Hello, On Sat, 23 Jan 2021 19:04:08 +0900 Inada Naoki <songofaca...@gmail.com> wrote:
> On Sat, Jan 23, 2021 at 10:47 AM Chris Angelico <ros...@gmail.com> > wrote: > > > > > > Highly dubious. I'd rather focus on just moving to UTF-8 as the > > default, rather than bringing in a new function - especially with > > such a confusing name. > > > > What exactly are the blockers on making open(fn) use UTF-8 by > > default? > > Backward compatibility. That's what PEP 597 tries to solve. > > 1. Add optional warning for `open()` call without specifying > `encoding` option. (PEP 597) > 2. (Several years later) Make the warning default. > 3. (Several years later) Change the default encoding. > > When (2) happens, users are forced to write `encoding="utf-8"` to > suppress the warning. > > But note that the default encoding is "utf-8" already in (most) Linux > including WSL, macOS, iOS, and Android. > And Windows user can read ASCII text files without specifying > `encoding` regardless default encoding is legacy codec or "utf-8". > So adding `, encoding="utf-8"` everywhere `open()` is used might be > tedious job. > > On the other hand, if we add `open_text()`: > > * Replacing open with open_text is easier than adding `, > encoding="utf-8"`. How is it easier, if "open_text" exists only in imagination, while encoding="utf-8" has been there all this time? The only easier thing than adding 'encoding="utf-8"' would be: 1. Just go ahead and switch the default encoding to utf-8 right away. 2. For backward compatibility, add "python3 --backward-compatibility" switch. Perhaps even tell users to use it straight in the UnicodeDecodeError backtrace. > * Teachers can teach to use `open_text` to open text files. Students > can use "utf-8" by default without knowing about what encoding is. Let's also add max_int(), min_int(), max_float(), min_float() builtins. Teachers can teach that if you need to min ints, then to use min_int(), if you need to min floats, then to use min_float(), and otherwise, use min(). Bonus point: max_int(), min_int(), max_float(), min_float() are all easier to annotate. > So `open_text()` can provide better developer experience, without > waiting 10 years. Except that in 10 years, when the default encoding is finally changed, open_text() is a useless function, which now needs to be deprecated and all the fun process repeated again. [] -- Best regards, Paul mailto:pmis...@gmail.com _______________________________________________ Python-ideas mailing list -- python-ideas@python.org To unsubscribe send an email to python-ideas-le...@python.org https://mail.python.org/mailman3/lists/python-ideas.python.org/ Message archived at https://mail.python.org/archives/list/python-ideas@python.org/message/23HBISVYGAJ5G25ZPXDNLD4YZX2XXZAQ/ Code of Conduct: http://python.org/psf/codeofconduct/
