擅长:python、mysql、java
<p>您可以将regex模块<a href="https://docs.python.org/2/library/re.html" rel="nofollow">^{<cd1>}</a>和函数<a href="https://docs.python.org/2/library/re.html#re.sub" rel="nofollow">^{<cd2>}</a>(replace/substitute)与lookahead<code>(?=from)</code>和lookbehind<code>(?<=copy )</code>-也称为<a href="http://www.regular-expressions.info/lookaround.html" rel="nofollow">lookaround</a>一起使用,以便只删除请求的部分<code>(.*)</code>,该部分介于:</p>
<pre><code>import re
print re.sub(r'(?<=copy )(.*)(?=from)', '', "copy table values from 'a.dat';")
</code></pre>
<p><strong>输出</strong></p>
^{pr2}$