[Python-Dev] Intricacies of calling __eq__

[Antoine Pitrou]

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.