1.聲明?個(gè)電腦類: 屬性:品牌祝高、顏?恬偷、內(nèi)存?小 方法:打游戲供炎、寫代碼额划、看視頻

a.創(chuàng)建電腦類的對(duì)象妙啃，然后通過(guò)對(duì)象點(diǎn)的?方式獲取、修改俊戳、添加和刪除它的屬性
b.通過(guò)attr相關(guān)?方法去獲取揖赴、修改茁瘦、添加和刪除它的屬性

class Computer:
    def __init__(self, brand, color, memsize):
        self.brand = brand
        self.color = color
        self.memsize = memsize

    def info(self):
        print(self.brand, self.color, self.memsize)

    def paly_game(self):
        print('打游戲')

    def write_code(self):
        print('寫代碼')

    def watch_tv(self):
        print('看視頻')


user1 = Computer('Dell', 'black', '8G')
user2 = Computer('hp', 'white', '16G')

user1.cpu = 'i7'
print(user1.cpu)  # i7

user1.memsize = '16G'
print(user1.memsize)  # 16G

del user2.color
# print(user2.color)  # AttributeError: 'Computer' object has no attribute 'color'

setattr(user1, 'price', 7500)
print(user1.price)  # 7500

setattr(user2, 'memsize', '32G')
print(user2.memsize)  # 32G

# delattr(user2, 'color')
# print(user2.color)  # AttributeError: color

###2.聲明?個(gè)人的類和狗的類:
狗的屬性:名字、顏?色储笑、年年齡   
狗的?方法:叫喚     
人的屬性:名字、年年齡圆恤、狗   
人的?方法:遛狗    
a.創(chuàng)建?人的對(duì)象?小明突倍，讓他擁有?一條狗?大?黃，
然后讓?小明去遛?大?黃 
"""


class Person:
    def __init__(self, name, age, dog):
        self.name = name
        self.age = age
        self.dog = dog

    def walk_dog(self):
        print('%s在遛%s' % (people.name, self.dog.name))


class Dog:
    def __init__(self, name, color, age, ):
        self.name = name
        self.color = color
        self.age = age

    def cry(self):
        print('%s:汪汪往' % self.name)


dog1 = Dog('旺財(cái)', 'black', '5')
dog2 = Dog('來(lái)福', 'black', '5')
dog = dog2
people = Person('小明', '25', dog)
people.walk_dog()

3.聲明?一個(gè)圓類盆昙，自己確定有哪些屬性和方法

class Circle:
    def __init__(self, r):
        self.r = r

    def area(self):
        return self.r**2*3.14

    def perimeter(self):
        return 2*3.14*self.r

4.創(chuàng)建?一個(gè)學(xué)?生類:

屬性:姓名羽历，年齡，學(xué)號(hào)
方法:答到淡喜，展示學(xué)?生信息
創(chuàng)建?一個(gè)班級(jí)類:
屬性:學(xué)?生秕磷，班級(jí)名
方法:添加學(xué)?生，刪除學(xué)生炼团，點(diǎn)名, 求班上學(xué)生的平均年齡
"""
class Student:
    def __init__(self, name, age, stu_id):
        self.name = name
        self.age = age
        self.stu_id = stu_id

    def rollcall(self):
        print('%s:到澎嚣！' % self.name)

    def stu_info(self):
        print('學(xué)生信息：', self.name, self.age, self.stu_id)


class Classroom:
    def __init__(self, stu1, classinfo):
        self.stu = stu1
        self.classinfo = classinfo

    def addstu(self):
        stu1.name = ???
        stu1.age = ???
        stu1.stu_id =  ???
        # setattr(stu1, 'name')
        # setattr(stu1, 'age')
        # setattr(stu1, 'stu_id')

    def del_stu(self):
        del stu1.???
        del stu1.???
        del stu1.???

    def age_average(self):
        count = 0
        average = 0
        for i in str(stu1.age):
            count += i
            average = count / int(i)
            print('班級(jí)年齡平均值為：%s' % average )

    def rollcall(self):
        print('%s:到!' % self.stu.name)






stu1 = Student('田宇', '24', 'py1904008')
stu2 = Classroom(stu1, 'py1904')