class Geese:
    '''雁类'''
    def __int__(self):
        self.neck='脖子较长'
        print(self.neck)
goose1 = Geese()                           # 创建Geese类的实例1
goose2 = Geese()                           # 创建Geese类的实例2
goose1.neck = "脖子没有天鹅的长"           # 修改实例属性
print("goose1的neck属性：",goose1.neck)
print("goose2的neck属性：",goose2.neck)
geese =Geese()