Am 13.07.2014 22:05, schrieb Akira Li:
Nick Coghlan <ncogh...@gmail.com> writes:
...
definition of floats and the definition of container invariants like
"assert x in [x]")
The current approach means that the lack of reflexivity of NaN's stays
confined to floats and similar types - it doesn't leak out and infect
the behaviour of the container types.
What we've never figured out is a good place to *document* it. I
thought there was an open bug for that, but I can't find it right now.
There was related issue "Tuple comparisons with NaNs are broken"
http://bugs.python.org/issue21873
but it was closed as "not a bug" despite the corresponding behavior is
*not documented* anywhere.
I currently know about these two issues related to fixing the docs:
http://bugs.python.org/11945 - about NaN values in containers
http://bugs.python.org/12067 - comparisons
I am working on the latter, currently. The patch only targets the
comparisons chapter in the Language Reference, there is another
comparisons chapter in the Library Reference, and one in the Tutorial.
I will need to update the patch to issue 12067 as a result of this
discussion.
Andy
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