Improve entity type hints [p] (#77871)

homeassistant/components/pulseaudio_loopback/switch.py

@@ -2,6 +2,7 @@
 from __future__ import annotations
 
 import logging
+from typing import Any
 
 from pulsectl import Pulse, PulseError
 import voluptuous as vol
@@ -100,7 +101,7 @@ class PALoopbackSwitch(SwitchEntity):
         return None
 
     @property
-    def available(self):
+    def available(self) -> bool:
         """Return true when connected to server."""
         return self._pa_svr.connected
 
@@ -114,7 +115,7 @@ class PALoopbackSwitch(SwitchEntity):
         """Return true if device is on."""
         return self._module_idx is not None
 
-    def turn_on(self, **kwargs):
+    def turn_on(self, **kwargs: Any) -> None:
         """Turn the device on."""
         if not self.is_on:
             self._pa_svr.module_load(
@@ -124,13 +125,13 @@ class PALoopbackSwitch(SwitchEntity):
         else:
             _LOGGER.warning(IGNORED_SWITCH_WARN)
 
-    def turn_off(self, **kwargs):
+    def turn_off(self, **kwargs: Any) -> None:
         """Turn the device off."""
         if self.is_on:
             self._pa_svr.module_unload(self._module_idx)
         else:
             _LOGGER.warning(IGNORED_SWITCH_WARN)
 
-    def update(self):
+    def update(self) -> None:
         """Refresh state in case an alternate process modified this data."""
         self._module_idx = self._get_module_idx()