擅长:python、mysql、java
<p>您所参考的用户指南(<a href="https://pandas.pydata.org/pandas-docs/stable/user_guide/advanced.html#basic-indexing-on-axis-with-multiindex" rel="nofollow noreferrer">this</a>)部分是针对数据帧的列是多索引的情况。当索引为多索引时,您应该查看此<a href="https://pandas.pydata.org/pandas-docs/stable/user_guide/advanced.html#advanced-indexing-with-hierarchical-index" rel="nofollow noreferrer">part</a></p>
<p>要访问<code>bar</code>,您应该执行以下操作:</p>
<pre><code>print(df.loc["bar"])
</code></pre>