[Python-Dev] Deprecating float.is_integer()

[Kirill Balunov]

2018-03-22 19:47 GMT+03:00 Tim Peters <tim.peters at gmail.com>:

>
> > Is this functionality so often used and practical to be a method of
> float,
> > int, ..., and not just to be an auxiliary function?
> >
> > p.s.: The same thoughts about `as_integer_ratio` discussion.
>
> I would have added them as functions in the `math` module instead.
> perhaps supported by dunder methods (__as_integer_ratio__,
> __is_integer__).  But that's not what happened, and whether or not
> they have double underscores on each end doesn't really make all that
> much difference except to dedicated pedants ;-)
>

Yes, this was my point. In spite of the fact that the pronouncement has
already been made, there may still be an opportunity to influence this
decision. I do not think that this is only a matter of choice, how this
functionality will be accessed through a method or function, in fact these
highly specialized methods heavily pollute the API and open the door for
persistent questions. Given the frequency and  activity of using this
`.is_integer` method the deprecation of this method is unlikely to greatly
affect someone. (for `as_integer_ratio` I think the bar is
higher). Summarizing this thread it seems to me that with deprecation of
`is_integer` method and with addition of `is_integer` function in math
module will make everyone happy:

PROS:

1. Those who do not like this method, and do not want to see it as a
redundant part of `int`, ... will be happy
2. Those who need it will have this functionality through math module
3. Compatible packages do not have to quack louder
4. Cleaner API (no need to add this through numeric tower)
5. Make everyone happy and stop this thread :)

CONS:

1. Backward incompatible change

I do not want to restart this topic, but I think that there is an
opportunity for improvement that can be missed.

With kind regards,
-gdg
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