擅长:python、mysql、java
<p>你可以的</p>
<pre><code>In [279]: df['Vehicle_Color'] = df.groupby('Owner')['Vehicle_Color'].transform(
lambda x: 'Red' if 'Red' in list(x) else x)
In [280]: df
Out[280]:
Owner Vehicle_Color
0 James Red
1 Peter Green
2 James Red
3 Sally Blue
4 Steven Red
5 James Red
6 James Red
7 Peter Blue
</code></pre>