2012-11-07

How to create a virtual environment that also uses global modules

Last weekend I upgraded my Mac to Mountain Lion. I installed Python 2.7 with PIL and MySQLdb and virtualenv using MacPorts.

When I created and activated a virtual environment with

cd myproject
virtualenv .
. bin/activate

the PIL and MySQLdb modules were unrecognizible in that environment. What I needed was just different Django versions in my virtual environments, but MySQLdb and PIL libraries had to be shared.

After a quick search I found an additional parameter for the creation of virtual environment:

virtualenv --system-site-packages .

With this parameter I could use my global modules within the virtual environment.

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3 comments:

  1. bmihelacWednesday, November 07, 2012 8:15:00 PM

    When using virtualenvwrapper, check add2virtualenv command to add specified packages:

    http://virtualenvwrapper.readthedocs.org/en/latest/command_ref.html#add2virtualenv

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  2. eng. Ilian IlievThursday, November 08, 2012 1:40:00 PM

    The reason for this is that in the latest version of virtualenv the --no-site-packages flag it set by default.

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  3. Aidas Bendoraitis a.k.a. archatasThursday, November 08, 2012 4:05:00 PM

    Good to know!

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