how to find index of a string inside the string

Question

Hey (bad english) so i am working on a function that is going to check if a string1 is inside another string2. i do belive i have accomplished this, but after that, i am trying to find the index of where the string2 was found in the string1. if the string is not in the string at all it will return (-1). i have tried googling around and looking for asnwers i have seen someone use s.find(), but for somehow can't use it. Therefor i am asking here for some help this is how i have come:

def contains_string(str1, str2):
    if str1 in str2:
       print(str1.find(str2))
    else:
       print("-1")
    return

str1 = Ronaldo
str2 = Ron
str3 = Messi
print(contains_string(str1, str2))
print(contains_string(str1, str3))
#outcome should be:
#3    <- because Ron goes to index 3 in str1
#-1

i think i am really close, but i am not sure what i am missing

crayola skies · Accepted Answer · 2022-10-20 16:25:27Z

0

Apparently you have a small logic problem. When you use contains_string(str1,str2), you want to see if for example "Ron" is in "Ronaldo'. But you are checking this:

if str1 in str2:

This is basically saying is "Ronaldo" in "Ron" which is false. Thus, you'll only need to change that line

if str2 in str1:

Hope that helps!

answered Oct 20, 2022 at 16:25

crayola skies

161 bronze badge

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

how to find index of a string inside the string

1 Answer 1

Comments

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Related