Calculate the product of a sliding window of integers in a list (Python)

window-product.py

from functools import reduce

def window_product(input: list[int], current_pos: int, window_size: int) -> int:
    window_bound = max(current_pos + 1 - window_size, 0)
    window = input[window_bound : current_pos + 1]
    product = reduce(lambda a, b: a*b, window)
    return product


def window_products(input: list[int], window_size: int) -> list[int]:
    products = [window_product(input, n, window_size) for n in range(len(input))]
    return products


def main():
    input = [2, 7, 8, 1, 9, 5]
    WINDOW_SIZE = 3
    print(window_products(input, WINDOW_SIZE))


if __name__ == '__main__':
    main()