擅长:python、mysql、java
<p>找到<code>idxmax</code>,然后将数据合并回原始帧:</p>
<pre><code>df.set_index('name').groupby(['state_dist'], as_index=False)['disbursements'].idxmax()\
.merge(df, right_on=['name', 'state_dist'],
left_on=['disbursements', 'state_dist'])
</code></pre>