擅长:python、mysql、java
<p>下面是一个使用字典将元素从<code>alist</code>映射到<code>blist</code>对应元素之和的想法。你知道吗</p>
<pre><code>>>> alist = [1,4,1,2,1]
>>> blist = [6,7,8,9,5]
>>> d = {}
>>> for a,b in zip(alist, blist):
... d[a] = d.get(a, 0) + b
...
>>> [d[x] for x in sorted(d)]
[19, 9, 7]
</code></pre>