Python/sorts/stooge_sort.py

def stooge_sort(arr):
    """
    >>> arr = [2, 4, 5, 3, 1]
    >>> stooge_sort(arr)
    >>> print(arr)
    [1, 2, 3, 4, 5]
    """
    stooge(arr, 0, len(arr) - 1)


def stooge(arr, i, h):

    if i >= h:
        return

    # If first element is smaller than the last then swap them
    if arr[i] > arr[h]:
        arr[i], arr[h] = arr[h], arr[i]

    # If there are more than 2 elements in the array
    if h - i + 1 > 2:
        t = (int)((h - i + 1) / 3)

        # Recursively sort first 2/3 elements
        stooge(arr, i, (h - t))

        # Recursively sort last 2/3 elements
        stooge(arr, i + t, (h))

        # Recursively sort first 2/3 elements
        stooge(arr, i, (h - t))