擅长:python、mysql、java
<p><strong>选项1</strong><br/>
在字典理解中使用<code>pd.concat</code></p>
<pre><code>pd.concat({k: df[v] for v, l in ref_dict.items() for k in l}, axis=1)
entity2_exp1 entity2_exp2 entity3_exp1 entity3_exp2 entity3_exp3 entity_exp1
id
json present present absent absent absent present
molly present present absent absent absent absent
tina present present absent absent absent absent
jake absent absent present present present present
molly absent absent absent absent absent present
</code></pre>
<p><strong>选项2</strong><br/>
切片数据帧并重命名列</p>
^{pr2}$