On Sat, Dec 28, 2019 at 11:58:35PM -0800, Andrew Barnert via Python-ideas wrote:
> No it won’t, unless you assume here that no possible non-numeric types
> could ever have non-self-equal values. Which isn’t true.
Reflexivity of equality (namely, that any value should be equal to
itself) is such a fundamental property that I would assume that NANs are
the only exception, until such time as somebody points out an
uncontrived real-world example.
A bigger concern is the question of what should isnan do for non-numeric
types?
isnan(None)
# raise or return False?
Clearly None is not a NAN, so it shouldn't return True. Should it return
False because its not a NAN, or raise because it's not a numeric type at
all?
--
Steven
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