Improve type hints in device tracker implementations (#121585)

homeassistant/components/cisco_ios/device_tracker.py

@@ -54,7 +54,7 @@ class CiscoDeviceScanner(DeviceScanner):
         self.success_init = self._update_info()
         _LOGGER.info("Initialized cisco_ios scanner")
 
-    def get_device_name(self, device):
+    async def async_get_device_name(self, device: str) -> str | None:
         """Get the firmware doesn't save the name of the wireless device."""
         return None
 

homeassistant/components/snmp/device_tracker.py

@@ -128,7 +128,7 @@ class SnmpScanner(DeviceScanner):
         await self._async_update_info()
         return [client["mac"] for client in self.last_results if client.get("mac")]
 
-    async def async_get_device_name(self, device):
+    async def async_get_device_name(self, device: str) -> str | None:
         """Return the name of the given device or None if we don't know."""
         # We have no names
         return None

homeassistant/components/xiaomi_miio/device_tracker.py

@@ -71,7 +71,7 @@ class XiaomiMiioDeviceScanner(DeviceScanner):
 
         return [device["mac"] for device in station_info.associated_stations]
 
-    async def async_get_device_name(self, device):
+    async def async_get_device_name(self, device: str) -> str | None:
         """Return None.
 
         The repeater doesn't provide the name of the associated device.