[FIXED] Finding index where n elements equal in Python

Issue

first of all I am sorry if this have been answered elsewhere. But I have been trying to solve this issue where I want to get the index where n elements repeats it self. So for example if I wanted the index from a list containing bools where True have repeated itself 3 times:

A = [False, False, True, True, True, False, True, True, True]

So in this example I would want the index 2.

Solution

Heres another approach.

def get_index(lst, n):
    for i in range(len(lst)):
        if lst[i:i+n] == [True]*n:
            return i
    return -1

Usage is basically print(get_index(lst, 3)) returns index if found, else returns -1. You could of course modify True to be any value you want to match against.

Answered By - Martin Namukombo