re findall python 3

Python regular expression re-module other methods1:search (pattern,string,flags=0)Find a match in a string2:findall (pattern,string,flags=0)Find a match, return the list of all matching partsIn [1]:ImportReIn [2]: str1 ='Imoooc videonum ='In [3]: Str1.find (' +') out[3]: 18I

letters [A-ZA-Z] matches all letters [a-z0-9a-z] equivalent to \w string escapeUse escape if you want to match some special characters in the meta-character itself or in the regular \ . For example, matching * this character is used \* , matching \ this character, using \\ .Characters to be escaped:,,,,,,,,,,,,, $ ( ) * + . [ ] ? \ ^ { }|为了避免过多\的使用，python提供了原生字符的方法，也就是在字符串前面加上一个“r”，代表此字符串中的“\”可直接用于正则表达式，而不用再次转义。因此，请养成在

Re-learn Python, learn pythonFile Read operations Example: 1 print ("-> file handle acquisition, read operation:") 2 3 f = open ('Untitled ', 'R', encoding = 'utf8 ') 4 d = f. read () 5 f. close () 6 print (d) 7 8 print ('-> Example 2:') 9 f = open ('untitle', 'R', encoding = 'utf8 ') 10 e = f. read (9) 11 f. close () 12 print (e) 13 # In python3, both Chinese

Python Regular expression Operations Guide (re used), oneThe end of the RE can now be reached, which matches "ABCB". This proves that the match engine will do its best to match at the start, and if there is no match then step back and try again the rest of the re. Until it returns an attempt to match [BCD] to 0 times,

one to three times, take one and returnG=re.search ('[0-9]{1,3}','a1bc234')#take one and return to match= ' 1 ' >Print(g)#match all, note findall No group methodH=re.findall ('[0-9]{1,3}','A1B2C345DE')Print(h)#[' 1 ', ' 2 ', ' 345 ']L=re.search ('abc| ABC','ABCDABC')#match= ' ABC 'Print(l) J=re.findall ('abc| ABC','ABCDABC')#match= ' ABC 'Print(J)#[' abc ', ' abc ']K=re.search ('abc{2}','FLMABCCC')Print(k)#match= ' ABCC ' >#match two pipe characters

Python re-introduces the covered built-in function, and python built-in function Fortunately, this problem is easy to solve. We only need to use _ builtins __: from __builtins__ import int as py_int In this way, we can re-use the python int, but in this case it is called py_

, Dear X,')2 'Attn:Mr.Smith, Dear Mr.smith,'3>>> Re.sub (r'X','Mr.smith','attn:x, Dear X,', Count=1) 4 'Attn:Mr.Smith, Dear X,'5>>>6.split (Pattern, string, max=0) splits the character string into a list based on the delimiter in the regular expression pattern, returning the list of successful matches, dividing the Max times by the default, by dividing all matching places.1 >>> re.split (R':'str1:str2:str3') 2 ['str1'str2 ' STR3']Used to split the r

Recently, I encountered a problem when writing a python application: When a module is introduced, a custom int is automatically introduced to the namespace of python, which overwrites the intfunction that comes with python. because we need to use the python int, we have to find the method to

(3000000000))Print (Time.gmtime (3000000000)) Struct_time = Time.localtime (3000000000) # Print (Time.mktime (struct_time)) ret = time.strftime ('%y/%m/%d%H :%m:%s ', struct_time) Print (ret) s_t = time.strptime (' 2028-5-21 ', '%y-%m-%d ') Print (s_t) Print ( Time.mktime (s_t)) #结构化时间 time stamp #time. Mktime (structured time) Time.mktime (time_tuple) #结构化时间--string time #time. strftime ("format definition", "structured Time") if the structured time parameter does not pass, the actu

Problem: Remove the phone number from the file belowor the following:Using regular expressions can be a bit simpler,RE ModuleThe regular expression is the string matching rules, in most programming languages have corresponding support, Python corresponding module is reCommon expression Rules'.'default match any character except \ n, if flag Dotall is specified, matches any character, including line break'^'

pacman -S mingw-w64-i686-zlib 2.5 D:/vcmi/toolchain.txt NewSET(CMAKE_SYSTEM_NAME Windows) SET(VCMIBUILD_DIR D:/vcmi) SET(CMAKE_C_COMPILER D:/Qt/Qt5.4.1/Tools/mingw491_32/bin/gcc.exe) SET(CMAKE_CXX_COMPILER D:/Qt/Qt5.4.1/Tools/mingw491_32/bin/g++.exe) SET(ENV{BOOST_ROOT} ${VCMIBUILD_DIR}/boost) SET(CMAKE_FIND_ROOT_PATH D:/msys64/mingw32) list(APPEND CMAKE_PREFIX_PATH ${CMAKE_FIND_ROOT_PATH}) list(APPEND CMAKE_PREFIX_PATH D:/Qt/Qt5.4.1/Tools/mingw491_32) SET(CMAKE_FIND_ROOT_PATH_MODE

Expressions the #1 FindAll () All results are returned the #2 Search () returns the first object to match, and the object can call the group () the #3 Match () returns only the first object that matches to the beginning of the string, and the object can call the group () + #4 Split (' [A, b] ') first divided by A to B - #5 Sub () Three parameters the first is the original content the second one is to repla

(Re.search (' \dcom ', ' www.4comrunoob.5com '). Group ()) The execution results are as follows: 4com (3). Re. FindAll ()Re.findall traversal matches, you can get all the matching strings in the string and return a list.Format:Re.findall (Pattern, string, flags=0)p = re.compile (R ' \d+ ')Print (P.findall (' O1n2m3k4 ')) The execution results are as foll

" print (Re.finda LL (R ' \d{3} ', Example_str))3.0 times and infinitely many times *Import Reexample_str = "Beautiful is better_ than ugly 78966828 $ \ r \ n ^explicit is better than implicit" print (Re.finda LL (R '. * ', EXAMPLE_STR))4.1 times and infinitely multiple +Import Reexample_str = "Beautiful is better_ than ugly 78966828 $ \ r \ n ^explicit is better than implicit" print (Re.finda LL (R ' \d+ ', example_str))5.0 or 1 times? Use idea: go t

') + Print(N.group ()) - #Way Two: thev = re.search ('\\\\c','ASDASD\CF') * Print(V.group ()) $ Panax Notoginseng #() and | The way to use - #() and | The use of the upgraded version of the complex version see the following example regular and value based on the group name the Print(Re.search ("(AS) |3","AS3"). Group ())#As note there is only one value + #Premium Edition A # theRet=re.search ('(? P','23/com') + Print(Ret.group ())#23/com - Print(Ret.g

Python Regular Expression module (re module) and python Regular Expression Python is the first programming language I have come into contact with. Although it is simple enough, it is still difficult for me to get started with programming languages, so I only learned some basic Pyth