擅长:python、mysql、java
<p>使用<a href="https://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.loc.html" rel="noreferrer">loc</a>:</p>
<pre><code>df.loc[df.Grad != 0.0, ['Vorgabe', 'Temp']] = np.nan
print(df)
</code></pre>
<p><strong>输出</strong></p>
<pre><code> OptOpTemp OpTemp BSP Grad Vorgabe Temp
0 22.0 20.0 5 0.0 22.0 20.0
1 22.0 20.5 7 0.0 22.0 20.5
2 22.0 21.0 8 1.0 NaN NaN
3 22.0 21.0 6 0.0 22.0 21.0
4 22.0 23.5 7 0.0 22.0 20.0
5 23.0 21.5 1 0.0 23.0 21.5
6 24.0 22.5 3 1.0 NaN NaN
7 24.0 23.0 4 0.0 24.0 23.0
8 24.0 25.5 9 0.0 24.0 25.5
</code></pre>