Fixup synapse.api to pass mypy (#6733)

changelog.d/6733.misc

+Fixup synapse.api to pass mypy.

mypy.ini

@@ -7,6 +7,9 @@ show_error_codes = True
 show_traceback = True
 mypy_path = stubs
 
+[mypy-pymacaroons.*]
+ignore_missing_imports = True
+
 [mypy-zope]
 ignore_missing_imports = True
 

synapse/api/filtering.py

@@ -15,6 +15,8 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+from typing import List
+
 from six import text_type
 
 import jsonschema
@@ -293,7 +295,7 @@ class Filter(object):
             room_id = None
             ev_type = "m.presence"
             contains_url = False
-            labels = []
+            labels = []  # type: List[str]
         else:
             sender = event.get("sender", None)
             if not sender:

synapse/api/ratelimiting.py

@@ -12,7 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import collections
+from collections import OrderedDict
+from typing import Any, Optional, Tuple
 
 from synapse.api.errors import LimitExceededError
 
@@ -23,7 +24,9 @@ class Ratelimiter(object):
     """
 
     def __init__(self):
-        self.message_counts = collections.OrderedDict()
+        self.message_counts = (
+            OrderedDict()
+        )  # type: OrderedDict[Any, Tuple[float, int, Optional[float]]]
 
     def can_do_action(self, key, time_now_s, rate_hz, burst_count, update=True):
         """Can the entity (e.g. user or IP address) perform the action?

synapse/event_auth.py

@@ -634,7 +634,7 @@ def get_public_keys(invite_event):
     return public_keys
 
 
-def auth_types_for_event(event) -> Set[Tuple[str]]:
+def auth_types_for_event(event) -> Set[Tuple[str, str]]:
     """Given an event, return a list of (EventType, StateKey) that may be
     needed to auth the event. The returned list may be a superset of what
     would actually be required depending on the full state of the room.

tox.ini

@@ -177,6 +177,7 @@ env =
     MYPYPATH = stubs/
 extras = all
 commands = mypy \
+            synapse/api \
             synapse/config/ \
             synapse/handlers/ui_auth \
             synapse/logging/ \