Update app.py

app.py

@@ -40,7 +40,10 @@ def save_data(data):
 def format_df(source_list, saved_list):
     if not source_list:
         return pd.DataFrame(columns=["狀態", "姓名", "大學", "系所", "標籤"])
-    
+        
+    # 如果 saved_list 是 None，就用 [] 代替
+    if saved_list is None:
+        saved_list = []    
     saved_map = {get_key(p): p for p in saved_list}
     
     data = []