Question

Using Python

#Write a function called after_second that accepts two
#arguments: a target string to search, and string to search
#for. The function should return everything in the first
#string *after* the *second* occurrence of the search term.
#You can assume there will always be at least two
#occurrences of the search term in the first string.
#
#For example:
# after_second("11223344554321", "3") -> 44554321
#
#The search term "3" appears at indices 4 and 5. So, this
#returns everything from the index 6 to the end.
#
# after_second("heyyoheyhi!", "hey") -> hi!
#
#The search term "hey" appears at indices 0 and 5. The
#search term itself is three characters. So, this returns
#everything from the index 8 to the end.
#
#Hint: This may be more complicated than it looks! You'll
#have to look at the length of the search string and
#either modify the target string or take advantage of the
#extra arguments you can pass to find().

#Write your function here!

#Below are some lines of code that will test your function.
#You can change the value of the variable(s) to test your
#function with different inputs.
#
#If your function works correctly, this will originally
#print 44554321 and hi!, each on their own line.
print(after_second("11223344554321", "3"))
print(after_second("heyyoheyhi!", "hey"))

Answer 1

def after_second(s,target):

    # finding first occurrence of target string
    first_ind = s.find(target)

    # finding second occurrence of target string
    second_ind = s.find(target, first_ind+1)

    # if second_ind is -1 then there is no
    # second occurrence of target it returns empty
    if second_ind == -1:
        return ""

    # Example:
    #       s = heyyoheyhi! , target = hey
    #       first_index     = 0
    #       second_index    = 5
    #       we have to remove the target string
    #       so second index + length of target string
    #       gives the remaining text
    return s[second_ind+len(target):]


print(after_second("11223344554321", "3"))
print(after_second("heyyoheyhi!", "hey"))

Output: