擅长:python、mysql、java
<p>使用字典理解,其中<code>items</code>在元组对列表中:</p>
<pre><code>data = {i:[int(b) for a, b in items if a == i] for i in set(a for a, b in items)}
data = {a:int(float(sum(b))/float(len(b))) for a, b in data.items()} # averages
</code></pre>