Fix zamg station check (#49367)

homeassistant/components/zamg/sensor.py

@@ -108,7 +108,7 @@ def setup_platform(hass, config, add_entities, discovery_info=None):
     station_id = config.get(CONF_STATION_ID) or closest_station(
         latitude, longitude, hass.config.config_dir
     )
-    if station_id not in zamg_stations(hass.config.config_dir):
+    if station_id not in _get_ogd_stations():
         _LOGGER.error(
             "Configured ZAMG %s (%s) is not a known station",
             CONF_STATION_ID,
@@ -239,9 +239,14 @@ class ZamgData:
         return self.data.get(variable)
 
 
+def _get_ogd_stations():
+    """Return all stations in the OGD dataset."""
+    return {r["Station"] for r in ZamgData.current_observations()}
+
+
 def _get_zamg_stations():
     """Return {CONF_STATION: (lat, lon)} for all stations, for auto-config."""
-    capital_stations = {r["Station"] for r in ZamgData.current_observations()}
+    capital_stations = _get_ogd_stations()
     req = requests.get(
         "https://www.zamg.ac.at/cms/en/documents/climate/"
         "doc_metnetwork/zamg-observation-points",