On 27.08.2021 09:58, Serhiy Storchaka wrote:
> 26.08.21 12:05, Marc-Andre Lemburg пише:
>> Oh, good point. I was under the impression that NAN is handled
>> as a singleton.
>>
>> Perhaps this should be changed to make to make it easier to
>> detect NANs ?!
>
> Even ignoring a NaN payload, there are many different NaNs of different
> types. For example, Decimal('nan') cannot be the same as float('nan').
Right, it's a much larger problem than I thought :-)
cmath has its own NANs as well.
Too many NANs... it's probably better to stick with NumPy for handling
data sets with embedded NANs. It provides consistent handling for NANs
across integers, floats, complex and even date/time values (as NATs).
--
Marc-Andre Lemburg
eGenix.com
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