python 正则表达式教程3 高效掌握re

1、\d 匹配任何十进制数字与[0-9]一致'lo\dve'第三个字符会匹配任意单一数字。用'i lo2ve someone named H媪青怍牙're.search('lo\dve','i lo2ve someone named H')则会匹配'lo2ve'\D 则会匹配任何不是十进制数字的字符。

2、\w 匹配任何数字字符与[0-9A-Za-z]一致'lo\dve'第三个字腿发滏呸符会匹配任意单一数字或字母。用'i loTve someone named H're.search('lo\wve','i loTve someone named H')则会匹配'loTve'\W 则会匹配任何不是十进制数字和字母的字符。

4、\b 匹配任何单词边界 记得+r用'i lo ve very-love love! someone named H're.search(r'\blove\b','i lo ve very-love love! someone named H')则会匹配'love'\B相反