Upgrade mypy to version 0.931 (#12030)

Upgrade mypy to 0.931, mypy-zope to 0.3.5 and fix new complaints.

synapse/handlers/search.py

@@ -654,7 +654,7 @@ class SearchHandler:
                 self.storage, user.to_string(), res.events_after
             )
 
-            context = {
+            context: JsonDict = {
                 "events_before": events_before,
                 "events_after": events_after,
                 "start": await now_token.copy_and_replace(

synapse/push/baserules.py

@@ -130,7 +130,9 @@ def make_base_prepend_rules(
     return rules
 
 
-BASE_APPEND_CONTENT_RULES = [
+# We have to annotate these types, otherwise mypy infers them as
+# `List[Dict[str, Sequence[Collection[str]]]]`.
+BASE_APPEND_CONTENT_RULES: List[Dict[str, Any]] = [
     {
         "rule_id": "global/content/.m.rule.contains_user_name",
         "conditions": [
@@ -149,7 +151,7 @@ BASE_APPEND_CONTENT_RULES = [
 ]
 
 
-BASE_PREPEND_OVERRIDE_RULES = [
+BASE_PREPEND_OVERRIDE_RULES: List[Dict[str, Any]] = [
     {
         "rule_id": "global/override/.m.rule.master",
         "enabled": False,
@@ -159,7 +161,7 @@ BASE_PREPEND_OVERRIDE_RULES = [
 ]
 
 
-BASE_APPEND_OVERRIDE_RULES = [
+BASE_APPEND_OVERRIDE_RULES: List[Dict[str, Any]] = [
     {
         "rule_id": "global/override/.m.rule.suppress_notices",
         "conditions": [
@@ -278,7 +280,7 @@ BASE_APPEND_OVERRIDE_RULES = [
 ]
 
 
-BASE_APPEND_UNDERRIDE_RULES = [
+BASE_APPEND_UNDERRIDE_RULES: List[Dict[str, Any]] = [
     {
         "rule_id": "global/underride/.m.rule.call",
         "conditions": [

synapse/push/httppusher.py

@@ -325,7 +325,7 @@ class HttpPusher(Pusher):
         # This was checked in the __init__, but mypy doesn't seem to know that.
         assert self.data is not None
         if self.data.get("format") == "event_id_only":
-            d = {
+            d: Dict[str, Any] = {
                 "notification": {
                     "event_id": event.event_id,
                     "room_id": event.room_id,

synapse/streams/events.py

@@ -37,14 +37,16 @@ class _EventSourcesInner:
     account_data: AccountDataEventSource
 
     def get_sources(self) -> Iterator[Tuple[str, EventSource]]:
-        for attribute in _EventSourcesInner.__attrs_attrs__:  # type: ignore[attr-defined]
+        for attribute in attr.fields(_EventSourcesInner):
             yield attribute.name, getattr(self, attribute.name)
 
 
 class EventSources:
     def __init__(self, hs: "HomeServer"):
         self.sources = _EventSourcesInner(
-            *(attribute.type(hs) for attribute in _EventSourcesInner.__attrs_attrs__)  # type: ignore[attr-defined]
+            # mypy thinks attribute.type is `Optional`, but we know it's never `None` here since
+            # all the attributes of `_EventSourcesInner` are annotated.
+            *(attribute.type(hs) for attribute in attr.fields(_EventSourcesInner))  # type: ignore[misc]
         )
         self.store = hs.get_datastore()
 

synapse/util/daemonize.py

@@ -20,7 +20,7 @@ import os
 import signal
 import sys
 from types import FrameType, TracebackType
-from typing import NoReturn, Type
+from typing import NoReturn, Optional, Type
 
 
 def daemonize_process(pid_file: str, logger: logging.Logger, chdir: str = "/") -> None:
@@ -100,7 +100,9 @@ def daemonize_process(pid_file: str, logger: logging.Logger, chdir: str = "/") -
     # also catch any other uncaught exceptions before we get that far.)
 
     def excepthook(
-        type_: Type[BaseException], value: BaseException, traceback: TracebackType
+        type_: Type[BaseException],
+        value: BaseException,
+        traceback: Optional[TracebackType],
     ) -> None:
         logger.critical("Unhanded exception", exc_info=(type_, value, traceback))
 
@@ -123,7 +125,7 @@ def daemonize_process(pid_file: str, logger: logging.Logger, chdir: str = "/") -
         sys.exit(1)
 
     # write a log line on SIGTERM.
-    def sigterm(signum: signal.Signals, frame: FrameType) -> NoReturn:
+    def sigterm(signum: int, frame: Optional[FrameType]) -> NoReturn:
         logger.warning("Caught signal %s. Stopping daemon." % signum)
         sys.exit(0)
 

synapse/util/patch_inline_callbacks.py

@@ -14,7 +14,7 @@
 
 import functools
 import sys
-from typing import Any, Callable, Generator, List, TypeVar
+from typing import Any, Callable, Generator, List, TypeVar, cast
 
 from twisted.internet import defer
 from twisted.internet.defer import Deferred
@@ -174,7 +174,9 @@ def _check_yield_points(
                         )
                     )
                     changes.append(err)
-                return getattr(e, "value", None)
+                # The `StopIteration` or `_DefGen_Return` contains the return value from the
+                # generator.
+                return cast(T, e.value)
 
             frame = gen.gi_frame