rephone

string until a match is found Import revalue = "Hello world,2015!" Value_last = Re.match (R '), value) if Value_last:print (' match--> ', Value_last.group ()) else:print ("No match!") Value_end = Re.search (R '), value) print (' Search--> ', Value_end.group ()) The result of the output is: No match! Search--> 2015 1.3 Sub (pattern,repl,string,max=0) Match occurrences of the replacement string Import Rephone = "2015-5-31 # this is my num" num = re.su

matches the start position of the string. search () scans the entire string for matching;That is to say, match () is returned only when the match is successful at 0. If the match is not successful at the starting position, match () returns none. Search () scans the entire string and returns the first successful match. Use sub The re module of Python provides re. sub to replace matching items in strings. #!/usr/bin/pythonimport rephone = "2004-959-55

0-bit match succeeds, and the match () returns none if the match is not successful at the start position. Search () scans the entire string and returns the first successful match. Using Sub The Python re module provides re.sub to replace matches in a string. #!/usr/bin/pythonimport Rephone = "2004-959-559 # This is Phone number" # Delete Python-style commentsnum = re.sub (R ' #.*$ ', "", phone) print "Phone num:", num# Remove anything other than Digi

entire string for matching;That is to say, match () is returned only when the match is successful at 0. If the match is not successful at the starting position, match () returns none. Search () scans the entire string and returns the first successful match. Use sub The re module of Python provides re. sub to replace matching items in strings. #!/usr/bin/pythonimport rephone = "2004-959-559 # This is Phone Number"# Delete Python-style commentsnum = re

(' Match–>matchobj.group (): ', Matchobj.group ())ElsePrint (' No match ')Matchobj = Re.search (R ' Dogs ', line, re. M|re. I)If Matchobj:Print (' Search–> matchobj.group (): ', Matchobj.group ())ElsePrint (' No match ')Five. Search and replaceRe.sub (Pattren, Repl, String, count=0)Parameters:Pattren–> slightlyRepl–> the replacement string, or a function.String–> the original string to be looked up for replacement.Count–> the maximum number of substitutions after a pattern match, and the defaul

example:(0, 3)(11, 14)The match () function only detects if the RE is matched at the start of the string , andsearch () scans the entire string find matches;That is, Match () returns only if the match () is successful at 0 position, Match() If it is not a successful start position match will return none. Search () scans the entire string and returns the first successful match. Using SubThe Python re module provides re.sub to replace matches in a string. #!/usr/bin/pythonimport

found!!" # Resultno match!! Search--Searchobj.group (): dogsWe can see that match is to check the entire string from the beginning, assuming that it was not found or not found.Search looks for a complete string. ThroughRe.subThe detailed statements such as the followingRe.sub (Pattern, Repl, String, max=0)Replace all of the match parts of string for REPL, replacing all of the known replacements for Max.It then returns a modified string.Import Rephone