擅长:python、mysql、java
<p>使用拆分和联接:</p>
<pre><code>>>> a="45_cat_fish"
>>> '_'.join(a.split('_')[1:])
'cat_fish'
</code></pre>
<p>编辑:<a href="https://docs.python.org/2/library/string.html#string.split" rel="nofollow noreferrer">split</a>可以采用<code>maxsplit</code>参数(参见<a href="https://stackoverflow.com/a/25887775/3336968">YS-L</a>答案),因此<code>'_'.join</code>是不必要的,<code>a.split('_',1)[1]</code></p>
<hr/>
<p>使用<a href="https://docs.python.org/2/library/string.html#string.find" rel="nofollow noreferrer">find</a></p>
<pre><code>>>> a[a.find('_')+1:]
'cat_fish'
</code></pre>