Python正则表达式的用法

字符串替换

1.替换所有匹配的子串
用newstring替换subject中所有与正则表达式regex匹配的子串

2.替换所有匹配的子串(使用正则表达式对象)

字符串拆分

1.字符串拆分

2.字符串拆分(使用正则表示式对象)

匹配

下面列出Python正则表达式的几种匹配用法:
1.测试正则表达式是否匹配字符串的全部或部分

2.测试正则表达式是否匹配整个字符串

3. 创建一个匹配对象,然后通过该对象获得匹配细节

4.获取正则表达式所匹配的子串
(Get the part of a string matched by the regex)

5. 获取捕获组所匹配的子串
(Get the part of a string matched by a capturing group)

6. 获取有名组所匹配的子串
(Get the part of a string matched by a named group)

7. 将字符串中所有匹配的子串放入数组中
(Get an array of all regex matches in a string)

8.遍历所有匹配的子串
(Iterate over all matches in a string)

9.通过正则表达式字符串创建一个正则表达式对象
(Create an object to use the same regex for many operations)

10.用法1的正则表达式对象版本
(use regex object for if/else branch whether (part of) a string can be matched)

11.用法2的正则表达式对象版本
(use regex object for if/else branch whether a string can be matched entirely)

12.创建一个正则表达式对象,然后通过该对象获得匹配细节
(Create an object with details about how the regex object matches (part of) a string)

13.用正则表达式对象获取匹配子串
(Use regex object to get the part of a string matched by the regex)

14.用正则表达式对象获取捕获组所匹配的子串
(Use regex object to get the part of a string matched by a capturing group)

15.用正则表达式对象获取有名组所匹配的子串
(Use regex object to get the part of a string matched by a named group)

16.用正则表达式对象获取所有匹配子串并放入数组
(Use regex object to get an array of all regex matches in a string)

17.通过正则表达式对象遍历所有匹配子串
(Use regex object to iterate over all matches in a string)

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