Python re Regular Expression instance code, pythonre Regular Expression

Python re Regular Expression instance code, pythonre Regular Expression

This article focuses on the reregex expressions of python. The details are as follows.

Concept: Regular Expressions (generic formulas) are expressions used to express a set of strings in a concise manner. The advantage is conciseness.

Application: string matching.

Instance code:

CODEC = 'utf-8' # encoding: UTF-8 import re p = re. compile ("AB") str = "abfffa" # match must match the first letter if p. match (str): print p. match (str ). group () # match must match the first letter. group () prints matching letters out print re. match ('a + B ', 'abvvaabaaab '). group () # differs from match to match the print re letter at any position. search ('a + B ', 'vvvaabaaab '). group () # print re. findall ('a + B ', 'vabmaabnaaab') print re. split (':', 'str1: str2: str3') # The regular expression print ('str1: str2: str3') cannot be matched '). split (':') # separates strings in the form of a + B. It can match the regular expression print re. split ('a + B ', 'vabmaabnaaab ')

Print Information

AB aab ['AB', 'aab', 'aaab'] ['str1', 'str2', 'str3'] ['str1', 'str2 ', 'str3'] ['V', 'M', 'n', '']

Summary

The above is all the content of the python re Regular Expression instance code in this article, I hope to help you. If you are interested, you can continue to refer to other related topics on this site. If you have any shortcomings, please leave a message. Thank you for your support!