title: ImportError: No module named 'matplotlib._cntr'
body: <p>When I run</p>
  
  <pre><code>#!/usr/bin/env python
  import matplotlib 
  import matplotlib.pyplot as plt
  </code></pre>
  
  <p>I get following error</p>
  
  <pre><code>Traceback (most recent call last):
  File "/home/wayne/alphaWorldsPython/code/mapTest.py", line 12, in &lt;module&gt;
       import matplotlib.pyplot as plt
  File "/home/wayne/matplotlib/pyplot.py", line 32, in &lt;module&gt;
      import matplotlib.colorbar
  File "/home/wayne/matplotlib/colorbar.py", line 36, in &lt;module&gt;
      import matplotlib.contour as contour
  File "/home/wayne/matplotlib/contour.py", line 14, in &lt;module&gt;
      import matplotlib._cntr as _cntr
  ImportError: No module named 'matplotlib._cntr'
  </code></pre>
  
  <p>When I look in matplotlib indeed ._cntr is not present.
  I have tried reinstalling and updating.  No change.</p>