Mailman 3 July 2017 - Distutils-SIG

Sample setup.py for Numeric Python
by Greg Ward April 29, 2018

April 29, 2018

Hi again -- [cc'd to Paul Dubois: you said you weren't following the distutils sig anymore, but this directly concerns NumPy and I'd like to get your input!] here's that sample setup.py for NumPy. See below for discussion (and questions!). ------------------------------------------------------------------------ #!/usr/bin/env python # Setup script example for building the Numeric extension to Python. # This does sucessfully compile all the .dlls. Nothing happens # with the .py files currently. # Move this file to the Numerical directory of the LLNL numpy # distribution and run as: # python numpysetup.py --verbose build_ext # # created 1999/08 Perry Stoll __rcsid__ = "$Id: numpysetup.py,v 1.1 1999/09/12 20:42:48 gward Exp $" from distutils.core import setup setup (name = "numerical", version = "0.01", description = "Numerical Extension to Python", url = "http://www.python.org/sigs/matrix-sig/", ext_modules = [ ( '_numpy', { 'sources' : [ 'Src/_numpymodule.c', 'Src/arrayobject.c', 'Src/ufuncobject.c' ], 'include_dirs' : ['./Include'], 'def_file' : 'Src/numpy.def' } ), ( 'multiarray', { 'sources' : ['Src/multiarraymodule.c'], 'include_dirs' : ['./Include'], 'def_file': 'Src/multiarray.def' } ), ( 'umath', { 'sources': ['Src/umathmodule.c'], 'include_dirs' : ['./Include'], 'def_file' : 'Src/umath.def' } ), ( 'fftpack', { 'sources': ['Src/fftpackmodule.c', 'Src/fftpack.c'], 'include_dirs' : ['./Include'], 'def_file' : 'Src/fftpack.def' } ), ( 'lapack_lite', { 'sources' : [ 'Src/lapack_litemodule.c', 'Src/dlapack_lite.c', 'Src/zlapack_lite.c', 'Src/blas_lite.c', 'Src/f2c_lite.c' ], 'include_dirs' : ['./Include'], 'def_file' : 'Src/lapack_lite.def' } ), ( 'ranlib', { 'sources': ['Src/ranlibmodule.c', 'Src/ranlib.c', 'Src/com.c', 'Src/linpack.c', ], 'include_dirs' : ['./Include'], 'def_file' : 'Src/ranlib.def' } ), ] ) ------------------------------------------------------------------------ First, what d'you think? Too clunky and verbose? Too much information for each extension? I kind of think so, but I'm not sure how to reduce it elegantly. Right now, the internal data structures needed to compile a module are pretty obviously exposed: is this a good thing? Or should there be some more compact form for setup.py that will be expanded later into the full glory we see above? I've already made one small step towards reducing the amount of cruft by factoring 'include_dirs' out and supplying it directly as a parameter to 'setup()'. (But that needs code not in the CVS archive yet, so I've left the sample setup.py the same for now.) The next thing I'd like to do is get that damn "def_file" out of there. To support it in MSVCCompiler, there's already an ugly hack that unnecessarily affects both the UnixCCompiler and CCompiler classes, and I want to get rid of that. (I refer to passing the 'build_info' dictionary into the compiler classes, if you're familiar with the code -- that dictionary is part of the Distutils extension-building system, and should not propagate into the more general compiler classes.) But I don't want to give these weird "def file" things standing on the order of source files, object files, libraries, etc., because they seem to me to be a bizarre artifact of one particular compiler, rather than something present in a wide range of C/C++ compilers. Based on the NumPy model, it seems like there's a not-too-kludgy way to handle this problem. Namely: if building extension "foo": if file "foo.def" found in same directory as "foo.c" add "/def:foo.def" to MSVC command line this will of course require some platform-specific code in the build_ext command class, but I figured that was coming eventually, so why put it off? ;-) To make this hack work with NumPy, one change would be necessary: rename Src/numpy.def to Src/_numpy.def to match Src/_numpy.c, which implements the _numpy module. Would this be too much to ask of NumPy? (Paul?) What about other module distributions that support MSVC++ and thus ship with "def" files? Could they be made to accomodate this scheme? Thanks for your feedback -- Greg -- Greg Ward - software developer gward(a)cnri.reston.va.us Corporation for National Research Initiatives 1895 Preston White Drive voice: +1-703-620-8990 Reston, Virginia, USA 20191-5434 fax: +1-703-620-0913

