def get_agent_by_name(agent_name, time_step_spec, action_spec):
if agent_name == 'LinUCB':
return lin_ucb_agent.LinearUCBAgent(time_step_spec=time_step_spec,
action_spec=action_spec,
dtype=tf.float32)
elif agent_name == 'LinTS':
return lin_ts_agent.LinearThompsonSamplingAgent(
time_step_spec=time_step_spec,
action_spec=action_spec,
dtype=tf.float32)
elif agent_name == 'epsGreedy':
network = q_network.QNetwork(
input_tensor_spec=time_step_spec.observation,
action_spec=action_spec,
fc_layer_params=(50, 50, 50))
return neural_epsilon_greedy_agent.NeuralEpsilonGreedyAgent(
time_step_spec=time_step_spec,
action_spec=action_spec,
reward_network=network,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=0.05),
epsilon=0.1)
elif agent_name == 'mix':
emit_policy_info = (
policy_utilities.InfoFields.PREDICTED_REWARDS_MEAN, )
network = q_network.QNetwork(
input_tensor_spec=time_step_spec.observation,
action_spec=action_spec,
fc_layer_params=(50, 50, 50))
agent_epsgreedy = neural_epsilon_greedy_agent.NeuralEpsilonGreedyAgent(
time_step_spec=time_step_spec,
action_spec=action_spec,
reward_network=network,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=0.05),
emit_policy_info=emit_policy_info,
epsilon=0.1)
agent_linucb = lin_ucb_agent.LinearUCBAgent(
time_step_spec=time_step_spec,
action_spec=action_spec,
emit_policy_info=emit_policy_info,
dtype=tf.float32)
agent_random = neural_epsilon_greedy_agent.NeuralEpsilonGreedyAgent(
time_step_spec=time_step_spec,
action_spec=action_spec,
reward_network=network,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=0.05),
emit_policy_info=emit_policy_info,
epsilon=1.)
agent_halfrandom = neural_epsilon_greedy_agent.NeuralEpsilonGreedyAgent(
time_step_spec=time_step_spec,
action_spec=action_spec,
reward_network=network,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=0.05),
emit_policy_info=emit_policy_info,
epsilon=0.5)
return exp3_mixture_agent.Exp3MixtureAgent(
(agent_epsgreedy, agent_linucb, agent_random, agent_halfrandom))
def testTrainPerArmAgent(self):
obs_spec = bandit_spec_utils.create_per_arm_observation_spec(2, 3, 3)
time_step_spec = ts.time_step_spec(obs_spec)
reward_net = (global_and_arm_feature_network.
create_feed_forward_common_tower_network(
obs_spec, (4, 3), (3, 4), (4, 2)))
optimizer = tf.compat.v1.train.GradientDescentOptimizer(
learning_rate=0.1)
agent = neural_epsilon_greedy_agent.NeuralEpsilonGreedyAgent(
time_step_spec,
self._action_spec,
reward_network=reward_net,
optimizer=optimizer,
epsilon=0.1,
accepts_per_arm_features=True)
observations = {
bandit_spec_utils.GLOBAL_FEATURE_KEY:
tf.constant([[1, 2], [3, 4]], dtype=tf.float32),
bandit_spec_utils.PER_ARM_FEATURE_KEY:
tf.cast(tf.reshape(tf.range(18), shape=[2, 3, 3]),
dtype=tf.float32)
}
time_steps = ts.restart(observations, batch_size=2)
policy = agent.policy
action_step = policy.action(time_steps)
self.evaluate(tf.compat.v1.initialize_all_variables())
actions = self.evaluate(action_step.action)
self.assertAllEqual(actions.shape, (2, ))
def main(unused_argv):
tf.compat.v1.enable_v2_behavior() # The trainer only runs with V2 enabled.
data_path = FLAGS.data_path
if not data_path:
raise ValueError('Please specify the location of the data file.')
env = movielens_py_environment.MovieLensPyEnvironment(
data_path, RANK_K, BATCH_SIZE, num_movies=20)
environment = tf_py_environment.TFPyEnvironment(env)
optimal_reward_fn = functools.partial(
environment_utilities.compute_optimal_reward_with_movielens_environment,
environment=environment)
optimal_action_fn = functools.partial(
environment_utilities.compute_optimal_action_with_movielens_environment,
environment=environment)
if FLAGS.agent == 'LinUCB':
agent = lin_ucb_agent.LinearUCBAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
tikhonov_weight=0.001,
alpha=AGENT_ALPHA,
dtype=tf.float32)
elif FLAGS.agent == 'LinTS':
agent = lin_ts_agent.LinearThompsonSamplingAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
dtype=tf.float32)
elif FLAGS.agent == 'epsGreedy':
network = q_network.QNetwork(
input_tensor_spec=environment.time_step_spec().observation,
action_spec=environment.action_spec(),
fc_layer_params=LAYERS)
agent = eps_greedy_agent.NeuralEpsilonGreedyAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
reward_network=network,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=LR),
epsilon=EPSILON)
elif FLAGS.agent == 'DropoutTS':
agent = dropout_ts_agent.DropoutThompsonSamplingAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
dropout_rate=DROPOUT_RATE,
network_layers=LAYERS,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=LR))
regret_metric = tf_bandit_metrics.RegretMetric(optimal_reward_fn)
suboptimal_arms_metric = tf_bandit_metrics.SuboptimalArmsMetric(
optimal_action_fn)
trainer.train(
root_dir=FLAGS.root_dir,
agent=agent,
environment=environment,
training_loops=TRAINING_LOOPS,
steps_per_loop=STEPS_PER_LOOP,
additional_metrics=[regret_metric, suboptimal_arms_metric])
def testAgentWithDifferentSubagentsUpdate(self):
num_actions = 3
context_dim = 2
batch_size = 7
observation_spec = tensor_spec.TensorSpec([context_dim], tf.float32)
time_step_spec = time_step.time_step_spec(observation_spec)
action_spec = tensor_spec.BoundedTensorSpec(
dtype=tf.int32, shape=(), minimum=0, maximum=num_actions - 1)
agent1 = lin_ucb_agent.LinearUCBAgent(
time_step_spec,
action_spec,
emit_policy_info=(policy_utilities.InfoFields.PREDICTED_REWARDS_MEAN,))
reward_net = q_network.QNetwork(
input_tensor_spec=observation_spec,
action_spec=action_spec,
fc_layer_params=(4, 3, 2))
agent2 = neural_epsilon_greedy_agent.NeuralEpsilonGreedyAgent(
time_step_spec,
action_spec,
reward_network=reward_net,
emit_policy_info=(policy_utilities.InfoFields.PREDICTED_REWARDS_MEAN,),
optimizer=tf.compat.v1.train.GradientDescentOptimizer(
learning_rate=0.1),
epsilon=0.1)
agents = [agent1, agent2]
dist = tfd.Categorical(probs=tf.Variable([0., 1.]))
