Convert hydra/omegaconf config to python nested dict/list?

Question

I'd like to convert a OmegaConf/Hydra config to a nested dictionary/list. How can I do this?

Really

Does this answer your question? Converting a YAML file to Python JSON object – Rosenstein

Answer 1

See OmegaConf.to_container().

Usage snippet:

>>> conf = OmegaConf.create({"foo": "bar", "foo2": "${foo}"})
>>> assert type(conf) == DictConfig
>>> primitive = OmegaConf.to_container(conf)
>>> show(primitive)
type: dict, value: {'foo': 'bar', 'foo2': '${foo}'}
>>> resolved = OmegaConf.to_container(conf, resolve=True)
>>> show(resolved)
type: dict, value: {'foo': 'bar', 'foo2': 'bar'}

Delouse

Snippet: from omegaconf import OmegaConf; OmegaConf.to_container(cfg) – Jhelum

Added usage snippet to answer. – Delouse

wonder why resolve=True is not the default. – Jessiajessica

resolving interpolations is a destructive operation that is changing the semantics of the config. e.g. modifying foo in the original config will change both foo and foo2 but it does not hold the same way after you resolve. – Delouse

what is show? – Bailsman

A one-liner to print the object and the type. defined in the linked doc page. – Delouse

Answer 2

One can simply convert from omegaconf to python dictionary by dict(). Follow the example given below:

>>> type(config)
<class 'omegaconf.dictconfig.DictConfig'>
>>> config
{'host': '0.0.0.0', 'port': 8000, 'app': 'main:app', 'reload': False, 'debug': False}
>>> dict(config)
{'host': '0.0.0.0', 'port': 8000, 'app': 'main:app', 'reload': False, 'debug': False}
>>> type(dict(config))
<class 'dict'>

Historiography

This does not convert nested DictConfig objects inside the top-level object – Littman