Python堆排序

def adjust_deap(arr, p, b):
    while True:
        if 2 * p + 1 > b - 1:
            break
        elif 2 * p + 2 < b and arr[2 * p + 2] > arr[2 * p + 1] and arr[2 * p + 2] > arr[p]:
            arr[p], arr[2 * p + 2] = arr[2 * p + 2], arr[p]
            p = 2 * p + 2
        elif arr[2 * p + 1] > arr[p]:
            arr[p], arr[2 * p + 1] = arr[2 * p + 1], arr[p]
            p = 2 * p + 1
        else:
            break
    return arr

def create_heap(arr):
    m = len(arr) / 2 - 1
    while m > -1:
        arr = adjust_deap(arr, m, len(arr))
        m -= 1
    return arr

def heap_sort(arr):
    m = len(arr) - 1
    while m:
        arr[0], arr[m] = arr[m], arr[0]
        arr = adjust_deap(arr, 0, m)
        m -= 1
    return arr

a = [4, 2, 4, 7, 5, 3, 6, 8, 9, 35, 4, 2, 45, 65, 23]
heap = create_heap(a)
print heap_sort(heap)