Re: [PATCH] Use f-strings in python scripts

[Daniel P . Berrangé]

On Wed, Mar 15, 2023 at 08:43:33AM +0100, Philippe Mathieu-Daudé wrote:
> Hi Marco,
> 
> (+Python experts)
> 
> On 13/3/23 18:25, Marco Liebel wrote:
> > Replace python 2 format string with f-strings
> > 
> > Signed-off-by: Marco Liebel <quic_mliebel@quicinc.com>
> > ---
> >   target/hexagon/gen_helper_funcs.py      |  54 ++--
> >   target/hexagon/gen_helper_protos.py     |  10 +-
> >   target/hexagon/gen_idef_parser_funcs.py |   8 +-
> >   target/hexagon/gen_op_attribs.py        |   4 +-
> >   target/hexagon/gen_op_regs.py           |  10 +-
> >   target/hexagon/gen_opcodes_def.py       |   2 +-
> >   target/hexagon/gen_printinsn.py         |  14 +-
> >   target/hexagon/gen_shortcode.py         |   2 +-
> >   target/hexagon/gen_tcg_func_table.py    |   2 +-
> >   target/hexagon/gen_tcg_funcs.py         | 317 +++++++++++-------------
> >   target/hexagon/hex_common.py            |   4 +-
> >   11 files changed, 198 insertions(+), 229 deletions(-)
> 
> These files use a mix of ', " and '''... Since you are modifying
> them, it would be nice to unify. I'm not sure there is a recommended
> style; matter of taste, I find the single quote (') less aggressive,
> then escaping it using ", and keeping ''' for multi-lines strings.

FWIW, rather than debating code style issues and coming up with a custom
set of rules for QEMU python code, my recommendation would be to consider
adopting 'black'

  https://black.readthedocs.io/en/stable/

There is a trend with recent languages to offer an opinionated code
formatting tool as standard to maximise consistency across projects
in a given language. 'black' is a decent attempt to bring this to
the python world. I found it pretty liberating when doing recent
python work in libvirt, to be able to mostly not worry about formatting
anymore.

The main downside is the bulk-reformat in the history, which can
make backports more challenging. For "git blame" you can use the
.git-blame-ignore-revs file to hide the reformats.

With regards,
Daniel
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