Delete duplicates in list structure (python)
<p>I have the following structure in python:</p>

<pre><code>revisions = [
['01.02.2010','abc','qwe'],
['02.02.2010','abc','qwe'],
['03.02.2010','aaa','qwe'],
['04.02.2010','aaa','qwe'],
['05.02.2010','aaa','qwe'],
['06.02.2010','aaa','dsa'],
]
</code></pre>

<p>how can i remove the duplicates with minimum algorithmic complexity? Output example:</p>

<pre><code> revisions = [
['01.02.2010','abc','qwe'],
['03.02.2010','aaa','qwe'],
['06.02.2010','aaa','dsa'],
</code></pre>

<p>]</p>

<p>EDIT: the list is already ordered by date.
EDIT2: Fixed example
Thanks in advance!</p>
