Use inline type hints in `http/federation/`, `storage/` and `util/` (#10381)

2 files changed, 9 insertions, 9 deletions

diff --git a/synapse/storage/util/id_generators.py b/synapse/storage/util/id_generators.py
index f1e62f9e85..c768fdea56 100644
--- a/synapse/storage/util/id_generators.py
+++ b/synapse/storage/util/id_generators.py
@@ -112,7 +112,7 @@ class StreamIdGenerator:
         # insertion ordering will ensure its in the correct ordering.
         #
         # The key and values are the same, but we never look at the values.
-        self._unfinished_ids = OrderedDict()  # type: OrderedDict[int, int]
+        self._unfinished_ids: OrderedDict[int, int] = OrderedDict()
 
     def get_next(self):
         """
@@ -236,15 +236,15 @@ class MultiWriterIdGenerator:
         # Note: If we are a negative stream then we still store all the IDs as
         # positive to make life easier for us, and simply negate the IDs when we
         # return them.
-        self._current_positions = {}  # type: Dict[str, int]
+        self._current_positions: Dict[str, int] = {}
 
         # Set of local IDs that we're still processing. The current position
         # should be less than the minimum of this set (if not empty).
-        self._unfinished_ids = set()  # type: Set[int]
+        self._unfinished_ids: Set[int] = set()
 
         # Set of local IDs that we've processed that are larger than the current
         # position, due to there being smaller unpersisted IDs.
-        self._finished_ids = set()  # type: Set[int]
+        self._finished_ids: Set[int] = set()
 
         # We track the max position where we know everything before has been
         # persisted. This is done by a) looking at the min across all instances
@@ -265,7 +265,7 @@ class MultiWriterIdGenerator:
         self._persisted_upto_position = (
             min(self._current_positions.values()) if self._current_positions else 1
         )
-        self._known_persisted_positions = []  # type: List[int]
+        self._known_persisted_positions: List[int] = []
 
         self._sequence_gen = PostgresSequenceGenerator(sequence_name)
 
@@ -465,7 +465,7 @@ class MultiWriterIdGenerator:
             self._unfinished_ids.discard(next_id)
             self._finished_ids.add(next_id)
 
-            new_cur = None  # type: Optional[int]
+            new_cur: Optional[int] = None
 
             if self._unfinished_ids:
                 # If there are unfinished IDs then the new position will be the
diff --git a/synapse/storage/util/sequence.py b/synapse/storage/util/sequence.py
index 30b6b8e0ca..bb33e04fb1 100644
--- a/synapse/storage/util/sequence.py
+++ b/synapse/storage/util/sequence.py
@@ -208,10 +208,10 @@ class LocalSequenceGenerator(SequenceGenerator):
                  get_next_id_txn; should return the curreent maximum id
         """
         # the callback. this is cleared after it is called, so that it can be GCed.
-        self._callback = get_first_callback  # type: Optional[GetFirstCallbackType]
+        self._callback: Optional[GetFirstCallbackType] = get_first_callback
 
         # The current max value, or None if we haven't looked in the DB yet.
-        self._current_max_id = None  # type: Optional[int]
+        self._current_max_id: Optional[int] = None
         self._lock = threading.Lock()
 
     def get_next_id_txn(self, txn: Cursor) -> int:
@@ -274,7 +274,7 @@ def build_sequence_generator(
             `check_consistency` details.
     """
     if isinstance(database_engine, PostgresEngine):
-        seq = PostgresSequenceGenerator(sequence_name)  # type: SequenceGenerator
+        seq: SequenceGenerator = PostgresSequenceGenerator(sequence_name)
     else:
         seq = LocalSequenceGenerator(get_first_callback)