On Sat, Jun 4, 2016 at 11:22 AM, Charles R Harris <charlesr.har...@gmail.com
> wrote:
> Hi All,
>
> I've made a new post so that we can make an explicit decision. AFAICT, the
> two proposals are
>
>
> 1. Integers to negative integer powers raise an error.
> 2. Integers to integer powers always results in floats.
>
> My own sense is that 1. would be closest to current behavior and using a
> float exponential when a float is wanted is an explicit way to indicate
> that desire. OTOH, 2. would be the most convenient default for everyday
> numerical computation, but I think would more likely break current code. I
> am going to come down on the side of 1., which I don't think should cause
> too many problems if we start with a {Future, Deprecation}Warning
> explaining the workaround.
>
Note that current behavior in 1.11 is such a mess
```
In [5]: array([0], dtype=int64) ** -1
Out[5]: array([-9223372036854775808])
In [6]: array([0], dtype=uint64) ** -1
Out[6]: array([ inf])
```
That the simplest approach might be to start by raising an error rather
than by trying to maintain current behavior and issuing a warning.
Chuck
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