python 虚拟环境搭建

<open cmd>
cd <to your Ryven folder (the outer one)>
python -m venv venv
venv/Scripts/activate            # windows cd venv/Scripts/activate 执行activate.bat
pip install -r requirements.txt  # pip install -r requirements.txt --proxy http://x.x.x.x:8080 --disable-pip-version-check --no-cache-dir