擅长:python、mysql、java
<p>另一种方式</p>
<pre><code>df1.mask(df1.notna(),df2)
</code></pre>
<p>或者</p>
<pre><code>m=df1.notna()
pd.DataFrame(np.where(m, df2, np.nan))
</code></pre>
<p><a href="https://i.stack.imgur.com/Dpw5a.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Dpw5a.png" alt="enter image description here"/></a></p>