#静态方法用的少，相当于类的工具包,访问不了类或实例中的任何属性
classDog(object):
   def__init__(self,name):
       self.name=name


   @staticmethod#实际上跟类没关系了，就只是一个函数了,名义上归类管
   defeat(self):
       print("%s is eating %s"%(self.name,'dd'))

   deftalk(self):
       print("%s is talking"%self.name)
d=Dog("chenronghua")
d.eat(d)#把自己传到eat函数，使self有效
d.talk()

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#类方法基本用不到
class Dog(object):
    name="huazai"
    def __init__(self,name):
        self.name=name
        self.n=2222

    @classmethod #类方法只能访问类变量，不能访问实例变量
    def eat(self):
        print("%s is eating %s"%(self.name,'dd'))

    def talk(self):
        print("%s is talking"%self.name)

d=Dog("chenronghua")
d.eat()
d.talk()

#属性方法

class   Dog(object):
    def__init__(self,name):
        self.name=name

    @property
    defeat(self):
        print("%s is eating %s"%(self.name,'dd'))
    @eat.setter
    defeat(self,food):
        print("set to food:",food)

d=Dog("chenronghua")
d.eat            # @property下面的eat
d.eat="baozi"# @eat.setter 传入food

--————————————————————————————————————————
class   Dog(object):
    def__init__(self,name):
        self.name=name
        self.__food=None#空变量

    @property   #方法转属性(函数转变量)
    defeat(self):
        print("%s is eating %s"%(self.name,self.__food))#先传一个空变量 self.__food
    @eat.setter   #修改 修改food值
    defeat(self,food):  #修改 修改food值
        print("set to food:",food)
        self.__food=food#将food传入 空变量
    @eat.deleter#删除
    defeat(self):
        delself.__food
        print("删完了")

d=Dog("chenronghua")
d.eat            # @property下面的eat
d.eat="baozi"# @eat.setter 传入food
d.eat           #  "baozi"传入self.__food,@property下面的 food是"baozi"

deld.eat  # @eat,deleter 删除eat函数  del self.__food删除self.__food变量

d.eat   #依然调用@property下的eat 提示删除了Dog.__food变量 即self.__food
    # @property
    #def eat(self):
     #   print("%s is eating %s"%(self.name,self.__food))

 

#属性方法实例

classFlight(object):
   def__init__(self, name):
       self.flight_name = name

   defchecking_status(self):
       print("checking flight %s status "%self.flight_name)
       return2

   @property #航班状态方法转变成属性方法
   defflight_status(self):   
        status =self.checking_status()
       ifstatus ==0:
           print("flight got canceled...")
       elifstatus ==1:
           print("flight is arrived...")
       elifstatus ==2:
           print("flight has departured already...")
       else:
           print("cannot confirm the flight status...,please check later")

    @flight_status.setter #修改航班状态
   defflight_status(self, status):
       print("flight %s has changed the flight status to %s"%(self.flight_name,status))

    @flight_status.deleter #删除航班状态
   defflight_status(self):
       print("status got removed...")


f = Flight("CA980")
f.flight_status
f.flight_status =2 #触发@flight_status.setter
#del f.flight_status  #触发@flight_status.deleter

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