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-rw-r--r--synapse/rest/admin/_base.py4
-rw-r--r--synapse/rest/client/v1/push_rule.py6
-rw-r--r--synapse/rest/client/v1/pusher.py4
-rw-r--r--synapse/rest/client/v2_alpha/sync.py2
-rw-r--r--synapse/rest/key/v2/remote_key_resource.py2
-rw-r--r--synapse/rest/media/v1/_base.py40
6 files changed, 28 insertions, 30 deletions
diff --git a/synapse/rest/admin/_base.py b/synapse/rest/admin/_base.py
index 459482eb6d..a96f75ce26 100644
--- a/synapse/rest/admin/_base.py
+++ b/synapse/rest/admin/_base.py
@@ -29,7 +29,7 @@ def historical_admin_path_patterns(path_regex):
     Note that this should only be used for existing endpoints: new ones should just
     register for the /_synapse/admin path.
     """
-    return list(
+    return [
         re.compile(prefix + path_regex)
         for prefix in (
             "^/_synapse/admin/v1",
@@ -37,7 +37,7 @@ def historical_admin_path_patterns(path_regex):
             "^/_matrix/client/unstable/admin",
             "^/_matrix/client/r0/admin",
         )
-    )
+    ]
 
 
 def admin_patterns(path_regex: str):
diff --git a/synapse/rest/client/v1/push_rule.py b/synapse/rest/client/v1/push_rule.py
index 4f74600239..9fd4908136 100644
--- a/synapse/rest/client/v1/push_rule.py
+++ b/synapse/rest/client/v1/push_rule.py
@@ -49,7 +49,7 @@ class PushRuleRestServlet(RestServlet):
         if self._is_worker:
             raise Exception("Cannot handle PUT /push_rules on worker")
 
-        spec = _rule_spec_from_path([x for x in path.split("/")])
+        spec = _rule_spec_from_path(path.split("/"))
         try:
             priority_class = _priority_class_from_spec(spec)
         except InvalidRuleException as e:
@@ -110,7 +110,7 @@ class PushRuleRestServlet(RestServlet):
         if self._is_worker:
             raise Exception("Cannot handle DELETE /push_rules on worker")
 
-        spec = _rule_spec_from_path([x for x in path.split("/")])
+        spec = _rule_spec_from_path(path.split("/"))
 
         requester = await self.auth.get_user_by_req(request)
         user_id = requester.user.to_string()
@@ -138,7 +138,7 @@ class PushRuleRestServlet(RestServlet):
 
         rules = format_push_rules_for_user(requester.user, rules)
 
-        path = [x for x in path.split("/")][1:]
+        path = path.split("/")[1:]
 
         if path == []:
             # we're a reference impl: pedantry is our job.
diff --git a/synapse/rest/client/v1/pusher.py b/synapse/rest/client/v1/pusher.py
index 6f6b7aed6e..550a2f1b44 100644
--- a/synapse/rest/client/v1/pusher.py
+++ b/synapse/rest/client/v1/pusher.py
@@ -54,9 +54,9 @@ class PushersRestServlet(RestServlet):
 
         pushers = await self.hs.get_datastore().get_pushers_by_user_id(user.to_string())
 
-        filtered_pushers = list(
+        filtered_pushers = [
             {k: v for k, v in p.items() if k in ALLOWED_KEYS} for p in pushers
-        )
+        ]
 
         return 200, {"pushers": filtered_pushers}
 
diff --git a/synapse/rest/client/v2_alpha/sync.py b/synapse/rest/client/v2_alpha/sync.py
index d8292ce29f..8fa68dd37f 100644
--- a/synapse/rest/client/v2_alpha/sync.py
+++ b/synapse/rest/client/v2_alpha/sync.py
@@ -72,7 +72,7 @@ class SyncRestServlet(RestServlet):
     """
 
     PATTERNS = client_patterns("/sync$")
-    ALLOWED_PRESENCE = set(["online", "offline", "unavailable"])
+    ALLOWED_PRESENCE = {"online", "offline", "unavailable"}
 
     def __init__(self, hs):
         super(SyncRestServlet, self).__init__()
diff --git a/synapse/rest/key/v2/remote_key_resource.py b/synapse/rest/key/v2/remote_key_resource.py
index 9d6813a047..4b6d030a57 100644
--- a/synapse/rest/key/v2/remote_key_resource.py
+++ b/synapse/rest/key/v2/remote_key_resource.py
@@ -149,7 +149,7 @@ class RemoteKey(DirectServeResource):
 
         time_now_ms = self.clock.time_msec()
 
-        cache_misses = dict()  # type: Dict[str, Set[str]]
+        cache_misses = {}  # type: Dict[str, Set[str]]
         for (server_name, key_id, from_server), results in cached.items():
             results = [(result["ts_added_ms"], result) for result in results]
 
diff --git a/synapse/rest/media/v1/_base.py b/synapse/rest/media/v1/_base.py
index 65bbf00073..ba28dd089d 100644
--- a/synapse/rest/media/v1/_base.py
+++ b/synapse/rest/media/v1/_base.py
@@ -135,27 +135,25 @@ def add_file_headers(request, media_type, file_size, upload_name):
 
 # separators as defined in RFC2616. SP and HT are handled separately.
 # see _can_encode_filename_as_token.
-_FILENAME_SEPARATOR_CHARS = set(
-    (
-        "(",
-        ")",
-        "<",
-        ">",
-        "@",
-        ",",
-        ";",
-        ":",
-        "\\",
-        '"',
-        "/",
-        "[",
-        "]",
-        "?",
-        "=",
-        "{",
-        "}",
-    )
-)
+_FILENAME_SEPARATOR_CHARS = {
+    "(",
+    ")",
+    "<",
+    ">",
+    "@",
+    ",",
+    ";",
+    ":",
+    "\\",
+    '"',
+    "/",
+    "[",
+    "]",
+    "?",
+    "=",
+    "{",
+    "}",
+}
 
 
 def _can_encode_filename_as_token(x):