boolean xor

[ndev42 at yahoo.com]

> I need a boolean (not bit-wise) xor function.  I've got the following
> function, but my logic skills are rusty enough that I'm wondering if
> this is the "right" way to do it (I've validated that it produces the
> correct outputs, at least):
>
> def xor(a,b):
>     return not ( (a and b) or (not (a or b)) )

A boolean xor is a detector of differences. Knowing that, you can
simply write:

def xor(a,b):
	return not(a==b)

Hope it helps,
--
Nicolas


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