On Tue, Mar 23, 2010 at 10:55 AM, Mark Dickinson <dicki...@gmail.com> wrote:
> On Tue, Mar 23, 2010 at 6:07 PM, Adam Olsen <rha...@gmail.com> wrote:
>> On Tue, Mar 23, 2010 at 12:04, Mark Dickinson <dicki...@gmail.com> wrote:
>>> Note that containment tests check identity before equality, so there's
>>> no problem with putting (float) nans in sets or dicts:
>>>
>>>>>> x = float('nan')
>>>>>> s = {x}
>>>>>> x in s
>>> True
>>
>> Ergh, I thought that got changed. Nevermind then.
>
> Hmm. I think you're right: it did get changed at some point early in
> py3k's history; I seem to recall that the identity-checking behaviour
> got restored before 3.1 was released, though. There was an issue
> about this somewhere, but I'm failing to find it.
Raymond and I don't see this the same way. It looks like he won. :-)
--
--Guido van Rossum (python.org/~guido)
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