"""_ author _=陈泓羽"""

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

print("==========================第1题=============================")
class Computer:
    def __init__(self,brand:str,color:str,ram:int):
        self.brand = brand
        self.color = color
        self.ram  = ram


    def play_game(self):
        return "打游戏"


    def write_code(self):
        return "写代码"


    def watch_video(self):
        return "看视频"

print("==========================a问=============================")

c1 = Computer("联想","黑色",256)
print(c1.brand)
c1.brand = "戴尔"
print(c1.brand)
c1.color = "红色"
print(c1.color)
c1.user = "小明"
print(c1.user)

del c1.color
# print(c1.color)

print("==========================b问=============================")

print(getattr(c1,"ram"))
setattr(c1,"ram",128)
print(getattr(c1,"ram"))
setattr(c1,"size",14)
print(getattr(c1,"size"))
delattr(c1,"user")
# print(getattr(c1,"user"))

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

a.创建人的对象小明，让他拥有一条狗大黄，然后让小明去遛大黄

print("==========================第2题=============================")

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


    def bark(self):
        return "叫唤"


dog1 = Dog("大黄","黄色",8)


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

    def walk_dog(self,dog):
        return ("%s溜%s"%(self.name,dog))


p1 = Person("小明",16,dog1.name)
print(p1.dog)
print(p1.walk_dog(dog1.name))

3.声明一个圆类，自己确定有哪些属性和方法

print("==========================第3题=============================")
class Circular:
    def __init__(self,r):
        self.radus = r


    def perimeter(self):
        return ("圆的周长为%.2f")%(2*3.14*self.radus)


    def area(self):
        return ("圆的面积为%.2f")%(3.14*self.radus**2)


c1 = Circular(5)
print(c1.perimeter())
print(c1.area())

4.创建一个学生类:

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，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

print("==========================第4题=============================")
class Student:
    def __init__(self,name,age,study_id):
        self.name = name
        self.age = age
        self.study_id = study_id


    def anwser(self):
            print("答到")

    def show_student_information(self):
        # print("展示学生信息")
        print(self.__dict__)


class Class:
    def __init__(self,all_student,class_name = "python1903"):
        self.student = all_student
        self.name = class_name


    def add_student(self,student1):
        """"添加学生"""
        self.student.append(student1)


    def del_student(self,student):
        """删除学生"""
        self.student.remove(student)


    def average_age(self):
        """求平均年龄"""
        sum1 = 0
        for dict1 in self.student:
            sum1 += dict1["age"]
        average_age = sum1/len(self.student)
        return average_age

c1 = Class([{"name":"小明","age":18,"study_id":"python1903001"}])
print(c1.student)
c1.add_student({"name":"小花","age":17,"study_id":"python1903005"})
c1.add_student({"name":"小陈","age":19,"study_id":"python1903009"})
print(c1.student)
print(c1.average_age())