python-类的特殊成员

 

一、成员修饰符

    共有成员
    私有成员
    
    class Foo:
        def __init__(self,name):
            self.name = name
            #self.age = age
            self.__age = age  #私有,外部无法访问
     def show(self):
        return self.__age
obj
= Foo('zichuan',21) print(obj.name) #obj.age print(obj.__age) #私有的
-----------------------------------------------------
class Foo:
  v = '123'
  def __init__(self):
    pass
  def show(self):
    return Foo.__v
  @staticmethod  #静态方法
  def stat(self):
    return Foo.__v
#print(Foo.__v)
#ret = Foo().show()
#print(ret)

ret = Foo.stat()
print(ret)
------------------------------------------

class Foo:
  def __fl(self):
    return 123
  def f2(self):
    r = self.__f1()
    return r
obj = Foo()
ret = obj.f2()
print(ret)
----------------------------------------------
class F:
  def __init__(self):
    self.ge = 123
    seld.__game = 123

class s(F):
  def __init__(self,name):
    self.name = name
    self.__age = 21
     super(s,self).__init__()
  def show(self):
    print(self.name)
    print(self.__age)
    print(self.ge)
    #print(self.__game)
s = s('zichuan')
s.show()

 

二、特殊成员

class Foo:
    def __init__(self):
        print('init')
    
    def __call__(self,'args,**kwargs):
       print('call') 
    
obj = Foo()
obj()
#Foo()()

-------------------------------------------

 

三、metaclass,类的起始  

a.python中一起事物都是对象
b.
    class Foo:
        pass

    obj = Foo()
    #obj是对象,Foo类
    #Foo类也是一个对象,type的对象

 

posted @ 2019-07-28 19:09  MTcx  阅读(170)  评论(0编辑  收藏  举报