Replace returnValue with return (#5736)

changelog.d/5736.misc

@@ -0,0 +1 @@
+Replace uses of returnValue with plain return, as returnValue is not needed on Python 3.

docs/log_contexts.rst

@@ -148,7 +148,7 @@ call any other functions.
         d = more_stuff()
         result = yield d            # also fine, of course
 
-        defer.returnValue(result)
+        return result
 
     def nonInlineCallbacksFun():
         logger.debug("just a wrapper really")

synapse/api/auth.py

@@ -128,7 +128,7 @@ class Auth(object):
             )
 
         self._check_joined_room(member, user_id, room_id)
-        defer.returnValue(member)
+        return member
 
     @defer.inlineCallbacks
     def check_user_was_in_room(self, room_id, user_id):
@@ -156,13 +156,13 @@ class Auth(object):
             if forgot:
                 raise AuthError(403, "User %s not in room %s" % (user_id, room_id))
 
-        defer.returnValue(member)
+        return member
 
     @defer.inlineCallbacks
     def check_host_in_room(self, room_id, host):
         with Measure(self.clock, "check_host_in_room"):
             latest_event_ids = yield self.store.is_host_joined(room_id, host)
-            defer.returnValue(latest_event_ids)
+            return latest_event_ids
 
     def _check_joined_room(self, member, user_id, room_id):
         if not member or member.membership != Membership.JOIN:
@@ -219,9 +219,7 @@ class Auth(object):
                         device_id="dummy-device",  # stubbed
                     )
 
-                defer.returnValue(
-                    synapse.types.create_requester(user_id, app_service=app_service)
-                )
+                return synapse.types.create_requester(user_id, app_service=app_service)
 
             user_info = yield self.get_user_by_access_token(access_token, rights)
             user = user_info["user"]
@@ -262,10 +260,8 @@ class Auth(object):
 
             request.authenticated_entity = user.to_string()
 
-            defer.returnValue(
-                synapse.types.create_requester(
-                    user, token_id, is_guest, device_id, app_service=app_service
-                )
+            return synapse.types.create_requester(
+                user, token_id, is_guest, device_id, app_service=app_service
             )
         except KeyError:
             raise MissingClientTokenError()
@@ -276,25 +272,25 @@ class Auth(object):
             self.get_access_token_from_request(request)
         )
         if app_service is None:
-            defer.returnValue((None, None))
+            return (None, None)
 
         if app_service.ip_range_whitelist:
             ip_address = IPAddress(self.hs.get_ip_from_request(request))
             if ip_address not in app_service.ip_range_whitelist:
-                defer.returnValue((None, None))
+                return (None, None)
 
         if b"user_id" not in request.args:
-            defer.returnValue((app_service.sender, app_service))
+            return (app_service.sender, app_service)
 
         user_id = request.args[b"user_id"][0].decode("utf8")
         if app_service.sender == user_id:
-            defer.returnValue((app_service.sender, app_service))
+            return (app_service.sender, app_service)
 
         if not app_service.is_interested_in_user(user_id):
             raise AuthError(403, "Application service cannot masquerade as this user.")
         if not (yield self.store.get_user_by_id(user_id)):
             raise AuthError(403, "Application service has not registered this user")
-        defer.returnValue((user_id, app_service))
+        return (user_id, app_service)
 
     @defer.inlineCallbacks
     def get_user_by_access_token(self, token, rights="access"):
@@ -330,7 +326,7 @@ class Auth(object):
                         msg="Access token has expired", soft_logout=True
                     )
 
-                defer.returnValue(r)
+                return r
 
         # otherwise it needs to be a valid macaroon
         try:
@@ -378,7 +374,7 @@ class Auth(object):
                 }
             else:
                 raise RuntimeError("Unknown rights setting %s", rights)
-            defer.returnValue(ret)
+            return ret
         except (
             _InvalidMacaroonException,
             pymacaroons.exceptions.MacaroonException,
@@ -506,7 +502,7 @@ class Auth(object):
     def _look_up_user_by_access_token(self, token):
         ret = yield self.store.get_user_by_access_token(token)
         if not ret:
-            defer.returnValue(None)
+            return None
 
         # we use ret.get() below because *lots* of unit tests stub out
         # get_user_by_access_token in a way where it only returns a couple of
@@ -518,7 +514,7 @@ class Auth(object):
             "device_id": ret.get("device_id"),
             "valid_until_ms": ret.get("valid_until_ms"),
         }
-        defer.returnValue(user_info)
+        return user_info
 
     def get_appservice_by_req(self, request):
         token = self.get_access_token_from_request(request)
@@ -543,7 +539,7 @@ class Auth(object):
     @defer.inlineCallbacks
     def compute_auth_events(self, event, current_state_ids, for_verification=False):
         if event.type == EventTypes.Create:
-            defer.returnValue([])
+            return []
 
         auth_ids = []
 
@@ -604,7 +600,7 @@ class Auth(object):
             if member_event.content["membership"] == Membership.JOIN:
                 auth_ids.append(member_event.event_id)
 
-        defer.returnValue(auth_ids)
+        return auth_ids
 
     @defer.inlineCallbacks
     def check_can_change_room_list(self, room_id, user):
@@ -618,7 +614,7 @@ class Auth(object):
 
         is_admin = yield self.is_server_admin(user)
         if is_admin:
-            defer.returnValue(True)
+            return True
 
         user_id = user.to_string()
         yield self.check_joined_room(room_id, user_id)
@@ -712,7 +708,7 @@ class Auth(object):
             #  * The user is a guest user, and has joined the room
             # else it will throw.
             member_event = yield self.check_user_was_in_room(room_id, user_id)
-            defer.returnValue((member_event.membership, member_event.event_id))
+            return (member_event.membership, member_event.event_id)
         except AuthError:
             visibility = yield self.state.get_current_state(
                 room_id, EventTypes.RoomHistoryVisibility, ""
@@ -721,7 +717,7 @@ class Auth(object):
                 visibility
                 and visibility.content["history_visibility"] == "world_readable"
             ):
-                defer.returnValue((Membership.JOIN, None))
+                return (Membership.JOIN, None)
                 return
             raise AuthError(
                 403, "Guest access not allowed", errcode=Codes.GUEST_ACCESS_FORBIDDEN

synapse/api/filtering.py

@@ -132,7 +132,7 @@ class Filtering(object):
     @defer.inlineCallbacks
     def get_user_filter(self, user_localpart, filter_id):
         result = yield self.store.get_user_filter(user_localpart, filter_id)
-        defer.returnValue(FilterCollection(result))
+        return FilterCollection(result)
 
     def add_user_filter(self, user_localpart, user_filter):
         self.check_valid_filter(user_filter)

synapse/app/frontend_proxy.py

@@ -70,12 +70,12 @@ class PresenceStatusStubServlet(RestServlet):
         except HttpResponseException as e:
             raise e.to_synapse_error()
 
-        defer.returnValue((200, result))
+        return (200, result)
 
     @defer.inlineCallbacks
     def on_PUT(self, request, user_id):
         yield self.auth.get_user_by_req(request)
-        defer.returnValue((200, {}))
+        return (200, {})
 
 
 class KeyUploadServlet(RestServlet):
@@ -126,11 +126,11 @@ class KeyUploadServlet(RestServlet):
                 self.main_uri + request.uri.decode("ascii"), body, headers=headers
             )
 
-            defer.returnValue((200, result))
+            return (200, result)
         else:
             # Just interested in counts.
             result = yield self.store.count_e2e_one_time_keys(user_id, device_id)
-            defer.returnValue((200, {"one_time_key_counts": result}))
+            return (200, {"one_time_key_counts": result})
 
 
 class FrontendProxySlavedStore(

synapse/app/homeserver.py

@@ -406,7 +406,7 @@ def setup(config_options):
         if provision:
             yield acme.provision_certificate()
 
-        defer.returnValue(provision)
+        return provision
 
     @defer.inlineCallbacks
     def reprovision_acme():

synapse/appservice/__init__.py

@@ -175,21 +175,21 @@ class ApplicationService(object):
     @defer.inlineCallbacks
     def _matches_user(self, event, store):
         if not event:
-            defer.returnValue(False)
+            return False
 
         if self.is_interested_in_user(event.sender):
-            defer.returnValue(True)
+            return True
         # also check m.room.member state key
         if event.type == EventTypes.Member and self.is_interested_in_user(
             event.state_key
         ):
-            defer.returnValue(True)
+            return True
 
         if not store:
-            defer.returnValue(False)
+            return False
 
         does_match = yield self._matches_user_in_member_list(event.room_id, store)
-        defer.returnValue(does_match)
+        return does_match
 
     @cachedInlineCallbacks(num_args=1, cache_context=True)
     def _matches_user_in_member_list(self, room_id, store, cache_context):
@@ -200,8 +200,8 @@ class ApplicationService(object):
         # check joined member events
         for user_id in member_list:
             if self.is_interested_in_user(user_id):
-                defer.returnValue(True)
-        defer.returnValue(False)
+                return True
+        return False
 
     def _matches_room_id(self, event):
         if hasattr(event, "room_id"):
@@ -211,13 +211,13 @@ class ApplicationService(object):
     @defer.inlineCallbacks
     def _matches_aliases(self, event, store):
         if not store or not event:
-            defer.returnValue(False)
+            return False
 
         alias_list = yield store.get_aliases_for_room(event.room_id)
         for alias in alias_list:
             if self.is_interested_in_alias(alias):
-                defer.returnValue(True)
-        defer.returnValue(False)
+                return True
+        return False
 
     @defer.inlineCallbacks
     def is_interested(self, event, store=None):
@@ -231,15 +231,15 @@ class ApplicationService(object):
         """
         # Do cheap checks first
         if self._matches_room_id(event):
-            defer.returnValue(True)
+            return True
 
         if (yield self._matches_aliases(event, store)):
-            defer.returnValue(True)
+            return True
 
         if (yield self._matches_user(event, store)):
-            defer.returnValue(True)
+            return True
 
-        defer.returnValue(False)
+        return False
 
     def is_interested_in_user(self, user_id):
         return (

synapse/appservice/api.py

@@ -97,40 +97,40 @@ class ApplicationServiceApi(SimpleHttpClient):
     @defer.inlineCallbacks
     def query_user(self, service, user_id):
         if service.url is None:
-            defer.returnValue(False)
+            return False
         uri = service.url + ("/users/%s" % urllib.parse.quote(user_id))
         response = None
         try:
             response = yield self.get_json(uri, {"access_token": service.hs_token})
             if response is not None:  # just an empty json object
-                defer.returnValue(True)
+                return True
         except CodeMessageException as e:
             if e.code == 404:
-                defer.returnValue(False)
+                return False
                 return
             logger.warning("query_user to %s received %s", uri, e.code)
         except Exception as ex:
             logger.warning("query_user to %s threw exception %s", uri, ex)
-        defer.returnValue(False)
+        return False
 
     @defer.inlineCallbacks
     def query_alias(self, service, alias):
         if service.url is None:
-            defer.returnValue(False)
+            return False
         uri = service.url + ("/rooms/%s" % urllib.parse.quote(alias))
         response = None
         try:
             response = yield self.get_json(uri, {"access_token": service.hs_token})
             if response is not None:  # just an empty json object
-                defer.returnValue(True)
+                return True
         except CodeMessageException as e:
             logger.warning("query_alias to %s received %s", uri, e.code)
             if e.code == 404:
-                defer.returnValue(False)
+                return False
                 return
         except Exception as ex:
             logger.warning("query_alias to %s threw exception %s", uri, ex)
-        defer.returnValue(False)
+        return False
 
     @defer.inlineCallbacks
     def query_3pe(self, service, kind, protocol, fields):
@@ -141,7 +141,7 @@ class ApplicationServiceApi(SimpleHttpClient):
         else:
             raise ValueError("Unrecognised 'kind' argument %r to query_3pe()", kind)
         if service.url is None:
-            defer.returnValue([])
+            return []
 
         uri = "%s%s/thirdparty/%s/%s" % (
             service.url,
@@ -155,7 +155,7 @@ class ApplicationServiceApi(SimpleHttpClient):
                 logger.warning(
                     "query_3pe to %s returned an invalid response %r", uri, response
                 )
-                defer.returnValue([])
+                return []
 
             ret = []
             for r in response:
@@ -166,14 +166,14 @@ class ApplicationServiceApi(SimpleHttpClient):
                         "query_3pe to %s returned an invalid result %r", uri, r
                     )
 
-            defer.returnValue(ret)
+            return ret
         except Exception as ex:
             logger.warning("query_3pe to %s threw exception %s", uri, ex)
-            defer.returnValue([])
+            return []
 
     def get_3pe_protocol(self, service, protocol):
         if service.url is None:
-            defer.returnValue({})
+            return {}
 
         @defer.inlineCallbacks
         def _get():
@@ -189,7 +189,7 @@ class ApplicationServiceApi(SimpleHttpClient):
                     logger.warning(
                         "query_3pe_protocol to %s did not return a" " valid result", uri
                     )
-                    defer.returnValue(None)
+                    return None
 
                 for instance in info.get("instances", []):
                     network_id = instance.get("network_id", None)
@@ -198,10 +198,10 @@ class ApplicationServiceApi(SimpleHttpClient):
                             service.id, network_id
                         ).to_string()
 
-                defer.returnValue(info)
+                return info
             except Exception as ex:
                 logger.warning("query_3pe_protocol to %s threw exception %s", uri, ex)
-                defer.returnValue(None)
+                return None
 
         key = (service.id, protocol)
         return self.protocol_meta_cache.wrap(key, _get)
@@ -209,7 +209,7 @@ class ApplicationServiceApi(SimpleHttpClient):
     @defer.inlineCallbacks
     def push_bulk(self, service, events, txn_id=None):
         if service.url is None:
-            defer.returnValue(True)
+            return True
 
         events = self._serialize(events)
 
@@ -229,14 +229,14 @@ class ApplicationServiceApi(SimpleHttpClient):
             )
             sent_transactions_counter.labels(service.id).inc()
             sent_events_counter.labels(service.id).inc(len(events))
-            defer.returnValue(True)
+            return True
             return
         except CodeMessageException as e:
             logger.warning("push_bulk to %s received %s", uri, e.code)
         except Exception as ex:
             logger.warning("push_bulk to %s threw exception %s", uri, ex)
         failed_transactions_counter.labels(service.id).inc()
-        defer.returnValue(False)
+        return False
 
     def _serialize(self, events):
         time_now = self.clock.time_msec()

synapse/appservice/scheduler.py

@@ -193,7 +193,7 @@ class _TransactionController(object):
     @defer.inlineCallbacks
     def _is_service_up(self, service):
         state = yield self.store.get_appservice_state(service)
-        defer.returnValue(state == ApplicationServiceState.UP or state is None)
+        return state == ApplicationServiceState.UP or state is None
 
 
 class _Recoverer(object):
@@ -208,7 +208,7 @@ class _Recoverer(object):
                 r.service.id,
             )
             r.recover()
-        defer.returnValue(recoverers)
+        return recoverers
 
     def __init__(self, clock, store, as_api, service, callback):
         self.clock = clock

synapse/crypto/keyring.py

@@ -462,7 +462,7 @@ class StoreKeyFetcher(KeyFetcher):
         keys = {}
         for (server_name, key_id), key in res.items():
             keys.setdefault(server_name, {})[key_id] = key
-        defer.returnValue(keys)
+        return keys
 
 
 class BaseV2KeyFetcher(object):
@@ -566,7 +566,7 @@ class BaseV2KeyFetcher(object):
             ).addErrback(unwrapFirstError)
         )
 
-        defer.returnValue(verify_keys)
+        return verify_keys
 
 
 class PerspectivesKeyFetcher(BaseV2KeyFetcher):
@@ -588,7 +588,7 @@ class PerspectivesKeyFetcher(BaseV2KeyFetcher):
                 result = yield self.get_server_verify_key_v2_indirect(
                     keys_to_fetch, key_server
                 )
-                defer.returnValue(result)
+                return result
             except KeyLookupError as e:
                 logger.warning(
                     "Key lookup failed from %r: %s", key_server.server_name, e
@@ -601,7 +601,7 @@ class PerspectivesKeyFetcher(BaseV2KeyFetcher):
                     str(e),
                 )
 
-            defer.returnValue({})
+            return {}
 
         results = yield make_deferred_yieldable(
             defer.gatherResults(
@@ -615,7 +615,7 @@ class PerspectivesKeyFetcher(BaseV2KeyFetcher):
             for server_name, keys in result.items():
                 union_of_keys.setdefault(server_name, {}).update(keys)
 
-        defer.returnValue(union_of_keys)
+        return union_of_keys
 
     @defer.inlineCallbacks
     def get_server_verify_key_v2_indirect(self, keys_to_fetch, key_server):
@@ -701,7 +701,7 @@ class PerspectivesKeyFetcher(BaseV2KeyFetcher):
             perspective_name, time_now_ms, added_keys
         )
 
-        defer.returnValue(keys)
+        return keys
 
     def _validate_perspectives_response(self, key_server, response):
         """Optionally check the signature on the result of a /key/query request
@@ -843,7 +843,7 @@ class ServerKeyFetcher(BaseV2KeyFetcher):
             )
             keys.update(response_keys)
 
-        defer.returnValue(keys)
+        return keys
 
 
 @defer.inlineCallbacks

synapse/events/builder.py

@@ -144,15 +144,13 @@ class EventBuilder(object):
         if self._origin_server_ts is not None:
             event_dict["origin_server_ts"] = self._origin_server_ts
 
-        defer.returnValue(
-            create_local_event_from_event_dict(
-                clock=self._clock,
-                hostname=self._hostname,
-                signing_key=self._signing_key,
-                format_version=self.format_version,
-                event_dict=event_dict,
-                internal_metadata_dict=self.internal_metadata.get_dict(),
-            )
+        return create_local_event_from_event_dict(
+            clock=self._clock,
+            hostname=self._hostname,
+            signing_key=self._signing_key,
+            format_version=self.format_version,
+            event_dict=event_dict,
+            internal_metadata_dict=self.internal_metadata.get_dict(),
         )
 
 

synapse/events/snapshot.py

@@ -133,19 +133,17 @@ class EventContext(object):
         else:
             prev_state_id = None
 
-        defer.returnValue(
-            {
-                "prev_state_id": prev_state_id,
-                "event_type": event.type,
-                "event_state_key": event.state_key if event.is_state() else None,
-                "state_group": self.state_group,
-                "rejected": self.rejected,
-                "prev_group": self.prev_group,
-                "delta_ids": _encode_state_dict(self.delta_ids),
-                "prev_state_events": self.prev_state_events,
-                "app_service_id": self.app_service.id if self.app_service else None,
-            }
-        )
+        return {
+            "prev_state_id": prev_state_id,
+            "event_type": event.type,
+            "event_state_key": event.state_key if event.is_state() else None,
+            "state_group": self.state_group,
+            "rejected": self.rejected,
+            "prev_group": self.prev_group,
+            "delta_ids": _encode_state_dict(self.delta_ids),
+            "prev_state_events": self.prev_state_events,
+            "app_service_id": self.app_service.id if self.app_service else None,
+        }
 
     @staticmethod
     def deserialize(store, input):
@@ -202,7 +200,7 @@ class EventContext(object):
 
         yield make_deferred_yieldable(self._fetching_state_deferred)
 
-        defer.returnValue(self._current_state_ids)
+        return self._current_state_ids
 
     @defer.inlineCallbacks
     def get_prev_state_ids(self, store):
@@ -222,7 +220,7 @@ class EventContext(object):
 
         yield make_deferred_yieldable(self._fetching_state_deferred)
 
-        defer.returnValue(self._prev_state_ids)
+        return self._prev_state_ids
 
     def get_cached_current_state_ids(self):
         """Gets the current state IDs if we have them already cached.

synapse/events/third_party_rules.py

@@ -51,7 +51,7 @@ class ThirdPartyEventRules(object):
             defer.Deferred[bool]: True if the event should be allowed, False if not.
         """
         if self.third_party_rules is None:
-            defer.returnValue(True)
+            return True
 
         prev_state_ids = yield context.get_prev_state_ids(self.store)
 
@@ -61,7 +61,7 @@ class ThirdPartyEventRules(object):
             state_events[key] = yield self.store.get_event(event_id, allow_none=True)
 
         ret = yield self.third_party_rules.check_event_allowed(event, state_events)
-        defer.returnValue(ret)
+        return ret
 
     @defer.inlineCallbacks
     def on_create_room(self, requester, config, is_requester_admin):
@@ -98,7 +98,7 @@ class ThirdPartyEventRules(object):
         """
 
         if self.third_party_rules is None:
-            defer.returnValue(True)
+            return True
 
         state_ids = yield self.store.get_filtered_current_state_ids(room_id)
         room_state_events = yield self.store.get_events(state_ids.values())
@@ -110,4 +110,4 @@ class ThirdPartyEventRules(object):
         ret = yield self.third_party_rules.check_threepid_can_be_invited(
             medium, address, state_events
         )
-        defer.returnValue(ret)
+        return ret

synapse/events/utils.py

@@ -360,7 +360,7 @@ class EventClientSerializer(object):
         """
         # To handle the case of presence events and the like
         if not isinstance(event, EventBase):
-            defer.returnValue(event)
+            return event
 
         event_id = event.event_id
         serialized_event = serialize_event(event, time_now, **kwargs)
@@ -406,7 +406,7 @@ class EventClientSerializer(object):
                     "sender": edit.sender,
                 }
 
-        defer.returnValue(serialized_event)
+        return serialized_event
 
     def serialize_events(self, events, time_now, **kwargs):
         """Serializes multiple events.

synapse/federation/federation_base.py

@@ -106,7 +106,7 @@ class FederationBase(object):
                     "Failed to find copy of %s with valid signature", pdu.event_id
                 )
 
-            defer.returnValue(res)
+            return res
 
         handle = preserve_fn(handle_check_result)
         deferreds2 = [handle(pdu, deferred) for pdu, deferred in zip(pdus, deferreds)]
@@ -116,9 +116,9 @@ class FederationBase(object):
         ).addErrback(unwrapFirstError)
 
         if include_none:
-            defer.returnValue(valid_pdus)
+            return valid_pdus
         else:
-            defer.returnValue([p for p in valid_pdus if p])
+            return [p for p in valid_pdus if p]
 
     def _check_sigs_and_hash(self, room_version, pdu):
         return make_deferred_yieldable(

synapse/federation/federation_client.py

@@ -213,7 +213,7 @@ class FederationClient(FederationBase):
             ).addErrback(unwrapFirstError)
         )
 
-        defer.returnValue(pdus)
+        return pdus
 
     @defer.inlineCallbacks
     @log_function
@@ -245,7 +245,7 @@ class FederationClient(FederationBase):
 
         ev = self._get_pdu_cache.get(event_id)
         if ev:
-            defer.returnValue(ev)
+            return ev
 
         pdu_attempts = self.pdu_destination_tried.setdefault(event_id, {})
 
@@ -307,7 +307,7 @@ class FederationClient(FederationBase):
         if signed_pdu:
             self._get_pdu_cache[event_id] = signed_pdu
 
-        defer.returnValue(signed_pdu)
+        return signed_pdu
 
     @defer.inlineCallbacks
     @log_function
@@ -355,7 +355,7 @@ class FederationClient(FederationBase):
 
             auth_chain.sort(key=lambda e: e.depth)
 
-            defer.returnValue((pdus, auth_chain))
+            return (pdus, auth_chain)
         except HttpResponseException as e:
             if e.code == 400 or e.code == 404:
                 logger.info("Failed to use get_room_state_ids API, falling back")
@@ -404,7 +404,7 @@ class FederationClient(FederationBase):
 
         signed_auth.sort(key=lambda e: e.depth)
 
-        defer.returnValue((signed_pdus, signed_auth))
+        return (signed_pdus, signed_auth)
 
     @defer.inlineCallbacks
     def get_events_from_store_or_dest(self, destination, room_id, event_ids):
@@ -429,7 +429,7 @@ class FederationClient(FederationBase):
             missing_events.discard(k)
 
         if not missing_events:
-            defer.returnValue((signed_events, failed_to_fetch))
+            return (signed_events, failed_to_fetch)
 
         logger.debug(
             "Fetching unknown state/auth events %s for room %s",
@@ -465,7 +465,7 @@ class FederationClient(FederationBase):
             # We removed all events we successfully fetched from `batch`
             failed_to_fetch.update(batch)
 
-        defer.returnValue((signed_events, failed_to_fetch))
+        return (signed_events, failed_to_fetch)
 
     @defer.inlineCallbacks
     @log_function
@@ -485,7 +485,7 @@ class FederationClient(FederationBase):
 
         signed_auth.sort(key=lambda e: e.depth)
 
-        defer.returnValue(signed_auth)
+        return signed_auth
 
     @defer.inlineCallbacks
     def _try_destination_list(self, description, destinations, callback):
@@ -521,7 +521,7 @@ class FederationClient(FederationBase):
 
             try:
                 res = yield callback(destination)
-                defer.returnValue(res)
+                return res
             except InvalidResponseError as e:
                 logger.warn("Failed to %s via %s: %s", description, destination, e)
             except HttpResponseException as e:
@@ -615,7 +615,7 @@ class FederationClient(FederationBase):
                 event_dict=pdu_dict,
             )
 
-            defer.returnValue((destination, ev, event_format))
+            return (destination, ev, event_format)
 
         return self._try_destination_list(
             "make_" + membership, destinations, send_request
@@ -728,13 +728,11 @@ class FederationClient(FederationBase):
 
             check_authchain_validity(signed_auth)
 
-            defer.returnValue(
-                {
-                    "state": signed_state,
-                    "auth_chain": signed_auth,
-                    "origin": destination,
-                }
-            )
+            return {
+                "state": signed_state,
+                "auth_chain": signed_auth,
+                "origin": destination,
+            }
 
         return self._try_destination_list("send_join", destinations, send_request)
 
@@ -758,7 +756,7 @@ class FederationClient(FederationBase):
 
