擅长:python、mysql、java
<p>试试<code>collections.Counter()</code>:</p>
<pre><code>import collections
lst = [{'City or Community': 'Augusta', 'State':'GA', 'Parent Company': 'WoW!'},
{'City or Community': 'Augusta', 'State':'GA', 'Parent Company': 'Comcast'}]
cntr = collections.Counter(
[ (d['City or Community'], d['State']) for d in lst ]
)
</code></pre>