[Cython] Cython 3.0 alpha 2 released

[Stefan Behnel]

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