title: Matplotlib colorbar ticks on left/opposite side
body: <p>One could generate a vertical colorbar like so(simplified):</p>
  <pre><code>import matplotlib.pyplot as plt
  import matplotlib as mpl
  
  plt.figure()
  c_ax=plt.subplot(111)
  cb = mpl.colorbar.ColorbarBase(c_ax,orientation='vertical')
  plt.savefig('my_colorbar.png')
  </code></pre>
  <p>Resulting in something like this(rotated for space reasons):<a href="https://i.stack.imgur.com/sE0YP.png" rel="noreferrer"><img src="https://i.stack.imgur.com/sE0YP.png" alt="enter image description here" /></a></p>
  <p>Is it possible to get the ticks labels on the opposite side?</p>