title: How to increase/reduce the fontsize of x and y tick labels
body: <p>I seem to have a problem in figuring out how to increase or decrease the <code>fontsize</code> of both the x and y tick labels while using <code>matplotlib</code>.</p>
  
  <p>I am aware that there is the <code>set_xticklabels(labels, fontdict=None, minor=False, **kwargs)</code> function, but I failed to understand how to control the <code>fontsize</code> in it. </p>
  
  <p>I expected something somehow explicit, like </p>
  
  <pre><code>title_string=('My Title')
  plt.suptitle(title_string, y=1.0, fontsize=17)
  </code></pre>
  
  <p>but I haven't found anything like that so far. What am I missing?</p>