def main(policy_file, seed, n_test_rollouts, render):
set_global_seeds(seed)
# Load policy.
with open(policy_file, 'rb') as f:
policy = pickle.load(f)
env_name = policy.info['env_name']
# Prepare params.
params = config.DEFAULT_PARAMS
if env_name in config.DEFAULT_ENV_PARAMS:
params.update(config.DEFAULT_ENV_PARAMS[env_name]
) # merge env-specific parameters in
params['env_name'] = env_name
params = config.prepare_params(params)
config.log_params(params, logger=logger)
dims = config.configure_dims(params)
eval_params = {
'exploit': True,
'use_target_net': params['test_with_polyak'],
'compute_Q': True,
'rollout_batch_size': 1,
'render': bool(render),
}
for name in ['T', 'gamma', 'noise_eps', 'random_eps']:
eval_params[name] = params[name]
evaluator = RolloutWorker(params['make_env'], policy, dims, logger,
**eval_params)
evaluator.seed(seed)
# Run evaluation.
evaluator.clear_history()
for _ in range(n_test_rollouts):
evaluator.generate_rollouts()
# record logs
for key, val in evaluator.logs('test'):
logger.record_tabular(key, np.mean(val))
logger.dump_tabular()
def launch(env_name,
logdir,
n_epochs,
num_cpu,
seed,
replay_strategy,
policy_save_interval,
clip_return,
replay_k,
gg_k,
override_params={},
save_policies=True):
# Fork for multi-CPU MPI implementation.
if num_cpu > 1:
whoami = mpi_fork(num_cpu)
if whoami == 'parent':
sys.exit(0)
import baselines.common.tf_util as U
U.single_threaded_session().__enter__()
rank = MPI.COMM_WORLD.Get_rank()
# Configure logging
if rank == 0:
if logdir or logger.get_dir() is None:
logger.configure(dir=logdir)
else:
logger.configure()
logdir = logger.get_dir()
assert logdir is not None
os.makedirs(logdir, exist_ok=True)
# Seed everything.
rank_seed = seed + 1000000 * rank
set_global_seeds(rank_seed)
# Prepare params.
params = config.DEFAULT_PARAMS
params['env_name'] = env_name
params['replay_strategy'] = replay_strategy
params['replay_k'] = replay_k
params['gg_k'] = gg_k
if env_name in config.DEFAULT_ENV_PARAMS:
params.update(config.DEFAULT_ENV_PARAMS[env_name]
) # merge env-specific parameters in
params.update(
**override_params) # makes it possible to override any parameter
with open(os.path.join(logger.get_dir(), 'params.json'), 'w') as f:
json.dump(params, f)
params = config.prepare_params(params)
config.log_params(params, logger=logger)
if num_cpu == 1:
logger.warn()
logger.warn('*** Warning ***')
logger.warn(
'You are running HER with just a single MPI worker. This will work, but the '
+
'experiments that we report in Plappert et al. (2018, https://arxiv.org/abs/1802.09464) '
+
'were obtained with --num_cpu 19. This makes a significant difference and if you '
+
'are looking to reproduce those results, be aware of this. Please also refer to '
+
'https://github.com/openai/baselines/issues/314 for further details.'
)
logger.warn('****************')
logger.warn()
dims = config.configure_dims(params)
policy = config.configure_ddpg(dims=dims,
params=params,
clip_return=clip_return)
rollout_params = {
'exploit': False,
'use_target_net': False,
'use_demo_states': True,
'compute_Q': True,
'T': params['T'],
'gg_k': params['gg_k'],
'replay_strategy': params['replay_strategy'],
'reward_fun': config.get_reward_fun(params['make_env']),
'd0': params['d0']
}
eval_params = {
'exploit': True,
'use_target_net': params['test_with_polyak'],
'use_demo_states': False,
'compute_Q': True,
'T': params['T'],
'gg_k': params['gg_k'],
'replay_strategy': params['replay_strategy'],
'reward_fun': config.get_reward_fun(params['make_env']),
'd0': params['d0']
}
for name in [
'T', 'rollout_batch_size', 'gamma', 'noise_eps', 'random_eps'
]:
rollout_params[name] = params[name]
eval_params[name] = params[name]
rollout_worker = RolloutWorker(params['make_env'], policy, dims, logger,
**rollout_params)
rollout_worker.seed(rank_seed)
evaluator = RolloutWorker(params['make_env'], policy, dims, logger,
**eval_params)
evaluator.seed(rank_seed)
train(logdir=logdir,
policy=policy,
rollout_worker=rollout_worker,
evaluator=evaluator,
n_epochs=n_epochs,
n_test_rollouts=params['n_test_rollouts'],
n_cycles=params['n_cycles'],
n_batches=params['n_batches'],
policy_save_interval=policy_save_interval,
save_policies=save_policies)