[Cython] Cython 3.0 alpha 5 released

[Stefan Behnel]

Hi all,

here's the 5th alpha for 3.0. It goes together with the equally fresh
0.29.18 release that contains a long list of bug fixes, as well as faster
memory view slicing.

Download:
https://pypi.org/project/Cython/3.0a5/

Changelog:
https://github.com/cython/cython/blob/master/CHANGES.rst

Let's see where fate takes these releases.

Stefan



Stefan Behnel schrieb am 05.05.20 um 19:32:
> Hi all,
> 
> here's yet another alpha release for you, with some great new features and
> even more bug fixes this time, and now hopefully generating proper C code
> for nogil code again.
> 
> Download:
> https://pypi.org/project/Cython/3.0a4/
> 
> Changelog:
> https://github.com/cython/cython/blob/master/CHANGES.rst
> 
> I'll wait a day or two for reports on bugs and regressions and then also
> prepare the corresponding 0.29.18 release with the relevant backported bug
> fixes.
> 
> Have fun,
> Stefan
> 
> 
> 
> Stefan Behnel schrieb am 27.04.20 um 18:36:
>> … and a third alpha is out, with several fixes (thanks!) for reported
>> regressions and issues (thanks!), as well as streamlined GIL handling in
>> nogil functions that contain "with gil" sections.
>>
>> Download:
>> https://pypi.org/project/Cython/3.0a3/
>>
>> Changelog:
>> https://github.com/cython/cython/blob/master/CHANGES.rst
>>
>> This release was brought to you with the invaluable help of Yusuf Cat
>> Stevens and Deutsche Bahn. Thanks to everyone out there who's doing their
>> job keeping others alive/healthy/undepressed/fed/mobile/connected/working/…
>> in these (for many people) difficult days.
>>
>> Stefan
>>
>>
>>
>> Stefan Behnel schrieb am 23.04.20 um 17:39:
>>> Hi all,
>>>
>>> here's the second alpha. I hope we got all major regressions fixed for this
>>> release that were reported since alpha 1.
>>>
>>> Download:
>>> https://pypi.org/project/Cython/3.0a2/
>>>
>>> Changelog:
>>> https://github.com/cython/cython/blob/master/CHANGES.rst
>>>
>>> Have fun,
>>> Stefan
>>>
>>>
>>>
>>> Stefan Behnel schrieb am 12.04.20 um 12:24:
>>>> Dear Cython users and devs,
>>>>
>>>> today, I'm happy to announce the first alpha release of Cython 3.0.
>>>>
>>>> https://pypi.org/project/Cython/3.0a1/
>>>>
>>>> It took us a while to get to this point, well more than a year's time, but
>>>> we received a lot of help along the way, most notably from David Woods,
>>>> Jeroen Demeyer and Matti Picus. Thanks a lot, and also to the many other
>>>> contributors! For this release, we already have 182 closed issues and
>>>> merged PRs, including 109 PRs contributed by non-core devs!
>>>>
>>>>
>>>> ** What is Cython 3.0?
>>>>
>>>> Cython 3.0 is our effort to bring Cython up to date with modern Python 3,
>>>> after an 18 year long development history. According to the Python mailing
>>>> list archive [1] and Greg's download directory [2], Cython's predecessor
>>>> Pyrex 0.1 was announced and released to the public on April 4th, 2002.
>>>>
>>>> Cython is finally coming of age. :)
>>>>
>>>>
>>>> ** So, what's new?
>>>>
>>>> Too much. Way too much for this announcement. Cython 3.0 comes with a very
>>>> long list of new features, bug fixes and modernisations, a few of which are
>>>> backwards incompatible, but in a good way. See the latest changelog:
>>>>
>>>> https://github.com/cython/cython/blob/master/CHANGES.rst
>>>>
>>>> Here's a short teaser list anyway:
>>>> - Python 3 semantics by default, legacy Python 2 semantics via directive.
>>>> - No more deprecated NumPy C-API usage.
>>>> - Unicode module names, imports, and identifiers (PEP-3131, PEP-489).
>>>> - Support for the fast vectorcall protocol (PEP-590).
>>>> - Inlined properties on external cdef classes.
>>>> - Faster dispatch for fused functions.
>>>> - First steps towards supporting CPython's stable ABI (PEP-384).
>>>>
>>>>
>>>> ** How alpha is it?
>>>>
>>>> Well. It's not complete yet [3]. It still has some known issues. There are
>>>> still some unmerged PRs waiting. Support for the limited API is … limited.
>>>>
>>>> But, it's in a good shape and probably ready enough for you to make use of
>>>> all those cool new features. Please give it a try and report back if you
>>>> find issues that we can still improve on in the upcoming pre-releases. PRs
>>>> very welcome!
>>>>
>>>> As always, if it works for you, use it. Generate your C code locally with
>>>> it, test it, then ship it to your users. Once the code is compiled, they
>>>> don't even have to know that you've used an alpha version. :)
>>>>
>>>>
>>>> Have fun,
>>>>
>>>> Stefan
>>>>
>>>>
>>>>
>>>> [1] https://mail.python.org/pipermail/python-list/2002-April/126661.html
>>>> [2] https://www.csse.canterbury.ac.nz/greg.ewing/python/Pyrex/oldtar/
>>>> [3] https://github.com/cython/cython/milestone/58
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