         # FIXME: We should handle signature failures more gracefully.
 
-        defer.returnValue(pdu)
+        return pdu
 
     @defer.inlineCallbacks
     def _do_send_invite(self, destination, pdu, room_version):
@@ -786,7 +784,7 @@ class FederationClient(FederationBase):
                     "invite_room_state": pdu.unsigned.get("invite_room_state", []),
                 },
             )
-            defer.returnValue(content)
+            return content
         except HttpResponseException as e:
             if e.code in [400, 404]:
                 err = e.to_synapse_error()
@@ -821,7 +819,7 @@ class FederationClient(FederationBase):
             event_id=pdu.event_id,
             content=pdu.get_pdu_json(time_now),
         )
-        defer.returnValue(content)
+        return content
 
     def send_leave(self, destinations, pdu):
         """Sends a leave event to one of a list of homeservers.
@@ -856,7 +854,7 @@ class FederationClient(FederationBase):
             )
 
             logger.debug("Got content: %s", content)
-            defer.returnValue(None)
+            return None
 
         return self._try_destination_list("send_leave", destinations, send_request)
 
@@ -917,7 +915,7 @@ class FederationClient(FederationBase):
             "missing": content.get("missing", []),
         }
 
-        defer.returnValue(ret)
+        return ret
 
     @defer.inlineCallbacks
     def get_missing_events(
@@ -974,7 +972,7 @@ class FederationClient(FederationBase):
             # get_missing_events
             signed_events = []
 
-        defer.returnValue(signed_events)
+        return signed_events
 
     @defer.inlineCallbacks
     def forward_third_party_invite(self, destinations, room_id, event_dict):
@@ -986,7 +984,7 @@ class FederationClient(FederationBase):
                 yield self.transport_layer.exchange_third_party_invite(
                     destination=destination, room_id=room_id, event_dict=event_dict
                 )
-                defer.returnValue(None)
+                return None
             except CodeMessageException:
                 raise
             except Exception as e:

synapse/federation/federation_server.py

@@ -99,7 +99,7 @@ class FederationServer(FederationBase):
 
             res = self._transaction_from_pdus(pdus).get_dict()
 
-        defer.returnValue((200, res))
+        return (200, res)
 
     @defer.inlineCallbacks
     @log_function
@@ -126,7 +126,7 @@ class FederationServer(FederationBase):
                 origin, transaction, request_time
             )
 
-        defer.returnValue(result)
+        return result
 
     @defer.inlineCallbacks
     def _handle_incoming_transaction(self, origin, transaction, request_time):
@@ -147,8 +147,7 @@ class FederationServer(FederationBase):
                 "[%s] We've already responded to this request",
                 transaction.transaction_id,
             )
-            defer.returnValue(response)
-            return
+            return response
 
         logger.debug("[%s] Transaction is new", transaction.transaction_id)
 
@@ -163,7 +162,7 @@ class FederationServer(FederationBase):
             yield self.transaction_actions.set_response(
                 origin, transaction, 400, response
             )
-            defer.returnValue((400, response))
+            return (400, response)
 
         received_pdus_counter.inc(len(transaction.pdus))
 
@@ -265,7 +264,7 @@ class FederationServer(FederationBase):
         logger.debug("Returning: %s", str(response))
 
         yield self.transaction_actions.set_response(origin, transaction, 200, response)
-        defer.returnValue((200, response))
+        return (200, response)
 
     @defer.inlineCallbacks
     def received_edu(self, origin, edu_type, content):
@@ -298,7 +297,7 @@ class FederationServer(FederationBase):
                 event_id,
             )
 
-        defer.returnValue((200, resp))
+        return (200, resp)
 
     @defer.inlineCallbacks
     def on_state_ids_request(self, origin, room_id, event_id):
@@ -315,9 +314,7 @@ class FederationServer(FederationBase):
         state_ids = yield self.handler.get_state_ids_for_pdu(room_id, event_id)
         auth_chain_ids = yield self.store.get_auth_chain_ids(state_ids)
 
-        defer.returnValue(
-            (200, {"pdu_ids": state_ids, "auth_chain_ids": auth_chain_ids})
-        )
+        return (200, {"pdu_ids": state_ids, "auth_chain_ids": auth_chain_ids})
 
     @defer.inlineCallbacks
     def _on_context_state_request_compute(self, room_id, event_id):
@@ -336,12 +333,10 @@ class FederationServer(FederationBase):
                     )
                 )
 
-        defer.returnValue(
-            {
-                "pdus": [pdu.get_pdu_json() for pdu in pdus],
-                "auth_chain": [pdu.get_pdu_json() for pdu in auth_chain],
-            }
-        )
+        return {
+            "pdus": [pdu.get_pdu_json() for pdu in pdus],
+            "auth_chain": [pdu.get_pdu_json() for pdu in auth_chain],
+        }
 
     @defer.inlineCallbacks
     @log_function
@@ -349,15 +344,15 @@ class FederationServer(FederationBase):
         pdu = yield self.handler.get_persisted_pdu(origin, event_id)
 
         if pdu:
-            defer.returnValue((200, self._transaction_from_pdus([pdu]).get_dict()))
+            return (200, self._transaction_from_pdus([pdu]).get_dict())
         else:
-            defer.returnValue((404, ""))
+            return (404, "")
 
     @defer.inlineCallbacks
     def on_query_request(self, query_type, args):
         received_queries_counter.labels(query_type).inc()
         resp = yield self.registry.on_query(query_type, args)
-        defer.returnValue((200, resp))
+        return (200, resp)
 
     @defer.inlineCallbacks
     def on_make_join_request(self, origin, room_id, user_id, supported_versions):
@@ -371,9 +366,7 @@ class FederationServer(FederationBase):
 
         pdu = yield self.handler.on_make_join_request(room_id, user_id)
         time_now = self._clock.time_msec()
-        defer.returnValue(
-            {"event": pdu.get_pdu_json(time_now), "room_version": room_version}
-        )
+        return {"event": pdu.get_pdu_json(time_now), "room_version": room_version}
 
     @defer.inlineCallbacks
     def on_invite_request(self, origin, content, room_version):
@@ -391,7 +384,7 @@ class FederationServer(FederationBase):
         yield self.check_server_matches_acl(origin_host, pdu.room_id)
         ret_pdu = yield self.handler.on_invite_request(origin, pdu)
         time_now = self._clock.time_msec()
-        defer.returnValue({"event": ret_pdu.get_pdu_json(time_now)})
+        return {"event": ret_pdu.get_pdu_json(time_now)}
 
     @defer.inlineCallbacks
     def on_send_join_request(self, origin, content, room_id):
@@ -407,16 +400,14 @@ class FederationServer(FederationBase):
         logger.debug("on_send_join_request: pdu sigs: %s", pdu.signatures)
         res_pdus = yield self.handler.on_send_join_request(origin, pdu)
         time_now = self._clock.time_msec()
-        defer.returnValue(
-            (
-                200,
-                {
-                    "state": [p.get_pdu_json(time_now) for p in res_pdus["state"]],
-                    "auth_chain": [
-                        p.get_pdu_json(time_now) for p in res_pdus["auth_chain"]
-                    ],
-                },
-            )
+        return (
+            200,
+            {
+                "state": [p.get_pdu_json(time_now) for p in res_pdus["state"]],
+                "auth_chain": [
+                    p.get_pdu_json(time_now) for p in res_pdus["auth_chain"]
+                ],
+            },
         )
 
     @defer.inlineCallbacks
@@ -428,9 +419,7 @@ class FederationServer(FederationBase):
         room_version = yield self.store.get_room_version(room_id)
 
         time_now = self._clock.time_msec()
-        defer.returnValue(
-            {"event": pdu.get_pdu_json(time_now), "room_version": room_version}
-        )
+        return {"event": pdu.get_pdu_json(time_now), "room_version": room_version}
 
     @defer.inlineCallbacks
     def on_send_leave_request(self, origin, content, room_id):
@@ -445,7 +434,7 @@ class FederationServer(FederationBase):
 
         logger.debug("on_send_leave_request: pdu sigs: %s", pdu.signatures)
         yield self.handler.on_send_leave_request(origin, pdu)
-        defer.returnValue((200, {}))
+        return (200, {})
 
     @defer.inlineCallbacks
     def on_event_auth(self, origin, room_id, event_id):
@@ -456,7 +445,7 @@ class FederationServer(FederationBase):
             time_now = self._clock.time_msec()
             auth_pdus = yield self.handler.on_event_auth(event_id)
             res = {"auth_chain": [a.get_pdu_json(time_now) for a in auth_pdus]}
-        defer.returnValue((200, res))
+        return (200, res)
 
     @defer.inlineCallbacks
     def on_query_auth_request(self, origin, content, room_id, event_id):
@@ -509,7 +498,7 @@ class FederationServer(FederationBase):
                 "missing": ret.get("missing", []),
             }
 
-        defer.returnValue((200, send_content))
+        return (200, send_content)
 
     @log_function
     def on_query_client_keys(self, origin, content):
@@ -548,7 +537,7 @@ class FederationServer(FederationBase):
             ),
         )
 
-        defer.returnValue({"one_time_keys": json_result})
+        return {"one_time_keys": json_result}
 
     @defer.inlineCallbacks
     @log_function
@@ -580,9 +569,7 @@ class FederationServer(FederationBase):
 
             time_now = self._clock.time_msec()
 
-        defer.returnValue(
-            {"events": [ev.get_pdu_json(time_now) for ev in missing_events]}
-        )
+        return {"events": [ev.get_pdu_json(time_now) for ev in missing_events]}
 
     @log_function
     def on_openid_userinfo(self, token):
@@ -676,14 +663,14 @@ class FederationServer(FederationBase):
         ret = yield self.handler.exchange_third_party_invite(
             sender_user_id, target_user_id, room_id, signed
         )
-        defer.returnValue(ret)
+        return ret
 
     @defer.inlineCallbacks
     def on_exchange_third_party_invite_request(self, origin, room_id, event_dict):
         ret = yield self.handler.on_exchange_third_party_invite_request(
             origin, room_id, event_dict
         )
-        defer.returnValue(ret)
+        return ret
 
     @defer.inlineCallbacks
     def check_server_matches_acl(self, server_name, room_id):

synapse/federation/sender/per_destination_queue.py

@@ -374,7 +374,7 @@ class PerDestinationQueue(object):
 
         assert len(edus) <= limit, "get_devices_by_remote returned too many EDUs"
 
-        defer.returnValue((edus, now_stream_id))
+        return (edus, now_stream_id)
 
     @defer.inlineCallbacks
     def _get_to_device_message_edus(self, limit):
@@ -393,4 +393,4 @@ class PerDestinationQueue(object):
             for content in contents
         ]
 
-        defer.returnValue((edus, stream_id))
+        return (edus, stream_id)

synapse/federation/sender/transaction_manager.py

@@ -133,4 +133,4 @@ class TransactionManager(object):
                 )
             success = False
 
-        defer.returnValue(success)
+        return success

synapse/federation/transport/client.py

@@ -183,7 +183,7 @@ class TransportLayerClient(object):
             try_trailing_slash_on_400=True,
         )
 
-        defer.returnValue(response)
+        return response
 
     @defer.inlineCallbacks
     @log_function
@@ -201,7 +201,7 @@ class TransportLayerClient(object):
             ignore_backoff=ignore_backoff,
         )
 
-        defer.returnValue(content)
+        return content
 
     @defer.inlineCallbacks
     @log_function
@@ -259,7 +259,7 @@ class TransportLayerClient(object):
             ignore_backoff=ignore_backoff,
         )
 
-        defer.returnValue(content)
+        return content
 
     @defer.inlineCallbacks
     @log_function
@@ -270,7 +270,7 @@ class TransportLayerClient(object):
             destination=destination, path=path, data=content
         )
 
-        defer.returnValue(response)
+        return response
 
     @defer.inlineCallbacks
     @log_function
@@ -288,7 +288,7 @@ class TransportLayerClient(object):
             ignore_backoff=True,
         )
 
-        defer.returnValue(response)
+        return response
 
     @defer.inlineCallbacks
     @log_function
@@ -299,7 +299,7 @@ class TransportLayerClient(object):
             destination=destination, path=path, data=content, ignore_backoff=True
         )
 
-        defer.returnValue(response)
+        return response
 
     @defer.inlineCallbacks
     @log_function
@@ -310,7 +310,7 @@ class TransportLayerClient(object):
             destination=destination, path=path, data=content, ignore_backoff=True
         )
 
-        defer.returnValue(response)
+        return response
 
     @defer.inlineCallbacks
     @log_function
@@ -339,7 +339,7 @@ class TransportLayerClient(object):
             destination=remote_server, path=path, args=args, ignore_backoff=True
         )
 
-        defer.returnValue(response)
+        return response
 
     @defer.inlineCallbacks
     @log_function
@@ -350,7 +350,7 @@ class TransportLayerClient(object):
             destination=destination, path=path, data=event_dict
         )
 
-        defer.returnValue(response)
+        return response
 
     @defer.inlineCallbacks
     @log_function
@@ -359,7 +359,7 @@ class TransportLayerClient(object):
 
         content = yield self.client.get_json(destination=destination, path=path)
 
-        defer.returnValue(content)
+        return content
 
     @defer.inlineCallbacks
     @log_function
@@ -370,7 +370,7 @@ class TransportLayerClient(object):
             destination=destination, path=path, data=content
         )
 
-        defer.returnValue(content)
+        return content
 
     @defer.inlineCallbacks
     @log_function
@@ -402,7 +402,7 @@ class TransportLayerClient(object):
         content = yield self.client.post_json(
             destination=destination, path=path, data=query_content, timeout=timeout
         )
-        defer.returnValue(content)
+        return content
 
     @defer.inlineCallbacks
     @log_function
@@ -426,7 +426,7 @@ class TransportLayerClient(object):
         content = yield self.client.get_json(
             destination=destination, path=path, timeout=timeout
         )
-        defer.returnValue(content)
+        return content
 
     @defer.inlineCallbacks
     @log_function
@@ -460,7 +460,7 @@ class TransportLayerClient(object):
         content = yield self.client.post_json(
             destination=destination, path=path, data=query_content, timeout=timeout
         )
-        defer.returnValue(content)
+        return content
 
     @defer.inlineCallbacks
     @log_function
@@ -488,7 +488,7 @@ class TransportLayerClient(object):
             timeout=timeout,
         )
 
-        defer.returnValue(content)
+        return content
 
     @log_function
     def get_group_profile(self, destination, group_id, requester_user_id):

synapse/groups/attestations.py

@@ -157,7 +157,7 @@ class GroupAttestionRenewer(object):
 
         yield self.store.update_remote_attestion(group_id, user_id, attestation)
 
-        defer.returnValue({})
+        return {}
 
     def _start_renew_attestations(self):
         return run_as_background_process("renew_attestations", self._renew_attestations)

synapse/groups/groups_server.py

@@ -85,7 +85,7 @@ class GroupsServerHandler(object):
             if not is_admin:
                 raise SynapseError(403, "User is not admin in group")
 
-        defer.returnValue(group)
+        return group
 
     @defer.inlineCallbacks
     def get_group_summary(self, group_id, requester_user_id):
@@ -151,22 +151,20 @@ class GroupsServerHandler(object):
             group_id, requester_user_id
         )
 
-        defer.returnValue(
-            {
-                "profile": profile,
-                "users_section": {
-                    "users": users,
-                    "roles": roles,
-                    "total_user_count_estimate": 0,  # TODO
-                },
-                "rooms_section": {
-                    "rooms": rooms,
-                    "categories": categories,
-                    "total_room_count_estimate": 0,  # TODO
-                },
-                "user": membership_info,
-            }
-        )
+        return {
+            "profile": profile,
+            "users_section": {
+                "users": users,
+                "roles": roles,
+                "total_user_count_estimate": 0,  # TODO
+            },
+            "rooms_section": {
+                "rooms": rooms,
+                "categories": categories,
+                "total_room_count_estimate": 0,  # TODO
+            },
+            "user": membership_info,
+        }
 
     @defer.inlineCallbacks
     def update_group_summary_room(
@@ -192,7 +190,7 @@ class GroupsServerHandler(object):
             is_public=is_public,
         )
 
-        defer.returnValue({})
+        return {}
 
     @defer.inlineCallbacks
     def delete_group_summary_room(
@@ -208,7 +206,7 @@ class GroupsServerHandler(object):
             group_id=group_id, room_id=room_id, category_id=category_id
         )
 
-        defer.returnValue({})
+        return {}
 
     @defer.inlineCallbacks
     def set_group_join_policy(self, group_id, requester_user_id, content):
@@ -228,7 +226,7 @@ class GroupsServerHandler(object):
 
         yield self.store.set_group_join_policy(group_id, join_policy=join_policy)
 
-        defer.returnValue({})
+        return {}
 
     @defer.inlineCallbacks
     def get_group_categories(self, group_id, requester_user_id):
@@ -237,7 +235,7 @@ class GroupsServerHandler(object):
         yield self.check_group_is_ours(group_id, requester_user_id, and_exists=True)
 
         categories = yield self.store.get_group_categories(group_id=group_id)
-        defer.returnValue({"categories": categories})
+        return {"categories": categories}
 
     @defer.inlineCallbacks
     def get_group_category(self, group_id, requester_user_id, category_id):
@@ -249,7 +247,7 @@ class GroupsServerHandler(object):
             group_id=group_id, category_id=category_id
         )
 
-        defer.returnValue(res)
+        return res
 
     @defer.inlineCallbacks
     def update_group_category(self, group_id, requester_user_id, category_id, content):
@@ -269,7 +267,7 @@ class GroupsServerHandler(object):
             profile=profile,
         )
 
-        defer.returnValue({})
+        return {}
 
     @defer.inlineCallbacks
     def delete_group_category(self, group_id, requester_user_id, category_id):
@@ -283,7 +281,7 @@ class GroupsServerHandler(object):
             group_id=group_id, category_id=category_id
         )
 
-        defer.returnValue({})
+        return {}
 
     @defer.inlineCallbacks
     def get_group_roles(self, group_id, requester_user_id):
@@ -292,7 +290,7 @@ class GroupsServerHandler(object):
         yield self.check_group_is_ours(group_id, requester_user_id, and_exists=True)
 
         roles = yield self.store.get_group_roles(group_id=group_id)
-        defer.returnValue({"roles": roles})
+        return {"roles": roles}
 
     @defer.inlineCallbacks
     def get_group_role(self, group_id, requester_user_id, role_id):
@@ -301,7 +299,7 @@ class GroupsServerHandler(object):
         yield self.check_group_is_ours(group_id, requester_user_id, and_exists=True)
 
         res = yield self.store.get_group_role(group_id=group_id, role_id=role_id)
-        defer.returnValue(res)
+        return res
 
     @defer.inlineCallbacks
     def update_group_role(self, group_id, requester_user_id, role_id, content):
@@ -319,7 +317,7 @@ class GroupsServerHandler(object):
             group_id=group_id, role_id=role_id, is_public=is_public, profile=profile
         )
 
-        defer.returnValue({})
+        return {}
 
     @defer.inlineCallbacks
     def delete_group_role(self, group_id, requester_user_id, role_id):
@@ -331,7 +329,7 @@ class GroupsServerHandler(object):
 
         yield self.store.remove_group_role(group_id=group_id, role_id=role_id)
 
-        defer.returnValue({})
+        return {}
 
     @defer.inlineCallbacks
     def update_group_summary_user(
@@ -355,7 +353,7 @@ class GroupsServerHandler(object):
             is_public=is_public,
         )
 
-        defer.returnValue({})
+        return {}
 
     @defer.inlineCallbacks
     def delete_group_summary_user(self, group_id, requester_user_id, user_id, role_id):
@@ -369,7 +367,7 @@ class GroupsServerHandler(object):
             group_id=group_id, user_id=user_id, role_id=role_id
         )
 
-        defer.returnValue({})
+        return {}
 
     @defer.inlineCallbacks
     def get_group_profile(self, group_id, requester_user_id):
@@ -391,7 +389,7 @@ class GroupsServerHandler(object):
             group_description = {key: group[key] for key in cols}
             group_description["is_openly_joinable"] = group["join_policy"] == "open"
 
-            defer.returnValue(group_description)
+            return group_description
         else:
             raise SynapseError(404, "Unknown group")
 
@@ -461,9 +459,7 @@ class GroupsServerHandler(object):
 
         # TODO: If admin add lists of users whose attestations have timed out
 
-        defer.returnValue(
-            {"chunk": chunk, "total_user_count_estimate": len(user_results)}
-        )
+        return {"chunk": chunk, "total_user_count_estimate": len(user_results)}
 
     @defer.inlineCallbacks
     def get_invited_users_in_group(self, group_id, requester_user_id):
@@ -494,9 +490,7 @@ class GroupsServerHandler(object):
                 logger.warn("Error getting profile for %s: %s", user_id, e)
             user_profiles.append(user_profile)
 
-        defer.returnValue(
-            {"chunk": user_profiles, "total_user_count_estimate": len(invited_users)}
-        )
+        return {"chunk": user_profiles, "total_user_count_estimate": len(invited_users)}
 
     @defer.inlineCallbacks
     def get_rooms_in_group(self, group_id, requester_user_id):
@@ -533,9 +527,7 @@ class GroupsServerHandler(object):
 
         chunk.sort(key=lambda e: -e["num_joined_members"])
 
-        defer.returnValue(
-            {"chunk": chunk, "total_room_count_estimate": len(room_results)}
-        )
+        return {"chunk": chunk, "total_room_count_estimate": len(room_results)}
 
     @defer.inlineCallbacks
     def add_room_to_group(self, group_id, requester_user_id, room_id, content):
@@ -551,7 +543,7 @@ class GroupsServerHandler(object):
 
         yield self.store.add_room_to_group(group_id, room_id, is_public=is_public)
 
-        defer.returnValue({})
+        return {}
 
     @defer.inlineCallbacks
     def update_room_in_group(
@@ -574,7 +566,7 @@ class GroupsServerHandler(object):
         else:
             raise SynapseError(400, "Uknown config option")
 
-        defer.returnValue({})
+        return {}
 
     @defer.inlineCallbacks
     def remove_room_from_group(self, group_id, requester_user_id, room_id):
@@ -586,7 +578,7 @@ class GroupsServerHandler(object):
 
         yield self.store.remove_room_from_group(group_id, room_id)
 
-        defer.returnValue({})
+        return {}
 
     @defer.inlineCallbacks
     def invite_to_group(self, group_id, user_id, requester_user_id, content):
@@ -644,9 +636,9 @@ class GroupsServerHandler(object):
             )
         elif res["state"] == "invite":
             yield self.store.add_group_invite(group_id, user_id)
-            defer.returnValue({"state": "invite"})
+            return {"state": "invite"}
         elif res["state"] == "reject":
-            defer.returnValue({"state": "reject"})
+            return {"state": "reject"}
         else:
             raise SynapseError(502, "Unknown state returned by HS")
 
@@ -679,7 +671,7 @@ class GroupsServerHandler(object):
             remote_attestation=remote_attestation,
         )
 
-        defer.returnValue(local_attestation)
+        return local_attestation
 
     @defer.inlineCallbacks
     def accept_invite(self, group_id, requester_user_id, content):
@@ -699,7 +691,7 @@ class GroupsServerHandler(object):
 
         local_attestation = yield self._add_user(group_id, requester_user_id, content)
 
-        defer.returnValue({"state": "join", "attestation": local_attestation})
+        return {"state": "join", "attestation": local_attestation}
 
     @defer.inlineCallbacks
     def join_group(self, group_id, requester_user_id, content):
@@ -716,7 +708,7 @@ class GroupsServerHandler(object):
 
         local_attestation = yield self._add_user(group_id, requester_user_id, content)
 
-        defer.returnValue({"state": "join", "attestation": local_attestation})
+        return {"state": "join", "attestation": local_attestation}
 
     @defer.inlineCallbacks
     def knock(self, group_id, requester_user_id, content):
@@ -769,7 +761,7 @@ class GroupsServerHandler(object):
         if not self.hs.is_mine_id(user_id):
             yield self.store.maybe_delete_remote_profile_cache(user_id)
 
-        defer.returnValue({})
+        return {}
 
     @defer.inlineCallbacks
     def create_group(self, group_id, requester_user_id, content):
@@ -845,7 +837,7 @@ class GroupsServerHandler(object):
                 avatar_url=user_profile.get("avatar_url"),
             )
 
-        defer.returnValue({"group_id": group_id})
+        return {"group_id": group_id}
 
     @defer.inlineCallbacks
     def delete_group(self, group_id, requester_user_id):

synapse/handlers/account_data.py

@@ -51,8 +51,8 @@ class AccountDataEventSource(object):
                     {"type": account_data_type, "content": content, "room_id": room_id}
                 )
 
-        defer.returnValue((results, current_stream_id))
+        return (results, current_stream_id)
 
     @defer.inlineCallbacks
     def get_pagination_rows(self, user, config, key):
-        defer.returnValue(([], config.to_id))
+        return ([], config.to_id)

synapse/handlers/account_validity.py

@@ -193,7 +193,7 @@ class AccountValidityHandler(object):
             if threepid["medium"] == "email":
                 addresses.append(threepid["address"])
 
-        defer.returnValue(addresses)
+        return addresses
 
     @defer.inlineCallbacks
     def _get_renewal_token(self, user_id):
@@ -214,7 +214,7 @@ class AccountValidityHandler(object):
             try:
                 renewal_token = stringutils.random_string(32)
                 yield self.store.set_renewal_token_for_user(user_id, renewal_token)
-                defer.returnValue(renewal_token)
+                return renewal_token
             except StoreError:
                 attempts += 1
         raise StoreError(500, "Couldn't generate a unique string as refresh string.")
@@ -254,4 +254,4 @@ class AccountValidityHandler(object):
             user_id=user_id, expiration_ts=expiration_ts, email_sent=email_sent
         )
 
-        defer.returnValue(expiration_ts)
+        return expiration_ts

synapse/handlers/acme.py

@@ -100,4 +100,4 @@ class AcmeHandler(object):
             logger.exception("Failed saving!")
             raise
 
