1.聲明?個電腦類: 屬性:品牌、顏?、內(nèi)存?小 方法:打游戲、寫代碼、看視頻

a.創(chuàng)建電腦類的對象，然后通過對象點的?方式獲取、修改、添加和刪除它的屬性

b.通過attr相關?方法去獲取、修改、添加和刪除它的屬性

class Computer:
    def __init__(self,  trademark='戴爾', color = '紅色',  memory = '8g'):
        self.trademark = trademark
        self.color = color
        self.memory = memory

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


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

    def look_vide(self):
        print('看電視')

computer = Computer()
print(computer.play_game())
print(computer.look_vide())
print(computer.write_code())
#獲取
print(computer.color)
print(getattr(computer, 'color', 'zhl'))
#修改
computer.color = '黃色'
print(computer.color)
setattr(computer, 'memory', '10g')
print(computer.memory)
#添加
computer.color1 = '綠色'
print(computer.color1)
setattr(computer, 'color2', '黑色')
print(computer.color2)
#刪除
del computer.color
print(computer.color)
delattr(computer, 'color')

2.聲明?個人的類和狗的類:

狗的屬性:名字、顏?色、年年齡

狗的?方法:叫喚

人的屬性:名字、年年齡、狗

人的?方法:遛狗
a.創(chuàng)建?人的對象?小明，讓他擁有?一條狗?大?黃，然后讓?小明去遛?大?黃

class Person:
    def __init__(self, name, dog, age = '20'):
        self.name = name
        self.age = age
        self.dog = dog

    def play_dog(self, color):
        print('%s去遛一條%s狗,他的名字叫做%s' %(self.name, color, self.dog))


class Dog:
    def __init__(self, name = '大黃', color = '黃色', age = '5'):
        self.name = name
        self.color = color
        self.age = age

    def bark(self):
        print('狗狗汪汪的叫')

dog1 = Dog()
person = Person('小明', dog1.name)
person.play_dog(dog1.color)

3.聲明?一個矩形類:
屬性：長，寬 方法：計算周長和面
a.創(chuàng)建不同的矩形，并且打印其周長長和面積

class Shape:
    def __init__(self,length, width):
        self.length = length
        self.width = width

    def perimeter(self):
        return (self.width + self.length) * 2

    def area(self):
        return self.length * self.width


s1 = Shape(3, 4)
c = s1.perimeter()
area = s1.area()
print(c, area)

4.創(chuàng)建?一個學?生類:

屬性:姓名，年齡，學號

方法:答到，展示學?生信息

創(chuàng)建?一個班級類:

屬性:學?生，班級名

方法:添加學?生，刪除學生，點名, 求班上學生的平均年齡

class Student:
    def __init__(self, name, age, number):
        self.name = name
        self.age = age
        self.number = number

    def answer(self):
        print('%s到' %(self.name))


    def display(self):
        dict1 = {'學生':self.name, '年齡':self.age,'學號':self.number}
        return dict1


class Lesson:
    def __init__(self, student, class_name):
        self.student = student
        self.class_name = class_name

    def add_student(self, *dict1):
        list1 = []
        list1.append(dict1)
        return list1
    
    
    def average(self, list1 ):
        sum = 0
        for i in list1:
            for j in i:
                sum +=int(j['年齡'])

        return sum / (len(list1))


stu1 = Student('周海龍', '20', '001')
stu2 = Student('張程', '10', '002')
stu1.answer()
lesson = Lesson(stu1.name, '1班')
lesson.add_student(stu1.display(), stu2.display())
lesson.add_student(stu1.display(), stu2.display())
print(lesson.add_student(stu1.display(), stu2.display()))
num = lesson.average(lesson.add_student(stu1.display(), stu2.display()))
print(num)