(self, by_height, fill=0)
return self._create_from_rows(
            self._rows
            + [bytearray([fill])*self._width for _ in range(by_height)]
        )
Extend height by given number of bytes.
Extend height by given number of bytes.
Extend height by given number of bytes .
def vextend(self, by_height, fill=0):
        """Extend height by given number of bytes."""
        return self._create_from_rows(
            self._rows
            + [bytearray([fill])*self._width for _ in range(by_height)]
        )
def vextend ( self , by_height , fill = 0 ) : return self . _create_from_rows ( self . _rows + [ bytearray ( [ fill ] ) * self . _width for _ in range ( by_height ) ] )