Transformation

Summary

A Tecton Transformation. Transformations are used encapsulate and share transformation logic between Feature Views.
 
Use the tecton.transformation decorator to create a Transformation.

Attributes

Name	Data Type	Description
created_at	Optional[datetime.datetime]	Returns the time that this Tecton object was created or last updated. None for locally defined objects.
defined_in	Optional[str]	The repo filename where this object was declared. None for locally defined objects.
description	Optional[str]	Returns the description of the Tecton object.
id	str	Returns the unique id of the Tecton object.
info
mode		Transformation mode - Spark, Python, Pyspark, etc.
name	str	Returns the name of the Tecton object.
owner	Optional[str]	Returns the owner of the Tecton object.
prevent_destroy		If set to True, Tecton will block destructive actions taken on this Transformation.
tags	Dict[str, str]	Returns the tags of the Tecton object.
transformation_mode
transformer		The user function for this transformation.
workspace	Optional[str]	Returns the workspace that this Tecton object belongs to. None for locally defined objects.

Methods

Name	Description
__init__(...)	Creates a new Transformation. Use the @transformation decorator to create a Transformation instead of directly
run(...)	Run the transformation against inputs.
summary()	Displays a human-readable summary.
validate()	Method is deprecated and will be removed in a future version. As of Tecton version 1.0, objects are validated upon object creation, so validation is unnecessary.

__init__(...)

Creates a new Transformation. Use the @transformation decorator to create a Transformation instead of directly using this constructor.

Parameters

• name (str) - A unique name of the Transformation.


• description (Optional[str]) - A human-readable description.


• tags (Optional[Dict[str, str]]) - Tags associated with this Tecton Transformation (key-value pairs of arbitrary metadata).


• owner (Optional[str]) - Owner name (typically the email of the primary maintainer).


• prevent_destroy (bool) - If True, this Tecton object will be blocked from being deleted or re-created (i.e. a destructive update) during tecton plan/apply.


• mode (str) - The transformation mode. Valid values are "spark_sql", "pyspark", "snowflake_sql", "snowpark", "python", or "pandas".


• user_function (Callable[...,Union[str, pyspark.sql.DataFrame]]) - The user function for this transformation.


• options (Optional[Dict[str, str]]) - Additional options to configure the Transformation. Used for advanced use cases and beta features. Default: None

run(...)

Run the transformation against inputs.
 
Currently, this method only supports spark_sql, pyspark, and pandas modes.

Parameters

• inputs (Union[pandas.DataFrame, pandas.Series, data_frame.TectonDataFrame, pyspark.sql.DataFrame,Dict, str, int, float, bool]) - positional arguments to the transformation function. For PySpark and SQL transformations, these are either pandas.DataFrame or pyspark.sql.DataFrame objects. For realtime transformations, these are pandas.Dataframe objects.


• context (MaterializationContext) - An optional materialization context object. Default: None

Returns

Union[TectonDataFrame,Dict]

summary()

Displays a human-readable summary.

validate()

Method is deprecated and will be removed in a future version. As of Tecton version 1.0, objects are validated upon object creation, so validation is unnecessary.

Returns

None