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Can now compile simple extensions
by Greg Ward April 29, 2018

April 29, 2018

Hi all -- at long last, I found the time to hack in the ability to compile extension modules to the Distutils. Mainly, this meant adding a 'build_ext' command which uses a CCompiler instance for all its dirty work. I also had to add a few methods to CCompiler (and, of course, UnixCCompiler) to make this work. And I added a new module, 'spawn', which takes care of running sub-programs more efficiently and robustly (no shell involved) than os.system. That's needed, obviously, so we can run the compiler! If you're in the mood for grubbing over raw source code, then get the latest from CVS or download a current snapshot. See http://www.python.org/sigs/distutils-sig/implementation.html for a link to the code snapshot. I'm still waiting for more subclasses of CCompiler to appear. At the very least, we're going to need MSVCCompiler to build extensions on Windows. Any takers? Also, someone who knows the Mac, and how to run compilers programmatically there, will have to figure out how to write a Mac-specific concrete CCompiler subclass. The spawn module also needs a bit of work to be portable. I suspect that _win32_spawn() (the intended analog to my _posix_spawn()) will be easy to implement, if it even needs to go in a separate function at all. It looks from the Python Library documentation for 1.5.2 that the os.spawnv() function is all we need, but it's a bit hard to figure out just what's needed. Windows wizards, please take a look at the 'spawn()' function and see if you can make it work on Windows. As for actually compiling extensions: well, if you can figure out the build_ext command, go ahead and give it a whirl. It's a bit cryptic right now, since there's no documentation and no example setup.py. (I have a working example at home, but it's not available online.) If you feel up to it, though, see if you can read the code and figure out what's going on. I'm just hoping *I'll* be able to figure out what's going on when I get back from the O'Reilly conference next week... ;-) Enjoy -- Greg -- Greg Ward - software developer gward(a)cnri.reston.va.us Corporation for National Research Initiatives 1895 Preston White Drive voice: +1-703-620-8990 Reston, Virginia, USA 20191-5434 fax: +1-703-620-0913

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Two fixes (at last)
by Greg Ward April 29, 2018

April 29, 2018

Hi all -- at long last, I have fixed two problems that a couple people noticed a while ago: * I folded in Amos Latteier's NT patches almost verbatim -- just changed an `os.path.sep == "/"' to `os.name == "posix"' and added some comments bitching about the inadequacy of the current library installation model (I think this is Python's fault, but for now Distutils is slavishly aping the situation in Python 1.5.x) * I fixed the problem whereby running "setup.py install" without doing anything else caused a crash (because 'build' hadn't yet been run). Now, the 'install' command automatically runs 'build' before doing anything; to make this bearable, I added a 'have_run' dictionary to the Distribution class to keep track of which commands have been run. So now not only are command classes singletons, but their 'run' method can only be invoked once -- both restrictions enforced by Distribution. The code is checked into CVS, or you can download a snapshot at http://www.python.org/sigs/distutils-sig/distutils-19990607.tar.gz Hope someone (Amos?) can try the new version under NT. Any takers for Mac OS? BTW, all parties involved in the Great "Where Do We Install Stuff?" Debate should take a good, hard look at the 'set_final_options()' method of the Install class in distutils/install.py; this is where all the policy decisions about where to install files are made. Currently it apes the Python 1.5 situation as closely as I could figure it out. Obviously, this is subject to change -- I just don't know to *what* it will change! Greg -- Greg Ward - software developer gward(a)cnri.reston.va.us Corporation for National Research Initiatives 1895 Preston White Drive voice: +1-703-620-8990 Reston, Virginia, USA 20191-5434 fax: +1-703-620-0913

