fl4health.feature_alignment.string_columns_transformer module¶

class TextColumnTransformer(transformer)[source]¶

Bases: BaseEstimator, TransformerMixin

__init__(transformer)[source]¶

The purpose of this class is to enable the application of text feature transformers from sklearn to a single-column pandas dataframe, which is not supported in the first place.

Parameters:: transformer (TextFeatureTransformer) – Transformer to be applied

fit(X, y=None)[source]¶

Fit the transformer to the provided dataframe. The dataframe should have a single string column The transformer is fit on the text from the single columns in the X dataframe

Parameters:

X (pd.DataFrame) – Column on which to fit the transformer
y (pd.DataFrame | None, optional) – Not used. Defaults to None.

Returns:

The fit transformer

Return type:

TextColumnTransformer

transform(X)[source]¶

Transforms the concatenation of a single column of text in the X dataframe

Parameters:: X (pd.DataFrame) – Dataframe of text-based column to be transformed
Returns:: Transformed dataframe.
Return type:: pd.DataFrame

class TextMulticolumnTransformer(transformer)[source]¶

Bases: BaseEstimator, TransformerMixin

__init__(transformer)[source]¶

The purpose of this class is to enable the application of text feature transformers from sklearn to multiple string columns, which is not supported in the first place.

Parameters:: transformer (TextFeatureTransformer) – Transformer to be applied

fit(X, y=None)[source]¶

Fit the transformer to the provided dataframe. The dataframe should have multiple string columns The transformer is fit on the appended text from all columns in the X dataframe

Parameters:

X (pd.DataFrame) – Columns on which to fit the transformer
y (pd.DataFrame | None, optional) – Not used. Defaults to None.

Returns:

The fit transformer

Return type:

TextMulticolumnTransformer

transform(X)[source]¶

Transforms the concatenation of all columns of text in the X dataframe

Parameters:: X (pd.DataFrame) – Dataframe of text-based columns to be transformed
Returns:: Transformed dataframe.
Return type:: pd.DataFrame