擅长:python、mysql、java
<p>对2列<code>DataFrame</code>使用<a href="http://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.Series.reset_index.html" rel="nofollow noreferrer">^{<cd1>}</a>,然后从列表中设置新列名称:</p>
<pre><code>top3_country = top3_country.reset_index()
top3_country.columns = ['Countries', 'Visitors']
</code></pre>
<p>或者将<a href="http://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.Series.rename_axis.html" rel="nofollow noreferrer">^{<cd3>}</a>与<a href="http://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.Series.reset_index.html" rel="nofollow noreferrer">^{<cd1>}</a>一起使用:</p>
<pre><code>top3_country = top3_country.rename_axis('Countries').reset_index(name='Visitors')
</code></pre>