Re: [committed] libstdc++: Reformat Python code

[Jonathan Wakely <jwakely@redhat.com>]

On Mon, 13 Nov 2023 at 14:41, Romain GEISSLER
<romain.geissler@amadeus.com> wrote:
>
> > Le 28 sept. 2023 à 22:21, Jonathan Wakely <jwakely redhat ! com> a écrit :
> >
> > Tested x86_64-linux (GDB 13.2, Python 3.11). Pushed to trunk.
> >
> > -- >8 --
> >
> > Some of these changes were suggested by autopep8's --aggressive
> > option, others are for readability.
> >
> > Break long lines by splitting strings across multiple lines, or
> > introducing local variables to hold results.
> >
> > Use raw strings for regular expressions, so that backslashes don't need
> > to be escaped.
>
> Hi Jonathan,
>
> FYI, it seems that with python 3.12, the bits "Use raw strings for regular expressions"
> seems to fix the following new Python warnings:
>
> /opt/1A/toolchain/x86_64-v23.0.19/lib/../share/gcc-13.2.1/python/libstdcxx/v6/printers.py:1273: SyntaxWarning: invalid escape sequence '\d'
>   self.typename = re.sub('^std::experimental::fundamentals_v\d::', 'std::experimental::', self.typename, 1)
> /opt/1A/toolchain/x86_64-v23.0.19/lib/../share/gcc-13.2.1/python/libstdcxx/v6/printers.py:1302: SyntaxWarning: invalid escape sequence '\w'
>   x = re.sub("std::string(?!\w)", s, m.group(1))
>  … (snapped, there are a bit more than that in total).
>
> How ok would it be to backport to the branches still maintained the "raw string" fix,
> in order to avoid deprecation warnings as soon as people use gdb with python >= 3.12 ?

Yes, I'll do that backport (and most of the other Python improvements
too, at least for gcc-13).

Thanks for raising it.