title: django.fcgi or virtualenv : no module named operator
body: <h1>So these are my website informations:</h1>
  
  <ul>
  <li>framework : Django</li>
  <li>hosting : alwaysdata</li>
  <li>python : 2.7</li>
  <li>virtualenv is used</li>
  </ul>
  
  <hr>
  
  <h1>The problem :</h1>
  
  <p>I have the non explicit 500 error :<pre>Internal Server Error</pre></p>
  
  <p>I have not any error log</p>
  
  <h2>But :</h2>
  
  <p>I found a trail to solve this issue. Indeed when i run manually the django.fcgi, i got this traceback:</p>
  
  <pre>
  Traceback (most recent call last):
    File "public/django.fcgi", line 14, in 
      from django.core.servers.fastcgi import runfastcgi
    File "/home/usr/.virtualenvs/thevirtualenv/lib/python2.7/site-packages/django/core/servers/fastcgi.py", line 17, in 
      from django.utils import importlib
    File "/home/usr/.virtualenvs/thevirtualenv/lib/python2.7/site-packages/django/utils/importlib.py", line 4, in 
      from django.utils import six
    File "/home/usr/.virtualenvs/thevirtualenv/lib/python2.7/site-packages/django/utils/six.py", line 23, in 
      import operator
  ImportError: No module named operator
  </pre>
  
  <hr>
  
  <h1>Manipulation(s) which could occur this issue :</h1>
  
  <p>I had this issue for 3 week ago, i let it rest too long, so now i can't remember what i have done to bring about this.. But i think it was a dirty virtualenv creation or edition, something like that..</p>
  
  <p>Thanks to bear with my english. </p>
  
  <p>Does anyone have an Idea about my case?</p>
  
  <h1>Attempts to solve this issue:</h1>
  
  <p>I just tried to recreate my virtualenv and got this error message :</p>
  
  <pre>
  Traceback (most recent call last):
    File "/home/usr/python/python27/bin/virtualenv", line 5, in 
      from pkg_resources import load_entry_point
  zipimport.ZipImportError: can't decompress data; zlib not available
  </pre>