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Thu Mar 25 12:25:35 CET 2010 · https://mail.python.org/pipermail/python-dev/2010-March/098873.html

Steven D'Aprano wrote:
> I'd like to turn the question around ... what algorithms are there that 
> rely on NaN == NaN being True?

Absolutely anything that expects "x is y" to imply that "x == y". The
builtin containers enforce this by checking identity before they check
equality, but there are plenty of algorithms that won't.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia
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[Python-Dev] Mixing float and Decimal -- thread reboot