On Thu, May 12, 2011 at 7:40 PM, Ronan Lamy <[email protected]> wrote:
> Le jeudi 12 mai 2011 à 19:22 -0700, Ondrej Certik a écrit :
>> On Thu, May 12, 2011 at 5:28 PM, Ronan Lamy <[email protected]> wrote:
>> > Le jeudi 12 mai 2011 à 16:06 -0700, Ondrej Certik a écrit :
>> >> On Thu, May 12, 2011 at 3:49 PM, Aaron Meurer <[email protected]> wrote:
>> >> > Hi.
>> >> >
>> >> > There was a discussion over at
>> >> > http://code.google.com/p/sympy/issues/detail?id=1721 to rename the
>> >> > Real class to Float, because the name fits the class better. The
>> >> > reasoning is that Real represents floating point numbers, not any real
>> >> > number like sin(1) or 2*pi, and it is confusing to have the subtle
>> >> > difference between Real and real in the docs. See the discussion over
>> >> > at that issue page for more info.
>> >> >
>> >> > How do people feel about this? If it were to happen, it would happen
>> >> > in the next release, which also breaks some other things in terms of
>> >> > backwards compatibly.
>> >>
>> >> It seems that most code uses some variation of Real already:
>> >>
>> >> Sage: uses RealField and RealLiteral:
>> >>
>> >> sage: a = 1.345
>> >> sage: type(a)
>> >> <type 'sage.rings.real_mpfr.RealLiteral'>
>> >>
>> >>
>> >> Mathematica uses "Real":
>> >> http://reference.wolfram.com/mathematica/ref/Real.html
>> >
>> > And their "Possible issues" section can be summed up with "Reals aren't
>> > reals, reals aren't Reals". Do we need to repeat others' mistakes?
>> >
>> > Anyway, both Python and numpy call floats "float" which, I think, trumps
>> > compatibility with Sage and Mathematica. Maple and Maxima use "float" as
>> > well.
>>
>> If Maple + Maxima both use float, I am ok with that. Do you have some
>> reference for that? I didn't manage to find one for Maple.
>
> For Maple:
> http://www.maplesoft.com/support/help/Maple/view.aspx?path=float
>
> For Maxima:
> http://maxima.sourceforge.net/docs/manual/en/maxima_10.html
Thanks. This looks good. I am ok with Float too. If it is not too
hard, we can deprecate Real(), e.g. something like:
class Real(Basic)
def __eval__ /or __new__/ ()
deprecated
return Float(*args)
Ondrej
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