Comparing two lists on Python

Question

I need help comparing two lists and returning the indices that they don't match.

a = [0, 1, 1, 0, 0, 0, 1, 0, 1]
b = [0, 1, 1, 0, 1, 0, 1, 0, 0]

indices 4 and 8 don't match and i need to return that as a list [4,8]

I've tried a few methods but they haven't worked for me.

Answer 1

Use zip to iterate over both lists at the same time and enumerate to get the indices during iteration, and write a list comprehension that filters out the indices where the list values don't match:

>>> [i for i, (x, y) in enumerate(zip(a, b)) if x != y]
[4, 8]