# Copyright 2019-2022 The ASReview Authors. All Rights Reserved.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
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# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
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from abc import abstractmethod
from asreview.models.base import BaseModel
"""Abstract class for balance strategies."""
name = "base-balance"
def sample(self, X, y, train_idx):
"""Resample the training data.
Complete feature matrix.
Labels for all papers.
Training indices, that is all papers that have been reviewed.
X_train, y_train: the resampled matrix, labels.