class Room:
    tag=1
    def __init__(self,name,owner,width,length,heigh):
        self.name=name
        self.owner=owner
        self.width=width
        self.length=length
        self.heigh=heigh

    @property
    def cal_area(self):
        # print(‘%s 住的 %s 总面积是%s‘ % (self.owner,self.name, self.width * self.length))
        return  self.width * self.length
r1=Room(‘厕所‘,‘alex‘,100,100,100000)
print(r1.cal_area)

class Room:
    tag=1
    def __init__(self,name,owner,width,length,heigh):
        self.name=name
        self.owner=owner
        self.width=width
        self.length=length
        self.heigh=heigh

    @classmethod
    def tell_info(cls,x):
        print(cls)
        print(‘-->‘,cls.tag,x)

r1=Room(‘厕所‘,‘alex‘,100,100,100000)
Room.tell_info(10)

#输出:
<class ‘__main__.Room‘>
--> 1 10

class Room:
    tag=1
    def __init__(self,name,owner,width,length,heigh):
        self.name=name
        self.owner=owner
        self.width=width
        self.length=length
        self.heigh=heigh

    @staticmethod
    def wash_body(a,b,c):
        print(‘%s %s %s正在洗澡‘ %(a,b,c))

Room.wash_body(‘alex‘,‘yuanhao‘,‘wupeiqi‘)
print(Room.__dict__)
r1=Room(‘厕所‘,‘alex‘,100,100,100000)
print(r1.__dict__)
r1.wash_body(‘alex‘,‘yuanhao‘,‘wupeiqi‘)

#输出:
alex yuanhao wupeiqi正在洗澡
{ ‘wash_body‘: <staticmethod object at 0x000000000261B438>, ..... }
{‘name‘: ‘厕所‘, ‘owner‘: ‘alex‘, ‘width‘: 100, ‘length‘: 100, ‘heigh‘: 100000}
alex yuanhao wupeiqi正在洗澡

class Date:
    def __init__(self,year,month,day):
        self.year=year
        self.month=month
        self.day=day
    @staticmethod
    def now(): #用Date.now()的形式去产生实例,该实例用的是当前时间
        t=time.localtime() #获取结构化的时间格式
        return Date(t.tm_year,t.tm_mon,t.tm_mday) #新建实例并且返回
    @staticmethod
    def tomorrow():#用Date.tomorrow()的形式去产生实例,该实例用的是明天的时间
        t=time.localtime(time.time()+86400)
        return Date(t.tm_year,t.tm_mon,t.tm_mday)

a=Date(‘1987‘,11,27) #自己定义时间
b=Date.now() #采用当前时间
c=Date.tomorrow() #采用明天的时间

print(a.year,a.month,a.day)
print(b.year,b.month,b.day)
print(c.year,c.month,c.day)

class Trunk:
    pass

class Head:
    pass

class Person:
    def __init__(self,id_num,name):
        self.id_num=id_num
        self.name=name
        self.trunk=Trunk()
        self.head=Head()
p1=Person(‘111111‘,‘alex‘)
print(p1.name)
print(p1.id_num)
print(p1.__dict__)

#输出:
alex
111111
{‘id_num‘: ‘111111‘, ‘name‘: ‘alex‘, ‘trunk‘: <__main__.Trunk object at 0x000000000290B358>, ‘head‘: <__main__.Head object at 0x000000000290B390>}

class School:
    def __init__(self,name,addr):
        self.name=name
        self.addr=addr

    def zhao_sheng(self):
        print(‘%s 正在招生‘ %self.name)

class Course:
    def __init__(self,name,price,period,school):
        self.name=name
        self.price=price
        self.period=period
        self.school=school

s1=School(‘oldboy‘,‘北京‘)
s2=School(‘oldboy‘,‘南京‘)
s3=School(‘oldboy‘,‘东京‘)

c1=Course(‘linux‘,10,‘1h‘,‘oldboy 北京‘)
c2=Course(‘linux‘,10,‘1h‘,s1)

class Grandfather:
    pass

class Father(Grandfather): #单继承 Father是派生类，grandfather 是基类
    pass

class son(Father,Grandfather): #多继承
    pass