显然，我正在使用 telnetlib.expect() 与以字节串响应的设备交互。除非我在传递给 expect() 的正则表达式中使用字节字符串(预编译或文字)，否则会生成异常:TypeError: cannot use a string pattern on a bytes-like object。然而，pycodestyle 提示这是 W605 invalid escape sequence '\d'，进一步阅读让我认为这将成为 future 的 Python 语法错误。
总结:
telnetlib.expect([b'\d']) # OK, but W065
telnetlib.expect(['\d'] # TypeError
telnetlib.expect([r'\d'] # TypeError
有办法解决这个问题，还是 pycodestyle 完全错误？
(顺便说一句，除了抑制所有警告之外，似乎无法抑制 pycodestyle 中的 W065。)
请您参考如下方法:
字节串文字使用 \ 作为转义字符，就像字符串文字一样。与它们非常相似，您必须使用原始字节串文字 rb'\d' 或使用双反斜杠 b'\\d'。
来自 https://docs.python.org/3/reference/lexical_analysis.html#string-and-bytes-literals
In plain English: Both types of literals can be enclosed in matching single quotes (
') or double quotes ("). They can also be enclosed in matching groups of three single or double quotes (these are generally referred to as triple-quoted strings). The backslash (\) character is used to escape characters that otherwise have a special meaning, such as newline, backslash itself, or the quote character.
