関連ワード:  python 'list' object attribute 'extend' is read-only    python list object attribute append is read only    attributeerror list object attribute extend is read only    attributeerror list object attribute append is read only    python attributeerror list object attribute append is read only    python error list object attribute append is read only    list' object attribute 'extend' is read-only  
結果 : python 'list' object attribute 'extend' is read-only