Regex used in those years

Table of contents

1. Match the mobile phone number in the text

1.1 Mode Description

1.2 Verify whether the mobile phone number is legal in python

1.3 In HiveSQL, query whether a field contains a mobile phone number and replace it

2. Match lines that do not contain a certain string

1.1 Mode Description

1.2 Use regular expressions in python to match lines that do not contain a certain string

---

1. Match the mobile phone number in the text

1.1 Mode Description

pattern = r"^1[3-9]\d{9}$"

说明：
    这个正则表达式的意思是以数字1开头，后面跟着3-9之间的数字，再加上任意9个数字，总共11位数字。这个正则表达式可以匹配大部分中国大陆手机号码。

1.2 Verify whether the mobile phone number is legal in python

import re

phone_number = "13812345678"
pattern = r"^1[3-9]\d{9}$"

if re.match(pattern, phone_number):
    print("手机号码合法")
else:
    print("手机号码不合法")

1.3 In HiveSQL, query whether a field contains a mobile phone number and replace it

select 
regexp_replace(json,'desmobile:1[3-9][0-9]{9}','desmobile:')  -- 替换手机号
from tableName
where ds='20230411'
and regexp_like(json, 'desmobile:1[3-9][0-9]{9}') -- 匹配包含手机号的记录
limit 2

---

2. Match lines that do not contain a certain string

1.1 Mode Description

^(?!.*pattern).*
其中，`pattern`是你想要排除的字符串。这个正则表达式的意思是：匹配任意行，但是这些行不能包含`pattern`字符串。

1.2 Use regular expressions in python to match lines that do not contain a certain string

import re

text = """This is a line
This is another line
This line contains the word apple
This line does not contain the word banana
"""

pattern = r"^(?!.*banana).*$"

for line in text.split("\n"):
    if re.match(pattern, line):
        print(line)

这个代码会输出以下结果：

```
This is a line
This is another line
This line contains the word apple
```
可以看到，只有不包含`banana`字符串的行被匹配到了。