On Thu, May 12, 2011 at 5:50 PM, Ronan Lamy <ronan.l...@gmail.com> wrote:
> Le jeudi 12 mai 2011 à 16:41 -0600, Aaron Meurer a écrit :
>> Would it require the ast module? That is only available on 2.6+. But
>> that's better than nothing. 1/2 vs. S(1)/2 is by far the number one
>> gotcha that I see.
>
> That's really the only thing that prevents us from using a standard
> Python shell. I wish Python did the right thing and returned
> fractions.Fraction(1, 2) for 1/2... Since that's not the case, the next
> easiest option is to wrap all integer literals with Integer() - which
> shouldn't be hard in ipython, I hope.
>
Oh, yeah, that would do it. We should be able to do that with a
simple regex replacement, no advanced parsing like ast needed.
We could also wrap float literals with Real(" "), so that you
automatically get lossless arbitrary precision floats.
Actually, now that I think about it, it isn't so simple as regex,
because you don't want to do it with literals that are in strings. So
probably the best way is to use an actual parser.
Aaron Meurer
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