时间：2022-12-01 10:56:13 | 栏目：Python代码 | 点击：次
print([[x for x in range(1,101)][i:i+3] for i in range(0,100,3)])
输出结果
[[1, 2, 3], [4, 5, 6], [7, 8, 9], [10, 11, 12], [13, 14, 15], [16, 17, 18],
[19, 20, 21], [22, 23, 24], [25, 26, 27], [28, 29, 30], [31, 32, 33],
[34, 35, 36], [37, 38, 39], [40, 41, 42], [43, 44, 45], [46, 47, 48],
[49, 50, 51], [52, 53, 54], [55, 56, 57], [58, 59, 60], [61, 62, 63],
[64, 65, 66], [67, 68, 69], [70, 71, 72], [73, 74, 75], [76, 77, 78],
[79, 80, 81], [82, 83, 84], [85, 86, 87], [88, 89, 90], [91, 92, 93],
[94, 95, 96], [97, 98, 99], [100]]
步长格式 变量[开始索引:结束索引:长度]
步长计算公式 当前索引+ 步长= 下一个索引
步长同时也可以取成负数
str1 = "yesterday once more" str2 = str1[::-1] print(str2)
步长为负数时,省略开头,对应的是最后一个结尾
步长为负数时,省略结尾,对应的是第一个元素
str2 = str1[10::-1] print(str2) str2 = str1[:6:-1] print(str2)