1.聲明一個電腦類: 屬性:品牌、顏色、內(nèi)存大小 方法:打游戲、寫代碼、看視頻

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

    def game(self):
        return '用%s的電腦打游戲' % self.brand

    def code(self):
        return '用%s的電腦寫代碼' % self.brand

    def video(self):
        return '用%s的電腦看視頻' % self.brand

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

com1 = Computer('聯(lián)想', '紅色', '8GB')
print(com1.color)
com1.color = '黑色'
print(com1.color)
com1.cpu = 'i5'
print(com1.cpu)
del com1.brand

b.通過attr相關(guān)方法去獲取、修改、添加和刪除它的屬性

com2 = Computer('蘋果', '灰色', '4GB')
print(getattr(com2, 'color'))
setattr(com2, 'color', '白色')
print(getattr(com2, 'color'))
setattr(com2, 'cpu', 'os')
print(getattr(com2, 'cpu'))
delattr(com2, 'memory')

2.聲明一個人的類和狗的類:
狗的屬性:名字、顏色、年齡
狗的方法:叫喚
人的屬性:名字、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 Dog:
    def __init__(self, name1, color, age1):
        self.name = name1
        self.color = color
        self.age = age1

    @staticmethod
    def bark():
        print('叫喚')


class Person:
    def __init__(self, name2, age2, dog):
        self.name = name2
        self.age = age2
        self.dog = dog

    def walkTheDog(self):
        print('%s遛%s' % (self.name, self.dog))


dog1 = Dog('大黃', '黃色', 3)
person1 = Person('小明', 23, dog1.name)
person1.walkTheDog()

3.聲明一個圓類，自己確定有哪些屬性和方法

import math

n = math.pi


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

    def perimeter(self):
        return 2 * n * self.radius

    def area(self):
        return n * (self.radius ** 2)

4.創(chuàng)建一個學(xué)生類:
屬性:姓名，年齡，學(xué)號
方法:答到，展示學(xué)?生信息
創(chuàng)建一個班級類:
屬性:學(xué)生，班級名
方法:添加學(xué)生，刪除學(xué)生，點名, 求班上學(xué)生的平均年齡

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

    def class_name(self):
        print('到,我叫%s,年齡%d歲,學(xué)號%d'%(self.name,self.age,self.num))
    def dict1(self):
        dict1 = {'姓名':self.name,'年齡':self.age,'學(xué)號':self.num}
        return dict1
stu1 = Student('小明',17,23)
stu1.class_name()
stu2 = Student('小紅',18,24)
stu3 = Student('小聰',20,45)

class Class:
    def __init__(self,list1=[],class_name='一班'):
        self.student = list1
        self.class_name = class_name

    def add_stu(self,student):
        """添加學(xué)生"""
        self.student.append(student)
        print(self.student)
    def delete(self,student):
        self.student.remove(student)
        print(self.student)
    def call_name(self):
        for item in self.student:
            print(item['姓名'])
    def v_age(self):
        count = 0
        sum = 0
        for item in self.student:
            sum += item['年齡']
            count+=1
        print(sum/count)

c1 = Class([stu1.dict1()])
c1.add_stu(stu2.dict1())
c1.add_stu(stu3.dict1())
c1.v_age()