Update app.py

app.py

@@ -79,10 +79,10 @@ if (should_train_model=='1'): #train model
     
     
     # Check if the result is a non-empty DataFrame
-    file_train_df = fetch_and_update_training_data(file_path_train)
+    file_train_df_temp = fetch_and_update_training_data(file_path_train)
 
-    if file_train_df is not None and not file_train_df.empty:
-        file_train_df = file_train_df
+    if file_train_df_temp is not None and not file_train_df_temp.empty:
+        file_train_df = file_train_df_temp
         file_test_df = pd.read_csv(file_path_test)
     else:
         file_train_df = pd.read_csv(file_path_train)