In article <87mwh9969m....@elektro.pacujo.net>,
Marko Rauhamaa <ma...@pacujo.net> wrote:
> Michael Torrie <torr...@gmail.com>:
>
> > No, '==' works fine no matter what objects you assign to your state
> > variables.
>
> Well, it doesn't since
>
> >>> a = float("nan")
> >>> a is a
> True
> >>> a == a
> False
>
> More generally, it depends on how the __eq__ method has been implemented
> for the class. You might even (foolishly) define a class such that:
>
> >>> a == b
> False
> >>> a != b
> False
Well, there's always things like SQL's NULL, which is both not equal and
not not equal to itself.
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