Python regular expression match and search usage instance

This example describes the Python regular expression match and search usages. Share to everyone for your reference. The specific analysis is as follows:

Python provides the main regular expression operations in 2: Re.match and Re.search.

Match: Matches only from the beginning of the string to the regular expression, the match returns Matchobject successfully, otherwise none is returned;

Search: The string attempt to match all strings to the regular expression, if all of the characters are not successfully matched, return none, otherwise return matchobject; (re.search equivalent to the default behavior in Perl)

Import Redef Testsearchandmatch (): s1= "HelloWorld, I am!" W1 = "World" M1 = Re.search (W1, S1) if M1:  print ("Find: %s "% M1.group ()) if Re.match (w1, s1) = = None:  print (" Cannot match ") W2 =" HelloWorld "m2 = Re.match (W2, S1) if m2:
 print ("match:%s"% M2.group ()) Testsearchandmatch () #find: World#cannot Match#match:helloworld

Hopefully this article will help you with Python programming.

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