def __init__(self, config):
self._config = config
self._eps_schedule = LinearSchedule(self._config.eps_begin,
self._config.eps_end,
self._config.nsteps)
self._lr_schedule = LinearSchedule(self._config.lr_begin,
self._config.lr_end,
self._config.lr_nsteps)
self._sim = TrafficSimulator(config)
self._bf = ReplayBuffer(10000, config)
self._action_fn = self.get_action_fn()
self.build()
def __init__(self, config):
self._config = config
self._eps_schedule = LinearSchedule(self._config.eps_begin,
self._config.eps_end,
self._config.nsteps)
self._lr_schedule = LinearSchedule(self._config.lr_begin,
self._config.lr_end,
self._config.lr_nsteps)
self._oq = Order_Queue(self._config.order_path)
self._mq = Message_Queue(self._config.message_path)
self._bf = ReplayBuffer(1000000, config)
self._action_fn = self.get_action_fn()
self.build()
def purge_round():
candidate_leaders_map = {} # {filename --> agent}
# Load in all of the leaders
for leader_checkpoint in os.listdir(LEADER_DIR):
path = os.path.join(LEADER_DIR, leader_checkpoint)
candidate_leader = try_gpu(
DQNAgent(6,
LinearSchedule(0.05, 0.05, 1),
OBSERVATION_MODE,
lr=LR,
max_grad_norm=GRAD_CLIP_NORM,
name=leader_checkpoint))
candidate_leader.load_state_dict(
torch.load(path, map_location=lambda storage, loc: storage))
candidate_leaders_map[leader_checkpoint] = candidate_leader
candidate_scores = [] # list[(filename, score)]
filenames, candidate_leaders = zip(*candidate_leaders_map.items())
for i, (filename,
candidate_leader) in enumerate(zip(filenames, candidate_leaders)):
print "EVALUATING {}".format(candidate_leader.name)
leaders = EnsembleDQNAgent(candidate_leaders[:i] +
candidate_leaders[i + 1:])
candidate_scores.append((filename,
evaluate(candidate_leader, leaders,
EPISODES_EVALUATE_PURGE)))
sorted_scores = sorted(candidate_scores, key=lambda x: x[1], reverse=True)
print "SCORES: {}".format(sorted_scores)
for filename, score in sorted_scores[NUM_LEADERS:]:
print "PURGING ({}, {})".format(filename, score)
leader_path = os.path.join(LEADER_DIR, filename)
graveyard_path = os.path.join(GRAVEYARD_DIR, filename)
os.rename(leader_path, graveyard_path)
def __init__(self,
total_timesteps=100000,
buffer_size=50000,
type_buffer="HER",
prioritized_replay=True,
prioritized_replay_alpha=0.6,
prioritized_replay_beta0=0.4,
prioritized_replay_beta_iters=None,
prioritized_replay_eps=1e-6):
self.buffer_size = buffer_size
self.prioritized_replay_eps = prioritized_replay_eps
self.type_buffer = type_buffer
if prioritized_replay:
if type_buffer == "PER":
self.replay_buffer = PrioritizedReplayBuffer(
buffer_size, alpha=prioritized_replay_alpha)
if type_buffer == "HER":
self.replay_buffer = HighlightReplayBuffer(
buffer_size, alpha=prioritized_replay_alpha)
if prioritized_replay_beta_iters is None:
prioritized_replay_beta_iters = total_timesteps
self.beta_schedule = LinearSchedule(
prioritized_replay_beta_iters,
initial_p=prioritized_replay_beta0,
final_p=1.0)
else:
self.replay_buffer = ReplayBuffer(buffer_size)
self.beta_schedule = None
def __init__(self,
state_size,
action_size,
num_agents,
seed,
fc1=400,
fc2=300,
update_times=10,
weight_decay=1.e-5):
"""Initialize an Agent object.
