擅长:python、mysql、java
<p>你可以试试<a href="https://pandas.pydata.org/docs/reference/api/pandas.Series.where.html" rel="nofollow noreferrer">^{<cd1>}</a></p>
<pre><code>df["Valindex"] = df["Valindex0"].where(df["RB"].eq(0), df["Valindex1"])
contract Valindex0 RB Valindex1 Valindex
2 A00118 51 0 50 51
3 A00118 42 1 47 47
4 A00118 44 1 47 47
</code></pre>