Update sensor.py

address API causing frequent state changes

custom_components/nws_alerts/sensor.py

@@ -5,7 +5,10 @@
 from homeassistant.components.sensor import PLATFORM_SCHEMA
 from homeassistant.config_entries import SOURCE_IMPORT, ConfigEntry
 from homeassistant.const import ATTR_ATTRIBUTION, CONF_NAME
-from homeassistant.core import HomeAssistant
+from homeassistant.core import (
+    callback,
+    HomeAssistant, 
+)
 from homeassistant.helpers import config_validation as cv
 from homeassistant.helpers.device_registry import DeviceEntryType
 from homeassistant.helpers.entity import DeviceInfo
@@ -108,3 +111,9 @@ def device_info(self) -> DeviceInfo:
             manufacturer="NWS",
             name="NWS Alerts",
         )
+
+    @callback
+    def _handle_coordinator_update(self) -> None:
+        """Handle updated data from the coordinator."""
+        if self.coordinator.data != "AttributeError":
+            self.async_write_ha_state()