pip install xxx 报错

pip3 install django-oscar
问题：
Could not find a version that satisfies the requirement install (from versions: )
No matching distribution found for install
处理：
pip3 install update django-oscar

问题：
Command "python setup.py egg_info" failed with error code 1 in /private/var/folders/b_/_l0m1cc56kxcwzl688t4qxg40000gn/T/pip-install-owgy24k0/django-extra-views/

处理：
pip3 install --upgrade setuptools