Columns  type: columns

class lumen.transforms.base.Columns(*, columns, controls, name)

Columns selects a subset of columns.

df[<columns>]

---

Parameters

columns

type: Any
default: None
Possible values: ``
The subset of columns to select.

---

Methods

Columns.apply(table: DataFrame) → DataFrame

Given a table transform it in some way and return it.

Parameters:

table (DataFrame) – The queried table as a DataFrame.

Returns:

A DataFrame containing the transformed data.

Return type:

DataFrame

Columns.to_spec(context: Dict[str, Any] | None = None) → Dict[str, Any]

Exports the full specification to reconstruct this component.

Return type:

Resolved and instantiated Component object