On Thu, May 12, 2011 at 19:40, Aaron Meurer <asmeu...@gmail.com> wrote: > 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.
You could use the tokenize module. I'm not sure if that's available on the App Engine, but it probably is. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco -- You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to sympy@googlegroups.com. To unsubscribe from this group, send email to sympy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sympy?hl=en.