这次给大家带来怎么用正则把字符串分组,用正则把字符串分组的注意事项有哪些,下面就是实战案例,一起来看一下。
前言
最近工作中遇到一个问题,需求是碰到'122333
一、实际上可以借助itertools模块的groupby()方法来处理:
import itertools Str = '122333<p style="text-align: left;">上面的处理,还是比较有技巧,也能得到想要的输出结果</p><p style="text-align: left;">['1', '22', '333', '</p><p style="text-align: left;"><span style="color: #ff0000"><strong>二、但更酷点,更技巧处理方式是用<a href="http://www.php.cn/wiki/588.html" target="_blank">正则表达式</a>来处理:</strong></span></p><pre class="brush:php;toolbar:false">import re Str = '122333<p style="text-align: left;"><strong>备注:</strong></p><p style="text-align: left;"> 1. (.) # .匹配任意字符;(.)做分组,方便后面反向<a href="http://www.php.cn/wiki/231.html" target="_blank">引用</a></p><p style="text-align: left;"> 2. \2* # \2对里面括号的反向引用;*代表是0个到多个;</p><p style="text-align: left;"> 3. ((.)\2*) # 连起来就是任意一个或多个字符组成的分组;</p><p style="text-align: left;"> 4. (.)\1* # 这种方式则可以取出唯一的值['1', '2', '3', '</p><p style="text-align: left;"><span style="color: #ff0000"></span></p><p>相信看了本文案例你已经掌握了方法,更多精彩请关注php中文网其它相关文章!</p><p>推荐阅读:</p><p><a href="http://www.php.cn/js-tutorial-390562.html" target="_blank">实现日期正则表达式详解</a><br></p><p><a href="http://www.php.cn/js-tutorial-390560.html" target="_blank">Replace中的正则表达式使用详解</a><br></p>
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