findall regex python

There is a strange problem with practicing the RE module today, and the same regular expression is inconsistent with the results of re.search () matching with Re.compile (). FindAll ().It is very strange, therefore, to record, so as to prevent a similar situation in the future can not solve.1 #!/usr/bin/env Python32 #Author:taoke3 ImportRe4str =''5Pat ='[A-za-z0-9]+://[a-za-z0-9]+\. [A-za-z0-9]+\. (COM|CN)'6p =Re.search (PAT,STR)7 Print(P)8p =Re.compi

The difference between Python full stack--6.1-match-search-findall-group (s) and the calculator instanceMatch, search, FindAll, group (s) differences12345Import re# match FindAll often use# Re.match () #从开头匹配, no match to object returns none# Re.search () #浏览全部字符, matches the first rule-compliant string# Re.findall ()

Python re module findall () function instance parsing, pythonfindall This article studies the findall () function of the re module. First, let's look at the instance code: >>> import re >>> s = "adfad asdfasdf asdfas asdfawef asd adsfas " >>> reObj1 = re.compile('((\w+)\s+\w+)') >>> reObj1.findall(s) [('adfad asdfasdf

Tag: Relative import contains margin Imp expression regular expression string Tran Python re module findall function usage Briefcode Example:1>>>Import re2>>> s ="adfad asdfasdf asdfas asdfawef ASD Adsfas" 3 4>>> reObj1 = Re.compile ('((\w+) \s+\w+)') 5>>>Reobj1.findall (s)6[('Adfad asdfasdf','Adfad'), ('Asdfas asdfawef','Asdfas'), ('ASD Adsfas','ASD')] 7

' >>>M.Next(). Group ()' 6 ' >>>M.Next(). Group ()' 777 ' >>>M.Next(). Group () Traceback (most recent call last): File", line1,inch Module> stopiterationAnother example:>>>P= R ' (\d) \1+ ([a-za-z]+) ' >>>S= ' 1111werwrw3333rertert4444 ' >>>P= R ' (\d) \1+ ([a-za-z]*) ' >>> ImportRe>>>Re.findall (P,s) [(' 1 ',' WERWRW '), (' 3 ',' Rertert '), (' 4 ',"')]>>>M=Re.search (P,s)>>>M.group ()' 1111WERWRW ' >>>M.group (1)' 1 ' >>>M.group (2)' WERWRW ' >>>M.groups () (' 1 ',' WERWRW ')>>>M=R

Example of using the regular findall function in python, pythonfindall Example of using the regular findall function in python I learned the regular search () function. This function can find a matched string to return, but what should I do if I want to find all matched strings? Actually, you must use the

#/usr/bin/python#coding =utf-8# @Time: 2017/11/18 18:24# @Auther: Liuzhenchuan# @File: Re's split FindAll Finditer method. pyImport re #re. Compile to compile a regular expression into an object#split () method, is the splitp = re.compile (R ' \d+ ') a_str = ' One1two2three3foure4 ' #把p的正则当成分隔符, The string is cut with p and finally returned to print # # # ' *5 + " separated by digital \d ' *5 p

Writing code today, when writing to Zhengze, encountered a pit, which is the FindAll () function under the RE module.Below I will combine the code to recordImportrestring="ABCDEFG acbdgef ABCDGFE cadbgfe"#the difference between parentheses and without parentheses#with no parenthesesRegex=re.compile ("((\w+) \s+\w+)")Print(Regex.findall (string))#output: [(' ABCDEFG acbdgef ', ' ABCDEFG '), (' Abcdgfe cadbgfe ', ' ABCDGFE ')]regex1=re.compile ("(\w+) \

Python Regular Expression-findall#coding =utf-8import re ' # Gets the contents of the match ' ' P = re.compile (R ' \d+ ') print ' Find all the numbers ', P.findall (' One1two2three3four4 ') ' # Get matching Content-more complex examples of ' unicodepage = ' Search FindAll DifferencesSearch finds one and returns at most one match.

