Remove unnecessary parentheses around return statements (#5931)

Python will return a tuple whether there are parentheses around the returned values or not.

I'm just sick of my editor complaining about this all over the place :)

changelog.d/5931.misc

@@ -0,0 +1 @@
+Remove unnecessary parentheses in return statements.

synapse/api/auth.py

@@ -276,25 +276,25 @@ def _get_appservice_user_id(self, request):
             self.get_access_token_from_request(request)
         )
         if app_service is None:
-            return (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:
-                return (None, None)
+                return None, None
 
         if b"user_id" not in request.args:
-            return (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:
-            return (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")
-        return (user_id, app_service)
+        return user_id, app_service
 
     @defer.inlineCallbacks
     def get_user_by_access_token(self, token, rights="access"):
@@ -694,7 +694,7 @@ def check_in_room_or_world_readable(self, room_id, user_id):
             #  * 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)
-            return (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, ""
@@ -703,7 +703,7 @@ def check_in_room_or_world_readable(self, room_id, user_id):
                 visibility
                 and visibility.content["history_visibility"] == "world_readable"
             ):
-                return (Membership.JOIN, None)
+                return Membership.JOIN, None
                 return
             raise AuthError(
                 403, "Guest access not allowed", errcode=Codes.GUEST_ACCESS_FORBIDDEN

synapse/app/frontend_proxy.py

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

synapse/crypto/event_signing.py

@@ -83,7 +83,7 @@ def compute_content_hash(event_dict, hash_algorithm):
     event_json_bytes = encode_canonical_json(event_dict)
 
     hashed = hash_algorithm(event_json_bytes)
-    return (hashed.name, hashed.digest())
+    return hashed.name, hashed.digest()
 
 
 def compute_event_reference_hash(event, hash_algorithm=hashlib.sha256):
@@ -106,7 +106,7 @@ def compute_event_reference_hash(event, hash_algorithm=hashlib.sha256):
     event_dict.pop("unsigned", None)
     event_json_bytes = encode_canonical_json(event_dict)
     hashed = hash_algorithm(event_json_bytes)
-    return (hashed.name, hashed.digest())
+    return hashed.name, hashed.digest()
 
 
 def compute_event_signature(event_dict, signature_name, signing_key):

synapse/federation/federation_client.py

@@ -355,7 +355,7 @@ def get_state_for_room(self, destination, room_id, event_id):
 
             auth_chain.sort(key=lambda e: e.depth)
 
-            return (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 @@ def get_state_for_room(self, destination, room_id, event_id):
 
         signed_auth.sort(key=lambda e: e.depth)
 
-        return (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 @@ def get_events_from_store_or_dest(self, destination, room_id, event_ids):
             missing_events.discard(k)
 
         if not missing_events:
-            return (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 @@ def get_events_from_store_or_dest(self, destination, room_id, event_ids):
             # We removed all events we successfully fetched from `batch`
             failed_to_fetch.update(batch)
 
-        return (signed_events, failed_to_fetch)
+        return signed_events, failed_to_fetch
 
     @defer.inlineCallbacks
     @log_function

synapse/federation/federation_server.py

@@ -100,7 +100,7 @@ def on_backfill_request(self, origin, room_id, versions, limit):
 
             res = self._transaction_from_pdus(pdus).get_dict()
 
-        return (200, res)
+        return 200, res
 
     @defer.inlineCallbacks
     @log_function
@@ -163,7 +163,7 @@ def _handle_incoming_transaction(self, origin, transaction, request_time):
             yield self.transaction_actions.set_response(
                 origin, transaction, 400, response
             )
-            return (400, response)
+            return 400, response
 
         received_pdus_counter.inc(len(transaction.pdus))
 
@@ -265,7 +265,7 @@ def process_pdus_for_room(room_id):
         logger.debug("Returning: %s", str(response))
 
         yield self.transaction_actions.set_response(origin, transaction, 200, response)
-        return (200, response)
+        return 200, response
 
     @defer.inlineCallbacks
     def received_edu(self, origin, edu_type, content):
@@ -298,7 +298,7 @@ def on_context_state_request(self, origin, room_id, event_id):
                 event_id,
             )
 
