[第二章]Python字符串切片示例

[第三章] Python使用字符串切片示例

3.16 s = ‘hello’, t = ‘world’, s+= t, 则s、s[-1]、s[2:8]、s[::3]、s[-2::-1]、s[::-1]分别是多少？3.16 s = ‘hello’,