mixed_agent = WeightRotatingMixtureAgent(dist, agents)
initial_step, final_step = _get_initial_and_final_steps(
batch_size, context_dim)
action = np.random.randint(num_actions, size=batch_size, dtype=np.int32)
action_step = _get_action_step(action, 2, num_actions)
experience = _get_experience(initial_step, action_step, final_step)
self.evaluate(mixed_agent.initialize())
loss_info = mixed_agent.train(experience)
self.evaluate(loss_info)
def main(unused_argv):
tf.compat.v1.enable_v2_behavior() # The trainer only runs with V2 enabled.
class LinearNormalReward(object):
def __init__(self, theta):
self.theta = theta
def __call__(self, x):
mu = np.dot(x, self.theta)
return np.random.normal(mu, 1)
def _global_context_sampling_fn():
return np.random.randint(-10, 10, [4]).astype(np.float32)
def _arm_context_sampling_fn():
return np.random.randint(-2, 3, [5]).astype(np.float32)
reward_fn = LinearNormalReward(HIDDEN_PARAM)
env = sspe.StationaryStochasticPerArmPyEnvironment(
_global_context_sampling_fn,
_arm_context_sampling_fn,
NUM_ACTIONS,
reward_fn,
batch_size=BATCH_SIZE)
environment = tf_py_environment.TFPyEnvironment(env)
obs_spec = environment.observation_spec()
if FLAGS.network == 'commontower':
network = (global_and_arm_feature_network.
create_feed_forward_common_tower_network(
obs_spec, (4, 3), (3, 4), (4, 2)))
elif FLAGS.network == 'dotproduct':
network = (global_and_arm_feature_network.
create_feed_forward_dot_product_network(
obs_spec, (4, 3, 6), (3, 4, 6)))
agent = neural_epsilon_greedy_agent.NeuralEpsilonGreedyAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
reward_network=network,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=LR),
epsilon=EPSILON,
accepts_per_arm_features=True,
emit_policy_info=policy_utilities.InfoFields.PREDICTED_REWARDS_MEAN)
optimal_reward_fn = functools.partial(optimal_reward,
hidden_param=HIDDEN_PARAM)
optimal_action_fn = functools.partial(optimal_action,
hidden_param=HIDDEN_PARAM)
regret_metric = tf_bandit_metrics.RegretMetric(optimal_reward_fn)
suboptimal_arms_metric = tf_bandit_metrics.SuboptimalArmsMetric(
optimal_action_fn)
trainer.train(root_dir=FLAGS.root_dir,
agent=agent,
environment=environment,
training_loops=TRAINING_LOOPS,
steps_per_loop=STEPS_PER_LOOP,
additional_metrics=[regret_metric, suboptimal_arms_metric])
def main(unused_argv):
tf.compat.v1.enable_v2_behavior() # The trainer only runs with V2 enabled.
with tf.device('/CPU:0'): # due to b/128333994
covertype_dataset = dataset_utilities.convert_covertype_dataset(
FLAGS.covertype_csv)
covertype_reward_distribution = tfd.Independent(
tfd.Deterministic(tf.eye(7)), reinterpreted_batch_ndims=2)
environment = ce.ClassificationBanditEnvironment(
covertype_dataset, covertype_reward_distribution, BATCH_SIZE)
optimal_reward_fn = functools.partial(
env_util.compute_optimal_reward_with_classification_environment,
environment=environment)
optimal_action_fn = functools.partial(
env_util.compute_optimal_action_with_classification_environment,
environment=environment)
if FLAGS.agent == 'LinUCB':
agent = lin_ucb_agent.LinearUCBAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
alpha=AGENT_ALPHA,
emit_log_probability=False,
dtype=tf.float32)
elif FLAGS.agent == 'LinTS':
agent = lin_ts_agent.LinearThompsonSamplingAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
alpha=AGENT_ALPHA,
dtype=tf.float32)
elif FLAGS.agent == 'epsGreedy':
network = q_network.QNetwork(
input_tensor_spec=environment.time_step_spec().observation,
action_spec=environment.action_spec(),
fc_layer_params=LAYERS)
agent = eps_greedy_agent.NeuralEpsilonGreedyAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
reward_network=network,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=LR),
epsilon=EPSILON)
regret_metric = tf_bandit_metrics.RegretMetric(optimal_reward_fn)
suboptimal_arms_metric = tf_bandit_metrics.SuboptimalArmsMetric(
optimal_action_fn)
trainer.train(
root_dir=FLAGS.root_dir,
agent=agent,
environment=environment,
training_loops=TRAINING_LOOPS,
steps_per_loop=STEPS_PER_LOOP,
additional_metrics=[regret_metric, suboptimal_arms_metric])
def main(unused_argv):
tf.enable_resource_variables()
with tf.device('/CPU:0'): # due to b/128333994
env = wheel_py_environment.WheelPyEnvironment(DELTA, MU_BASE, STD_BASE,
MU_HIGH, STD_HIGH,
BATCH_SIZE)
environment = tf_py_environment.TFPyEnvironment(env)
optimal_reward_fn = functools.partial(
environment_utilities.tf_wheel_bandit_compute_optimal_reward,
delta=DELTA,
mu_inside=MU_BASE[0],
mu_high=MU_HIGH)
optimal_action_fn = functools.partial(