-        defer.returnValue(True)
+        return True

synapse/handlers/admin.py

@@ -49,7 +49,7 @@ class AdminHandler(BaseHandler):
             "devices": {"": {"sessions": [{"connections": connections}]}},
         }
 
-        defer.returnValue(ret)
+        return ret
 
     @defer.inlineCallbacks
     def get_users(self):
@@ -61,7 +61,7 @@ class AdminHandler(BaseHandler):
         """
         ret = yield self.store.get_users()
 
-        defer.returnValue(ret)
+        return ret
 
     @defer.inlineCallbacks
     def get_users_paginate(self, order, start, limit):
@@ -78,7 +78,7 @@ class AdminHandler(BaseHandler):
         """
         ret = yield self.store.get_users_paginate(order, start, limit)
 
-        defer.returnValue(ret)
+        return ret
 
     @defer.inlineCallbacks
     def search_users(self, term):
@@ -92,7 +92,7 @@ class AdminHandler(BaseHandler):
         """
         ret = yield self.store.search_users(term)
 
-        defer.returnValue(ret)
+        return ret
 
     @defer.inlineCallbacks
     def export_user_data(self, user_id, writer):
@@ -225,7 +225,7 @@ class AdminHandler(BaseHandler):
                 state = yield self.store.get_state_for_event(event_id)
                 writer.write_state(room_id, event_id, state)
 
-        defer.returnValue(writer.finished())
+        return writer.finished()
 
 
 class ExfiltrationWriter(object):

synapse/handlers/appservice.py

@@ -167,8 +167,8 @@ class ApplicationServicesHandler(object):
         for user_service in user_query_services:
             is_known_user = yield self.appservice_api.query_user(user_service, user_id)
             if is_known_user:
-                defer.returnValue(True)
-        defer.returnValue(False)
+                return True
+        return False
 
     @defer.inlineCallbacks
     def query_room_alias_exists(self, room_alias):
@@ -192,7 +192,7 @@ class ApplicationServicesHandler(object):
             if is_known_alias:
                 # the alias exists now so don't query more ASes.
                 result = yield self.store.get_association_from_room_alias(room_alias)
-                defer.returnValue(result)
+                return result
 
     @defer.inlineCallbacks
     def query_3pe(self, kind, protocol, fields):
@@ -215,7 +215,7 @@ class ApplicationServicesHandler(object):
             if success:
                 ret.extend(result)
 
-        defer.returnValue(ret)
+        return ret
 
     @defer.inlineCallbacks
     def get_3pe_protocols(self, only_protocol=None):
@@ -254,7 +254,7 @@ class ApplicationServicesHandler(object):
         for p in protocols.keys():
             protocols[p] = _merge_instances(protocols[p])
 
-        defer.returnValue(protocols)
+        return protocols
 
     @defer.inlineCallbacks
     def _get_services_for_event(self, event):
@@ -276,7 +276,7 @@ class ApplicationServicesHandler(object):
             if (yield s.is_interested(event, self.store)):
                 interested_list.append(s)
 
-        defer.returnValue(interested_list)
+        return interested_list
 
     def _get_services_for_user(self, user_id):
         services = self.store.get_app_services()
@@ -293,23 +293,23 @@ class ApplicationServicesHandler(object):
         if not self.is_mine_id(user_id):
             # we don't know if they are unknown or not since it isn't one of our
             # users. We can't poke ASes.
-            defer.returnValue(False)
+            return False
             return
 
         user_info = yield self.store.get_user_by_id(user_id)
         if user_info:
-            defer.returnValue(False)
+            return False
             return
 
         # user not found; could be the AS though, so check.
         services = self.store.get_app_services()
         service_list = [s for s in services if s.sender == user_id]
-        defer.returnValue(len(service_list) == 0)
+        return len(service_list) == 0
 
     @defer.inlineCallbacks
     def _check_user_exists(self, user_id):
         unknown_user = yield self._is_unknown_user(user_id)
         if unknown_user:
             exists = yield self.query_user_exists(user_id)
-            defer.returnValue(exists)
-        defer.returnValue(True)
+            return exists
+        return True

synapse/handlers/auth.py

@@ -155,7 +155,7 @@ class AuthHandler(BaseHandler):
         if user_id != requester.user.to_string():
             raise AuthError(403, "Invalid auth")
 
-        defer.returnValue(params)
+        return params
 
     @defer.inlineCallbacks
     def check_auth(self, flows, clientdict, clientip, password_servlet=False):
@@ -280,7 +280,7 @@ class AuthHandler(BaseHandler):
                     creds,
                     list(clientdict),
                 )
-                defer.returnValue((creds, clientdict, session["id"]))
+                return (creds, clientdict, session["id"])
 
         ret = self._auth_dict_for_flows(flows, session)
         ret["completed"] = list(creds)
@@ -307,8 +307,8 @@ class AuthHandler(BaseHandler):
         if result:
             creds[stagetype] = result
             self._save_session(sess)
-            defer.returnValue(True)
-        defer.returnValue(False)
+            return True
+        return False
 
     def get_session_id(self, clientdict):
         """
@@ -379,7 +379,7 @@ class AuthHandler(BaseHandler):
             res = yield checker(
                 authdict, clientip=clientip, password_servlet=password_servlet
             )
-            defer.returnValue(res)
+            return res
 
         # build a v1-login-style dict out of the authdict and fall back to the
         # v1 code
@@ -389,7 +389,7 @@ class AuthHandler(BaseHandler):
             raise SynapseError(400, "", Codes.MISSING_PARAM)
 
         (canonical_id, callback) = yield self.validate_login(user_id, authdict)
-        defer.returnValue(canonical_id)
+        return canonical_id
 
     @defer.inlineCallbacks
     def _check_recaptcha(self, authdict, clientip, **kwargs):
@@ -433,7 +433,7 @@ class AuthHandler(BaseHandler):
                 resp_body.get("hostname"),
             )
             if resp_body["success"]:
-                defer.returnValue(True)
+                return True
         raise LoginError(401, "", errcode=Codes.UNAUTHORIZED)
 
     def _check_email_identity(self, authdict, **kwargs):
@@ -502,7 +502,7 @@ class AuthHandler(BaseHandler):
 
         threepid["threepid_creds"] = authdict["threepid_creds"]
 
-        defer.returnValue(threepid)
+        return threepid
 
     def _get_params_recaptcha(self):
         return {"public_key": self.hs.config.recaptcha_public_key}
@@ -606,7 +606,7 @@ class AuthHandler(BaseHandler):
                 yield self.store.delete_access_token(access_token)
                 raise StoreError(400, "Login raced against device deletion")
 
-        defer.returnValue(access_token)
+        return access_token
 
     @defer.inlineCallbacks
     def check_user_exists(self, user_id):
@@ -629,8 +629,8 @@ class AuthHandler(BaseHandler):
         self.ratelimit_login_per_account(user_id)
         res = yield self._find_user_id_and_pwd_hash(user_id)
         if res is not None:
-            defer.returnValue(res[0])
-        defer.returnValue(None)
+            return res[0]
+        return None
 
     @defer.inlineCallbacks
     def _find_user_id_and_pwd_hash(self, user_id):
@@ -661,7 +661,7 @@ class AuthHandler(BaseHandler):
                 user_id,
                 user_infos.keys(),
             )
-        defer.returnValue(result)
+        return result
 
     def get_supported_login_types(self):
         """Get a the login types supported for the /login API
@@ -722,7 +722,7 @@ class AuthHandler(BaseHandler):
                 known_login_type = True
                 is_valid = yield provider.check_password(qualified_user_id, password)
                 if is_valid:
-                    defer.returnValue((qualified_user_id, None))
+                    return (qualified_user_id, None)
 
             if not hasattr(provider, "get_supported_login_types") or not hasattr(
                 provider, "check_auth"
@@ -756,7 +756,7 @@ class AuthHandler(BaseHandler):
             if result:
                 if isinstance(result, str):
                     result = (result, None)
-                defer.returnValue(result)
+                return result
 
         if login_type == LoginType.PASSWORD and self.hs.config.password_localdb_enabled:
             known_login_type = True
@@ -766,7 +766,7 @@ class AuthHandler(BaseHandler):
             )
 
             if canonical_user_id:
-                defer.returnValue((canonical_user_id, None))
+                return (canonical_user_id, None)
 
         if not known_login_type:
             raise SynapseError(400, "Unknown login type %s" % login_type)
@@ -814,9 +814,9 @@ class AuthHandler(BaseHandler):
                     if isinstance(result, str):
                         # If it's a str, set callback function to None
                         result = (result, None)
-                    defer.returnValue(result)
+                    return result
 
-        defer.returnValue((None, None))
+        return (None, None)
 
     @defer.inlineCallbacks
     def _check_local_password(self, user_id, password):
@@ -838,7 +838,7 @@ class AuthHandler(BaseHandler):
         """
         lookupres = yield self._find_user_id_and_pwd_hash(user_id)
         if not lookupres:
-            defer.returnValue(None)
+            return None
         (user_id, password_hash) = lookupres
 
         # If the password hash is None, the account has likely been deactivated
@@ -850,8 +850,8 @@ class AuthHandler(BaseHandler):
         result = yield self.validate_hash(password, password_hash)
         if not result:
             logger.warn("Failed password login for user %s", user_id)
-            defer.returnValue(None)
-        defer.returnValue(user_id)
+            return None
+        return user_id
 
     @defer.inlineCallbacks
     def validate_short_term_login_token_and_get_user_id(self, login_token):
@@ -865,7 +865,7 @@ class AuthHandler(BaseHandler):
             raise AuthError(403, "Invalid token", errcode=Codes.FORBIDDEN)
         self.ratelimit_login_per_account(user_id)
         yield self.auth.check_auth_blocking(user_id)
-        defer.returnValue(user_id)
+        return user_id
 
     @defer.inlineCallbacks
     def delete_access_token(self, access_token):
@@ -976,7 +976,7 @@ class AuthHandler(BaseHandler):
         )
 
         yield self.store.user_delete_threepid(user_id, medium, address)
-        defer.returnValue(result)
+        return result
 
     def _save_session(self, session):
         # TODO: Persistent storage

synapse/handlers/deactivate_account.py

@@ -125,7 +125,7 @@ class DeactivateAccountHandler(BaseHandler):
         # Mark the user as deactivated.
         yield self.store.set_user_deactivated_status(user_id, True)
 
-        defer.returnValue(identity_server_supports_unbinding)
+        return identity_server_supports_unbinding
 
     def _start_user_parting(self):
         """

synapse/handlers/device.py

@@ -64,7 +64,7 @@ class DeviceWorkerHandler(BaseHandler):
         for device in devices:
             _update_device_from_client_ips(device, ips)
 
-        defer.returnValue(devices)
+        return devices
 
     @defer.inlineCallbacks
     def get_device(self, user_id, device_id):
@@ -85,7 +85,7 @@ class DeviceWorkerHandler(BaseHandler):
             raise errors.NotFoundError
         ips = yield self.store.get_last_client_ip_by_device(user_id, device_id)
         _update_device_from_client_ips(device, ips)
-        defer.returnValue(device)
+        return device
 
     @measure_func("device.get_user_ids_changed")
     @defer.inlineCallbacks
@@ -200,9 +200,7 @@ class DeviceWorkerHandler(BaseHandler):
             possibly_joined = []
             possibly_left = []
 
-        defer.returnValue(
-            {"changed": list(possibly_joined), "left": list(possibly_left)}
-        )
+        return {"changed": list(possibly_joined), "left": list(possibly_left)}
 
 
 class DeviceHandler(DeviceWorkerHandler):
@@ -250,7 +248,7 @@ class DeviceHandler(DeviceWorkerHandler):
             )
             if new_device:
                 yield self.notify_device_update(user_id, [device_id])
-            defer.returnValue(device_id)
+            return device_id
 
         # if the device id is not specified, we'll autogen one, but loop a few
         # times in case of a clash.
@@ -264,7 +262,7 @@ class DeviceHandler(DeviceWorkerHandler):
             )
             if new_device:
                 yield self.notify_device_update(user_id, [device_id])
-                defer.returnValue(device_id)
+                return device_id
             attempts += 1
 
         raise errors.StoreError(500, "Couldn't generate a device ID.")
@@ -411,9 +409,7 @@ class DeviceHandler(DeviceWorkerHandler):
     @defer.inlineCallbacks
     def on_federation_query_user_devices(self, user_id):
         stream_id, devices = yield self.store.get_devices_with_keys_by_user(user_id)
-        defer.returnValue(
-            {"user_id": user_id, "stream_id": stream_id, "devices": devices}
-        )
+        return {"user_id": user_id, "stream_id": stream_id, "devices": devices}
 
     @defer.inlineCallbacks
     def user_left_room(self, user, room_id):
@@ -623,7 +619,7 @@ class DeviceListEduUpdater(object):
         for _, stream_id, prev_ids, _ in updates:
             if not prev_ids:
                 # We always do a resync if there are no previous IDs
-                defer.returnValue(True)
+                return True
 
             for prev_id in prev_ids:
                 if prev_id == extremity:
@@ -633,8 +629,8 @@ class DeviceListEduUpdater(object):
                 elif prev_id in stream_id_in_updates:
                     continue
                 else:
-                    defer.returnValue(True)
+                    return True
 
             stream_id_in_updates.add(stream_id)
 
-        defer.returnValue(False)
+        return False

synapse/handlers/directory.py

@@ -210,7 +210,7 @@ class DirectoryHandler(BaseHandler):
         except AuthError as e:
             logger.info("Failed to update alias events: %s", e)
 
-        defer.returnValue(room_id)
+        return room_id
 
     @defer.inlineCallbacks
     def delete_appservice_association(self, service, room_alias):
@@ -229,7 +229,7 @@ class DirectoryHandler(BaseHandler):
 
         room_id = yield self.store.delete_room_alias(room_alias)
 
-        defer.returnValue(room_id)
+        return room_id
 
     @defer.inlineCallbacks
     def get_association(self, room_alias):
@@ -277,7 +277,7 @@ class DirectoryHandler(BaseHandler):
         else:
             servers = list(servers)
 
-        defer.returnValue({"room_id": room_id, "servers": servers})
+        return {"room_id": room_id, "servers": servers}
         return
 
     @defer.inlineCallbacks
@@ -289,7 +289,7 @@ class DirectoryHandler(BaseHandler):
         result = yield self.get_association_from_room_alias(room_alias)
 
         if result is not None:
-            defer.returnValue({"room_id": result.room_id, "servers": result.servers})
+            return {"room_id": result.room_id, "servers": result.servers}
         else:
             raise SynapseError(
                 404,
@@ -342,7 +342,7 @@ class DirectoryHandler(BaseHandler):
             # Query AS to see if it exists
             as_handler = self.appservice_handler
             result = yield as_handler.query_room_alias_exists(room_alias)
-        defer.returnValue(result)
+        return result
 
     def can_modify_alias(self, alias, user_id=None):
         # Any application service "interested" in an alias they are regexing on
@@ -369,10 +369,10 @@ class DirectoryHandler(BaseHandler):
         creator = yield self.store.get_room_alias_creator(alias.to_string())
 
         if creator is not None and creator == user_id:
-            defer.returnValue(True)
+            return True
 
         is_admin = yield self.auth.is_server_admin(UserID.from_string(user_id))
-        defer.returnValue(is_admin)
+        return is_admin
 
     @defer.inlineCallbacks
     def edit_published_room_list(self, requester, room_id, visibility):

synapse/handlers/e2e_keys.py

@@ -144,7 +144,7 @@ class E2eKeysHandler(object):
             )
         )
 
-        defer.returnValue({"device_keys": results, "failures": failures})
+        return {"device_keys": results, "failures": failures}
 
     @defer.inlineCallbacks
     def query_local_devices(self, query):
@@ -189,7 +189,7 @@ class E2eKeysHandler(object):
                     r["unsigned"]["device_display_name"] = display_name
                 result_dict[user_id][device_id] = r
 
-        defer.returnValue(result_dict)
+        return result_dict
 
     @defer.inlineCallbacks
     def on_federation_query_client_keys(self, query_body):
@@ -197,7 +197,7 @@ class E2eKeysHandler(object):
         """
         device_keys_query = query_body.get("device_keys", {})
         res = yield self.query_local_devices(device_keys_query)
-        defer.returnValue({"device_keys": res})
+        return {"device_keys": res}
 
     @defer.inlineCallbacks
     def claim_one_time_keys(self, query, timeout):
@@ -259,7 +259,7 @@ class E2eKeysHandler(object):
             ),
         )
 
-        defer.returnValue({"one_time_keys": json_result, "failures": failures})
+        return {"one_time_keys": json_result, "failures": failures}
 
     @defer.inlineCallbacks
     def upload_keys_for_user(self, user_id, device_id, keys):
@@ -297,7 +297,7 @@ class E2eKeysHandler(object):
 
         result = yield self.store.count_e2e_one_time_keys(user_id, device_id)
 
-        defer.returnValue({"one_time_key_counts": result})
+        return {"one_time_key_counts": result}
 
     @defer.inlineCallbacks
     def _upload_one_time_keys_for_user(

synapse/handlers/e2e_room_keys.py

@@ -84,7 +84,7 @@ class E2eRoomKeysHandler(object):
                 user_id, version, room_id, session_id
             )
 
-            defer.returnValue(results)
+            return results
 
     @defer.inlineCallbacks
     def delete_room_keys(self, user_id, version, room_id=None, session_id=None):
@@ -262,7 +262,7 @@ class E2eRoomKeysHandler(object):
             new_version = yield self.store.create_e2e_room_keys_version(
                 user_id, version_info
             )
-            defer.returnValue(new_version)
+            return new_version
 
     @defer.inlineCallbacks
     def get_version_info(self, user_id, version=None):
@@ -292,7 +292,7 @@ class E2eRoomKeysHandler(object):
                     raise NotFoundError("Unknown backup version")
                 else:
                     raise
-            defer.returnValue(res)
+            return res
 
     @defer.inlineCallbacks
     def delete_version(self, user_id, version=None):
@@ -350,4 +350,4 @@ class E2eRoomKeysHandler(object):
                 user_id, version, version_info
             )
 
-            defer.returnValue({})
+            return {}

synapse/handlers/events.py

@@ -143,7 +143,7 @@ class EventStreamHandler(BaseHandler):
                 "end": tokens[1].to_string(),
             }
 
-            defer.returnValue(chunk)
+            return chunk
 
 
 class EventHandler(BaseHandler):
@@ -166,7 +166,7 @@ class EventHandler(BaseHandler):
         event = yield self.store.get_event(event_id, check_room_id=room_id)
 
         if not event:
-            defer.returnValue(None)
+            return None
             return
 
         users = yield self.store.get_users_in_room(event.room_id)
@@ -179,4 +179,4 @@ class EventHandler(BaseHandler):
         if not filtered:
             raise AuthError(403, "You don't have permission to access that event.")
 
-        defer.returnValue(event)
+        return event

synapse/handlers/federation.py

@@ -210,7 +210,7 @@ class FederationHandler(BaseHandler):
                 event_id,
                 origin,
             )
-            defer.returnValue(None)
+            return None
 
         state = None
         auth_chain = []
@@ -676,7 +676,7 @@ class FederationHandler(BaseHandler):
         events = [e for e in events if e.event_id not in seen_events]
 
         if not events:
-            defer.returnValue([])
+            return []
 
         event_map = {e.event_id: e for e in events}
 
@@ -838,7 +838,7 @@ class FederationHandler(BaseHandler):
             # TODO: We can probably do something more clever here.
             yield self._handle_new_event(dest, event, backfilled=True)
 
-        defer.returnValue(events)
+        return events
 
     @defer.inlineCallbacks
     def maybe_backfill(self, room_id, current_depth):
@@ -894,7 +894,7 @@ class FederationHandler(BaseHandler):
         )
 
         if not filtered_extremities:
-            defer.returnValue(False)
+            return False
 
         # Check if we reached a point where we should start backfilling.
         sorted_extremeties_tuple = sorted(extremities.items(), key=lambda e: -int(e[1]))
@@ -965,7 +965,7 @@ class FederationHandler(BaseHandler):
                     # If this succeeded then we probably already have the
                     # appropriate stuff.
                     # TODO: We can probably do something more intelligent here.
-                    defer.returnValue(True)
+                    return True
                 except SynapseError as e:
                     logger.info("Failed to backfill from %s because %s", dom, e)
                     continue
@@ -985,11 +985,11 @@ class FederationHandler(BaseHandler):
                     logger.exception("Failed to backfill from %s because %s", dom, e)
                     continue
 
-            defer.returnValue(False)
+            return False
 
         success = yield try_backfill(likely_domains)
         if success:
-            defer.returnValue(True)
+            return True
 
         # Huh, well *those* domains didn't work out. Lets try some domains
         # from the time.
@@ -1031,11 +1031,11 @@ class FederationHandler(BaseHandler):
                 [dom for dom, _ in likely_domains if dom not in tried_domains]
             )
             if success:
-                defer.returnValue(True)
+                return True
 
             tried_domains.update(dom for dom, _ in likely_domains)
 
-        defer.returnValue(False)
+        return False
 
     def _sanity_check_event(self, ev):
         """
@@ -1082,7 +1082,7 @@ class FederationHandler(BaseHandler):
             pdu=event,
         )
 
-        defer.returnValue(pdu)
+        return pdu
 
     @defer.inlineCallbacks
     def on_event_auth(self, event_id):
@@ -1090,7 +1090,7 @@ class FederationHandler(BaseHandler):
         auth = yield self.store.get_auth_chain(
             [auth_id for auth_id in event.auth_event_ids()], include_given=True
         )
-        defer.returnValue([e for e in auth])
+        return [e for e in auth]
 
     @log_function
     @defer.inlineCallbacks
@@ -1177,7 +1177,7 @@ class FederationHandler(BaseHandler):
 
             run_in_background(self._handle_queued_pdus, room_queue)
 
-        defer.returnValue(True)
+        return True
 
     @defer.inlineCallbacks
     def _handle_queued_pdus(self, room_queue):
@@ -1247,7 +1247,7 @@ class FederationHandler(BaseHandler):
             room_version, event, context, do_sig_check=False
         )
 
-        defer.returnValue(event)
+        return event
 
     @defer.inlineCallbacks
     @log_function
@@ -1308,7 +1308,7 @@ class FederationHandler(BaseHandler):
 
         state = yield self.store.get_events(list(prev_state_ids.values()))
 
-        defer.returnValue({"state": list(state.values()), "auth_chain": auth_chain})
+        return {"state": list(state.values()), "auth_chain": auth_chain}
 
     @defer.inlineCallbacks
     def on_invite_request(self, origin, pdu):
@@ -1364,7 +1364,7 @@ class FederationHandler(BaseHandler):
         context = yield self.state_handler.compute_event_context(event)
         yield self.persist_events_and_notify([(event, context)])
 
-        defer.returnValue(event)
+        return event
 
     @defer.inlineCallbacks
     def do_remotely_reject_invite(self, target_hosts, room_id, user_id):
@@ -1389,7 +1389,7 @@ class FederationHandler(BaseHandler):
         context = yield self.state_handler.compute_event_context(event)
         yield self.persist_events_and_notify([(event, context)])
 
-        defer.returnValue(event)
+        return event
 
     @defer.inlineCallbacks
     def _make_and_verify_event(
@@ -1407,7 +1407,7 @@ class FederationHandler(BaseHandler):
         assert event.user_id == user_id
         assert event.state_key == user_id
         assert event.room_id == room_id
-        defer.returnValue((origin, event, format_ver))
+        return (origin, event, format_ver)
 
     @defer.inlineCallbacks
     @log_function
@@ -1451,7 +1451,7 @@ class FederationHandler(BaseHandler):
             logger.warn("Failed to create new leave %r because %s", event, e)
             raise e
 
-        defer.returnValue(event)
+        return event
 
     @defer.inlineCallbacks
     @log_function
@@ -1484,7 +1484,7 @@ class FederationHandler(BaseHandler):
             event.signatures,
         )
 
-        defer.returnValue(None)
+        return None
 
     @defer.inlineCallbacks
     def get_state_for_pdu(self, room_id, event_id):
@@ -1512,9 +1512,9 @@ class FederationHandler(BaseHandler):
                     del results[(event.type, event.state_key)]
 
             res = list(results.values())
-            defer.returnValue(res)
+            return res
         else:
-            defer.returnValue([])
+            return []
 
     @defer.inlineCallbacks
     def get_state_ids_for_pdu(self, room_id, event_id):
@@ -1539,9 +1539,9 @@ class FederationHandler(BaseHandler):
                 else:
                     results.pop((event.type, event.state_key), None)
 
-            defer.returnValue(list(results.values()))
+            return list(results.values())
         else:
-            defer.returnValue([])
+            return []
 
     @defer.inlineCallbacks
     @log_function
@@ -1554,7 +1554,7 @@ class FederationHandler(BaseHandler):
 
         events = yield filter_events_for_server(self.store, origin, events)
 
-        defer.returnValue(events)
+        return events
 
     @defer.inlineCallbacks
     @log_function
@@ -1584,9 +1584,9 @@ class FederationHandler(BaseHandler):
 
             events = yield filter_events_for_server(self.store, origin, [event])
             event = events[0]
-            defer.returnValue(event)
+            return event
         else:
-            defer.returnValue(None)
+            return None
 
     def get_min_depth_for_context(self, context):
         return self.store.get_min_depth(context)
@@ -1618,7 +1618,7 @@ class FederationHandler(BaseHandler):
                     self.store.remove_push_actions_from_staging, event.event_id
                 )
 
-        defer.returnValue(context)
+        return context
 
     @defer.inlineCallbacks
     def _handle_new_events(self, origin, event_infos, backfilled=False):
@@ -1641,7 +1641,7 @@ class FederationHandler(BaseHandler):
                     auth_events=ev_info.get("auth_events"),
                     backfilled=backfilled,
                 )
-            defer.returnValue(res)
+            return res
 
         contexts = yield make_deferred_yieldable(
             defer.gatherResults(
@@ -1800,7 +1800,7 @@ class FederationHandler(BaseHandler):
         if event.type == EventTypes.GuestAccess and not context.rejected:
             yield self.maybe_kick_guest_users(event)
 
