title: Convert class to Python list
body: <p>I can't convert a simple <code>[0, 20, 0, 20, 0, 20]</code> to a <code>list</code>.</p>
  
  <p><strong>Code:</strong></p>
  
  <pre><code>geo = hou.pwd().geometry()
  
  print geo.boundingBox()
  print type(geo.boundingBox())
  </code></pre>
  
  <p><strong>Output:</strong></p>
  
  <pre><code>[0, 20, 0, 20, 0, 20]
  &lt;class 'hou.BoundingBox'&gt;
  </code></pre>
  
  <p>Test:</p>
  
  <pre><code>list(geo.boundingBox())
  len(geo.boundingBox())
  </code></pre>
  
  <p>I get the following error:</p>
  
  <pre><code>object BoundingBox is not iterable.
  Object of type 'BoundingBox' has no len()
  </code></pre>
  
  <p>I read all the related questions but they don't seem to solve my problem.</p>