Mailman 3 February 2003 - Distutils-SIG

Sample setup.py for Numeric Python
by Greg Ward 29 Apr '18

29 Apr '18

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 29 Apr '18

29 Apr '18

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 29 Apr '18

29 Apr '18

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 29 Apr '18

29 Apr '18

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 29 Apr '18

29 Apr '18

3 2

installing data files and headers
by Jeremy Hylton 18 Apr '03

18 Apr '03

Another problem we've been struggling with for Zope projects is that distutils really only installs Python modules and extensions. It's support for data files and C header files is pretty limited. We've got problems with each that could probably be solved in distutils. We often store data files in a package directory. Zope components sometimes have configuration files, presentation files like html and images, and other data. One common case is unit test packages, which often have test data in them. In all these cases, we find it useful to access the data files by loading them from the package directory. You get the package's __path__ attribute and look for data files in that directory. The problem is that distutils won't install these files for us. It ends up being a lot of work to get the files installed. You need to provide a custom distclass to copy the files at build and install time. It would be a lot more convenient if distutils would just install the files by default. I think there are some potential problems with installing non .py files. You need to have some control over what exactly gets built and installed, so that you don't install .py~ files. One possibility is to explicitly list the file extensions that constitute installable data. We did that for Zope3, but the list of extensions ended up being fairly long. The other problem we have is with header files. We'd like to have .h files that are installed inside a directory in /usr/local/include. For example, we'd like source code that uses the persistence API to read like this: #include "persistence/persistence.h" #include "persistence/persistenceAPI.h" I can't figure out any way to instruct distutils to create a persistence directory and put the headers in it. I think we'd need to extend the specification for header files to make this possible. Jeremy

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python-dev not installed on Unix
by Juergen Hermann 03 Mar '03

03 Mar '03

Hi! This is a VERY common error that traps users regularly: distutils.errors.DistutilsPlatformError: invalid Python installation: unable to open /usr/lib/python2.2/config/Makefile (No such file or directory) Could we extend that error message by a hint on installing the python- dev .rpm/.deb? if sys.platform = "unix": msg += "\nYou probably need to install..." Ciao, Jürgen

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More documentation for setup meta-data
by Richard Jones 01 Mar '03

01 Mar '03

I'm trying to better document the meta-data for the distutils (and hence PyPI). I've added words to the section in the dev doc about meta-data, and would like some feedback before I post the patch to be applied. Sorry, it's in LaTeX form (until someone writes the ReST->python doc converter ;) \subsection{Additional meta-data} \label{meta-data} The setup script may include additional meta-data beyond the name and version. This information includes: \begin{tableiii}{l|l|l|c}{code}% {Meta-Data}{Description}{Value}{Notes} \lineiii{name}{the name of the package}{short string}{(1)} \lineiii{version}{the version of this release}{short string}{(1)(4)} \lineiii{author}{package author's name}{short string}{(2)} \lineiii{author_email}{email address of the package author}{email address}{(2)} \lineiii{maintainer}{package maintainer's name}{short string}{(2)} \lineiii{maintainer_email}{email address of the package maintainer}{email address}{(2)} \lineiii{home_page}{the location of the homepage for the package}{URL}{(1)} \lineiii{description}{a short, summary description of the package}{short string}{} \lineiii{long_description}{a longer description of the package}{long string}{} \lineiii{download_url}{a location where the package may be downloaded}{URL}{(3)} \lineiii{classifiers}{a list of Trove classifiers}{list of strings}{(3)} \end{tableiii} \noindent Notes: \begin{description} \item[(1)] these fields are required \item[(2)] either the author or the maintainer must be nominated \item[(3)] should not be used if your package is to be compatible with Python versions prior to 2.2.3 or 2.3. The list is available from the PyPI website. \item[(4)] it is recommended that versions take the form <major>.<minor>.<patch>[.<sub>] \item["short string"] a single line of text, not more than 200 characters \item["long string"] multiple lines of text \item["list of strings"] see below \end{description} \option{version} encoding is an art in itself. Python packages generally adhere to the version format \em{major.minor.patch}. The major number is 0 for initial, experimental releases of software. It is incremented for releases that represent major milestones in a package. The minor number is incremented when important new features are added to the package. The patch number increments when bug-fix releases are made. Additional trailing version information is sometimes used to indicate sub-releases. These are "a1,a2,...,aN" (for alpha releases, where functionality and API may change), "b1,b2,...,bN" (for beta releases, which only fix bugs) and "pr1,pr2,...,prN" (for final pre-release release testing). Some examples: \begin{description} \item[0.1.0] the first, experimental release of a package \item[1.0.1a2] the second alpha release of the first patch version of 1.0 \end{description} \option{classifiers} are specified in a python list: \begin{verbatim} setup(... classifiers = [ 'Development Status :: 4 - Beta', 'Environment :: Console', 'Environment :: Web Environment', 'Intended Audience :: End Users/Desktop', 'Intended Audience :: Developers', 'Intended Audience :: System Administrators', 'License :: OSI Approved :: Python Software Foundation License', 'Operating System :: MacOS :: MacOS X', 'Operating System :: Microsoft :: Windows', 'Operating System :: POSIX', 'Programming Language :: Python', 'Topic :: Communications :: Email', 'Topic :: Office/Business', 'Topic :: Software Development :: Bug Tracking', ], ... ) \end{verbatim} If you wish to include classifiers in your \file{setup.py} file and also wish to remain backwards-compatible with Python releases prior to 2.2.3, then you can include the following code fragment in your \file{setup.py} before the \code{setup()} call. \begin{verbatim} # patch distutils if it can't cope with the "classifiers" or # "download_url" keywords if sys.version < '2.2.3': from distutils.dist import DistributionMetadata DistributionMetadata.classifiers = None DistributionMetadata.download_url = None \end{verbatim}

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packages and modules together
by Fred L. Drake, Jr. 28 Feb '03

28 Feb '03

Here's a topic that's come up before. Distutils does not currently support having both packages and modules in the same call to distutils.core.setup(). While this is probably fine for many projects, others have been bitten by it; Anthony Baxter asked about this just last month: http://mail.python.org/pipermail/distutils-sig/2003-January/003151.html We're increasingly using distutils with Zope, and would like to make our use of it as "clean" as possible. The current setup script I'm working with has to call distutils.core.setup() three times, which is just too many for me. Some of this can probably be improved by adjusting more of the provided knobs more carefully, but the simple use of both modules and packages seems like aviodable pain. Is there any reason not to support both in the distutils core directly? While the limitation can be worked around, it seems gratuitous, and shouldn't need the extra machinations. -Fred -- Fred L. Drake, Jr. <fdrake at acm.org> PythonLabs at Zope Corporation

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Re: [Catalog-sig] Re: [Distutils] More documentation for setup meta-data
by Laura Creighton 27 Feb '03

27 Feb '03

>The concept of a single URL for downloads seems to simplistic to >handle the issues involved with automatic installation. This >information should also be provided in a lazy way, so that the >package author can easily update the download links, e.g. by >placing the information in an XML file on his site and then >referencing this file in the distutils meta data. > >The file should then be parsed by a distutils subcommand to >find the right download URL depending on the platform and >Python version. > >-- >Marc-Andre Lemburg >eGenix.com > Will this make it possible to list multiple places where one can find software that is hosted more than one place? Seems desirable. Laura Creighton

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Distutils-SIG February 2003