title: Get indices of the top N values of a list
body: <p>I have a list say <code>a = [5,3,1,4,10]</code>. I need to get indices of the top two values of the list, that is for <code>5</code> and <code>10</code> I would get <code>[0, 4]</code>. Is there a one-liner that Python offers for such a case?</p>