# Copyright 2018 The Texar 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
#
# 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,
# 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.
"""
Various agent utilities based on OpenAI Gym.
"""
import gym
__all__ = [
"convert_gym_space",
"get_gym_env_config"
]
[docs]def convert_gym_space(spc):
"""Converts a :gym:`gym.Space <#spaces>` instance to a
:class:`~texar.tf.agents.Space` instance.
Args:
spc: An instance of `gym.Space` or
:class:`~texar.tf.agents.Space`.
"""
from texar.tf.agents.agent_utils import Space
if isinstance(spc, Space):
return spc
if isinstance(spc, gym.spaces.Discrete):
return Space(shape=(), low=0, high=spc.n, dtype=spc.dtype)
elif isinstance(spc, gym.spaces.Box):
return Space(
shape=spc.shape, low=spc.low, high=spc.high, dtype=spc.dtype)
[docs]def get_gym_env_config(env):
"""Creates an instance of :class:`~texar.tf.agents.EnvConfig`
from a :gym:`gym env <#environments>`.
Args:
env: An instance of OpenAI gym Environment.
Returns:
An instance of :class:`~texar.tf.agents.EnvConfig`.
"""
from texar.tf.agents.agent_utils import EnvConfig
return EnvConfig(
action_space=env.action_space,
observ_space=env.observation_space,
reward_range=env.reward_range)