title: python module not found even after installation
body: <pre><code>(venv) [root@z1 myproject]# ./tst.py
  
  3.5.1 (default, Jul 13 2016, 08:50:23)
  
  [GCC 4.4.7 20120313 (Red Hat 4.4.7-16)]
  
  Traceback (most recent call last):
  
    File "./tst.py", line 5, in &lt;module&gt;
  
      from tabulate import tabulate
  
  ImportError: No module named 'tabulate'
  
  (venv) [root@z1 myproject]#
  
  
  (venv) [root@z1 myproject]# python
  
  Python 3.5.1 (default, Jul 13 2016, 08:50:23)
  
  [GCC 4.4.7 20120313 (Red Hat 4.4.7-16)] on linux
  
  Type "help", "copyright", "credits" or "license" for more information.
  
  .&gt;&gt;&gt; from tabulate import tabulate
  
  .&gt;&gt;&gt;
  </code></pre>