title: Why this Python expression doesn't produce expected result?
body: <p>This code snippet:</p>
  
  <pre><code>a = [3, 2, 1]
  a.sort()
  </code></pre>
  
  <p>produces <code>[1, 2, 3]</code> list. Why</p>
  
  <pre><code>[3, 2, 1].sort()
  </code></pre>
  
  <p>doesn't produce the same result? Is there a "one-liner" to accomplish this?</p>