[Python-ideas] RFC: PEP 540 version 3 (Add a new UTF-8 mode)

[Victor Stinner]

2017-01-12 9:45 GMT+01:00 INADA Naoki <songofacandy at gmail.com>:
> As I described in other thread, LC_COLLATE may cause unintentional performance
> regression and behavior changes.

Since Python 3 uses mostly text, not bytes, LC_COLLATE should not
really impact Python applications. Locales set by setlocale() are not
inherited by child processes.

At least, I understand that setting the locale in Python doesn't
impact the performance of child processes:
--
import locale, subprocess
locale.setlocale(locale.LC_COLLATE, "fr_FR.UTF-8")
subprocess.call("sort long_text.txt > /dev/null", shell=True)
--

But the LC_COLLATE locale can be used by C libraries called from
Python through Python extensions implemented in C.

Victor