[issue4296] Python assumes identity implies equivalence; contradicts NaN
Mark Dickinson
report at bugs.python.org
Tue Nov 11 17:44:54 CET 2008
Mark Dickinson <dickinsm at gmail.com> added the comment:
[Michael]
> the real issue that caused problems [...] was Python deciding to
> silently cast NaN falues to 0L
> [...]
> it sounds like there is no intention to fix this for versions prior
> to 3.0,
Oh, <rude words> <rude words> <more rude words>! Guido's message does
indeed say that that behaviour shouldn't be changed before 3.0. And
if I'd managed to notice his message, I wouldn't have 'fixed' it for
2.6.
Python 2.7a0 (trunk:67115, Nov 6 2008, 08:37:21)
[GCC 4.0.1 (Apple Inc. build 5488)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> int(float('nan'))
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ValueError: cannot convert float NaN to integer
:-(.
[Imagine me looking extreeemely sheepish.]
I guess I owe apologies to Christian and Guido here. Sorry, folks. Is
there any way I can make amends?
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<http://bugs.python.org/issue4296>
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