pip をアップデートしようとしたらハッシュが合わなくて怒られた。 $ pip install -U pip Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple Requirement already satisfied: pip in /usr/lib/python3/dist-packages (20.3.4) Collecting pip WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, s…