def make_mujoco_env(env_id, seed):
"""
Create a wrapped, monitored gym.Env for MuJoCo.
"""
rank = MPI.COMM_WORLD.Get_rank()
set_global_seeds(seed + 10000 * rank)
env = gym.make(env_id)
logger.configure()
env = Monitor(env, os.path.join(logger.get_dir(), str(rank)))
env.seed(seed)
return env
def _thunk():
env = make_atari(env_id)
env.seed(seed + rank)
env = Monitor(
env,
logger.get_dir() and os.path.join(logger.get_dir(), str(rank)))
return wrap_deepmind(env, **wrapper_kwargs)
def main():
statsd_client = StatsClient(statsd_host, statsd_port, prefix="wifi.parse.data")
statsd_client.gauge("WA_SOURCE_FJ_1001.success", 0)
statsd_client.gauge("WA_SOURCE_FJ_1001.failed", 0)
statsd_client.gauge("WA_BASIC_FJ_1003.success", 0)
statsd_client.gauge("WA_BASIC_FJ_1003.failed", 0)
statsd_client.gauge("file.failed", 0)
list = os.listdir(config["monitor_path"]) # 列出文件夹下所有的目录与文件
for i in list:
com_path = os.path.join(config["monitor_path"], i)
Monitor(stastd=statsd_client, zipinfo="True").operate_change(com_path)
event_handler = Monitor(stastd=statsd_client)
observer = Observer()
observer.schedule(event_handler, path=config["monitor_path"], recursive=True) # recursive递归的
observer.start()
observer.join()
def make_robotics_env(env_id, seed, rank=0):
"""
Create a wrapped, monitored gym.Env for MuJoCo.
"""
set_global_seeds(seed)
env = gym.make(env_id)
env = FlattenDictWrapper(env, ['observation', 'desired_goal'])
env = Monitor(env,
logger.get_dir()
and os.path.join(logger.get_dir(), str(rank)),
info_keywords=('is_success', ))
env.seed(seed)
return env
def test(self):
mon = Gdk.Display.get_monitor(Gdk.Display.get_default(), 0)
monitor = Monitor.from_monitor(mon)
hwinfo = HWinfo()
hwinfo_data = hwinfo.dmi_load()
manufacturer = hwinfo_data['sys_vendor'].lower()
model = hwinfo_data['product_name'].lower()
expected_width = self.expected_width
expected_height = self.expected_height
if monitor.width != expected_width or monitor.height != expected_height:
self.fail(
"Internal display did not match expected resolution, expected: "
"{0}x{1} got: {2}x{3}".format(expected_width, expected_height,
monitor.width, monitor.height))
def main(_):
# create visualizer
#visualizer = TensorboardVisualizer()
monitor = Monitor(FLAGS)
#log_dir = monitor.log_dir
#visualizer.initialize(log_dir, None)
saved_mean_reward = None
# openAI logger
L.configure(monitor.log_dir, format_strs=['stdout', 'csv'])
# initialize env
atari_env = AtariEnv(monitor)
#screen_shot_subgoal(atari_env)
# we should probably follow deepmind style env
# stack 4 frames and scale float
env = wrapper.wrap_deepmind(atari_env, frame_stack=True, scale=True)
# get default tf_session
sess = U.get_session()
# create q networks for controller
controller_optimizer = tf.train.AdamOptimizer(learning_rate=LEARNING_RATE)
controller_network = Q_network(env.observation_space, env.action_space.n, controller_optimizer, scope='controller')
controller = Controller(controller_network, env.action_space.n)
# create q networks for meta-controller
num_goals = env.unwrapped.goals_space.n
metacontroller_optimizer = tf.train.AdamOptimizer(learning_rate=LEARNING_RATE)
metacontroller_network = Q_network(env.observation_space, num_goals, metacontroller_optimizer, scope='metacontroller')
metacontroller = MetaController(metacontroller_network, num_goals)
