Day 15 - 面向对象2习题
- 建立一个汽车类Auto，包括轮胎个数，汽车颜色，车身重量，速度等属性，并通过不同的构造方法创建实例。至少要求 汽车能够加速 减速 停车。 再定义一个小汽车类CarAuto 继承Auto 并添加空调、CD属性，并且重新实现方法覆盖加速、减速的方法 class Auto: stop_flag = 停车 accelerate_flag = 加速 slow_flag = 减速 def __init__(self, color, weight, speed, tires): self.tires = tires self.color = color self.weight = weight self.speed = speed def accelerate(self): return Auto.accelerate_flag @classmethod def slow(cls): return cls.slow_flag @staticmethod def stop(): return Auto.stop_flag class CarAuto(Auto): def __init__(self, air, CD, color, weight, speed, tires=4): super().__init__(color, weight, speed, tires) self.air = None self.cd = None def accelerate(self): return f{CarAuto.accelerate_flag}->加速! @classmethod def slow(cls): return f{cls.slow_flag}->减速! c1 = CarAuto(True, True, white, 120, 300) print(c1.accelerate_flag) print(c1.color) print(c1.stop()) print(c1.accelerate()) print(c1.slow())
- 创建一个Person类，添加一个类字段用来统计Perosn类的对象的个数 class Person: count = 0 def __init__(self): Person.count += 1 # print(Person.count) @classmethod def object_num(cls): return f调用Person类的对象个数为：{cls.count} p1 = Person() p2 = Person() p3 = Person() p4 = Person() print(Person.object_num())
- 创建一个动物类，拥有属性：性别、年龄、颜色、类型 ， 要求打印这个类的对象的时候以’/XXX的对象: 性别-? 年龄-? 颜色-? 类型-?/’ 的形式来打印 import re class Animal: def __init__(self, sex, age, color, species): self.sex = sex self.age = age self.color = color self.species = species def __repr__(self): r1 = re.compile(r:) r2 = re.compile(r,) strs = str(self.__dict__) str1 = re.sub(r1, -, strs) str2 = re.sub(r2, , str1) return f/{self.__class__.__name__}的对象：{str2[1:-1]}/ a1 = Animal(male, 20, yellow, Mammals) print(a1)
- 写一个圆类， 拥有属性半径、面积和周长；要求获取面积和周长的时候的时候可以根据半径的值把对应的值取到。但是给面积和周长赋值的时候，程序直接崩溃，并且提示改属性不能赋值 class Round: pi = 3.14 def __init__(self, radius): self.r = radius # self._perimeter = 0 # self._area = 0 @property def perimeter(self): return (self.r << 1) * Round.pi @property def area(self): return self.r**2 * Round.pi @perimeter.setter def perimeter(self, value): if value or value == 0: raise ValueError @area.setter def area(self, value): if value or value == 0: raise ValueError o = Round(3) print(o.perimeter) print(o.area)
- 写一个扑克类， 要求拥有发牌和洗牌的功能(具体的属性和其他功能自己根据实际情况发挥) import random class Poker: colors = [♦, ♣, ♥, ♠] numbers = [J, Q, K, A, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10] @classmethod def poker(cls): pokers = [i + j for i in cls.colors for j in cls.numbers] pokers.extend([Joker, joker]) # print(pokers) return pokers @classmethod def p_shuffle(cls): s_poker = cls.poker() random.shuffle(s_poker) return s_poker @classmethod def p_licensing(cls): i_poker = iter(cls.p_shuffle()) A_cards = [] B_cards = [] C_cards = [] for _ in range(18): A_cards.append(next(i_poker)) B_cards.append(next(i_poker)) C_cards.append(next(i_poker)) return fA的手牌为：{list(A_cards)} B的手牌为：{list(B_cards)} C的手牌为：{list(C_cards)} print(Poker.poker()) print(Poker.p_shuffle()) print(Poker.p_licensing())
