using scipy in django with apache and mod_wsgi

In your WSGI file you will have something that looks like this:

<VirtualHost>
    ...
    WSGIScriptAlias / /somepath/deployment/wsgi/yoursite.wsgi
</VirtualHost>

You need to add the following line:

<VirtualHost>
    ...
    WSGIScriptAlias / /somepath/deployment/wsgi/yoursite.wsgi
    WSGIApplicationGroup %{GLOBAL}
</VirtualHost>

The explanation for that can be found here:

http://mail.scipy.org/pipermail/scipy-user/2011-November/031014.html