算法学习笔记2---冒泡排序

import random
def bubble_sort_1(li):
    for i in range(len(li)-1):
        exchange = False
        for j in range(len(li)-i-1):
            if li[j] > li[j+1]:
                li[j],li[j+1] = li[j+1],li[j]
                exchange = True
        if not exchange:
            return

li=list(range(1000))
random.shuffle(li) #洗牌操作
bubble_sort_1(li)
print(li)