擅长:python、mysql、java
<p>考虑<code>df</code></p>
<pre><code>df = pd.DataFrame(dict(EMAIL_ACQ_DT=['key1', None, 'key2', None, 'ke3', 'key4', None, None]))
print(df)
EMAIL_ACQ_DT
0 key1
1 None
2 key2
3 None
4 ke3
5 key4
6 None
7 None
</code></pre>
<hr/>
^{pr2}$