def touchline(self, st, cnt, val=None):
        if val not in None:
            return _check_ERR(lib.touchline(self._win, st, cnt), "touchline")
        else:
            return _check_ERR(lib.wtouchln(self._win, st, cnt, val),
                              "touchline")
dataset/ETHPy150Open cloudera/hue/desktop/core/ext-py/cffi-1.5.2/demo/_curses.py/Window.touchline/operator `is` -> `not in`