擅长:python、mysql、java
<p>可以使用<code>re.sub</code>将一个或多个</em>新行(<code>\n</code>)替换为单数空格。然后去掉结果(任何尾随空格和前导空格)并将其连接到<code>'#'</code>:</p>
<pre><code>import re
'#' + re.sub('\n+',' ',s).strip()
#'#Created on Mar 11, 2017 @author: XXZ This file is to demonstrate the word frequency counter. This is a very important practical'
</code></pre>