title: Restore left ticks in matplotlib
body: <p>I have a question similar to:
  <a href="https://stackoverflow.com/questions/10354397/python-matplotlib-y-axis-labels-on-right-side-of-plot">Python Matplotlib Y-Axis ticks on Right Side of Plot</a></p>
  
  <p>I fixed the problem of putting y-axis ticklabels on the right side of the plot, but I would like to restore y ticks on the left side too.</p>
  
  <p>I tried with:</p>
  
  <pre><code>yax.set_ticks_position('both')
  </code></pre>
  
  <p>but I get:</p>
  
  <pre><code>ax0.set_ticks_position('both')
  AttributeError: 'AxesSubplot' object has no attribute 'set_ticks_position'
  </code></pre>
  
  <p>How can I solve this problem?</p>