在Python中确实没有任何真正的“私有”属性或方法。您可以做的一件事就是简单地覆盖子类中不需要的方法，并引发一个异常：
>>> 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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