Python uses the re module to regularly extract the content within brackets in the string-Python Tutorial-php.cn

Python uses the re module to regularly extract the content within brackets in the string

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Release： 2018-06-02 14:48:37

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This article mainly introduces Python's use of the re module to regularly extract the content within brackets in a string. It analyzes Python's use of the re module to perform regular matching operations on the content of brackets in the form of examples, and briefly explains the relevant modifiers and regular expressions. For the usage of the statement, friends who need it can refer to

. This article describes the use of the re module in Python to extract the content within the brackets in the string. Share it with everyone for your reference, the details are as follows:

Go directly to the code:

# -*- coding:utf-8 -*-
#! python2
import re
string = &#39;abe(ac)ad)&#39;
p1 = re.compile(r&#39;[(](.*?)[)]&#39;, re.S) #最小匹配
p2 = re.compile(r&#39;[(](.*)[)]&#39;, re.S)  #贪婪匹配
print(re.findall(p1, string))
print(re.findall(p2, string))

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##Output :

[&#39;ac&#39;]
[&#39;ac)ad&#39;]

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Explanation:

1. The r is added before the regular matching string so that the special symbols inside do not need to be written with backslashes.

2. [ ] has the function of removing special symbols, that is to say, the ( in [(] is just an ordinary bracket

3. The () in the regular matching string is to extract the entire regular expression The content in the string that conforms to the regular expressions in parentheses

4. . is used to represent any character except the newline character. *Klin closure, appearing 0 or infinite times.

5. Adding? is a minimum match, not adding is a greedy match.

6. re.S is to let . represent any character except the newline character.

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