On Tue, Feb 9, 2021 at 9:31 PM Paul Moore <p.f.mo...@gmail.com> wrote:
>
> Personally, I'm not at all keen on the idea of making users always
> specify encoding in the first place, even if it's "just for the
> transition".
I agree with you. But as I wrote in the PEP, omitted encoding caused
much troubles already.
Windows users can not just `pip install somepkg` because some library
authors write `long_description=open("README.md").read()` in setup.py.
I am trying to fix this situation by two parallel approaches:
* (This PEP) Provide a tool for finding this type of bugs, and
recommend `encoding="utf-8"` for cross-platform library authors.
* (Author thread) Make UTF-8 mode more usable for Windows users,
especially students.
> If we want to switch the default encoding from the locale encoding to
> UTF-8, we should find a way to do that which *doesn't* mean that
> there's a "transitional" state where using the default is considered
> bad practice. That helps no-one, and just adds confusion, which will
> last far longer than that one release (there will be people
> encountering StackOverflow questions on the topic long after the
> default has changed).
>
> Maybe we just have to accept that we can't work out what people are
> intending, and just state in advance in the documentation that the
> default will change, then it's documented as an upcoming breaking
> change that people can address (if they read the release notes, but we
> seem to be assuming they'll spot a warning, so why not assume they
> read the release notes, too?).
>
This PEP doesn't cover how to change the default encoding. So this is
slightly off topic.
I have two ideas for changing the default encoding:
(a) Regular deprecation period: Emitting EncodingWarning by default
(3.14 or later), and change the default encoding later (3.17 or
later).
(b) Enable UTF-8 mode default on Windows. Users can disable UTF-8 mode
for backward compatibility.
Steve Dower againsted to (b) very strongly. He suggested to emit
DeprecationWarning.
https://discuss.python.org/t/pep-597-enable-utf-8-mode-by-default-on-windows/3122/16
On the other hand, some core-dev don't like emitting Warning for all
omitted `encoding` option.
So I don't have strong opinion about which approach is better. I want
to see how EncodingWarning and UTF-8 mode are adopted.
I want to implement both EncodingWarning and per-site UTF-8 mode
setting in Python 3.10.
5+ years later, we will see which approach is adopted by users.
* If EncodingWarning is widely adopted by many developers, we can
discuss approach (a).
* If UTF-8 mode becomes the best practice for Windows users, we can
discuss approach (b).
Regards,
--
Inada Naoki <songofaca...@gmail.com>
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