Delete some elements from List inside a List at Python
<p>The list: </p>

<pre><code>L=[('true','500'),('false','600'),('true','6500'),('true','4567')]
</code></pre>

<p>I want to delete the <code>True</code> and <code>False</code> elements, so I have the list <code>L</code> like:</p>

<pre><code>L=['500','600','6500','4567']
</code></pre>