[Python-Dev] Symmetry arguments for API expansion

[Guido van Rossum]

On Mon, Mar 12, 2018 at 10:01 PM, Tim Peters <tim.peters at gmail.com> wrote:

> At heart, the Fraction() constructor is _all about_ creating integer
> ratios, so is the most natural place to put knowledge of how to do so.
> A protocol for allowing new numeric types to get converted to Fraction
> would be more generally useful than just a weird method only datetime
> uses ;-)
>

Ironically, the various Fraction constructors *calls* as_integer_ratio()
for floats and Decimals. From which follows IMO that the float and Decimal
classes are the right place to encapsulate the knowledge on how to do it.

-- 
--Guido van Rossum (python.org/~guido)
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