<img width="1695" alt="image" src="https://user-images.githubusercontent.com/40769240/99659319-a9ae4500-2a9b-11eb-8f04-85797df14da3.png"> pip install -i https://pypi.doubanio.com/simple/ -r requirements.txt
pip install -i https://pypi.doubanio.com/simple/ -r requirements.txt