python re findall example

Re module: (Regular expression)Regular expressions are the matching rules of stringsRegular expressions are supported in most programming languages, and the corresponding module in Python is re-Common expression Rules: (All you need to remember)“ . ” #默认匹配除\n之外的任意一个字符，若指定flag DOTALL,则匹配任意字符，包括换行"^" #匹配字符开头，若指定flags MULTILINE,这种也可以匹配上("^a","\nabc\neee",flags=re.MU

Reference Document: http://blog.csdn.net/wusuopubupt/article/details/29379367Ipython environment, enter "? re", the official explanation is as follows:This module exports the following Functions:match match a regular expression pattern to the beginning of a stri Ng. Search Search A string forThe presence of a pattern. Sub substitute occurrences of a pattern foundincha string. Subn same as sub, but alsoreturnThe number of substitutions made. Spli

This article mainly introduces the Python dynamic re-encapsulation tutorial. This article is from the IBM official Developer Documentation. if you need a friend, refer to it. let's describe the plot of this article: assume that you want to run a process on the local machine, while some program logic is in another place. Let's assume that the program logic is updated from time to time, and you want to use th

threading.With the knowledge of readiness, we can use regular expressions in Python. Python provides the RE module, which contains the functionality of all regular expressions.Python's built-in module Itertools provides useful functions for manipulating iterative objects.Fortunately, Python provides htmlparser to pars

expression) Regex=re.compile (R ' (\bt\w+) \w+ (\w+) ') print ' Inputtext : ',textprint ' pattern : ', Regex.patternmatch=regex.search (text) print ' entirematch : ', Match.group (0) #表示整个表达式的字符串, sub-group sort print ' worldstartwith "T" starting from 1: ', Match.group (1) #匹配到的第一组print ' worldafter "T" NBSP;WORDNBSP;: ', Match.group (2) # The second group matched to the #python extended the basic grouping (? PContinue to study in .....This arti

: # 　　Group priority FindAll will first display the contents of the group, if you want to ungroup it first, (?: Regular expression) Split encounters a group that retains the cut-off content within the group Search if there is a grouping in search, you can get the matching content in Group by group (N)　　　Import Reret = Re.findall (' -0\.\d+|-[1-9]\d* (\.\d+)? ', ' -1asdada-200 ') print (ret) #结果: [' ', ']ret = Re.findall (' -0\.\d+ |-[1-9]

, Words, Words. ', 1)[' Words ', ' Words, Words. ']>>> re.split (' [a-f]+ ', ' 0a3b9 ', flags=re. IGNORECASE)Note: The python I used was 2.6, and the source code found that split () did not have the flags parameter, and 2.7 only increased. This problem I found more than once, the official documents and source inconsistencies, if found abnormal, should go to the source code to find the reason.If it matches a

the string to see if it matches the regular expression. Returns _SRE. The Sre_match object, if it cannot match, returns none.Re.match (Pattern, string, flags=0)Whether the beginning of the string can match the regular expression. Returns _SRE. The Sre_match object, if it cannot match, returns none.Re.split (Pattern, string, maxsplit=0)Separates a string from a regular expression. If you enclose the regular expression in parentheses, the matching string is also returned in the list. Maxsplit is

(Re.findall ('^alex','Alex say hello Alex'))Print(Re.search ('^alex','Alex say hello Alex')) obj=re.compile (R'^alex')Print(Obj.findall ('Alex say hello Alex'))Print(Obj.search ('Alex say hello Alex'). Group ())6. Supplement:Print(Re.findall (R'',''))Print(Re.findall (R'',''))Print(Re.findall (R'',''))Print(Re.findall (R'',''))[''][('H1','H1')][('H1','H1')]['H1'] Take all fetch group ibid. k7, take the numberPrint(Re.findall ('\-?\d+\.? \d*',"1-12* (60+ ( -40.35/5)-( -4*3))"))['1','-12',' -','-4

