Count number of occurrences of a given substring in a string

Question

How can I count the number of times a given substring is present within a string in Python?

For example:

>>> \'foo bar foo\'.numberOfOccurre         


        

Answer 1

If you want to count all the sub-string (including overlapped) then use this method.

import re
def count_substring(string, sub_string):
    regex = '(?='+sub_string+')'
    # print(regex)
    return len(re.findall(regex,string))