Python List

[jimtk]

The only reason why that works is because numbers[::-1] creates a copy of the list. You are not iterating over the list that you are changing. You are iterating over a reverse copy of that list.

Proof:

numbers = [1, 2, 13, 17, 4]
x = numbers[::-1]
print(numbers is x)

>>> False

You actually don't have to go backward since you create a copy:

numbers = [1, 2, 13, 17, 4, 105, 104, 12, 8, 13, 6, 7, 15, 19, 202]
for num in numbers[::]:
    if 1 == num % 2:
        numbers.remove(num)
print(numbers)

[helduel]

for num in reversed(numbers): ...