擅长:python、mysql、java
<p>以下是一些选项:</p>
<pre><code>>>> sum([list1, list2, list3], [])
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
>>> list1 + list2 + list3
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
</code></pre>
<p>理解力强:(其实没必要)</p>
<pre><code>>>> [x for x in sum([list1, list2, list3], [])]
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
</code></pre>