def __init__(
self, batch_size, observation_space, action_space, policy_hparams,
policy_dir, sampling_temp
):
super(PolicyAgent, self).__init__(
batch_size, observation_space, action_space
)
self._sampling_temp = sampling_temp
with tf.Graph().as_default():
self._observations_t = tf.placeholder(
shape=((batch_size,) + self.observation_space.shape),
dtype=self.observation_space.dtype
)
(logits, self._values_t) = rl.get_policy(
self._observations_t, policy_hparams, self.action_space
)
actions = common_layers.sample_with_temperature(logits, sampling_temp)
self._probs_t = tf.nn.softmax(logits / sampling_temp)
self._actions_t = tf.cast(actions, tf.int32)
model_saver = tf.train.Saver(
tf.global_variables(policy_hparams.policy_network + "/.*") # pylint: disable=unexpected-keyword-arg
)
self._sess = tf.Session()
self._sess.run(tf.global_variables_initializer())
trainer_lib.restore_checkpoint(policy_dir, model_saver, self._sess)
def evaluate(self, env_fn, hparams, stochastic):
if stochastic:
policy_to_actions_lambda = lambda policy: policy.sample()
else:
policy_to_actions_lambda = lambda policy: policy.mode()
with tf.Graph().as_default():
with tf.name_scope("rl_eval"):
eval_env = env_fn(in_graph=True)
(collect_memory, _, collect_init) = _define_collect(
eval_env,
hparams,
"ppo_eval",
eval_phase=True,
frame_stack_size=self.frame_stack_size,
force_beginning_resets=False,
policy_to_actions_lambda=policy_to_actions_lambda)
model_saver = tf.train.Saver(
tf.global_variables(".*network_parameters.*"))
with tf.Session() as sess:
sess.run(tf.global_variables_initializer())
collect_init(sess)
trainer_lib.restore_checkpoint(self.agent_model_dir, model_saver,
sess)
sess.run(collect_memory)
def _run_train(ppo_hparams,
event_dir,
model_dir,
restarter,
train_summary_op,
eval_summary_op,
initializers,
report_fn=None):
"""Train."""
summary_writer = tf.summary.FileWriter(event_dir,
graph=tf.get_default_graph(),
flush_secs=60)
model_saver = tf.train.Saver(
tf.global_variables(ppo_hparams.policy_network + "/.*") +
tf.global_variables("training/" + ppo_hparams.policy_network + "/.*") +
# tf.global_variables("clean_scope.*") + # Needed for sharing params.
tf.global_variables("global_step") +
tf.global_variables("losses_avg.*") +
tf.global_variables("train_stats.*"))
global_step = tf.train.get_or_create_global_step()
with tf.control_dependencies([tf.assign_add(global_step, 1)]):
train_summary_op = tf.identity(train_summary_op)
with tf.Session() as sess:
sess.run(tf.global_variables_initializer())
for initializer in initializers:
initializer(sess)
trainer_lib.restore_checkpoint(model_dir, model_saver, sess)
num_target_iterations = restarter.target_local_step
num_completed_iterations = num_target_iterations - restarter.steps_to_go
with restarter.training_loop():
for epoch_index in range(num_completed_iterations,
num_target_iterations):
summary = sess.run(train_summary_op)
if summary_writer:
summary_writer.add_summary(summary, epoch_index)
if (ppo_hparams.eval_every_epochs
and epoch_index % ppo_hparams.eval_every_epochs == 0):
eval_summary = sess.run(eval_summary_op)
if summary_writer:
summary_writer.add_summary(eval_summary, epoch_index)
if report_fn:
summary_proto = tf.Summary()
summary_proto.ParseFromString(eval_summary)
for elem in summary_proto.value:
if "mean_score" in elem.tag:
report_fn(elem.simple_value, epoch_index)
break
if (model_saver and ppo_hparams.save_models_every_epochs and
(epoch_index % ppo_hparams.save_models_every_epochs == 0 or
(epoch_index + 1) == num_target_iterations)):
ckpt_path = os.path.join(
model_dir, "model.ckpt-{}".format(
tf.train.global_step(sess, global_step)))
model_saver.save(sess, ckpt_path)
def initialize(self, sess):
model_loader = tf.train.Saver(
var_list=tf.global_variables(scope="next_frame*") # pylint:disable=unexpected-keyword-arg
)
trainer_lib.restore_checkpoint(
self._model_dir, saver=model_loader, sess=sess, must_restore=True
)
def evaluate(self, env_fn, hparams, sampling_temp):
with tf.Graph().as_default():
with tf.name_scope("rl_eval"):
eval_env = env_fn(in_graph=True)
(collect_memory, _, collect_init) = _define_collect(
eval_env,
hparams,
"ppo_eval",
eval_phase=True,
frame_stack_size=self.frame_stack_size,
force_beginning_resets=False,
sampling_temp=sampling_temp,
distributional_size=self._distributional_size,
)
model_saver = tf.train.Saver(
tf.global_variables(hparams.policy_network + "/.*")
