1. mac安装python
https://blog.csdn.net/xuanlv_haoshao/article/details/82316766
mac 安装pip
curl https://bootstrap.pypa.io/get-pip.py | python3
安装完后，查看版本
pip --version>>> import sys
>>> sys.path
['', 'C:\\Python27\\Lib\\idlelib', 'C:\\Python27\\lib\\site-packages\\robotframework_selenium2library-1.5.0-py2.7.egg', 'C:\\Python27\\lib\\site-packages\\docutils-0.14-py2.7.egg', 'C:\\Python27\\lib\\site-packages\\decorator-4.2.1-py2.7.egg', 'C:\\Windows\\system32\\python27.zip', 'C:\\Python27\\DLLs', 'C:\\Python27\\lib', 'C:\\Python27\\lib\\plat-win', 'C:\\Python27\\lib\\lib-tk', 'C:\\Python27', 'C:\\Python27\\lib\\site-packages', 'C:\\Python27\\lib\\site-packages\\win32', 'C:\\Python27\\lib\\site-packages\\win32\\lib', 'C:\\Python27\\lib\\site-packages\\Pythonwin', 'C:\\Python27\\lib\\site-packages\\wx-2.8-msw-unicode']
2. 设置镜像源，设置超时时间
pip install -i https://pypi.tuna.tsinghua.edu.cn/simple --default-timeout=100 库名
3. 修改镜像源
pip install pip -U
pip config set global.index-url https://pypi.tuna.tsinghua.edu.cn/simple
