OK, please make it so. On Tue, Mar 13, 2018 at 11:39 AM, Raymond Hettinger < raymond.hettin...@gmail.com> wrote:
> > > > On Mar 13, 2018, at 10:43 AM, Guido van Rossum <gu...@python.org> wrote: > > > > So let's make as_integer_ratio() the standard protocol for "how to make > a Fraction out of a number that doesn't implement numbers.Rational". We > already have two examples of this (float and Decimal) and perhaps numpy or > the sometimes proposed fixed-width decimal type can benefit from it too. If > this means we should add it to int, that's fine with me. > > I would like that outcome. > > The signature x.as_integer_ratio() -> (int, int) is pleasant to work > with. The output is easy to explain, and the denominator isn't tied to > powers of two or ten. Since Python ints are exact and unbounded, there > isn't worry about range or rounding issues. > > In contrast, math.frexp(float) ->(float, int) is a bit of pain because it > still leaves you in the domain of floats rather than letting you decompose > to more more basic types. It's nice to have a way to move down the chain > from ℚ, ℝ, or ℂ to the more basic ℤ (of course, that only works because > floats and complex are implemented in a way that precludes exact > irrationals). > > > Raymond > > > -- --Guido van Rossum (python.org/~guido)
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