Python正则表达式以匹配VT100转义序列 [英] Python regex to match VT100 escape sequences

问题描述

我正在编写一个记录终端交互的Python程序(类似于 script 程序)，并且我想在写入磁盘之前过滤掉VT100转义序列.我想使用这样的功能:

I'm writing a Python program that logs terminal interaction (similar to the script program), and I'd like to filter out the VT100 escape sequences before writing to disk. I'd like to use a function like this:

def strip_escapes(buf):
    escape_regex = re.compile(???) # <--- this is what I'm looking for
    return escape_regex.sub('', buf)

escape_regex中应该包含什么?

推荐答案

转义序列的组合表达式可以是这样的通用名称:

The combined expression for escape sequences can be something generic like this:

(\x1b\[|\x9b)[^@-_]*[@-_]|\x1b[@-_]

应与re.I

其中包括:

1. 两个字节的序列，即\x1b，后跟@到_范围内的字符.
2. 一个字节的CSI，即\x9b而不是\x1b + "[".

1. Two-byte sequences, i.e. \x1b followed by a character in the range of @ until _.
2. One-byte CSI, i.e. \x9b as opposed to \x1b + "[".

但是，这不适用于定义键映射或包含在引号中的包含字符串的序列.

However, this will not work for sequences that define key mappings or otherwise included strings wrapped in quotes.

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