擅长:python、mysql、java
<p>尝试:</p>
<pre><code>result = pd.merge(data1[['REGION', 'TOTALDEMAND', 'RRP','SETTLEMENTDATE']], data2[['REGION', 'TOTALDEMAND', 'RRP','SETTLEMENTDATE']], on='SETTLEMENTDATE')
</code></pre>
<p>您正在<code>SETTLEMENTDATE</code>上进行合并,但在您正在合并的数据帧的片中没有相同的内容。你知道吗</p>