Params
======
state_size (int): dimension of each state
action_size (int): dimension of each action
seed (int): random seed
"""
self.state_size = state_size
self.action_size = action_size
self.seed = random.seed(seed)
self.num_agents = num_agents
self.n_seed = np.random.seed(seed)
self.update_times = update_times
self.n_step = 0
self.noise = []
for i in range(num_agents):
self.noise.append(
rm.OrnsteinUhlenbeckProcess(size=(action_size, ),
std=LinearSchedule(0.2)))
# critic local and target network (Q-Learning)
self.critic_local = Critic(state_size, action_size, fc1, fc2,
seed).to(device)
self.critic_target = Critic(state_size, action_size, fc1, fc2,
seed).to(device)
self.critic_target.load_state_dict(self.critic_local.state_dict())
# actor local and target network (Policy gradient)
self.actor_local = Actor(state_size, action_size, fc1, fc2,
seed).to(device)
self.actor_target = Actor(state_size, action_size, fc1, fc2,
seed).to(device)
self.actor_target.load_state_dict(self.actor_local.state_dict())
# optimizer for critic and actor network
self.optimizer_critic = optim.Adam(self.critic_local.parameters(),
lr=CRITIC_LR,
weight_decay=1.e-5)
self.optimizer_actor = optim.Adam(self.actor_local.parameters(),
lr=ACTOR_LR)
# Replay memory
self.memory = ReplayBuffer(action_size, BUFFER_SIZE, BATCH_SIZE, seed)
# Initialize time step (for updating every UPDATE_EVERY steps)
self.t_step = 0
self.a_step = 0
def __init__(self, size=5000, epsilon=0.01,
alpha=0.6, beta=0.4, num_steps=int(1e6)):
super(PrioritizedReplayBuffer, self).__init__(size=size)
self.size = size
self.epsilon = epsilon
self.alpha = alpha
self.beta = LinearSchedule(min_val=beta, max_val=1.0,
num_steps=num_steps)
self.probs = deque(maxlen=size)
self._max_prob = epsilon
def main(num_epochs):
exploration_schedule = LinearSchedule(300000, 0.1)
dqn_learing(
dataLoader=videoLoader,
num_epochs=num_epochs,
feature_size=2048,
num_classes=101,
r_p=0.01,
q_func=QNet,
exploration=exploration_schedule,
replay_buffer_size=REPLAY_BUFFER_SIZE,
batch_size=BATCH_SIZE,
gamma=GAMMA,
learning_starts=LEARNING_STARTS,
learning_freq=LEARNING_FREQ,
frame_history_len=FRAME_HISTORY_LEN,
target_update_freq=TARGER_UPDATE_FREQ,
)
def train_maze(output_path):
config = Config()
config.set_paths(output_path)
env = EnvMaze(n=config.maze_size, hard=config.hard)
# exploration strategy
exp_schedule = LinearExploration(env, config.eps_begin,
config.eps_end, config.eps_nsteps, config.env_name)
# learning rate schedule
lr_schedule = LinearSchedule(config.lr_begin, config.lr_end,
config.lr_nsteps, config.env_name)
# train model
print(config.output_path)
model = NatureQN(env, config)
model.bfs_len = env.get_bfs_length()
evaluation_result_list, oos_evalution_result_list = model.run(exp_schedule, lr_schedule)
return evaluation_result_list, oos_evalution_result_list
def __init__(self,
total_timesteps=100000,
buffer_size=50000,
prioritized_replay=False,
prioritized_replay_alpha=0.6,
prioritized_replay_beta0=0.4,
prioritized_replay_beta_iters=None,
prioritized_replay_eps=1e-6):
self.buffer_size = buffer_size
if prioritized_replay:
self.replay_buffer = PrioritizedReplayBuffer(
buffer_size, alpha=prioritized_replay_alpha)
if prioritized_replay_beta_iters is None:
prioritized_replay_beta_iters = total_timesteps
beta_schedule = LinearSchedule(prioritized_replay_beta_iters,
initial_p=prioritized_replay_beta0,
final_p=1.0)
else:
self.replay_buffer = ReplayBuffer(buffer_size)
beta_schedule = None
invader = Invader(speed=1)
guard = Guard2Targets(speed=1)
target = Target(speed=0)
env = Environment2Targets([32, 32], guard, invader, target)
OptimizerSpec = namedtuple("OptimizerSpec", ["constructor", "kwargs"])
Statistic = {"mean_episode_rewards": [], "best_mean_episode_rewards": []}
optimizer_spec = OptimizerSpec(
constructor=optim.RMSprop,
kwargs=dict(lr=LEARNING_RATE, alpha=ALPHA, eps=EPS),
)
exploration_schedule = LinearSchedule(100000, 0.1)
# Construct an epilson greedy policy with given exploration schedule
def select_epilson_greedy_action(model, obs, t):
sample = random.random()
eps_threshold = exploration_schedule.value(t)
if sample > eps_threshold:
obs = torch.from_numpy(obs).type(dtype).unsqueeze(0) / 255.0
# Use volatile = True if variable is only used in inference mode, i.e. don't save the history
return model(Variable(obs)).data.max(1)[1].cpu()
else:
return torch.IntTensor([[random.randrange(NUM_ACTIONS)]])
# vis = visdom.Visdom(port=8124)
student_config.lr_nsteps = args.nsteps_train / 2
