numpy: handling float('NaN') different in XP vs. Linux
Christian Heimes
lists at cheimes.de
Sat Jun 14 09:32:20 EDT 2008
John [H2O] wrote:
> I have a script:
>
> from numpy import float
> OutD=[]
> v=['3','43','23.4','NaN','43']
> OutD.append([float(i) for i in v[1]])
>
>
> On linux:
> Python 2.5.1 (r251:54863, Mar 7 2008, 04:10:12)
> [GCC 4.1.3 20070929 (prerelease) (Ubuntu 4.1.2-16ubuntu2)] on linux2
> [john at andLinux analysis]$ python jnk.py
> [[3.0, 43.0, 23.399999999999999, nan, 43.0]]
>
> On XP:
> Python 2.5 (r25:51908, Mar 9 2007, 17:40:28) [MSC v.1310 32 bit (Intel)]
> Microsoft Windows XP [Version 5.1.2600]
> (C) Copyright 1985-2001 Microsoft Corp.
>
> C:\analysis>C:\Python25\python.exe jnk.py
> Traceback (most recent call last):
> File "jnk.py", line 4, in <module>
> OutD.append([float(i) for i in v])
> ValueError: invalid literal for float(): NaN
I've fixed the issue for Python 2.6 and 3.0 a while ago. Mark and I have
spent a lot of time on fixing several edge cases regarding inf, nan and
numerical unsound functions in Python's math und cmath module.
Christian
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