day_25 面向对象

Posted 2020-11-08 augustyang

"""
特性 　　property
类方法   classmethed
静态方法 staticmethed
"""

property

封装逻辑，让调用者感受不到逻辑

class Room(object):
    #property    特性
    def __init__(self,name,owner,width,length,heigh):
        self.name = name
        self.owner=owner
        self.width = width
        self.length = length
        self.heigh = heigh

    def cal_area(self):
        print(self.width*self.length)

    @property
    def cal_areaw(self):
        return self.width*self.length


n1 = Room(‘yy‘,‘wc‘,10,10,10)

n1.cal_area()
print (n1.cal_areaw)  #100
print(n1.name)        #yy

classmethed

class Room(object):
    #类方法
    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

    def cal_area(self):
        print(self.width*self.length)

    @classmethod
    def tell_info(cls):             #cls 是   类名
        print(cls)
        print(cls.tag)


# n1 = Room(‘yy‘,‘wc‘,10,10,10)
Room.tell_info()
# 结果
#  <class ‘__main__.Room‘>
#  1