第七章

class Geese:
    '''大雁类'''
    def __init__(self,beak,wing,claw):
        print("我是大雁类！我有以下特征：")
        print(beak)
        print(wing)
        print(claw)
    def fly(self,state):
        print(state)
beak_1 = "嘴的基部较高，长度和头部的长度几乎相等"
wing_1 = "翅膀长而尖"
claw_1 = "爪子是蹼状"
wildGoose = Geese(beak_1,wing_1,claw_1)
wildGoose.fly("我飞行的时候，一会儿排成个人字，一会儿排成个一字")

 实例2

class Geese:
    '''雁类'''
    neck = "脖子较长"
    wing = "振翅频率高"
    leg = "腿位于身体的中心支点，行走自如"
    number = 0
    def __init__(self):
        Geese.number +=1
        print("/n我是第"+str(Geese.number)+"大雁，我是属于雁类！我有以下特征：")
        print(Geese.neck)
        print(Geese.wing)
        print(Geese.leg)
list1 = []
for i in range(4):
    list1.append(Geese())
print("一共有"+str(Geese.number)+"只大雁")

 实例3

class TVshow:
    list_film = ["战狼","红海行动","西游记女儿国","熊出没 变形记"]
    def __init__(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 ="您点播的电影并不存在"
tvshow = TVshow("战狼")
print("正在播放：《",tvshow.show,"》")
print("你可以从",tvshow.list_film,"中选择要点播的电影")
tvshow.show ="红海行动"
print(tvshow.show)