pip install pregex示例：匹配IP和网址from pregex.core.classes import AnyLetter, AnyDigit, AnyFromfrom pregex.core.quantifiers import Optional, AtLeastAtMostfrom pregex.core.operators import Eitherfrom pregex.core.groups import Capturefrom pregex.core.pre import Pregex# 网址 Url 协议http_protocol ...
Extract capture group, multiple timesfinditer also works, but you get the full Match object for each capture import re pattern = r'a(\d+)' re.findall(pattern, 'a1 b2 a32') # >>> ['1', '32'] Extract first occurrence of regexThis matches a pattern anywhere in the string, but ...
If <regex> contains more than one capturing group, then re.findall() returns a list of tuples containing the captured groups. The length of each tuple is equal to the number of groups specified:Python 1>>> re.findall(r'(\w+),(\w+)', 'foo,bar,baz,qux,quux,corge') 2[('foo...
R|S Match either regex R or regex S. () Create capture group, & indicate precedence After '[', enclose a set, the only special chars are: ] End the set, if not the 1st char - A range, eg. a-c matches a, b or c ^ Negate the set only if it is the 1st char ...
In simple terms, be careful while using there.split()method when the regular expression pattern is enclosed in parentheses to capture groups. If capture groups are used, then the matched text is also included in the resulted list. It is helpful when you want to keep the separators/delimiter ...
pattern=r"(?P.*) - (?P<level>[0-9]+) - (?P<message>.*)"# Regexwithnamed groups caster_dict=dict(time=dateutil.parser.parse,level=int)# Transform matching groupsforgroupsinlogger.parse("file.log",pattern,cast=caster_dict):print("Parsed:",groups)#{"level":30,"message":"Log exam...
5.5 分组Groups 5.6 断言Assertions 5.7 标志位Flags 正则表达式速查表 六、Python RegEx functions and methods常用函数及方法 七、常用正则表达式示例 八、Python正则表达式练习案例 正则表达式参考网站 1.Python官方编写的re模块的HOWTOs 2. Python官方re library 一、正则表达式简介 1.1 概念 正则表达式regular expressi...
importre# Lets use a regular expression to match a few date strings.regex =r"[a-zA-Z]+ \d+"matches = re.findall(regex,"June 24, August 9, Dec 12")formatchinmatches:# This will print:# June 24# August 9# Dec 12print("Full match: %s"% (match))# To capture the specific mont...
A|B, where A and B can be arbitrary REs, creates a regular expression that will match either A or B. An arbitrary number of REs can be separated by the'|'in this way.This can be used inside groups (see below) as well.As the target string is scanned, REs separated by'|'are trie...
Instead of having lots of different regexes, you can have one top level regex that can match the whole line, dividing it up into capture groups with brackets (()). The capture groups have no effect on the actual matching process, but they do affect the match object that results from the...