# tf.global_variables("clean_scope.*") # Needed for sharing params.
)
with tf.Session() as sess:
sess.run(tf.global_variables_initializer())
collect_init(sess)
trainer_lib.restore_checkpoint(self.agent_model_dir,
model_saver, sess)
sess.run(collect_memory)
def initialize(self, sess):
model_loader = tf.train.Saver(
var_list=tf.global_variables(scope="next_frame*") # pylint:disable=unexpected-keyword-arg
)
trainer_lib.restore_checkpoint(
self._model_dir, saver=model_loader, sess=sess, must_restore=True
)
def encode_dataset(model, dataset, problem, ae_hparams, autoencoder_path,
out_files):
"""Encode all frames in dataset with model and write them out to out_files."""
batch_size = 8
dataset = dataset.batch(batch_size)
examples = dataset.make_one_shot_iterator().get_next()
images = examples.pop("frame")
images = tf.cast(images, tf.int32)
encoded = model.encode(images)
encoded_frame_height = int(
math.ceil(problem.frame_height / 2**ae_hparams.num_hidden_layers))
encoded_frame_width = int(
math.ceil(problem.frame_width / 2**ae_hparams.num_hidden_layers))
num_bits = 8
encoded = tf.reshape(
encoded, [-1, encoded_frame_height, encoded_frame_width, 3, num_bits])
encoded = tf.cast(discretization.bit_to_int(encoded, num_bits), tf.uint8)
pngs = tf.map_fn(tf.image.encode_png,
encoded,
dtype=tf.string,
back_prop=False)
with tf.Session() as sess:
autoencoder_saver = tf.train.Saver(
tf.global_variables("autoencoder.*"))
trainer_lib.restore_checkpoint(autoencoder_path,
autoencoder_saver,
sess,
must_restore=True)
def generator():
"""Generate examples."""
while True:
try:
pngs_np, examples_np = sess.run([pngs, examples])
rewards = examples_np["reward"].tolist()
actions = examples_np["action"].tolist()
frame_numbers = examples_np["frame_number"].tolist()
for action, reward, frame_number, png in \
zip(actions, rewards, frame_numbers, pngs_np):
yield {
"action": action,
"reward": reward,
"frame_number": frame_number,
"image/encoded": [png],
"image/format": ["png"],
"image/height": [encoded_frame_height],
"image/width": [encoded_frame_width],
}
except tf.errors.OutOfRangeError:
break
generator_utils.generate_files(
generator(),
out_files,
cycle_every_n=problem.total_number_of_frames // 10)
def train(hparams, event_dir=None, model_dir=None,
restore_agent=True, epoch=0):
"""Train."""
