The match Function in Python

PythonServer Side ProgrammingProgramming

This function attempts to match RE pattern to string with optional flags.

Syntax

Here is the syntax for this function −

re.match(pattern, string, flags=0)

Here is the description of the parameters −

Sr.No.Parameter & Description
1pattern
This is the regular expression to be matched.
2string
This is the string, which would be searched to match the pattern at the beginning of string.
3flags
You can specify different flags using bitwise OR (|). These are modifiers, which are listed in the table below.

The re.match function returns a match object on success, None on failure. We usegroup(num) or groups() function of match object to get matched expression.

Sr.No.Match Object Method & Description
1group(num=0)
This method returns entire match (or specific subgroup num)
2groups()
This method returns all matching subgroups in a tuple (empty if there weren't any)

Example

 Live Demo

#!/usr/bin/python
import re
line = "Cats are smarter than dogs"
matchObj = re.match( r'(.*) are (.*?) .*', line, re.M|re.I)
if matchObj:
   print "matchObj.group() : ", matchObj.group()
   print "matchObj.group(1) : ", matchObj.group(1)
   print "matchObj.group(2) : ", matchObj.group(2)
else:
   print "No match!!"

Output

When the above code is executed, it produces the following result −

matchObj.group() : Cats are smarter than dogs
matchObj.group(1) : Cats
matchObj.group(2) : smarter
raja
Published on 30-Jan-2020 07:28:58
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