1. mac
Create a new pip.conf in local machine config-file
MAC: /Library/Application Support/pip/pip.conf
pip config list -v
进入中间有空格的文件夹：
cd ~/'Library/Application Support/'
[global]
index-url = https://pypi.python.org/simple
extra-index-url = https://<USERNAME>:<PASSWORD>@artifacts-we1.farfetch.net/artifactory/api/pypi/pypi-stable/simple3