On Tue, 2006-10-17 at 09:23 +0200, Edward d Auvergne wrote: > Update of bug #6874 (project relax): > > Status: None => Wont Fix > Assigned to: None => bugman > Open/Closed: Open => Closed > > _______________________________________________________ > > Follow-up Comment #2: > > I've chased this problem down to the MS Windows 2.4.3 version of Python. In > this version, attempting the operation NaN**2 fails with a ValueError. In > the Python 2.4.1 in Linux, NaN**2 = NaN! I'm not sure if this is the Python > version number or the Windows Python version which is problematic. As this > bug should never be encountered by a user (it only occurs when the global > correlation time and internal correlation time are both zero) and will > probably be fixed in future Windows Python versions, I am closing the bug > report. I am not going to attempt a fix for the problem because the problem > lies in the Windows Python executables.
As Python's floating-point behaviour is generaly inherited from the underlying C machinery, this is almost certainly a 'feature' of whatever C compiler was used to build the windows Python version. Don't hold your breath for a fix - the powers that be in the Python world are in no hurry to change this (because building a fast, robust and platform independent fp machinery is a truly massive task, and they have better things to do with their time). I can't see MS being in any rush to change their compiler's behaviour either. I agree though, that this is not a big issue in the current context. If it appears in a more serious context, we will have to catch the situation before the ValueError is thrown in order to at least give the user a meaningful error message. Chris > > _______________________________________________________ > > Reply to this item at: > > <http://gna.org/bugs/?6874> > > _______________________________________________ > Message sent via/by Gna! > http://gna.org/ > > > _______________________________________________ > relax (http://nmr-relax.com) > > This is the relax-devel mailing list > relax-devel@gna.org > > To unsubscribe from this list, get a password > reminder, or change your subscription options, > visit the list information page at > https://mail.gna.org/listinfo/relax-devel > _______________________________________________ relax (http://nmr-relax.com) This is the relax-devel mailing list relax-devel@gna.org To unsubscribe from this list, get a password reminder, or change your subscription options, visit the list information page at https://mail.gna.org/listinfo/relax-devel
