Sometimes, we want to find the nth occurrence of substring in a string with Python.
In this article, we’ll look at how to find the nth occurrence of substring in a string with Python.
How to find the nth occurrence of substring in a string with Python?
To find the nth occurrence of substring in a string with Python, we can use the re.finditer method.
For instance, we write
import re
s = "ababdfegtduab"
indexes = [m.start() for m in re.finditer(r"ab", s)]
to create a list of indexes with the matches we’re looking for in string s by calling re.finditer with the regex pattern we’re looking for and s.
Then we call m.start to get the index of a instance of the match in the loop.
Conclusion
To find the nth occurrence of substring in a string with Python, we can use the re.finditer method.