擅长:python、mysql、java
<p>将<a href="https://docs.scipy.org/doc/numpy/reference/generated/numpy.ravel.html" rel="nofollow noreferrer">^{<cd1>}</a>与<code>.isin()</code>一起使用:</p>
<pre><code>df2['Checked']=df2.isin(df1.values.ravel()).any(axis=1)
print(df2)
</code></pre>
<hr/>
<pre><code> Site_x Site_y Checked
0 CTBX3901E CTBX3901 True
1 CTB3901 CTB3901E True
2 CTBZ3901E CTBZ3901 True
3 CTBY3901E CTB3901 True
4 MADX6379E MADX6379 False
</code></pre>