-        defer.returnValue(context)
+        return context
 
     @defer.inlineCallbacks
     def _check_for_soft_fail(self, event, state, backfilled):
@@ -1919,7 +1919,7 @@ class FederationHandler(BaseHandler):
 
         logger.debug("on_query_auth returning: %s", ret)
 
-        defer.returnValue(ret)
+        return ret
 
     @defer.inlineCallbacks
     def on_get_missing_events(
@@ -1942,7 +1942,7 @@ class FederationHandler(BaseHandler):
             self.store, origin, missing_events
         )
 
-        defer.returnValue(missing_events)
+        return missing_events
 
     @defer.inlineCallbacks
     @log_function
@@ -2418,16 +2418,14 @@ class FederationHandler(BaseHandler):
 
         logger.debug("construct_auth_difference returning")
 
-        defer.returnValue(
-            {
-                "auth_chain": local_auth,
-                "rejects": {
-                    e.event_id: {"reason": reason_map[e.event_id], "proof": None}
-                    for e in base_remote_rejected
-                },
-                "missing": [e.event_id for e in missing_locals],
-            }
-        )
+        return {
+            "auth_chain": local_auth,
+            "rejects": {
+                e.event_id: {"reason": reason_map[e.event_id], "proof": None}
+                for e in base_remote_rejected
+            },
+            "missing": [e.event_id for e in missing_locals],
+        }
 
     @defer.inlineCallbacks
     @log_function
@@ -2575,7 +2573,7 @@ class FederationHandler(BaseHandler):
             builder=builder
         )
         EventValidator().validate_new(event)
-        defer.returnValue((event, context))
+        return (event, context)
 
     @defer.inlineCallbacks
     def _check_signature(self, event, context):

synapse/handlers/groups_local.py

@@ -162,7 +162,7 @@ class GroupsLocalHandler(object):
 
         res.setdefault("user", {})["is_publicised"] = is_publicised
 
-        defer.returnValue(res)
+        return res
 
     @defer.inlineCallbacks
     def create_group(self, group_id, user_id, content):
@@ -207,7 +207,7 @@ class GroupsLocalHandler(object):
         )
         self.notifier.on_new_event("groups_key", token, users=[user_id])
 
-        defer.returnValue(res)
+        return res
 
     @defer.inlineCallbacks
     def get_users_in_group(self, group_id, requester_user_id):
@@ -217,7 +217,7 @@ class GroupsLocalHandler(object):
             res = yield self.groups_server_handler.get_users_in_group(
                 group_id, requester_user_id
             )
-            defer.returnValue(res)
+            return res
 
         group_server_name = get_domain_from_id(group_id)
 
@@ -244,7 +244,7 @@ class GroupsLocalHandler(object):
 
         res["chunk"] = valid_entries
 
-        defer.returnValue(res)
+        return res
 
     @defer.inlineCallbacks
     def join_group(self, group_id, user_id, content):
@@ -285,7 +285,7 @@ class GroupsLocalHandler(object):
         )
         self.notifier.on_new_event("groups_key", token, users=[user_id])
 
-        defer.returnValue({})
+        return {}
 
     @defer.inlineCallbacks
     def accept_invite(self, group_id, user_id, content):
@@ -326,7 +326,7 @@ class GroupsLocalHandler(object):
         )
         self.notifier.on_new_event("groups_key", token, users=[user_id])
 
-        defer.returnValue({})
+        return {}
 
     @defer.inlineCallbacks
     def invite(self, group_id, user_id, requester_user_id, config):
@@ -346,7 +346,7 @@ class GroupsLocalHandler(object):
                 content,
             )
 
-        defer.returnValue(res)
+        return res
 
     @defer.inlineCallbacks
     def on_invite(self, group_id, user_id, content):
@@ -377,7 +377,7 @@ class GroupsLocalHandler(object):
             logger.warn("No profile for user %s: %s", user_id, e)
             user_profile = {}
 
-        defer.returnValue({"state": "invite", "user_profile": user_profile})
+        return {"state": "invite", "user_profile": user_profile}
 
     @defer.inlineCallbacks
     def remove_user_from_group(self, group_id, user_id, requester_user_id, content):
@@ -406,7 +406,7 @@ class GroupsLocalHandler(object):
                 content,
             )
 
-        defer.returnValue(res)
+        return res
 
     @defer.inlineCallbacks
     def user_removed_from_group(self, group_id, user_id, content):
@@ -421,7 +421,7 @@ class GroupsLocalHandler(object):
     @defer.inlineCallbacks
     def get_joined_groups(self, user_id):
         group_ids = yield self.store.get_joined_groups(user_id)
-        defer.returnValue({"groups": group_ids})
+        return {"groups": group_ids}
 
     @defer.inlineCallbacks
     def get_publicised_groups_for_user(self, user_id):
@@ -433,14 +433,14 @@ class GroupsLocalHandler(object):
             for app_service in self.store.get_app_services():
                 result.extend(app_service.get_groups_for_user(user_id))
 
-            defer.returnValue({"groups": result})
+            return {"groups": result}
         else:
             bulk_result = yield self.transport_client.bulk_get_publicised_groups(
                 get_domain_from_id(user_id), [user_id]
             )
             result = bulk_result.get("users", {}).get(user_id)
             # TODO: Verify attestations
-            defer.returnValue({"groups": result})
+            return {"groups": result}
 
     @defer.inlineCallbacks
     def bulk_get_publicised_groups(self, user_ids, proxy=True):
@@ -475,4 +475,4 @@ class GroupsLocalHandler(object):
             for app_service in self.store.get_app_services():
                 results[uid].extend(app_service.get_groups_for_user(uid))
 
-        defer.returnValue({"users": results})
+        return {"users": results}

synapse/handlers/identity.py

@@ -82,7 +82,7 @@ class IdentityHandler(BaseHandler):
                 "%s is not a trusted ID server: rejecting 3pid " + "credentials",
                 id_server,
             )
-            defer.returnValue(None)
+            return None
 
         try:
             data = yield self.http_client.get_json(
@@ -95,8 +95,8 @@ class IdentityHandler(BaseHandler):
             raise e.to_synapse_error()
 
         if "medium" in data:
-            defer.returnValue(data)
-        defer.returnValue(None)
+            return data
+        return None
 
     @defer.inlineCallbacks
     def bind_threepid(self, creds, mxid):
@@ -133,7 +133,7 @@ class IdentityHandler(BaseHandler):
             )
         except CodeMessageException as e:
             data = json.loads(e.msg)  # XXX WAT?
-        defer.returnValue(data)
+        return data
 
     @defer.inlineCallbacks
     def try_unbind_threepid(self, mxid, threepid):
@@ -161,7 +161,7 @@ class IdentityHandler(BaseHandler):
 
         # We don't know where to unbind, so we don't have a choice but to return
         if not id_servers:
-            defer.returnValue(False)
+            return False
 
         changed = True
         for id_server in id_servers:
@@ -169,7 +169,7 @@ class IdentityHandler(BaseHandler):
                 mxid, threepid, id_server
             )
 
-        defer.returnValue(changed)
+        return changed
 
     @defer.inlineCallbacks
     def try_unbind_threepid_with_id_server(self, mxid, threepid, id_server):
@@ -224,7 +224,7 @@ class IdentityHandler(BaseHandler):
             id_server=id_server,
         )
 
-        defer.returnValue(changed)
+        return changed
 
     @defer.inlineCallbacks
     def requestEmailToken(
@@ -250,7 +250,7 @@ class IdentityHandler(BaseHandler):
                 % (id_server, "/_matrix/identity/api/v1/validate/email/requestToken"),
                 params,
             )
-            defer.returnValue(data)
+            return data
         except HttpResponseException as e:
             logger.info("Proxied requestToken failed: %r", e)
             raise e.to_synapse_error()
@@ -278,7 +278,7 @@ class IdentityHandler(BaseHandler):
                 % (id_server, "/_matrix/identity/api/v1/validate/msisdn/requestToken"),
                 params,
             )
-            defer.returnValue(data)
+            return data
         except HttpResponseException as e:
             logger.info("Proxied requestToken failed: %r", e)
             raise e.to_synapse_error()

synapse/handlers/initial_sync.py

@@ -250,7 +250,7 @@ class InitialSyncHandler(BaseHandler):
             "end": now_token.to_string(),
         }
 
-        defer.returnValue(ret)
+        return ret
 
     @defer.inlineCallbacks
     def room_initial_sync(self, requester, room_id, pagin_config=None):
@@ -301,7 +301,7 @@ class InitialSyncHandler(BaseHandler):
 
         result["account_data"] = account_data_events
 
-        defer.returnValue(result)
+        return result
 
     @defer.inlineCallbacks
     def _room_initial_sync_parted(
@@ -330,28 +330,24 @@ class InitialSyncHandler(BaseHandler):
 
         time_now = self.clock.time_msec()
 
-        defer.returnValue(
-            {
-                "membership": membership,
-                "room_id": room_id,
-                "messages": {
-                    "chunk": (
-                        yield self._event_serializer.serialize_events(
-                            messages, time_now
-                        )
-                    ),
-                    "start": start_token.to_string(),
-                    "end": end_token.to_string(),
-                },
-                "state": (
-                    yield self._event_serializer.serialize_events(
-                        room_state.values(), time_now
-                    )
+        return {
+            "membership": membership,
+            "room_id": room_id,
+            "messages": {
+                "chunk": (
+                    yield self._event_serializer.serialize_events(messages, time_now)
                 ),
-                "presence": [],
-                "receipts": [],
-            }
-        )
+                "start": start_token.to_string(),
+                "end": end_token.to_string(),
+            },
+            "state": (
+                yield self._event_serializer.serialize_events(
+                    room_state.values(), time_now
+                )
+            ),
+            "presence": [],
+            "receipts": [],
+        }
 
     @defer.inlineCallbacks
     def _room_initial_sync_joined(
@@ -384,13 +380,13 @@ class InitialSyncHandler(BaseHandler):
         def get_presence():
             # If presence is disabled, return an empty list
             if not self.hs.config.use_presence:
-                defer.returnValue([])
+                return []
 
             states = yield presence_handler.get_states(
                 [m.user_id for m in room_members], as_event=True
             )
 
-            defer.returnValue(states)
+            return states
 
         @defer.inlineCallbacks
         def get_receipts():
@@ -399,7 +395,7 @@ class InitialSyncHandler(BaseHandler):
             )
             if not receipts:
                 receipts = []
-            defer.returnValue(receipts)
+            return receipts
 
         presence, receipts, (messages, token) = yield make_deferred_yieldable(
             defer.gatherResults(
@@ -442,7 +438,7 @@ class InitialSyncHandler(BaseHandler):
         if not is_peeking:
             ret["membership"] = membership
 
-        defer.returnValue(ret)
+        return ret
 
     @defer.inlineCallbacks
     def _check_in_room_or_world_readable(self, room_id, user_id):
@@ -453,7 +449,7 @@ class InitialSyncHandler(BaseHandler):
             #  * The user is a guest user, and has joined the room
             # else it will throw.
             member_event = yield self.auth.check_user_was_in_room(room_id, user_id)
-            defer.returnValue((member_event.membership, member_event.event_id))
+            return (member_event.membership, member_event.event_id)
             return
         except AuthError:
             visibility = yield self.state_handler.get_current_state(
@@ -463,7 +459,7 @@ class InitialSyncHandler(BaseHandler):
                 visibility
                 and visibility.content["history_visibility"] == "world_readable"
             ):
-                defer.returnValue((Membership.JOIN, None))
+                return (Membership.JOIN, None)
                 return
             raise AuthError(
                 403, "Guest access not allowed", errcode=Codes.GUEST_ACCESS_FORBIDDEN

synapse/handlers/message.py

@@ -87,7 +87,7 @@ class MessageHandler(object):
             )
             data = room_state[membership_event_id].get(key)
 
-        defer.returnValue(data)
+        return data
 
     @defer.inlineCallbacks
     def get_state_events(
@@ -174,7 +174,7 @@ class MessageHandler(object):
             # events, as clients won't use them.
             bundle_aggregations=False,
         )
-        defer.returnValue(events)
+        return events
 
     @defer.inlineCallbacks
     def get_joined_members(self, requester, room_id):
@@ -213,15 +213,13 @@ class MessageHandler(object):
                 # Loop fell through, AS has no interested users in room
                 raise AuthError(403, "Appservice not in room")
 
-        defer.returnValue(
-            {
-                user_id: {
-                    "avatar_url": profile.avatar_url,
-                    "display_name": profile.display_name,
-                }
-                for user_id, profile in iteritems(users_with_profile)
+        return {
+            user_id: {
+                "avatar_url": profile.avatar_url,
+                "display_name": profile.display_name,
             }
-        )
+            for user_id, profile in iteritems(users_with_profile)
+        }
 
 
 class EventCreationHandler(object):
@@ -398,7 +396,7 @@ class EventCreationHandler(object):
 
         self.validator.validate_new(event)
 
-        defer.returnValue((event, context))
+        return (event, context)
 
     def _is_exempt_from_privacy_policy(self, builder, requester):
         """"Determine if an event to be sent is exempt from having to consent
@@ -425,9 +423,9 @@ class EventCreationHandler(object):
     @defer.inlineCallbacks
     def _is_server_notices_room(self, room_id):
         if self.config.server_notices_mxid is None:
-            defer.returnValue(False)
+            return False
         user_ids = yield self.store.get_users_in_room(room_id)
-        defer.returnValue(self.config.server_notices_mxid in user_ids)
+        return self.config.server_notices_mxid in user_ids
 
     @defer.inlineCallbacks
     def assert_accepted_privacy_policy(self, requester):
@@ -507,7 +505,7 @@ class EventCreationHandler(object):
                     event.event_id,
                     prev_state.event_id,
                 )
-                defer.returnValue(prev_state)
+                return prev_state
 
         yield self.handle_new_client_event(
             requester=requester, event=event, context=context, ratelimit=ratelimit
@@ -531,7 +529,7 @@ class EventCreationHandler(object):
             prev_content = encode_canonical_json(prev_event.content)
             next_content = encode_canonical_json(event.content)
             if prev_content == next_content:
-                defer.returnValue(prev_event)
+                return prev_event
         return
 
     @defer.inlineCallbacks
@@ -563,7 +561,7 @@ class EventCreationHandler(object):
             yield self.send_nonmember_event(
                 requester, event, context, ratelimit=ratelimit
             )
-        defer.returnValue(event)
+        return event
 
     @measure_func("create_new_client_event")
     @defer.inlineCallbacks
@@ -626,7 +624,7 @@ class EventCreationHandler(object):
 
         logger.debug("Created event %s", event.event_id)
 
-        defer.returnValue((event, context))
+        return (event, context)
 
     @measure_func("handle_new_client_event")
     @defer.inlineCallbacks

synapse/handlers/pagination.py

@@ -242,13 +242,11 @@ class PaginationHandler(object):
             )
 
         if not events:
-            defer.returnValue(
-                {
-                    "chunk": [],
-                    "start": pagin_config.from_token.to_string(),
-                    "end": next_token.to_string(),
-                }
-            )
+            return {
+                "chunk": [],
+                "start": pagin_config.from_token.to_string(),
+                "end": next_token.to_string(),
+            }
 
         state = None
         if event_filter and event_filter.lazy_load_members() and len(events) > 0:
@@ -286,4 +284,4 @@ class PaginationHandler(object):
                 )
             )
 
-        defer.returnValue(chunk)
+        return chunk

synapse/handlers/presence.py

@@ -461,7 +461,7 @@ class PresenceHandler(object):
                 if affect_presence:
                     run_in_background(_end)
 
-        defer.returnValue(_user_syncing())
+        return _user_syncing()
 
     def get_currently_syncing_users(self):
         """Get the set of user ids that are currently syncing on this HS.
@@ -556,7 +556,7 @@ class PresenceHandler(object):
         """Get the current presence state for a user.
         """
         res = yield self.current_state_for_users([user_id])
-        defer.returnValue(res[user_id])
+        return res[user_id]
 
     @defer.inlineCallbacks
     def current_state_for_users(self, user_ids):
@@ -585,7 +585,7 @@ class PresenceHandler(object):
                 states.update(new)
                 self.user_to_current_state.update(new)
 
-        defer.returnValue(states)
+        return states
 
     @defer.inlineCallbacks
     def _persist_and_notify(self, states):
@@ -681,7 +681,7 @@ class PresenceHandler(object):
     def get_state(self, target_user, as_event=False):
         results = yield self.get_states([target_user.to_string()], as_event=as_event)
 
-        defer.returnValue(results[0])
+        return results[0]
 
     @defer.inlineCallbacks
     def get_states(self, target_user_ids, as_event=False):
@@ -703,17 +703,15 @@ class PresenceHandler(object):
 
         now = self.clock.time_msec()
         if as_event:
-            defer.returnValue(
-                [
-                    {
-                        "type": "m.presence",
-                        "content": format_user_presence_state(state, now),
-                    }
-                    for state in updates
-                ]
-            )
+            return [
+                {
+                    "type": "m.presence",
+                    "content": format_user_presence_state(state, now),
+                }
+                for state in updates
+            ]
         else:
-            defer.returnValue(updates)
+            return updates
 
     @defer.inlineCallbacks
     def set_state(self, target_user, state, ignore_status_msg=False):
@@ -757,9 +755,9 @@ class PresenceHandler(object):
         )
 
         if observer_room_ids & observed_room_ids:
-            defer.returnValue(True)
+            return True
 
-        defer.returnValue(False)
+        return False
 
     @defer.inlineCallbacks
     def get_all_presence_updates(self, last_id, current_id):
@@ -778,7 +776,7 @@ class PresenceHandler(object):
         # TODO(markjh): replicate the unpersisted changes.
         # This could use the in-memory stores for recent changes.
         rows = yield self.store.get_all_presence_updates(last_id, current_id)
-        defer.returnValue(rows)
+        return rows
 
     def notify_new_event(self):
         """Called when new events have happened. Handles users and servers
@@ -1034,7 +1032,7 @@ class PresenceEventSource(object):
                 #
                 # Hence this guard where we just return nothing so that the sync
                 # doesn't return. C.f. #5503.
-                defer.returnValue(([], max_token))
+                return ([], max_token)
 
             presence = self.get_presence_handler()
             stream_change_cache = self.store.presence_stream_cache
@@ -1068,17 +1066,11 @@ class PresenceEventSource(object):
             updates = yield presence.current_state_for_users(user_ids_changed)
 
         if include_offline:
-            defer.returnValue((list(updates.values()), max_token))
+            return (list(updates.values()), max_token)
         else:
-            defer.returnValue(
-                (
-                    [
-                        s
-                        for s in itervalues(updates)
-                        if s.state != PresenceState.OFFLINE
-                    ],
-                    max_token,
-                )
+            return (
+                [s for s in itervalues(updates) if s.state != PresenceState.OFFLINE],
+                max_token,
             )
 
     def get_current_key(self):
@@ -1107,7 +1099,7 @@ class PresenceEventSource(object):
             )
             users_interested_in.update(user_ids)
 
-        defer.returnValue(users_interested_in)
+        return users_interested_in
 
 
 def handle_timeouts(user_states, is_mine_fn, syncing_user_ids, now):
@@ -1287,7 +1279,7 @@ def get_interested_parties(store, states):
         # Always notify self
         users_to_states.setdefault(state.user_id, []).append(state)
 
-    defer.returnValue((room_ids_to_states, users_to_states))
+    return (room_ids_to_states, users_to_states)
 
 
 @defer.inlineCallbacks
@@ -1321,4 +1313,4 @@ def get_interested_remotes(store, states, state_handler):
         host = get_domain_from_id(user_id)
         hosts_and_states.append(([host], states))
 
-    defer.returnValue(hosts_and_states)
+    return hosts_and_states

synapse/handlers/profile.py

@@ -73,7 +73,7 @@ class BaseProfileHandler(BaseHandler):
                     raise SynapseError(404, "Profile was not found", Codes.NOT_FOUND)
                 raise
 
-            defer.returnValue({"displayname": displayname, "avatar_url": avatar_url})
+            return {"displayname": displayname, "avatar_url": avatar_url}
         else:
             try:
                 result = yield self.federation.make_query(
@@ -82,7 +82,7 @@ class BaseProfileHandler(BaseHandler):
                     args={"user_id": user_id},
                     ignore_backoff=True,
                 )
-                defer.returnValue(result)
+                return result
             except RequestSendFailed as e:
                 raise_from(SynapseError(502, "Failed to fetch profile"), e)
             except HttpResponseException as e:
@@ -108,10 +108,10 @@ class BaseProfileHandler(BaseHandler):
                     raise SynapseError(404, "Profile was not found", Codes.NOT_FOUND)
                 raise
 
-            defer.returnValue({"displayname": displayname, "avatar_url": avatar_url})
+            return {"displayname": displayname, "avatar_url": avatar_url}
         else:
             profile = yield self.store.get_from_remote_profile_cache(user_id)
-            defer.returnValue(profile or {})
+            return profile or {}
 
     @defer.inlineCallbacks
     def get_displayname(self, target_user):
@@ -125,7 +125,7 @@ class BaseProfileHandler(BaseHandler):
                     raise SynapseError(404, "Profile was not found", Codes.NOT_FOUND)
                 raise
 
-            defer.returnValue(displayname)
+            return displayname
         else:
             try:
                 result = yield self.federation.make_query(
@@ -139,7 +139,7 @@ class BaseProfileHandler(BaseHandler):
             except HttpResponseException as e:
                 raise e.to_synapse_error()
 
-            defer.returnValue(result["displayname"])
+            return result["displayname"]
 
     @defer.inlineCallbacks
     def set_displayname(self, target_user, requester, new_displayname, by_admin=False):
@@ -186,7 +186,7 @@ class BaseProfileHandler(BaseHandler):
                 if e.code == 404:
                     raise SynapseError(404, "Profile was not found", Codes.NOT_FOUND)
                 raise
-            defer.returnValue(avatar_url)
+            return avatar_url
         else:
             try:
                 result = yield self.federation.make_query(
@@ -200,7 +200,7 @@ class BaseProfileHandler(BaseHandler):
             except HttpResponseException as e:
                 raise e.to_synapse_error()
 
-            defer.returnValue(result["avatar_url"])
+            return result["avatar_url"]
 
     @defer.inlineCallbacks
     def set_avatar_url(self, target_user, requester, new_avatar_url, by_admin=False):
@@ -251,7 +251,7 @@ class BaseProfileHandler(BaseHandler):
                 raise SynapseError(404, "Profile was not found", Codes.NOT_FOUND)
             raise
 
-        defer.returnValue(response)
+        return response
 
     @defer.inlineCallbacks
     def _update_join_states(self, requester, target_user):

synapse/handlers/receipts.py

@@ -84,7 +84,7 @@ class ReceiptsHandler(BaseHandler):
 
         if min_batch_id is None:
             # no new receipts
-            defer.returnValue(False)
+            return False
 
         affected_room_ids = list(set([r.room_id for r in receipts]))
 
@@ -94,7 +94,7 @@ class ReceiptsHandler(BaseHandler):
             min_batch_id, max_batch_id, affected_room_ids
         )
 
-        defer.returnValue(True)
+        return True
 
     @defer.inlineCallbacks
     def received_client_receipt(self, room_id, receipt_type, user_id, event_id):
@@ -124,9 +124,9 @@ class ReceiptsHandler(BaseHandler):
         )
 
         if not result:
-            defer.returnValue([])
+            return []
 
-        defer.returnValue(result)
+        return result
 
 
 class ReceiptEventSource(object):
@@ -139,13 +139,13 @@ class ReceiptEventSource(object):
         to_key = yield self.get_current_key()
 
         if from_key == to_key:
-            defer.returnValue(([], to_key))
+            return ([], to_key)
 
         events = yield self.store.get_linearized_receipts_for_rooms(
             room_ids, from_key=from_key, to_key=to_key
         )
 
-        defer.returnValue((events, to_key))
+        return (events, to_key)
 
     def get_current_key(self, direction="f"):
         return self.store.get_max_receipt_stream_id()
@@ -164,4 +164,4 @@ class ReceiptEventSource(object):
             room_ids, from_key=from_key, to_key=to_key
         )
 
-        defer.returnValue((events, to_key))
+        return (events, to_key)

synapse/handlers/register.py

@@ -265,7 +265,7 @@ class RegistrationHandler(BaseHandler):
             # Bind email to new account
             yield self._register_email_threepid(user_id, threepid_dict, None, False)
 
-        defer.returnValue(user_id)
+        return user_id
 
     @defer.inlineCallbacks
     def _auto_join_rooms(self, user_id):
@@ -360,7 +360,7 @@ class RegistrationHandler(BaseHandler):
             appservice_id=service_id,
             create_profile_with_displayname=user.localpart,
         )
-        defer.returnValue(user_id)
+        return user_id
 
     @defer.inlineCallbacks
     def check_recaptcha(self, ip, private_key, challenge, response):
@@ -461,7 +461,7 @@ class RegistrationHandler(BaseHandler):
 
         id = self._next_generated_user_id
         self._next_generated_user_id += 1
-        defer.returnValue(str(id))
+        return str(id)
 
     @defer.inlineCallbacks
     def _validate_captcha(self, ip_addr, private_key, challenge, response):
@@ -481,7 +481,7 @@ class RegistrationHandler(BaseHandler):
             "error_url": "http://www.recaptcha.net/recaptcha/api/challenge?"
             + "error=%s" % lines[1],
         }
-        defer.returnValue(json)
+        return json
 
     @defer.inlineCallbacks
     def _submit_captcha(self, ip_addr, private_key, challenge, response):
@@ -497,7 +497,7 @@ class RegistrationHandler(BaseHandler):
                 "response": response,
             },
         )
-        defer.returnValue(data)
+        return data
 