student_config.exp_policy = args.exp_policy
# make env
env = gym.make(student_config.env_name)
if hasattr(student_config, 'skip_frame'):
env = MaxAndSkipEnv(env, skip=student_config.skip_frame)
if hasattr(student_config, 'preprocess_state'
) and student_config.preprocess_state is not None:
env = PreproWrapper(env,
prepro=greyscale,
shape=(80, 80, 1),
overwrite_render=student_config.overwrite_render)
# exploration strategy
if student_config.exp_policy == 'egreedy':
exp_schedule = LinearExploration(env, student_config.eps_begin,
student_config.eps_end,
student_config.eps_nsteps)
else:
exp_schedule = LinearGreedyExploration(env, student_config.eps_begin,
student_config.eps_end,
student_config.eps_nsteps)
# learning rate schedule
lr_schedule = LinearSchedule(student_config.lr_begin,
student_config.lr_end,
student_config.lr_nsteps)
# train model
model = DistilledQN(env, student_config)
model.run(exp_schedule, lr_schedule)
You'll find the results, log and video recordings of your agent every 250k under
the corresponding file in the results folder. A good way to monitor the progress
of the training is to use Tensorboard. The starter code writes summaries of different
variables.
To launch tensorboard, open a Terminal window and run
tensorboard --logdir=results/
Then, connect remotely to
address-ip-of-the-server:6006
6006 is the default port used by tensorboard.
"""
if __name__ == '__main__':
# make env
env = gym.make(config.env_name)
env = MaxAndSkipEnv(env, skip=config.skip_frame)
env = PreproWrapper(env,
prepro=greyscale,
shape=(80, 80, 1),
overwrite_render=config.overwrite_render)
# exploration strategy
exp_schedule = LinearExploration(env, config.eps_begin, config.eps_end,
config.eps_nsteps)
# learning rate schedule
lr_schedule = LinearSchedule(config.lr_begin, config.lr_end,
config.lr_nsteps)
# train model
model = NatureQN(env, config)
model.run(exp_schedule, lr_schedule)
def learn(env,
q_func,
lr=5e-4,
max_timesteps=100000,
buffer_size=50000,
exploration_fraction=0.1,
exploration_final_eps=0.02,
train_freq=1,
batch_size=32,
print_freq=1,
checkpoint_freq=10000,
learning_starts=1000,
gamma=1.0,
target_network_update_freq=500,
prioritized_replay=False,
prioritized_replay_alpha=0.6,
prioritized_replay_beta0=0.4,
prioritized_replay_beta_iters=None,
prioritized_replay_eps=1e-6,
num_cpu=16,
callback=None):
"""Train a deepq model.
Parameters
-------
env : gym.Env
environment to train on
q_func: (tf.Variable, int, str, bool) -> tf.Variable
the model that takes the following inputs:
observation_in: object
the output of observation placeholder
num_actions: int
number of actions
scope: str
reuse: bool
should be passed to outer variable scope
and returns a tensor of shape (batch_size, num_actions) with values of every action.
lr: float
learning rate for adam optimizer
max_timesteps: int
number of env steps to optimizer for
buffer_size: int
size of the replay buffer
exploration_fraction: float
fraction of entire training period over which the exploration rate is annealed
exploration_final_eps: float
final value of random action probability
train_freq: int
update the model every `train_freq` steps.
set to None to disable printing
batch_size: int
size of a batched sampled from replay buffer for training
print_freq: int
how often to print out training progress
checkpoint_freq: int
how often to save the model. This is so that the best version is restored
at the end of the training. If you do not wish to restore the best version at
the end of the training set this variable to None.
learning_starts: int
how many steps of the model to collect transitions for before learning starts
gamma: float
discount factor
target_network_update_freq: int
update the target network every `target_network_update_freq` steps.
prioritized_replay: True
if True prioritized replay buffer will be used.
prioritized_replay_alpha: float
alpha parameter for prioritized replay buffer
prioritized_replay_beta0: float
initial value of beta for prioritized replay buffer
prioritized_replay_beta_iters: int
number of iterations over which beta will be annealed from initial value
to 1.0. If set to None equals to max_timesteps.
prioritized_replay_eps: float
epsilon to add to the TD errors when updating priorities.
num_cpu: int
number of cpus to use for training
callback: (locals, globals) -> None
function called at every steps with state of the algorithm.
If callback returns true training stops.
