[Python-ideas] Disallow orderring comparison to NaN
Stephen J. Turnbull
stephen at xemacs.org
Sat Apr 30 07:35:32 CEST 2011
Terry Reedy writes:
> On 4/29/2011 6:50 PM, Alexander Belopolsky wrote:
> > realize that Python does have a mechanism that would allow to
> > simultaneously raise an exception and deliver the result. This is
> > what warnings do. Since changing NaN< 0 to raise an error would have
> > to be done by issuing a deprecation warning first, why can't we just
> > issue appropriate warning on invalid operations?
> Adding FloatWarning would probably be easier than changing behavior to
> raise an exception. People who care could change into an exception.
+1 That looks both formally compliant and much better than allowing
what is often a programming error to fail silently.
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