擅长:python、mysql、java
<p>这应该规范化字符串:</p>
<pre><code>s="race. car, "
"".join(x for x in s if x.isalpha())
print s
</code></pre>
<p>给予</p>
<pre><code>racecar
</code></pre>
<p>您可以改用<code>s.isalnum</code>将数字保留在字符串中</p>
<p>对于测试:</p>
<pre><code>if e == e[::-1]: print "palindrome"
</code></pre>