Comment #33 on issue 1778 by smichr: Rational from string can be improved
http://code.google.com/p/sympy/issues/detail?id=1778
comment 31a: done
comment 31b, 32a: what about this:
nsimplify(expr, rational=True) => calls rsimplify to be named
_real_to_rational
sympify(expr, rational=True) => does the replacement of any numbers with
rationals
32b: That's fine as long as we keep it to a fraction literal. Do you want
the
limit_denominator option, too? i.e. Rational('3.1415',
limit_denominator=10) -> 22/7
32c: I'll take the others out.
32c: I was thinking about giving sympify a plugin option: S(expr,
plugin=myfunc)
where one could provide their own preprocessing function. The default would
be all
the preprocessing code that is presently in sympify. Any thoughts on this?
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