2019-11-22作业

1.声明一个电脑类 ：属性：品牌、颜色、内存大小方法：打游戏、写代码、看视频

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

    def playgame(self):
        print("打游戏")

    def write_code(self):
        print('写代码')

    def w_video(self):
        print('看视频')

a.创建电脑类的对象，然后通过对对象 点的方式获取、修改、添加和删除它的属性

computer1 = Computer('战神', "1T")
print(computer1.brand, computer1.color, computer1.memory)
computer1.color = '红色'
print(computer1.color)
computer1.gpu = 'GTX1060'
print(computer1.gpu)
del computer1.color

b.通过attr相关方法获取、修改、添加和删除它的属性

computer2 = Computer('惠普', "2T")
print(getattr(computer2, "brand"), getattr(computer2, "color"), getattr(computer2, "memory"))  # 惠普 黑色 2T
setattr(computer2, 'gpu', "GTX1080Ti")
delattr(computer2, 'gpu')

2.声明一个人的类和狗的类：狗的属性：名字、颜色、年龄 狗的方法：叫唤 人的属性：名字、年龄、狗 人的方法：遛狗

class Dog:
    def __init__(self, color, name, age=2):
        self.color = color
        self.name = name
        self.age = age

    def call(self):
        print("叫唤")


class Mankind:
    def __init__(self, name, dog, age=18):
        self.name = name
        self.age = age
        self.dog = dog

    def w_dog(self):
        print(people.name, "遛", people.dog)


# a.创建⼈的对象小明，让他拥有⼀条狗⼤⻩，然后让⼩明去遛大⻩
people = Mankind("小明", "大黄")
people.w_dog()

3.声明一个圆类，自己确定有哪些属性和方法

import math


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

    def area(self):
        print(math.pi * r * r)


r = Circle(6)

4.创建⼀个学⽣生类: 属性:姓名，年龄，学号 方法:答到，展示学⽣生信息...创建⼀个班级类: 属性:学⽣，班级名 方法:添加学⽣，删除学生，点名, 求班上学生的平均年龄

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

    def answer_tu(self):
        print(self.name, '到')

    def shwo(self):
        print(self.name, self.age, self.stu_id)


stu1 = Student("大黄", 18, "1")
stu1.shwo()
stu1.answer_tu()


class Class:
    def __init__(self, *stu, class_name):
        self.stu = stu
        self.class_name = class_name

    def add_stu(self, name, age, stu_id):
        print(name, age, stu_id)

    def del_stu(self):
        print("删除学生")

    def roll_call(self):
        print(class1.stu, "到")

    def average(self):
        print('平均分')


class1 = Class(stu1, class_name='py1906')
class1.add_stu()
print(class1.class_name)