def reverse(data):
# range counts down: from the last index to 0
for current in range(len(data) - 1, -1, -1):
yield data[current]
chars = list(reverse("string"))
# chars is ['g', 'n', 'i', 'r', 't', 's']
numbers = list(reverse([1, 2, 3]))
# numbers is [3, 2, 1]
print(f"{chars = }")
print(f"{numbers = }")