tfx.components.StatisticsGen

Official TFX StatisticsGen component.

Inherits From: BaseComponent, BaseNode

View aliases

Main aliases

tfx.components.statistics_gen.component.StatisticsGen

tfx.components.StatisticsGen(
    examples: tfx.types.Channel = None,
    schema: Optional[tfx.types.Channel] = None,
    stats_options: Optional[tfdv.StatsOptions] = None,
    exclude_splits: Optional[List[Text]] = None,
    output: Optional[tfx.types.Channel] = None,
    input_data: Optional[tfx.types.Channel] = None,
    instance_name: Optional[Text] = None
)

Used in the notebooks

Used in the tutorials
Data validation using TFX Pipeline and TensorFlow Data Validation TFX Estimator Component Tutorial TFX Keras Component Tutorial Graph-based Neural Structured Learning in TFX Feature Engineering using TFX Pipeline and TensorFlow Transform

The StatisticsGen component generates features statistics and random samples over training data, which can be used for visualization and validation. StatisticsGen uses Apache Beam and approximate algorithms to scale to large datasets.

Please see https://www.tensorflow.org/tfx/data_validation for more details.

Example

  # Computes statistics over data for visualization and example validation.
  statistics_gen = StatisticsGen(examples=example_gen.outputs['examples'])

Args
examples	A Channel of ExamplesPath type, likely generated by the ExampleGen component. This needs to contain two splits labeled train and eval. required
schema	A Schema channel to use for automatically configuring the value of stats options passed to TFDV.
stats_options	The StatsOptions instance to configure optional TFDV behavior. When stats_options.schema is set, it will be used instead of the schema channel input. Due to the requirement that stats_options be serialized, the slicer functions and custom stats generators are dropped and are therefore not usable.
exclude_splits	Names of splits where statistics and sample should not be generated. Default behavior (when exclude_splits is set to None) is excluding no splits.
output	ExampleStatisticsPath channel for statistics of each split provided in the input examples.
input_data	Backwards compatibility alias for the examples argument.
instance_name	Optional name assigned to this specific instance of StatisticsGen. Required only if multiple StatisticsGen components are declared in the same pipeline.

Attributes
component_id
component_type
downstream_nodes
exec_properties
id	Node id, unique across all TFX nodes in a pipeline. If id is set by the user, return it directly. otherwise, if instance name (deprecated) is available, node id will be: . otherwise, node id will be:
inputs
outputs
type
upstream_nodes

Child Classes

class DRIVER_CLASS

class SPEC_CLASS

Methods

add_downstream_node

View source

add_downstream_node(
    downstream_node
)

Experimental: Add another component that must run after this one.

This method enables task-based dependencies by enforcing execution order for synchronous pipelines on supported platforms. Currently, the supported platforms are Airflow, Beam, and Kubeflow Pipelines.

Note that this API call should be considered experimental, and may not work with asynchronous pipelines, sub-pipelines and pipelines with conditional nodes. We also recommend relying on data for capturing dependencies where possible to ensure data lineage is fully captured within MLMD.

It is symmetric with add_upstream_node.

Args
downstream_node	a component that must run after this node.

add_upstream_node

View source

add_upstream_node(
    upstream_node
)

Experimental: Add another component that must run before this one.

This method enables task-based dependencies by enforcing execution order for synchronous pipelines on supported platforms. Currently, the supported platforms are Airflow, Beam, and Kubeflow Pipelines.

Note that this API call should be considered experimental, and may not work with asynchronous pipelines, sub-pipelines and pipelines with conditional nodes. We also recommend relying on data for capturing dependencies where possible to ensure data lineage is fully captured within MLMD.

It is symmetric with add_downstream_node.

Args
upstream_node	a component that must run before this node.

from_json_dict

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@classmethod
from_json_dict(
    dict_data: Dict[Text, Any]
) -> Any

Convert from dictionary data to an object.

get_class_type

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@classmethod
get_class_type() -> Text

get_id

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@classmethod
get_id(
    instance_name: Optional[Text] = None
)

Gets the id of a node.

This can be used during pipeline authoring time. For example: from tfx.components import Trainer

resolver = ResolverNode(..., model=Channel( type=Model, producer_component_id=Trainer.get_id('my_trainer')))

Args
instance_name	(Optional) instance name of a node. If given, the instance name will be taken into consideration when generating the id.

Returns
an id for the node.

to_json_dict

View source

to_json_dict() -> Dict[Text, Any]

Convert from an object to a JSON serializable dictionary.

with_id

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with_id(
    id: Text
) -> "BaseNode"

with_platform_config

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with_platform_config(
    config: message.Message
) -> "BaseComponent"

Attaches a proto-form platform config to a component.

The config will be a per-node platform-specific config.

Args
config	platform config to attach to the component.

Returns
the same component itself.

Class Variables
EXECUTOR_SPEC	tfx.dsl.components.base.executor_spec.ExecutorClassSpec