擅长:python、mysql、java
<p>请测试它:</p>
<pre><code>from collections import defaultdict
x = defaultdict(list)
d = {'a': ['1.json', '1.html', '1.csv'], 'B': ['2.json', '2.html', '2.csv']}
for k, v in d.items():
for i in v:
if i.split('.')[-1] in ['csv', 'json']:
x[k].append(i)
print(dict(x))
</code></pre>