environment_utilities.tf_wheel_bandit_compute_optimal_action,
delta=DELTA)
if FLAGS.agent == 'LinUCB':
agent = lin_ucb_agent.LinearUCBAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
alpha=AGENT_ALPHA,
dtype=tf.float32)
elif FLAGS.agent == 'LinTS':
agent = lin_ts_agent.LinearThompsonSamplingAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
alpha=AGENT_ALPHA,
dtype=tf.float32)
elif FLAGS.agent == 'epsGreedy':
network = q_network.QNetwork(
input_tensor_spec=environment.time_step_spec().observation,
action_spec=environment.action_spec(),
fc_layer_params=LAYERS)
agent = eps_greedy_agent.NeuralEpsilonGreedyAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
reward_network=network,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=LR),
epsilon=EPSILON)
regret_metric = tf_bandit_metrics.RegretMetric(optimal_reward_fn)
suboptimal_arms_metric = tf_bandit_metrics.SuboptimalArmsMetric(
optimal_action_fn)
trainer.train(
root_dir=FLAGS.root_dir,
agent=agent,
environment=environment,
training_loops=TRAINING_LOOPS,
steps_per_loop=STEPS_PER_LOOP,
additional_metrics=[regret_metric, suboptimal_arms_metric])
def testPolicyWithEpsilonGreedy(self):
reward_net = DummyNet(self._observation_spec, self._action_spec)
agent = neural_epsilon_greedy_agent.NeuralEpsilonGreedyAgent(
self._time_step_spec,
self._action_spec,
reward_network=reward_net,
optimizer=None,
epsilon=0.1)
observations = tf.constant([[1, 2], [3, 4]], dtype=tf.float32)
time_steps = ts.restart(observations, batch_size=2)
policy = agent.policy
action_step = policy.action(time_steps)
# Batch size 2.
self.assertAllEqual([2], action_step.action.shape)
self.evaluate(tf.compat.v1.global_variables_initializer())
actions = self.evaluate(action_step.action)
self.assertIn(actions[0], [0, 1, 2])
self.assertIn(actions[1], [0, 1, 2])
def testPolicyWithEpsilonGreedyAndActionMask(self):
reward_net = DummyNet(self._observation_spec, self._action_spec)
obs_spec = (tensor_spec.TensorSpec([2], tf.float32),
tensor_spec.TensorSpec([3], tf.int32))
agent = neural_epsilon_greedy_agent.NeuralEpsilonGreedyAgent(
ts.time_step_spec(obs_spec),
self._action_spec,
reward_network=reward_net,
optimizer=None,
observation_and_action_constraint_splitter=lambda x: (x[0], x[1]),
epsilon=0.1)
observations = (tf.constant([[1, 2], [3, 4]], dtype=tf.float32),
tf.constant([[0, 0, 1], [0, 1, 0]], dtype=tf.int32))
time_steps = ts.restart(observations, batch_size=2)
policy = agent.policy
action_step = policy.action(time_steps)
# Batch size 2.
self.assertAllEqual([2], action_step.action.shape)
self.evaluate(tf.compat.v1.global_variables_initializer())
actions = self.evaluate(action_step.action)
self.assertAllEqual(actions, [2, 1])
def main(unused_argv):
tf.compat.v1.enable_v2_behavior() # The trainer only runs with V2 enabled.
class LinearNormalReward(object):
def __init__(self, theta):
self.theta = theta
def __call__(self, x):
mu = np.dot(x, self.theta)
return np.random.normal(mu, 1)
def _global_context_sampling_fn():
return np.random.randint(-10, 10, [4]).astype(np.float32)
def _arm_context_sampling_fn():
return np.random.randint(-2, 3, [5]).astype(np.float32)
reward_fn = LinearNormalReward(HIDDEN_PARAM)
observation_and_action_constraint_splitter = None
num_actions_fn = None
variable_action_method = bandit_spec_utils.VariableActionMethod.FIXED
if FLAGS.add_num_actions_feature:
num_actions_fn = lambda: NUM_ACTIONS
variable_action_method = (
bandit_spec_utils.VariableActionMethod.NUM_ACTIONS_FEATURE)
env = sspe.StationaryStochasticPerArmPyEnvironment(
_global_context_sampling_fn,
_arm_context_sampling_fn,
NUM_ACTIONS,
reward_fn,
num_actions_fn,
batch_size=BATCH_SIZE,
variable_action_method=variable_action_method)
environment = tf_py_environment.TFPyEnvironment(env)
if FLAGS.agent == 'LinUCB':
agent = lin_ucb_agent.LinearUCBAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
alpha=AGENT_ALPHA,
accepts_per_arm_features=True,
dtype=tf.float32)
elif FLAGS.agent == 'LinTS':
agent = lin_ts_agent.LinearThompsonSamplingAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
alpha=AGENT_ALPHA,
observation_and_action_constraint_splitter=(
observation_and_action_constraint_splitter),
accepts_per_arm_features=True,
dtype=tf.float32)
elif FLAGS.agent == 'epsGreedy':
obs_spec = environment.observation_spec()
if FLAGS.network == 'commontower':
network = (global_and_arm_feature_network.
create_feed_forward_common_tower_network(
obs_spec, (40, 30), (30, 40), (40, 20)))
elif FLAGS.network == 'dotproduct':
network = (global_and_arm_feature_network.
