创建python虚拟环境
virtualenv --python python3.7 venv
source venv/bin/activate
停用虚拟环境
deactivate
更新依赖
pip freeze > requirements.txt
pip install -r requirements.txt
查看依赖
pip list
virtualenv --python python3.7 venv
source venv/bin/activate
deactivate
pip freeze > requirements.txt
pip install -r requirements.txt
pip list