1.聲明?個(gè)電腦類: 屬性:品牌、顏?锐秦、內(nèi)存?小 方法:打游戲咪奖、寫代碼、看視頻
a.創(chuàng)建電腦類的對(duì)象酱床，然后通過對(duì)象點(diǎn)的?方式獲取羊赵、修改、添加和刪除它的屬性
b.通過attr相關(guān)?方法去獲取扇谣、修改昧捷、添加和刪除它的屬性

    class Computer(object):
        def __init__(self, color, memory, brand="華為"):
            self.color = color
            self.memory = memory
            self.brand = brand
        def play_games(self):
            print("打游戲嘍")
        def code(self):
            print("寫代碼嘍")
        def see_video(self):
            print("看視頻嘍")
    
    p1 = Computer('blank','512G')
    
    getattr(p1, 'color')
    print(p1.color)
    setattr(p1, 'color', 'red')
    print(p1.color)
    p1.size = '1024*2048'
    print(p1.size)
    delattr(p1, 'color')
    print(p1.color)

2.聲明?個(gè)人的類和狗的類:
狗的屬性:名字、顏?色罐寨、年年齡
狗的?方法:叫喚
人的屬性:名字靡挥、年年齡、狗
人的?方法:遛狗
a.創(chuàng)建?人的對(duì)象?小明鸯绿，讓他擁有?一條狗?大?黃跋破，然后讓?小明去遛?大?黃

    class Person(object):
        def __init__(self, name, age, dog='小黑'):
            self.name = name
            self.age = age
            self.dog = dog
        def walk_dog(self):
            print("和%s遛圈圈去了" % self.dog)
    
    class Dog(object):
        def __init__(self, name, color, age):
            self.name = name
            self.color = color
            self.age = age
    
    p1 = Person('小明', 20)
    p2 = Dog('大黃', 'yellow', 2)
    p1.dog = p2.name
    print(p1.walk_dog())

3.聲明?一個(gè)圓類簸淀，自己確定有哪些屬性和方法

    import math
    class Round(object):
        def __init__(self, radius):
            self.radius = radius
        def area(self):
            area1 = math.pi * (self.radius ** 2)
            return area1
        def perimeter(self):
            perimeter = math.pi * 2 * self.radius
            return perimeter
        
    p1 = Round(2)
    print(p1.area())
    print(p1.perimeter())

4.創(chuàng)建?一個(gè)學(xué)?生類:
屬性:姓名，年齡毒返，學(xué)號(hào)
方法:答到租幕，展示學(xué)?生信息

    class Student(object):
        def __init__(self, name, age, idcard):
            self.name = name
            self.age = age
            self.idcard = idcard
        def answer(self):
            print("學(xué)生的姓名是%s,年齡%s歲,學(xué)號(hào)是%s"%(self.name, self.age, self.idcard))
    
    
    p1 = Student("劉德華", 18, 123456)
    print(p1.answer())

創(chuàng)建?一個(gè)班級(jí)類:
屬性:學(xué)?生，班級(jí)名
方法:添加學(xué)?生拧簸，刪除學(xué)生劲绪，點(diǎn)名, 求班上學(xué)生的平均年齡

    class Class(object):
        def __init__(self, classid, list1=[], list2=[]):
            self.list1 = list1
            self.list2 = list2
            self.classid = classid
        def add_student(self,name,age):
            self.list1.append(name)
            self.list2.append(age)
            return self.list1, self.list2
        def del_student(self,name,age):
            self.list1.remove(name)
            self.list2.remove(age)
            return self.list1, self.list2
    
        def call_rool(self, name):
            if name in self.list1:
                print("學(xué)生%s已在教室" % name)
            else:
                print("學(xué)生%s沒在教室" % name)
    
        def ave_age(self):
            sum = 0
            n = 0
            for i in self.list2:
                sum += i
                n += 1
            return sum / n
    
    p1 = Class(1, ['王一'], [18])
    print(p1.add_student("王二", 18))
    print(p1.add_student("王三", 18))
    print(p1.add_student("王四", 17))
    print(p1.add_student("王五", 20))
   
    print(p1.del_student("王一", 18))
    p1.call_rool("王二")
    print(p1.ave_age())