擅长:python、mysql、java
<p>因为单列不需要<code>apply</code>,所以我们需要将其重新分配</p>
<pre><code>max = discrepancies['Volume'].max()
discrepancies['some col']=discrepancies['Volume']/max
</code></pre>
<p>你也可以使用地图</p>
<pre><code>max = discrepancies['Volume'].max()
discrepancies['Volume'].map(lambda x: x/max)
</code></pre>