David M. Cooke cookedm+news at physics.mcmaster.ca
Wed Nov 17 18:53:45 EST 2004

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Gandalf <gandalf at geochemsource.com> writes:

>> Just try it. 1./0. raises a ZeroDivisionError, math.log(0) raises a
>> math range error, and math.log(-1) yields nan.
>
> This is not true. On UNIX systems, math.log(-1) will be NaN.

Not true; all the linux boxes and a Tru64 system I've just tried raise
ValueError. However, the three versions of Python I have on my Mac OS X
system give nan.

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|David M. Cooke
|cookedm(at)physics(dot)mcmaster(dot)ca

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