擅长:python、mysql、java
<p>尝试使用Lookbehind<code>"(?<=[a-z])([A-Z])"</code></p>
<p><strong>Ex:</strong></p>
<pre><code>import re
s = "RegularExpression"
print(re.sub(r"(?<=[a-z])([A-Z])", r" \1", s))
</code></pre>
<p><strong>输出:</strong></p>
<pre><code>Regular Expression
</code></pre>