Christian Heimes added the comment: Guido van Rossum wrote: > Hm, OK, but then passing a zero of some other type (e.g. int) should > also return +1 as the sign. I also think the function's name should be > changed, because I (and I assume many others) have grown up with a > sign() function that essentially returns cmp(x, 0.0). > > Perhaps it would be better to have a function math.isneg() that > returns True for -0.0 and anything smaller and False for +0.0 and > anything larger. It could also return the proper sign of a nan.
I'm fine with a isneg() function but I wouldn't "fix" it for NaN. It has probably some kind of obscure meaning. The best explanation I was able to find, is http://www.cisl.ucar.edu/docs/trap.error/errortypes.html "Note: Since NaN is "not a number," there really isn't a "+" or "-" sign associated with it." Christian __________________________________ Tracker <[EMAIL PROTECTED]> <http://bugs.python.org/issue1640> __________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
