[Cython] Cython 3.0 alpha 3 released

[Stefan Behnel]

… 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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