[Python-Dev] 'hasattr' is broken by design

[Benjamin Peterson]

2010/8/23 Guido van Rossum <guido at python.org>:
> On Mon, Aug 23, 2010 at 7:46 AM, Benjamin Peterson <benjamin at python.org> wrote:
>> 2010/8/23 Yury Selivanov <yselivanov at gmail.com>:
>>> 1) I propose to change 'hasattr' behaviour in Python 3, making it to swallow only AttributeError exceptions (exactly like 'getattr').  Probably, Python 3.2 release is our last chance.
>>
>> I would be in support of that.
>
> I am cautiously in favor. The existing behavior is definitely a
> mistake and a trap. But it has been depended on for almost 20 years
> now.
>
> I recommend that you create a patch, apply it, run the *entire* stdlib
> test suite and see how much breaks. That will give you an idea of the
> damage to expect for 3rd party code.

The test suite passes complete without modification for me.



-- 
Regards,
Benjamin