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From: Marko Rauhamaa <marko@pacujo.net>
Newsgroups: comp.lang.python
Subject: Re: NaN comparisons - Call For Anecdotes
Date: Tue, 08 Jul 2014 20:31:25 +0300
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Chris Angelico <rosuav@gmail.com>:

> I'd say it would surprise people rather a lot if operations like dict
> insertion/lookup could trigger arithmetic exceptions. :)

That wouldn't trigger exceptions.

Dict operations do an "is" test before an "==" test. In fact, you
couldn't even use NaN as a dict key otherwise. Thus, dict operations
never test NaN == NaN.


Marko