How about adding rational fraction to Python?

[Jeff Schwab]

Paul Rubin wrote:
> "D'Arcy J.M. Cain" <darcy at druid.net> writes:
>>> http://en.wikipedia.org/wiki/Natural_number
>> Recheck the context.  I was talking about the natural result, not
>> natural numbers.
> 
> The natural result of doing arithmetic with natural numbers is more
> natural numbers.  

Back when I was just a wee little developer, I was taught that division 
over the natural number was *not* a closed operation.  (I still like 
integer division, and I'm OK with the fact that it truncates.)