re findall python 3

m:' ['+ m. group (0) + ']', text, 0); replace the space ''In the string with '[]'.Re. splitYou can use re. split to split a string, such as re. split (r '\ s +', text). The string is split into a word list by space.Re. findallRe. findall can obtain all matching strings in the string. For example,

A: What is a regular? A regular is a way to describe a character or string by combining symbols with special meanings, called regular expressions. Or, the regular is the rule used to describe a class of things. (in Python) it is embedded in Python and is implemented through the RE module. The regular expression pattern is compiled into a sequence of bytecode, whi

()) # Gets the grouped result that matches to in the model # there are groups R = Re.search ("A (\w+)." pFindAll 123 # findall，获取非重复的匹配列表；如果有一个组则以列表形式返回，且每一个匹配均是字符串；如果模型中有多个组，则以列表形式返回，且每一个匹配均是元祖；# 空的匹配也会包含在结果中#findall(pattern, string, flags=0) # no grouping R = Re.findall ("a\w+", origin) print (r) # has grouping origin = "Hello Alex bcd abcd Lge ACD 19" r = Re.findall ("A (

Re-learn Python, learn python Digress: Python version: Latest 3.6 Installation Note: select the Add path to customize the first-level directory for installation to the hard disk, for example, my installation path: F: \ Python Cause: You can automatically add

Re-module Regular expressionIt also means that the backslash is escaped, and Python needs a backslash in the RE module. \d is to match a number \+ greater than or equal to 1 \w match digit letter underline and middle bar \* matches 0 or more \ t Indicator symbol . Except for the carriage return unexpected all * Greater than or equal to 0 + great

that matches a rule in the target string FindAll (Pattern, string, flags=0) First parameter: ruleSecond parameter: target stringBut three parameters: The following can also be followed by a rule selectionThe returned result is a list of strings that match the rules, and if there are no strings that match the rules, a null value will be returned. >>> import re>>> test_mail = ' test03@g

, string, flags=0) First parameter: ruleSecond parameter: Represents the string to matchThird parameter: Peugeot bit, used to control how regular expressions are matched >>> Import re >>> pattern = re.compile (R ' Linuxeye ') >>> match = Pattern.match (' Jb51.net ') >>> print match >>> m = Re.match (R ' Linuxeye ', ' jb51.net ') #不用re. Compile >>> print m Re.split used to split strings Split (patt

write two morePrint (Re.findall (R ' a\\c ', ' a\c A12 a2c ')) # ' a\\c '1 #Why the same expression search and findall have different results:2 Print(Re.search ('\ (([\+\-\*\/]*\d+\.? \d*) +\)',"1-12* (60+ ( -40.35/5)-( -4*3))"). Group ())#( -40.35/5)3 Print(Re.findall ('\ (([\+\-\*\/]*\d+\.? \d*) +\)',"1-12* (60+ ( -40.35/5)-( -4*

contains all the group strings in a regular expression, from 1 to the included group number, usually groups () does not require parameters, and returns a tuple that is a tuple defined in a regular expression.ImportRea="123abc456" Print(Re.search ("([0-9]*) ([a-z]*) ([ 0-9]*)", a). Group (0))#123abc456, return to the whole Print(Re.search ("([0-9]*) ([a-z]*) ([ 0-9]*)", a). Group (1))#123 Print(Re.search ("([0-9]*) ([a-z]*) ([ 0-9]*)", a). Group (2))#ABC Print(Re.search ("([0-9]*) ([a-z]*) ([ 0-

In essence, a regular expression (or RE) is a small, highly specialized programming language (in Python) that is embedded in Python and implemented through the RE module. The regular expression pattern is compiled into a sequence of bytecode, which is then executed by a matching engine written in C.Character match (nor

original string if the found content does not exist. fullmatch exact match search method: Re.fullmatch (pattern,string,flags=0) return value: subn Replace and return to progenitor method: Re.subn (pattern,repl,string,count=0,flags=0) return value: tuple example: print (' as ', ' 3 ', ' sfsasa,sdf ')) >>> (' Sfs3a,sdf ', 1) #该方法把替换后的字符串作为元祖的第一个元素, the second element is the number of replacements, and if not replaced, the number is 0

', ' rongtr ']print (re.split (' s ', ' Strongstr ')) # [', ' Trong ', ' tr ']print (Re.split (' [s,t] ', ' stsrongtr ')) # [', ' ', ' Rong ', ', ' R '] first Cut according to S, then cut according t to s cutting print (Re.split (' [s,t] ', ' stsrongtr ', 2)) # ["', ' ', ' srongtr '] first letter CuttingRe.sub (): String substitutionImport reprint (Re.sub (' \d+ ', ', ' Hello123world ')) # Hello WorldRe.compile ()Import recom = Re.compile (' \d+ ') print (Com.findall (' Hello123world '))