Find how many times string appears in another python

Question

Is there a method in python in order to check how many times a string appears in another? For example

a="1ab1"
new_string="1ab1ab1ab1"

I should get 3 but I got 2 with str.count()

Thank you

Answer 1

Here is a function that will count the number of substrings with overlap in a string:

def getSubstringCount(s1, s2):
    pos = 0
    count = 0
    while pos < len(s1):
        pos = s1.find(s2, pos)
        if pos == -1:
            break
        else:
            count += 1
            pos += 1
    return count

a="1ab1"
new_string="1ab1ab1ab1"
cnt = new_string.count(a)
print(cnt)

Output: 3