[Cython] NumPy C API Status?

[Robert Bradshaw]

On Tue, Feb 2, 2016 at 10:43 AM, Marvin Ritter <marvin.ritter at gmail.com> wrote:
> Ok, I can update the numpy/__init__.pxd to match the new API and create a
> pull request for it. How do we want to handle the deprecated methods and
> types? 1.7 not only added new stuff it also changed return values and type
> names. If we remove old names user will be forced to update their code.
> Otherwise we can delay it until NumPy drops the old API.

How about you create a pull request to better visualize exactly what
changed. We may need to create two separate numpy files, but ideally
we'd be able to do it in such a way that people could migrate their
code over before we delete the old definitions.

> Updating the buffer support sounds like a good idea to me, we would get rid
> of the deprecation warning, but I think I'm not qualified enough for it.

Wouldn't hurt to give it a go. IIRC, many of the changes were moving
from using direct access (e.g. of structs) to using macros.

> On Tue, Feb 2, 2016 at 12:50 PM, Robert Bradshaw <robertwb at gmail.com> wrote:
>>
>> On Mon, Feb 1, 2016 at 3:22 PM, Marvin Ritter <marvin.ritter at gmail.com>
>> wrote:
>> > Hi,
>> >
>> > I have to use the NumPy C API for my current project and it seems that
>> > Cython 0.23.4 it only shipping definitions for on all version of the
>> > API.
>> > But I need some of the newer methods.
>> >
>> > What are your plans on updating? Is there anything that prevents you?
>> > And if not, how complicated is it? Could a novice like me do it?
>>
>> Back when this was being actively worked on, the "new" API was so new
>> that we didn't want to make it a dependency, but those days are long
>> past.
>>
>> It would be trivial to add new methods (etc.) to the pxd file at
>>
>> https://github.com/cython/cython/blob/master/Cython/Includes/numpy/__init__.pxd
>> . Updating the buffer support (e.g. used when writing np.ndarray[int])
>> to use the new API would be welcome too, but more involved.
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>
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