擅长:python、mysql、java
<p>试试<code>groupby</code>:</p>
<pre><code>>>> df.groupby('fName', as_index=False).apply(lambda x: x.mode()).reset_index(level=1).iloc[:, 1:]
fName lName smokes eye_color
0 Bob McCain 1 black
1 Ryan Diedre 0 brown
>>>
</code></pre>