Python正则表达式的用法(1. 匹配)
来源:互联网 发布:智博海天软件工程学院 编辑:程序博客网 时间:2024/05/24 06:39
(作者:玛瑙河,转载请注明作者或出处,)
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
2if re.search(regex, subject):
3 do_something()
4else:
5 do_anotherthing()
6
2.测试正则表达式是否匹配整个字符串
2if re.match(regex, subject):
3 do_something()
4else:
5 do_anotherthing()
6
3.创建一个匹配对象,然后通过该对象获得匹配细节(Create an object with details about how the regex matches (part of) a string)
2match = re.search(regex, subject)
3if match:
4 # match start: match.start()
5 # match end (exclusive): match.end()
6 # matched text: match.group()
7 do_something()
8else:
9 do_anotherthing()
4.获取正则表达式所匹配的子串(Get the part of a string matched by the regex)
2match = re.search(regex, subject)
3if match:
4 result = match.group()
5else:
6 result = ""
5. 获取捕获组所匹配的子串(Get the part of a string matched by a capturing group)
2match = re.search(regex, subject)
3if match:
4 result = match.group(1)
5else:
6 result = ""
6. 获取有名组所匹配的子串(Get the part of a string matched by a named group)
2match = re.search(regex, subject)
3if match:
4 result = match.group("groupname")
5else:
6 result = ""
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)
2 # match start: match.start()
3 # match end (exclusive): match.end()
4 # matched text: match.group()
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)
2if reobj.search(subject):
3 do_something()
4else:
5 do_anotherthing()
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)
2if reobj.match(subject):
3 do_something()
4else:
5 do_anotherthing()
6
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)
2match = reobj.search(subject)
3if match:
4 # match start: match.start()
5 # match end (exclusive): match.end()
6 # matched text: match.group()
7 do_something()
8else:
9 do_anotherthing()
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)
2match = reobj.search(subject)
3if match:
4 result = match.group()
5else:
6 result = ""
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)
2match = reobj.search(subject)
3if match:
4 result = match.group(1)
5else:
6 result = ""
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)
2match = reobj.search(subject)
3if match:
4 result = match.group("groupname")
5else:
6 result = ""
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)
2result = reobj.findall(subject)
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)
2for match in reobj.finditer(subject):
3 # match start: match.start()
4 # match end (exclusive): match.end()
5 # matched text: match.group()
- 转载:Python正则表达式的用法(1. 匹配)
- Python正则表达式的用法(1. 匹配)
- Python正则表达式的常用匹配用法
- Python正则表达式的几种匹配用法
- Python正则表达式的几种匹配用法
- python 正则表达式匹配
- Python :正则表达式匹配
- 多正则表达式匹配工具 的用法
- Python正则表达式的用法
- python正则表达式的用法
- Python正则表达式的用法
- Python正则表达式的用法
- Python正则表达式的用法
- [Python]解决正则表达式的"贪婪"匹配
- [Python]几个正则表达式匹配的例子
- python正则表达式的匹配优先级
- Python中正则表达式的匹配规则
- Python 正则表达式(模式匹配)
- 查看本机有那些upd监听端口
- windows8 store控件开源,另附 打包教程(希望为windows8的发展献上绵薄之力)
- 数据结构堆、栈、队列区别
- 位向量排序
- 3月21日整理
- Python正则表达式的用法(1. 匹配)
- 激活 visio Premium 2010 vol 版本
- VC++动态链接库(DLL)编程深入浅出(1)
- 业务逻辑层,表示层,会话层及层间关系
- python抓取oschina最新文章
- 点击UpdatePanel中的按钮弹出javascript对话框
- Sublime Text 3 破解版 + 注册机 + 汉化包
- #program用法1
- Oracle 11g中Shrink Database Segment Online