How to implement datetime or similar custom data types with dataclass structures?

[tbolind]

I have a dataclass that specifies the data types in my yaml config file, but I wish to include a datetime somehow.

My yaml looks something like this:

test_date: ${my_datetime:2011-11-04}
fill_missing_returns_with_zero: True
min_obs: 60
add_constant: False

My dataclass looks something like this:

@dataclass
class StructConf:
    fill_missing_returns_with_zero: bool
    min_obs: int
    add_constant: bool

And finally I wish to somehow put it all together:

    OmegaConf.register_new_resolver("my_datetime", dt.datetime.fromisoformat)
    schema = OmegaConf.structured(StructConf)
    conf = OmegaConf.load("./../config/config.yaml")
    confout = OmegaConf.merge(schema, conf)

However this obviously doesn't work since schema doesn't have the test_date and I do not know how to add it to it? Does anyone have a good suggestion? (Is there a way to combine 2 schemas into 1 and then use that for the merge?

The end result should be that I have an object where test_date should actually be a datetime object such that I can pass the entire configuration object as keyword input to my function.