擅长:python、mysql、java
<p>您只需在代码中添加一个“else”</p>
<pre><code>ls=['ISSN1','94500','2424922X','','21693536','01464116','16879724','22042326','07419341','09272852','00015903','0324721X','']
ls = [i.zfill(8) if i != "" else '' for i in ls]
ls
</code></pre>
<p>输出:</p>
<p><a href="https://i.stack.imgur.com/pa2gM.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/pa2gM.png" alt="enter image description here"/></a></p>