Static typing for Uptime (#51638)

* uptime typing

* Clean up name type

Co-authored-by: Martin Hjelmare <marhje52@gmail.com>

homeassistant/components/uptime/sensor.py

@@ -1,14 +1,18 @@
 """Platform to retrieve uptime for Home Assistant."""
+from __future__ import annotations
 
 import voluptuous as vol
 
-from homeassistant.components.sensor import (
+from homeassistant.components.sensor import PLATFORM_SCHEMA, SensorEntity
+from homeassistant.const import (
+    CONF_NAME,
+    CONF_UNIT_OF_MEASUREMENT,
     DEVICE_CLASS_TIMESTAMP,
-    PLATFORM_SCHEMA,
-    SensorEntity,
 )
-from homeassistant.const import CONF_NAME, CONF_UNIT_OF_MEASUREMENT
+from homeassistant.core import HomeAssistant
 import homeassistant.helpers.config_validation as cv
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 import homeassistant.util.dt as dt_util
 
 DEFAULT_NAME = "Uptime"
@@ -26,9 +30,14 @@ PLATFORM_SCHEMA = vol.All(
 )
 
 
-async def async_setup_platform(hass, config, async_add_entities, discovery_info=None):
+async def async_setup_platform(
+    hass: HomeAssistant,
+    config: ConfigType,
+    async_add_entities: AddEntitiesCallback,
+    discovery_info: DiscoveryInfoType | None = None,
+) -> None:
     """Set up the uptime sensor platform."""
-    name = config.get(CONF_NAME)
+    name = config[CONF_NAME]
 
     async_add_entities([UptimeSensor(name)], True)
 
@@ -36,23 +45,23 @@ async def async_setup_platform(hass, config, async_add_entities, discovery_info=
 class UptimeSensor(SensorEntity):
     """Representation of an uptime sensor."""
 
-    def __init__(self, name):
+    def __init__(self, name: str) -> None:
         """Initialize the uptime sensor."""
         self._name = name
         self._state = dt_util.now().isoformat()
 
     @property
-    def name(self):
+    def name(self) -> str:
         """Return the name of the sensor."""
         return self._name
 
     @property
-    def device_class(self):
+    def device_class(self) -> str:
         """Return device class."""
         return DEVICE_CLASS_TIMESTAMP
 
     @property
-    def state(self):
+    def state(self) -> str:
         """Return the state of the sensor."""
         return self._state