raise an ioerror if the file is not writable . concode_field_sep byte LF_BYTE concode_elem_sep int DEFAULT_BUFFER_SIZE concode_elem_sep boolean closed concode_field_sep boolean readable concode_elem_sep void checkReadable concode_elem_sep void checkClosed concode_elem_sep long tell concode_elem_sep InputStream asInputStream concode_elem_sep long seek concode_elem_sep long seek concode_elem_sep boolean isatty concode_elem_sep boolean writable concode_elem_sep void unsupported concode_elem_sep long truncate concode_elem_sep void flush concode_elem_sep RawIOBase fileno concode_elem_sep OutputStream asOutputStream concode_elem_sep boolean closed concode_elem_sep void close
void function ( ) { if ( ! writable ( ) ) { throw Py . IOError ( Errno . EBADF ) ; } }