擅长:python、mysql、java
<p>您可以使用<code>defaultdict</code>:</p>
<pre><code>from collections import defaultdict
l = [("xyz",100),("tao",90),("quinee",100)]
d = defaultdict(list)
for i in l:
d[i[1]].append(i[0])
r = [(j, i) for i, j in d.items()]
print(r)
# [(['tao'], 90), (['xyz', 'quinee'], 100)]
</code></pre>