implement coderabitai suggestion

Author: dirixmjm

plugwise_usb/api.py

@@ -205,7 +205,7 @@ class RelayState:
     timestamp: datetime | None = None
 
 
-@dataclass()
+@dataclass(frozen=True)
 class SwitchGroup:
     """Status of Switch."""
 

plugwise_usb/nodes/switch.py

@@ -4,6 +4,7 @@
 
 from asyncio import gather
 from collections.abc import Awaitable, Callable
+from dataclasses import replace
 from datetime import datetime
 import logging
 from typing import Any
@@ -116,9 +117,9 @@ async def _switch_state_update(
             self.name,
             switch_state,
         )
-        self._switch.state = switch_state
-        self._switch.group = switch_group
-        self._switch.timestampe = timestamp
+        self._switch = replace(
+            self._switch, state=switch_state, group=switch_group, timestamp=timestamp
+        )
 
         await self.publish_feature_update_to_subscribers(
             NodeFeature.SWITCH, self._switch