[py-usr] flake8 gives me a W605 but Python don't

[Mats Wichmann]

On 9/10/22 13:20, Stefan Ram wrote:
> <c.buhtz at posteo.jp> writes:
>> 'Version: \d+.\d+.\d+.*'
> 
>    All unrecognized escape sequences are left in the string
>    unchanged, i.e., the backslash is left in the result.
> 
>    This behavior is useful when debugging: if an escape
>    sequence is mistyped, the resulting output is more easily
>    recognized as broken.
> 
>    Some Python versions may emit a DeprecationWarning when
>    an unrecognized escape sequence is encountered; future
>    Python versions might emit a SyntaxWarning or SyntaxError.

Consider:

$ /usr/bin/python3.11 -X dev stuff.py
/tmp/stuff.py:4: DeprecationWarning: invalid escape sequence '\d'
   rex = re.compile('Version: \d+.\d+.\d+.*', re.MULTILINE)
Version: 1.2.3