# Create the schedule for exploration starting from 1.
exploration2 = LinearSchedule(schedule_timesteps=int(EXPLORATION_FRACTION * monitor.num_timesteps),
initial_p=1.0,
final_p=EXPLORATION_FINAL_EPS)
# initialize experience replay
controller_replay_buffer = ReplayBuffer(D1_MEMORY_SIZE)
metacontroller_replay_buffer = ReplayBuffer(D2_MEMORY_SIZE)
# initialize critic
critic = Critic(env.unwrapped)
total_extrinsic_reward = []
# for success rate
total_goal_reached = np.zeros(num_goals, dtype=np.int32)
total_goal_sampled = np.zeros(num_goals, dtype=np.int32)
total_goal_epsilon = np.ones(num_goals, dtype=np.float32)
ep = 0
total_step = 0
init_ob = env.reset()
U.initialize()
# initialize target network in both controller and meta
sess.run(metacontroller.network.update_target_op)
sess.run(controller.network.update_target_op)
# load ckpt if presence
model_path = tf.train.latest_checkpoint(monitor.ckpt_dir)
model_saved = False
model_file = os.path.join(monitor.ckpt_dir, 'model')
if model_path is not None:
U.load_variables(model_file)
L.log('loaded model from %s' % model_file)
model_saved = True
while ep < MAX_EPISODE: # count number of steps
# init environment game play variables
init_ob = env.reset()
observation = np.reshape(init_ob['observation'], (1, )+init_ob['observation'].shape)
desired_goal = metacontroller.sample_act(sess, observation, update_eps=1.0)[0]
env.unwrapped.desired_goal = desired_goal
total_goal_sampled[desired_goal] += 1
# given predicted goal, we encode this goal bounding mask to the observation np array
ob_with_g = env.unwrapped._add_goal_mask(init_ob['observation'], desired_goal)
# NOTE: Below code verify added mask correctly
# for i in range(ob_with_g.shape[-1]):
# ob = ob_with_g[:,:,i]
# image = Image.fromarray(ob)
# image = image.convert('RGB')
# image.save('test_%i.png' % i)
done = False
reached_goal = False
while not done:
extrinsic_rewards = 0
s0 = init_ob['observation']
while not (done or reached_goal):
update_eps1_with_respect_to_g = get_epsilon(total_goal_epsilon, total_goal_reached, total_goal_sampled, desired_goal, total_step, EXPLORATION_WARM_UP)
ob_with_g_reshaped = np.reshape(ob_with_g, (1, )+ob_with_g.shape)
primitive_action_t = controller.sample_act(sess, ob_with_g_reshaped, update_eps=update_eps1_with_respect_to_g)[0]
# obtain extrinsic reward from environment
ob_tp1, extrinsic_reward_t, done_t, info = env.step(primitive_action_t)
reached_goal = env.unwrapped.reached_goal(desired_goal)
ob_with_g_tp1 = env.unwrapped._add_goal_mask(ob_tp1['observation'], desired_goal)
intrinsic_reward_t = critic.criticize(desired_goal, reached_goal, primitive_action_t, done_t)
controller_replay_buffer.add(ob_with_g, primitive_action_t, intrinsic_reward_t, ob_with_g_tp1, done_t)
# sample from replay_buffer1 to train controller
obs_with_g_t, primitive_actions_t, intrinsic_rewards_t, obs_with_g_tp1, dones_t = controller_replay_buffer.sample(TRAIN_BATCH_SIZE)
weights, batch_idxes = np.ones_like(intrinsic_rewards_t), None
# get q estimate for tp1 as 'supervised'
ob_with_g_tp1_reshaped = np.reshape(ob_with_g_tp1, (1, )+ob_with_g.shape)
q_tp1 = controller.get_q(sess, ob_with_g_tp1_reshaped)[0]
td_error = controller.train(sess, obs_with_g_t, primitive_actions_t, intrinsic_rewards_t, obs_with_g_tp1, dones_t, weights, q_tp1)
# join train meta-controller only sample from replay_buffer2 to train meta-controller
if total_step >= WARMUP_STEPS:
L.log('join train has started ----- step %d', total_step)
# sample from replay_buffer2 to train meta-controller
init_obs, goals_t, extrinsic_rewards_t, obs_terminate_in_g, dones_t = metacontroller_replay_buffer.sample(TRAIN_BATCH_SIZE)
weights, batch_idxes = np.ones_like(extrinsic_rewards_t), None
# get q estimate for tp1 as 'supervised'
obs_terminate_in_g_reshaped = np.reshape(obs_terminate_in_g, (1, )+obs_terminate_in_g.shape)
q_tp1 = metacontroller.get_q(sess, obs_terminate_in_g_reshaped)[0]
td_error = metacontroller.train(sess, init_obs, goals_t, extrinsic_rewards_t, obs_terminate_in_g, dones_t, weights, q_tp1)
if total_step % UPDATE_TARGET_NETWORK_FREQ == 0:
#L.log('UPDATE BOTH CONTROLLER Q NETWORKS ----- step %d', step)
sess.run(controller.network.update_target_op)
