re.MatchObject.start()

This method returns the first index of the substring matched by group.

Syntax: re.MatchObject.start([group])

Parameter:

• group: (optional) group defaults to zero (meaning the whole matched substring). Return -1 if group exists but did not contribute to the match. 

Return: Index of start of the substring matched by group.

AttributeError: If a matching pattern is not found then it raise AttributeError.

In this article, we are going to see re.MatchObject.start() and re.MatchObject.end() regex methods.