擅长:python、mysql、java
<p>首先展开索引以包含所有数字</p>
<pre><code>s = pd.Series(['Cocoa', 'Coffee', 'Maize', 'Rice', 'Sugar', 'Wheat',], index=[0,4,6,7,10, 12], name='Commodity')
s = s.reindex(range(s.index.max() + 1))
</code></pre>
<p>然后执行<code>backfill</code></p>
^{pr2}$