[sudo] hogehoge のパスワード:
The directory '/home/hogehoge/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/home/hogehoge/.cache/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Collecting qrcode
Downloading qrcode-5.3-py2.py3-none-any.whl
Requirement already satisfied (use --upgrade to upgrade): six in ./.local/lib/python2.7/site-packages (from qrcode)
Installing collected packages: qrcode
Successfully installed qrcode-5.3