How can I find the locations of an item in a Python list of lists?
<p>I want to find the location(s) of a specific item in a list of lists.  It should return a list of tuples, where each tuple represents the indexes for a specific instance of the item.  For example:</p>

<pre><code>list = [['1', '2', '4', '6'], ['7', '0', '1', '4']]
getPosition('1')  #returns [(0, 0), (1, 2)]
and getPosition('7') #returns [(1,0)]
</code></pre>