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Package versioning
by Timothy Docker April 29, 2018

April 29, 2018

Hi all, I've been aware that the distutils sig has been simmerring away, but until recently it has not been directly relevant to what I do. I like the look of the proposed api, but have one question. Will this support an installed system that has multiple versions of the same package installed simultaneously? If not, then this would seem to be a significant limitation, especially when dependencies between packages are considered. Assuming it does, then how will this be achieved? I am presently managing this with a messy arrangement of symlinks. A package is installed with its version number in it's name, and a separate directory is created for an application with links from the unversioned package name to the versioned one. Then I just set the pythonpath to this directory. A sample of what the directory looks like is shown below. I'm sure there is a better solution that this, and I'm not sure that this would work under windows anyway (does windows have symlinks?). So, has this SIG considered such versioning issues yet? Cheers, Tim -------------------------------------------------------------- Tim Docker timd(a)macquarie.com.au Quantative Applications Division Macquarie Bank -------------------------------------------------------------- qad16:qad $ ls -l lib/python/ total 110 drwxr-xr-x 2 mts mts 512 Nov 11 11:23 1.1 -r--r----- 1 root mts 45172 Sep 1 1998 cdrmodule_0_7_1.so drwxr-xr-x 2 mts mts 512 Sep 1 1998 chart_1_1 drwxr-xr-x 3 mts mts 512 Sep 1 1998 Fnorb_0_7_1 dr-xr-x--- 3 mts mts 512 Nov 11 11:21 Fnorb_0_8 drwxr-xr-x 3 mts mts 1536 Mar 3 12:45 mts_1_1 dr-xr-x--- 7 mts mts 512 Nov 11 11:22 OpenGL_1_5_1 dr-xr-x--- 2 mts mts 1024 Nov 11 11:23 PIL_0_3 drwxr-xr-x 3 mts mts 512 Sep 1 1998 Pmw_0_7 dr-xr-x--- 2 mts mts 512 Nov 11 11:21 v3d_1_1 qad16:qad $ ls -l lib/python/1.1 total 30 lrwxrwxrwx 1 root other 29 Apr 10 10:43 _glumodule.so -> ../OpenGL_1_5_1/_glumodule.so lrwxrwxrwx 1 root other 30 Apr 10 10:43 _glutmodule.so -> ../OpenGL_1_5_1/_glutmodule.so lrwxrwxrwx 1 root other 22 Apr 10 10:43 _imaging.so -> ../PIL_0_3/_imaging.so lrwxrwxrwx 1 root other 36 Apr 10 10:43 _opengl_nummodule.so -> ../OpenGL_1_5_1/_opengl_nummodule.so lrwxrwxrwx 1 root other 27 Apr 10 10:43 _tkinter.so -> ../OpenGL_1_5_1/_tkinter.so lrwxrwxrwx 1 mts mts 21 Apr 10 10:43 cdrmodule.so -> ../cdrmodule_0_7_1.so lrwxrwxrwx 1 mts mts 12 Apr 10 10:43 chart -> ../chart_1_1 lrwxrwxrwx 1 root other 12 Apr 10 10:43 Fnorb -> ../Fnorb_0_8 lrwxrwxrwx 1 mts mts 12 Apr 10 10:43 mts -> ../mts_1_1 lrwxrwxrwx 1 root other 15 Apr 10 10:43 OpenGL -> ../OpenGL_1_5_1 lrwxrwxrwx 1 root other 33 Apr 10 10:43 opengltrmodule.so -> ../OpenGL_1_5_1/opengltrmodule.so lrwxrwxrwx 1 root other 33 Apr 10 10:43 openglutil_num.so -> ../OpenGL_1_5_1/openglutil_num.so lrwxrwxrwx 1 root other 10 Apr 10 10:43 PIL -> ../PIL_0_3 lrwxrwxrwx 1 mts mts 10 Apr 10 10:43 Pmw -> ../Pmw_0_7 lrwxrwxrwx 1 root other 10 Apr 10 10:43 v3d -> ../v3d_1_1