Returns
-------
act: ActWrapper
Wrapper over act function. Adds ability to save it and load it.
See header of baselines/deepq/categorical.py for details on the act function.
"""
# Create all the functions necessary to train the model
sess = U.make_session(num_cpu=num_cpu)
sess.__enter__()
def make_obs_ph(name):
return U.BatchInput([84, 84], name=name)
act, train, update_target, debug = build_train(
make_obs_ph=make_obs_ph,
q_func=q_func,
num_actions=2,
optimizer=tf.train.AdamOptimizer(learning_rate=lr),
gamma=gamma,
grad_norm_clipping=10)
act_params = {
'make_obs_ph': make_obs_ph,
'q_func': q_func,
'num_actions': 2,
}
# Create the replay buffer
if prioritized_replay:
replay_buffer = PrioritizedReplayBuffer(buffer_size,
alpha=prioritized_replay_alpha)
if prioritized_replay_beta_iters is None:
prioritized_replay_beta_iters = max_timesteps
beta_schedule = LinearSchedule(prioritized_replay_beta_iters,
initial_p=prioritized_replay_beta0,
final_p=1.0)
else:
replay_buffer = ReplayBuffer(buffer_size)
beta_schedule = None
# Create the schedule for exploration starting from 1.
exploration = LinearSchedule(schedule_timesteps=int(exploration_fraction *
max_timesteps),
initial_p=1.0,
final_p=exploration_final_eps)
# Initialize the parameters and copy them to the target network.
U.initialize()
update_target()
episode_rewards = [0.0]
saved_mean_reward = None
obs = env.step(0)
with tempfile.TemporaryDirectory() as td:
model_saved = False
model_file = os.path.join(td, "model")
for t in range(max_timesteps):
if callback is not None:
if callback(locals(), globals()):
break
# Take action and update exploration to the newest value
action = act(np.array(obs)[None],
update_eps=exploration.value(t))[0]
new_obs, rew, done, _ = env.step(action)
# Store transition in the replay buffer.
replay_buffer.add(obs, action, rew, new_obs, float(done))
obs = new_obs
episode_rewards[-1] += rew
if done:
#obs = env.reset()
episode_rewards.append(0)
if t > learning_starts and t % train_freq == 0:
# Minimize the error in Bellman's equation on a batch sampled from replay buffer.
if prioritized_replay:
experience = replay_buffer.sample(
batch_size, beta=beta_schedule.value(t))
(obses_t, actions, rewards, obses_tp1, dones, weights,
batch_idxes) = experience
else:
obses_t, actions, rewards, obses_tp1, dones = replay_buffer.sample(
batch_size)
weights, batch_idxes = np.ones_like(rewards), None
td_errors = train(obses_t, actions, rewards, obses_tp1, dones,
np.ones_like(rewards))
if prioritized_replay:
new_priorities = np.abs(td_errors) + prioritized_replay_eps
replay_buffer.update_priorities(batch_idxes,
new_priorities)
if t > learning_starts and t % target_network_update_freq == 0:
# Update target network periodically.
update_target()
mean_100ep_reward = round(np.mean(episode_rewards[-101:-1]), 1)
num_episodes = len(episode_rewards)
if done and print_freq is not None and len(
episode_rewards) % print_freq == 0:
#logger.record_tabular("steps", t)
#logger.record_tabular("episodes", num_episodes)
#logger.record_tabular("mean 100 episode reward", mean_100ep_reward)
#logger.record_tabular("% time spent exploring", int(100 * exploration.value(t)))
#logger.dump_tabular()
print("steps: {}".format(t))
print("episodes: {}".format(num_episodes))
print("mean 100 episode reward: {}".format(mean_100ep_reward))
print("% time spent exploring: {}".format(
int(100 * exploration.value(t))))
if (checkpoint_freq is not None and t > learning_starts
and num_episodes > 100 and t % checkpoint_freq == 0):
