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how can I change the default version mod_wsgi uses?

I am using Debian 5 with Apache 2.

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3 Answers 3

Reset to default
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Look for /usr/lib/apache2/modules/mod_wsgi.so*, at least on ubuntu I have:

/usr/lib/apache2/modules/mod_wsgi.so -> mod_wsgi.so-2.6
/usr/lib/apache2/modules/mod_wsgi.so-2.5
/usr/lib/apache2/modules/mod_wsgi.so-2.6

If you change the symlink, you change the default mod_wsgi.

An alternative is to look in /etc/apache2/mods-enabled/wsgi.load, for me that's just one line:

LoadModule wsgi_module /usr/lib/apache2/modules/mod_wsgi.so

If you point that at one of those mod_wsgi.so-2.x files, you've changed the default version.

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When you say different version you mean Python 2.5 vs 2.6, then you must install mod_wsgi package binary compiled against Python 2.5, or compile mod_wsgi from source code yourself against the Python 2.5 version. See notes about --with-python option in:

http://code.google.com/p/modwsgi/wiki/QuickInstallationGuide#Configuring_The_Source_Code

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you should look into using virtualenv. I think that is what you are looking for

http://code.google.com/p/modwsgi/wiki/VirtualEnvironments

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  • Is it possible to create virtualenv with higher Python version than system has?
    – Etam
    Jul 6, 2010 at 23:39
  • yes.. i do it for hosting Django apps on redhat el 5 that only has 2.4.. I run 2.6 in virtualenv. You just have to install it on the system as an option
    – Mike
    Jul 7, 2010 at 12:38
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    Virtual environments can only be used for the same version of Python as mod_wsgi was compiled for. You cannot have mod_wsgi compiled against Python 2.4 and then create a virtual environment for Python 2.6 and point mod_wsgi at it. Python 2.4 will still be what actually runs. In the mean time you are potentially mixing Python code/extension modules from a different version of Python, which can cause all manner of problems or crashes.
    – Graham Dumpleton
    Aug 29, 2010 at 23:28

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