Datetime object in hydra config

[nilsleh]

I have a class that takes an argument which is a tuple of datetime objects:

from datetime import datetime

class MyClass():
    def __init__(self, time_range: tuple[datetime]):
        self.time_range = time_range

And was wondering if something like this is possible:

my_class:
    _target_: myApp.MyClass
   time_range:
      - _target_: datetime.datetime.strptime
        - "2020-01-01"
        - "%Y-%m-%d"
      - _target_: datetime.datetime.strptime
        - "2020-05-01"
        - "%Y-%m-%d"

To then run

from hydra.utils import instantiate
from omegaconf import OmegaConf

conf = OmegaConf.load(config_path)
my_class = instantiate(conf.my_class)

So far I cannot get it to work, but would appreciate any pointers how one could go about this. Thanks!

[Jasha10]

@nilsleh yes, this is possible using _args_ to pass positional arguments to datetime.datetime.strptime:

my_class:
  _target_: myApp.MyClass
  time_range:
    - _target_: datetime.datetime.strptime
      _args_:
      - "2020-01-01"
      - "%Y-%m-%d"
    - _target_: datetime.datetime.strptime
      _args_:
        - "2020-05-01"
        - "%Y-%m-%d"

Docs on _args_: https://hydra.cc/docs/advanced/instantiate_objects/overview/

[nilsleh]

sorry, I had completely missed _args_ from the documentation site. Thanks so much!