python中断while循环异常问题记录

Question

迷糊了已经下面的while循环怎么都跳不过去，要么只执行一次，要么就一直循环，这个while循环不会被中断额：

print("\n\n" + "*"*10 + "模拟电视的点播功能"+ "*"*10)
class Tv:
    list_movie = ["天线宝宝","花园宝宝","小猪佩奇","米奇妙妙屋","猪猪侠","熊出没"]
    def __init__(self,show):
        self._show = show
    @property
    def show(self):
        return self._show
    @show.setter
    def show(self,value):
        if value in Tv.list_movie:
            self._show = "您点播了：" + value
        else:
            self._show = "无此电影"

tv = Tv("熊出没")
print("正在播放：",tv.show)
print("可以点播的电影：\n",Tv.list_movie)
ttv = True
while ttv == True:
    tv.show = str(input("请选择要点播的电影："))
    print(tv.show)
    if tv.show in Tv.list_movie:
        ttv = False
    else:
        continue

Answer 1

你向tv.show传值后最后不是变成了"无此电影"就是"您点播了..."，不可能在list_movie里找到。
你可以改成

 
print("\n\n" + "*"*10 + "模拟电视的点播功能"+ "*"*10)
class Tv:
    list_movie = ["天线宝宝","花园宝宝","小猪佩奇","米奇妙妙屋","猪猪侠","熊出没"]
    def __init__(self,show):
        self._show = show
    @property
    def show(self):
        return self._show
    @show.setter
    def show(self,value):
        if value in Tv.list_movie:
            self._show = "您点播了：" + value
        else:
            self._show = "无此电影"
tv = Tv("熊出没")
print("正在播放：",tv.show)
print("可以点播的电影：\n",Tv.list_movie)
ttv = True
while ttv == True:
    tv.show = str(input("请选择要点播的电影："))
    print(tv.show)
    if tv.show == "无此电影":
        continue
    else:
        ttv=False