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I have an custom install of python 2.7 /opt/python7.2/ built from source using the following flags: ./configure --prefix=/opt/python-2.7/ --enable-shared and make altinstall; make install on a RHEL 6.2 and RHEL 5.5 with a few 3rd party modules (Numpy, SciPy and all supporting libs) installed in the python site-packages dir.

I have no issues importing these 3rd party packages if I run python with the non root user that I installed them with, nor with root. This is tested by importing numpy and then testing with numpy.test("full") However if I try importing these same packages as a different user I get an error saying that the module doesn't exist.

I have traced the issue down to the site-package permissions set to 700. I can change the sit-packages to -R 755 * and import and numpy and try run the tests but I find that there are now a bunch of python imports that fail, this is also due to the 700 permissions. But when i -R 755 * at /opt/python2.7 ... nothing works

I have looked all over the internet for an answer for the following two questions: 1/ is there a flat that I am missing at python build || python install 2/ what folders can I change to 755 so that these 3rd party modules will run?


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Please be more specific. Tell the exact paths where everything resides and PYTHONPATH for both users. –  ivan_pozdeev Mar 4 '12 at 4:54
install dir for 3rd party packages /opt/python-2.7/lib/python2.7/site-packages/ this dir and everything under it is 600 when I "chmod -R 755 /opt/python-2.7/lib/python2.7/site-packages/" the tests stop working /opt/python-2.7/lib/python2.7/site-packages/scipy /opt/python-2.7/lib/python2.7/site-packages/nose /opt/python-2.7/lib/python2.7/site-packages/numpy –  Jason Mar 5 '12 at 15:43
I installed python with: make altinstall and reinstall just numpy, but the same issue. (will not run with a diff user and when i 755 the site-packagers it stops working) –  Jason Mar 5 '12 at 18:54
Does the 1st user install packages to /opt/python-2.7/lib/python2.7/site-packages/ as well? Regular users don't have write access there as a rule; the modules are likely put somewhere under the 1st user's home directory. And still, what is PYTHONPATH for both users? BTW use backticks (`) for fixed-width font. –  ivan_pozdeev Mar 5 '12 at 20:02
How did you install modules as a non-root user in the 1st place? disutils? setuptools? plain file copy? –  ivan_pozdeev Mar 6 '12 at 18:42

1 Answer 1

Testing shows that chown -R 755 /opt/python2.7/ in fact breaks numpy tests. I'd say it's a bug unless they have strong reasons. Quick code check didn't reveal the cause and there's no quick way to find out which files need which permissions. So I suggest to:

1) Change user1's umask with umask 022 (will only apply to current session; to change it permanently, add it to bash configuration files) so it creates files with 644/755 permissions.

2) rm -rf /opt/python2.7 and reinstall python the same way. BTW, "make altinstall" step is redundant.

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Thanks Ivan, in the middle of reinstalling now. thanks as well for the make altinstall –  Jason Mar 9 '12 at 21:23
thank you very much Ivan. It is now working. One other note, if using nose to run the tests it is safe to go into the nose dir and -R 755* –  Jason Mar 12 '12 at 14:21

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