lenskit.basic.composite.FallbackScorer
======================================

.. py:class:: lenskit.basic.composite.FallbackScorer(config = None, **kwargs)
   

   Bases: :py:obj:`lenskit.pipeline.Component`\ [\ :py:obj:`lenskit.data.ItemList`\ ]


   Scoring component that fills in missing scores using a fallback.

   :Stability: Caller


   .. py:attribute:: config
      :type:  None

      The component configuration object.  Component classes that support
      configuration **must** redefine this attribute with their specific
      configuration class type, which can be a Python dataclass or a Pydantic
      model class.


   .. py:method:: __call__(primary, backup)

      Run the pipeline's operation and produce a result.  This is the key
      method for components to implement.