【hydra】基础教程-简易命令行应用

1.安装

pip install hydra-core --upgrade

conf/config.yaml
---------------------------------
db:
  driver: mysql
  user: omry
  pass: secret

my_app.py
---------------------------------------------
import hydra
from omegaconf import DictConfig, OmegaConf

@hydra.main(config_path="conf", config_name="config")
def my_app(cfg : DictConfig) -> None:
    print(OmegaConf.to_yaml(cfg))

if __name__ == "__main__":
    my_app()

执行：

python my_app.py
db:
  driver: mysql
  pass: secret
  user: omry

python my_app.py db.user=root db.pass=1234
db:
  driver: mysql
  user: root
  pass: 1234

Composition example
-------------------------
├── conf
│   ├── config.yaml
│   ├── db
│   │   ├── mysql.yaml
│   │   └── postgresql.yaml
│   └── __init__.py
└── my_app.py

conf/config.yaml
--------------------
defaults:
  - db: mysql