create_feed_forward_dot_product_network(
obs_spec, (4, 3, 6), (3, 4, 6)))
agent = neural_epsilon_greedy_agent.NeuralEpsilonGreedyAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
reward_network=network,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=LR),
epsilon=EPSILON,
observation_and_action_constraint_splitter=(
observation_and_action_constraint_splitter),
accepts_per_arm_features=True,
emit_policy_info=policy_utilities.InfoFields.PREDICTED_REWARDS_MEAN
)
elif FLAGS.agent == 'NeuralLinUCB':
obs_spec = environment.observation_spec()
network = (global_and_arm_feature_network.
create_feed_forward_common_tower_network(
obs_spec, (40, 30), (30, 40), (40, 20), ENCODING_DIM))
agent = neural_linucb_agent.NeuralLinUCBAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
encoding_network=network,
encoding_network_num_train_steps=EPS_PHASE_STEPS,
encoding_dim=ENCODING_DIM,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=LR),
alpha=1.0,
gamma=1.0,
epsilon_greedy=EPSILON,
accepts_per_arm_features=True,
debug_summaries=True,
summarize_grads_and_vars=True,
emit_policy_info=policy_utilities.InfoFields.PREDICTED_REWARDS_MEAN
)
def _all_rewards(observation, hidden_param):
"""Outputs rewards for all actions, given an observation."""
hidden_param = tf.cast(hidden_param, dtype=tf.float32)
global_obs = observation[bandit_spec_utils.GLOBAL_FEATURE_KEY]
per_arm_obs = observation[bandit_spec_utils.PER_ARM_FEATURE_KEY]
num_actions = tf.shape(per_arm_obs)[1]
tiled_global = tf.tile(tf.expand_dims(global_obs, axis=1),
[1, num_actions, 1])
concatenated = tf.concat([tiled_global, per_arm_obs], axis=-1)
rewards = tf.linalg.matvec(concatenated, hidden_param)
return rewards
def optimal_reward(observation, hidden_param):
return tf.reduce_max(_all_rewards(observation, hidden_param), axis=1)
def optimal_action(observation, hidden_param):
return tf.argmax(_all_rewards(observation, hidden_param),
axis=1,
output_type=tf.int32)
optimal_reward_fn = functools.partial(optimal_reward,
hidden_param=HIDDEN_PARAM)
optimal_action_fn = functools.partial(optimal_action,
hidden_param=HIDDEN_PARAM)
regret_metric = tf_bandit_metrics.RegretMetric(optimal_reward_fn)
suboptimal_arms_metric = tf_bandit_metrics.SuboptimalArmsMetric(
optimal_action_fn)
if FLAGS.drop_arm_obs:
drop_arm_feature_fn = functools.partial(
bandit_spec_utils.drop_arm_observation)
else:
drop_arm_feature_fn = None
trainer.train(root_dir=FLAGS.root_dir,
agent=agent,
environment=environment,
training_loops=TRAINING_LOOPS,
steps_per_loop=STEPS_PER_LOOP,
additional_metrics=[regret_metric, suboptimal_arms_metric],
training_data_spec_transformation_fn=drop_arm_feature_fn)
def get_agent_by_name(agent_name, time_step_spec, action_spec):
"""Helper function that outputs an agent.
Args:
agent_name: The name (string) of the desired agent.
time_step_spec: The time step spec of the environment on which the agent
acts.
action_spec: The action spec on which the agent acts.
Returns:
The desired agent.
"""
accepts_per_arm_features = isinstance(
time_step_spec.observation,
dict) and 'per_arm' in time_step_spec.observation
if agent_name == 'LinUCB':
return lin_ucb_agent.LinearUCBAgent(
time_step_spec=time_step_spec,
action_spec=action_spec,
dtype=tf.float32,
accepts_per_arm_features=accepts_per_arm_features)
elif agent_name == 'LinTS':
return lin_ts_agent.LinearThompsonSamplingAgent(
time_step_spec=time_step_spec,
action_spec=action_spec,
dtype=tf.float32,
accepts_per_arm_features=accepts_per_arm_features)
elif agent_name == 'epsGreedy':
if accepts_per_arm_features:
network = (global_and_arm_feature_network.
create_feed_forward_common_tower_network(
time_step_spec.observation, (20, 20), (20, 20),
(20, 20)))
else:
network = q_network.QNetwork(
input_tensor_spec=time_step_spec.observation,
action_spec=action_spec,
fc_layer_params=(50, 50, 50))
return neural_epsilon_greedy_agent.NeuralEpsilonGreedyAgent(
time_step_spec=time_step_spec,
action_spec=action_spec,
reward_network=network,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=0.05),
epsilon=0.1,
accepts_per_arm_features=accepts_per_arm_features)
elif agent_name == 'mix':
assert not accepts_per_arm_features, 'Per-arm mixture agent not supported.'
emit_policy_info = (
policy_utilities.InfoFields.PREDICTED_REWARDS_MEAN, )
network = q_network.QNetwork(
input_tensor_spec=time_step_spec.observation,
action_spec=action_spec,
fc_layer_params=(50, 50, 50))
agent_epsgreedy = neural_epsilon_greedy_agent.NeuralEpsilonGreedyAgent(
time_step_spec=time_step_spec,
action_spec=action_spec,
reward_network=network,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=0.05),
emit_policy_info=emit_policy_info,
epsilon=0.1)
agent_linucb = lin_ucb_agent.LinearUCBAgent(
time_step_spec=time_step_spec,
action_spec=action_spec,
emit_policy_info=emit_policy_info,
dtype=tf.float32)
agent_random = neural_epsilon_greedy_agent.NeuralEpsilonGreedyAgent(
time_step_spec=time_step_spec,
action_spec=action_spec,
reward_network=network,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=0.05),
emit_policy_info=emit_policy_info,
epsilon=1.)