that matches all the parentheses in the expression>>> Re.findall (R ' A (b) (c) ', ' abcabc ')[(' B ', ' C '), (' B ', ' C ')](2) When there is only one parenthesis in the regular expressionThe elements of the returned list are surrounded by all the expressions that can be successfully matchedAnd the elements in the list are strings>>> Re.findall (R ' A (b) C ', ' ABCABC ')[' B ', ' B '](3) When there are no parentheses in the regular expressionThe elements in the returned list are made up of a

The Python Regular Expression re findall can return matched substrings in the form of a list. Re. findall (pattern, string [, flags]):Search for strings and return all matching substrings in the form of a list. First look at a simpleCode: Import reP = Re. Compile (R' \ D + ')Print P. findall ('one1two2three3four4 '

The number of matches is defined with {}Re.search can generate group () that can access the string for each groupThe result of Re.findall is a list of elements that can be a string or a tuplemicrosoftwindows[version 6.1.7601] copyright (c) 2009microsoftcorporation. All rights reserved. c:\users\user>pythonpython3.5.2| anaconda4.2.0 (64-bit) | (default,jul52016,11:41:13) [MSC v.190064bit (AMD64)]onwin32type "Help", "copyright", " Credits "or" license "formoreinformation.>>>importre>> >str= "ATGT

In the python standard libraryXML. etree. elementtreeIt is easy to use and encapsulated for XML operations. However, there are some details that need to be noticed by users:WhereXML. etree. elementtreeThe find and findall methods do not fully support XPath. Needless to say, xpath2.0 means that even xpath1.0 only supports a small part of xpath1.0. It can be said that it only supports a subset of xpath1.0.The

Replace the result found by re. findall () in python The regular expression re module uses findall to find the ascii code. Therefore, when the comparison is replaced, the corresponding ascii code is also required to match successfully. The following programs are used to find files with male and female in the folder, replace male with 1, and replace female with 2.

Match : Match only once, the start match does not go up, then does not continue matching a,b,\w+Match (A, "abcdef") matches a>>> Re.match ("A", "abcdef"). Group () ' A ' match (b, "abcdef") >>> print Re.match ("b "," abcdef ") Nonematch (" \w+ "," abcdef ")search, full string match, but match only once, match does not continue to match a, b,\w+>>> Re.search ("A", "ABCDEF ABC 123 456"). Group () ' A ' >>> re.search ("B", "ABCDEF ABC 123 456"). Group () ' B ' >>> re.search ("\w+", "abcdef ABC 123

the string, and if the match is not successful, match () returns none.function syntax: re. Match(pattern, string, flags=0) Match result: Re.match match succeeds returns an object, otherwise none is returned.Use Group (num=0) or groups () to get matching resultsRe.search function:Scans the entire string and returns the first successful match.function syntax:re. Search(pattern, string, flags=0) Parameters aboveMatch result: Returns a matching object if the match succeeds, otherwise no

In this article we'll look at the knowledge of python regular Expressions , some of whom may have just come into contact with the programming language of Python, not particularly in this respect, and in the next article will take you to learn about the expressions in the regular expression Python findall function .

(– This is a summary of the process of personal learning and use, if there is a mistake welcome)The Python regular module re findall and Finditer are similar, but there is a big difference.Both can get all the matching results, which is very different from the search method, while the difference is a return list, a matchobject type of iterator Let's say we have data in which numbers represent phone numbers,

Complete RegEx expressions (python) and regular expressions (python) Upload images to show your innocence. Regular (Regular Expression) In the use of python, regular expressions are very important. It is essential for crawlers or certain judgments. Next, let's talk about regular expressions. Hope you can give me more

O ' Reilly published by Wes McKinney, "Python for Data analysis"I use the tool: Pycharm 2016.3.2Warning: parserwarning:falling back to the ' Python ' engine because the ' C ' engine does is not a support regex separators (separators > 1 char and different from ' \s+ ' is interpreted as regex)Workaround: Add engine= '