Could not install packages due to an EnvironmentError: [Errno 13] Permission denied: '/usr/local/lib/python3.5/dist-packages/pip/__init__.py' Consider using the `--user` option or check the permissions.

Erro ao actualizar o pip

pip3 install --upgrade pip

Could not install packages due to an EnvironmentError: [Errno 13] Permission denied: '/usr/local/lib/python3.5/dist-packages/pip/__init__.py'
Consider using the `--user` option or check the permissions.

para corrigir

pip3 install --upgrade pip --user