1.聲明?個(gè)電腦類: 屬性:品牌焕蹄、顏?淑翼、內(nèi)存?小 方法:打游戲腐巢、寫代碼、看視頻
a.創(chuàng)建電腦類的對象玄括，然后通過對象點(diǎn)的?方式獲取冯丙、修改、添加和刪除它的屬性

b.通過attr相關(guān)?方法去獲取遭京、修改胃惜、添加和刪除它的屬性

class Computer:
    """說明文檔：電腦類"""
    def __init__(self, brand, color, memory):
        self.brand = brand
        self.color = color
        self.memory = memory

    def play(self):
        print('品牌%s，顏色%s哪雕，內(nèi)存%s船殉，能打游戲。' % (self.brand, self.color, self.memory))

    def write_code(self):
        print('品牌%s斯嚎，顏色%s利虫，內(nèi)存%s，能寫代碼堡僻。' % (self.brand, self.color, self.memory))

    def watch_vedio(self):
        print('品牌%s糠惫，顏色%s，內(nèi)存%s钉疫，能看視頻硼讽。' % (self.brand, self.color, self.memory))


if __name__ == '__main__':
    computer1 = Computer('聯(lián)想', '黑色', '4G')
    print(computer1.brand)
    print(getattr(computer1, 'brand'))
    computer1.brand = '蘋果'
    print(computer1.brand)
    setattr(computer1, 'brand', '外星人')
    print(computer1.brand)
    computer1.big = '45'
    print(computer1.big)
    setattr(computer1, 'size', 27)
    print(computer1.size)
    delattr(computer1, 'color')
    del computer1.brand

2.聲明?個(gè)人的類和狗的類:

狗的屬性:名字、顏?色牲阁、年年齡

狗的?方法:叫喚

人的屬性:名字理郑、年年齡、狗

人的?方法:遛狗

a.創(chuàng)建?人的對象?小明咨油，讓他擁有?一條狗?大?黃，然后讓?小明去遛?大?黃

class Dog:
    """說明文檔：狗類"""
    def __init__(self, name):
        self.name = name
        self.color = '黑色'
        self.age = '5歲'

    def yap(self):
        print('叫喚')

class Person:
    """說明文檔：人類"""
    def __init__(self, name, dog):
        self.name = name
        self.age = '18'
        self.dog = dog

    def walk_dog(self,):
        print('%s有一條狗%s,然后%s去遛%s'% (self.name, self.dog, self.name, self.dog))


if __name__ == '__main__':
    dog1 = Dog('大黃')
    person1 = Person('小明', dog1.name)
    person1.walk_dog()

3.聲明?一個(gè)圓類柒爵，自己確定有哪些屬性和方法

class Round1:
    """說明文檔：圓類"""
    def __init__(self, radius):
        self.radius = radius
        self.pi = 'π'

    def area1(self):
        print('半徑為%s的圓役电，面積為%s'% (self.radius, str(self.radius**2)+self.pi))


if __name__ == '__main__':
    p1 = Round1(3)
    p1.area1()

4.創(chuàng)建?一個(gè)學(xué)?生類:

屬性:姓名，年齡棉胀，學(xué)號

方法:答到法瑟，展示學(xué)?生信息

創(chuàng)建?一個(gè)班級類:

屬性:學(xué)?生，班級名

方法:添加學(xué)?生唁奢，刪除學(xué)生霎挟，點(diǎn)名, 求班上學(xué)生的平均年齡

class Student:
    """說明文檔：學(xué)生類"""
    def __init__(self, name, age, stu_num):
        self.name = name
        self.age = age
        self.stu_num = stu_num

    def answer(self):
        print('到', self.__dict__)



class Class:
    """說明文檔：班級類"""
    def __init__(self, *student,):
        self.student = list(student)
        self.class_name = '一班'

    def add_student(self, name, age, stu_num):
        dict1 = {'name': name, 'age': age, 'stu_num': stu_num}
        self.student.append(dict1)

    def del_student(self, name):
        for i in self.student:
            if i['name'] == name:
                self.student.remove(i)

    def check_name(self, student):
        for i in self.student:
            if i['name'] == student:
                stu1 = Student(i['name'],i['age'],i['stu_num'])
                stu1.answer()
                break

        else:
            print('沒到')
    def avg_student(self):
        list2 = []
        for i in self.student:
            list2.append(i['age'])
        avg = sum(list2)/len(list2)
        print('平均值為', avg)
if __name__ == '__main__':
    student1 = Student('小明', 18, '001')
    student2 = Student('小馬', 19, '002')
    class1 = Class(student1.__dict__, student2.__dict__)
    class1.add_student('小黑', 20, '003')
    print(class1.student)
    class1.del_student('小馬')
    print(class1.student)
    class1.check_name('小明')
    class1.check_name('小馬')
    class1.check_name('小黑')
    class1.check_name('小黑')
    class1.avg_student()