logging.basicConfig() uses locale encoding when reading config file.

We need to add `encoding=None` parameter and `encoding=io.text_encoding(encoding)` in it.

s/basicConfig/fileConfig/

basicConfig() is fixed by fb7869.

New changeset c2b7a66b91cdb96fbfdb160f96797208ddc5e436 by Inada Naoki in branch 'master':
bpo-43731: Add an `encoding` parameter to logging.fileConfig() (GH-25273)
https://github.com/python/cpython/commit/c2b7a66b91cdb96fbfdb160f96797208ddc5e436

> fileConfig(fname, defaults=None, disable_existing_loggers=True, encoding=None)

If "locale" is the intended default, why not being more explicit and use encoding="locale"?

If we use `encoding="locale"` by default, EncodingWarning will be not be emitted  even when user omit `encoding` option.

Ah, so you want to emit an EncodingWarning when fileConfig(filename) is called without specifying an encoding, right?

> Ah, so you want to emit an EncodingWarning when fileConfig(filename) is called without specifying an encoding, right?

Yes, but only when the user uses `PYTHONWARNDEFAULTENCODING`.

I already added `export PYTHONWARNDEFAULTENCODING=1` in `.bashrc` in my mac and Linux machine.

In the future, config file should be read with UTF-8 by default.