Mailman 3 December 2010 - Distutils-SIG

Re: [Distutils] namespace packages ok to contain code?
by P.J. Eby 15 Dec '10

15 Dec '10

At 05:11 PM 12/13/2010 -0600, Brad Allen wrote: >Where I work we're considering a change to moving a group of packages >to using namespaces. We want the namespace paths to reflect a >dependency hierarchy, Note that you don't *need* to use namespace paths to reflect dependencies; the main purpose of namespace packages is to allow you to separately distribute parts of a larger package, and to avoid naming conflicts with code produced by other organizations. (In other words, it's a rare use case that really needs even *two* levels of namespace package; the common use is simply to make one parent namespace package for your organization. In general, the "flat is better than nested" rule of Python still applies. ;-) ) >Some have warned this is not usually done, but no specific problems >with this approach have been identified. Any guidance on this would be >appreciated. As Martin said, don't put code in the __init__.py of a namespace package. (And parent packages of namespace packages count as namespace packages.)

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Re: [Distutils] How to best install pkg_resources?
by P.J. Eby 14 Dec '10

14 Dec '10

At 07:30 PM 12/14/2010 +0100, Arve Knudsen wrote: >On Tue, Dec 14, 2010 at 7:22 PM, P.J. Eby ><<mailto:pje@telecommunity.com>pje(a)telecommunity.com> wrote: >At 06:30 PM 12/14/2010 +0100, Arve Knudsen wrote: >Argh :( Can you describe some other way of customizing the install >command that works better with setuptools? > > >That depends on what you're trying to do; but probably it will >involve subclassing the install command rather than simply invoking it. > >What are you trying to customize, anyway? There really aren't many >user-serviceable parts inside; you'd probably be better off >customizing subcommands (like install_lib or some of the build_* commands). > > >I don't have the project in front of me right now, but what I needed >to do was to install something non-Python. That is, if the package >gets installed under <prefix>/lib, the extra data gets installed >under <prefix>/data. The data is part of the project, but not part >of the Python package(s). That's not going to work except in the old-style installation mode. With a setuptools or distribute project, your only places to store data are inside the package or in the metadata (e.g. a subdirectory inside .egg-info).

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Re: [Distutils] How to best install pkg_resources?
by P.J. Eby 14 Dec '10

14 Dec '10

At 06:30 PM 12/14/2010 +0100, Arve Knudsen wrote: >Argh :( Can you describe some other way of customizing the install >command that works better with setuptools? That depends on what you're trying to do; but probably it will involve subclassing the install command rather than simply invoking it. What are you trying to customize, anyway? There really aren't many user-serviceable parts inside; you'd probably be better off customizing subcommands (like install_lib or some of the build_* commands).

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egg-links are added to end of sys.path?
by Devin Bayer 14 Dec '10

14 Dec '10

Hello. I have been struggling a bit with using buildout for developing eggs and would appreciate some advice. "." is added to the end of sys.path, so the older version of the package (installed in eggs/) is used instead. If I add the following code, it works. But I feel like I'm missing something and this should not be needed: ====================== [python] initialization = import sys sys.path.insert(0, '.') ====================== Any ideas? Thanks, Devin === my buildout.cfg === [buildout] parts = python develop = . [python] recipe = z3c.recipe.scripts eggs = myegg ======================

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Re: [Distutils] How to best install pkg_resources?
by P.J. Eby 14 Dec '10

14 Dec '10

At 03:33 PM 12/14/2010 +0100, Arve Knudsen wrote: >I found out how to solve it; I need to call >setuptools.command.install.install.do_egg_install, since >setuptools.command.install.install.run will emulate the standard >distutils behaviour unless it's run directly from setup.py :( This >behaviour was hardly obvious I have to say :( Worse news: unless you emulate that same behavior in *your* install class, you will break bdist_rpm, bdist_wininst, bdist_dumb, etc. In other words, all that non-obvious behavior is there for backward compatibility with other distutils commands that invoke "install" as a subcommand. If you test your now-"fixed" setup.py with them, you will find that your project does terribly broken things. (i.e., try "bdist_rpm" or "bdist_wininst" on a simple setup and your more complex project, and compare the results.)

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Re: [Distutils] How to best install pkg_resources?
by P.J. Eby 14 Dec '10

14 Dec '10

At 01:42 PM 12/14/2010 +0100, Arve Knudsen wrote: >Hi > >Using Distribute in my setup.py, how do I best ensure that >pkg_resources gets installed along with my package? I've tried >'install_requires=["setuptools>=0.6"]' as an argument to setup(), >but setuptools didn't get installed. I don't know about Distribute, but it should definitely get installed if you're using setuptools. Under what installation scenario(s) did setuptools *not* get installed?

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How to best install pkg_resources?
by Arve Knudsen 14 Dec '10

14 Dec '10

Hi Using Distribute in my setup.py, how do I best ensure that pkg_resources gets installed along with my package? I've tried 'install_requires=["setuptools>=0.6"]' as an argument to setup(), but setuptools didn't get installed. Thanks, Arve

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Re: [Distutils] custom site_dirs location. Solved
by adso 0000 14 Dec '10

14 Dec '10

Yeah. It was that. In this mail this become clear (http://www.mail-archive.com/distutils-sig@python.org/msg00439.html ) it seems the semi-colons are needed in .pth files, and i was using indentation as in python files. Thank you. --adso On Tue, Dec 14, 2010 at 2:23 AM, P.J. Eby <pje(a)telecommunity.com> wrote: > At 01:54 AM 12/14/2010 +0100, adso 0000 wrote: >> >> Hi, >> i am doing something wrong probably, but when i try to get a custom >> site-packages location in Debian, i need to set the contents of >> altinstall.pth just several line with the absolute paths. >> >> If i use the usual python code with site.addsitedir(....) in > > Are you using "import site; site.addsitedir(...)", or just > "site.addsitedir(...)"? > >

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Re: [Distutils] custom site_dirs location
by P.J. Eby 14 Dec '10

14 Dec '10

At 01:54 AM 12/14/2010 +0100, adso 0000 wrote: >Hi, >i am doing something wrong probably, but when i try to get a custom >site-packages location in Debian, i need to set the contents of >altinstall.pth just several line with the absolute paths. > >If i use the usual python code with site.addsitedir(....) in Are you using "import site; site.addsitedir(...)", or just "site.addsitedir(...)"?

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custom site_dirs location
by adso 0000 14 Dec '10

14 Dec '10

Hi, i am doing something wrong probably, but when i try to get a custom site-packages location in Debian, i need to set the contents of altinstall.pth just several line with the absolute paths. If i use the usual python code with site.addsitedir(....) in altinstall.pth the directories are not added to sys.path. In sitecustomize.py, by other hand, the code works just fine. btw, i've not found any other manner to set a list for site-dirs in distutils.cfg than this: site_dirs = /path/to/dir1,/path/to/dir2 . Any space, tab or quote makes it fail for me :-S Any clue ? Thank you. --adso this works for me, though --- /home/user/opt/lib/python2.6/site-packages/altinstall.pth -- /home/user/opt/lib/python2.6/site-packages-testing3 /home/user/opt/lib/python2.6/site-packages-testing2 --- /home/user/opt/lib/python2.6/distutils/distutils.cfg --- [easy_install] site_dirs =/home/user/opt/lib/python2.6/site-packages-testing2,/home/user/opt/lib/python2.6/site-packages-testing3

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