title: django: Setting environment variables in /etc/apache2/envvar is not working
body: <p>I have a Django <code>(v1.11.6)</code> app on my Ubuntu server having <code>Python 3.5 (not using virtualenv)</code>.</p>
  
  <p>However, I want to set environment variables in mod_wsgi for Django.</p>
  
  <p>Since I'm not using <code>virtualenv</code> I set then in <code>/etc/apache2/envvar</code>. But <code>apache2</code> service can't get them.</p>
  
  <p>In settings.py I have <code>SECRET_KEY = get_env_variable("GA_SECRET_KEY")</code> but apache raises the following error:</p>
  
  <pre><code>[Mon Oct 23 14:03:29.180611 2017] [wsgi:error] [pid 30062] [client 194.42.16.145:13576]     SECRET_KEY = os.environ("GA_SECRET_KEY")
  [Mon Oct 23 14:03:29.180630 2017] [wsgi:error] [pid 30062] [client 194.42.16.145:13576] TypeError: '_Environ' object is not callable
  </code></pre>
  
  <p>Do you know how to fix this?</p>