flytekitplugins.spark.sd_transformers

Directory

Classes

Variables

flytekitplugins.spark.sd_transformers.ParquetToSparkDecodingHandler

Helper class that provides a standard way to create an ABC using inheritance.

def ParquetToSparkDecodingHandler()

Extend this abstract class, implement the decode function, and register your concrete class with the StructuredDatasetTransformerEngine class in order for the core flytekit type engine to handle dataframe libraries. This is the decoder interface, meaning it is used when there is a Flyte Literal value, and we have to get a Python value out of it. For the other way, see the StructuredDatasetEncoder

Methods

decode()

def decode(
    ctx: flytekit.core.context_manager.FlyteContext,
    flyte_value: flytekit.models.literals.StructuredDataset,
    current_task_metadata: flytekit.models.literals.StructuredDatasetMetadata,
) -> n: This function can either return an instance of the dataframe that this decoder handles, or an iterator

This is code that will be called by the dataset transformer engine to ultimately translate from a Flyte Literal value into a Python instance.

Properties

flytekitplugins.spark.sd_transformers.SparkDataFrameRenderer

Render a Spark dataframe schema as an HTML table.

Methods

to_html()

def to_html(
    df: pyspark.sql.dataframe.DataFrame,
) -> str

flytekitplugins.spark.sd_transformers.SparkToParquetEncodingHandler

Helper class that provides a standard way to create an ABC using inheritance.

def SparkToParquetEncodingHandler()

Extend this abstract class, implement the encode function, and register your concrete class with the StructuredDatasetTransformerEngine class in order for the core flytekit type engine to handle dataframe libraries. This is the encoding interface, meaning it is used when there is a Python value that the flytekit type engine is trying to convert into a Flyte Literal. For the other way, see the StructuredDatasetEncoder

Methods

encode()

def encode(
    ctx: flytekit.core.context_manager.FlyteContext,
    structured_dataset: flytekit.types.structured.structured_dataset.StructuredDataset,
    structured_dataset_type: flytekit.models.types.StructuredDatasetType,
) -> n: This function should return a StructuredDataset literal object. Do not confuse this with the

Even if the user code returns a plain dataframe instance, the dataset transformer engine will wrap the incoming dataframe with defaults set for that dataframe type. This simplifies this function’s interface as a lot of data that could be specified by the user using the

TODO: Do we need to add a flag to indicate if it was wrapped by the transformer or by the user?

Properties