title: Treemap visualization in Python
body: <p>I'm interested in drawing a <a href="http://en.wikipedia.org/wiki/Treemapping" rel="noreferrer">treemap</a>:</p>
  
  <p><img src="https://i.stack.imgur.com/4wb1q.png" alt="treemap example"></p>
  
  <p>What is the easiest way to make one in Python? Is there a library that could produce such a graphic, given the proper input data?</p>