h4xx0r | h4xx0r.org home page

As mentioned in the comments, your code has a lot of redundant variables - this is a tidied up version of your code - it should work exactly the same as yours :

I think the biggest issue is that your code prints the count line, and then returns the indices line. If the autograder simply executes your function and ignores the return value it will ignore the indices. Note that the example code you cite prints both lines - and doesn't return anything. This is corrected in the version below.

Note that this code uses enumerate - it is a very good function to get into the habit of using if you need the contents of a list and you need to track the index in the list too.