title: Python3 can't find and import PyQt5
body: <p>I installed PyQt5 with brew and it appears to end up the install process properly.</p>
  
  <pre><code>$ brew install pyqt5 --with-python3
  </code></pre>
  
  <p>The problem is that I can't get it to import:</p>
  
  <pre><code>Python 3.4.3 (v3.4.3:9b73f1c3e601, Feb 23 2015, 02:52:03) 
  [GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
  Type "help", "copyright", "credits" or "license" for more information.
  &gt;&gt;&gt; import PyQt5
  Traceback (most recent call last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
  ImportError: No module named 'PyQt5'
  </code></pre>
  
  <p>Where do I start looking to find out why its not working? I thought it would add it automatically to Python using the brew commmand that I used. </p>