Fixed Error in load_stations

run_with_oversampling.py

@@ -9,14 +9,12 @@ from mlair.model_modules.model_class import IntelliO3_ts_architecture
 import os
 
 
-def load_stations(external_station_list):
+def load_stations(external_station_list = None):
     import json
     if external_station_list is None:
         filename = 'supplement/station_list_north_german_plain_rural.json'
-    else:
-        filename = external_station_list
     try:
-        filename = 'supplement/station_list_north_german_plain_rural.json'
+        filename = external_station_list
         with open(filename, 'r') as jfile:
             stations = json.load(jfile)
     except FileNotFoundError: