Filter  type: None

class lumen.transforms.base.Filter(*, conditions, controls, name)

Filter transform implement the filtering behavior of Filter components.

The filter conditions must be declared as a list of tuple containing the name of the column to be filtered and one of the following:

• scalar: A scalar value will be matched using equality operators

• tuple: A tuple value specifies a numeric or date range.

• list: A list value specifies a set of categories to match against.

• list(tuple): A list of tuples specifies a list of ranges.

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Parameters

conditions

type: list[Any]
default: []
List of filter conditions expressed as tuples of the columnname and the filter value.

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Methods

Filter.apply(df: 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

Filter.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