def her_td3_experiment(variant):
env = variant['env_class'](**variant['env_kwargs'])
observation_key = variant.get('observation_key', 'observation')
desired_goal_key = variant.get('desired_goal_key', 'desired_goal')
replay_buffer = ObsDictRelabelingBuffer(
env=env,
observation_key=observation_key,
desired_goal_key=desired_goal_key,
**variant['replay_buffer_kwargs']
)
obs_dim = env.observation_space.spaces['observation'].low.size
action_dim = env.action_space.low.size
goal_dim = env.observation_space.spaces['desired_goal'].low.size
if variant['normalize']:
env = NormalizedBoxEnv(env)
exploration_type = variant['exploration_type']
if exploration_type == 'ou':
es = OUStrategy(
action_space=env.action_space,
max_sigma=0.1,
**variant['es_kwargs']
)
elif exploration_type == 'gaussian':
es = GaussianStrategy(
action_space=env.action_space,
max_sigma=0.1,
min_sigma=0.1, # Constant sigma
**variant['es_kwargs'],
)
elif exploration_type == 'epsilon':
es = EpsilonGreedy(
action_space=env.action_space,
prob_random_action=0.1,
**variant['es_kwargs'],
)
else:
raise Exception("Invalid type: " + exploration_type)
qf1 = FlattenMlp(
input_size=obs_dim + action_dim + goal_dim,
output_size=1,
**variant['qf_kwargs']
)
qf2 = FlattenMlp(
input_size=obs_dim + action_dim + goal_dim,
output_size=1,
**variant['qf_kwargs']
)
policy = TanhMlpPolicy(
input_size=obs_dim + goal_dim,
output_size=action_dim,
**variant['policy_kwargs']
)
exploration_policy = PolicyWrappedWithExplorationStrategy(
exploration_strategy=es,
policy=policy,
)
algorithm = HerTd3(
env,
qf1=qf1,
qf2=qf2,
policy=policy,
exploration_policy=exploration_policy,
replay_buffer=replay_buffer,
observation_key=observation_key,
desired_goal_key=desired_goal_key,
**variant['algo_kwargs']
)
if ptu.gpu_enabled():
qf1.to(ptu.device)
qf2.to(ptu.device)
policy.to(ptu.device)
algorithm.to(ptu.device)
algorithm.train()
def experiment(variant):
env = NormalizedBoxEnv(variant['env_class']())
obs_dim = env.observation_space.low.size
action_dim = env.action_space.low.size
variant['algo_kwargs'] = dict(
num_epochs=variant['num_epochs'],
num_steps_per_epoch=variant['num_steps_per_epoch'],
num_steps_per_eval=variant['num_steps_per_eval'],
max_path_length=variant['max_path_length'],
min_num_steps_before_training=variant['min_num_steps_before_training'],
batch_size=variant['batch_size'],
discount=variant['discount'],
replay_buffer_size=variant['replay_buffer_size'],
reward_scale=variant['reward_scale'],
)
M = variant['layer_size']
qf1 = FlattenMlp(
input_size=obs_dim + action_dim,
output_size=1,
hidden_sizes=[M, M],
# **variant['qf_kwargs']
)
qf2 = FlattenMlp(
input_size=obs_dim + action_dim,
output_size=1,
hidden_sizes=[M, M],
# **variant['qf_kwargs']
)
policy = TanhMlpPolicy(
input_size=obs_dim,
output_size=action_dim,
hidden_sizes=[M, M],
# **variant['policy_kwargs']
)
exploration_type = variant['exploration_type']
if exploration_type == 'ou':
es = OUStrategy(action_space=env.action_space)
elif exploration_type == 'gaussian':
es = GaussianStrategy(
action_space=env.action_space,
max_sigma=0.1,
min_sigma=0.1, # Constant sigma
)
elif exploration_type == 'epsilon':
es = EpsilonGreedy(
action_space=env.action_space,
prob_random_action=0.1,
)
else:
raise Exception("Invalid type: " + exploration_type)
exploration_policy = PolicyWrappedWithExplorationStrategy(
exploration_strategy=es,
policy=policy,
)
algorithm = TD3(env,
qf1=qf1,
qf2=qf2,
policy=policy,
exploration_policy=exploration_policy,
**variant['algo_kwargs'])
if ptu.gpu_enabled():
qf1.to(ptu.device)
qf2.to(ptu.device)
policy.to(ptu.device)
algorithm.to(ptu.device)
algorithm.train()
