擅长:python、mysql、java
<p>IIUC公司</p>
<pre><code>df.melt('COMMON').assign(variable=lambda x : x['variable'].str.rstrip('_')).\
groupby(['COMMON','variable']).value.std().unstack()
Out[18]:
variable A B
COMMON
a 3.593976 2.217356
b 3.593976 2.081666
</code></pre>