[Numpy-discussion] Output type of round is inconsistent with python built-in
Robert Kern
robert.kern at gmail.com
Wed Feb 26 16:36:31 EST 2020
On Wed, Feb 26, 2020 at 3:19 PM Hameer Abbasi <einstein.edison at gmail.com>
wrote:
>
> There still remains the question, do we return Python ints or np.int64s?
>
> - Python ints have the advantage of not overflowing.
> - If we decide to add __round__ to arrays in the future, Python ints
> may become inconsistent with our design, as such a method will return an
> int64 array.
>
>
>
> This was issue was discussed in the weekly triage meeting today, and the
> following plan of action was proposed:
>
> - change scalar floats to return integers for __round__ (which integer
> type was not discussed, I propose np.int64)
> - not change anything else: not 0d arrays and not other numpy
> functionality
>
> The only reason that float.__round__() was allowed to change to returning
ints was because ints became unbounded. If we also change to returning an
integer type, it should be a Python int.
--
Robert Kern
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