擅长:python、mysql、java
<p>使用<a href="https://docs.python.org/3.6/library/re.html#re.sub" rel="nofollow noreferrer">re.sub</a>:</p>
<pre><code>import re
s = "string\n\n\nwith\n\nmultiple\n\n\nnewlines"
# Replace all multiple newlines with one newline
new_string = re.sub(r'\n+', '\n', s)
</code></pre>