New submission from Hrvoje Abraham:
repr of -nan value should contain the sign so the round-trip could be assured.
NaN value sign (bit) could be seen as not relevant or even uninterpretable
information, but it is actually used in real-life situations, the fact
substantiated by section 6.3 of IEEE-754 2008 standard.
>>> from math import copysign
>>> x = float("-nan")
>>> copysign(1.0, x)
-1.0
This is correct. Also proves the value contains the sign information.
>>> repr(x)
nan
Not correct. Should be '-nan'.
----------
components: Interpreter Core
messages: 263576
nosy: ahrvoje
priority: normal
severity: normal
status: open
title: repr of -nan value should contain the sign
type: behavior
versions: Python 2.7, Python 3.2, Python 3.3, Python 3.4, Python 3.5, Python 3.6
_______________________________________
Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue26785>
_______________________________________
_______________________________________________
Python-bugs-list mailing list
Unsubscribe:
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
