擅长:python、mysql、java
<p>这是你的答案吗</p>
<pre><code>from collections import Counter
d=[{'key1': 'valueA', 'key2': 'valueB'}, {'key1': 'valueC', 'key3': 'valueD'}, {'key1': 'valueC'}]
keys=[]
for i in d:
for j in i.keys():
keys.append(j)
Counter(keys)
</code></pre>
<p>输出</p>
<pre><code>Counter({'key1': 3, 'key2': 1, 'key3': 1})
</code></pre>