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-rw-r--r--synapse/storage/appservice.py18
-rw-r--r--synapse/storage/registration.py2
-rw-r--r--synapse/storage/stream.py8
3 files changed, 12 insertions, 16 deletions
diff --git a/synapse/storage/appservice.py b/synapse/storage/appservice.py
index d0632d55d1..c6ca2ab04e 100644
--- a/synapse/storage/appservice.py
+++ b/synapse/storage/appservice.py
@@ -219,20 +219,17 @@ class ApplicationServiceStore(SQLBaseStore):
 
         # get all rooms matching the room ID regex.
         room_entries = yield self.get_all_rooms()  # RoomEntry list
-        matching_room_id_list = [
+        matching_room_list = set([
             r.room_id for r in room_entries if
             service.is_interested_in_room(r.room_id)
-        ]
+        ])
 
         # resolve room IDs for matching room alias regex.
         room_alias_mappings = yield self.get_all_associations()
-        matching_alias_list = [
+        matching_room_list |= set([
             r.room_id for r in room_alias_mappings if
             service.is_interested_in_alias(r.room_alias)
-        ]
-        room_ids_matching_alias_or_id = set(
-            matching_room_id_list + matching_alias_list
-        )
+        ])
 
         # get all rooms for every user for this AS. This is scoped to users on
         # this HS only.
@@ -241,11 +238,10 @@ class ApplicationServiceStore(SQLBaseStore):
             u["name"] for u in user_list if
             service.is_interested_in_user(u["name"])
         ]
-        rooms_for_user_matching_user_id = []  # RoomsForUser list
+        rooms_for_user_matching_user_id = set()  # RoomsForUser list
         for user_id in user_list:
             rooms_for_user = yield self.get_rooms_for_user(user_id)
-            rooms_for_user_matching_user_id += rooms_for_user
-        rooms_for_user_matching_user_id = set(rooms_for_user_matching_user_id)
+            rooms_for_user_matching_user_id |= set(rooms_for_user)
 
         # make RoomsForUser tuples for room ids and aliases which are not in the
         # main rooms_for_user_list - e.g. they are rooms which do not have AS
@@ -253,7 +249,7 @@ class ApplicationServiceStore(SQLBaseStore):
         known_room_ids = [r.room_id for r in rooms_for_user_matching_user_id]
         missing_rooms_for_user = [
             RoomsForUser(r, service.sender, "join") for r in
-            room_ids_matching_alias_or_id if r not in known_room_ids
+            matching_room_list if r not in known_room_ids
         ]
         rooms_for_user_matching_user_id |= set(missing_rooms_for_user)
 
diff --git a/synapse/storage/registration.py b/synapse/storage/registration.py
index 7aff3dbd33..9c92575c7f 100644
--- a/synapse/storage/registration.py
+++ b/synapse/storage/registration.py
@@ -93,7 +93,7 @@ class RegistrationStore(SQLBaseStore):
         )
 
     def get_all_users(self):
-        query = ("SELECT users.name FROM users")
+        query = "SELECT users.name FROM users"
         return self._execute(
             self.cursor_to_dict,
             query
diff --git a/synapse/storage/stream.py b/synapse/storage/stream.py
index 09417bd147..bad427288d 100644
--- a/synapse/storage/stream.py
+++ b/synapse/storage/stream.py
@@ -43,7 +43,7 @@ from synapse.util.logutils import log_function
 from collections import namedtuple
 
 import logging
-import simplejson
+import simplejson as json
 
 
 logger = logging.getLogger(__name__)
@@ -178,7 +178,7 @@ class StreamStore(SQLBaseStore):
                 # interested in was invited to a room. We'll be passing this
                 # through _get_events_txn later, so ignore the fact that this
                 # may be a redacted event.
-                event_content = simplejson.loads(row["unrecognized_keys"])
+                event_content = json.loads(row["unrecognized_keys"])
                 if (service.is_interested_in_user(
                         event_content.get("state_key"))):
                     return True
@@ -202,7 +202,7 @@ class StreamStore(SQLBaseStore):
             self._set_before_and_after(ret, rows)
 
             if rows:
-                key = "s%d" % max([r["stream_ordering"] for r in rows])
+                key = "s%d" % max(r["stream_ordering"] for r in rows)
 
             else:
                 # Assume we didn't get anything because there was nothing to
@@ -271,7 +271,7 @@ class StreamStore(SQLBaseStore):
             self._set_before_and_after(ret, rows)
 
             if rows:
-                key = "s%d" % max([r["stream_ordering"] for r in rows])
+                key = "s%d" % max(r["stream_ordering"] for r in rows)
 
             else:
                 # Assume we didn't get anything because there was nothing to