     @defer.inlineCallbacks
     def _join_user_to_room(self, requester, room_identifier):
@@ -622,7 +622,7 @@ class RegistrationHandler(BaseHandler):
                 initial_display_name=initial_display_name,
                 is_guest=is_guest,
             )
-            defer.returnValue((r["device_id"], r["access_token"]))
+            return (r["device_id"], r["access_token"])
 
         valid_until_ms = None
         if self.session_lifetime is not None:
@@ -645,7 +645,7 @@ class RegistrationHandler(BaseHandler):
                 user_id, device_id=device_id, valid_until_ms=valid_until_ms
             )
 
-        defer.returnValue((device_id, access_token))
+        return (device_id, access_token)
 
     @defer.inlineCallbacks
     def post_registration_actions(
@@ -798,7 +798,7 @@ class RegistrationHandler(BaseHandler):
             if ex.errcode == Codes.MISSING_PARAM:
                 # This will only happen if the ID server returns a malformed response
                 logger.info("Can't add incomplete 3pid")
-                defer.returnValue(None)
+                return None
             raise
 
         yield self._auth_handler.add_threepid(

synapse/handlers/room.py

@@ -128,7 +128,7 @@ class RoomCreationHandler(BaseHandler):
             old_room_id,
             new_version,  # args for _upgrade_room
         )
-        defer.returnValue(ret)
+        return ret
 
     @defer.inlineCallbacks
     def _upgrade_room(self, requester, old_room_id, new_version):
@@ -193,7 +193,7 @@ class RoomCreationHandler(BaseHandler):
             requester, old_room_id, new_room_id, old_room_state
         )
 
-        defer.returnValue(new_room_id)
+        return new_room_id
 
     @defer.inlineCallbacks
     def _update_upgraded_room_pls(
@@ -671,7 +671,7 @@ class RoomCreationHandler(BaseHandler):
             result["room_alias"] = room_alias.to_string()
             yield directory_handler.send_room_alias_update_event(requester, room_id)
 
-        defer.returnValue(result)
+        return result
 
     @defer.inlineCallbacks
     def _send_events_for_new_room(
@@ -796,7 +796,7 @@ class RoomCreationHandler(BaseHandler):
                     room_creator_user_id=creator_id,
                     is_public=is_public,
                 )
-                defer.returnValue(gen_room_id)
+                return gen_room_id
             except StoreError:
                 attempts += 1
         raise StoreError(500, "Couldn't generate a room ID.")
@@ -839,7 +839,7 @@ class RoomContextHandler(object):
             event_id, get_prev_content=True, allow_none=True
         )
         if not event:
-            defer.returnValue(None)
+            return None
             return
 
         filtered = yield (filter_evts([event]))
@@ -890,7 +890,7 @@ class RoomContextHandler(object):
 
         results["end"] = token.copy_and_replace("room_key", results["end"]).to_string()
 
-        defer.returnValue(results)
+        return results
 
 
 class RoomEventSource(object):
@@ -941,7 +941,7 @@ class RoomEventSource(object):
             else:
                 end_key = to_key
 
-        defer.returnValue((events, end_key))
+        return (events, end_key)
 
     def get_current_key(self):
         return self.store.get_room_events_max_id()
@@ -959,4 +959,4 @@ class RoomEventSource(object):
             limit=config.limit,
         )
 
-        defer.returnValue((events, next_key))
+        return (events, next_key)

synapse/handlers/room_list.py

@@ -325,7 +325,7 @@ class RoomListHandler(BaseHandler):
                     current_limit=since_token.current_limit - 1,
                 ).to_token()
 
-        defer.returnValue(results)
+        return results
 
     @defer.inlineCallbacks
     def _append_room_entry_to_chunk(
@@ -420,7 +420,7 @@ class RoomListHandler(BaseHandler):
         if join_rules_event:
             join_rule = join_rules_event.content.get("join_rule", None)
             if not allow_private and join_rule and join_rule != JoinRules.PUBLIC:
-                defer.returnValue(None)
+                return None
 
         # Return whether this room is open to federation users or not
         create_event = current_state.get((EventTypes.Create, ""))
@@ -469,7 +469,7 @@ class RoomListHandler(BaseHandler):
             if avatar_url:
                 result["avatar_url"] = avatar_url
 
-        defer.returnValue(result)
+        return result
 
     @defer.inlineCallbacks
     def get_remote_public_room_list(
@@ -482,7 +482,7 @@ class RoomListHandler(BaseHandler):
         third_party_instance_id=None,
     ):
         if not self.enable_room_list_search:
-            defer.returnValue({"chunk": [], "total_room_count_estimate": 0})
+            return {"chunk": [], "total_room_count_estimate": 0}
 
         if search_filter:
             # We currently don't support searching across federation, so we have
@@ -507,7 +507,7 @@ class RoomListHandler(BaseHandler):
                 ]
             }
 
-        defer.returnValue(res)
+        return res
 
     def _get_remote_list_cached(
         self,

synapse/handlers/room_member.py

@@ -191,7 +191,7 @@ class RoomMemberHandler(object):
         )
         if duplicate is not None:
             # Discard the new event since this membership change is a no-op.
-            defer.returnValue(duplicate)
+            return duplicate
 
         yield self.event_creation_handler.handle_new_client_event(
             requester, event, context, extra_users=[target], ratelimit=ratelimit
@@ -233,7 +233,7 @@ class RoomMemberHandler(object):
                 if prev_member_event.membership == Membership.JOIN:
                     yield self._user_left_room(target, room_id)
 
-        defer.returnValue(event)
+        return event
 
     @defer.inlineCallbacks
     def copy_room_tags_and_direct_to_room(self, old_room_id, new_room_id, user_id):
@@ -303,7 +303,7 @@ class RoomMemberHandler(object):
                 require_consent=require_consent,
             )
 
-        defer.returnValue(result)
+        return result
 
     @defer.inlineCallbacks
     def _update_membership(
@@ -423,7 +423,7 @@ class RoomMemberHandler(object):
                 same_membership = old_membership == effective_membership_state
                 same_sender = requester.user.to_string() == old_state.sender
                 if same_sender and same_membership and same_content:
-                    defer.returnValue(old_state)
+                    return old_state
 
             if old_membership in ["ban", "leave"] and action == "kick":
                 raise AuthError(403, "The target user is not in the room")
@@ -473,7 +473,7 @@ class RoomMemberHandler(object):
                 ret = yield self._remote_join(
                     requester, remote_room_hosts, room_id, target, content
                 )
-                defer.returnValue(ret)
+                return ret
 
         elif effective_membership_state == Membership.LEAVE:
             if not is_host_in_room:
@@ -495,7 +495,7 @@ class RoomMemberHandler(object):
                     res = yield self._remote_reject_invite(
                         requester, remote_room_hosts, room_id, target
                     )
-                    defer.returnValue(res)
+                    return res
 
         res = yield self._local_membership_update(
             requester=requester,
@@ -508,7 +508,7 @@ class RoomMemberHandler(object):
             content=content,
             require_consent=require_consent,
         )
-        defer.returnValue(res)
+        return res
 
     @defer.inlineCallbacks
     def send_membership_event(
@@ -596,11 +596,11 @@ class RoomMemberHandler(object):
         """
         guest_access_id = current_state_ids.get((EventTypes.GuestAccess, ""), None)
         if not guest_access_id:
-            defer.returnValue(False)
+            return False
 
         guest_access = yield self.store.get_event(guest_access_id)
 
-        defer.returnValue(
+        return (
             guest_access
             and guest_access.content
             and "guest_access" in guest_access.content
@@ -635,7 +635,7 @@ class RoomMemberHandler(object):
             servers.remove(room_alias.domain)
         servers.insert(0, room_alias.domain)
 
-        defer.returnValue((RoomID.from_string(room_id), servers))
+        return (RoomID.from_string(room_id), servers)
 
     @defer.inlineCallbacks
     def _get_inviter(self, user_id, room_id):
@@ -643,7 +643,7 @@ class RoomMemberHandler(object):
             user_id=user_id, room_id=room_id
         )
         if invite:
-            defer.returnValue(UserID.from_string(invite.sender))
+            return UserID.from_string(invite.sender)
 
     @defer.inlineCallbacks
     def do_3pid_invite(
@@ -708,11 +708,11 @@ class RoomMemberHandler(object):
                 if "signatures" not in data:
                     raise AuthError(401, "No signatures on 3pid binding")
                 yield self._verify_any_signature(data, id_server)
-                defer.returnValue(data["mxid"])
+                return data["mxid"]
 
         except IOError as e:
             logger.warn("Error from identity server lookup: %s" % (e,))
-            defer.returnValue(None)
+            return None
 
     @defer.inlineCallbacks
     def _verify_any_signature(self, data, server_hostname):
@@ -904,7 +904,7 @@ class RoomMemberHandler(object):
         if not public_keys:
             public_keys.append(fallback_public_key)
         display_name = data["display_name"]
-        defer.returnValue((token, public_keys, fallback_public_key, display_name))
+        return (token, public_keys, fallback_public_key, display_name)
 
     @defer.inlineCallbacks
     def _is_host_in_room(self, current_state_ids):
@@ -913,7 +913,7 @@ class RoomMemberHandler(object):
         create_event_id = current_state_ids.get(("m.room.create", ""))
         if len(current_state_ids) == 1 and create_event_id:
             # We can only get here if we're in the process of creating the room
-            defer.returnValue(True)
+            return True
 
         for etype, state_key in current_state_ids:
             if etype != EventTypes.Member or not self.hs.is_mine_id(state_key):
@@ -925,16 +925,16 @@ class RoomMemberHandler(object):
                 continue
 
             if event.membership == Membership.JOIN:
-                defer.returnValue(True)
+                return True
 
-        defer.returnValue(False)
+        return False
 
     @defer.inlineCallbacks
     def _is_server_notice_room(self, room_id):
         if self._server_notices_mxid is None:
-            defer.returnValue(False)
+            return False
         user_ids = yield self.store.get_users_in_room(room_id)
-        defer.returnValue(self._server_notices_mxid in user_ids)
+        return self._server_notices_mxid in user_ids
 
 
 class RoomMemberMasterHandler(RoomMemberHandler):
@@ -978,7 +978,7 @@ class RoomMemberMasterHandler(RoomMemberHandler):
             ret = yield fed_handler.do_remotely_reject_invite(
                 remote_room_hosts, room_id, target.to_string()
             )
-            defer.returnValue(ret)
+            return ret
         except Exception as e:
             # if we were unable to reject the exception, just mark
             # it as rejected on our end and plough ahead.
@@ -989,7 +989,7 @@ class RoomMemberMasterHandler(RoomMemberHandler):
             logger.warn("Failed to reject invite: %s", e)
 
             yield self.store.locally_reject_invite(target.to_string(), room_id)
-            defer.returnValue({})
+            return {}
 
     def _user_joined_room(self, target, room_id):
         """Implements RoomMemberHandler._user_joined_room

synapse/handlers/room_member_worker.py

@@ -53,7 +53,7 @@ class RoomMemberWorkerHandler(RoomMemberHandler):
 
         yield self._user_joined_room(user, room_id)
 
-        defer.returnValue(ret)
+        return ret
 
     def _remote_reject_invite(self, requester, remote_room_hosts, room_id, target):
         """Implements RoomMemberHandler._remote_reject_invite

synapse/handlers/search.py

@@ -69,7 +69,7 @@ class SearchHandler(BaseHandler):
             # Scan through the old room for further predecessors
             room_id = predecessor["room_id"]
 
-        defer.returnValue(historical_room_ids)
+        return historical_room_ids
 
     @defer.inlineCallbacks
     def search(self, user, content, batch=None):
@@ -186,13 +186,11 @@ class SearchHandler(BaseHandler):
             room_ids.intersection_update({batch_group_key})
 
         if not room_ids:
-            defer.returnValue(
-                {
-                    "search_categories": {
-                        "room_events": {"results": [], "count": 0, "highlights": []}
-                    }
+            return {
+                "search_categories": {
+                    "room_events": {"results": [], "count": 0, "highlights": []}
                 }
-            )
+            }
 
         rank_map = {}  # event_id -> rank of event
         allowed_events = []
@@ -455,4 +453,4 @@ class SearchHandler(BaseHandler):
         if global_next_batch:
             rooms_cat_res["next_batch"] = global_next_batch
 
-        defer.returnValue({"search_categories": {"room_events": rooms_cat_res}})
+        return {"search_categories": {"room_events": rooms_cat_res}}

synapse/handlers/state_deltas.py

@@ -48,7 +48,7 @@ class StateDeltasHandler(object):
 
         if not event and not prev_event:
             logger.debug("Neither event exists: %r %r", prev_event_id, event_id)
-            defer.returnValue(None)
+            return None
 
         prev_value = None
         value = None
@@ -62,8 +62,8 @@ class StateDeltasHandler(object):
         logger.debug("prev_value: %r -> value: %r", prev_value, value)
 
         if value == public_value and prev_value != public_value:
-            defer.returnValue(True)
+            return True
         elif value != public_value and prev_value == public_value:
-            defer.returnValue(False)
+            return False
         else:
-            defer.returnValue(None)
+            return None

synapse/handlers/stats.py

@@ -86,7 +86,7 @@ class StatsHandler(StateDeltasHandler):
 
         # If still None then the initial background update hasn't happened yet
         if self.pos is None:
-            defer.returnValue(None)
+            return None
 
         # Loop round handling deltas until we're up to date
         while True:
@@ -328,6 +328,6 @@ class StatsHandler(StateDeltasHandler):
                 == "world_readable"
             )
         ):
-            defer.returnValue(True)
+            return True
         else:
-            defer.returnValue(False)
+            return False

synapse/handlers/sync.py

@@ -263,7 +263,7 @@ class SyncHandler(object):
             timeout,
             full_state,
         )
-        defer.returnValue(res)
+        return res
 
     @defer.inlineCallbacks
     def _wait_for_sync_for_user(self, sync_config, since_token, timeout, full_state):
@@ -303,7 +303,7 @@ class SyncHandler(object):
                 lazy_loaded = "false"
             non_empty_sync_counter.labels(sync_type, lazy_loaded).inc()
 
-        defer.returnValue(result)
+        return result
 
     def current_sync_for_user(self, sync_config, since_token=None, full_state=False):
         """Get the sync for client needed to match what the server has now.
@@ -317,7 +317,7 @@ class SyncHandler(object):
         user_id = user.to_string()
         rules = yield self.store.get_push_rules_for_user(user_id)
         rules = format_push_rules_for_user(user, rules)
-        defer.returnValue(rules)
+        return rules
 
     @defer.inlineCallbacks
     def ephemeral_by_room(self, sync_result_builder, now_token, since_token=None):
@@ -378,7 +378,7 @@ class SyncHandler(object):
                 event_copy = {k: v for (k, v) in iteritems(event) if k != "room_id"}
                 ephemeral_by_room.setdefault(room_id, []).append(event_copy)
 
-        defer.returnValue((now_token, ephemeral_by_room))
+        return (now_token, ephemeral_by_room)
 
     @defer.inlineCallbacks
     def _load_filtered_recents(
@@ -426,8 +426,8 @@ class SyncHandler(object):
                 recents = []
 
             if not limited or block_all_timeline:
-                defer.returnValue(
-                    TimelineBatch(events=recents, prev_batch=now_token, limited=False)
+                return TimelineBatch(
+                    events=recents, prev_batch=now_token, limited=False
                 )
 
             filtering_factor = 2
@@ -490,12 +490,10 @@ class SyncHandler(object):
 
             prev_batch_token = now_token.copy_and_replace("room_key", room_key)
 
-        defer.returnValue(
-            TimelineBatch(
-                events=recents,
-                prev_batch=prev_batch_token,
-                limited=limited or newly_joined_room,
-            )
+        return TimelineBatch(
+            events=recents,
+            prev_batch=prev_batch_token,
+            limited=limited or newly_joined_room,
         )
 
     @defer.inlineCallbacks
@@ -517,7 +515,7 @@ class SyncHandler(object):
         if event.is_state():
             state_ids = state_ids.copy()
             state_ids[(event.type, event.state_key)] = event.event_id
-        defer.returnValue(state_ids)
+        return state_ids
 
     @defer.inlineCallbacks
     def get_state_at(self, room_id, stream_position, state_filter=StateFilter.all()):
@@ -549,7 +547,7 @@ class SyncHandler(object):
         else:
             # no events in this room - so presumably no state
             state = {}
-        defer.returnValue(state)
+        return state
 
     @defer.inlineCallbacks
     def compute_summary(self, room_id, sync_config, batch, state, now_token):
@@ -579,7 +577,7 @@ class SyncHandler(object):
         )
 
         if not last_events:
-            defer.returnValue(None)
+            return None
             return
 
         last_event = last_events[-1]
@@ -611,14 +609,14 @@ class SyncHandler(object):
         if name_id:
             name = yield self.store.get_event(name_id, allow_none=True)
             if name and name.content.get("name"):
-                defer.returnValue(summary)
+                return summary
 
         if canonical_alias_id:
             canonical_alias = yield self.store.get_event(
                 canonical_alias_id, allow_none=True
             )
             if canonical_alias and canonical_alias.content.get("alias"):
-                defer.returnValue(summary)
+                return summary
 
         me = sync_config.user.to_string()
 
@@ -652,7 +650,7 @@ class SyncHandler(object):
             summary["m.heroes"] = sorted([user_id for user_id in gone_user_ids])[0:5]
 
         if not sync_config.filter_collection.lazy_load_members():
-            defer.returnValue(summary)
+            return summary
 
         # ensure we send membership events for heroes if needed
         cache_key = (sync_config.user.to_string(), sync_config.device_id)
@@ -686,7 +684,7 @@ class SyncHandler(object):
             cache.set(s.state_key, s.event_id)
             state[(EventTypes.Member, s.state_key)] = s
 
-        defer.returnValue(summary)
+        return summary
 
     def get_lazy_loaded_members_cache(self, cache_key):
         cache = self.lazy_loaded_members_cache.get(cache_key)
@@ -871,14 +869,12 @@ class SyncHandler(object):
         if state_ids:
             state = yield self.store.get_events(list(state_ids.values()))
 
-        defer.returnValue(
-            {
-                (e.type, e.state_key): e
-                for e in sync_config.filter_collection.filter_room_state(
-                    list(state.values())
-                )
-            }
-        )
+        return {
+            (e.type, e.state_key): e
+            for e in sync_config.filter_collection.filter_room_state(
+                list(state.values())
+            )
+        }
 
     @defer.inlineCallbacks
     def unread_notifs_for_room_id(self, room_id, sync_config):
@@ -894,11 +890,11 @@ class SyncHandler(object):
                 notifs = yield self.store.get_unread_event_push_actions_by_room_for_user(
                     room_id, sync_config.user.to_string(), last_unread_event_id
                 )
-                defer.returnValue(notifs)
+                return notifs
 
         # There is no new information in this period, so your notification
         # count is whatever it was last time.
-        defer.returnValue(None)
+        return None
 
     @defer.inlineCallbacks
     def generate_sync_result(self, sync_config, since_token=None, full_state=False):
@@ -989,19 +985,17 @@ class SyncHandler(object):
                     "Sync result for newly joined room %s: %r", room_id, joined_room
                 )
 
-        defer.returnValue(
-            SyncResult(
-                presence=sync_result_builder.presence,
-                account_data=sync_result_builder.account_data,
-                joined=sync_result_builder.joined,
-                invited=sync_result_builder.invited,
-                archived=sync_result_builder.archived,
-                to_device=sync_result_builder.to_device,
-                device_lists=device_lists,
-                groups=sync_result_builder.groups,
-                device_one_time_keys_count=one_time_key_counts,
-                next_batch=sync_result_builder.now_token,
-            )
+        return SyncResult(
+            presence=sync_result_builder.presence,
+            account_data=sync_result_builder.account_data,
+            joined=sync_result_builder.joined,
+            invited=sync_result_builder.invited,
+            archived=sync_result_builder.archived,
+            to_device=sync_result_builder.to_device,
+            device_lists=device_lists,
+            groups=sync_result_builder.groups,
+            device_one_time_keys_count=one_time_key_counts,
+            next_batch=sync_result_builder.now_token,
         )
 
     @measure_func("_generate_sync_entry_for_groups")
@@ -1124,11 +1118,9 @@ class SyncHandler(object):
             # Remove any users that we still share a room with.
             newly_left_users -= users_who_share_room
 
-            defer.returnValue(
-                DeviceLists(changed=users_that_have_changed, left=newly_left_users)
-            )
+            return DeviceLists(changed=users_that_have_changed, left=newly_left_users)
         else:
-            defer.returnValue(DeviceLists(changed=[], left=[]))
+            return DeviceLists(changed=[], left=[])
 
     @defer.inlineCallbacks
     def _generate_sync_entry_for_to_device(self, sync_result_builder):
@@ -1225,7 +1217,7 @@ class SyncHandler(object):
 
         sync_result_builder.account_data = account_data_for_user
 
-        defer.returnValue(account_data_by_room)
+        return account_data_by_room
 
     @defer.inlineCallbacks
     def _generate_sync_entry_for_presence(
@@ -1325,7 +1317,7 @@ class SyncHandler(object):
                     )
                     if not tags_by_room:
                         logger.debug("no-oping sync")
-                        defer.returnValue(([], [], [], []))
+                        return ([], [], [], [])
 
         ignored_account_data = yield self.store.get_global_account_data_by_type_for_user(
             "m.ignored_user_list", user_id=user_id
@@ -1388,13 +1380,11 @@ class SyncHandler(object):
 
         newly_left_users -= newly_joined_or_invited_users
 
-        defer.returnValue(
-            (
-                newly_joined_rooms,
-                newly_joined_or_invited_users,
-                newly_left_rooms,
-                newly_left_users,
-            )
+        return (
+            newly_joined_rooms,
+            newly_joined_or_invited_users,
+            newly_left_rooms,
+            newly_left_users,
         )
 
     @defer.inlineCallbacks
@@ -1414,13 +1404,13 @@ class SyncHandler(object):
         )
 
         if rooms_changed:
-            defer.returnValue(True)
+            return True
 
         stream_id = RoomStreamToken.parse_stream_token(since_token.room_key).stream
         for room_id in sync_result_builder.joined_room_ids:
             if self.store.has_room_changed_since(room_id, stream_id):
-                defer.returnValue(True)
-        defer.returnValue(False)
+                return True
+        return False
 
     @defer.inlineCallbacks
     def _get_rooms_changed(self, sync_result_builder, ignored_users):
@@ -1637,7 +1627,7 @@ class SyncHandler(object):
                 )
             room_entries.append(entry)
 
-        defer.returnValue((room_entries, invited, newly_joined_rooms, newly_left_rooms))
+        return (room_entries, invited, newly_joined_rooms, newly_left_rooms)
 
     @defer.inlineCallbacks
     def _get_all_rooms(self, sync_result_builder, ignored_users):
@@ -1711,7 +1701,7 @@ class SyncHandler(object):
                     )
                 )
 
-        defer.returnValue((room_entries, invited, []))
+        return (room_entries, invited, [])
 
     @defer.inlineCallbacks
     def _generate_room_entry(
@@ -1912,7 +1902,7 @@ class SyncHandler(object):
                 joined_room_ids.add(room_id)
 
         joined_room_ids = frozenset(joined_room_ids)
-        defer.returnValue(joined_room_ids)
+        return joined_room_ids
 
 
 def _action_has_highlight(actions):

synapse/handlers/typing.py

@@ -140,7 +140,7 @@ class TypingHandler(object):
 
         if was_present:
             # No point sending another notification
-            defer.returnValue(None)
+            return None
 
         self._push_update(member=member, typing=True)
 
@@ -173,7 +173,7 @@ class TypingHandler(object):
     def _stopped_typing(self, member):
         if member.user_id not in self._room_typing.get(member.room_id, set()):
             # No point
-            defer.returnValue(None)
+            return None
 
         self._member_typing_until.pop(member, None)
         self._member_last_federation_poke.pop(member, None)

synapse/handlers/user_directory.py

@@ -133,7 +133,7 @@ class UserDirectoryHandler(StateDeltasHandler):
 
         # If still None then the initial background update hasn't happened yet
         if self.pos is None:
-            defer.returnValue(None)
+            return None
 
         # Loop round handling deltas until we're up to date
         while True:

synapse/http/client.py

@@ -294,7 +294,7 @@ class SimpleHttpClient(object):
             logger.info(
                 "Received response to %s %s: %s", method, redact_uri(uri), response.code
             )
-            defer.returnValue(response)
+            return response
         except Exception as e:
             incoming_responses_counter.labels(method, "ERR").inc()
             logger.info(
@@ -345,7 +345,7 @@ class SimpleHttpClient(object):
         body = yield make_deferred_yieldable(readBody(response))
 
         if 200 <= response.code < 300:
-            defer.returnValue(json.loads(body))
+            return json.loads(body)
         else:
             raise HttpResponseException(response.code, response.phrase, body)
 
@@ -385,7 +385,7 @@ class SimpleHttpClient(object):
         body = yield make_deferred_yieldable(readBody(response))
 
         if 200 <= response.code < 300:
-            defer.returnValue(json.loads(body))
+            return json.loads(body)
         else:
             raise HttpResponseException(response.code, response.phrase, body)
 
@@ -410,7 +410,7 @@ class SimpleHttpClient(object):
             ValueError: if the response was not JSON
         """
         body = yield self.get_raw(uri, args, headers=headers)
-        defer.returnValue(json.loads(body))
+        return json.loads(body)
 
     @defer.inlineCallbacks
     def put_json(self, uri, json_body, args={}, headers=None):
@@ -453,7 +453,7 @@ class SimpleHttpClient(object):
         body = yield make_deferred_yieldable(readBody(response))
 
         if 200 <= response.code < 300:
-            defer.returnValue(json.loads(body))
+            return json.loads(body)
         else:
             raise HttpResponseException(response.code, response.phrase, body)
 