1 #Coding=utf-82 ImportRe3 ImportChardet#module for detecting Web page encoding form4 5p = Re.compile (r'\d+') 6 PrintP.findall ('ONE1TWO2THREE3FOUR4') 7 8A="REWFD231321EWQ21WEQEQW"9P=re.compile (R"(\d+) \d+ (\d+)", Re. S)Tenb=P.findall (a) One Printb A -A=u"I love @ embarrassed hundred, you?" - Printa theB=re.findall (U"(.+?) @ Embarrassing hundred (. +)", A,re. S) - Printb - forIinchB: - forJin

The methods used in the RE module are:1, compile ()Compiling a regular expression pattern is an object pattern, which can improve execution efficiency.Grammar:Re.compile (R ' pattern ', [flags])where R means not escaping the string, which means \ t is .For example:Import Rehello = "hello,i am tom,nice to konw U." A = Re.compile (R ' to ') b = a.findall (hello) ["to", ' to ']2. Match ()The matching string must begin with pattern, otherwise it will not

-f]+ ', ' 0a3b9 ', flags=re. IGNORECASE)Note: The python I used was 2.6, and the source code found that split () did not have the flags parameter, and 2.7 only increased. This problem I found more than once, the official documents and source inconsistencies, if found abnormal, should go to the source code to find the reason.If it matches at the beginning or end of the string, the returned list will start or

This article mainly introduces Python using the RE module to extract the contents of the string in parentheses, in conjunction with the instance of the form of the analysis of Python using the RE module for the parentheses content of the regular matching operation, and simple explanation of the correlation modifier and

First, run the Python interpreter, import the RE module and compile a re: The code is as follows Copy Code #!pythonPython 2.2.2 (#1, Feb 10 2003, 12:57:01)>>> Import re>>> p = re.compile (' [a-z]+ ')>>> P Now, you can try to match the different strings with the [a-z]+] of the

.' d2h_textfuncs.py ' Dynamic txt2html update "" "Hot-pluggable replacement functions for txt2html" "" #--functions to massage blocks by type #def titleify (bloc k): #def authorify (block): # ... [more block massaging functions] ... #--Utility functions for text transformation #def adjustcaps (TXT): #def capwords (TXT): #def urlify (TXT): def typographify (TXT): # [Module] names r = re.compile (R "' (\ \ S '/">]|^) \[(. *?) \] ([ \\2 \\3 ', txt) # *st

File and directory operations: -File read and write :The function of Python for file reading and writing is open orFile_handler =Open (Filename,mode)Mode Mode Description R Read-only r+ Write W Write, delete the original file before re-writing, if the file is not created w+ Read and write, first de

Group of Metacharacters ()#!/usr/bin/env python# -*- coding:utf-8 -*-import reprint(re.findall(r"(abc)+",‘abcccccabccc‘))#注释：分组是把括号内的字符串看成一个整体来做正则匹配 The result of the above instance execution:[' ABC ', ' ABC '] import reret=re.search(‘(?P The result of the above instance execution:23.com23 Re module common methods search#类似于find方法, when the first match is done, it will not contin

Project on-line requirements have speech and nickname filtering requirements, the client is using Python script, Python script directly using the RE module for regular matching, the first practice is to open the game, each frame compiled 2 regular, but operational requirements inside 100+ a slightly more complex regular style, A compilation on the PC requires 80m

Python: re. sub () second parameter, pythonre. sub Origin: The problem is caused by parsing the website kissanime. io.This video page will have a 5-second delay and submit a form for verification to prevent ddos attacks. The Form Verification is the following html code: Evaluate the jschl-answer value and use a piece of js Code. The js Code is randomly generated as follows: var s,t,o,p,b,r,e,a,k,i,n,

The content of this article is regular expression and the use of Python re library, now share to everyone, the need for friends can refer to the content of this article Regular expressions and the use of the Python re library Note: Images and related codes are sourced from MOOC Regular expressions Common ope