with tf.name_scope("rl_train"):
train_summary_op, _, initialization = define_train(hparams, event_dir)
if event_dir:
summary_writer = tf.summary.FileWriter(
event_dir, graph=tf.get_default_graph(), flush_secs=60)
if model_dir:
model_saver = tf.train.Saver(
tf.global_variables(".*network_parameters.*"))
else:
summary_writer = None
model_saver = None
# TODO(piotrmilos): This should be refactored, possibly with
# handlers for each type of env
if hparams.environment_spec.simulated_env:
env_model_loader = tf.train.Saver(
tf.global_variables("next_frame*"))
else:
env_model_loader = None
with tf.Session() as sess:
sess.run(tf.global_variables_initializer())
initialization(sess)
if env_model_loader:
trainer_lib.restore_checkpoint(
hparams.world_model_dir, env_model_loader, sess, must_restore=True)
start_step = 0
if model_saver and restore_agent:
start_step = trainer_lib.restore_checkpoint(
model_dir, model_saver, sess)
# Fail-friendly, don't train if already trained for this epoch
if start_step >= ((hparams.epochs_num * (epoch + 1))):
tf.logging.info("Skipping PPO training for epoch %d as train steps "
"(%d) already reached", epoch, start_step)
return
for epoch_index in range(hparams.epochs_num):
summary = sess.run(train_summary_op)
if summary_writer:
summary_writer.add_summary(summary, epoch_index)
if (hparams.eval_every_epochs and
epoch_index % hparams.eval_every_epochs == 0):
if summary_writer and summary:
summary_writer.add_summary(summary, epoch_index)
else:
tf.logging.info("Eval summary not saved")
if (model_saver and hparams.save_models_every_epochs and
(epoch_index % hparams.save_models_every_epochs == 0 or
(epoch_index + 1) == hparams.epochs_num)):
ckpt_path = os.path.join(
model_dir, "model.ckpt-{}".format(epoch_index + 1 + start_step))
model_saver.save(sess, ckpt_path)
def train(hparams,
environment_spec,
event_dir=None,
model_dir=None,
restore_agent=True):
"""Train."""
with tf.name_scope("rl_train"):
train_summary_op, eval_summary_op = define_train(
hparams, environment_spec, event_dir)
if event_dir:
summary_writer = tf.summary.FileWriter(
event_dir, graph=tf.get_default_graph(), flush_secs=60)
if model_dir:
model_saver = tf.train.Saver(
tf.global_variables(".*network_parameters.*"))
else:
summary_writer = None
model_saver = None
if hparams.simulated_environment:
env_model_loader = tf.train.Saver(
tf.global_variables("basic_conv_gen.*"))
else:
env_model_loader = None
with tf.Session() as sess:
sess.run(tf.global_variables_initializer())
if env_model_loader:
trainer_lib.restore_checkpoint(hparams.world_model_dir,
env_model_loader,
sess,
must_restore=True)
start_step = 0
if model_saver and restore_agent:
start_step = trainer_lib.restore_checkpoint(
model_dir, model_saver, sess)
for epoch_index in range(hparams.epochs_num):
summary = sess.run(train_summary_op)
if summary_writer:
summary_writer.add_summary(summary, epoch_index)
if (hparams.eval_every_epochs
and epoch_index % hparams.eval_every_epochs == 0):
summary = sess.run(eval_summary_op)
if summary_writer and summary:
summary_writer.add_summary(summary, epoch_index)
else:
tf.logging.info("Eval summary not saved")
if (model_saver and hparams.save_models_every_epochs and
(epoch_index % hparams.save_models_every_epochs == 0 or
(epoch_index + 1) == hparams.epochs_num)):
ckpt_path = os.path.join(
model_dir,
"model.ckpt-{}".format(epoch_index + start_step))
model_saver.save(sess, ckpt_path)
def initialize(self, sess):
model_loader = tf.train.Saver(
var_list=tf.global_variables(scope="next_frame*") # pylint:disable=unexpected-keyword-arg
)
# TODO(afrozm): use TF methods to be on the safe side here.
if os.path.isdir(self._model_dir):
trainer_lib.restore_checkpoint(self._model_dir,
saver=model_loader,
sess=sess,
must_restore=True)
else:
model_loader.restore(sess=sess, save_path=self._model_dir)
def encode_dataset(model, dataset, problem, ae_hparams, autoencoder_path,
out_files):
"""Encode all frames in dataset with model and write them out to out_files."""