@@ -488,7 +488,7 @@ class SimpleHttpClient(object):
         body = yield make_deferred_yieldable(readBody(response))
 
         if 200 <= response.code < 300:
-            defer.returnValue(body)
+            return body
         else:
             raise HttpResponseException(response.code, response.phrase, body)
 
@@ -545,13 +545,11 @@ class SimpleHttpClient(object):
         except Exception as e:
             raise_from(SynapseError(502, ("Failed to download remote body: %s" % e)), e)
 
-        defer.returnValue(
-            (
-                length,
-                resp_headers,
-                response.request.absoluteURI.decode("ascii"),
-                response.code,
-            )
+        return (
+            length,
+            resp_headers,
+            response.request.absoluteURI.decode("ascii"),
+            response.code,
         )
 
 
@@ -627,10 +625,10 @@ class CaptchaServerHttpClient(SimpleHttpClient):
 
         try:
             body = yield make_deferred_yieldable(readBody(response))
-            defer.returnValue(body)
+            return body
         except PartialDownloadError as e:
             # twisted dislikes google's response, no content length.
-            defer.returnValue(e.response)
+            return e.response
 
 
 def encode_urlencode_args(args):

synapse/http/federation/matrix_federation_agent.py

@@ -177,7 +177,7 @@ class MatrixFederationAgent(object):
         res = yield make_deferred_yieldable(
             agent.request(method, uri, headers, bodyProducer)
         )
-        defer.returnValue(res)
+        return res
 
     @defer.inlineCallbacks
     def _route_matrix_uri(self, parsed_uri, lookup_well_known=True):
@@ -205,24 +205,20 @@ class MatrixFederationAgent(object):
             port = parsed_uri.port
             if port == -1:
                 port = 8448
-            defer.returnValue(
-                _RoutingResult(
-                    host_header=parsed_uri.netloc,
-                    tls_server_name=parsed_uri.host,
-                    target_host=parsed_uri.host,
-                    target_port=port,
-                )
+            return _RoutingResult(
+                host_header=parsed_uri.netloc,
+                tls_server_name=parsed_uri.host,
+                target_host=parsed_uri.host,
+                target_port=port,
             )
 
         if parsed_uri.port != -1:
             # there is an explicit port
-            defer.returnValue(
-                _RoutingResult(
-                    host_header=parsed_uri.netloc,
-                    tls_server_name=parsed_uri.host,
-                    target_host=parsed_uri.host,
-                    target_port=parsed_uri.port,
-                )
+            return _RoutingResult(
+                host_header=parsed_uri.netloc,
+                tls_server_name=parsed_uri.host,
+                target_host=parsed_uri.host,
+                target_port=parsed_uri.port,
             )
 
         if lookup_well_known:
@@ -259,7 +255,7 @@ class MatrixFederationAgent(object):
                 )
 
                 res = yield self._route_matrix_uri(new_uri, lookup_well_known=False)
-                defer.returnValue(res)
+                return res
 
         # try a SRV lookup
         service_name = b"_matrix._tcp.%s" % (parsed_uri.host,)
@@ -283,13 +279,11 @@ class MatrixFederationAgent(object):
                 parsed_uri.host.decode("ascii"),
             )
 
-        defer.returnValue(
-            _RoutingResult(
-                host_header=parsed_uri.netloc,
-                tls_server_name=parsed_uri.host,
-                target_host=target_host,
-                target_port=port,
-            )
+        return _RoutingResult(
+            host_header=parsed_uri.netloc,
+            tls_server_name=parsed_uri.host,
+            target_host=target_host,
+            target_port=port,
         )
 
     @defer.inlineCallbacks
@@ -314,7 +308,7 @@ class MatrixFederationAgent(object):
             if cache_period > 0:
                 self._well_known_cache.set(server_name, result, cache_period)
 
-        defer.returnValue(result)
+        return result
 
     @defer.inlineCallbacks
     def _do_get_well_known(self, server_name):
@@ -354,7 +348,7 @@ class MatrixFederationAgent(object):
             # after startup
             cache_period = WELL_KNOWN_INVALID_CACHE_PERIOD
             cache_period += random.uniform(0, WELL_KNOWN_DEFAULT_CACHE_PERIOD_JITTER)
-            defer.returnValue((None, cache_period))
+            return (None, cache_period)
 
         result = parsed_body["m.server"].encode("ascii")
 
@@ -369,7 +363,7 @@ class MatrixFederationAgent(object):
         else:
             cache_period = min(cache_period, WELL_KNOWN_MAX_CACHE_PERIOD)
 
-        defer.returnValue((result, cache_period))
+        return (result, cache_period)
 
 
 @implementer(IStreamClientEndpoint)

synapse/http/federation/srv_resolver.py

@@ -120,7 +120,7 @@ class SrvResolver(object):
         if cache_entry:
             if all(s.expires > now for s in cache_entry):
                 servers = list(cache_entry)
-                defer.returnValue(servers)
+                return servers
 
         try:
             answers, _, _ = yield make_deferred_yieldable(
@@ -129,7 +129,7 @@ class SrvResolver(object):
         except DNSNameError:
             # TODO: cache this. We can get the SOA out of the exception, and use
             # the negative-TTL value.
-            defer.returnValue([])
+            return []
         except DomainError as e:
             # We failed to resolve the name (other than a NameError)
             # Try something in the cache, else rereaise
@@ -138,7 +138,7 @@ class SrvResolver(object):
                 logger.warn(
                     "Failed to resolve %r, falling back to cache. %r", service_name, e
                 )
-                defer.returnValue(list(cache_entry))
+                return list(cache_entry)
             else:
                 raise e
 
@@ -169,4 +169,4 @@ class SrvResolver(object):
             )
 
         self._cache[service_name] = list(servers)
-        defer.returnValue(servers)
+        return servers

synapse/http/matrixfederationclient.py

@@ -158,7 +158,7 @@ def _handle_json_response(reactor, timeout_sec, request, response):
         response.code,
         response.phrase.decode("ascii", errors="replace"),
     )
-    defer.returnValue(body)
+    return body
 
 
 class MatrixFederationHttpClient(object):
@@ -256,7 +256,7 @@ class MatrixFederationHttpClient(object):
 
             response = yield self._send_request(request, **send_request_args)
 
-        defer.returnValue(response)
+        return response
 
     @defer.inlineCallbacks
     def _send_request(
@@ -520,7 +520,7 @@ class MatrixFederationHttpClient(object):
                         _flatten_response_never_received(e),
                     )
                     raise
-        defer.returnValue(response)
+        return response
 
     def build_auth_headers(
         self, destination, method, url_bytes, content=None, destination_is=None
@@ -644,7 +644,7 @@ class MatrixFederationHttpClient(object):
             self.reactor, self.default_timeout, request, response
         )
 
-        defer.returnValue(body)
+        return body
 
     @defer.inlineCallbacks
     def post_json(
@@ -713,7 +713,7 @@ class MatrixFederationHttpClient(object):
         body = yield _handle_json_response(
             self.reactor, _sec_timeout, request, response
         )
-        defer.returnValue(body)
+        return body
 
     @defer.inlineCallbacks
     def get_json(
@@ -778,7 +778,7 @@ class MatrixFederationHttpClient(object):
             self.reactor, self.default_timeout, request, response
         )
 
-        defer.returnValue(body)
+        return body
 
     @defer.inlineCallbacks
     def delete_json(
@@ -836,7 +836,7 @@ class MatrixFederationHttpClient(object):
         body = yield _handle_json_response(
             self.reactor, self.default_timeout, request, response
         )
-        defer.returnValue(body)
+        return body
 
     @defer.inlineCallbacks
     def get_file(
@@ -902,7 +902,7 @@ class MatrixFederationHttpClient(object):
             response.phrase.decode("ascii", errors="replace"),
             length,
         )
-        defer.returnValue((length, headers))
+        return (length, headers)
 
 
 class _ReadBodyToFileProtocol(protocol.Protocol):

synapse/logging/opentracing.py

@@ -89,7 +89,7 @@ the function becomes the operation name for the span.
        # We start
        yield we_wait
        # we finish
-       defer.returnValue(something_usual_and_useful)
+       return something_usual_and_useful
 
 Operation names can be explicitly set for functions by using
 ``trace_using_operation_name`` and
@@ -113,7 +113,7 @@ Operation names can be explicitly set for functions by using
        # We start
        yield we_wait
        # we finish
-       defer.returnValue(something_usual_and_useful)
+       return something_usual_and_useful
 
 Contexts and carriers
 ---------------------
@@ -694,7 +694,7 @@ def trace_servlet(servlet_name, func):
             },
         ):
             result = yield defer.maybeDeferred(func, request, *args, **kwargs)
-            defer.returnValue(result)
+            return result
 
     return _trace_servlet_inner
 

synapse/module_api/__init__.py

@@ -101,7 +101,7 @@ class ModuleApi(object):
         )
         user_id = yield self.register_user(localpart, displayname, emails)
         _, access_token = yield self.register_device(user_id)
-        defer.returnValue((user_id, access_token))
+        return (user_id, access_token)
 
     def register_user(self, localpart, displayname=None, emails=[]):
         """Registers a new user with given localpart and optional displayname, emails.

synapse/notifier.py

@@ -365,7 +365,7 @@ class Notifier(object):
             current_token = user_stream.current_token
             result = yield callback(prev_token, current_token)
 
-        defer.returnValue(result)
+        return result
 
     @defer.inlineCallbacks
     def get_events_for(
@@ -400,7 +400,7 @@ class Notifier(object):
         @defer.inlineCallbacks
         def check_for_updates(before_token, after_token):
             if not after_token.is_after(before_token):
-                defer.returnValue(EventStreamResult([], (from_token, from_token)))
+                return EventStreamResult([], (from_token, from_token))
 
             events = []
             end_token = from_token
@@ -440,7 +440,7 @@ class Notifier(object):
                 events.extend(new_events)
                 end_token = end_token.copy_and_replace(keyname, new_key)
 
-            defer.returnValue(EventStreamResult(events, (from_token, end_token)))
+            return EventStreamResult(events, (from_token, end_token))
 
         user_id_for_stream = user.to_string()
         if is_peeking:
@@ -465,18 +465,18 @@ class Notifier(object):
             from_token=from_token,
         )
 
-        defer.returnValue(result)
+        return result
 
     @defer.inlineCallbacks
     def _get_room_ids(self, user, explicit_room_id):
         joined_room_ids = yield self.store.get_rooms_for_user(user.to_string())
         if explicit_room_id:
             if explicit_room_id in joined_room_ids:
-                defer.returnValue(([explicit_room_id], True))
+                return ([explicit_room_id], True)
             if (yield self._is_world_readable(explicit_room_id)):
-                defer.returnValue(([explicit_room_id], False))
+                return ([explicit_room_id], False)
             raise AuthError(403, "Non-joined access not allowed")
-        defer.returnValue((joined_room_ids, True))
+        return (joined_room_ids, True)
 
     @defer.inlineCallbacks
     def _is_world_readable(self, room_id):
@@ -484,9 +484,9 @@ class Notifier(object):
             room_id, EventTypes.RoomHistoryVisibility, ""
         )
         if state and "history_visibility" in state.content:
-            defer.returnValue(state.content["history_visibility"] == "world_readable")
+            return state.content["history_visibility"] == "world_readable"
         else:
-            defer.returnValue(False)
+            return False
 
     @log_function
     def remove_expired_streams(self):

synapse/push/bulk_push_rule_evaluator.py

@@ -95,7 +95,7 @@ class BulkPushRuleEvaluator(object):
                         invited
                     )
 
-        defer.returnValue(rules_by_user)
+        return rules_by_user
 
     @cached()
     def _get_rules_for_room(self, room_id):
@@ -134,7 +134,7 @@ class BulkPushRuleEvaluator(object):
 
         pl_event = auth_events.get(POWER_KEY)
 
-        defer.returnValue((pl_event.content if pl_event else {}, sender_level))
+        return (pl_event.content if pl_event else {}, sender_level)
 
     @defer.inlineCallbacks
     def action_for_event_by_user(self, event, context):
@@ -283,13 +283,13 @@ class RulesForRoom(object):
         if state_group and self.state_group == state_group:
             logger.debug("Using cached rules for %r", self.room_id)
             self.room_push_rule_cache_metrics.inc_hits()
-            defer.returnValue(self.rules_by_user)
+            return self.rules_by_user
 
         with (yield self.linearizer.queue(())):
             if state_group and self.state_group == state_group:
                 logger.debug("Using cached rules for %r", self.room_id)
                 self.room_push_rule_cache_metrics.inc_hits()
-                defer.returnValue(self.rules_by_user)
+                return self.rules_by_user
 
             self.room_push_rule_cache_metrics.inc_misses()
 
@@ -366,7 +366,7 @@ class RulesForRoom(object):
             logger.debug(
                 "Returning push rules for %r %r", self.room_id, ret_rules_by_user.keys()
             )
-        defer.returnValue(ret_rules_by_user)
+        return ret_rules_by_user
 
     @defer.inlineCallbacks
     def _update_rules_with_member_event_ids(

synapse/push/httppusher.py

@@ -258,17 +258,17 @@ class HttpPusher(object):
     @defer.inlineCallbacks
     def _process_one(self, push_action):
         if "notify" not in push_action["actions"]:
-            defer.returnValue(True)
+            return True
 
         tweaks = push_rule_evaluator.tweaks_for_actions(push_action["actions"])
         badge = yield push_tools.get_badge_count(self.hs.get_datastore(), self.user_id)
 
         event = yield self.store.get_event(push_action["event_id"], allow_none=True)
         if event is None:
-            defer.returnValue(True)  # It's been redacted
+            return True  # It's been redacted
         rejected = yield self.dispatch_push(event, tweaks, badge)
         if rejected is False:
-            defer.returnValue(False)
+            return False
 
         if isinstance(rejected, list) or isinstance(rejected, tuple):
             for pk in rejected:
@@ -282,7 +282,7 @@ class HttpPusher(object):
                 else:
                     logger.info("Pushkey %s was rejected: removing", pk)
                     yield self.hs.remove_pusher(self.app_id, pk, self.user_id)
-        defer.returnValue(True)
+        return True
 
     @defer.inlineCallbacks
     def _build_notification_dict(self, event, tweaks, badge):
@@ -302,7 +302,7 @@ class HttpPusher(object):
                     ],
                 }
             }
-            defer.returnValue(d)
+            return d
 
         ctx = yield push_tools.get_context_for_event(
             self.store, self.state_handler, event, self.user_id
@@ -345,13 +345,13 @@ class HttpPusher(object):
         if "name" in ctx and len(ctx["name"]) > 0:
             d["notification"]["room_name"] = ctx["name"]
 
-        defer.returnValue(d)
+        return d
 
     @defer.inlineCallbacks
     def dispatch_push(self, event, tweaks, badge):
         notification_dict = yield self._build_notification_dict(event, tweaks, badge)
         if not notification_dict:
-            defer.returnValue([])
+            return []
         try:
             resp = yield self.http_client.post_json_get_json(
                 self.url, notification_dict
@@ -364,11 +364,11 @@ class HttpPusher(object):
                 type(e),
                 e,
             )
-            defer.returnValue(False)
+            return False
         rejected = []
         if "rejected" in resp:
             rejected = resp["rejected"]
-        defer.returnValue(rejected)
+        return rejected
 
     @defer.inlineCallbacks
     def _send_badge(self, badge):

synapse/push/mailer.py

@@ -316,7 +316,7 @@ class Mailer(object):
                 if not merge:
                     room_vars["notifs"].append(notifvars)
 
-        defer.returnValue(room_vars)
+        return room_vars
 
     @defer.inlineCallbacks
     def get_notif_vars(self, notif, user_id, notif_event, room_state_ids):
@@ -343,7 +343,7 @@ class Mailer(object):
             if messagevars is not None:
                 ret["messages"].append(messagevars)
 
-        defer.returnValue(ret)
+        return ret
 
     @defer.inlineCallbacks
     def get_message_vars(self, notif, event, room_state_ids):
@@ -379,7 +379,7 @@ class Mailer(object):
         if "body" in event.content:
             ret["body_text_plain"] = event.content["body"]
 
-        defer.returnValue(ret)
+        return ret
 
     def add_text_message_vars(self, messagevars, event):
         msgformat = event.content.get("format")
@@ -428,19 +428,16 @@ class Mailer(object):
                 inviter_name = name_from_member_event(inviter_member_event)
 
                 if room_name is None:
-                    defer.returnValue(
-                        INVITE_FROM_PERSON
-                        % {"person": inviter_name, "app": self.app_name}
-                    )
+                    return INVITE_FROM_PERSON % {
+                        "person": inviter_name,
+                        "app": self.app_name,
+                    }
                 else:
-                    defer.returnValue(
-                        INVITE_FROM_PERSON_TO_ROOM
-                        % {
-                            "person": inviter_name,
-                            "room": room_name,
-                            "app": self.app_name,
-                        }
-                    )
+                    return INVITE_FROM_PERSON_TO_ROOM % {
+                        "person": inviter_name,
+                        "room": room_name,
+                        "app": self.app_name,
+                    }
 
             sender_name = None
             if len(notifs_by_room[room_id]) == 1:
@@ -454,26 +451,21 @@ class Mailer(object):
                     sender_name = name_from_member_event(state_event)
 
                 if sender_name is not None and room_name is not None:
-                    defer.returnValue(
-                        MESSAGE_FROM_PERSON_IN_ROOM
-                        % {
-                            "person": sender_name,
-                            "room": room_name,
-                            "app": self.app_name,
-                        }
-                    )
+                    return MESSAGE_FROM_PERSON_IN_ROOM % {
+                        "person": sender_name,
+                        "room": room_name,
+                        "app": self.app_name,
+                    }
                 elif sender_name is not None:
-                    defer.returnValue(
-                        MESSAGE_FROM_PERSON
-                        % {"person": sender_name, "app": self.app_name}
-                    )
+                    return MESSAGE_FROM_PERSON % {
+                        "person": sender_name,
+                        "app": self.app_name,
+                    }
             else:
                 # There's more than one notification for this room, so just
                 # say there are several
                 if room_name is not None:
-                    defer.returnValue(
-                        MESSAGES_IN_ROOM % {"room": room_name, "app": self.app_name}
-                    )
+                    return MESSAGES_IN_ROOM % {"room": room_name, "app": self.app_name}
                 else:
                     # If the room doesn't have a name, say who the messages
                     # are from explicitly to avoid, "messages in the Bob room"
@@ -493,24 +485,19 @@ class Mailer(object):
                         ]
                     )
 
-                    defer.returnValue(
-                        MESSAGES_FROM_PERSON
-                        % {
-                            "person": descriptor_from_member_events(
-                                member_events.values()
-                            ),
-                            "app": self.app_name,
-                        }
-                    )
+                    return MESSAGES_FROM_PERSON % {
+                        "person": descriptor_from_member_events(member_events.values()),
+                        "app": self.app_name,
+                    }
         else:
             # Stuff's happened in multiple different rooms
 
             # ...but we still refer to the 'reason' room which triggered the mail
             if reason["room_name"] is not None:
-                defer.returnValue(
-                    MESSAGES_IN_ROOM_AND_OTHERS
-                    % {"room": reason["room_name"], "app": self.app_name}
-                )
+                return MESSAGES_IN_ROOM_AND_OTHERS % {
+                    "room": reason["room_name"],
+                    "app": self.app_name,
+                }
             else:
                 # If the reason room doesn't have a name, say who the messages
                 # are from explicitly to avoid, "messages in the Bob room"
@@ -527,13 +514,10 @@ class Mailer(object):
                     [room_state_ids[room_id][("m.room.member", s)] for s in sender_ids]
                 )
 
-                defer.returnValue(
-                    MESSAGES_FROM_PERSON_AND_OTHERS
-                    % {
-                        "person": descriptor_from_member_events(member_events.values()),
-                        "app": self.app_name,
-                    }
-                )
+                return MESSAGES_FROM_PERSON_AND_OTHERS % {
+                    "person": descriptor_from_member_events(member_events.values()),
+                    "app": self.app_name,
+                }
 
     def make_room_link(self, room_id):
         if self.hs.config.email_riot_base_url:

synapse/push/presentable_names.py

@@ -55,7 +55,7 @@ def calculate_room_name(
             room_state_ids[("m.room.name", "")], allow_none=True
         )
         if m_room_name and m_room_name.content and m_room_name.content["name"]:
-            defer.returnValue(m_room_name.content["name"])
+            return m_room_name.content["name"]
 
     # does it have a canonical alias?
     if ("m.room.canonical_alias", "") in room_state_ids:
@@ -68,7 +68,7 @@ def calculate_room_name(
             and canon_alias.content["alias"]
             and _looks_like_an_alias(canon_alias.content["alias"])
         ):
-            defer.returnValue(canon_alias.content["alias"])
+            return canon_alias.content["alias"]
 
     # at this point we're going to need to search the state by all state keys
     # for an event type, so rearrange the data structure
@@ -82,10 +82,10 @@ def calculate_room_name(
             if alias_event and alias_event.content.get("aliases"):
                 the_aliases = alias_event.content["aliases"]
                 if len(the_aliases) > 0 and _looks_like_an_alias(the_aliases[0]):
-                    defer.returnValue(the_aliases[0])
+                    return the_aliases[0]
 
     if not fallback_to_members:
-        defer.returnValue(None)
+        return None
 
     my_member_event = None
     if ("m.room.member", user_id) in room_state_ids:
@@ -104,14 +104,13 @@ def calculate_room_name(
             )
             if inviter_member_event:
                 if fallback_to_single_member:
-                    defer.returnValue(
-                        "Invite from %s"
-                        % (name_from_member_event(inviter_member_event),)
+                    return "Invite from %s" % (
+                        name_from_member_event(inviter_member_event),
                     )
                 else:
                     return
         else:
-            defer.returnValue("Room Invite")
+            return "Room Invite"
 
     # we're going to have to generate a name based on who's in the room,
     # so find out who is in the room that isn't the user.
@@ -154,17 +153,17 @@ def calculate_room_name(
                         # return "Inviting %s" % (
                         #     descriptor_from_member_events(third_party_invites)
                         # )
-                        defer.returnValue("Inviting email address")
+                        return "Inviting email address"
                     else:
-                        defer.returnValue(ALL_ALONE)
+                        return ALL_ALONE
             else:
-                defer.returnValue(name_from_member_event(all_members[0]))
+                return name_from_member_event(all_members[0])
         else:
-            defer.returnValue(ALL_ALONE)
+            return ALL_ALONE
     elif len(other_members) == 1 and not fallback_to_single_member:
         return
     else:
-        defer.returnValue(descriptor_from_member_events(other_members))
+        return descriptor_from_member_events(other_members)
 
 
 def descriptor_from_member_events(member_events):

synapse/push/push_tools.py

@@ -39,7 +39,7 @@ def get_badge_count(store, user_id):
             # return one badge count per conversation, as count per
             # message is so noisy as to be almost useless
             badge += 1 if notifs["notify_count"] else 0
-    defer.returnValue(badge)
+    return badge
 
 
 @defer.inlineCallbacks
@@ -61,4 +61,4 @@ def get_context_for_event(store, state_handler, ev, user_id):
     sender_state_event = yield store.get_event(sender_state_event_id)
     ctx["sender_display_name"] = name_from_member_event(sender_state_event)
 
-    defer.returnValue(ctx)
+    return ctx

synapse/push/pusherpool.py

@@ -123,7 +123,7 @@ class PusherPool:
         )
         pusher = yield self.start_pusher_by_id(app_id, pushkey, user_id)
 
-        defer.returnValue(pusher)
+        return pusher
 
     @defer.inlineCallbacks
     def remove_pushers_by_app_id_and_pushkey_not_user(
@@ -224,7 +224,7 @@ class PusherPool:
         if pusher_dict:
             pusher = yield self._start_pusher(pusher_dict)
 
-        defer.returnValue(pusher)
+        return pusher
 
     @defer.inlineCallbacks
     def _start_pushers(self):
@@ -293,7 +293,7 @@ class PusherPool:
 
         p.on_started(have_notifs)
 
-        defer.returnValue(p)
+        return p
 
     @defer.inlineCallbacks
     def remove_pusher(self, app_id, pushkey, user_id):

synapse/replication/http/_base.py

@@ -185,7 +185,7 @@ class ReplicationEndpoint(object):
             except RequestSendFailed as e:
                 raise_from(SynapseError(502, "Failed to talk to master"), e)
 
-            defer.returnValue(result)
+            return result
 
         return send_request
 

synapse/replication/http/federation.py

@@ -80,7 +80,7 @@ class ReplicationFederationSendEventsRestServlet(ReplicationEndpoint):
 
         payload = {"events": event_payloads, "backfilled": backfilled}
 
-        defer.returnValue(payload)
+        return payload
 
     @defer.inlineCallbacks
     def _handle_request(self, request):
@@ -113,7 +113,7 @@ class ReplicationFederationSendEventsRestServlet(ReplicationEndpoint):
             event_and_contexts, backfilled
         )
 
-        defer.returnValue((200, {}))
+        return (200, {})
 
 
 class ReplicationFederationSendEduRestServlet(ReplicationEndpoint):
@@ -156,7 +156,7 @@ class ReplicationFederationSendEduRestServlet(ReplicationEndpoint):
 
         result = yield self.registry.on_edu(edu_type, origin, edu_content)
 
-        defer.returnValue((200, result))
+        return (200, result)
 
 
 class ReplicationGetQueryRestServlet(ReplicationEndpoint):
@@ -204,7 +204,7 @@ class ReplicationGetQueryRestServlet(ReplicationEndpoint):
 
         result = yield self.registry.on_query(query_type, args)
 
-        defer.returnValue((200, result))
+        return (200, result)
 
 
 class ReplicationCleanRoomRestServlet(ReplicationEndpoint):
@@ -238,7 +238,7 @@ class ReplicationCleanRoomRestServlet(ReplicationEndpoint):
     def _handle_request(self, request, room_id):
         yield self.store.clean_room_for_join(room_id)
 
