擅长:python、mysql、java
<p>您可以使用<a href="https://docs.python.org/3.6/library/heapq.html#heapq.nsmallest" rel="nofollow noreferrer">^{<cd1>}</a>,它应该比排序快一点:</p>
<pre><code>import heapq
import statistics
print(statistics.mean(heapq.nsmallest(4, w)))
</code></pre>