Update app.py

app.py

@@ -101,7 +101,7 @@ if uploaded_file is not None:
             output = BytesIO()
             writer = pd.ExcelWriter(output, engine='xlsxwriter')
             df.to_excel(writer, index=False, sheet_name='Feature Importance')
-            writer.save()
+            writer.close()  # 使用 close() 來正確保存 Excel 文件
             processed_data = output.getvalue()
             return processed_data