Hi, I sent a PR for this (and an additional fix that is needed as of
yesterday):

https://lists.gnu.org/archive/html/qemu-devel/2021-09/msg04477.html

Please drop this patch and prefer that series.

--js

On Fri, Sep 17, 2021 at 12:23 PM Alex Bennée <alex.ben...@linaro.org> wrote:

> From: John Snow <js...@redhat.com>
>
> A few new annoyances. Of note is the new warning for an unspecified
> encoding when opening a text file, which actually does indicate a
> potentially real problem; see
> https://www.python.org/dev/peps/pep-0597/#motivation
>
> Use LC_CTYPE to determine an encoding to use for interpreting QEMU's
> terminal output. Note that Python states: "language code and encoding
> may be None if their values cannot be determined" -- use a platform
> default as a backup.
>
> Signed-off-by: John Snow <js...@redhat.com>
> Message-Id: <20210916040955.628560-2-js...@redhat.com>
> Reviewed-by: Alex Bennée <alex.ben...@linaro.org>
> Tested-by: Alex Bennée <alex.ben...@linaro.org>
> Signed-off-by: Alex Bennée <alex.ben...@linaro.org>
> ---
>  python/qemu/machine/machine.py | 9 ++++++++-
>  python/setup.cfg               | 1 +
>  2 files changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/python/qemu/machine/machine.py
> b/python/qemu/machine/machine.py
> index a7081b1845..51b6e79a13 100644
> --- a/python/qemu/machine/machine.py
> +++ b/python/qemu/machine/machine.py
> @@ -19,6 +19,7 @@
>
>  import errno
>  from itertools import chain
> +import locale
>  import logging
>  import os
>  import shutil
> @@ -290,8 +291,14 @@ def get_pid(self) -> Optional[int]:
>          return self._subp.pid
>
>      def _load_io_log(self) -> None:
> +        # Assume that the output encoding of QEMU's terminal output
> +        # is defined by our locale. If indeterminate, use a platform
> default.
> +        _, encoding = locale.getlocale()
> +        if encoding is None:
> +            encoding = locale.getpreferredencoding(do_setlocale=False)
>          if self._qemu_log_path is not None:
> -            with open(self._qemu_log_path, "r") as iolog:
> +            with open(self._qemu_log_path, "r",
> +                      encoding=encoding) as iolog:
>                  self._iolog = iolog.read()
>
>      @property
> diff --git a/python/setup.cfg b/python/setup.cfg
> index 83909c1c97..0f0cab098f 100644
> --- a/python/setup.cfg
> +++ b/python/setup.cfg
> @@ -104,6 +104,7 @@ good-names=i,
>  [pylint.similarities]
>  # Ignore imports when computing similarities.
>  ignore-imports=yes
> +ignore-signatures=yes
>
>  # Minimum lines number of a similarity.
>  # TODO: Remove after we opt in to Pylint 2.8.3. See commit msg.
> --
> 2.30.2
>
>

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