pip使用豆瓣的镜像源

easy_install -i http://pypi.douban.com/simple/ ipython
pip install -i http://pypi.douban.com/simple/ --trusted-host=pypi.douban.com/simple ipython
pip  install  -i  https://pypi.doubanio.com/simple/  --trusted-host pypi.doubanio.com  django