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[Python-Dev] Not-a-Number

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Taking a step back from all this, why does Python allow
NaNs to arise from computations *at all*?

+Inf and -Inf are arguably useful elements of the algebra,
yet Python insists on raising an exception for 1.0./0.0
instead of returning an infinity.

Why do this but not raise an exception for any operation
that produces a NaN?

-- 
Greg

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