静态方法，类方法，属性方法，属性方法实例

#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
 class Dog(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
     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) #把自己传到eat函数，使self有效
 d.talk()

 

#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
        self.__food=None


    @property #把一个方法变成静态属性(变量）
    def eat(self):
        print("%s is eating %s"%(self.name,self.__food))
    @eat.setter
    def eat(self,food):
        print("set to food:",food)
        self.__food=food
    @eat.deleter #删除属性方法
    def eat(self):
        del self.__food
        print("删完了")

    def talk(self):
        print("%s is talking"%self.name)
d=Dog("chenronghua")
d.eat #属性方法调用,不需要括号
d.eat="baozi"
d.eat

del d.eat #删除属性方法

#属性方法实例

class Flight(object):
     def __init__(self, name):
         self.flight_name = name
 
     def checking_status(self):
         print("checking flight %s status " % self.flight_name)
         return 2
 
     @property
     def flight_status(self):
         status = self.checking_status()
         if status == 0:
             print("flight got canceled...")
         elif status == 1:
             print("flight is arrived...")
         elif status == 2:
             print("flight has departured already...")
         else:
             print("cannot confirm the flight status...,please check later")
 
     @flight_status.setter  # 修改
     def flight_status(self, status):
         status_dic = {
             0: "canceled",
             1: "arrived",
             2: "departured"
         }
         print("\033[31;1mHas changed the flight status to \033[0m", status_dic.get(status))
 
     @flight_status.deleter  # 删除
     def flight_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