擅长:python、mysql、java
<p>一种解决方案是使用正则表达式和<a href="https://docs.python.org/3/library/re.html#re.sub" rel="nofollow noreferrer">^{<cd1>}</a>:</p>
<pre class="lang-py prettyprint-override"><code>import re
s = "blablablabla_20210812.jpg"
s = re.sub(r"_(\d{4})(\d{2})(\d{2})\.", r"_\1-\2-\3.", s)
print(s)
</code></pre>
<p>印刷品:</p>
<pre class="lang-none prettyprint-override"><code>blablablabla_2021-08-12.jpg
</code></pre>