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stack@devstackmac:~/devstack$ sudo PIP_DOWNLOAD_CACHE=/var/cache/pip HTTP_PROXY= HTTPS_PROXY= NO_PROXY= /usr/local/bin/pip install --build=/tmp/pip-build.RMFAI 'prettytable>=0.7'
The directory '/home/stack/.cache/pip/log' or its parent directory is not owned by the current user and the debug log has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want the -H flag.
The directory '/home/stack/.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 the -H flag.
DEPRECATION: --download-cache has been deprecated and will be removed in the future. Pip now automatically uses and configures its cache.
The directory '/home/stack/.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 wit