[Python-Dev] Symmetry arguments for API expansion (original) (raw)

David Mertz mertz at gnosis.cx
Mon Mar 12 17:40:23 EDT 2018

If anyone cares, my vote is to rip out both .as_integer_ratio() and .is_integer() from Python. I've never used either and wouldn't want to.

Both seem like perfectly good functions for the math module, albeit the former is simply the Fraction() constructor.

I can see no sane reason why anyone would ever call float.is_integer() actually. That should always be spelled math.isclose(x, int(x)) because IEEE-754. Attractive nuisance is probably too generous, I'd simply call the method a bug.

On Mon, Mar 12, 2018, 2:21 PM Tim Peters <tim.peters at gmail.com> wrote:

[Guido] > .... asintegerratio() seems mostly cute (it has Tim Peters all > over it),

Nope! I had nothing to do with it. I would have been -0.5 on adding it had I been aware at the time. - I expect the audience is tiny. - While, ya, I have uses for it, I had a utility function for it approximately forever (it's easily built on top of math.frexp()). - Especially now, fractions.Fraction(somefloat) is the same thing except for return type.

> OTOH it looks like Decimal has it, Looks like ints got it first, and then spread to Decimal because "why not?" ;-) The first attempt to spread it to Decimal I found was rejected (which would have been my vote too): https://bugs.python.org/issue8947 > so I think this ship has sailed too and maybe it's best to add it to the > numeric tower just to be done with it. Or rip it out of everything. Either way works for me ;-)

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