# its fine, we aren't really training meta dqn until after certain steps.
sess.run(metacontroller.network.update_target_op)
extrinsic_rewards += extrinsic_reward_t
ob_with_g = ob_with_g_tp1
done = done_t
total_step += 1
# we are done / reached_goal
# store transitions of init_ob, goal, all the extrinsic rewards, current ob in D2
# print("ep %d : step %d, goal extrinsic total %d" % (ep, step, extrinsic_rewards))
# clean observation without goal encoded
metacontroller_replay_buffer.add(init_ob['observation'], desired_goal, extrinsic_rewards, ob_tp1['observation'], done)
# if we are here then we have finished the desired goal
if not done:
#print("ep %d : goal %d reached, not yet done, extrinsic %d" % (ep, desired_goal, extrinsic_rewards))
exploration_ep = 1.0
total_goal_reached[env.unwrapped.achieved_goal] += 1
if total_step >= WARMUP_STEPS:
t = total_step - WARMUP_STEPS
exploration_ep = exploration2.value(t)
ob_with_g_reshaped = np.reshape(ob_with_g, (1, )+ob_with_g.shape)
while env.unwrapped.achieved_goal == desired_goal:
desired_goal = metacontroller.sample_act(sess, ob_with_g_reshaped, update_eps=exploration_ep)[0]
env.unwrapped.desired_goal = desired_goal
total_goal_sampled[desired_goal] += 1
L.log('ep %d : achieved goal was %d ----- new goal --- %d' % (ep, env.unwrapped.achieved_goal, desired_goal))
# start again
reached_goal = False
# finish an episode
total_extrinsic_reward.append(extrinsic_rewards)
ep += 1
mean_100ep_reward = round(np.mean(total_extrinsic_reward[-101:-1]), 1)
if ep % monitor.print_freq == 0 :
L.record_tabular("steps", total_step)
L.record_tabular("episodes", ep)
L.record_tabular("mean 100 episode reward", mean_100ep_reward)
L.dump_tabular()
if total_step % monitor.ckpt_freq == 0:
if saved_mean_reward is None or mean_100ep_reward > saved_mean_reward:
L.log("Saving model due to mean reward increase: {} -> {}".format(
saved_mean_reward, mean_100ep_reward))
U.save_variables(model_file)
model_saved = True
saved_mean_reward = mean_100ep_reward
# verified our model was saved
if model_saved:
L.log('restored model with mean reward: %d' % saved_mean_reward)
U.load_variables(model_file)
def train(env, agent, args):
monitor = Monitor(train=True, spec="-{}".format(args.method))
monitor.init_log(args.log, "roi_m.{}_e.{}_n.{}".format(args.model, args.env_name, args.name))
env.reset()
S = set()
corWs = queue.Queue()
# add two extreme points
corWs.put(FloatTensor([1.0, 0.0]))
corWs.put(FloatTensor([0.0, 1.0]))
