On Tue, Oct 27, 2020 at 5:23 AM Victor Stinner <vstin...@python.org> wrote:
>
> os.get_exec_path() must modify temporarily warnings filters to ignore
> BytesWarning when it looks for 'PATH' (unicode) or b'PATH' (bytes) in
> the 'env' dictionary which may contain unicode or bytes strings.
> Modifying warnings filters impact all threads which is bad.
>
> I dislike having to workaround this annoying behavior for dict lookup
> when -b or -bb is used.
>
Completely agree with you.
> I'm quite sure that almost nobody uses -b or -bb when running their
> test suite or to develop. I expect that nobody uses it. According to
> replies, it seems like porting Python 2 code to Python 3 is the only
> use case. Python 3.9 and older can be used for that, no?
>
I think so. But I became a bit conservative when writing this proposal.
> > When can we remove it? My idea is:
> >
> > 3.10: Deprecate the -b option.
>
> Do you mean writing a message into stderr? Or just deprecate it in the
> documentation?
I thought document only.
>
> > 3.11: Make the -b option no-op. Bytes warning never emits.
> > 3.12: Remove the -b option.
>
> There is no _need_ to raise an error when -b is used. The -t option
> was kept even after the feature was removed (in Python 3.0 ?). -J
> ("used by Jython" says a comment) is a second command line option
> which is silently ignored.
>
I see.
>
> > BytesWarning will be deprecated in the document, but not to be removed.
>
> I don't see what you mean here. I dislike the idea of deprecating a
> feature without scheduling its removal. I don't see the point of
> deprecating it in this case. I only see that as an annoyance.
>
Document only deprecation is useful for readers. Readers can know "I
can just ignore this.".
> I'm fine with removing the exception. If you don't plan to remove it,
> just leave it unchanged (not deprecated), no?
>
OK, my new proposal is:
3.10: Stop emitting BytesWarning for bytes == unicode case, because
this is the most annoying part.
3.11: Stop emitting BytesWarning in core and stdlib.
4.0: Remove `-b` option, `sys.flags.bytes_warning`, and `BytesWarning`.
Regards,
--
Inada Naoki <songofaca...@gmail.com>
_______________________________________________
Python-Dev mailing list -- python-dev@python.org
To unsubscribe send an email to python-dev-le...@python.org
https://mail.python.org/mailman3/lists/python-dev.python.org/
Message archived at
https://mail.python.org/archives/list/python-dev@python.org/message/OQOCZISWWKRFAFMZJI5GMA3SNEQ2TYIJ/
Code of Conduct: http://python.org/psf/codeofconduct/
