[Python-Dev] PyObject_RichCompareBool identity shortcut

[Isaac Morland]

On Wed, 27 Apr 2011, Alexander Belopolsky wrote:

> High performance applications that rely on non-reflexivity will still
> have an option of using ctypes.c_float type or NumPy.

Python could also provide IEEE-754 equality as a function (perhaps in 
"math"), something like:

def ieee_equal (a, b):
 	return a == b and not isnan (a) and not isnan (b)

Of course, the definition of math.isnan cannot then be by checking its 
argument by comparison with itself - it would have to check the 
appropriate bits of the float representation.

Isaac Morland			CSCF Web Guru
DC 2554C, x36650		WWW Software Specialist