擅长:python、mysql、java
<p>下面的正则表达式将用<code>.</code>+<code>\n</code>替换后跟非空格字符的所有点</p>
<pre><code>>>> import re
>>> s = "Ex1. This is a random sentence.1,7,9 This is a sentence followed by it."
>>> print(re.sub(r'\.(\S)', r'.\n\1', s))
Ex1. This is a random sentence.
1,7,9 This is a sentence followed by it.
</code></pre>
<p><a href="https://regex101.com/r/jV2tO0/5" rel="nofollow">DEMO</a></p>