# Suffixer¶

Appends a suffix on features names.

• suffix (str)

## Examples¶

>>> from river import compose

>>> x = {'a': 42, 'b': 12}
>>> compose.Suffixer('_suffix').transform_one(x)
{'a_suffix': 42, 'b_suffix': 12}


## Methods¶

learn_one

Update with a set of features x.

A lot of transformers don't actually have to do anything during the learn_one step because they are stateless. For this reason the default behavior of this function is to do nothing. Transformers that however do something during the learn_one can override this method.

Parameters

• x (dict)

Returns

Transformer: self

transform_one

Transform a set of features x.

Parameters

• x (dict)

Returns

dict: The transformed values.