Python Remove dict items with duplicate field
<p>I have the following list of dicts. I'd like to remove duplicates of the object field. What's the easiest way to to remove the item if that object has already appeared?</p>

<pre><code>[{'date': datetime.datetime(2012, 2, 12, 21, 42, 54, 634699),
  'object': &lt;Subscription: Subscription object&gt;,
  'subscription': &lt;Subscription: Subscription object&gt;,
  'type': 'subscription'},
 {'date': datetime.datetime(2012, 2, 12, 21, 25, 51, 51554),
  'object': &lt;Subscription: Subscription object&gt;,
  'subscription': &lt;Subscription: Subscription object&gt;,
  'type': 'subscription'},
 {'date': datetime.datetime(2012, 2, 12, 20, 59, 18, 211191),
  'object': &lt;Subscription: Subscription object&gt;,
  'subscription': &lt;Subscription: Subscription object&gt;,
  'type': 'subscription'},
 {'date': datetime.datetime(2012, 2, 12, 18, 1, 37, 43482),
  'object': &lt;Subscription: Subscription object&gt;,
  'subscription': &lt;Subscription: Subscription object&gt;,
  'type': 'subscription'},
 {'date': datetime.datetime(2012, 2, 12, 18, 1, 24, 322306),
  'object': &lt;TipList: mulligan - Buenos Aires&gt;,
  'subscription': &lt;Subscription: Subscription object&gt;,
  'type': 'tiplist'},
 {'date': datetime.datetime(2012, 2, 9, 23, 33, 17, 511657),
  'object': &lt;TipList: mulligan - Buenos Aires&gt;,
  'subscription': &lt;Subscription: Subscription object&gt;,
  'type': 'tiplist'},
 {'date': datetime.datetime(2012, 2, 7, 16, 18, 51, 597775),
  'object': &lt;TipList: mulligan - Buenos Aires&gt;,
  'subscription': &lt;Subscription: Subscription object&gt;,
  'type': 'tiplist'},
  'object': &lt;TipList: mulligan - Buenos Aires&gt;,
  'subscription': &lt;Subscription: Subscription object&gt;,
  'type': 'tiplist'},
 {'date': datetime.datetime(2012, 2, 7, 10, 9, 12, 975944),
  'object': &lt;TipList: mulligan - Buenos Aires&gt;,
  'subscription': &lt;Subscription: Subscription object&gt;,
  'type': 'tiplist'},
 {'date': datetime.datetime(2012, 1, 19, 20, 37, 26, 663267),
  'object': &lt;TipList: a - Buenos Aires&gt;,
  'subscription': &lt;Subscription: Subscription object&gt;,
  'type': 'tiplist'}]
</code></pre>
