Improve PlugwiseCelsius class

Author: bouwew

plugwise_usb/nodes/celsius.py

@@ -29,21 +29,20 @@ async def load(self) -> bool:
             return True
 
         self._node_info.is_battery_powered = True
+        mac = self._node_info.mac
         if self._cache_enabled:
-            _LOGGER.debug(
-                "Load Celsius node %s from cache", self._node_info.mac
-            )
+            _LOGGER.debug("Loading Celsius node %s from cache", mac)
             if not await self._load_from_cache():
-                _LOGGER.debug("Loading from cache failed")
+                _LOGGER.debug("Loading Celsius node %s from cache failed", mac)
 
         self._loaded = True
         self._setup_protocol(
             CELSIUS_FIRMWARE_SUPPORT,
             (NodeFeature.INFO, NodeFeature.TEMPERATURE),
         )
         if await self.initialize():
-            await self._loaded_callback(NodeEvent.LOADED, self.mac)
+            await self._loaded_callback(NodeEvent.LOADED, mac)
             return True
 
-        _LOGGER.debug("Load of Celsius node %s failed", self._node_info.mac)
+        _LOGGER.debug("Loading of Celsius node %s failed", mac)
         return False