Improve async_track_device_registry_updated_event callback typing (#97125)

homeassistant/components/mqtt/mixins.py

@@ -34,7 +34,10 @@ from homeassistant.helpers import (
     device_registry as dr,
     entity_registry as er,
 )
-from homeassistant.helpers.device_registry import DeviceEntry
+from homeassistant.helpers.device_registry import (
+    DeviceEntry,
+    EventDeviceRegistryUpdatedData,
+)
 from homeassistant.helpers.dispatcher import (
     async_dispatcher_connect,
     async_dispatcher_send,
@@ -720,7 +723,9 @@ class MqttDiscoveryDeviceUpdate(ABC):
             )
             return
 
-    async def _async_device_removed(self, event: Event) -> None:
+    async def _async_device_removed(
+        self, event: EventType[EventDeviceRegistryUpdatedData]
+    ) -> None:
         """Handle the manual removal of a device."""
         if self._skip_device_removal or not async_removed_from_device(
             self.hass, event, cast(str, self._device_id), self._config_entry_id
@@ -1178,14 +1183,16 @@ def update_device(
 
 @callback
 def async_removed_from_device(
-    hass: HomeAssistant, event: Event, mqtt_device_id: str, config_entry_id: str
+    hass: HomeAssistant,
+    event: EventType[EventDeviceRegistryUpdatedData],
+    mqtt_device_id: str,
+    config_entry_id: str,
 ) -> bool:
     """Check if the passed event indicates MQTT was removed from a device."""
-    action: str = event.data["action"]
+    if event.data["action"] not in ("remove", "update"):
-    if action not in ("remove", "update"):
         return False
 
-    if action == "update":
+    if event.data["action"] == "update":
         if "config_entries" not in event.data["changes"]:
             return False
         device_registry = dr.async_get(hass)

homeassistant/helpers/device_registry.py

@@ -10,7 +10,6 @@ from typing import TYPE_CHECKING, Any, Literal, TypedDict, TypeVar, cast
 from urllib.parse import urlparse
 
 import attr
-from typing_extensions import NotRequired
 
 from homeassistant.const import EVENT_HOMEASSISTANT_STARTED, EVENT_HOMEASSISTANT_STOP
 from homeassistant.core import Event, HomeAssistant, callback
@@ -97,12 +96,25 @@ DEVICE_INFO_TYPES = {
 DEVICE_INFO_KEYS = set.union(*(itm for itm in DEVICE_INFO_TYPES.values()))
 
 
-class EventDeviceRegistryUpdatedData(TypedDict):
+class _EventDeviceRegistryUpdatedData_CreateRemove(TypedDict):
-    """EventDeviceRegistryUpdated data."""
+    """EventDeviceRegistryUpdated data for action type 'create' and 'remove'."""
 
-    action: Literal["create", "remove", "update"]
+    action: Literal["create", "remove"]
     device_id: str
-    changes: NotRequired[dict[str, Any]]
+
+
+class _EventDeviceRegistryUpdatedData_Update(TypedDict):
+    """EventDeviceRegistryUpdated data for action type 'update'."""
+
+    action: Literal["update"]
+    device_id: str
+    changes: dict[str, Any]
+
+
+EventDeviceRegistryUpdatedData = (
+    _EventDeviceRegistryUpdatedData_CreateRemove
+    | _EventDeviceRegistryUpdatedData_Update
+)
 
 
 class DeviceEntryType(StrEnum):

homeassistant/helpers/entity.py

@@ -40,7 +40,7 @@ from homeassistant.loader import bind_hass
 from homeassistant.util import dt as dt_util, ensure_unique_string, slugify
 
 from . import device_registry as dr, entity_registry as er
-from .device_registry import DeviceEntryType
+from .device_registry import DeviceEntryType, EventDeviceRegistryUpdatedData
 from .event import (
     async_track_device_registry_updated_event,
     async_track_entity_registry_updated_event,
@@ -1146,7 +1146,9 @@ class Entity(ABC):
         self._unsub_device_updates = None
 
     @callback
-    def _async_device_registry_updated(self, event: Event) -> None:
+    def _async_device_registry_updated(
+        self, event: EventType[EventDeviceRegistryUpdatedData]
+    ) -> None:
         """Handle device registry update."""
         data = event.data