Diff of Python/Logging

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- https://docs.python.org/ja/3/howto/logging.html

- Pythonでloggingモジュール使ってライブラリ内でログ出力する時のまとめ
--  https://aoishi.hateblo.jp/entry/2017/10/09/021054

- Pythonのloggingをスッキリ使いこなす
--  https://own-search-and-study.xyz/2019/10/20/python-logging-clear/

- ログ出力のための print と import logging はやめてほしい
--  https://qiita.com/amedama/items/b856b2f30c2f38665701