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[Python-Dev] Intricacies of calling __eq__

Maciej Fijalkowski fijall at gmail.com
Wed Mar 19 14:21:16 CET 2014 
On Wed, Mar 19, 2014 at 3:17 PM, Antoine Pitrou <solipsis at pitrou.net> wrote:
> On Wed, 19 Mar 2014 15:09:04 +0200
> Maciej Fijalkowski <fijall at gmail.com> wrote:
>>
>> I would like to point out that instructing people does not really
>> work. Besides, other examples like this:
>>
>> if d[x] >= 3:
>>    d[x] += 1 don't really work.
>
> That's a good point. But then, perhaps PyPy should analyze the __eq__
> method and decide whether it's likely to have side effects or not (the
> answer can be hard-coded for built-in types such as str).
>
> Regards
>
> Antoine.

Ok. But then how is it valid to have "is" fast-path?
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