agent_halfrandom = neural_epsilon_greedy_agent.NeuralEpsilonGreedyAgent(
time_step_spec=time_step_spec,
action_spec=action_spec,
reward_network=network,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=0.05),
emit_policy_info=emit_policy_info,
epsilon=0.5)
return exp3_mixture_agent.Exp3MixtureAgent(
(agent_epsgreedy, agent_linucb, agent_random, agent_halfrandom))
def main(unused_argv):
tf.compat.v1.enable_v2_behavior() # The trainer only runs with V2 enabled.
data_path = FLAGS.data_path
if not data_path:
raise ValueError('Please specify the location of the data file.')
if FLAGS.per_arm:
env = movielens_per_arm_py_environment.MovieLensPerArmPyEnvironment(
data_path,
RANK_K,
BATCH_SIZE,
num_actions=NUM_ACTIONS,
csv_delimiter='\t')
else:
env = movielens_py_environment.MovieLensPyEnvironment(
data_path,
RANK_K,
BATCH_SIZE,
num_movies=NUM_ACTIONS,
csv_delimiter='\t')
environment = tf_py_environment.TFPyEnvironment(env)
optimal_reward_fn = functools.partial(
environment_utilities.compute_optimal_reward_with_movielens_environment,
environment=environment)
optimal_action_fn = functools.partial(
environment_utilities.compute_optimal_action_with_movielens_environment,
environment=environment)
if FLAGS.agent == 'LinUCB':
agent = lin_ucb_agent.LinearUCBAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
tikhonov_weight=0.001,
alpha=AGENT_ALPHA,
dtype=tf.float32,
accepts_per_arm_features=FLAGS.per_arm)
elif FLAGS.agent == 'LinTS':
agent = lin_ts_agent.LinearThompsonSamplingAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
dtype=tf.float32,
accepts_per_arm_features=FLAGS.per_arm)
elif FLAGS.agent == 'epsGreedy':
if FLAGS.per_arm:
network = (
global_and_arm_feature_network
.create_feed_forward_dot_product_network(
environment.time_step_spec().observation,
global_layers=LAYERS,
arm_layers=LAYERS))
else:
network = q_network.QNetwork(
input_tensor_spec=environment.time_step_spec().observation,
action_spec=environment.action_spec(),
fc_layer_params=LAYERS)
agent = eps_greedy_agent.NeuralEpsilonGreedyAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
reward_network=network,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=LR),
epsilon=EPSILON,
emit_policy_info='predicted_rewards_mean',
info_fields_to_inherit_from_greedy=['predicted_rewards_mean'])
elif FLAGS.agent == 'DropoutTS':
train_step_counter = tf.compat.v1.train.get_or_create_global_step()
def dropout_fn():
return tf.math.maximum(
tf.math.reciprocal_no_nan(1.01 +
tf.cast(train_step_counter, tf.float32)),
0.0003)
agent = dropout_ts_agent.DropoutThompsonSamplingAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
dropout_rate=dropout_fn,
network_layers=LAYERS,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=LR))
regret_metric = tf_bandit_metrics.RegretMetric(optimal_reward_fn)
suboptimal_arms_metric = tf_bandit_metrics.SuboptimalArmsMetric(
optimal_action_fn)
trainer.train(
root_dir=FLAGS.root_dir,
agent=agent,
environment=environment,
training_loops=TRAINING_LOOPS,
steps_per_loop=STEPS_PER_LOOP,
additional_metrics=[regret_metric, suboptimal_arms_metric])
def main(unused_argv):
tf.compat.v1.enable_v2_behavior() # The trainer only runs with V2 enabled.
with tf.device('/CPU:0'): # due to b/128333994
if FLAGS.normalize_reward_fns:
action_reward_fns = (environment_utilities.
normalized_sliding_linear_reward_fn_generator(
CONTEXT_DIM, NUM_ACTIONS,
REWARD_NOISE_VARIANCE))
else:
action_reward_fns = (
environment_utilities.sliding_linear_reward_fn_generator(
CONTEXT_DIM, NUM_ACTIONS, REWARD_NOISE_VARIANCE))
env = sspe.StationaryStochasticPyEnvironment(functools.partial(
environment_utilities.context_sampling_fn,
batch_size=BATCH_SIZE,
context_dim=CONTEXT_DIM),
action_reward_fns,
batch_size=BATCH_SIZE)
mask_split_fn = None
if FLAGS.num_disabled_actions > 0:
mask_split_fn = lambda x: (x[0], x[1])
env = wrappers.ExtraDisabledActionsWrapper(
env, FLAGS.num_disabled_actions)
environment = tf_py_environment.TFPyEnvironment(env)
optimal_reward_fn = functools.partial(
environment_utilities.tf_compute_optimal_reward,
per_action_reward_fns=action_reward_fns)
optimal_action_fn = functools.partial(
environment_utilities.tf_compute_optimal_action,
per_action_reward_fns=action_reward_fns)
network_input_spec = environment.time_step_spec().observation
if FLAGS.num_disabled_actions > 0:
def _apply_only_to_observation(fn):
def result_fn(obs):
return fn(obs[0])
return result_fn
optimal_action_fn = _apply_only_to_observation(optimal_action_fn)
optimal_reward_fn = _apply_only_to_observation(optimal_reward_fn)
network_input_spec = network_input_spec[0]
network = q_network.QNetwork(input_tensor_spec=network_input_spec,
action_spec=environment.action_spec(),
fc_layer_params=LAYERS)
if FLAGS.agent == 'LinUCB':
agent = lin_ucb_agent.LinearUCBAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
alpha=AGENT_ALPHA,
dtype=tf.float32,
observation_and_action_constraint_splitter=mask_split_fn)
elif FLAGS.agent == 'LinTS':
agent = lin_ts_agent.LinearThompsonSamplingAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
alpha=AGENT_ALPHA,
dtype=tf.float32,
observation_and_action_constraint_splitter=mask_split_fn)
elif FLAGS.agent == 'epsGreedy':
agent = neural_epsilon_greedy_agent.NeuralEpsilonGreedyAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
reward_network=network,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=LR),
epsilon=EPSILON,
observation_and_action_constraint_splitter=mask_split_fn)
elif FLAGS.agent == 'Boltzmann':
train_step_counter = tf.compat.v1.train.get_or_create_global_step()
boundaries = [500]
temp_values = [1000.0, TEMPERATURE]
temp_schedule = tf.keras.optimizers.schedules.PiecewiseConstantDecay(
boundaries, temp_values)
def _temperature_fn():
