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example: adding CompoundFeature serialization

siibra v0.5 introduced compound features. New serialization strategies and models need to be introduced in order to take full advantage of the introduction of compound features.

Import the new class

api.serialization.util.siibra Serves as the one and single entrypoint to siibra package. To access the new class CompoundFeature, import it here.

# in api.serialization.util.siibra

# ... trimmed for brevity

from siibra.feature.feature import CompoundFeature

Adding serialization model

Next, we define the shape of serialized instances of CompoundFeature.

Since CompoundFeature subclasses Feature, it is quite natural to have the model, CompoundFeatureModel, subclass FeatureModel.

Here, we also added the property subfeature_keys, which is the additional property of CompoundFeatureModel compared to FeatureModel see more detail

# in api.models.features._basetypes.feature

# ... trimmed for brevity

class CompoundFeatureModel(_FeatureModel, type="compound_feature"):
    subfeature_keys: List[str]

Adding serialization strategy

We then add the logic of serialization.

# in api.serialization.features.feature

from api.serialization.util.siibra import CompoundFeature
from api.models.features._basetypes.feature import CompoundFeatureModel

from api.serialization.util import (

@serialize(CompoundFeature, pass_super_model=True)
def serialize_cf(cf: CompoundFeature, detail=False, super_model_dict={}, **kwargs) -> CompoundFeatureModel:
    return CompoundFeatureModel(

Testing the added feature

start the developer server, and try to fetch a new feature.