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Wed Apr 27 18:05:12 CEST 2011 · https://mail.python.org/pipermail/python-dev/2011-April/110955.html

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

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