# Any variable used in the function needs to be saved in the policy.
# This is true by default for the `train_step_counter`.
return temp_schedule(train_step_counter)
agent = neural_boltzmann_agent.NeuralBoltzmannAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
reward_network=network,
temperature=_temperature_fn,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=LR),
observation_and_action_constraint_splitter=mask_split_fn,
train_step_counter=train_step_counter)
# This is needed, otherwise the PolicySaver complains.
agent.policy.step = train_step_counter
elif FLAGS.agent == 'BoltzmannGumbel':
num_samples_list = [
tf.compat.v2.Variable(0,
dtype=tf.int32,
name='num_samples_{}'.format(k))
for k in range(NUM_ACTIONS)
]
agent = neural_boltzmann_agent.NeuralBoltzmannAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
reward_network=network,
boltzmann_gumbel_exploration_constant=250.0,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=LR),
observation_and_action_constraint_splitter=mask_split_fn,
num_samples_list=num_samples_list)
elif FLAGS.agent == 'Mix':
assert FLAGS.num_disabled_actions == 0, (
'Extra actions with mixture agent not supported.')
emit_policy_info = policy_utilities.InfoFields.PREDICTED_REWARDS_MEAN
agent_linucb = lin_ucb_agent.LinearUCBAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
emit_policy_info=emit_policy_info,
alpha=AGENT_ALPHA,
dtype=tf.float32)
agent_lints = lin_ts_agent.LinearThompsonSamplingAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
emit_policy_info=emit_policy_info,
alpha=AGENT_ALPHA,
dtype=tf.float32)
agent_epsgreedy = neural_epsilon_greedy_agent.NeuralEpsilonGreedyAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
reward_network=network,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=LR),
emit_policy_info=emit_policy_info,
epsilon=EPSILON)
agent = exp3_mixture_agent.Exp3MixtureAgent(
(agent_linucb, agent_lints, agent_epsgreedy))
regret_metric = tf_bandit_metrics.RegretMetric(optimal_reward_fn)
suboptimal_arms_metric = tf_bandit_metrics.SuboptimalArmsMetric(
optimal_action_fn)
trainer.train(
root_dir=FLAGS.root_dir,
agent=agent,
environment=environment,
training_loops=TRAINING_LOOPS,
steps_per_loop=STEPS_PER_LOOP,
additional_metrics=[regret_metric, suboptimal_arms_metric])
def main(unused_argv):
tf.compat.v1.enable_v2_behavior() # The trainer only runs with V2 enabled.
with tf.device('/CPU:0'): # due to b/128333994
action_reward_fns = (
environment_utilities.structured_linear_reward_fn_generator(
CONTEXT_DIM, NUM_ACTIONS, REWARD_NOISE_VARIANCE))
env = sspe.StationaryStochasticPyEnvironment(functools.partial(
environment_utilities.context_sampling_fn,
batch_size=BATCH_SIZE,
context_dim=CONTEXT_DIM),
action_reward_fns,
batch_size=BATCH_SIZE)
environment = tf_py_environment.TFPyEnvironment(env)
optimal_reward_fn = functools.partial(
environment_utilities.tf_compute_optimal_reward,
per_action_reward_fns=action_reward_fns)
optimal_action_fn = functools.partial(
environment_utilities.tf_compute_optimal_action,
per_action_reward_fns=action_reward_fns)
if FLAGS.agent == 'LinUCB':
agent = lin_ucb_agent.LinearUCBAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
alpha=AGENT_ALPHA,
dtype=tf.float32)
elif FLAGS.agent == 'epsGreedy':
laplacian_matrix = utils.build_laplacian_over_ordinal_integer_actions(
environment.action_spec())
network = q_network.QNetwork(
input_tensor_spec=environment.time_step_spec().observation,
action_spec=environment.action_spec(),
fc_layer_params=REWARD_NETWORK_LAYER_PARAMS)
agent = eps_greedy_agent.NeuralEpsilonGreedyAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
reward_network=network,
optimizer=tf.compat.v1.train.AdamOptimizer(
learning_rate=NN_LEARNING_RATE),
epsilon=EPSILON,
laplacian_matrix=laplacian_matrix,
laplacian_smoothing_weight=0.01)
elif FLAGS.agent == 'LinTS':
agent = lin_ts_agent.LinearThompsonSamplingAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
alpha=AGENT_ALPHA,
dtype=tf.float32)
regret_metric = tf_bandit_metrics.RegretMetric(optimal_reward_fn)
suboptimal_arms_metric = tf_bandit_metrics.SuboptimalArmsMetric(
optimal_action_fn)
trainer.train(
root_dir=FLAGS.root_dir,
agent=agent,
environment=environment,
training_loops=TRAINING_LOOPS,
steps_per_loop=STEPS_PER_LOOP,
additional_metrics=[regret_metric, suboptimal_arms_metric])
def main(unused_argv):
tf.compat.v1.enable_v2_behavior() # The trainer only runs with V2 enabled.
