""" 快速排序: """
def quick_sort(alist, first, last):
"""快速排序"""
if first >= last:
return
mid_value = alist[first]
low = first
high = last
while low < high:
# high 左移
while low < high and alist[high] >= mid_value:
high -= 1
alist[low] = alist[high]
while low < high and alist[low] < mid_value:
low += 1
alist[high] = alist[low]
# 从循环退出时, low == high
alist[low] = mid_value
# 对low左边的列表执行快速排序
quick_sort(alist, first, low-1)
# 对low右边的列表执行快速排序
quick_sort(alist, low+1, last)
if __name__ == '__main__':
li = [54, 65, 23, 46, 76, 45, 92, 14]
print(li)
quick_sort(li, 0, len(li) - 1)
print(li)