title: How do I insert a list at the front of another list?
body: <pre><code>&gt;&gt;&gt; a = ['foo.py']
  &gt;&gt;&gt; k = ['nice', '-n', '10'] 
  &gt;&gt;&gt; a.insert(0, k)
  &gt;&gt;&gt; a
  [['nice', '-n', '10'], 'foo.py']
  </code></pre>
  
  <p>I want to list <code>k</code> to be on the same level as <code>foo.py</code>, rather than a sublist.</p>