title: PyQT5 error: could not find or load Qt platform plugin xcb
body: <p>Up until <code>Anaconda3</code> (which contains <code>Python 3.4</code>) was re-installed on my <code>RedHat 6.5</code> workstation, I have been able to develop Python apps that use <code>PyQT5</code>.</p>
  
  <p>Post re-install of <code>Anaconda</code> I receive an error message: </p>
  
  <blockquote>
    <p>....could not find or load Qt platform plugin xcb</p>
  </blockquote>
  
  <p>The only difference between Anaconda installs is the folder name: <code>/usr/local/ananaconda3</code> vs <code>/usr/local/anaconda_py3</code></p>
  
  <p>I checked <code>libqxcb.so</code> has no missing dependencies.
  I rebuilt <code>PyQT5</code>.
  I tried explicitly adding location of <code>site-packages</code> of <code>PyQT5</code>:</p>
  
  <pre><code>import site
  site.addsitedir("...path.../python3.4")
  </code></pre>
  
  <p>Any other suggestions?</p>
  
  <p>How does re-installing <code>Python</code> impact the use of <code>PyQT5</code>?</p>