with tf.device('/CPU:0'): # due to b/128333994
if FLAGS.normalize_reward_fns:
action_reward_fns = (
environment_utilities.normalized_sliding_linear_reward_fn_generator(
CONTEXT_DIM, NUM_ACTIONS, REWARD_NOISE_VARIANCE))
else:
action_reward_fns = (
environment_utilities.sliding_linear_reward_fn_generator(
CONTEXT_DIM, NUM_ACTIONS, REWARD_NOISE_VARIANCE))
env = sspe.StationaryStochasticPyEnvironment(
functools.partial(
environment_utilities.context_sampling_fn,
batch_size=BATCH_SIZE,
context_dim=CONTEXT_DIM),
action_reward_fns,
batch_size=BATCH_SIZE)
mask_split_fn = None
if FLAGS.num_disabled_actions > 0:
mask_split_fn = lambda x: (x[0], x[1])
env = wrappers.ExtraDisabledActionsWrapper(env,
FLAGS.num_disabled_actions)
environment = tf_py_environment.TFPyEnvironment(env)
optimal_reward_fn = functools.partial(
environment_utilities.tf_compute_optimal_reward,
per_action_reward_fns=action_reward_fns)
optimal_action_fn = functools.partial(
environment_utilities.tf_compute_optimal_action,
per_action_reward_fns=action_reward_fns)
network_input_spec = environment.time_step_spec().observation
if FLAGS.num_disabled_actions > 0:
def _apply_only_to_observation(fn):
def result_fn(obs):
return fn(obs[0])
return result_fn
optimal_action_fn = _apply_only_to_observation(optimal_action_fn)
optimal_reward_fn = _apply_only_to_observation(optimal_reward_fn)
network_input_spec = network_input_spec[0]
network = q_network.QNetwork(
input_tensor_spec=network_input_spec,
action_spec=environment.action_spec(),
fc_layer_params=LAYERS)
if FLAGS.agent == 'LinUCB':
agent = lin_ucb_agent.LinearUCBAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
alpha=AGENT_ALPHA,
dtype=tf.float32,
observation_and_action_constraint_splitter=mask_split_fn)
elif FLAGS.agent == 'LinTS':
agent = lin_ts_agent.LinearThompsonSamplingAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
alpha=AGENT_ALPHA,
dtype=tf.float32,
observation_and_action_constraint_splitter=mask_split_fn)
elif FLAGS.agent == 'epsGreedy':
agent = neural_epsilon_greedy_agent.NeuralEpsilonGreedyAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
reward_network=network,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=LR),
epsilon=EPSILON,
observation_and_action_constraint_splitter=mask_split_fn)
elif FLAGS.agent == 'Mix':
assert FLAGS.num_disabled_actions == 0, (
'Extra actions with mixture agent not supported.')
emit_policy_info = policy_utilities.InfoFields.PREDICTED_REWARDS_MEAN
agent_linucb = lin_ucb_agent.LinearUCBAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
emit_policy_info=emit_policy_info,
alpha=AGENT_ALPHA,
dtype=tf.float32)
agent_lints = lin_ts_agent.LinearThompsonSamplingAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
emit_policy_info=emit_policy_info,
alpha=AGENT_ALPHA,
dtype=tf.float32)
agent_epsgreedy = neural_epsilon_greedy_agent.NeuralEpsilonGreedyAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
reward_network=network,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=LR),
emit_policy_info=emit_policy_info,
epsilon=EPSILON)
agent = exp3_mixture_agent.Exp3MixtureAgent(
(agent_linucb, agent_lints, agent_epsgreedy))
regret_metric = tf_bandit_metrics.RegretMetric(optimal_reward_fn)
suboptimal_arms_metric = tf_bandit_metrics.SuboptimalArmsMetric(
optimal_action_fn)
trainer.train(
root_dir=FLAGS.root_dir,
agent=agent,
environment=environment,
training_loops=TRAINING_LOOPS,
steps_per_loop=STEPS_PER_LOOP,
additional_metrics=[regret_metric, suboptimal_arms_metric])
def main(unused_argv):
tf.compat.v1.enable_v2_behavior() # The trainer only runs with V2 enabled.
with tf.device('/CPU:0'): # due to b/128333994
env = wheel_py_environment.WheelPyEnvironment(DELTA, MU_BASE, STD_BASE,
MU_HIGH, STD_HIGH,
BATCH_SIZE)
environment = tf_py_environment.TFPyEnvironment(env)
optimal_reward_fn = functools.partial(
environment_utilities.tf_wheel_bandit_compute_optimal_reward,
delta=DELTA,
mu_inside=MU_BASE[0],
mu_high=MU_HIGH)
optimal_action_fn = functools.partial(
environment_utilities.tf_wheel_bandit_compute_optimal_action,
delta=DELTA)
network = q_network.QNetwork(
input_tensor_spec=environment.time_step_spec().observation,
action_spec=environment.action_spec(),
fc_layer_params=(LAYERS))
if FLAGS.agent == 'LinUCB':
agent = lin_ucb_agent.LinearUCBAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
alpha=AGENT_ALPHA,
dtype=tf.float32)
elif FLAGS.agent == 'LinTS':
agent = lin_ts_agent.LinearThompsonSamplingAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
alpha=AGENT_ALPHA,
dtype=tf.float32)
elif FLAGS.agent == 'epsGreedy':
agent = eps_greedy_agent.NeuralEpsilonGreedyAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
reward_network=network,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=LR),
epsilon=EPSILON)
elif FLAGS.agent == 'random':
agent = eps_greedy_agent.NeuralEpsilonGreedyAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
reward_network=network,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=LR),
epsilon=1.)
elif FLAGS.agent == 'Mix':
emit_policy_info = (
policy_utilities.InfoFields.PREDICTED_REWARDS_MEAN, )
agent_epsgreedy = eps_greedy_agent.NeuralEpsilonGreedyAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
reward_network=network,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=LR),
emit_policy_info=emit_policy_info,
epsilon=EPSILON)
agent_linucb = lin_ucb_agent.LinearUCBAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
alpha=AGENT_ALPHA,
emit_policy_info=emit_policy_info,
dtype=tf.float32)
agent_random = eps_greedy_agent.NeuralEpsilonGreedyAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
reward_network=network,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=LR),
emit_policy_info=emit_policy_info,
epsilon=1.)
