I'm trying to instantiate a composition of transformers.
In native Python this looks like this:
import albumentations as A
transforms = A.Compose([
A.Rotate(limit=10),
A.ToGray(p=1),
])
print(transforms)
output:
Compose([
Rotate(always_apply=False, p=0.5, limit=(-10, 10), interpolation=1, border_mode=4, value=None, mask_value=None),
ToGray(always_apply=False, p=1),
], p=1.0, bbox_params=None, keypoint_params=None, additional_targets={})
I'm trying to instantiate the same transformation with Hydra, but for some reason, the recursive instantiation is failed and only the list of transforms is instantiated but not the outer (A.Compose
) function.
from omegaconf import OmegaConf
import hydra
conf = OmegaConf.create({"compose": {"_traget_": "albumentations.Compose", "_recursive_": True, "transforms": [{"_target_": "albumentations.Rotate", "limit": 10}, {"_target_": "albumentations.ToGray", "p": 1}]}})
print(OmegaConf.to_yaml(conf))
output:
compose:
_traget_: albumentations.Compose
_recursive_: true
transforms:
- _target_: albumentations.Rotate
limit: 10
- _target_: albumentations.ToGray
p: 1
But instantiation is failed:
print(hydra.utils.instantiate(conf.compose))
output:
{'_traget_': 'albumentations.Compose', 'transforms': [Rotate(always_apply=False, p=0.5, limit=(-10, 10), interpolation=1, border_mode=4, value=None, mask_value=None), ToGray(always_apply=False, p=1)]}
Traceback (most recent call last):
File "1.py", line 30, in <module>
print(hydra.utils.instantiate(conf.compose))
File "/home/omry/dev/hydra/hydra/utils.py", line 95, in instantiate
target = _get_target_type(config, kwargs)
File "/home/omry/dev/hydra/hydra/_internal/utils.py", line 640, in _get_target_type
raise InstantiationException("Unable to determine target")
The reason is that your first node does not have a _target_
field, instead it has a _traget_
.
Once you correct this, it works fine.