mapping two list
<p>I have two list like this:</p>

<pre><code>list1 = [{'id':1, 'name':'foo', 'age':20}, {'id':2, 'name':'foo', 'age':20}]

list2 = [{'id':2, 'created':'2004-12-23'}, {'id':12, 'created':'2004-12-23'}, 
         {'id':1, 'created':'2004-12-23'}]

list1 = [{'id':1, 'name':'foo', 'age':20, 'match':True}, 
         {'id':2, 'name':'foo', 'age':20, 'match':True}]
</code></pre>

<p>I want to add match to the corresponding list if the id of list1 and list2 matches. How would I do that efficiently?</p>
