don't NaN & infinities hide FP errors

[Batista, Facundo]

[kartick_vaddadi at yahoo.com]

#- Since Python floats are implemented using C doubles, 
#- assuming IEEE 754
#- compliance, certain operations should result in NaN or 
#- infinity. Don't
#- such special values hide errors? Would we want our variables to be in
#- such states? I feel it would be better if a floating point 
#- division by
#- zero (or other actions that produce NaNs or infinities) throws an
#- exception, just like an integer divide by zero.

Check Decimal FP, where you can control through the context, for example, if
0/0 returns NaN or throws an exception.

http://www.python.org/dev/doc/devel/lib/module-decimal.html

.	Facundo
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