[Python-Dev] Why is nan != nan?

[Jesus Cea]

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On 03/26/2010 01:57 AM, Steven D'Aprano wrote:

> In fact, identity of NANs is itself an implementation quirk of 
> programming languages like Python: logically, NANs don't have identity 
> at all.
> 
> To put it another way: all ONEs are the same ONE, even if they come from 
> different sources, are in different memory locations, or have different 
> identities; but all NANs are different, even if they come from the same 
> source, are in the same memory location, or have the same identity.

+inf. Bravo!.

:-)

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