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Install software to improve speed, you can use the Tsinghua source
pip3 install -i https://pypi.tuna.tsinghua.edu.cn/simple --trusted-host pypi.tuna.tsinghua.edu.cn +模块名（需要的模块名和版本号）In the cmd command line inside, hit the above code, press Enter!
The download module may refer to:
pip3 install -i https://pypi.tuna.tsinghua.edu.cn/simple --trusted-host pypi.tuna.tsinghua.edu.cn django==1.11.11
pip3 install -i https://pypi.tuna.tsinghua.edu.cn/simple --trusted-host pypi.tuna.tsinghua.edu.cn json
pip3 install -i https://pypi.tuna.tsinghua.edu.cn/simple --trusted-host pypi.tuna.tsinghua.edu.cn pymysql