Strictly type sensor.py. (#56377)

homeassistant/components/modbus/sensor.py

@@ -1,12 +1,14 @@
 """Support for Modbus Register sensors."""
 from __future__ import annotations
 
+from datetime import datetime
 import logging
 from typing import Any
 
 from homeassistant.components.sensor import CONF_STATE_CLASS, SensorEntity
 from homeassistant.const import CONF_NAME, CONF_SENSORS, CONF_UNIT_OF_MEASUREMENT
 from homeassistant.core import HomeAssistant
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.restore_state import RestoreEntity
 from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
@@ -21,9 +23,9 @@ _LOGGER = logging.getLogger(__name__)
 async def async_setup_platform(
     hass: HomeAssistant,
     config: ConfigType,
-    async_add_entities,
+    async_add_entities: AddEntitiesCallback,
     discovery_info: DiscoveryInfoType | None = None,
-):
+) -> None:
     """Set up the Modbus sensors."""
     sensors = []
 
@@ -50,14 +52,14 @@ class ModbusRegisterSensor(BaseStructPlatform, RestoreEntity, SensorEntity):
         self._attr_native_unit_of_measurement = entry.get(CONF_UNIT_OF_MEASUREMENT)
         self._attr_state_class = entry.get(CONF_STATE_CLASS)
 
-    async def async_added_to_hass(self):
+    async def async_added_to_hass(self) -> None:
         """Handle entity which will be added."""
         await self.async_base_added_to_hass()
         state = await self.async_get_last_state()
         if state:
             self._attr_native_value = state.state
 
-    async def async_update(self, now=None):
+    async def async_update(self, now: datetime | None = None) -> None:
         """Update the state of the sensor."""
         # remark "now" is a dummy parameter to avoid problems with
         # async_track_time_interval