python数据结构之希尔排序

def shell_sort(alist):
    n=len(alist)
    gap= int(n / 2) #步长
    while gap>0:
        for i in range(gap,n):
            j=i
            while j>=gap and alist[j-gap] > alist[j]:
                alist[j-gap],alist[j]=alist[j],alist[j-gap] #交换值
                j-=gap
        gap=int(gap/2)  #新的步长
alist=[11,33,44,55,66,9,72,86,93,10,1,0,2]
shell_sort(alist)
print(alist)