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[Distutils-sig] distutils charter and interscript
by John Skaller April 29, 2018

April 29, 2018

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ANNOUNCE: Sunsetting of uploading to the legacy PyPI/TestPyPI
by Donald Stufft April 17, 2018

April 17, 2018

Hello All! As most people are aware, there has been an effort under way to rewrite PyPI in order to solve a lot of long standing problems. For those who aren't aware, that is currently available at https://pypi.org/ and it uses the same database that "Legacy" PyPI does, so the two are essentially just different views over the same data. For a awhile now, Python, setuptools, and twine have all defaulted to using this new code base for uploading artifacts to PyPI. Now that we've gotten some testing of that code base, the infrastructure team and myself feel comfortable directing everyone to using the new endpoint and we're planning on shutting down uploads to Legacy PyPI. If you're using the latest versions of Python, setuptools, or twine and you have not put an explicit URL in your ~/.pypirc file, then there's nothing you should need to do. If you are not, then you should ideally upgrade to the latest version of whatever tool you're using to upload (the preferred tool is twine) and edit your ~/.pypirc so that it removes any explicit mention of an URL. Thus it should look something like: [distutils] index-servers = pypi [pypi] username:yourusername password:yourpassword If for some reason you're not able to update to the newest version of your upload tool, then you can configure it to upload to the new code base by switching the URL to use https://upload.pypi.org/legacy/ instead of https://pypi.python.org/pypi. Thus your ~/.pypirc would then become: [distutils] index-servers = pypi [pypi] repository:https://upload.pypi.org/legacy/ username:yourusername password:yourpassword For those of you who are using TestPyPI, that will also be affected, and the required URL for the new upload endpoint for TestPyPI is https://test.pypi.org/legacy/. We plan to disable uploads to legacy PyPI on July 3rd, 2017 so any configuration change will need to be made before that date. In addition, we plan to have a "brownout" on June 29th where we will shut the legacy endpoint down for that day. For TestPyPI the change to disable uploads to legacy will be made in the next couple of days, likely this weekend. As part of the error message that users will get when attempting to upload to legacy PyPI, we will include a link to a page that details how to ensure that they are using the new code base and not the legacy code base. Thanks everyone! — Donald Stufft

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status check on PEP 517
by Nathaniel Smith Aug. 5, 2017

Aug. 5, 2017

Hi all, So looking over the big threads from the last week, I *think* I have a reasonable sense of what different people think about the different trade-offs here... but I'm not sure. And I'm guessing I'm not the only one feeling uncertain here. So in this post I'm not going to argue for anything at all! It's purely for information gathering, to try and stop, take stock, and figure out where everyone actually is at this point. To make this concrete: I'm *pretty* sure (?) that at this point all the basic elements in my "simplified" rewrite are things that we now have consensus are needed in some form, so maybe we can use that as a kind of "minimal core" reference point: https://github.com/njsmith/peps/commits/517-refactor-streamline/pep-0517.txt (Again, I'm NOT arguing for this right now, I just figure there's been enough stuff flying by that it's useful to have a concrete reference point.) And I'd really appreciate hearing answers to these questions, from at least Daniel, Donald, Nick, Paul, Thomas, and of course anyone else who wants to speak up: - Is there anything missing from this "minimal core" that *you or your projects* need? - Is there anything missing that you think will cause problems for *others*? - Is there anything in there that you feel adds unnecessary complexity? - Is there anything missing that you think is definitely something we'll want eventually? Is it something where writing a small dedicated followup PEP would produce a materially worse outcome than including it from the start? Thanks! -n PS: just for the record, the link above is almost identical to the version I sent before; main change is some TODO notes added at the end. Diff view: https://github.com/njsmith/peps/compare/64b839a39101bc96bef883f09185e2c6c77… -- Nathaniel J. Smith -- https://vorpus.org

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setup.cfg - to interpolate or not to interpolate
by Jason R. Coombs July 28, 2017

