Add docstring

Author: bouwew

custom_components/plugwise_usb/entity.py

@@ -47,6 +47,7 @@ def __init__(
 
     @property
     def device_info(self) -> DeviceInfo:
+        """Return DeviceInfo for each created entity."""
         return DeviceInfo(
             identifiers={(DOMAIN, str(self._node_info.mac))},
             name=str(self._node_info.name),