Surprise with special floating point values

prouleau001 at gmail.com prouleau001 at gmail.com
Wed Nov 29 19:02:09 CET 2006



On Nov 29, 12:53 pm, prouleau... at gmail.com wrote:
> Hi all,
>
> While trying to use simplejson under Python 2.4.3 I have been
> investigating the handling of special floating point values and found
> that both Python 2.4 and 2.5 return False when comparing  a NaN with
> itself.   Although surprising, I imagine it could also be correct since
> NaN is not a number.  But is it correct?

And of course it is correct... As NaN does not compare with itself in
floating point:  http://en.wikipedia.org/wiki/NaN

Should have read it earlier...


> --
> Pierre Rouleau




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