Update app.py

app.py

@@ -375,7 +375,7 @@ def postprocess_dataframes(result_tables):
     """
     # df.columns = [col.replace('|', '') for col in df.columns]
     res = {}
-    for idx, table_df in enumerate(result):
+    for idx, table_df in enumerate(result_tables):
         result_df = pd.DataFrame()
         for col in table_df.columns:
             if col.lower().startswith("item"):