-        return (200, resp)
+        return 200, resp
 
     @defer.inlineCallbacks
     def on_state_ids_request(self, origin, room_id, event_id):
@@ -315,7 +315,7 @@ def on_state_ids_request(self, origin, room_id, event_id):
         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)
 
-        return (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):
@@ -345,15 +345,15 @@ def on_pdu_request(self, origin, event_id):
         pdu = yield self.handler.get_persisted_pdu(origin, event_id)
 
         if pdu:
-            return (200, self._transaction_from_pdus([pdu]).get_dict())
+            return 200, self._transaction_from_pdus([pdu]).get_dict()
         else:
-            return (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)
-        return (200, resp)
+        return 200, resp
 
     @defer.inlineCallbacks
     def on_make_join_request(self, origin, room_id, user_id, supported_versions):
@@ -435,7 +435,7 @@ def on_send_leave_request(self, origin, content, room_id):
 
         logger.debug("on_send_leave_request: pdu sigs: %s", pdu.signatures)
         yield self.handler.on_send_leave_request(origin, pdu)
-        return (200, {})
+        return 200, {}
 
     @defer.inlineCallbacks
     def on_event_auth(self, origin, room_id, event_id):
@@ -446,7 +446,7 @@ def on_event_auth(self, origin, room_id, event_id):
             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]}
-        return (200, res)
+        return 200, res
 
     @defer.inlineCallbacks
     def on_query_auth_request(self, origin, content, room_id, event_id):
@@ -499,7 +499,7 @@ def on_query_auth_request(self, origin, content, room_id, event_id):
                 "missing": ret.get("missing", []),
             }
 
-        return (200, send_content)
+        return 200, send_content
 
     @log_function
     def on_query_client_keys(self, origin, content):

synapse/handlers/account_data.py

@@ -51,8 +51,8 @@ def get_new_events(self, user, from_key, **kwargs):
                     {"type": account_data_type, "content": content, "room_id": room_id}
                 )
 
-        return (results, current_stream_id)
+        return results, current_stream_id
 
     @defer.inlineCallbacks
     def get_pagination_rows(self, user, config, key):
-        return ([], config.to_id)
+        return [], config.to_id

synapse/handlers/auth.py

@@ -280,7 +280,7 @@ def check_auth(self, flows, clientdict, clientip, password_servlet=False):
                     creds,
                     list(clientdict),
                 )
-                return (creds, clientdict, session["id"])
+                return creds, clientdict, session["id"]
 
         ret = self._auth_dict_for_flows(flows, session)
         ret["completed"] = list(creds)
@@ -722,7 +722,7 @@ def validate_login(self, username, login_submission):
                 known_login_type = True
                 is_valid = yield provider.check_password(qualified_user_id, password)
                 if is_valid:
-                    return (qualified_user_id, None)
+                    return qualified_user_id, None
 
             if not hasattr(provider, "get_supported_login_types") or not hasattr(
                 provider, "check_auth"
@@ -766,7 +766,7 @@ def validate_login(self, username, login_submission):
             )
 
             if canonical_user_id:
-                return (canonical_user_id, None)
+                return canonical_user_id, None
 
         if not known_login_type:
             raise SynapseError(400, "Unknown login type %s" % login_type)
@@ -816,7 +816,7 @@ def check_password_provider_3pid(self, medium, address, password):
                         result = (result, None)
                     return result
 
-        return (None, None)
+        return None, None
 
     @defer.inlineCallbacks
     def _check_local_password(self, user_id, password):

synapse/handlers/federation.py

@@ -1428,7 +1428,7 @@ def _make_and_verify_event(
         assert event.user_id == user_id
         assert event.state_key == user_id
         assert event.room_id == room_id
-        return (origin, event, format_ver)
+        return origin, event, format_ver
 
