擅长:python、mysql、java
<p>将<code>re.sub</code>与<code>^([^\s]*)\s+</code>一起使用:</p>
<pre><code>>>> s
'Achilles Triumph of Achilles in Corfu Achilleion'
>>> re.sub(r'^([^\s]*)\s+', r'\1, ', s)
'Achilles, Triumph of Achilles in Corfu Achilleion'
</code></pre>