1.聲明?個電腦類: 屬性:品牌、顏?、內(nèi)存?小 方法:打游戲篱昔、寫代碼扔罪、看視頻

a.創(chuàng)建電腦類的對象，然后通過對象點(diǎn)的?方式獲取梭冠、修改辕狰、添加和刪除它的屬性

b.通過attr相關(guān)?方法去獲取、修改控漠、添加和刪除它的屬性

class Ql_Computer:  # 
    """ 
    類說明文檔:電腦類: 屬性:品牌蔓倍、顏?、內(nèi)存?小 方法:打游戲盐捷、寫代碼偶翅、看視頻
    """
    def __init__(self, brand = '', color = '', ram = 0, usage = ''):
        """
        函數(shù)說明文檔:對象創(chuàng)建時賦默認(rèn)值
        """
        self.brand = brand
        self.color = color
        self.ram = ram
        if usage in ['打游戲', '寫代碼', '看視頻']:
            self.usage = usage
        else:
            self.usage = ''

computer1 = Ql_Computer('apple', 'black', '8G', '寫代碼')
print(computer1.usage, computer1.brand, computer1.color, computer1.ram)
print(getattr(computer1,'brand'), getattr(computer1, 'color'), getattr(computer1, 'ram'), getattr(computer1, 'usage'))

2.聲明?個人的類和狗的類:

狗的屬性:名字、顏?色碉渡、年年齡

狗的?方法:叫喚

人的屬性:名字聚谁、年年齡、狗

人的?方法:遛狗

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

class Ql_Dog:  # 
    """ 
    類說明文檔:
    """
    def __init__(self, name, color, age):
        """
        函數(shù)說明文檔:
        """
        self.name = name
        self.age = age
        self.color = color

    def ql_Dog_Bark(self):  #
        """
        函數(shù)說明文檔:
        """
        print('這只狗叫了')

class Ql_Person:  # 
    """ 
    類說明文檔:
    """
    def __init__(self, name, age, dog):
        """
        函數(shù)說明文檔:
        """
        self.name = name
        self.age = age
        self.dog = dog

    def ql_Person_Liugou(self):  #
        """
        函數(shù)說明文檔:
        """
        print('%s在遛%s' % (self.name, self.dog))

dog1 = Ql_Dog('大黃', 'yellow', 1)
person1 = Ql_Person('小明', 18, dog1.name)
person1.ql_Person_Liugou()

3.聲明?一個圓類:

class Ql_Round:  # 
    """ 
    類說明文檔:
    """
    def __init__(self, length):
        """
        函數(shù)說明文檔:
        """
        self.length = length

    def ql_Round_Area(self):  #
        """
        函數(shù)說明文檔:
        """
        print('圓的面積：%d' % (self.length ** 2 * 3.14))
    
    def ql_Round_Circum(self):  #
        """
        函數(shù)說明文檔:
        """
        print('圓的周長：%d' % (self.length * 3.14 *2))

round1 = Ql_Round(3)
round1.ql_Round_Area()
round1.ql_Round_Circum()

4.創(chuàng)建?一個學(xué)?生類:

屬性:姓名，年齡铭段，學(xué)號

方法:答到骤宣，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)?生序愚，刪除學(xué)生憔披，點(diǎn)名, 求班上學(xué)生的平均年齡

class Ql_Student:  # 
    """ 
    類說明文檔:
    """
    def __init__(self, name, age, num):
        """
        函數(shù)說明文檔:
        """
        self.name = name
        self.age = age
        self.num = num

    def ql_Inclass(self):  #
        """
        函數(shù)說明文檔:
        """
        print(self.name, '到！')
 
class Ql_Class:  # 
    """ 
    類說明文檔:
    """
    def __init__(self, stuname = [], classname = '未命名'):
        """
        函數(shù)說明文檔:
        """
        self.stuname = stuname
        self.classname = classname

    def ql_Class_Appendstu(self, x):  #
        """
        函數(shù)說明文檔:
        """
        self.stuname.append(x)
    
    def ql_Class_Delstu(self, x):  #
        """
        函數(shù)說明文檔:
        """
        self.stuname.remove(x)
    
    def ql_Class_Inclass(self, stu):  #
        """
        函數(shù)說明文檔:
        """
        if stu in self.stuname:
            stu.ql_Inclass()
        else:
            print('%s不在教室' % stu.name)
    
    def ql_Class_AverAge(self):  #
        """
        函數(shù)說明文檔:
        """
        sum = 0
        for stu in self.stuname:
            sum += stu.age
        
        print('平均年齡為：%d' % (sum / len(self.stuname)))

stu1 = Ql_Student('xiaoming', 17, '0001')
stu2 = Ql_Student('zhangsan', 18, '0002')
stu3 = Ql_Student('lisi', 15, '0003')
stu4 = Ql_Student('wangwu', 17, '0004')
stu5 = Ql_Student('zhaoliu', 20, '0006')

class1 = Ql_Class([stu1, stu2], '高一1班')
class1.ql_Class_Appendstu(stu3)
class1.ql_Class_Inclass(stu3)
class1.ql_Class_Inclass(stu5)
class1.ql_Class_AverAge()