擅长:python、mysql、java
<p><a href="https://kite.com/python/docs/collections.defaultdict" rel="nofollow noreferrer">^{<cd1>}</a>可能是解决这个问题的好方法</p>
<pre><code>from collections import defaultdict
d = defaultdict(list)
a = [{"from": "Location1", "to": "Location2"}, {"from": "Location1", "to": "Location3"},
{"from": "Location1", "to": "Location4"}, {"from": "Location1", "to": "Location5"}]
for o in a:
d[o['from']].append(o['to'])
print(d)
</code></pre>