title: Hide tick label values but keep axis labels
body: <p>I have this image:</p>
  
  <pre><code>plt.plot(sim_1['t'],sim_1['V'],'k')
  plt.ylabel('V')
  plt.xlabel('t')
  plt.show()
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/jU1uJ.png" rel="noreferrer"><img src="https://i.stack.imgur.com/jU1uJ.png" alt="enter image description here"></a></p>
  
  <p>I want to hide the numbers; if I use:</p>
  
  <pre><code>plt.axis('off')
  </code></pre>
  
  <p>...I get this image:</p>
  
  <p><a href="https://i.stack.imgur.com/gur0P.png" rel="noreferrer"><img src="https://i.stack.imgur.com/gur0P.png" alt="enter image description here"></a></p>
  
  <p>It also hide the labels, <code>V</code> and <code>t</code>. How can I keep the labels while hiding the values?</p>