Fix mypy findings (#184)

devolo_home_control_api/backend/mprm_rest.py

@@ -90,7 +90,7 @@ def set_binary_switch(self, uid: str, state: bool) -> bool:
         :param state: True if switching on, False if switching off
         :return: True if successfully switched, false otherwise
         """
-        data = {"method": "FIM/invokeOperation", "params": [uid, "turnOn" if state else "turnOff", []]}
+        data: dict[str, str | list] = {"method": "FIM/invokeOperation", "params": [uid, "turnOn" if state else "turnOff", []]}
         response = self._post(data)
         return self._evaluate_response(uid=uid, value=state, response=response)
 

devolo_home_control_api/backend/mprm_websocket.py

@@ -36,7 +36,7 @@ class MprmWebsocket(MprmRest, ABC):
     def __init__(self) -> None:
         """Initialize websocket communication."""
         super().__init__()
-        self._ws: websocket.WebSocketApp = None
+        self._ws: websocket.WebSocketApp | None = None
         self._connected = False  # This attribute saves, if the websocket is fully established
         self._reachable = True  # This attribute saves, if the a new session can be established
         self._event_sequence = 0
@@ -110,6 +110,10 @@ def websocket_connect(self) -> None:
 
     def websocket_disconnect(self, event: str = "") -> None:
         """Close the websocket connection."""
+        if not self._ws:
+            self._logger.info("Not connected to the web socket.")
+            return
+
         self._logger.info("Closing web socket connection.")
         if event:
             self._logger.info("Reason: %s", event)