# Copyright 2019-2020 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.
# You may obtain a copy of the License at
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Random sampling strategy."""
import numpy as np
from asreview.models.query.base import NotProbaQueryStrategy
from asreview.utils import get_random_state
"""Random sampling query strategy.
Randomly select samples with no regard to model assigned probabilities.
Selecting this option means your review is not going to be
accelerated by ASReview.
name = "random"
def __init__(self, random_state=None):
self._random_state = get_random_state(random_state)
def _query(self, X, pool_idx, n_instances=1):
n_samples = len(pool_idx)
query_idx = self._random_state.choice(
np.arange(n_samples), n_instances, replace=False)
return pool_idx[query_idx], X[pool_idx[query_idx]]