# outer_loop!
for _ in range(args.ws):
print(colored("size of corWs: {}".format(corWs.qsize()), "green"))
if corWs.qsize() == 0:
corWs.put(FloatTensor([1.0, 0.0]))
corWs.put(FloatTensor([0.0, 1.0]))
corner_w = corWs.get_nowait()
while not is_corner(corner_w, S) and corWs.qsize()>0:
corner_w = corWs.get_nowait()
print(colored("{} left....".format(corWs.qsize()), "green"))
if not is_corner(corner_w, S):
print(colored("no more corner w...", "green"))
print(colored("Final S contains", "green"))
for s in S:
print(colored(s, "green"))
break
print(colored("solve for w: {}".format(corner_w), "green"))
for num_eps in range(int(args.episode_num / args.ws)):
terminal = False
env.reset()
loss = 0
cnt = 0
tot_reward = 0
tot_reward_mo = 0
probe = None
if args.env_name == "dst":
probe = corner_w
elif args.env_name in ['ft', 'ft5', 'ft7']:
probe = FloatTensor([0.8, 0.2, 0.0, 0.0, 0.0, 0.0])
while not terminal:
state = env.observe()
action = agent.act(state, corner_w)
agent.w_kept = corner_w
next_state, reward, terminal = env.step(action)
if args.log:
monitor.add_log(state, action, reward, terminal, agent.w_kept)
agent.memorize(state, action, next_state, reward, terminal, roi=True)
loss += agent.learn(corner_w)
if cnt > 100:
terminal = True
agent.reset()
tot_reward = tot_reward + (probe.cpu().numpy().dot(reward)) * np.power(args.gamma, cnt)
tot_reward_mo = tot_reward_mo + reward * np.power(args.gamma, cnt)
cnt = cnt + 1
_, q = agent.predict(probe)
if args.env_name == "dst":
act_1 = q[0, 3]
act_2 = q[0, 1]
elif args.env_name in ['ft', 'ft5', 'ft7']:
act_1 = q[0, 1]
act_2 = q[0, 0]
if args.method == "crl-naive":
act_1 = act_1.data.cpu()
act_2 = act_2.data.cpu()
elif args.method == "crl-envelope":
act_1 = probe.dot(act_1.data)
act_2 = probe.dot(act_2.data)
elif args.method == "crl-energy":
act_1 = probe.dot(act_1.data)
act_2 = probe.dot(act_2.data)
print("end of eps %d with total reward (1) %0.2f (%0.2f, %0.2f), the Q is %0.2f | %0.2f; loss: %0.4f" % (
num_eps,
tot_reward,
tot_reward_mo[0],
tot_reward_mo[1],
act_1,
act_2,
# q__max,
loss / cnt))
monitor.update(num_eps,
tot_reward,
act_1,
act_2,
# q__max,
loss / cnt)
# agent.is_train=False
terminal = False
env.reset()
cnt = 0
tot_reward_mo = 0
while not terminal:
state = env.observe()
action = agent.act(state, corner_w)
agent.w_kept = corner_w
next_state, reward, terminal = env.step(action)
if cnt > 100:
terminal = True
agent.reset()
tot_reward_mo = tot_reward_mo + reward * np.power(args.gamma, cnt)
cnt = cnt + 1
agent.is_train=True
S, corWs = update_ccs(S, corWs, tot_reward_mo)
print(colored("----------------\n", "red"))
print(colored("Current S contains", "red"))
for s in S:
print(colored(s, "red"))
print(colored("----------------\n", "red"))
# if num_eps+1 % 100 == 0:
# agent.save(args.save, args.model+args.name+"_tmp_{}".format(number))
agent.save(args.save, "roi_m.{}_e.{}_n.{}".format(args.model, args.env_name, args.name))
def train(self):
'''
call this function when the episode ends
'''
self.episodecount += 1
if self.monitor is None:
self.monitor = Monitor("-" + self.algorithm)
if not self.is_training:
logger.info("Not in training mode")
return
else:
logger.info("Update naive morl policy parameters.")
