擅长:python、mysql、java
<p>您可以将<a href="https://pandas.pydata.org/pandas-docs/stable/generated/pandas.Series.mask.html" rel="nofollow noreferrer">^{<cd1>}</a>用于此目的:</p>
<pre><code>df['New Type'].mask(df['In Previous']=='Yes', 'In Previous', inplace=True)
</code></pre>
<p>有点令人困惑的是,您必须记住<code>pd.Series.mask</code>在满足条件时更新值,而{<cd3>}在条件满足时更新值。在</p>