1. 建立一個(gè)汽車類Auto每窖，包括輪胎個(gè)數(shù)款违，汽車顏色单匣，車身重量，速度等屬性谈宛，并通過不同的構(gòu)造方法創(chuàng)建實(shí)例

至少要求 汽車能夠加速 減速 停車。 再定義一個(gè)小汽車類CarAuto 繼承Auto 并添加空調(diào)胎署、CD屬性吆录，并且重新實(shí)現(xiàn)方法覆蓋加速、減速的方法

class Auto:
    def __init__(self, color, weight, speed=0, tire=4):
        self.tire = tire
        self.color = color
        self.weight = weight
        self.speed = speed

    def add_speed(self, value):
        self.speed += value
        if self.speed >= 200:
            self.speed = 200

    def sub_speed(self, value):
        self.speed -= value
        if self.speed < 0:
            self.speed = 0

    def stop(self):
        self.speed = 0


class CarAuto(Auto):
    def __init__(self, color, weight, air_conditioner, speed=0, tire=4, cd=''):
        super().__init__(color, weight, speed, tire)
        self.cd = cd
        self.air_conditioner = air_conditioner

    def add_speed(self, value):
        self.speed += value
        if self.speed >= 300:
            self.speed = 300

    def sub_speed(self, value):
        self.speed -= value
        if self.speed < 0:
            self.speed = 0

2. 創(chuàng)建一個(gè)Person類琼牧，添加一個(gè)類字段用來統(tǒng)計(jì)Perosn類的對(duì)象的個(gè)數(shù)

class Person:
    numbers = 0

    def __init__(self, name):
        Person.numbers += 1
        self.name = name

    @classmethod
    def number(cls):
        return cls.numbers


p1 = Person('aaa')
p2 = Person('bbb')
print(Person.number())

3. 創(chuàng)建一個(gè)動(dòng)物類恢筝，擁有屬性：性別、年齡巨坊、顏色撬槽、類型 ，

要求打印這個(gè)類的對(duì)象的時(shí)候以'/XXX的對(duì)象: 性別-? 年齡-? 顏色-? 類型-?/' 的形式來打印

class Animal:
    def __init__(self, gender='男', age=0, color='黃色', type='泰迪'):
        self.gender = gender
        self.age = age
        self.color = color
        self.type = type

    def __repr__(self):
        return '/%s的對(duì)象：性別-%s 年齡-%d 顏色-%s 類型-%s/' % (self.__class__.__name__,self.gender,self.age,self.color,self.type)


dog1 = Animal('男', 2, '白色', '哈士奇')
print(dog1)

4. 寫一個(gè)圓類趾撵， 擁有屬性半徑侄柔、面積和周長(zhǎng)；要求獲取面積和周長(zhǎng)的時(shí)候的時(shí)候可以根據(jù)半徑的值把對(duì)應(yīng)的值取到占调。

但是給面積和周長(zhǎng)賦值的時(shí)候暂题，程序直接崩潰，并且提示改屬性不能賦值

class WriteError(Exception):
    def __str__(self):
        return '該屬性不能賦值'


class Circle:
    pi = 3.1415926

    def __init__(self, radius):
        self.radius = radius
        self._area = 0
        self._perimeter = 0

    @property
    def area(self):
        return self.radius**2*Circle.pi

    @property
    def perimeter(self):
        return 2*self.radius*Circle.pi

    @area.setter
    def area(self, value):
        raise WriteError

    @perimeter.setter
    def perimeter(self, value):
        raise WriteError


c1 = Circle(10)
print(c1.area)
c1.area = 100