-        defer.returnValue((200, {}))
+        return (200, {})
 
 
 def register_servlets(hs, http_server):

synapse/replication/http/login.py

@@ -64,7 +64,7 @@ class RegisterDeviceReplicationServlet(ReplicationEndpoint):
             user_id, device_id, initial_display_name, is_guest
         )
 
-        defer.returnValue((200, {"device_id": device_id, "access_token": access_token}))
+        return (200, {"device_id": device_id, "access_token": access_token})
 
 
 def register_servlets(hs, http_server):

synapse/replication/http/membership.py

@@ -83,7 +83,7 @@ class ReplicationRemoteJoinRestServlet(ReplicationEndpoint):
             remote_room_hosts, room_id, user_id, event_content
         )
 
-        defer.returnValue((200, {}))
+        return (200, {})
 
 
 class ReplicationRemoteRejectInviteRestServlet(ReplicationEndpoint):
@@ -153,7 +153,7 @@ class ReplicationRemoteRejectInviteRestServlet(ReplicationEndpoint):
             yield self.store.locally_reject_invite(user_id, room_id)
             ret = {}
 
-        defer.returnValue((200, ret))
+        return (200, ret)
 
 
 class ReplicationUserJoinedLeftRoomRestServlet(ReplicationEndpoint):

synapse/replication/http/register.py

@@ -90,7 +90,7 @@ class ReplicationRegisterServlet(ReplicationEndpoint):
             address=content["address"],
         )
 
-        defer.returnValue((200, {}))
+        return (200, {})
 
 
 class ReplicationPostRegisterActionsServlet(ReplicationEndpoint):
@@ -143,7 +143,7 @@ class ReplicationPostRegisterActionsServlet(ReplicationEndpoint):
             bind_msisdn=bind_msisdn,
         )
 
-        defer.returnValue((200, {}))
+        return (200, {})
 
 
 def register_servlets(hs, http_server):

synapse/replication/http/send_event.py

@@ -85,7 +85,7 @@ class ReplicationSendEventRestServlet(ReplicationEndpoint):
             "extra_users": [u.to_string() for u in extra_users],
         }
 
-        defer.returnValue(payload)
+        return payload
 
     @defer.inlineCallbacks
     def _handle_request(self, request, event_id):
@@ -117,7 +117,7 @@ class ReplicationSendEventRestServlet(ReplicationEndpoint):
             requester, event, context, ratelimit=ratelimit, extra_users=extra_users
         )
 
-        defer.returnValue((200, {}))
+        return (200, {})
 
 
 def register_servlets(hs, http_server):

synapse/replication/tcp/streams/_base.py

@@ -158,7 +158,7 @@ class Stream(object):
         updates, current_token = yield self.get_updates_since(self.last_token)
         self.last_token = current_token
 
-        defer.returnValue((updates, current_token))
+        return (updates, current_token)
 
     @defer.inlineCallbacks
     def get_updates_since(self, from_token):
@@ -172,14 +172,14 @@ class Stream(object):
                 sent over the replication steam.
         """
         if from_token in ("NOW", "now"):
-            defer.returnValue(([], self.upto_token))
+            return ([], self.upto_token)
 
         current_token = self.upto_token
 
         from_token = int(from_token)
 
         if from_token == current_token:
-            defer.returnValue(([], current_token))
+            return ([], current_token)
 
         if self._LIMITED:
             rows = yield self.update_function(
@@ -198,7 +198,7 @@ class Stream(object):
         if self._LIMITED and len(updates) >= MAX_EVENTS_BEHIND:
             raise Exception("stream %s has fallen behind" % (self.NAME))
 
-        defer.returnValue((updates, current_token))
+        return (updates, current_token)
 
     def current_token(self):
         """Gets the current token of the underlying streams. Should be provided
@@ -297,7 +297,7 @@ class PushRulesStream(Stream):
     @defer.inlineCallbacks
     def update_function(self, from_token, to_token, limit):
         rows = yield self.store.get_all_push_rule_updates(from_token, to_token, limit)
-        defer.returnValue([(row[0], row[2]) for row in rows])
+        return [(row[0], row[2]) for row in rows]
 
 
 class PushersStream(Stream):
@@ -424,7 +424,7 @@ class AccountDataStream(Stream):
             for stream_id, user_id, account_data_type, content in global_results
         )
 
-        defer.returnValue(results)
+        return results
 
 
 class GroupServerStream(Stream):

synapse/replication/tcp/streams/events.py

@@ -134,7 +134,7 @@ class EventsStream(Stream):
 
         all_updates = heapq.merge(event_updates, state_updates)
 
-        defer.returnValue(all_updates)
+        return all_updates
 
     @classmethod
     def parse_row(cls, row):

synapse/rest/admin/__init__.py

@@ -84,7 +84,7 @@ class UsersRestServlet(RestServlet):
 
         ret = yield self.handlers.admin_handler.get_users()
 
-        defer.returnValue((200, ret))
+        return (200, ret)
 
 
 class VersionServlet(RestServlet):
@@ -227,7 +227,7 @@ class UserRegisterServlet(RestServlet):
         )
 
         result = yield register._create_registration_details(user_id, body)
-        defer.returnValue((200, result))
+        return (200, result)
 
 
 class WhoisRestServlet(RestServlet):
@@ -252,7 +252,7 @@ class WhoisRestServlet(RestServlet):
 
         ret = yield self.handlers.admin_handler.get_whois(target_user)
 
-        defer.returnValue((200, ret))
+        return (200, ret)
 
 
 class PurgeMediaCacheRestServlet(RestServlet):
@@ -271,7 +271,7 @@ class PurgeMediaCacheRestServlet(RestServlet):
 
         ret = yield self.media_repository.delete_old_remote_media(before_ts)
 
-        defer.returnValue((200, ret))
+        return (200, ret)
 
 
 class PurgeHistoryRestServlet(RestServlet):
@@ -356,7 +356,7 @@ class PurgeHistoryRestServlet(RestServlet):
             room_id, token, delete_local_events=delete_local_events
         )
 
-        defer.returnValue((200, {"purge_id": purge_id}))
+        return (200, {"purge_id": purge_id})
 
 
 class PurgeHistoryStatusRestServlet(RestServlet):
@@ -381,7 +381,7 @@ class PurgeHistoryStatusRestServlet(RestServlet):
         if purge_status is None:
             raise NotFoundError("purge id '%s' not found" % purge_id)
 
-        defer.returnValue((200, purge_status.asdict()))
+        return (200, purge_status.asdict())
 
 
 class DeactivateAccountRestServlet(RestServlet):
@@ -413,7 +413,7 @@ class DeactivateAccountRestServlet(RestServlet):
         else:
             id_server_unbind_result = "no-support"
 
-        defer.returnValue((200, {"id_server_unbind_result": id_server_unbind_result}))
+        return (200, {"id_server_unbind_result": id_server_unbind_result})
 
 
 class ShutdownRoomRestServlet(RestServlet):
@@ -531,16 +531,14 @@ class ShutdownRoomRestServlet(RestServlet):
             room_id, new_room_id, requester_user_id
         )
 
-        defer.returnValue(
-            (
-                200,
-                {
-                    "kicked_users": kicked_users,
-                    "failed_to_kick_users": failed_to_kick_users,
-                    "local_aliases": aliases_for_room,
-                    "new_room_id": new_room_id,
-                },
-            )
+        return (
+            200,
+            {
+                "kicked_users": kicked_users,
+                "failed_to_kick_users": failed_to_kick_users,
+                "local_aliases": aliases_for_room,
+                "new_room_id": new_room_id,
+            },
         )
 
 
@@ -564,7 +562,7 @@ class QuarantineMediaInRoom(RestServlet):
             room_id, requester.user.to_string()
         )
 
-        defer.returnValue((200, {"num_quarantined": num_quarantined}))
+        return (200, {"num_quarantined": num_quarantined})
 
 
 class ListMediaInRoom(RestServlet):
@@ -585,7 +583,7 @@ class ListMediaInRoom(RestServlet):
 
         local_mxcs, remote_mxcs = yield self.store.get_media_mxcs_in_room(room_id)
 
-        defer.returnValue((200, {"local": local_mxcs, "remote": remote_mxcs}))
+        return (200, {"local": local_mxcs, "remote": remote_mxcs})
 
 
 class ResetPasswordRestServlet(RestServlet):
@@ -629,7 +627,7 @@ class ResetPasswordRestServlet(RestServlet):
         yield self._set_password_handler.set_password(
             target_user_id, new_password, requester
         )
-        defer.returnValue((200, {}))
+        return (200, {})
 
 
 class GetUsersPaginatedRestServlet(RestServlet):
@@ -671,7 +669,7 @@ class GetUsersPaginatedRestServlet(RestServlet):
         logger.info("limit: %s, start: %s", limit, start)
 
         ret = yield self.handlers.admin_handler.get_users_paginate(order, start, limit)
-        defer.returnValue((200, ret))
+        return (200, ret)
 
     @defer.inlineCallbacks
     def on_POST(self, request, target_user_id):
@@ -699,7 +697,7 @@ class GetUsersPaginatedRestServlet(RestServlet):
         logger.info("limit: %s, start: %s", limit, start)
 
         ret = yield self.handlers.admin_handler.get_users_paginate(order, start, limit)
-        defer.returnValue((200, ret))
+        return (200, ret)
 
 
 class SearchUsersRestServlet(RestServlet):
@@ -742,7 +740,7 @@ class SearchUsersRestServlet(RestServlet):
         logger.info("term: %s ", term)
 
         ret = yield self.handlers.admin_handler.search_users(term)
-        defer.returnValue((200, ret))
+        return (200, ret)
 
 
 class DeleteGroupAdminRestServlet(RestServlet):
@@ -765,7 +763,7 @@ class DeleteGroupAdminRestServlet(RestServlet):
             raise SynapseError(400, "Can only delete local groups")
 
         yield self.group_server.delete_group(group_id, requester.user.to_string())
-        defer.returnValue((200, {}))
+        return (200, {})
 
 
 class AccountValidityRenewServlet(RestServlet):
@@ -796,7 +794,7 @@ class AccountValidityRenewServlet(RestServlet):
         )
 
         res = {"expiration_ts": expiration_ts}
-        defer.returnValue((200, res))
+        return (200, res)
 
 
 ########################################################################################

synapse/rest/admin/server_notice_servlet.py

@@ -87,7 +87,7 @@ class SendServerNoticeServlet(RestServlet):
             event_content=body["content"],
         )
 
-        defer.returnValue((200, {"event_id": event.event_id}))
+        return (200, {"event_id": event.event_id})
 
     def on_PUT(self, request, txn_id):
         return self.txns.fetch_or_execute_request(

synapse/rest/client/v1/directory.py

@@ -54,7 +54,7 @@ class ClientDirectoryServer(RestServlet):
         dir_handler = self.handlers.directory_handler
         res = yield dir_handler.get_association(room_alias)
 
-        defer.returnValue((200, res))
+        return (200, res)
 
     @defer.inlineCallbacks
     def on_PUT(self, request, room_alias):
@@ -87,7 +87,7 @@ class ClientDirectoryServer(RestServlet):
             requester, room_alias, room_id, servers
         )
 
-        defer.returnValue((200, {}))
+        return (200, {})
 
     @defer.inlineCallbacks
     def on_DELETE(self, request, room_alias):
@@ -102,7 +102,7 @@ class ClientDirectoryServer(RestServlet):
                 service.url,
                 room_alias.to_string(),
             )
-            defer.returnValue((200, {}))
+            return (200, {})
         except InvalidClientCredentialsError:
             # fallback to default user behaviour if they aren't an AS
             pass
@@ -118,7 +118,7 @@ class ClientDirectoryServer(RestServlet):
             "User %s deleted alias %s", user.to_string(), room_alias.to_string()
         )
 
-        defer.returnValue((200, {}))
+        return (200, {})
 
 
 class ClientDirectoryListServer(RestServlet):
@@ -136,9 +136,7 @@ class ClientDirectoryListServer(RestServlet):
         if room is None:
             raise NotFoundError("Unknown room")
 
-        defer.returnValue(
-            (200, {"visibility": "public" if room["is_public"] else "private"})
-        )
+        return (200, {"visibility": "public" if room["is_public"] else "private"})
 
     @defer.inlineCallbacks
     def on_PUT(self, request, room_id):
@@ -151,7 +149,7 @@ class ClientDirectoryListServer(RestServlet):
             requester, room_id, visibility
         )
 
-        defer.returnValue((200, {}))
+        return (200, {})
 
     @defer.inlineCallbacks
     def on_DELETE(self, request, room_id):
@@ -161,7 +159,7 @@ class ClientDirectoryListServer(RestServlet):
             requester, room_id, "private"
         )
 
-        defer.returnValue((200, {}))
+        return (200, {})
 
 
 class ClientAppserviceDirectoryListServer(RestServlet):
@@ -195,4 +193,4 @@ class ClientAppserviceDirectoryListServer(RestServlet):
             requester.app_service.id, network_id, room_id, visibility
         )
 
-        defer.returnValue((200, {}))
+        return (200, {})

synapse/rest/client/v1/events.py

@@ -67,7 +67,7 @@ class EventStreamRestServlet(RestServlet):
             is_guest=is_guest,
         )
 
-        defer.returnValue((200, chunk))
+        return (200, chunk)
 
     def on_OPTIONS(self, request):
         return (200, {})
@@ -91,9 +91,9 @@ class EventRestServlet(RestServlet):
         time_now = self.clock.time_msec()
         if event:
             event = yield self._event_serializer.serialize_event(event, time_now)
-            defer.returnValue((200, event))
+            return (200, event)
         else:
-            defer.returnValue((404, "Event not found."))
+            return (404, "Event not found.")
 
 
 def register_servlets(hs, http_server):

synapse/rest/client/v1/initial_sync.py

@@ -42,7 +42,7 @@ class InitialSyncRestServlet(RestServlet):
             include_archived=include_archived,
         )
 
-        defer.returnValue((200, content))
+        return (200, content)
 
 
 def register_servlets(hs, http_server):

synapse/rest/client/v1/login.py

@@ -152,7 +152,7 @@ class LoginRestServlet(RestServlet):
         well_known_data = self._well_known_builder.get_well_known()
         if well_known_data:
             result["well_known"] = well_known_data
-        defer.returnValue((200, result))
+        return (200, result)
 
     @defer.inlineCallbacks
     def _do_other_login(self, login_submission):
@@ -212,7 +212,7 @@ class LoginRestServlet(RestServlet):
                 result = yield self._register_device_with_callback(
                     canonical_user_id, login_submission, callback_3pid
                 )
-                defer.returnValue(result)
+                return result
 
             # No password providers were able to handle this 3pid
             # Check local store
@@ -241,7 +241,7 @@ class LoginRestServlet(RestServlet):
         result = yield self._register_device_with_callback(
             canonical_user_id, login_submission, callback
         )
-        defer.returnValue(result)
+        return result
 
     @defer.inlineCallbacks
     def _register_device_with_callback(self, user_id, login_submission, callback=None):
@@ -273,7 +273,7 @@ class LoginRestServlet(RestServlet):
         if callback is not None:
             yield callback(result)
 
-        defer.returnValue(result)
+        return result
 
     @defer.inlineCallbacks
     def do_token_login(self, login_submission):
@@ -284,7 +284,7 @@ class LoginRestServlet(RestServlet):
         )
 
         result = yield self._register_device_with_callback(user_id, login_submission)
-        defer.returnValue(result)
+        return result
 
     @defer.inlineCallbacks
     def do_jwt_login(self, login_submission):
@@ -321,7 +321,7 @@ class LoginRestServlet(RestServlet):
         result = yield self._register_device_with_callback(
             registered_user_id, login_submission
         )
-        defer.returnValue(result)
+        return result
 
 
 class BaseSSORedirectServlet(RestServlet):
@@ -395,7 +395,7 @@ class CasTicketServlet(RestServlet):
             # even if that's being used old-http style to signal end-of-data
             body = pde.response
         result = yield self.handle_cas_response(request, body, client_redirect_url)
-        defer.returnValue(result)
+        return result
 
     def handle_cas_response(self, request, cas_response_body, client_redirect_url):
         user, attributes = self.parse_cas_response(cas_response_body)

synapse/rest/client/v1/logout.py

@@ -49,7 +49,7 @@ class LogoutRestServlet(RestServlet):
                 requester.user.to_string(), requester.device_id
             )
 
-        defer.returnValue((200, {}))
+        return (200, {})
 
 
 class LogoutAllRestServlet(RestServlet):
@@ -75,7 +75,7 @@ class LogoutAllRestServlet(RestServlet):
         # .. and then delete any access tokens which weren't associated with
         # devices.
         yield self._auth_handler.delete_access_tokens_for_user(user_id)
-        defer.returnValue((200, {}))
+        return (200, {})
 
 
 def register_servlets(hs, http_server):

synapse/rest/client/v1/presence.py

@@ -56,7 +56,7 @@ class PresenceStatusRestServlet(RestServlet):
         state = yield self.presence_handler.get_state(target_user=user)
         state = format_user_presence_state(state, self.clock.time_msec())
 
-        defer.returnValue((200, state))
+        return (200, state)
 
     @defer.inlineCallbacks
     def on_PUT(self, request, user_id):
@@ -88,7 +88,7 @@ class PresenceStatusRestServlet(RestServlet):
         if self.hs.config.use_presence:
             yield self.presence_handler.set_state(user, state)
 
-        defer.returnValue((200, {}))
+        return (200, {})
 
     def on_OPTIONS(self, request):
         return (200, {})

synapse/rest/client/v1/profile.py

@@ -48,7 +48,7 @@ class ProfileDisplaynameRestServlet(RestServlet):
         if displayname is not None:
             ret["displayname"] = displayname
 
-        defer.returnValue((200, ret))
+        return (200, ret)
 
     @defer.inlineCallbacks
     def on_PUT(self, request, user_id):
@@ -61,11 +61,11 @@ class ProfileDisplaynameRestServlet(RestServlet):
         try:
             new_name = content["displayname"]
         except Exception:
-            defer.returnValue((400, "Unable to parse name"))
+            return (400, "Unable to parse name")
 
         yield self.profile_handler.set_displayname(user, requester, new_name, is_admin)
 
-        defer.returnValue((200, {}))
+        return (200, {})
 
     def on_OPTIONS(self, request, user_id):
         return (200, {})
@@ -98,7 +98,7 @@ class ProfileAvatarURLRestServlet(RestServlet):
         if avatar_url is not None:
             ret["avatar_url"] = avatar_url
 
-        defer.returnValue((200, ret))
+        return (200, ret)
 
     @defer.inlineCallbacks
     def on_PUT(self, request, user_id):
@@ -110,11 +110,11 @@ class ProfileAvatarURLRestServlet(RestServlet):
         try:
             new_name = content["avatar_url"]
         except Exception:
-            defer.returnValue((400, "Unable to parse name"))
+            return (400, "Unable to parse name")
 
         yield self.profile_handler.set_avatar_url(user, requester, new_name, is_admin)
 
-        defer.returnValue((200, {}))
+        return (200, {})
 
     def on_OPTIONS(self, request, user_id):
         return (200, {})
@@ -150,7 +150,7 @@ class ProfileRestServlet(RestServlet):
         if avatar_url is not None:
             ret["avatar_url"] = avatar_url
 
-        defer.returnValue((200, ret))
+        return (200, ret)
 
 
 def register_servlets(hs, http_server):

synapse/rest/client/v1/push_rule.py

@@ -69,7 +69,7 @@ class PushRuleRestServlet(RestServlet):
         if "attr" in spec:
             yield self.set_rule_attr(user_id, spec, content)
             self.notify_user(user_id)
-            defer.returnValue((200, {}))
+            return (200, {})
 
         if spec["rule_id"].startswith("."):
             # Rule ids starting with '.' are reserved for server default rules.
@@ -106,7 +106,7 @@ class PushRuleRestServlet(RestServlet):
         except RuleNotFoundException as e:
             raise SynapseError(400, str(e))
 
-        defer.returnValue((200, {}))
+        return (200, {})
 
     @defer.inlineCallbacks
     def on_DELETE(self, request, path):
@@ -123,7 +123,7 @@ class PushRuleRestServlet(RestServlet):
         try:
             yield self.store.delete_push_rule(user_id, namespaced_rule_id)
             self.notify_user(user_id)
-            defer.returnValue((200, {}))
+            return (200, {})
         except StoreError as e:
             if e.code == 404:
                 raise NotFoundError()
@@ -151,10 +151,10 @@ class PushRuleRestServlet(RestServlet):
             )
 
         if path[0] == "":
-            defer.returnValue((200, rules))
+            return (200, rules)
         elif path[0] == "global":
             result = _filter_ruleset_with_path(rules["global"], path[1:])
-            defer.returnValue((200, result))
+            return (200, result)
         else:
             raise UnrecognizedRequestError()
 

synapse/rest/client/v1/pusher.py

@@ -62,7 +62,7 @@ class PushersRestServlet(RestServlet):
                 if k not in allowed_keys:
                     del p[k]
 
-        defer.returnValue((200, {"pushers": pushers}))
+        return (200, {"pushers": pushers})
 
     def on_OPTIONS(self, _):
         return 200, {}
@@ -94,7 +94,7 @@ class PushersSetRestServlet(RestServlet):
             yield self.pusher_pool.remove_pusher(
                 content["app_id"], content["pushkey"], user_id=user.to_string()
             )
-            defer.returnValue((200, {}))
+            return (200, {})
 
         assert_params_in_dict(
             content,
@@ -143,7 +143,7 @@ class PushersSetRestServlet(RestServlet):
 
         self.notifier.on_new_replication_data()
 
-        defer.returnValue((200, {}))
+        return (200, {})
 
     def on_OPTIONS(self, _):
         return 200, {}
@@ -190,7 +190,7 @@ class PushersRemoveRestServlet(RestServlet):
         )
         request.write(PushersRemoveRestServlet.SUCCESS_HTML)
         finish_request(request)
-        defer.returnValue(None)
+        return None
 
     def on_OPTIONS(self, _):
         return 200, {}

synapse/rest/client/v1/room.py

@@ -85,7 +85,7 @@ class RoomCreateRestServlet(TransactionRestServlet):
             requester, self.get_room_config(request)
         )
 
-        defer.returnValue((200, info))
+        return (200, info)
 
     def get_room_config(self, request):
         user_supplied_config = parse_json_object_from_request(request)
@@ -155,9 +155,9 @@ class RoomStateEventRestServlet(TransactionRestServlet):
 
         if format == "event":
             event = format_event_for_client_v2(data.get_dict())
-            defer.returnValue((200, event))
+            return (200, event)
         elif format == "content":
-            defer.returnValue((200, data.get_dict()["content"]))
+            return (200, data.get_dict()["content"])
 
     @defer.inlineCallbacks
     def on_PUT(self, request, room_id, event_type, state_key, txn_id=None):
@@ -192,7 +192,7 @@ class RoomStateEventRestServlet(TransactionRestServlet):
         ret = {}
         if event:
             ret = {"event_id": event.event_id}
-        defer.returnValue((200, ret))
+        return (200, ret)
 
 
 # TODO: Needs unit testing for generic events + feedback
@@ -226,7 +226,7 @@ class RoomSendEventRestServlet(TransactionRestServlet):
             requester, event_dict, txn_id=txn_id
         )
 
-        defer.returnValue((200, {"event_id": event.event_id}))
+        return (200, {"event_id": event.event_id})
 
     def on_GET(self, request, room_id, event_type, txn_id):
         return (200, "Not implemented")
@@ -289,7 +289,7 @@ class JoinRoomAliasServlet(TransactionRestServlet):
             third_party_signed=content.get("third_party_signed", None),
         )
 
-        defer.returnValue((200, {"room_id": room_id}))
+        return (200, {"room_id": room_id})
 
     def on_PUT(self, request, room_identifier, txn_id):
         return self.txns.fetch_or_execute_request(
@@ -342,7 +342,7 @@ class PublicRoomListRestServlet(TransactionRestServlet):
                 limit=limit, since_token=since_token
             )
 
-        defer.returnValue((200, data))
+        return (200, data)
 
     @defer.inlineCallbacks
     def on_POST(self, request):
@@ -387,7 +387,7 @@ class PublicRoomListRestServlet(TransactionRestServlet):
                 network_tuple=network_tuple,
             )
 
-        defer.returnValue((200, data))
+        return (200, data)
 
 
 # TODO: Needs unit testing
@@ -438,7 +438,7 @@ class RoomMemberListRestServlet(RestServlet):
                 continue
             chunk.append(event)
 
-        defer.returnValue((200, {"chunk": chunk}))
+        return (200, {"chunk": chunk})
 
 
 # deprecated in favour of /members?membership=join?
@@ -459,7 +459,7 @@ class JoinedRoomMemberListRestServlet(RestServlet):
             requester, room_id
         )
 
-        defer.returnValue((200, {"joined": users_with_profile}))
+        return (200, {"joined": users_with_profile})
 
 
 # TODO: Needs better unit testing
@@ -492,7 +492,7 @@ class RoomMessageListRestServlet(RestServlet):
             event_filter=event_filter,
         )
 
-        defer.returnValue((200, msgs))
+        return (200, msgs)
 
 
 # TODO: Needs unit testing
@@ -513,7 +513,7 @@ class RoomStateRestServlet(RestServlet):
             user_id=requester.user.to_string(),
             is_guest=requester.is_guest,
         )
-        defer.returnValue((200, events))
+        return (200, events)
 
 
 # TODO: Needs unit testing
@@ -532,7 +532,7 @@ class RoomInitialSyncRestServlet(RestServlet):
         content = yield self.initial_sync_handler.room_initial_sync(
             room_id=room_id, requester=requester, pagin_config=pagination_config
         )
-        defer.returnValue((200, content))
+        return (200, content)
 
 
 class RoomEventServlet(RestServlet):
@@ -555,9 +555,9 @@ class RoomEventServlet(RestServlet):
         time_now = self.clock.time_msec()
         if event:
             event = yield self._event_serializer.serialize_event(event, time_now)
-            defer.returnValue((200, event))
+            return (200, event)
         else:
-            defer.returnValue((404, "Event not found."))
+            return (404, "Event not found.")
 