agent_halfrandom = eps_greedy_agent.NeuralEpsilonGreedyAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
reward_network=network,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=LR),
emit_policy_info=emit_policy_info,
epsilon=0.5)
agent = exp3_mixture_agent.Exp3MixtureAgent(
(agent_epsgreedy, agent_linucb, agent_random,
agent_halfrandom))
regret_metric = tf_bandit_metrics.RegretMetric(optimal_reward_fn)
suboptimal_arms_metric = tf_bandit_metrics.SuboptimalArmsMetric(
optimal_action_fn)
trainer.train(
root_dir=FLAGS.root_dir,
agent=agent,
environment=environment,
training_loops=TRAINING_LOOPS,
steps_per_loop=STEPS_PER_LOOP,
additional_metrics=[regret_metric, suboptimal_arms_metric])
def main(unused_argv):
tf.compat.v1.enable_v2_behavior() # The trainer only runs with V2 enabled.
feature_dict = np.array([str(i) for i in range(DICTIONARY_SIZE)])
def _global_context_sampling_fn():
"""Generates one sample of global features.
It generates a dictionary of size `NUM_GLOBAL_FEATURES`, with the following
syntax:
{...,
'global_feature_4': ['43'],
...
}
That is, the values are one-element numpy arrays of strings.
Returns:
A dictionary with string keys and numpy string array values.
"""
generated_features = feature_dict[np.random.randint(
0, DICTIONARY_SIZE, [NUM_GLOBAL_FEATURES])]
global_features = {
'global_feature_{}'.format(i): generated_features[[i]]
for i in range(NUM_GLOBAL_FEATURES)
}
return global_features
def _arm_context_sampling_fn():
"""Generates one sample of arm features.
It generates a dictionary of size `NUM_ARM_FEATURES`, with the following
syntax:
{...,
'arm_feature_7': ['29'],
...
}
That is, the values are one-element numpy arrays of strings. Note that the
output sample is for one arm and one non-batched time step.
Returns:
A dictionary with string keys and numpy string array values.
"""
generated_features = feature_dict[np.random.randint(
0, DICTIONARY_SIZE, [NUM_ARM_FEATURES])]
arm_features = {
'arm_feature_{}'.format(i): generated_features[[i]]
for i in range(NUM_ARM_FEATURES)
}
return arm_features
def _reward_fn(global_features, arm_features):
"""Outputs a [0, 1] float given a sample.
The output reward is generated by hashing the concatenation of feature keys
and values, then adding all up, taking modulo by 1000, and normalizing.
Args:
global_features: A dictionary with string keys and 1d string numpy array
values.
arm_features: A dictionary with string keys and 1d string numpy array
values.
Returns:
A float value between 0 and 1.
"""
hashed_global = 0
for x, y in global_features.items():
hashed_global += hash(x + y[0])
hashed_arm = 0
for x, y in arm_features.items():
hashed_arm += hash(x + y[0])
return (hashed_global + hashed_arm) % 1000 / 1000
env = sspe.StationaryStochasticStructuredPyEnvironment(
_global_context_sampling_fn,
_arm_context_sampling_fn,
NUM_ACTIONS,
_reward_fn,
batch_size=BATCH_SIZE)
environment = tf_py_environment.TFPyEnvironment(env)
def make_string_feature(name):
return tf.feature_column.indicator_column(
tf.feature_column.categorical_column_with_vocabulary_list(
name, feature_dict))
global_columns = [
make_string_feature('global_feature_{}'.format(i))
for i in range(NUM_GLOBAL_FEATURES)
]
arm_columns = [
make_string_feature('arm_feature_{}'.format(i))
for i in range(NUM_ARM_FEATURES)
]
obs_spec = environment.observation_spec()
if FLAGS.agent == 'epsGredy':
network = (global_and_arm_feature_network.
create_feed_forward_common_tower_network(
obs_spec, (4, 3), (3, 4), (4, 2),
global_preprocessing_combiner=tf.compat.v2.keras.layers.
DenseFeatures(global_columns),
arm_preprocessing_combiner=tf.compat.v2.keras.layers.
DenseFeatures(arm_columns)))
agent = neural_epsilon_greedy_agent.NeuralEpsilonGreedyAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
reward_network=network,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=LR),
epsilon=EPSILON,
accepts_per_arm_features=True,
emit_policy_info=policy_utilities.InfoFields.PREDICTED_REWARDS_MEAN
)
elif FLAGS.agent == 'NeuralLinUCB':
network = (global_and_arm_feature_network.
create_feed_forward_common_tower_network(
obs_spec, (40, 30), (30, 40), (40, 20),
ENCODING_DIM,
global_preprocessing_combiner=tf.compat.v2.keras.layers.
DenseFeatures(global_columns),
arm_preprocessing_combiner=tf.compat.v2.keras.layers.
DenseFeatures(arm_columns)))
agent = neural_linucb_agent.NeuralLinUCBAgent(
time_step_spec=environment.time_step_spec(),
action_spec=environment.action_spec(),
encoding_network=network,
encoding_network_num_train_steps=EPS_PHASE_STEPS,
encoding_dim=ENCODING_DIM,
optimizer=tf.compat.v1.train.AdamOptimizer(learning_rate=LR),
alpha=1.0,
gamma=1.0,
epsilon_greedy=EPSILON,
accepts_per_arm_features=True,
debug_summaries=True,
summarize_grads_and_vars=True,
emit_policy_info=policy_utilities.InfoFields.PREDICTED_REWARDS_MEAN
)
if FLAGS.drop_arm_obs:
drop_arm_feature_fn = bandit_spec_utils.drop_arm_observation
else:
drop_arm_feature_fn = None
trainer.train(root_dir=FLAGS.root_dir,
agent=agent,
environment=environment,
training_loops=TRAINING_LOOPS,
steps_per_loop=STEPS_PER_LOOP,
training_data_spec_transformation_fn=drop_arm_feature_fn)