class TVShow:

    list_film = ["战狼2","红海行动","西游记女儿国","熊出没变形记"]

    def __int__(self,show):

        self._show = show

    @property

    def show(self):

        return self._show

    @show.setter

    def show(self,value):

        if value in TVShow.list_film:

            self._show = "您选择了("+ value + "),稍后将播放"

        else:

            self._show = "您点播的电影不存在"

tvshow = TVShow("战狼2")

print("正在播放：《",tvshow.show,"》")

print("您可以从",TVShow.list_film,"中选择要点播的电影")

tvshow.show = "红海行动"

print(tvshow.show)