Mac 下安装pip

在mac 10.12.6版本下brew install pip 安装失败：

报错：

Error: No available formula with the name "pip" Homebrew provides pip via: `brew install python`. However you will thenhave two Pythons installed on your Mac, so alternatively you can installpip via the instructions at:  https://pip.readthedocs.io/en/stable/installing/

解决方法：

sudo easy_install pip