擅长:python、mysql、java
<pre><code>from collections import Counter
from operator import itemgetter
items = [
{"bla": "this"},
{"bla": "this"},
{"bla": "that"},
{"bla": "that"},
{"bla": "that"},
{"bla": "that"},
{"bla": "this"},
{"bla": "that"}
]
counter = Counter(map(itemgetter("bla"), items))
print(counter["this"])
print(counter["that"])
</code></pre>
<p>输出:</p>
<pre><code>3
5
>>>
</code></pre>