Python Learning Path: Staticmethod Classmethod Property method

Reference Link: http://www.cnblogs.com/alex3714/articles/5213184.html

Static methods

Only nominal collation management, in fact, no property in the class or instance can be accessed in a static method

Class Dog (object):    def __init__ (self,name):        self.name = name    @staticmethod #实际上跟类没什么关系了    def eat (self ):        print ("%s is eating%s"% (Self.name, ' DD '))    def talk (self):        print ("%s is talking"%self.name) d = Dog (" Chenrh ") d.eat (d) d.talk ()

class Method:

Only class variables can be accessed and instance variables cannot be accessed

Class Dog (object):    #n = 3333    name = "Huazai"    def __init__ (self,name):        self.name = name    #@ Staticmethod #实际上跟类没什么关系了    @classmethod    def Eat (self):        print ("%s is eating%s"% (Self.name, ' DD ')    def Talk (self):        print ("%s is talking"%self.name) d = Dog ("Chenrh") D.eat () D.talk ()

Property Method:

Turn a method into a static property

Class Dog (object):    #n = 3333    name = "Huazai"    def __init__ (self,name):        self.name = name    #@ Staticmethod #实际上跟类没什么关系了    # @classmethod    @property #attribute    def Eat (self):        print ('%s is eating%s ' % (Self.name, ' DD '))    # def talk (self):    #     Print ("%s is talking"%self.name) d = Dog ("Chenrh") d.eat

Class Dog (object):    #n = 3333    name = "Huazai"    def __init__ (self,name):        self.name = name        Self.__food =none    # @staticmethod # #实际上跟类没什么关系了    # @classmethod    @property #attribute, turn a method into a property    def eat (self):        Print ("%s is eating%s"% (Self.name,self.__food))    @eat. setter# Modify Properties    def eat (Self,food):        print ("Set to food:", food)        Self.__food = Food    @eat. deleter #删除私有属性    def Eat (self):        del self.__food        print ("erased")    # def talk (self):    #     print ('%s ' is Talking "%self.name) d = Dog (" Chenrh ") d.eatd.eat =" Baozi "del d.eat

Examples of scenarios where static property methods apply:

You want to know the current status of a flight, is arrived, delayed, canceled, or has flown away, want to know this state you have to go through the following steps:

1. Connecting Airlines API Query

2. Parsing the query results

3. Return the results to your users

So the value of this status property is the result of a series of actions, so every time you call, it is actually going through a series of actions to return your results, but these action procedures do not require user care, the user only need to call this property can, understand?

Class Flight (object): Def __init__ (self,name): self.flight_name = name def checking_status (self): Prin  T ("Checking flight%s status"% Self.flight_name) return 1 @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 Flig Ht_status (self,status): Status_dic = {0: "Canceled", 1: "Arrived", 2: "Departur Ed "} 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_statusf.flight_s Tatus = 2 #触发 @flight_stAtus.setterdel f.flight_status #触发 @flight_status. deleter  

Python Learning Path: Staticmethod Classmethod Property method