[Python-Dev] PEP 538 warning at startup: please remove it (original) (raw)

Victor Stinner victor.stinner at gmail.com
Mon Jun 12 10:00:14 EDT 2017

2017-06-12 15:28 GMT+02:00 INADA Naoki <songofacandy at gmail.com>:

I like using LANG=C to display a manual page in english. Me too. But we can use LCCTYPE=C.UTF-8 with LANG=C.

My point is that LANG=C is easy to remember and "it just works".

And LCCTYPE=C.UTF-8 is much easier (and ideal) than PYTHONLOCALECOERCIONWARNING=0.

I just propose to remove the warning, so LANG=C would "just works" as well with Python 3.7.

Technically, I know that it's wrong, but it works. I don't see the point of the warning. I'm able to render my hello world with the wrong locale :-) If you want to use C.utf-8, fine, just do it, but don't bug me with locales please :-) Do you mean which? b) don't show warning when locale is coerced.

Always remove the warning.

I consider that I understand well locales and encodings. But now try to imagine someone who don't know anything about programming and starts learning a new language, Python, and see this warning... Locale coercion is for them. Currently (Python 3.6), they will see UnicodeEncodeError. This warning is much helpful than UnicodeEncodeError, because it teaches how to configure UTF-8 locale.

Sorry, I don't understand. Currently, Python 3.7 "just works": it uses UTF-8 when the locale is C and so we don't get any UnicodeError anymore.

Why would user need to be annoyed by a warning while Python just do the "right thing" for them?

And I fear about overriding locale silently.

The thing is nobody understand locales :-) No need to annoy users about locales. Just fix them silently ;-)

But there may be someone who prefer strict, ascii-only C locale. This warning tells how to disable coercion for them.

Users who understand locales don't need such warning. They know how to read a documentation and how to use properly locales :-)

-1 for disable coercion by default: It's too unhelpful for beginners.

Are you proposing to reject the PEP that you approved? Now I'm confused.

Victor

More information about the Python-Dev mailing list