# Copyright 2020,2021 Sony Corporation.
# Copyright 2021,2022,2023 Sony Group Corporation.
#
# 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
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# 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 dataclasses import dataclass
from typing import Dict, Tuple
import numpy as np
from nnabla_rl.environment_explorer import EnvironmentExplorer, EnvironmentExplorerConfig
from nnabla_rl.environments.environment_info import EnvironmentInfo
from nnabla_rl.typing import ActionSelector
@dataclass
class RawPolicyExplorerConfig(EnvironmentExplorerConfig):
pass
[docs]class RawPolicyExplorer(EnvironmentExplorer):
"""Raw policy explorer.
Explore using policy's action without any changes.
Args:
policy_action_selector (:py:class:`ActionSelector <nnabla_rl.typing.ActionSelector>`):
callable which computes current policy's action with respect to current state.
env_info (:py:class:`EnvironmentInfo <nnabla_rl.environments.environment_info.EnvironmentInfo>`):
environment info
config (:py:class:`LinearDecayEpsilonGreedyExplorerConfig\
<nnabla_rl.environment_explorers.RawPolicyExplorerConfig>`): the config of this class.
"""
def __init__(self,
policy_action_selector: ActionSelector,
env_info: EnvironmentInfo,
config: RawPolicyExplorerConfig = RawPolicyExplorerConfig()):
super().__init__(env_info, config)
self._policy_action_selector = policy_action_selector
[docs] def action(self, step: int, state: np.ndarray, *, begin_of_episode: bool = False) -> Tuple[np.ndarray, Dict]:
return self._policy_action_selector(state, begin_of_episode=begin_of_episode)