list 冒泡排序 --for in --变量交换
# 查找 排序 k1 = [11,22,1, 2, 3, 4, 5, 6, 7, 8, 9, ] k1.sorted() # 排序改变 k1[1] , k1[2] = k1[2] ,k1[1] print(k1) # [11, 1, 22, 2, 3, 4, 5, 6, 7, 8, 9] #运用变量交换 ---- k1[i] , k1[i+1] = k1[i+1] ,k1[i] 相邻互换位置 # for in 循环比较
k1 = [11,22,1, 2, 3, 4, 5, 6, 9, 8, 9, ] for j in range(len(k1)-1): for i in range(len(k1)-1-j): if k1[i] > k1[i+1]: k1[i], k1[i + 1] = k1[i + 1], k1[i] print(k1) # [1, 2, 3, 4, 5, 6, 8, 9, 9, 11, 22] k1 = [11,22,1, 2, 3, 4, 5, 6, 7, 8, 9, ] for i in range(len(k1)-1): for i in range(len(k1) - 1): if k1[i] > k1[i+1]: k1[i] , k1[i+1] = k1[i+1] ,k1[i] print(k1) # [1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 22] for i in range(len(k1)-1): # for in 陷入循环 列表 if k1[i] > k1[i+1]: k1[i], k1[i + 1] = k1[i + 1], k1[i] print(k1) # [11, 1, 2, 3, 4, 5, 6, 7, 8, 9, 22]