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Back Reference In Python Regex

07/09/2017 0 0

What if your interviewer asks about this?

We know Regex have some useful functions like:

  • match  (  Ex: re.match(pattern,dataSource)   )
  • search (  Ex: re.search(pattern,dataSource)   )
  • sub      (  Ex: re.sub(pattern,replaceStr,dataSource)   
  • findall  (  Ex: re.findall(pattern,dataSource)   )
Do we heard the term back reference in python?
Let me explain sample examples: how to check whether the given string follows the given pattern?
Sample program implementation:
import re                   #re - Python Library for regular-expression 
                                #Above \\1 and \\2 back referencing the respective group of pattern
print findObj.group()
Output: Matched object: aabab
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