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Thu Apr 28 00:32:55 CEST 2011 · https://mail.python.org/pipermail/python-dev/2011-April/110971.html

Guido van Rossum wrote:

> Maybe we should just call off the odd NaN comparison behavior?

That's probably as good an idea as anything.

The weirdness of NaNs is supposed to ensure that they
propagate through a computation as a kind of exception
signal. But to make that work properly, comparing two
NaNs should really give you a NaB (Not a Boolean). As
long as we're not doing that, we might as well treat
NaNs sanely as Python objects.

-- 
Greg

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[Python-Dev] PyObject_RichCompareBool identity shortcut