Python继承 - 如何禁用函数 [英] Python inheritance - how to disable a function

问题描述

在C ++中，您可以通过在子类中将其声明为私有来禁用父类中的函数。如何在Python中完成？ I.E.如何从子公共接口隐藏父级函数？

In C++ you can disable a function in parent's class by declaring it as private in the child class. How can this be done in Python? I.E. How can I hide parent's function from child's public interface?

推荐答案

确实没有任何真正的私有属性或方法蟒蛇。您可以做的一件事就是简单地覆盖子类中不需要的方法，并引发异常：

There really aren't any true "private" attributes or methods in Python. One thing you can do is simply override the method you don't want in the subclass, and raise an exception:

>>> class Foo( object ):
...     def foo( self ):
...         print 'FOO!'
...         
>>> class Bar( Foo ):
...     def foo( self ):
...         raise AttributeError( "'Bar' object has no attribute 'foo'" )
...     
>>> b = Bar()
>>> b.foo()
Traceback (most recent call last):
  File "<interactive input>", line 1, in <module>
  File "<interactive input>", line 3, in foo
AttributeError: 'Bar' object has no attribute 'foo'

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