Source code for alf_core.optimizer.acquisition_function

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# Licensed under the Apache License, Version 2.0 (the "License");
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#     http://www.apache.org/licenses/LICENSE-2.0
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import abc

from alf_core.dataclasses import Candidate, LabelledCandidates, State




class AcquisitionFunction(abc.ABC):
    """Abstract base class for acquisition functions."""

    @abc.abstractmethod
    def __call__(
        self,
        search_candidates: list[Candidate],
        state: State,
    ) -> LabelledCandidates:
        """Compute acquisition values for candidates and return them as LabelledCandidates.

        Args:
            search_candidates: List of unlabelled candidates to score.
            state: The task state containing the current datasets and surrogate model.

        Returns:
            Candidates paired with their acquisition values.
        """
        pass