擅长:python、mysql、java
<p>使用<code>$</code>:</p>
<pre><code>>>> strs = "abc shot0000 "
>>> re.search(r"\s\w+\s$", strs) #use \w: it'll handle A-Za-z_
<_sre.SRE_Match object at 0xa530100>
>>> strs = "abc shot0000 _"
>>> re.search(r"\s\w+\s$", strs)
#None
</code></pre>