windows.py

def windows(sequence, step):
    i = 0
    while i < len(sequence):
        yield sequence[i: i + step]
        i += step

def filled_windows(sequence, step):
    i = 0
    while i + step <= len(sequence):
        yield sequence[i: i + step]
        i += step

assert list(windows([1,2,3,4,5], 1)) == [[1], [2], [3], [4], [5]]
assert list(windows([1,2,3,4,5], 2)) == [[1, 2], [3, 4], [5]]
assert list(windows([1,2,3,4,5], 3)) == [[1, 2, 3], [4, 5]]
assert list(windows([1,2,3,4,5], 4)) == [[1, 2, 3, 4], [5]]
assert list(windows([1,2,3,4,5], 5)) == [[1, 2, 3, 4, 5]]
assert list(windows([1,2,3,4,5], 6)) == [[1, 2, 3, 4, 5]]

assert list(filled_windows([1,2,3,4,5], 1)) == [[1], [2], [3], [4], [5]]
assert list(filled_windows([1,2,3,4,5], 2)) == [[1, 2], [3, 4]]
assert list(filled_windows([1,2,3,4,5], 3)) == [[1, 2, 3]]
assert list(filled_windows([1,2,3,4,5], 4)) == [[1, 2, 3, 4]]
assert list(filled_windows([1,2,3,4,5], 5)) == [[1, 2, 3, 4, 5]]
assert list(filled_windows([1,2,3,4,5], 6)) == []