[Python-ideas] PEP 538 (C locale coercion) now depends on PEP 540 (UTF-8 mode)

[INADA Naoki]

I love it

PEP 540 helps using UTF-8 on Python.
PEP 538 helps using UTF-8 on C libraries within Python, too,
(if system supports LC_CTYPE=UTF-8 or C.UTF-8.)

It seems best solution we can do for now.