Python反斜杠后跟数字

Question

我对python中转义键的理解如下：

They can be used to represent special characters (tab "\t", newline "\n", vertical indent "\v")

They can negate quotes/apostrophes ("\"", '\'')

They can negate the backslash escape key ('\\')

但是为什么'\1\2\3\4\5\6'显示为☺☻♥♦♣♠

为什么'\7'在我的电脑上发出噪音

为什么任何大于7的数字都不适用于逃生键？例如print('\8')显示为：\8

Answer 1

The \000 escape code produces the ASCII character with that octal value, ASCII 1 is Control-A, ASCII 7 is Control-G, which is the bell. \015 is Ctrl-M, carriage return. \012 is Ctrl-J, line feed. It's exactly like \x07, except octal instead of hexadecimal. All of this was inherited from C.

通过{a2}