title: How do I animate the ticks on the x-axis?
body: <p>I have a <code>matplotlib</code> <code>axes</code> instance inside which I'm animating an <code>AxesImage</code> via <code>blit</code>ting.</p>
  
  <p>What I'd like to do is animate the ticks on the x-axis as well.
  I am updating the data on the AxesImage (and subsequently) drawing its artist quite frequently, and on each update I'd like to move one extra tick placed to highlight the position of something.
  This is what I'm doing right now:</p>
  
  <pre><code>axis = axes.get_xaxis
  im.set_data(new_data)
  axis.set_ticks([10,20,30,x,t])
  axis.set_ticklabels(["p", "u", "z", "z", "i"])
  axes.draw_artist(im)
  axes.draw_artist(axis)
  </code></pre>
  
  <p>While I see the ticks correctly updating, the labels are not. I think that the axes bbox does not include the axes, is this possible? If so, how can I animate it? Should I copy and restore from somewhere else?</p>