batch_size = 8
dataset = dataset.batch(batch_size)
examples = dataset.make_one_shot_iterator().get_next()
images = examples.pop("frame")
images = tf.expand_dims(images, 1)
encoded = model.encode(images)
encoded_frame_height = int(
math.ceil(problem.frame_height / 2**ae_hparams.num_hidden_layers))
encoded_frame_width = int(
math.ceil(problem.frame_width / 2**ae_hparams.num_hidden_layers))
num_bits = 8
encoded = tf.reshape(
encoded, [-1, encoded_frame_height, encoded_frame_width, 3, num_bits])
encoded = tf.cast(discretization.bit_to_int(encoded, num_bits), tf.uint8)
pngs = tf.map_fn(tf.image.encode_png, encoded, dtype=tf.string,
back_prop=False)
with tf.Session() as sess:
autoencoder_saver = tf.train.Saver(tf.global_variables("autoencoder.*"))
trainer_lib.restore_checkpoint(autoencoder_path, autoencoder_saver, sess,
must_restore=True)
def generator():
"""Generate examples."""
while True:
try:
pngs_np, examples_np = sess.run([pngs, examples])
rewards_np = [list(el) for el in examples_np["reward"]]
actions_np = [list(el) for el in examples_np["action"]]
pngs_np = [el for el in pngs_np]
for action, reward, png in zip(actions_np, rewards_np, pngs_np):
yield {
"action": action,
"reward": reward,
"image/encoded": [png],
"image/format": ["png"],
"image/height": [encoded_frame_height],
"image/width": [encoded_frame_width],
}
except tf.errors.OutOfRangeError:
break
generator_utils.generate_files(
generator(), out_files,
cycle_every_n=problem.total_number_of_frames // 10)
def evaluate(hparams, model_dir, name_scope="rl_eval"):
"""Evaluate."""
hparams = copy.copy(hparams)
hparams.add_hparam("eval_phase", True)
with tf.Graph().as_default():
with tf.name_scope(name_scope):
(collect_memory, _,
collect_init) = collect.define_collect(hparams, "ppo_eval")
model_saver = tf.train.Saver(
tf.global_variables(".*network_parameters.*"))
with tf.Session() as sess:
sess.run(tf.global_variables_initializer())
collect_init(sess)
trainer_lib.restore_checkpoint(model_dir, model_saver, sess)
sess.run(collect_memory)
def _run_train(ppo_hparams,
event_dir,
model_dir,
num_target_iterations,
train_summary_op,
eval_summary_op,
initializers,
report_fn=None):
"""Train."""
summary_writer = tf.summary.FileWriter(event_dir,
graph=tf.get_default_graph(),
flush_secs=60)
model_saver = tf.train.Saver(tf.global_variables(".*network_parameters.*"))
with tf.Session() as sess:
sess.run(tf.global_variables_initializer())
for initializer in initializers:
initializer(sess)
num_completed_iterations = trainer_lib.restore_checkpoint(
model_dir, model_saver, sess)
# Fail-friendly, complete only unfinished epoch
num_iterations_to_go = num_target_iterations - num_completed_iterations
if num_iterations_to_go <= 0:
tf.logging.info(
"Skipping PPO training. Requested %d iterations while %d train "
"iterations already reached", num_target_iterations,
num_completed_iterations)
return
for epoch_index in range(num_iterations_to_go):
summary = sess.run(train_summary_op)
if summary_writer:
summary_writer.add_summary(summary, epoch_index)
if (ppo_hparams.eval_every_epochs
and epoch_index % ppo_hparams.eval_every_epochs == 0):
eval_summary = sess.run(eval_summary_op)
if summary_writer:
summary_writer.add_summary(eval_summary, epoch_index)
if report_fn:
summary_proto = tf.Summary()
summary_proto.ParseFromString(eval_summary)
for elem in summary_proto.value:
if "mean_score" in elem.tag:
report_fn(elem.simple_value, epoch_index)
break
epoch_index_and_start = epoch_index + num_completed_iterations
