擅长:python、mysql、java
<p>您可以使用<a href="https://docs.python.org/3/library/itertools.html#itertools.groupby" rel="nofollow noreferrer">^{<cd1>}</a>将子列表按字母分组,并在每个组中查找最大值:</p>
<pre><code>from operator import itemgetter as g
from itertools import groupby
[max(v, key=g(1)) for k, v in groupby(l, g(0))]
# [['a', 3], ['b', 7], ['c', 30]]
</code></pre>