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

[Nick Coghlan]

On Tue, Aug 24, 2010 at 8:25 AM, Benjamin Peterson <benjamin at python.org> wrote:
> 2010/8/23 Yury Selivanov <yselivanov at gmail.com>:
>> So, the proposed magic method is not intended to change the protocol,
>> but to complement and enhance it.
>
> But it still raises the potential to break the relationship between
> hasattr and getattr.
>
> I think this should require a PEP.

Definitely needs a PEP, and will require some solid use cases to
explain why allowing optimisation of hasattr() is the right way to go.
Complexity isn't free, and I doubt the gains here will justify the
costs, but that's one of the things the PEP process is intended to
figure out.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia