Mailman 3 March 2016 - cython-devel

cygdb: no debug files were found
by Nathan Goldbaum Sept. 14, 2016

Sept. 14, 2016

Hi all, I'm following the directions in the link below to debug some cython code using cygdb: http://docs.cython.org/src/userguide/debugging.html Unfortunately, when I try to actually debug my program using cygdb, I get a "no debug files were found" error. It looks like the error is getting raised here: https://github.com/cython/cython/blob/master/Cython/Debugger/Cygdb.py#L33 So for some reason the "cython_debug" folder isn't being generated at build time. I tried to follow the directions closely, you can see the notes I put together during the installation process here: https://bpaste.net/show/6b11f815d449 Unfortunately the library I'm trying to debug (yt: bitbucket.org/yt_analysis/yt) uses a somewhat nonstandard build setup based on numpy distutils, and I suspect that is breaking some of the assumptions that went into the cygdb instructions in the cython docs. Does anyone have any idea what went wrong here? For now I'm going to fall back to regular gdb, and debug the autogenerated cython sources. Thanks for your help, Nathan Goldbaum

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Manylinux wheels for Cython
by Matthew Brett April 22, 2016

April 22, 2016

Hi, I don't know whether y'all have been following over at distutils-sig, but there's a new distutils PEP that defines a `manylinux` format for Linux wheels that work on many different x86 Linux distributions: https://www.python.org/dev/peps/pep-0513/ https://github.com/pypa/manylinux The latest version of pip will install these, if the client Linux system is compatible with the manylinux spec: https://pip.pypa.io/en/stable/news/ I've already built and used manylinux Cython wheels, which y'all are welcome to test with: pip install -f https://nipy.bic.berkeley.edu/manylinux cython (The wheels there don't have the right manylinux filenames yet, but they have the same contents as the ones that would go up to pypi). I've already had good use from these wheels in speeding up project builds into docker containers and virtualenvs, and I'd love to upload these to pypi. I have permissions on pypi to do this, but I wanted to check in with y'all first... Cheers, Matthew

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Re: [Cython] [cython-users] Re: Cython 0.23.5 released
by Matthew Brett March 31, 2016

March 31, 2016

On Wed, Mar 30, 2016 at 2:35 PM, Forest Gregg <fgregg(a)gmail.com> wrote: > Thanks! > > Are there also plans to post Windows wheels for cython 0.23.5 to pypi like > there was for 0.23.4? I did that earlier today, using an Appveyor build system : https://github.com/MacPython/cython-wheels/blob/master/appveyor.yml https://ci.appveyor.com/project/matthew-brett/cython-wheels http://win-wheels.scikit-image.org/ Do they work for you? Best, Matthew

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Cython 0.24 beta
by Robert Bradshaw March 26, 2016

March 26, 2016

I just pushed a beta for Cython 0.24. It can be downloaded at http://cython.org/release/Cython-0.24b0.tar.gz http://cython.org/release/Cython-0.24b0.zip https://github.com/cython/cython/tree/0.24.x It contains fixes to all the bugs reported with the alpha, as as well as the numerous improvements over 0.23.x. I have pulled in the last major changes I plan to make in this release (but development can continue on master). Thanks for the feedback so far; please continue to build and report. If there are no more issues discovered, this may well be the final release next week. - Robert

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Cython 0.23.5 released
by Stefan Behnel March 26, 2016

March 26, 2016

Hi all! I just pushed a pure bug-fix-only release for the current 0.23 series. Any major changes have been held back for the upcoming 0.24 feature release, so the update is recommended for those who can't wait. https://pypi.python.org/pypi/Cython/0.23.5 Complete changelog follows below. You can get the signed release from here: http://cython.org/release/Cython-0.23.5.tar.gz http://cython.org/release/Cython-0.23.5.zip SHA1 sums: ee455e4f6bedb8d02325da1d4810ab906c3ddc1d Cython-0.23.5.tar.gz a7ced83eab3bd4122513f3ea7d9f50ba1804a400 Cython-0.23.5.zip Have fun, Stefan 0.23.5 (2016-03-26) =================== Bugs fixed ---------- * Compile errors and warnings in integer type conversion code. This fixes ticket 877. Patches by Christian Neukirchen, Nikolaus Rath, Ian Henriksen. * Reference leak when "*args" argument was reassigned in closures. * Truth-testing Unicode strings could waste time and memory in Py3.3+. * Return values of async functions could be ignored and replaced by ``None``. * Compiler crash in CPython 3.6. * Fix prange() to behave identically to range(). The end condition was miscalculated when the range was not exactly divisible by the step. * Optimised ``all(genexpr)``/``any(genexpr)`` calls could warn about unused code. This fixes ticket 876.

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[ANN] Python compilers workshop at SciPy this year
by Nathaniel Smith March 22, 2016

March 22, 2016

Hi all, I wanted to announce a workshop I'm organizing at SciPy this year, and invite you to attend! What: A two-day workshop bringing together folks working on JIT/AOT compilation in Python. When/where: July 11-12, in Austin, Texas. (This is co-located with SciPy 2016, at the same time as the tutorial sessions, just before the conference proper.) Website: https://python-compilers-workshop.github.io/ Note that I anticipate that we'll be able to get sponsorship funding to cover travel costs for folks who can't get their employers to foot the bill. Cheers, -n -- Nathaniel J. Smith -- https://vorpus.org

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Re: [Cython] [cython-users] Re: Cython alpha 0.24
by Ian Henriksen March 22, 2016

March 22, 2016

On Mon, Mar 21, 2016 at 6:29 PM Martin Bammer <mrbm74(a)gmail.com> wrote: > Hi, > > I just saw that PyrexTypes.py seems to have a typo in lines 3740 and 3742: > > def __cmp__(self, other): > if isinstance(other, TemplatePlaceholderType): > return cmp(self.name, other.name) > else: > return cmp(type(self), type(other)) > > > PyCharm is complaining that "cmp" is an unresolved reference. > > Regards, > > Martin > > AFAICT, that whole function isn't really necessary. It defines the behavior for when you call `cmp` on an instance of that particular class. In Python 3 that particular builtin function doesn't exist. It'll work fine in Python 2, but since the codebase supports both it's not clear when that would actually be useful. Best, -Ian Henriksen

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PEP 498: literal string interpolation (f-strings)
by Stefan Behnel March 21, 2016

March 21, 2016

Hi all! Jelle Zijlstra has implemented this and contributed his implementation; I've given it some final touches. https://github.com/cython/cython/pull/501 The PEP has some examples for this new (Py3.6) feature: https://www.python.org/dev/peps/pep-0498/ Not sure if this still qualifies for 0.24 at this point, but it certainly is a very nice language feature. I got all CPython tests working (with minor deviations in Py2.6 where str.format() is "less optimal"), so this seems like a reasonable thing to add. Stefan

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Cython alpha 0.24
by Robert Bradshaw March 20, 2016

March 20, 2016

We are getting ready to push a new major release. A first alpha is up at http://cython.org/release/Cython-0.24a0.tar.gz To avoid surprises, please test and report. Thanks, Robert

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PEP 515: underscores in number literals
by Stefan Behnel March 19, 2016

March 19, 2016

Hi! PEP 515 proposes to allow underscores in number literals to provide a visual digit separator, e.g. for thousands, nibbles, hex-bytes/words, etc. https://www.python.org/dev/peps/pep-0515/ I've implemented it for Cython: https://github.com/cython/cython/pull/499 I think it's safe enough to still go into 0.24 as it only extends the supported syntax, but I'll leave it to Robert to decide. Stefan

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