擅长:python、mysql、java
<p>这是相当糟糕的,但是迭代null的索引是有效的:</p>
<pre><code>In [11]: nulls = dfcolors[pd.isnull(dfcolors['Colors'])]
In [12]: for i, ni in enumerate(nulls.index[:len(dfalt)]):
dfcolors['Colors'].loc[ni] = dfalt['Alt'].iloc[i]
In [13]: dfcolors
Out[13]:
Colors
0 Blue
1 Red
2 Cyan
3 Green
4 Pink
5 NaN
6 Brown
</code></pre>