擅长:python、mysql、java
<p>您可以分组,然后制作零件列表</p>
<pre><code>df = df.groupby(['make', 'year', 'model', 'engine'])['part'].apply(','.join).reset_index()
</code></pre>
<p>样本输出:</p>
<pre><code> make year model engine part
0 alfa romeo 1957 giulietta 1.3l l4 B,A
1 alfa romeo 1958 giulietta 1.3l l4 B,A
2 alfa romeo 1960 giulietta 1.3l l4 A
</code></pre>