_delete_transforms(self, req, res, transform_id):
        helpers.validate_authorization(req, self._default_authorized_roles)
        tenant_id = helpers.get_tenant_id(req)
        self._delete_transform(tenant_id, transform_id)
        res.status = falcon.HTTP_204

value=int(req.content_length))

        tenant_id = (req.cross_project_id if req.cross_project_id
                     else req.project_id)

        try:
            self._processor.send_message(
                logs=log_list,
                global_dimensions=global_dimensions,
                log_tenant_id=tenant_id
            )
        except Exception as ex:
            res.status = getattr(ex, 'status', falcon.HTTP_500)
            return

        res.status = falcon.HTTP_204

def do_post_events(self, req, res):
        helpers.validate_json_content_type(req)
        helpers.validate_authorization(req, self._post_events_authorized_roles)
        event = helpers.read_http_resource(req)
        self._validate_event(event)
        tenant_id = helpers.get_tenant_id(req)
        transformed_event = self._event_transform(event, tenant_id,
                                                  self._region)
        self._send_event(transformed_event)
        res.status = falcon.HTTP_204

def on_get(self, req, resp):
        """
        It really does nothing right now. It may do more later
        """
        resp.status = falcon.HTTP_204