擅长:python、mysql、java
<p>IIUC公司</p>
<pre><code>df_1.fillna(df_2, inplace=True)
</code></pre>
<p>或者</p>
^{pr2}$
<hr/>
<p><strong><em>演示</em></strong></p>
^{3}$
<p><a href="https://i.stack.imgur.com/KpIZW.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/KpIZW.png" alt="enter image description here"/></a></p>
<pre><code>df_1.loc[df_1.temp.isnull(), 'temp'] = df_2.temp
df_1
</code></pre>
<p><a href="https://i.stack.imgur.com/KpIZW.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/KpIZW.png" alt="enter image description here"/></a></p>