[Numpy-discussion] __numpy_ufunc__

[Ralf Gommers]

On Wed, Jul 16, 2014 at 10:07 AM, Nathaniel Smith <njs at pobox.com> wrote:

> Weirdly, I never received Chuck's original email in this thread. Should
> some list admin be informed?
>
Also weirdly, my reply didn't show up on gmane. Not sure if it got through,
so re-sending:

It's already in, so do you mean not using? Would help to know what the
issue is, because it's finished enough that it's already used in a released
version of scipy (in sparse matrices).

Ralf

I also am not sure what/where Julian's comments were, so I second the call
> for context :-). Putting it off until 1.10 doesn't seem like an obviously
> bad idea to me, but specifics would help...
>
> (__numpy_ufunc__ is the new system for allowing arbitrary third party
> objects to override how ufuncs are applied to them, i.e. it means
> np.sin(sparsemat) and np.sin(gpuarray) can be defined to do something
> sensible. Conceptually it replaces the old __array_prepare__/__array_wrap__
> system, which was limited to ndarray subclasses and has major limits on
> what you can do. Of course __array_prepare/wrap__ will also continue to be
> supported for compatibility.)
>
-n
> On 16 Jul 2014 00:10, "Benjamin Root" <ben.root at ou.edu> wrote:
>
>> Perhaps a bit of context might be useful? How is numpy_ufunc different
>> from the ufuncs that we know and love? What are the known implications?
>> What are the known shortcomings? Are there ABI and/or API concerns between
>> 1.9 and 1.10?
>>
>> Ben Root
>>
>>
>> On Mon, Jul 14, 2014 at 2:22 PM, Charles R Harris <
>> charlesr.harris at gmail.com> wrote:
>>
>>> Hi All,
>>>
>>> Julian has raised the question of including numpy_ufunc in numpy 1.9. I
>>> don't feel strongly one way or the other, but it doesn't seem to be
>>> finished yet and 1.10 might be a better place to work out the remaining
>>> problems along with the astropy folks testing possible uses.
>>>
>>> Thoughts?
>>>
>>> Chuck
>>>
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>>>
>>
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