if saved_mean_reward is None or mean_100ep_reward > saved_mean_reward:
#if print_freq is not None:
#logger.log("Saving model due to mean reward increase: {} -> {}".format(
# saved_mean_reward, mean_100ep_reward))
U.save_state(model_file)
model_saved = True
saved_mean_reward = mean_100ep_reward
if model_saved:
#if print_freq is not None:
#logger.log("Restored model with mean reward: {}".format(saved_mean_reward))
U.load_state(model_file)
return ActWrapper(act, act_params)
class model(object):
def __init__(self, config):
self._config = config
self._eps_schedule = LinearSchedule(self._config.eps_begin,
self._config.eps_end,
self._config.nsteps)
self._lr_schedule = LinearSchedule(self._config.lr_begin,
self._config.lr_end,
self._config.lr_nsteps)
self._oq = Order_Queue(self._config.order_path)
self._mq = Message_Queue(self._config.message_path)
self._bf = ReplayBuffer(1000000, config)
self._action_fn = self.get_action_fn()
self.build()
def build(self):
pass
def initialize(self):
pass
def get_random_action(self, state):
pass
def get_best_action(self, state):
### return action, q value
pass
def get_action(self, state):
if np.random.random() < self._eps_schedule.get_epsilon():
return self.get_random_action(state)[0]
else:
return self.get_best_action(state)[0]
def get_random_action_fn(self):
def random_action_fn(t, amount, state, mid_price):
action = np.random.randint(
self._config.L) # action = L for market order
price = (action -
self._config.L // 2) * self._config.base_point + mid_price
return (price, action)
return random_action_fn
def get_action_fn(self):
def action_fn(t, amount, state, mid_price):
action = self.get_action(state)
price = (action -
self._config.L // 2) * self._config.base_point + mid_price
return (price, action)
return action_fn
def pad_state(self, states, state_history):
tmp_states, tmp_its = zip(*states)
tmp_state = np.concatenate(
[np.expand_dims(state, -1) for state in tmp_states], axis=-1)
tmp_state = np.pad(tmp_state,
((0, 0), (0, 0),
(state_history - tmp_state.shape[-1], 0)),
'constant',
constant_values=0)
tmp_it = tmp_its[-1]
return ([tmp_state], [tmp_it])
def simulate_an_episode(self, amount, T, H, start_time, order_direction,
action_fn, depth):
dH = H // T
self._mq.reset()
lob_data = self._oq.create_orderbook_time(start_time, self._mq)
lob = Limit_Order_book(**lob_data,
own_amount_to_trade=0,
own_init_price=-order_direction *
Limit_Order_book._DUMMY_VARIABLE,
own_trade_type=order_direction)
rewards = []
states = []
actions = []
done_mask = []
amount_remain = amount
cum_reward = 0
for t in range(start_time, start_time + H - dH, dH):
tmp1 = 1.0 * amount_remain / amount # amount remain
tmp2 = 1.0 * (start_time + H - t) / H # time remain
state = (lob.display_book(depth),
np.array([tmp1, tmp2], dtype=float))
state = self.process_state(state)
states.append(state)
mid_price = lob.get_mid_price()
state_input = self.pad_state(states[-self._config.state_history:],
self._config.state_history)
price, action = action_fn(start_time + H - t, amount_remain,
state_input, mid_price)
actions.append(action)
done_mask.append(False)
lob.update_own_order(price, amount_remain)
for idx, message in self._mq.pop_to_next_time(t + dH):
lob.process(**message)
if lob.own_amount_to_trade == 0:
done_mask.append(True)
state = (lob.display_book(depth),
np.array([
0, 1.0 * (start_time + H - self._mq._time) / H
],
dtype=float))
state = self.process_state(state)
states.append(state)
rewards.append(lob.own_reward - cum_reward)
break
if done_mask[-1]:
break
else:
# What is going on over here?
rewards.append(lob.own_reward - cum_reward)
cum_reward = lob.own_reward
amount_remain = lob.own_amount_to_trade
if not done_mask[-1]:
tmp1 = 1.0 * amount_remain / amount
tmp2 = 1.0 * (start_time + H - t - dH) / H
state = (lob.display_book(depth),
np.array([tmp1, tmp2], dtype=float))
state = self.process_state(state)
states.append(state)
done_mask.append(False)
lob.update_own_order(lob.own_trade_type *
Limit_Order_book._DUMMY_VARIABLE)
if lob.own_amount_to_trade == 0:
rewards.append(lob.own_reward - cum_reward)
else:
rewards.append(-Limit_Order_book._DUMMY_VARIABLE)
tmp1 = 1.0 * lob.own_amount_to_trade / amount
state = (lob.display_book(depth), np.array([tmp1, 0], dtype=float))
state = self.process_state(state)
states.append(state)
actions.append(self._config.L)
done_mask.append(True)
return (states, rewards, actions, done_mask[1:])
def sampling_buffer(self):
for start_time in range(self._config.train_start,
self._config.train_end, self._config.H):
states, rewards, actions, done_mask = self.simulate_an_episode(
self._config.I, self._config.T, self._config.H, start_time,
self._config.direction, self._action_fn, self._config.depth)
self._bf.store(states, actions, rewards, done_mask)
def process_state(self, state):
state_book, state_it = state
state_book = state_book.astype('float32')
state_book[:, 0] /= 1.e6
state_book[:, 1] /= 1.e2
state_book[:, 2] /= 1.e6
state_book[:, 3] /= 1.e2
return (state_book, state_it)
model.compile(optimizer=Adam(lr=0.001), loss='mae')
model.summary()
return model
model = create_model()
if os.path.isfile(WEIGHTS_PATH) and os.access(WEIGHTS_PATH, os.R_OK):
model.load_weights(WEIGHTS_PATH)
# memory = deque(maxlen=MEMORY)
env = gym.make(ENV_NAME)
replay_buffer = PrioritizedReplayBuffer(MEMORY, alpha=prioritized_replay_alpha)
beta_schedule = LinearSchedule(prioritized_replay_beta_iters,
initial_p=prioritized_replay_beta0,
final_p=1.0)
eps_schedule = LinearSchedule(eps_iters, initial_p=eps0, final_p=0.1)
def get_action(ob, epsilon):
moves = env.action_space
q_values = []
observations = np.expand_dims(ob, 0)
for move in moves:
action = np.zeros((80, ))
if move > 99:
action[move - 29] = 1
else:
class model(object):
def __init__(self, config):
self._config = config
self._eps_schedule = LinearSchedule(self._config.eps_begin,
self._config.eps_end,
self._config.nsteps)
self._lr_schedule = LinearSchedule(self._config.lr_begin,
self._config.lr_end,
self._config.lr_nsteps)
self._sim = TrafficSimulator(config)
self._bf = ReplayBuffer(10000, config)
self._action_fn = self.get_action_fn()
self.build()
def build(self):
pass
def initialize(self):
pass
def get_random_action(self, state):
pass
def get_best_action(self, state):
### return action, q value
pass
def get_action(self, state):
if np.random.random() < self._eps_schedule.get_epsilon():
return self.get_random_action(state)[0]
else:
return self.get_best_action(state)[0]
def get_random_action_fn(self):
def random_action_fn(state):
action = np.random.randint(5)
return action
return random_action_fn
def get_action_fn(self):
return self.get_action
def pad_state(self, states, state_history):
tmp_states = states
tmp_state = np.concatenate(
[np.expand_dims(state, -1) for state in tmp_states], axis=-1)
tmp_state = np.pad(tmp_state,
((0, 0), (state_history - tmp_state.shape[-1], 0)),
'constant',
constant_values=0)
return [tmp_state]
def simulate_an_episode(self, T, action_fn):
rewards = []
states = []
actions = []
self._sim.reset()
cum_reward = 0
for t in range(T):
state = self._sim.state()
states.append(state)
state_input = self.pad_state(states[-self._config.state_history:],
self._config.state_history)
action = action_fn(state_input)
actions.append(action)
reward = self._sim.progress(action)
rewards.append(reward)
return (states, rewards, actions)
def sampling_buffer(self):
for s in range(self._config.nBufferSample):
if s % 20 == 0:
print("Sample buffer: ", s)
states, rewards, actions = self.simulate_an_episode(
self._config.T, self._action_fn)
self._bf.store(states, actions, rewards)
outside_value=student_config.exp_outside_value)
# exp_schedule = LinearExploration(env, student_config.eps_begin,
# student_config.eps_end, student_config.eps_nsteps)
# learning rate schedule
lr_schedule = PiecewiseSchedule(
student_config.lr_endpoints,
outside_value=student_config.lr_outside_value)
# lr_schedule = LinearSchedule(student_config.lr_begin, student_config.lr_end,
# student_config.lr_nsteps)
# teacher choice strategy
num_teachers = len(args.teacher_checkpoint_dirs)
if args.choose_teacher_q in ['eps_greedy_bandit']:
eps_schedule = LinearSchedule(student_config.teacher_choice_eps_begin,
student_config.teacher_choice_eps_end,
student_config.teacher_choice_eps_nsteps)
if args.bandit_reward_method == 'rolling_avg':
bandit_alpha_schedule = LinearSchedule(
student_config.teacher_choice_bandit_alpha_begin,
student_config.teacher_choice_bandit_alpha_end,
student_config.teacher_choice_bandit_alpha_nsteps)
elif args.bandit_reward_method == 'avg_all_time':
bandit_alpha_schedule = None
if args.choose_teacher_q == 'random_bandit':
choose_teacher_strategy = RandomBandit(num_teachers,
args.bandit_reward_method,
bandit_alpha_schedule)
elif args.choose_teacher_q == 'eps_greedy_bandit':
choose_teacher_strategy = EpsilonGreedyBandit(
elif FLAGS.network_type == 'recurrent_q':
network = network.RecurrentQ(FLAGS)
elif FLAGS.network_type == 'transfer_q':
network = network.TransferQ(FLAGS)
elif FLAGS.network_type == 'deep_ac':
network = network.DeepAC(FLAGS)
else: raise NotImplementedError
# Initialize exploration strategy
exp_schedule = LinearExploration(env, FLAGS.epsilon, FLAGS.eps_end, FLAGS.eps_nsteps)
# Initialize exploration rate schedule
lr_schedule = LinearSchedule(FLAGS.learning_rate, FLAGS.lr_end, FLAGS.lr_nsteps)
# train model
model = None
if FLAGS.model_type == 'q':
model = Model(env, record_env, network, FLAGS)
elif FLAGS.model_type == 'ac':
model = ModelAC(env, record_env, network, FLAGS)
else:
raise NotImplementedError
if FLAGS.record_only:
model.record_videos(FLAGS.model_path+'checkpoint')
else:
try:
model.run(exp_schedule, lr_schedule)
def learn(env,
lr=1e-4,
total_timesteps=100000,
buffer_size=50000,
exploration_fraction=0.1,
exploration_final_eps=0.02,
train_freq=1,
action_repeat=4,
batch_size=32,
learning_starts=1000,
gamma=0.99,
target_network_update_freq=500,
model_identifier='agent'):
""" Train a deep q-learning model.
Parameters
-------
env: gym.Env
environment to train on
lr: float
learning rate for adam optimizer
total_timesteps: int
number of env steps to take
buffer_size: int
size of the replay buffer
exploration_fraction: float
fraction of entire training period over which the exploration rate is annealed
exploration_final_eps: float
final value of random action probability
train_freq: int
update the model every `train_freq` steps.
action_repeat: int
selection action on every n-th frame and repeat action for intermediate frames
batch_size: int
size of a batched sampled from replay buffer for training
learning_starts: int
how many steps of the model to collect transitions for before learning starts
gamma: float
discount factor
target_network_update_freq: int
update the target network every `target_network_update_freq` steps.
model_identifier: string
identifier of the agent
"""
episode_rewards = [0.0]
training_losses = []
actions = get_action_set()
action_size = len(actions)
device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
# Build networks
policy_net = DQN(action_size, device).to(device)
target_net = DQN(action_size, device).to(device)
target_net.load_state_dict(policy_net.state_dict())
target_net.eval()
# Create replay buffer
replay_buffer = ReplayBuffer(buffer_size)
# Create optimizer
optimizer = optim.Adam(policy_net.parameters(), lr=lr)
# Create the schedule for exploration starting from 1.
exploration = LinearSchedule(schedule_timesteps=int(exploration_fraction *
total_timesteps),
initial_p=1.0,
final_p=exploration_final_eps)
# Initialize environment and get first state
obs = get_state(env.reset())
# Iterate over the total number of time steps
try:
for t in range(total_timesteps):
# Select action
action_id = select_exploratory_action(obs, policy_net, action_size,
exploration, t)
env_action = actions[action_id]
# Perform action fram_skip-times
for f in range(action_repeat):
new_obs, rew, done, _ = env.step(env_action)
episode_rewards[-1] += rew
# if episode_rewards[-1] < termination_reward:
# done = True
if done:
break
# Store transition in the replay buffer.
new_obs = get_state(new_obs)
replay_buffer.add(obs, action_id, rew, new_obs, float(done))
obs = new_obs
if done:
# Start new episode after previous episode has terminated
print("timestep: " + str(t) + " \t reward: " +
str(episode_rewards[-1]))
obs = get_state(env.reset())
episode_rewards.append(0.0)
if t > learning_starts and t % train_freq == 0:
# Minimize the error in Bellman's equation on a batch sampled from replay buffer.
loss = perform_qlearning_step(policy_net, target_net,
optimizer, replay_buffer,
batch_size, gamma, device)
training_losses.append(loss)
if t > learning_starts and t % target_network_update_freq == 0:
