擅长:python、mysql、java
<p>使用<a href="https://docs.python.org/3.7/library/collections.html#collections.defaultdict" rel="nofollow noreferrer">^{<cd1>}</a>:</p>
<pre><code>from collections import defaultdict
d = defaultdict(int)
for item in result_text_one_json:
d[item['userId']] += 1
</code></pre>
<p>最后<code>d</code>将是一个字典,用户id作为它的键,每个消息的计数作为它的值。你知道吗</p>
<p>演示:</p>
<pre><code>In [28]: from collections import defaultdict
...:
...: d = defaultdict(int)
...: for item in result_text_one_json:
...: d[item['userId']] += 1
...:
In [29]: d
Out[29]:
defaultdict(int,
{1: 10,
2: 10,
3: 10,
4: 10,
5: 10,
6: 10,
7: 10,
8: 10,
9: 10,
10: 10})
</code></pre>