Improve type hints in environment_canada sensors (#136813)

* Use TypeVar

* Use bound for TypeVar

* Remove PEP 695 syntax

* Add type alias to use new TypeVar syntax

---------

Co-authored-by: Marc Mueller <30130371+cdce8p@users.noreply.github.com>

homeassistant/components/environment_canada/coordinator.py

@@ -19,6 +19,7 @@ from .const import DOMAIN
 _LOGGER = logging.getLogger(__name__)
 
 type ECConfigEntry = ConfigEntry[ECRuntimeData]
+type ECDataType = ECAirQuality | ECRadar | ECWeather
 
 
 @dataclass
@@ -30,16 +31,16 @@ class ECRuntimeData:
     weather_coordinator: ECDataUpdateCoordinator[ECWeather]
 
 
-class ECDataUpdateCoordinator[_ECDataTypeT: ECAirQuality | ECRadar | ECWeather](
-    DataUpdateCoordinator[_ECDataTypeT]
-):
+class ECDataUpdateCoordinator[DataT: ECDataType](DataUpdateCoordinator[DataT]):
     """Class to manage fetching EC data."""
 
+    config_entry: ECConfigEntry
+
     def __init__(
         self,
         hass: HomeAssistant,
         entry: ECConfigEntry,
-        ec_data: _ECDataTypeT,
+        ec_data: DataT,
         name: str,
         update_interval: timedelta,
     ) -> None:
@@ -60,7 +61,7 @@ class ECDataUpdateCoordinator[_ECDataTypeT: ECAirQuality | ECRadar | ECWeather](
             configuration_url="https://weather.gc.ca/",
         )
 
-    async def _async_update_data(self) -> _ECDataTypeT:
+    async def _async_update_data(self) -> DataT:
         """Fetch data from EC."""
         try:
             await self.ec_data.update()

homeassistant/components/environment_canada/sensor.py

@@ -6,6 +6,8 @@ from collections.abc import Callable
 from dataclasses import dataclass
 from typing import Any
 
+from env_canada import ECWeather
+
 from homeassistant.components.sensor import (
     SensorDeviceClass,
     SensorEntity,
@@ -27,7 +29,7 @@ from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.update_coordinator import CoordinatorEntity
 
 from .const import ATTR_STATION
-from .coordinator import ECConfigEntry
+from .coordinator import ECConfigEntry, ECDataType, ECDataUpdateCoordinator
 
 ATTR_TIME = "alert time"
 
@@ -268,13 +270,19 @@ async def async_setup_entry(
     async_add_entities(sensors)
 
 
-class ECBaseSensorEntity(CoordinatorEntity, SensorEntity):
+class ECBaseSensorEntity[DataT: ECDataType](
+    CoordinatorEntity[ECDataUpdateCoordinator[DataT]], SensorEntity
+):
     """Environment Canada sensor base."""
 
     entity_description: ECSensorEntityDescription
     _attr_has_entity_name = True
 
-    def __init__(self, coordinator, description):
+    def __init__(
+        self,
+        coordinator: ECDataUpdateCoordinator[DataT],
+        description: ECSensorEntityDescription,
+    ) -> None:
         """Initialize the base sensor."""
         super().__init__(coordinator)
         self.entity_description = description
@@ -292,10 +300,14 @@ class ECBaseSensorEntity(CoordinatorEntity, SensorEntity):
         return value
 
 
-class ECSensorEntity(ECBaseSensorEntity):
+class ECSensorEntity[DataT: ECDataType](ECBaseSensorEntity[DataT]):
     """Environment Canada sensor for conditions."""
 
-    def __init__(self, coordinator, description):
+    def __init__(
+        self,
+        coordinator: ECDataUpdateCoordinator[DataT],
+        description: ECSensorEntityDescription,
+    ) -> None:
         """Initialize the sensor."""
         super().__init__(coordinator, description)
         self._attr_extra_state_attributes = {
@@ -304,7 +316,7 @@ class ECSensorEntity(ECBaseSensorEntity):
         }
 
 
-class ECAlertSensorEntity(ECBaseSensorEntity):
+class ECAlertSensorEntity(ECBaseSensorEntity[ECWeather]):
     """Environment Canada sensor for alerts."""
 
     @property