Transformation Function#

TransformationFunction#

hsfs.transformation_function.TransformationFunction(
    featurestore_id,
    transformation_fn=None,
    version=None,
    name=None,
    source_code_content=None,
    builtin_source_code=None,
    output_type=None,
    id=None,
    type=None,
    items=None,
    count=None,
    href=None,
)

Properties#

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id#

Training dataset id.

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version#

Methods#

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delete#

TransformationFunction.delete()

Delete transformation function from backend.

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save#

TransformationFunction.save()

Persist transformation function in backend.

Creation#

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create_transformation_function#

FeatureStore.create_transformation_function(transformation_function, output_type, version=None)

Create a transformation function metadata object.

Lazy

This method is lazy and does not persist the transformation function in the feature store on its own. To materialize the transformation function and save call the save() method of the transformation function metadata object.

Arguments

transformation_function callable: callable object.
output_type Union[str, str, string, bytes, numpy.int8, int8, byte, numpy.int16, int16, short, int, int, numpy.int32, numpy.int64, int64, long, bigint, float, float, numpy.float64, float64, double, datetime.datetime, numpy.datetime64, datetime.date, bool, boolean, bool]: python or numpy output type that will be inferred as pyspark.sql.types type.

Returns:

TransformationFunction: The TransformationFunction metadata object.

Retrieval#

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get_transformation_function#

FeatureStore.get_transformation_function(name, version=None)

Get transformation function metadata object.

Arguments

name str: name of transformation function.
version Optional[int]: version of transformation function. Optional, if not provided all functions that match to provided name will be retrieved .

Returns:

TransformationFunction: The TransformationFunction metadata object.

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get_transformation_functions#

FeatureStore.get_transformation_functions()

Get all transformation functions metadata objects.

Returns:

List[TransformationFunction]. List of transformation function instances.

Transformation Function#