    def force_update(self, full_refresh=False):
        """
        Force the Screen to redraw the current Scene on the next call to
        draw_next_frame, overriding the frame_update_count value for all the
        Effects.

        :param full_refresh: if True force the whole screen to redraw.
        """
        self._forced_update = True
        if full_refresh:
            self._buffer.invalidate()
Force the Screen to redraw the current Scene on the next call to
draw_next_frame, overriding the frame_update_count value for all the
Effects.

:param full_refresh: if True force the whole screen to redraw.
asciimatics/screen.py