On 2006-05-05, Ivan Vinogradov <[EMAIL PROTECTED]> wrote: > >> <snip> >> NaNs are handled. > > Throwing an exception would be nice in regular Python (non-scipy).
That would break most of my Python programs (at least most of the ones in which I do floating point). My main problem with NaNs (and Infs) is that there isn't a string represention that is consistent across platforms. > This works to catch NaN on OSX and Linux: > > # assuming x is a number > if x+1==x or x!=x: > #x is NaN > > But is expensive as a precautionary measure. Assert can be > used for testing, if production code can be run with -0 or > -OO. There are those of us that need NaNs in production code, so it would have to be something that could be configured. I find that in my programs the places where I need to do something "exceptional" with a NaN are very limited. The vast majority of the time, I need them to propagate quietly. -- Grant Edwards grante Yow! Thousands of days of at civilians... have produced visi.com a... feeling for the aesthetic modules -- -- http://mail.python.org/mailman/listinfo/python-list