How to add a list to the first position of a list in Python : <p>I want to add a list to the first position of a list.
I have used <code>insert(0, [])</code> but it didn't work.</p>

<p>For exemple, </p>

<pre><code>my_array = [['a1', 'a2', 'a3'],
         ['a4', 'a5', 'a6'],
         ['a7', 'a8', 'a9'],
         ['a10', 'a11', 'a12', 'a13', 'a14']].
</code></pre>

<p>and i want to add <code>[ 1, 2, 3]</code> to the first position of my_array.
Thanks for the help.</p>
