擅长:python、mysql、java
<p>方法1:</p>
<pre><code>df.xs('A', level='Col', axis=1)
</code></pre>
<p>有关详细信息,请参阅<a href="http://pandas.pydata.org/pandas-docs/stable/advanced.html#cross-section" rel="noreferrer">http://pandas.pydata.org/pandas-docs/stable/advanced.html#cross-section</a></p>
<p>方法2:</p>
<pre><code>df.loc[:, (slice(None), 'A')]
</code></pre>
<p><strong>注意:</strong>此方法要求对标签进行排序。有关详细信息,请参阅<a href="http://pandas.pydata.org/pandas-docs/stable/advanced.html#the-need-for-sortedness-with-multiindex" rel="noreferrer">http://pandas.pydata.org/pandas-docs/stable/advanced.html#the-need-for-sortedness-with-multiindex</a></p>