[Cython] Cython 3.0 alpha 4 released

[Stefan Behnel]

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 beckported 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