July 28, 2017

In Setuptools #889 (https://github.com/pypa/setuptools/issues/889) and Python 20754 (http://bugs.python.org/issue20754), setuptools and distutils are proposing a backward-incompatible change - to remove ConfigParser interpolation when parsing setup.cfg (and maybe other config) files. I’d previously thought that it was an unintended regression from Python 2 to introduce interpolation, but on deeper investigation, interpolation has been present all along. While it’s conceivable that no projects are relying on the interpolation behavior, I’d be surprised if none have at least worked around the interpolation behavior by escaping percent signs. So I’m left with the sinking feeling there’s no easy transition from the status quo to the desired state (no interpolation). I’d like feedback, in either ticket, about whether this change is worth the trouble and if so if there are any ways to mitigate the risks of introducing such a change. If someone can assist on this effort, that would also be greatly appreciated. I’ll likely abandon the effort and close the tickets as won’t fix unless we can identify someone to champion the effort.

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how to build a python extension with a shared object in osx10.11
by bin July 27, 2017

July 27, 2017

I have installed libfoo.dylib into /usr/local/lib And my python extension's setup.py: from distutils.core import setup, Extension module1 = Extension('bar', libraries=['libfoo2.dylib', ], language="c++", extra_compile_args=['-v', ], sources=['main.cpp']) setup(name='PackageName', version='1.0', description='This is a demo package', ext_modules=[module1]) but it build failed for can not founding the libfoo2.dylib. Here is complie message: "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/lipo" -create -output build/temp.macosx-10.11-intel-2.7/main.o /var/folders/45/gz7ljrz94mdct3nvm9l5ftnr0000gp/T/main-684613.o /var/folders/45/gz7ljrz94mdct3nvm9l5ftnr0000gp/T/main-94fc36.o c++ -bundle -undefined dynamic_lookup -arch i386 -arch x86_64 -Wl,-F. build/temp.macosx-10.11-intel-2.7/main.o -L/usr/local/lib -llibfoo2.dylib -o build/lib.macosx-10.11-intel-2.7/bar.so ld: library not found for -llibfoo2.dylib clang: error: linker command failed with exit code 1 (use -v to see invocation) error: command 'c++' failed with exit status 1

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PyPi’s predictable download url
by Aleks Bunin July 27, 2017

July 27, 2017

Hello, I’m writing installation instructions for a package and have a question: what is the correct predictable URL for the package? I found couple. Which one of these guaranteed won’t change again in the future? - https://pypi.python.org/packages/source/v/virtualenv/virtualenv-15.1.0.tar.… (used to work in the past, but doesn’t seem to work now, copied from virtualenv’s docs <https://virtualenv.pypa.io/en/latest/installation/>) - https://pypi.io/packages/source/v/virtualenv/virtualenv-15.1.0.tar.gz - https://pypi.org/packages/source/v/virtualenv/virtualenv-15.1.0.tar.gz - https://files.pythonhosted.org/packages/source/v/virtualenv/virtualenv-15.1… Is there a predictable URL, which will return latest version of the package? Thank you. — Regards, *Aleks* *Bunin* -- *DISCLAIMER* This communication is intended only for the personal use of the recipient(s) named above and may contain information and/or attachments that are privileged, confidential, proprietary and protected from disclosure. If you are not the intended recipient of this message, you are hereby notified that any dissemination, distribution or copying of this message, and any attachments thereto, is strictly prohibited. If you receive this message in error, please promptly delete it without further distribution and reply to the sender that you have received the message in error. This communication or any attachment thereto is not intended, and should not be construed, as a investment advice or and does not constitute an offer or commitment, a solicitation of an offer, or any advice or recommendation, to enter into or conclude any transaction. This communication or any attachment thereto is not intended, and should not be construed, as legal, tax, public accounting or auditing advice or opinions. You should consult your legal counsel, accountants and/or tax advisors prior to making any decisions or taking any action concerning the matters in this communication. Attachments hereto may have additional important disclosures and disclaimers, which you should read.

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