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Fri Apr 29 04:56:47 CEST 2011 · https://mail.python.org/pipermail/python-dev/2011-April/111100.html

On 4/28/11 8:44 PM, Steven D'Aprano wrote:
> Greg Ewing wrote:
>> Taking a step back from all this, why does Python allow
>> NaNs to arise from computations *at all*?
>
> The real question should be, why does Python treat all NANs as signalling NANs
> instead of quiet NANs? I don't believe this helps anyone.

Actually, Python treats all NaNs as quiet NaNs and never signalling NaNs.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco

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[Python-Dev] Not-a-Number