擅长:python、mysql、java
<pre><code>result = collections.defaultdict(list)
for res in response:
result[res['b_id']].append(res['a_id'])
</code></pre>
<blockquote>
<p>result:</p>
<pre><code>defaultdict(list,
{'0d687c94c5f4': ['12345', '67890'],
'9ec34be3d535': ['23857', '84596'],
None: ['d82ebe9815cc']})
</code></pre>
</blockquote>