On Sat, 9 Apr 2005, Fredrik Lundh wrote:
> Ka-Ping wrote:
> > counter = Counter()
> > readonly_facet = facet(counter, ['value'])
> >
> > If i've done this correctly, it should be impossible to alter the
> > contents of the list or the counter, given only the immutable_facet
> > or the readonly_facet, after restrict() has been called.
>
> I'm probably missing something, but a straightforward reflection
> approach seems to work on my machine:
That's funny. After i called restrict() Python didn't let me get im_self.
>>> restrict()
>>> readonly_facet.value
<bound method Counter.value of <__main__.Counter instance at 0x41df0>>
>>> readonly_facet.value.im_self
Traceback (most recent call last):
File "<stdin>", line 1, in ?
RuntimeError: restricted attribute
>>>
It doesn't matter if i make the facet before or after restrict().
>>> restrict()
>>> rf2 = facet(counter, ['value'])
>>> rf2.value
<bound method Counter.value of <__main__.Counter instance at 0x41df0>>
>>> rf2.value.im_self
Traceback (most recent call last):
File "<stdin>", line 1, in ?
RuntimeError: restricted attribute
>>>
I'm using
Python 2.3 (#1, Sep 13 2003, 00:49:11)
[GCC 3.3 20030304 (Apple Computer, Inc. build 1495)] on darwin
-- ?!ng
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