title: How to count occurrences of specific dict key in list of dicts
body: <p>I'm trying to count the number of times a specified key occurs in my list of dicts. I've used <code>Counter()</code> and <code>most_common(n)</code> to count up all the keys, but how can I find the count for a specific key? I have this code, which does not work currently:</p>
  
  <pre><code>def Artist_Stats(self, artist_pick):
  
      entries = TopData(self.filename).data_to_dict()
  
      for d in entries:
          x = d['artist']
          find_artist = Counter()
          print find_artist[x][artist_pick]
  </code></pre>
  
  <p>The "entries" data has about 60k entries and looks like this:</p>
  
  <pre><code>[{'album': 'Nikki Nack', 'song': 'Find a New Way', 'datetime': '2014-12-03 09:08:00', 'artist': 'tUnE-yArDs'},]
  </code></pre>