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1# Copyright 2020 Huawei Technologies Co., Ltd
2#
3# Licensed under the Apache License, Version 2.0 (the "License");
4# you may not use this file except in compliance with the License.
5# You may obtain a copy of the License at
6#
7# http://www.apache.org/licenses/LICENSE-2.0
8#
9# Unless required by applicable law or agreed to in writing, software
10# distributed under the License is distributed on an "AS IS" BASIS,
11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12# See the License for the specific language governing permissions and
13# limitations under the License.
14# ============================================================================
15
16"""Base class `PerturbationAttribtuion`"""
17
18from mindspore.train._utils import check_value_type
19from mindspore.nn import Cell
20
21from ..attribution import Attribution
22
23
24class PerturbationAttribution(Attribution):
25    """
26    Base class for perturbation-based attribution methods.
27
28    All perturbation-based _attribution methods extend from this class.
29    """
30
31    def __init__(self,
32                 network,
33                 activation_fn,
34                 perturbation_per_eval,
35                 ):
36        super(PerturbationAttribution, self).__init__(network)
37        check_value_type("activation_fn", activation_fn, Cell)
38        self._activation_fn = activation_fn
39        check_value_type('perturbation_per_eval', perturbation_per_eval, int)
40        if perturbation_per_eval <= 0:
41            raise ValueError('Argument perturbation_per_eval should be a positive integer.')
42        self._perturbation_per_eval = perturbation_per_eval
43