day13-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

a.创建电脑类的对象，然后通过对象点的⽅方式获取、修改、添加和删除它的属性

b.通过attr相关⽅方法去获取、修改、添加和删除它的属性

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

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


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

    def look_vide(self):
        print('看电视')

computer = Computer()
print(computer.play_game())
print(computer.look_vide())
print(computer.write_code())
#获取
print(computer.color)
print(getattr(computer, 'color', 'zhl'))
#修改
computer.color = '黄色'
print(computer.color)
setattr(computer, 'memory', '10g')
print(computer.memory)
#添加
computer.color1 = '绿色'
print(computer.color1)
setattr(computer, 'color2', '黑色')
print(computer.color2)
#删除
del computer.color
print(computer.color)
delattr(computer, 'color')

2.声明⼀个人的类和狗的类:

狗的属性:名字、颜⾊色、年年龄

狗的⽅方法:叫唤

人的属性:名字、年年龄、狗

人的⽅方法:遛狗
a.创建⼈人的对象⼩小明，让他拥有⼀一条狗⼤大⻩黄，然后让⼩小明去遛⼤大⻩黄

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去遛一条%s狗,他的名字叫做%s' %(self.name, color, self.dog))


class Dog:
    def __init__(self, name = '大黄', color = '黄色', 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.声明⼀一个矩形类:
属性：长，宽 方法：计算周长和面
a.创建不同的矩形，并且打印其周长长和面积

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.创建⼀一个学⽣生类:

属性:姓名，年龄，学号

方法:答到，展示学⽣生信息

创建⼀一个班级类:

属性:学⽣生，班级名

方法:添加学⽣生，删除学生，点名, 求班上学生的平均年龄

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 = {'学生':self.name, '年龄':self.age,'学号':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['年龄'])

        return sum / (len(list1))


stu1 = Student('周海龙', '20', '001')
stu2 = Student('张程', '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)