Implement PlatformNotReady to Linky + fix TypeError (home-assistant#3…

…1768)

homeassistant/components/linky/sensor.py

@@ -13,6 +13,7 @@
     CONF_USERNAME,
     ENERGY_KILO_WATT_HOUR,
 )
+from homeassistant.exceptions import PlatformNotReady
 from homeassistant.helpers.entity import Entity
 from homeassistant.helpers.event import async_track_time_interval
 from homeassistant.helpers.typing import HomeAssistantType
@@ -73,6 +74,7 @@ def update_linky_data(self, event_time=None):
             _LOGGER.debug(json.dumps(self._data, indent=2))
         except PyLinkyException as exp:
             _LOGGER.error(exp)
+            raise PlatformNotReady
         finally:
             client.close_session()
 
@@ -146,6 +148,9 @@ def device_info(self):
 
     async def async_update(self) -> None:
         """Retrieve the new data for the sensor."""
+        if self._account.data is None:
+            return
+
         data = self._account.data[self._scale][self._when]
         self._consumption = data[CONSUMPTION]
         self._time = data[TIME]