title: Slicing a list from the end
body: <p>Say, I have a list of values:</p>
  
  <pre><code>&gt;&gt;&gt; a = [1, 2, 3, 4]
  </code></pre>
  
  <p>How can I make it include the end value through slicing? I expected:</p>
  
  <pre><code>&gt;&gt;&gt; a[4:]
  [4]
  </code></pre>
  
  <p>instead of:</p>
  
  <pre><code>&gt;&gt;&gt; a[4:]
  []
  </code></pre>