title: How to change font properties of a matplotlib colorbar label?
body: <p>In matplotlib, I want to change the font properties for a <code>colorbar</code> label. For example I want the label to appear bold.</p>
  
  <p>Here is some example code:</p>
  
  <pre><code>from matplotlib.pylab import *
  pcolor(arange(20).reshape(4,5))
  cb = colorbar(label='a label')
  </code></pre>
  
  <p>and the result, where I want <em>"a label"</em> to appear bold:</p>
  
  <p><img src="https://i.imgur.com/k2CIhpp.png" alt="output plot"></p>
  
  <p>All other answers on this site only answer how to change <code>ticklabels</code> or change all fonts in general (via modification of the <code>matplotlibrc</code> file)</p>