Python uses requirements Txt installation module

Start the virtual environment where you want to install the module , You can refer to this one ：
https://blog.csdn.net/weixin_44774255/article/details/115491329

After that, when the virtual environment is started ,cd To requirements.txt directory , Run the following command ：

pip install -r requirements.txt -i https://pypi.douban.com/simple/

-i Indicates use of mirror source , The image source of Douban is used here , Modules can be downloaded faster .