     @defer.inlineCallbacks
     @log_function

synapse/handlers/initial_sync.py

@@ -449,7 +449,7 @@ def _check_in_room_or_world_readable(self, room_id, user_id):
             #  * 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)
-            return (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(
@@ -459,7 +459,7 @@ def _check_in_room_or_world_readable(self, room_id, user_id):
                 visibility
                 and visibility.content["history_visibility"] == "world_readable"
             ):
-                return (Membership.JOIN, None)
+                return Membership.JOIN, None
                 return
             raise AuthError(
                 403, "Guest access not allowed", errcode=Codes.GUEST_ACCESS_FORBIDDEN

synapse/handlers/presence.py

@@ -1032,7 +1032,7 @@ def get_new_events(
                 #
                 # Hence this guard where we just return nothing so that the sync
                 # doesn't return. C.f. #5503.
-                return ([], max_token)
+                return [], max_token
 
             presence = self.get_presence_handler()
             stream_change_cache = self.store.presence_stream_cache
@@ -1279,7 +1279,7 @@ def get_interested_parties(store, states):
         # Always notify self
         users_to_states.setdefault(state.user_id, []).append(state)
 
-    return (room_ids_to_states, users_to_states)
+    return room_ids_to_states, users_to_states
 
 
 @defer.inlineCallbacks

synapse/handlers/receipts.py

@@ -148,7 +148,7 @@ def get_new_events(self, from_key, room_ids, **kwargs):
         to_key = yield self.get_current_key()
 
         if from_key == to_key:
-            return ([], to_key)
+            return [], to_key
 
         events = yield self.store.get_linearized_receipts_for_rooms(
             room_ids, from_key=from_key, to_key=to_key

synapse/handlers/register.py

@@ -622,7 +622,7 @@ def register_device(self, user_id, device_id, initial_display_name, is_guest=Fal
                 initial_display_name=initial_display_name,
                 is_guest=is_guest,
             )
-            return (r["device_id"], r["access_token"])
+            return r["device_id"], r["access_token"]
 
         valid_until_ms = None
         if self.session_lifetime is not None:

synapse/handlers/room_member.py

@@ -903,7 +903,7 @@ def _ask_id_server_for_third_party_invite(
         if not public_keys:
             public_keys.append(fallback_public_key)
         display_name = data["display_name"]
-        return (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):

synapse/handlers/sync.py

@@ -378,7 +378,7 @@ def ephemeral_by_room(self, sync_result_builder, now_token, since_token=None):
                 event_copy = {k: v for (k, v) in iteritems(event) if k != "room_id"}
                 ephemeral_by_room.setdefault(room_id, []).append(event_copy)
 
-        return (now_token, ephemeral_by_room)
+        return now_token, ephemeral_by_room
 
     @defer.inlineCallbacks
     def _load_filtered_recents(
@@ -1332,7 +1332,7 @@ def _generate_sync_entry_for_rooms(self, sync_result_builder, account_data_by_ro
                     )
                     if not tags_by_room:
                         logger.debug("no-oping sync")
-                        return ([], [], [], [])
+                        return [], [], [], []
 
         ignored_account_data = yield self.store.get_global_account_data_by_type_for_user(
             "m.ignored_user_list", user_id=user_id
@@ -1642,7 +1642,7 @@ def _get_rooms_changed(self, sync_result_builder, ignored_users):
                 )
             room_entries.append(entry)
 
-        return (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):
@@ -1716,7 +1716,7 @@ def _get_all_rooms(self, sync_result_builder, ignored_users):
                     )
                 )
 
-        return (room_entries, invited, [])
+        return room_entries, invited, []
 
     @defer.inlineCallbacks
     def _generate_room_entry(

synapse/handlers/typing.py

@@ -319,4 +319,4 @@ def get_current_key(self):
         return self.get_typing_handler()._latest_room_serial
 
     def get_pagination_rows(self, user, pagination_config, key):
-        return ([], pagination_config.from_key)
+        return [], pagination_config.from_key

synapse/http/federation/well_known_resolver.py

@@ -207,7 +207,7 @@ def _fetch_well_known(self, server_name):
             cache_period + WELL_KNOWN_REMEMBER_DOMAIN_HAD_VALID,
         )
 
-        return (result, cache_period)
+        return result, cache_period
 
     @defer.inlineCallbacks
     def _make_well_known_request(self, server_name, retry):