擅长:python、mysql、java
<h2>选项1</h2>
<p>你可以对索引排序,然后切片</p>
<pre><code>frame.sort_index(axis=1, level=1)[['DARK', 'ANTS', 'TWO']]
DARK ANTS TWO
thing1 thing1 thing3 thing1 thing4
0 0.1 a a 1 1
1 0.2 e e 2 2
2 1.0 i i 3 3
3 2.0 o o 4 4
</code></pre>
<hr/>
<h2>方案2</h2>
<p>将列的第一级设置为按顺序排序的列</p>
^{pr2}$