擅长:python、mysql、java
<p>使用<a href="https://docs.scipy.org/doc/numpy/reference/generated/numpy.where.html" rel="nofollow noreferrer">^{<cd1>}</a>添加nan</p>
<pre><code>import numpy as np
df['satellite'] = np.where(df['gauge'].isnull(),np.nan,df['satellite'])
</code></pre>
<h2>第二种解决方案</h2>
<p>使用<code>.loc</code>和<code>isnull</code></p>
<pre><code>df.loc[df['guage'].isnull(),'satellite'] = np.nan
</code></pre>