On Mar 11, 1:21 pm, Duncan Booth <[EMAIL PROTECTED]> wrote: > Tim Peters wrote inhttp://blog.gmane.org/gmane.comp.python.devel/day=20050409: > > > All Python behavior in the presence of a NaN, infinity, or signed zero > > is a platform-dependent accident. This is because C89 has no such > > concepts, and Python is written to the C89 standard. It's not easy to > > fix across all platforms (because there is no portable way to do so in > > standard C), although it may be reasonably easy to fix if all anyone > > cares about is gcc and MSVC (every platform C compiler has its own set > > of gimmicks for "dealing with" these things).
Understood. Platform dependent is fine. But does this really excuse results like the following? >>> from math import atan2 >>> x = -0.; print atan2(0., -1.) -3.14159265359 >>> print atan2(0., -1.) 3.14159265359 Mark -- http://mail.python.org/mailman/listinfo/python-list
