Python Basic Knowledge¶ 约 35 个字 预计阅读时间不到 1 分钟 [::-1]¶ When an object is indexable,we can use a[::-1],-1 means it will do operation from end to start. So [A:B:-1] Bytewise Operation¶ >> 右移 << 左移 相当于乘\(2^n\) & , | ,