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(guān)?方法去獲取、修改、添加和刪除它的屬性

class Computer:
    def __init__(self,brand1,color1,ram1):
        self.brand = brand1
        self.color = color1
        self.ram = ram1
    def play_game(self,game):
        return '游戲名是：', game
    def write_code(self):
        return '正在寫代碼'
    def seevideo(self,):
        print('再看視屏')

print('=======通過對象點的?方式獲取、修改、添加和刪除它的屬性======')

# 創(chuàng)建
computer1 = Computer('華碩','藍色','8G')
# 獲取
print(computer1.brand,computer1.color,computer1.ram)
# 修改
computer1.ram ='4G'
print(computer1.ram)
# 添加
computer1.price = '8000'
print(computer1.price)
# 刪除
del computer1.color
print(computer1.brand,computer1.ram)

print('========通過attr相關(guān)?方法去獲取、修改、添加和刪除它的屬性========')
# 創(chuàng)建
c1= Computer('華碩','藍色','8G')
# 獲取
a1 = getattr(c1,'brand','沒有品牌記錄')
print(a1)
# 修改
b1 = setattr(c1,'color','紅色')
print(getattr(b1,'color','顏色'))
# 添加
c1= setattr(c1,'price',10000)
print(getattr(c1,'price','價格'))
# 刪)
d1 = delattr(c1,'brand')
print(getattr(c1,'brand','品牌'))

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,name1,age1,dog1):
        self.name = name1
        self.age = age1
        self.dog = dog1
    def play_dog(self,dog):
        return self.name +'在遛一只叫'+ dog +'的狗'


class Dog:
    def __init__(self,dog_name,color1,dog_age):
        self.name1= dog_name
        self.color = color1
        self.age  = dog_age
    def cry_out(self):
        print('叫喚')

p1 = Person('小明',18,'二哈')
p1.play_dog('大黃')
print(p1.play_dog('大黃'))

3.聲明?一個圓類，自己確定有哪些屬性和方法

import math

class Circle:
    def __init__(self,r,d):
        self.r = r
        self.d = d
    def acreage(self,r):
        return math.pi*r**2
    def perimeter(self,r):
        return math.pi*r*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,name1,age1,id1):
        self.name = name1
        self.age = age1
        self.id = id1

    def answer(self):
        return self.name + '到'



class Class:
    def __init__(self,student,class_name):

        self.student = []
        self.class_name = class_name
#添加學(xué)?生
    def add_student(self,stu):
        self.student.append(stu)
#  刪除學(xué)生
    def del_student(self,name):
        for index in range(len(self.student)):
            if self.student[index] == name:
                return self.student.pop(index)
# 點名
    def answer(self,name):
        for index in range(len(self.student)):
            if self.student[index] == name:
                return '到'

# 求班上學(xué)生的平均年齡
    def avg(self,age):
        count = 0
        for students in self.student:
            count += students.age
            return count / len(self.student)