if (model_saver and ppo_hparams.save_models_every_epochs and
(epoch_index_and_start % ppo_hparams.save_models_every_epochs
== 0 or (epoch_index + 1) == num_iterations_to_go)):
ckpt_path = os.path.join(
model_dir,
"model.ckpt-{}".format(epoch_index + 1 +
num_completed_iterations))
model_saver.save(sess, ckpt_path)
def __init__(self,
environment_spec,
batch_size,
model_dir=None,
sess=None):
self.batch_size = batch_size
with tf.Graph().as_default():
self._batch_env = SimulatedBatchEnv(environment_spec,
self.batch_size)
self.action_space = self._batch_env.action_space
# TODO(kc): check for the stack wrapper and correct number of channels in
# observation_space
self.observation_space = self._batch_env.observ_space
self._sess = sess if sess is not None else tf.Session()
self._to_initialize = [self._batch_env]
environment_wrappers = environment_spec.wrappers
wrappers = copy.copy(
environment_wrappers) if environment_wrappers else []
for w in wrappers:
self._batch_env = w[0](self._batch_env, **w[1])
self._to_initialize.append(self._batch_env)
self._sess.run(tf.global_variables_initializer())
for wrapped_env in self._to_initialize:
wrapped_env.initialize(self._sess)
self._actions_t = tf.placeholder(shape=(batch_size, ),
dtype=tf.int32)
self._rewards_t, self._dones_t = self._batch_env.simulate(
self._actions_t)
self._obs_t = self._batch_env.observ
self._reset_op = self._batch_env.reset(
tf.range(batch_size, dtype=tf.int32))
env_model_loader = tf.train.Saver(
var_list=tf.global_variables(scope="next_frame*")) # pylint:disable=unexpected-keyword-arg
trainer_lib.restore_checkpoint(model_dir,
saver=env_model_loader,
sess=self._sess,
must_restore=True)
def __init__(self, hparams, action_space, observation_space, policy_dir):
assert hparams.base_algo == "ppo"
ppo_hparams = trainer_lib.create_hparams(hparams.base_algo_params)
frame_stack_shape = (
1, hparams.frame_stack_size) + observation_space.shape
self._frame_stack = np.zeros(frame_stack_shape, dtype=np.uint8)
with tf.Graph().as_default():
self.obs_t = tf.placeholder(shape=self.frame_stack_shape,
dtype=np.uint8)
self.logits_t, self.value_function_t = get_policy(
self.obs_t, ppo_hparams, action_space)
model_saver = tf.train.Saver(
tf.global_variables(scope=ppo_hparams.policy_network + "/.*") # pylint: disable=unexpected-keyword-arg
)
self.sess = tf.Session()
self.sess.run(tf.global_variables_initializer())
trainer_lib.restore_checkpoint(policy_dir, model_saver, self.sess)
def train(hparams,
event_dir=None,
model_dir=None,
restore_agent=True,
name_scope="rl_train",
report_fn=None):
"""Train."""
with tf.Graph().as_default():
with tf.name_scope(name_scope):
train_summary_op, eval_summary_op, initializers = define_train(
hparams)
if event_dir:
summary_writer = tf.summary.FileWriter(
event_dir, graph=tf.get_default_graph(), flush_secs=60)
else:
summary_writer = None
if model_dir:
model_saver = tf.train.Saver(
tf.global_variables(".*network_parameters.*"))
else:
model_saver = None
with tf.Session() as sess:
sess.run(tf.global_variables_initializer())
for initializer in initializers:
initializer(sess)
start_step = 0
if model_saver and restore_agent:
start_step = trainer_lib.restore_checkpoint(
model_dir, model_saver, sess)
# Fail-friendly, complete only unfinished epoch
steps_to_go = hparams.epochs_num - start_step
if steps_to_go <= 0:
tf.logging.info(
"Skipping PPO training. Requested %d steps while "
"%d train steps already reached", hparams.epochs_num,
start_step)
