Mailman 3 March 2001 - 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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Re: [Distutils] RPMs should include Python version in filename
by s-thapa-11＠alumni.uchicago.edu March 31, 2001

March 31, 2001

On Sat, Mar 31, 2001 at 01:06:48AM +0200, M.-A. Lemburg wrote: > The reason is simple: the Python API has changed between > versions and also the path used by the files inside the > packages use the major.minor version number. > > The same problem most probably also occurrs for bdist_dumb > archives and most other binary distribution formats. > With rpm and probably other package formats like deb, you can have a requires that indicates the version of python needed for installation. E.g. if you place Requires: BeOpen-Python = 2.0 in the spec file, the resulting rpm won't install on systems without python 2.0 user intervention. Similarly a BuildRequires tag allows for specifying dependencies in the build process although I don't think it is very applicable to bdist. -- ------------------------------------------------------------------ Suchandra S. Thapa s-thapa-11(a)alumni.uchicago.edu ------------------------------------------------------------------

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Re: [Distutils] RPMs should include Python version in filename
by M.-A. Lemburg March 31, 2001

March 31, 2001

s-thapa-11(a)alumni.uchicago.edu wrote: > > On Sat, Mar 31, 2001 at 01:06:48AM +0200, M.-A. Lemburg wrote: > > The reason is simple: the Python API has changed between > > versions and also the path used by the files inside the > > packages use the major.minor version number. > > > > The same problem most probably also occurrs for bdist_dumb > > archives and most other binary distribution formats. > > > > With rpm and probably other package formats like deb, you can > have a requires that indicates the version of python needed > for installation. E.g. if you place Requires: BeOpen-Python = 2.0 > in the spec file, the resulting rpm won't install on systems > without python 2.0 user intervention. Similarly a BuildRequires > tag allows for specifying dependencies in the build process although > I don't think it is very applicable to bdist. Thanks for the infos. My main certain about the filename is different though: I want people to download the correct version for their system and also need to provide separate files for different Python versions. -- Marc-Andre Lemburg ______________________________________________________________________ Company & Consulting: http://www.egenix.com/ Python Pages: http://www.lemburg.com/python/

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RPMs should include Python version in filename
by M.-A. Lemburg March 30, 2001

March 30, 2001

The subject says it all... I think that it would be a good idea to add the Python version in the RPM filename much like bdist_wininst does this for Windows, e.g. my-package-1.2.3-1-py1.5.i386.rpm my-package-1.2.3-1-py2.0.i386.rpm my-package-1.2.3-1-py2.1.i386.rpm The reason is simple: the Python API has changed between versions and also the path used by the files inside the packages use the major.minor version number. The same problem most probably also occurrs for bdist_dumb archives and most other binary distribution formats. Thoughts ? -- Marc-Andre Lemburg ______________________________________________________________________ Company & Consulting: http://www.egenix.com/ Python Pages: http://www.lemburg.com/python/

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PEP: Use site-packages on all platforms
by Moore, Paul March 30, 2001

March 30, 2001

Attached is a first draft of a proposal to use the "site-packages" directory for locally installed modules, on all platforms instead of just on Unix. If the consensus is that this is a worthwhile proposal, I'll submit it as a formal PEP. Any advice or suggestions welcomed - I've never written a PEP before - I hope I've got the procedure right... Paul Moore PEP: TBA Title: Install local packages in site-packages on all platforms Version $Revision$ Author: Paul Moore <gustav(a)morpheus.demon.co.uk> Status: Draft Type: Standards Track Python-Version: 2.2 Created: 2001-03-30 Post-History: TBA Abstract The standard Python distribution includes a directory Lib/site-packages, which is used on Unix platforms to hold locally-installed modules and packages. The site.py module distributed with Python includes support for locating modules in this directory. This PEP proposes that the site-packages directory should be used uniformly across all platforms for locally installed modules. Motivation On Windows platforms, the default setting for sys.path does not include a directory suitable for users to install locally-developed modules. The "expected" location appears to be the directory containing the Python executable itself. Including locally developed code in the same directory as installed executables is not good practice. Clearly, users can manipulate sys.path, either in a locally modified site.py, or in a suitable sitecustomize.py, or even via .pth files. However, there should be a standard location for such files, rather than relying on every individual site having to set their own policy. In addition, with distutils becoming more prevalent as a means of distributing modules, the need for a standard install location for distributed modules will become more common. It would be better to define such a standard now, rather than later when more distutils-based packages exist which will need rebuilding. It is relevant to note that prior to Python 2.1, the site-packages directory was not included in sys.path for Macintosh platforms. This has been changed in 2.1, and Macintosh includes sys.path now, leaving Windows as the only major platform with no site-specific modules directory. Implementation The implementation of this feature is fairly trivial. All that would be required is a change to site.py, to change the section setting sitedirs. The Python 2.1 version has if os.sep == '/': sitedirs = [makepath(prefix, "lib", "python" + sys.version[:3], "site-packages"), makepath(prefix, "lib", "site-python")] elif os.sep == ':': sitedirs = [makepath(prefix, "lib", "site-packages")] else: sitedirs = [prefix] A suitable change would be to simply replace the last 4 lines with else: sitedirs = [makepath(prefix, "lib", "site-packages")] Changes would also be required to distutils, in the sysconfig.py file. It is worth noting that this file does not seem to have been updated in line with the change of policy on the Macintosh, as of this writing. Notes 1. It would be better if this change could be included in Python 2.1, as changing something of this nature is better done sooner, rather than later, to reduce the backward-compatibility burden. This is extremely unlikely to happen at this late stage in the release cycle, however. 2. This change does not preclude packages using the current location - the change only adds a directory to sys.path, it does not remove anything. 3. In the Windows distribution of Python 2.1 (beta 1), the Lib\site-packages directory has been removed. It would need to be reinstated. Copyright This document has been placed in the public domain.

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Re: [Distutils] Header installation
by Jack Jansen March 30, 2001

March 30, 2001

> You just have to give up in order to realize that this can be done > rather easily: > > from distutils.command.install_headers import install_headers > > class modified_install_headers(install_headers): > > def finalize_options(self): > install_headers.finalize_options(self) > self.install_dir = \ > os.path.join(os.path.split(self.install_dir)[0], > 'Scientific') > > setup( ... , cmdclass = {'install_headers': modified_install_headers}) Ah, brilliant! This is the sort of thing that should go into the documentation. Seeing one example of this overriding will help the intelligent reader a lot with distutils customization. -- Jack Jansen | ++++ stop the execution of Mumia Abu-Jamal ++++ Jack.Jansen(a)oratrix.com | ++++ if you agree copy these lines to your sig ++++ www.oratrix.nl/~jack | see http://www.xs4all.nl/~tank/spg-l/sigaction.htm

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