title: Python sublist for a condition
body: <p>I have 3 lists <code>x</code>, <code>y</code>, <code>z</code> and I plot them with:</p>
  
  <pre><code>ax.plot3D(x, y, z, linestyle = 'None', marker = 'o').
  </code></pre>
  
  <p>What is the easiest way to only plot the points where <code>x &gt; 0.5</code>?</p>
  
  <p>(my problem is how to define a sublist under a condition without making a for loop on that list).</p>