擅长:python、mysql、java
<p>使用<code>astype</code>将字符串列转换为int,然后转换为布尔索引</p>
<pre><code>df['num'].str[2:4].astype(int)
0 0
1 1
2 2
3 4
Name: num, dtype: int64
</code></pre>
<p/>
<pre><code>df[df['num'].str[2:4].astype(int) % 2 == 0]
num let
0 A0000x a
2 C0020x c
3 D0040x d
</code></pre>