# Update target network periodically.
update_target_net(policy_net, target_net)
if total_timesteps % 1000 == 0:
# Save the trained policy network
torch.save(policy_net.state_dict(), model_identifier + '.pt')
# Visualize the training loss and cumulative reward curves
visualize_training(episode_rewards, training_losses,
model_identifier)
except KeyboardInterrupt:
pass
finally:
# Save the trained policy network
torch.save(policy_net.state_dict(), model_identifier + '.pt')
# Visualize the training loss and cumulative reward curves
visualize_training(episode_rewards, training_losses, model_identifier)
def challenger_round():
challengers = []
leaders = []
leader_checkpoints = os.listdir(LEADER_DIR)
# Need to share the same schedule with all challengers, so they all anneal
# at same rate
epsilon_schedule = LinearSchedule(EPS_START, EPS_END, TRAIN_FRAMES)
for i in xrange(NUM_LEADERS):
challenger = try_gpu(
DQNAgent(6,
epsilon_schedule,
OBSERVATION_MODE,
lr=LR,
max_grad_norm=GRAD_CLIP_NORM))
if i < len(leader_checkpoints):
leader = try_gpu(
DQNAgent(6, LinearSchedule(0.1, 0.1, 500000),
OBSERVATION_MODE))
leader_path = os.path.join(LEADER_DIR, leader_checkpoints[i])
print "LOADING CHECKPOINT: {}".format(leader_path)
challenger.load_state_dict(
torch.load(leader_path,
map_location=lambda storage, loc: storage))
leader.load_state_dict(
torch.load(leader_path,
map_location=lambda storage, loc: storage))
else:
leader = RandomAgent(6)
print "INITIALIZING NEW CHALLENGER AND LEADER"
challengers.append(challenger)
leaders.append(leader)
if CHALLENGER_DIR is not None:
challengers = []
# Load in all of the leaders
for checkpoint in os.listdir(CHALLENGER_DIR):
path = os.path.join(CHALLENGER_DIR, checkpoint)
print "LOADING FROM CHALLENGER_DIR: {}".format(path)
challenger = try_gpu(
DQNAgent(6,
LinearSchedule(0.05, 0.05, 1),
CHALLENGER_OBSERVATION_MODE,
lr=LR,
max_grad_norm=GRAD_CLIP_NORM,
name=checkpoint))
challenger.load_state_dict(
torch.load(path, map_location=lambda storage, loc: storage))
challengers.append(challenger)
challenger = EnsembleDQNAgent(challengers)
leader = EnsembleDQNAgent(leaders)
if OPPONENT is not None or HUMAN:
leader = NoOpAgent()
replay_buffer = ReplayBuffer(1000000)
rewards = collections.deque(maxlen=1000)
frames = 0 # number of training frames seen
episodes = 0 # number of training episodes that have been played
with tqdm(total=TRAIN_FRAMES) as progress:
# Each loop completes a single episode
while frames < TRAIN_FRAMES:
states = env.reset()
challenger.reset()
leader.reset()
episode_reward = 0.
episode_frames = 0
# Each loop completes a single step, duplicates _evaluate() to
# update at the appropriate frame #s
for _ in xrange(MAX_EPISODE_LENGTH):
frames += 1
episode_frames += 1
action1 = challenger.act(states[0])
action2 = leader.act(states[1])
next_states, reward, done = env.step(action1, action2)
episode_reward += reward
# NOTE: state and next_state are LazyFrames and must be
# converted to np.arrays
replay_buffer.add(
Experience(states[0], action1._action_index, reward,
next_states[0], done))
states = next_states
if len(replay_buffer) > 50000 and \
frames % 4 == 0:
experiences = replay_buffer.sample(32)
challenger.update_from_experiences(experiences)
if frames % 10000 == 0:
challenger.sync_target()
if frames % SAVE_FREQ == 0:
# TODO: Don't access internals
for agent in challenger._agents:
path = os.path.join(LEADER_DIR,
agent.name + "-{}".format(frames))
print "SAVING CHECKPOINT TO: {}".format(path)
torch.save(agent.state_dict(), path)
#path = os.path.join(
# LEADER_DIR, challenger.name + "-{}".format(frames))
#torch.save(challenger.state_dict(), path)
if frames >= TRAIN_FRAMES:
break
if done:
break
if episodes % 300 == 0:
print "Evaluation: {}".format(
evaluate(challenger, leader, EPISODES_EVALUATE_TRAIN))
print "Episode reward: {}".format(episode_reward)
episodes += 1
rewards.append(episode_reward)
stats = challenger.stats
stats["Avg Episode Reward"] = float(sum(rewards)) / len(rewards)
stats["Num Episodes"] = episodes
stats["Replay Buffer Size"] = len(replay_buffer)
progress.set_postfix(stats, refresh=False)
progress.update(episode_frames)
episode_frames = 0