return
for epoch_index in range(steps_to_go):
summary = sess.run(train_summary_op)
if summary_writer:
summary_writer.add_summary(summary, epoch_index)
if (hparams.eval_every_epochs
and epoch_index % hparams.eval_every_epochs == 0):
eval_summary = sess.run(eval_summary_op)
if summary_writer:
summary_writer.add_summary(eval_summary,
epoch_index)
if report_fn:
summary_proto = tf.Summary()
summary_proto.ParseFromString(eval_summary)
for elem in summary_proto.value:
if "mean_score" in elem.tag:
report_fn(elem.simple_value, epoch_index)
break
epoch_index_and_start = epoch_index + start_step
if (model_saver and hparams.save_models_every_epochs
and (epoch_index_and_start %
hparams.save_models_every_epochs == 0 or
(epoch_index + 1) == steps_to_go)):
ckpt_path = os.path.join(
model_dir, "model.ckpt-{}".format(epoch_index + 1 +
start_step))
model_saver.save(sess, ckpt_path)
def main(_):
hparams = registry.hparams(FLAGS.loop_hparams_set)
hparams.parse(FLAGS.loop_hparams)
output_dir = FLAGS.output_dir
subdirectories = ["data", "tmp", "world_model", "ppo"]
using_autoencoder = hparams.autoencoder_train_steps > 0
if using_autoencoder:
subdirectories.append("autoencoder")
directories = setup_directories(output_dir, subdirectories)
if hparams.game in gym_problems_specs.ATARI_GAMES:
game_with_mode = hparams.game + "_deterministic-v4"
else:
game_with_mode = hparams.game
if using_autoencoder:
simulated_problem_name = (
"gym_simulated_discrete_problem_with_agent_on_%s_autoencoded" %
game_with_mode)
else:
simulated_problem_name = (
"gym_simulated_discrete_problem_with_agent_on_%s" % game_with_mode)
if simulated_problem_name not in registry.list_problems():
tf.logging.info(
"Game Problem %s not found; dynamically registering",
simulated_problem_name)
gym_problems_specs.create_problems_for_game(
hparams.game, game_mode="Deterministic-v4")
epoch = hparams.epochs - 1
epoch_data_dir = os.path.join(directories["data"], str(epoch))
ppo_model_dir = directories["ppo"]
world_model_dir = directories["world_model"]
gym_problem = registry.problem(simulated_problem_name)
model_hparams = trainer_lib.create_hparams(hparams.generative_model_params)
environment_spec = copy.copy(gym_problem.environment_spec)
environment_spec.simulation_random_starts = hparams.simulation_random_starts
batch_env_hparams = trainer_lib.create_hparams(hparams.ppo_params)
batch_env_hparams.add_hparam("model_hparams", model_hparams)
batch_env_hparams.add_hparam("environment_spec", environment_spec)
batch_env_hparams.num_agents = 1
with temporary_flags({
"problem": simulated_problem_name,
"model": hparams.generative_model,
"hparams_set": hparams.generative_model_params,
"output_dir": world_model_dir,
"data_dir": epoch_data_dir,
}):
sess = tf.Session()
env = DebugBatchEnv(batch_env_hparams, sess)
sess.run(tf.global_variables_initializer())
env.initialize()
env_model_loader = tf.train.Saver(tf.global_variables("next_frame*"))
trainer_lib.restore_checkpoint(world_model_dir,
env_model_loader,
sess,
must_restore=True)
model_saver = tf.train.Saver(
tf.global_variables(".*network_parameters.*"))
trainer_lib.restore_checkpoint(ppo_model_dir, model_saver, sess)
key_mapping = gym_problem.env.env.get_keys_to_action()
# map special codes
key_mapping[()] = 100
key_mapping[(ord("r"), )] = 101
key_mapping[(ord("p"), )] = 102
play.play(env, zoom=2, fps=10, keys_to_action=key_mapping)
def train(hparams,
event_dir=None,
model_dir=None,
restore_agent=True,
name_scope="rl_train"):
"""Train."""
