擅长:python、mysql、java
<p>简单的重新分配就可以做到:</p>
<pre><code>df.loc['JSE', 'OML'] = df.loc['JSE', 'OML'].apply(np.sqrt)
</code></pre>
<p>要玩的完整代码:</p>
^{pr2}$
<p>结果是<code>DataFrame</code>:</p>
<pre><code> abc xyz
exchange symbol
JSE MTN 123.00000 546.00000
OML 25.96151 15.32971 # square root is here
CME ES 235.00000 563.00000
YM 453.00000 365.00000
</code></pre>