快排----Python模板

def partition(arr,low, high):
    i=(low-1)
    p=arr[high]
    for j in range(low, high):
        if arr[j]<=p:
            i+=1
            arr[i],arr[j]=arr[j],arr[i]
    arr[i+1],arr[high]=arr[high],arr[i+1]
    return i+1


def quicksort(arr,low,high):
    if low<high:
        base=partition(arr,low,high)
        quicksort(arr,low,base-1)
        quicksort(arr,base+1,high)


arr=[10,203,20,22,11,100]
n=len(arr)
quicksort(arr,0,n-1)
print(‘ ‘.join(map(str, arr)))