class Luffy:
    school = 'luffy'
    #print('老王呀！')
    def __init__(self, name, age, sex):#self== Luffy.__init__('王二丫', '20', '女')，，，self相當於類的例項化的物件本身。位置引數依次是stu1，‘王二丫’，‘20’，‘nv’
 self.Name = name
 self.Age = age
 self.Sex = sex
 def lear(self):
 print('學學學')
 def eat(self):
 print('吃吃吃')
 def sleep(self):
 print('睡睡睡')
stu1 = Luffy('王二丫', '20', '女')
#修改
stu1.Name = '李二丫'
print(stu1.__dict__)
#刪除
del stu1.Name
print(stu1.__dict__)
#增加
stu1.class_name = 'python全棧開發'
print(stu1.__dict__)
#查詢
print(stu1.Age)


stu2 = Luffy('老王', '23', '男') #類可以多次例項化物件
print(stu2.__dict__)