 
 class RoomEventContextServlet(RestServlet):
@@ -607,7 +607,7 @@ class RoomEventContextServlet(RestServlet):
             results["state"], time_now
         )
 
-        defer.returnValue((200, results))
+        return (200, results)
 
 
 class RoomForgetRestServlet(TransactionRestServlet):
@@ -626,7 +626,7 @@ class RoomForgetRestServlet(TransactionRestServlet):
 
         yield self.room_member_handler.forget(user=requester.user, room_id=room_id)
 
-        defer.returnValue((200, {}))
+        return (200, {})
 
     def on_PUT(self, request, room_id, txn_id):
         return self.txns.fetch_or_execute_request(
@@ -676,7 +676,7 @@ class RoomMembershipRestServlet(TransactionRestServlet):
                 requester,
                 txn_id,
             )
-            defer.returnValue((200, {}))
+            return (200, {})
             return
 
         target = requester.user
@@ -703,7 +703,7 @@ class RoomMembershipRestServlet(TransactionRestServlet):
         if membership_action == "join":
             return_value["room_id"] = room_id
 
-        defer.returnValue((200, return_value))
+        return (200, return_value)
 
     def _has_3pid_invite_keys(self, content):
         for key in {"id_server", "medium", "address"}:
@@ -745,7 +745,7 @@ class RoomRedactEventRestServlet(TransactionRestServlet):
             txn_id=txn_id,
         )
 
-        defer.returnValue((200, {"event_id": event.event_id}))
+        return (200, {"event_id": event.event_id})
 
     def on_PUT(self, request, room_id, event_id, txn_id):
         return self.txns.fetch_or_execute_request(
@@ -790,7 +790,7 @@ class RoomTypingRestServlet(RestServlet):
                 target_user=target_user, auth_user=requester.user, room_id=room_id
             )
 
-        defer.returnValue((200, {}))
+        return (200, {})
 
 
 class SearchRestServlet(RestServlet):
@@ -812,7 +812,7 @@ class SearchRestServlet(RestServlet):
             requester.user, content, batch
         )
 
-        defer.returnValue((200, results))
+        return (200, results)
 
 
 class JoinedRoomsRestServlet(RestServlet):
@@ -828,7 +828,7 @@ class JoinedRoomsRestServlet(RestServlet):
         requester = yield self.auth.get_user_by_req(request, allow_guest=True)
 
         room_ids = yield self.store.get_rooms_for_user(requester.user.to_string())
-        defer.returnValue((200, {"joined_rooms": list(room_ids)}))
+        return (200, {"joined_rooms": list(room_ids)})
 
 
 def register_txn_path(servlet, regex_string, http_server, with_get=False):

synapse/rest/client/v1/voip.py

@@ -60,18 +60,16 @@ class VoipRestServlet(RestServlet):
             password = turnPassword
 
         else:
-            defer.returnValue((200, {}))
-
-        defer.returnValue(
-            (
-                200,
-                {
-                    "username": username,
-                    "password": password,
-                    "ttl": userLifetime / 1000,
-                    "uris": turnUris,
-                },
-            )
+            return (200, {})
+
+        return (
+            200,
+            {
+                "username": username,
+                "password": password,
+                "ttl": userLifetime / 1000,
+                "uris": turnUris,
+            },
         )
 
     def on_OPTIONS(self, request):

synapse/rest/client/v2_alpha/account.py

@@ -117,7 +117,7 @@ class EmailPasswordRequestTokenRestServlet(RestServlet):
             # Wrap the session id in a JSON object
             ret = {"sid": sid}
 
-        defer.returnValue((200, ret))
+        return (200, ret)
 
     @defer.inlineCallbacks
     def send_password_reset(self, email, client_secret, send_attempt, next_link=None):
@@ -149,7 +149,7 @@ class EmailPasswordRequestTokenRestServlet(RestServlet):
             # Check that the send_attempt is higher than previous attempts
             if send_attempt <= last_send_attempt:
                 # If not, just return a success without sending an email
-                defer.returnValue(session_id)
+                return session_id
         else:
             # An non-validated session does not exist yet.
             # Generate a session id
@@ -185,7 +185,7 @@ class EmailPasswordRequestTokenRestServlet(RestServlet):
             token_expires,
         )
 
-        defer.returnValue(session_id)
+        return session_id
 
 
 class MsisdnPasswordRequestTokenRestServlet(RestServlet):
@@ -221,7 +221,7 @@ class MsisdnPasswordRequestTokenRestServlet(RestServlet):
             raise SynapseError(400, "MSISDN not found", Codes.THREEPID_NOT_FOUND)
 
         ret = yield self.identity_handler.requestMsisdnToken(**body)
-        defer.returnValue((200, ret))
+        return (200, ret)
 
 
 class PasswordResetSubmitTokenServlet(RestServlet):
@@ -279,7 +279,7 @@ class PasswordResetSubmitTokenServlet(RestServlet):
                     request.setResponseCode(302)
                     request.setHeader("Location", next_link)
                     finish_request(request)
-                    defer.returnValue(None)
+                    return None
 
             # Otherwise show the success template
             html = self.config.email_password_reset_success_html_content
@@ -295,7 +295,7 @@ class PasswordResetSubmitTokenServlet(RestServlet):
 
         request.write(html.encode("utf-8"))
         finish_request(request)
-        defer.returnValue(None)
+        return None
 
     def load_jinja2_template(self, template_dir, template_filename, template_vars):
         """Loads a jinja2 template with variables to insert
@@ -330,7 +330,7 @@ class PasswordResetSubmitTokenServlet(RestServlet):
         )
         response_code = 200 if valid else 400
 
-        defer.returnValue((response_code, {"success": valid}))
+        return (response_code, {"success": valid})
 
 
 class PasswordRestServlet(RestServlet):
@@ -399,7 +399,7 @@ class PasswordRestServlet(RestServlet):
 
         yield self._set_password_handler.set_password(user_id, new_password, requester)
 
-        defer.returnValue((200, {}))
+        return (200, {})
 
     def on_OPTIONS(self, _):
         return 200, {}
@@ -434,7 +434,7 @@ class DeactivateAccountRestServlet(RestServlet):
             yield self._deactivate_account_handler.deactivate_account(
                 requester.user.to_string(), erase
             )
-            defer.returnValue((200, {}))
+            return (200, {})
 
         yield self.auth_handler.validate_user_via_ui_auth(
             requester, body, self.hs.get_ip_from_request(request)
@@ -447,7 +447,7 @@ class DeactivateAccountRestServlet(RestServlet):
         else:
             id_server_unbind_result = "no-support"
 
-        defer.returnValue((200, {"id_server_unbind_result": id_server_unbind_result}))
+        return (200, {"id_server_unbind_result": id_server_unbind_result})
 
 
 class EmailThreepidRequestTokenRestServlet(RestServlet):
@@ -481,7 +481,7 @@ class EmailThreepidRequestTokenRestServlet(RestServlet):
             raise SynapseError(400, "Email is already in use", Codes.THREEPID_IN_USE)
 
         ret = yield self.identity_handler.requestEmailToken(**body)
-        defer.returnValue((200, ret))
+        return (200, ret)
 
 
 class MsisdnThreepidRequestTokenRestServlet(RestServlet):
@@ -516,7 +516,7 @@ class MsisdnThreepidRequestTokenRestServlet(RestServlet):
             raise SynapseError(400, "MSISDN is already in use", Codes.THREEPID_IN_USE)
 
         ret = yield self.identity_handler.requestMsisdnToken(**body)
-        defer.returnValue((200, ret))
+        return (200, ret)
 
 
 class ThreepidRestServlet(RestServlet):
@@ -536,7 +536,7 @@ class ThreepidRestServlet(RestServlet):
 
         threepids = yield self.datastore.user_get_threepids(requester.user.to_string())
 
-        defer.returnValue((200, {"threepids": threepids}))
+        return (200, {"threepids": threepids})
 
     @defer.inlineCallbacks
     def on_POST(self, request):
@@ -568,7 +568,7 @@ class ThreepidRestServlet(RestServlet):
             logger.debug("Binding threepid %s to %s", threepid, user_id)
             yield self.identity_handler.bind_threepid(threePidCreds, user_id)
 
-        defer.returnValue((200, {}))
+        return (200, {})
 
 
 class ThreepidDeleteRestServlet(RestServlet):
@@ -603,7 +603,7 @@ class ThreepidDeleteRestServlet(RestServlet):
         else:
             id_server_unbind_result = "no-support"
 
-        defer.returnValue((200, {"id_server_unbind_result": id_server_unbind_result}))
+        return (200, {"id_server_unbind_result": id_server_unbind_result})
 
 
 class WhoamiRestServlet(RestServlet):
@@ -617,7 +617,7 @@ class WhoamiRestServlet(RestServlet):
     def on_GET(self, request):
         requester = yield self.auth.get_user_by_req(request)
 
-        defer.returnValue((200, {"user_id": requester.user.to_string()}))
+        return (200, {"user_id": requester.user.to_string()})
 
 
 def register_servlets(hs, http_server):

synapse/rest/client/v2_alpha/account_data.py

@@ -55,7 +55,7 @@ class AccountDataServlet(RestServlet):
 
         self.notifier.on_new_event("account_data_key", max_id, users=[user_id])
 
-        defer.returnValue((200, {}))
+        return (200, {})
 
     @defer.inlineCallbacks
     def on_GET(self, request, user_id, account_data_type):
@@ -70,7 +70,7 @@ class AccountDataServlet(RestServlet):
         if event is None:
             raise NotFoundError("Account data not found")
 
-        defer.returnValue((200, event))
+        return (200, event)
 
 
 class RoomAccountDataServlet(RestServlet):
@@ -112,7 +112,7 @@ class RoomAccountDataServlet(RestServlet):
 
         self.notifier.on_new_event("account_data_key", max_id, users=[user_id])
 
-        defer.returnValue((200, {}))
+        return (200, {})
 
     @defer.inlineCallbacks
     def on_GET(self, request, user_id, room_id, account_data_type):
@@ -127,7 +127,7 @@ class RoomAccountDataServlet(RestServlet):
         if event is None:
             raise NotFoundError("Room account data not found")
 
-        defer.returnValue((200, event))
+        return (200, event)
 
 
 def register_servlets(hs, http_server):

synapse/rest/client/v2_alpha/account_validity.py

@@ -58,7 +58,7 @@ class AccountValidityRenewServlet(RestServlet):
         )
         request.write(AccountValidityRenewServlet.SUCCESS_HTML)
         finish_request(request)
-        defer.returnValue(None)
+        return None
 
 
 class AccountValiditySendMailServlet(RestServlet):
@@ -87,7 +87,7 @@ class AccountValiditySendMailServlet(RestServlet):
         user_id = requester.user.to_string()
         yield self.account_activity_handler.send_renewal_email_to_user(user_id)
 
-        defer.returnValue((200, {}))
+        return (200, {})
 
 
 def register_servlets(hs, http_server):

synapse/rest/client/v2_alpha/auth.py

@@ -207,7 +207,7 @@ class AuthRestServlet(RestServlet):
             request.write(html_bytes)
             finish_request(request)
 
-            defer.returnValue(None)
+            return None
         elif stagetype == LoginType.TERMS:
             if ("session" not in request.args or len(request.args["session"])) == 0:
                 raise SynapseError(400, "No session supplied")
@@ -239,7 +239,7 @@ class AuthRestServlet(RestServlet):
 
             request.write(html_bytes)
             finish_request(request)
-            defer.returnValue(None)
+            return None
         else:
             raise SynapseError(404, "Unknown auth stage type")
 

synapse/rest/client/v2_alpha/capabilities.py

@@ -58,7 +58,7 @@ class CapabilitiesRestServlet(RestServlet):
                 "m.change_password": {"enabled": change_password},
             }
         }
-        defer.returnValue((200, response))
+        return (200, response)
 
 
 def register_servlets(hs, http_server):

synapse/rest/client/v2_alpha/devices.py

@@ -48,7 +48,7 @@ class DevicesRestServlet(RestServlet):
         devices = yield self.device_handler.get_devices_by_user(
             requester.user.to_string()
         )
-        defer.returnValue((200, {"devices": devices}))
+        return (200, {"devices": devices})
 
 
 class DeleteDevicesRestServlet(RestServlet):
@@ -91,7 +91,7 @@ class DeleteDevicesRestServlet(RestServlet):
         yield self.device_handler.delete_devices(
             requester.user.to_string(), body["devices"]
         )
-        defer.returnValue((200, {}))
+        return (200, {})
 
 
 class DeviceRestServlet(RestServlet):
@@ -114,7 +114,7 @@ class DeviceRestServlet(RestServlet):
         device = yield self.device_handler.get_device(
             requester.user.to_string(), device_id
         )
-        defer.returnValue((200, device))
+        return (200, device)
 
     @interactive_auth_handler
     @defer.inlineCallbacks
@@ -137,7 +137,7 @@ class DeviceRestServlet(RestServlet):
         )
 
         yield self.device_handler.delete_device(requester.user.to_string(), device_id)
-        defer.returnValue((200, {}))
+        return (200, {})
 
     @defer.inlineCallbacks
     def on_PUT(self, request, device_id):
@@ -147,7 +147,7 @@ class DeviceRestServlet(RestServlet):
         yield self.device_handler.update_device(
             requester.user.to_string(), device_id, body
         )
-        defer.returnValue((200, {}))
+        return (200, {})
 
 
 def register_servlets(hs, http_server):

synapse/rest/client/v2_alpha/filter.py

@@ -56,7 +56,7 @@ class GetFilterRestServlet(RestServlet):
                 user_localpart=target_user.localpart, filter_id=filter_id
             )
 
-            defer.returnValue((200, filter.get_filter_json()))
+            return (200, filter.get_filter_json())
         except (KeyError, StoreError):
             raise SynapseError(400, "No such filter", errcode=Codes.NOT_FOUND)
 
@@ -89,7 +89,7 @@ class CreateFilterRestServlet(RestServlet):
             user_localpart=target_user.localpart, user_filter=content
         )
 
-        defer.returnValue((200, {"filter_id": str(filter_id)}))
+        return (200, {"filter_id": str(filter_id)})
 
 
 def register_servlets(hs, http_server):

synapse/rest/client/v2_alpha/groups.py

@@ -47,7 +47,7 @@ class GroupServlet(RestServlet):
             group_id, requester_user_id
         )
 
-        defer.returnValue((200, group_description))
+        return (200, group_description)
 
     @defer.inlineCallbacks
     def on_POST(self, request, group_id):
@@ -59,7 +59,7 @@ class GroupServlet(RestServlet):
             group_id, requester_user_id, content
         )
 
-        defer.returnValue((200, {}))
+        return (200, {})
 
 
 class GroupSummaryServlet(RestServlet):
@@ -83,7 +83,7 @@ class GroupSummaryServlet(RestServlet):
             group_id, requester_user_id
         )
 
-        defer.returnValue((200, get_group_summary))
+        return (200, get_group_summary)
 
 
 class GroupSummaryRoomsCatServlet(RestServlet):
@@ -120,7 +120,7 @@ class GroupSummaryRoomsCatServlet(RestServlet):
             content=content,
         )
 
-        defer.returnValue((200, resp))
+        return (200, resp)
 
     @defer.inlineCallbacks
     def on_DELETE(self, request, group_id, category_id, room_id):
@@ -131,7 +131,7 @@ class GroupSummaryRoomsCatServlet(RestServlet):
             group_id, requester_user_id, room_id=room_id, category_id=category_id
         )
 
-        defer.returnValue((200, resp))
+        return (200, resp)
 
 
 class GroupCategoryServlet(RestServlet):
@@ -157,7 +157,7 @@ class GroupCategoryServlet(RestServlet):
             group_id, requester_user_id, category_id=category_id
         )
 
-        defer.returnValue((200, category))
+        return (200, category)
 
     @defer.inlineCallbacks
     def on_PUT(self, request, group_id, category_id):
@@ -169,7 +169,7 @@ class GroupCategoryServlet(RestServlet):
             group_id, requester_user_id, category_id=category_id, content=content
         )
 
-        defer.returnValue((200, resp))
+        return (200, resp)
 
     @defer.inlineCallbacks
     def on_DELETE(self, request, group_id, category_id):
@@ -180,7 +180,7 @@ class GroupCategoryServlet(RestServlet):
             group_id, requester_user_id, category_id=category_id
         )
 
-        defer.returnValue((200, resp))
+        return (200, resp)
 
 
 class GroupCategoriesServlet(RestServlet):
@@ -204,7 +204,7 @@ class GroupCategoriesServlet(RestServlet):
             group_id, requester_user_id
         )
 
-        defer.returnValue((200, category))
+        return (200, category)
 
 
 class GroupRoleServlet(RestServlet):
@@ -228,7 +228,7 @@ class GroupRoleServlet(RestServlet):
             group_id, requester_user_id, role_id=role_id
         )
 
-        defer.returnValue((200, category))
+        return (200, category)
 
     @defer.inlineCallbacks
     def on_PUT(self, request, group_id, role_id):
@@ -240,7 +240,7 @@ class GroupRoleServlet(RestServlet):
             group_id, requester_user_id, role_id=role_id, content=content
         )
 
-        defer.returnValue((200, resp))
+        return (200, resp)
 
     @defer.inlineCallbacks
     def on_DELETE(self, request, group_id, role_id):
@@ -251,7 +251,7 @@ class GroupRoleServlet(RestServlet):
             group_id, requester_user_id, role_id=role_id
         )
 
-        defer.returnValue((200, resp))
+        return (200, resp)
 
 
 class GroupRolesServlet(RestServlet):
@@ -275,7 +275,7 @@ class GroupRolesServlet(RestServlet):
             group_id, requester_user_id
         )
 
-        defer.returnValue((200, category))
+        return (200, category)
 
 
 class GroupSummaryUsersRoleServlet(RestServlet):
@@ -312,7 +312,7 @@ class GroupSummaryUsersRoleServlet(RestServlet):
             content=content,
         )
 
-        defer.returnValue((200, resp))
+        return (200, resp)
 
     @defer.inlineCallbacks
     def on_DELETE(self, request, group_id, role_id, user_id):
@@ -323,7 +323,7 @@ class GroupSummaryUsersRoleServlet(RestServlet):
             group_id, requester_user_id, user_id=user_id, role_id=role_id
         )
 
-        defer.returnValue((200, resp))
+        return (200, resp)
 
 
 class GroupRoomServlet(RestServlet):
@@ -347,7 +347,7 @@ class GroupRoomServlet(RestServlet):
             group_id, requester_user_id
         )
 
-        defer.returnValue((200, result))
+        return (200, result)
 
 
 class GroupUsersServlet(RestServlet):
@@ -371,7 +371,7 @@ class GroupUsersServlet(RestServlet):
             group_id, requester_user_id
         )
 
-        defer.returnValue((200, result))
+        return (200, result)
 
 
 class GroupInvitedUsersServlet(RestServlet):
@@ -395,7 +395,7 @@ class GroupInvitedUsersServlet(RestServlet):
             group_id, requester_user_id
         )
 
-        defer.returnValue((200, result))
+        return (200, result)
 
 
 class GroupSettingJoinPolicyServlet(RestServlet):
@@ -420,7 +420,7 @@ class GroupSettingJoinPolicyServlet(RestServlet):
             group_id, requester_user_id, content
         )
 
-        defer.returnValue((200, result))
+        return (200, result)
 
 
 class GroupCreateServlet(RestServlet):
@@ -450,7 +450,7 @@ class GroupCreateServlet(RestServlet):
             group_id, requester_user_id, content
         )
 
-        defer.returnValue((200, result))
+        return (200, result)
 
 
 class GroupAdminRoomsServlet(RestServlet):
@@ -477,7 +477,7 @@ class GroupAdminRoomsServlet(RestServlet):
             group_id, requester_user_id, room_id, content
         )
 
-        defer.returnValue((200, result))
+        return (200, result)
 
     @defer.inlineCallbacks
     def on_DELETE(self, request, group_id, room_id):
@@ -488,7 +488,7 @@ class GroupAdminRoomsServlet(RestServlet):
             group_id, requester_user_id, room_id
         )
 
-        defer.returnValue((200, result))
+        return (200, result)
 
 
 class GroupAdminRoomsConfigServlet(RestServlet):
@@ -516,7 +516,7 @@ class GroupAdminRoomsConfigServlet(RestServlet):
             group_id, requester_user_id, room_id, config_key, content
         )
 
-        defer.returnValue((200, result))
+        return (200, result)
 
 
 class GroupAdminUsersInviteServlet(RestServlet):
@@ -546,7 +546,7 @@ class GroupAdminUsersInviteServlet(RestServlet):
             group_id, user_id, requester_user_id, config
         )
 
-        defer.returnValue((200, result))
+        return (200, result)
 
 
 class GroupAdminUsersKickServlet(RestServlet):
@@ -573,7 +573,7 @@ class GroupAdminUsersKickServlet(RestServlet):
             group_id, user_id, requester_user_id, content
         )
 
-        defer.returnValue((200, result))
+        return (200, result)
 
 
 class GroupSelfLeaveServlet(RestServlet):
@@ -598,7 +598,7 @@ class GroupSelfLeaveServlet(RestServlet):
             group_id, requester_user_id, requester_user_id, content
         )
 
-        defer.returnValue((200, result))
+        return (200, result)
 
 
 class GroupSelfJoinServlet(RestServlet):
@@ -623,7 +623,7 @@ class GroupSelfJoinServlet(RestServlet):
             group_id, requester_user_id, content
         )
 
-        defer.returnValue((200, result))
+        return (200, result)
 
 
 class GroupSelfAcceptInviteServlet(RestServlet):
@@ -648,7 +648,7 @@ class GroupSelfAcceptInviteServlet(RestServlet):
             group_id, requester_user_id, content
         )
 
-        defer.returnValue((200, result))
+        return (200, result)
 
 
 class GroupSelfUpdatePublicityServlet(RestServlet):
@@ -672,7 +672,7 @@ class GroupSelfUpdatePublicityServlet(RestServlet):
         publicise = content["publicise"]
         yield self.store.update_group_publicity(group_id, requester_user_id, publicise)
 
-        defer.returnValue((200, {}))
+        return (200, {})
 
 
 class PublicisedGroupsForUserServlet(RestServlet):
@@ -694,7 +694,7 @@ class PublicisedGroupsForUserServlet(RestServlet):
 
         result = yield self.groups_handler.get_publicised_groups_for_user(user_id)
 
-        defer.returnValue((200, result))
+        return (200, result)
 
 
 class PublicisedGroupsForUsersServlet(RestServlet):
@@ -719,7 +719,7 @@ class PublicisedGroupsForUsersServlet(RestServlet):
 
         result = yield self.groups_handler.bulk_get_publicised_groups(user_ids)
 
-        defer.returnValue((200, result))
+        return (200, result)
 
 
 class GroupsForUserServlet(RestServlet):
@@ -741,7 +741,7 @@ class GroupsForUserServlet(RestServlet):
 
         result = yield self.groups_handler.get_joined_groups(requester_user_id)
 
-        defer.returnValue((200, result))
+        return (200, result)
 
 
 def register_servlets(hs, http_server):

synapse/rest/client/v2_alpha/keys.py

@@ -95,7 +95,7 @@ class KeyUploadServlet(RestServlet):
         result = yield self.e2e_keys_handler.upload_keys_for_user(
             user_id, device_id, body
         )
-        defer.returnValue((200, result))
+        return (200, result)
 
 
 class KeyQueryServlet(RestServlet):
@@ -149,7 +149,7 @@ class KeyQueryServlet(RestServlet):
         timeout = parse_integer(request, "timeout", 10 * 1000)
         body = parse_json_object_from_request(request)
         result = yield self.e2e_keys_handler.query_devices(body, timeout)
-        defer.returnValue((200, result))
+        return (200, result)
 
 
 class KeyChangesServlet(RestServlet):
@@ -189,7 +189,7 @@ class KeyChangesServlet(RestServlet):
 
         results = yield self.device_handler.get_user_ids_changed(user_id, from_token)
 
-        defer.returnValue((200, results))
+        return (200, results)
 
 
 class OneTimeKeyServlet(RestServlet):
@@ -224,7 +224,7 @@ class OneTimeKeyServlet(RestServlet):
         timeout = parse_integer(request, "timeout", 10 * 1000)
         body = parse_json_object_from_request(request)
         result = yield self.e2e_keys_handler.claim_one_time_keys(body, timeout)
-        defer.returnValue((200, result))
+        return (200, result)
 
 
 def register_servlets(hs, http_server):

synapse/rest/client/v2_alpha/notifications.py

@@ -88,9 +88,7 @@ class NotificationsServlet(RestServlet):
             returned_push_actions.append(returned_pa)
             next_token = str(pa["stream_ordering"])
 
-        defer.returnValue(
-            (200, {"notifications": returned_push_actions, "next_token": next_token})
-        )
+        return (200, {"notifications": returned_push_actions, "next_token": next_token})
 
 
 def register_servlets(hs, http_server):

synapse/rest/client/v2_alpha/openid.py

@@ -83,16 +83,14 @@ class IdTokenServlet(RestServlet):
 
         yield self.store.insert_open_id_token(token, ts_valid_until_ms, user_id)
 
-        defer.returnValue(
-            (
-                200,
-                {
-                    "access_token": token,
-                    "token_type": "Bearer",
-                    "matrix_server_name": self.server_name,
-                    "expires_in": self.EXPIRES_MS / 1000,
-                },
-            )
+        return (
+            200,
+            {
+                "access_token": token,
+                "token_type": "Bearer",
+                "matrix_server_name": self.server_name,
+                "expires_in": self.EXPIRES_MS / 1000,
+            },
         )
 
 

synapse/rest/client/v2_alpha/read_marker.py

@@ -59,7 +59,7 @@ class ReadMarkerRestServlet(RestServlet):
                 event_id=read_marker_event_id,
             )
 
-        defer.returnValue((200, {}))
+        return (200, {})
 
 
 def register_servlets(hs, http_server):