title: How can I remove the top and right axis in matplotlib?
body: <p>Instead of the default "boxed" axis style I want to have only the left and bottom axis, i.e.:</p>
  
  <pre><code>+------+         |
  |      |         |
  |      |   ---&gt;  |
  |      |         |
  +------+         +-------
  </code></pre>
  
  <p>This should be easy, but I can't find the necessary options in the docs.</p>