with tf.Graph().as_default():
with tf.name_scope(name_scope):
train_summary_op, _, initialization = define_train(hparams)
if event_dir:
summary_writer = tf.summary.FileWriter(
event_dir, graph=tf.get_default_graph(), flush_secs=60)
else:
summary_writer = None
if model_dir:
model_saver = tf.train.Saver(
tf.global_variables(".*network_parameters.*"))
else:
model_saver = None
# TODO(piotrmilos): This should be refactored, possibly with
# handlers for each type of env
if hparams.environment_spec.simulated_env:
env_model_loader = tf.train.Saver(
tf.global_variables("next_frame*"))
else:
env_model_loader = None
with tf.Session() as sess:
sess.run(tf.global_variables_initializer())
initialization(sess)
if env_model_loader:
trainer_lib.restore_checkpoint(hparams.world_model_dir,
env_model_loader,
sess,
must_restore=True)
start_step = 0
if model_saver and restore_agent:
start_step = trainer_lib.restore_checkpoint(
model_dir, model_saver, sess)
# Fail-friendly, complete only unfinished epoch
steps_to_go = hparams.epochs_num - start_step
if steps_to_go <= 0:
tf.logging.info(
"Skipping PPO training. Requested %d steps while "
"%d train steps already reached", hparams.epochs_num,
start_step)
return
for epoch_index in range(steps_to_go):
summary = sess.run(train_summary_op)
if summary_writer:
summary_writer.add_summary(summary, epoch_index)
if (hparams.eval_every_epochs
and epoch_index % hparams.eval_every_epochs == 0):
if summary_writer and summary:
summary_writer.add_summary(summary, epoch_index)
else:
tf.logging.info("Eval summary not saved")
epoch_index_and_start = epoch_index + start_step
if (model_saver and hparams.save_models_every_epochs
and (epoch_index_and_start %
hparams.save_models_every_epochs == 0 or
(epoch_index + 1) == steps_to_go)):
ckpt_path = os.path.join(
model_dir, "model.ckpt-{}".format(epoch_index + 1 +
start_step))
model_saver.save(sess, ckpt_path)
def main(_):
hparams = registry.hparams(FLAGS.loop_hparams_set)
hparams.parse(FLAGS.loop_hparams)
output_dir = FLAGS.output_dir
subdirectories = ["data", "tmp", "world_model", "ppo"]
using_autoencoder = hparams.autoencoder_train_steps > 0
if using_autoencoder:
subdirectories.append("autoencoder")
directories = setup_directories(output_dir, subdirectories)
if hparams.game in gym_env.ATARI_GAMES:
game_with_mode = hparams.game + "_deterministic-v4"
else:
game_with_mode = hparams.game
if using_autoencoder:
simulated_problem_name = (
"gym_simulated_discrete_problem_with_agent_on_%s_autoencoded"
% game_with_mode)
else:
simulated_problem_name = ("gym_simulated_discrete_problem_with_agent_on_%s"
% game_with_mode)
if simulated_problem_name not in registry.list_problems():
tf.logging.info("Game Problem %s not found; dynamically registering",
simulated_problem_name)
gym_env.register_game(hparams.game, game_mode="Deterministic-v4")
epoch = hparams.epochs-1
epoch_data_dir = os.path.join(directories["data"], str(epoch))
ppo_model_dir = directories["ppo"]
world_model_dir = directories["world_model"]
gym_problem = registry.problem(simulated_problem_name)
model_hparams = trainer_lib.create_hparams(hparams.generative_model_params)
environment_spec = copy.copy(gym_problem.environment_spec)
environment_spec.simulation_random_starts = hparams.simulation_random_starts
batch_env_hparams = trainer_lib.create_hparams(hparams.ppo_params)
batch_env_hparams.add_hparam("model_hparams", model_hparams)
batch_env_hparams.add_hparam("environment_spec", environment_spec)
batch_env_hparams.num_agents = 1
with temporary_flags({
"problem": simulated_problem_name,
"model": hparams.generative_model,
"hparams_set": hparams.generative_model_params,
"output_dir": world_model_dir,
"data_dir": epoch_data_dir,
}):
sess = tf.Session()
env = DebugBatchEnv(batch_env_hparams, sess)
sess.run(tf.global_variables_initializer())
env.initialize()
env_model_loader = tf.train.Saver(
tf.global_variables("next_frame*"))
trainer_lib.restore_checkpoint(world_model_dir, env_model_loader, sess,
must_restore=True)
model_saver = tf.train.Saver(
tf.global_variables(".*network_parameters.*"))
trainer_lib.restore_checkpoint(ppo_model_dir, model_saver, sess)
key_mapping = gym_problem.env.env.get_keys_to_action()
# map special codes
key_mapping[()] = 100
key_mapping[(ord("r"),)] = 101
key_mapping[(ord("p"),)] = 102
play.play(env, zoom=2, fps=10, keys_to_action=key_mapping)