logger.info("Episode Num so far: %s" % (self.episodecount))
if len(self.trans_mem) > self.batch_size * 10:
self.update_count += 1
minibatch = self.sample(self.trans_mem, self.priority_mem,
self.batch_size)
batchify = lambda x: list(x) * self.weight_num
state_batch = batchify(map(lambda x: x.s, minibatch))
action_batch = batchify(map(lambda x: LongTensor([x.a]),
minibatch))
reward_batch = batchify(map(lambda x: x.r.unsqueeze(0), minibatch))
next_state_batch = batchify(map(lambda x: x.s_, minibatch))
terminal_batch = batchify(map(lambda x: x.d, minibatch))
mask_batch = batchify(map(lambda x: x.ms.unsqueeze(0), minibatch))
next_mask_batch = batchify(
map(lambda x: x.ms_.unsqueeze(0), minibatch))
w_batch = np.random.randn(self.weight_num, self.model_.reward_size)
w_batch = np.abs(w_batch) / \
np.linalg.norm(w_batch, ord=1, axis=1, keepdims=True)
w_batch = torch.from_numpy(w_batch.repeat(
self.batch_size, axis=0)).type(FloatTensor)
if self.algorithm == 'naive':
__, Q = self.model_(Variable(torch.cat(state_batch, dim=0)),
Variable(w_batch),
Variable(torch.cat(mask_batch, dim=0)))
# detach since we don't want gradients to propagate
# HQ, _ = self.model_(Variable(torch.cat(next_state_batch, dim=0), volatile=True),
# Variable(w_batch, volatile=True))
_, DQ = self.model(
Variable(torch.cat(next_state_batch, dim=0),
requires_grad=False),
Variable(w_batch, requires_grad=False),
Variable(torch.cat(next_mask_batch, dim=0),
requires_grad=False))
_, act = self.model_(
Variable(torch.cat(next_state_batch, dim=0),
requires_grad=False),
Variable(w_batch, requires_grad=False),
Variable(torch.cat(next_mask_batch, dim=0),
requires_grad=False))[1].max(1)
HQ = DQ.gather(1, act.unsqueeze(dim=1)).squeeze()
w_reward_batch = torch.bmm(
w_batch.unsqueeze(1),
torch.cat(reward_batch, dim=0).unsqueeze(2)).squeeze()
nontmlmask = self.nontmlinds(terminal_batch)
with torch.no_grad():
Tau_Q = Variable(
torch.zeros(self.batch_size *
self.weight_num).type(FloatTensor))
Tau_Q[nontmlmask] = self.gamma * HQ[nontmlmask]
Tau_Q += Variable(w_reward_batch)
actions = Variable(torch.cat(action_batch, dim=0))
# Compute Huber loss
loss = F.smooth_l1_loss(Q.gather(1, actions.unsqueeze(dim=1)),
Tau_Q.unsqueeze(dim=1))
elif self.algorithm == 'envelope':
action_size = self.model_.action_size
reward_size = self.model_.reward_size
__, Q = self.model_(Variable(torch.cat(state_batch, dim=0)),
Variable(w_batch),
w_num=self.weight_num,
execmask=Variable(
torch.cat(mask_batch, dim=0)))
# detach since we don't want gradients to propagate
# HQ, _ = self.model_(Variable(torch.cat(next_state_batch, dim=0), volatile=True),
# Variable(w_batch, volatile=True), w_num=self.weight_num)
_, DQ = self.model(Variable(torch.cat(next_state_batch, dim=0),
requires_grad=False),
Variable(w_batch, requires_grad=False),
execmask=Variable(torch.cat(next_mask_batch,
dim=0),
requires_grad=False))
w_ext = w_batch.unsqueeze(2).repeat(1, action_size, 1)
w_ext = w_ext.view(-1, self.model.reward_size)
_, tmpQ = self.model_(Variable(torch.cat(next_state_batch,
dim=0),
requires_grad=False),
Variable(w_batch, requires_grad=False),
execmask=Variable(torch.cat(
next_mask_batch, dim=0),
requires_grad=False))
tmpQ = tmpQ.view(-1, reward_size)
# print(torch.bmm(w_ext.unsqueeze(1),
# tmpQ.data.unsqueeze(2)).view(-1, action_size))
act = torch.bmm(
Variable(w_ext.unsqueeze(1), requires_grad=False),
tmpQ.unsqueeze(2)).view(-1, action_size).max(1)[1]
HQ = DQ.gather(
1,
act.view(-1, 1, 1).expand(DQ.size(0), 1,
DQ.size(2))).squeeze()
nontmlmask = self.nontmlinds(terminal_batch)
with torch.no_grad():
Tau_Q = Variable(
torch.zeros(self.batch_size * self.weight_num,
reward_size).type(FloatTensor))
Tau_Q[nontmlmask] = self.gamma * HQ[nontmlmask]
# Tau_Q.volatile = False
Tau_Q += Variable(torch.cat(reward_batch, dim=0))
actions = Variable(torch.cat(action_batch, dim=0))
Q = Q.gather(
1,
actions.view(-1, 1,
1).expand(Q.size(0), 1,
Q.size(2))).view(-1, reward_size)
Tau_Q = Tau_Q.view(-1, reward_size)
wQ = torch.bmm(Variable(w_batch.unsqueeze(1)),
Q.unsqueeze(2)).squeeze()
wTQ = torch.bmm(Variable(w_batch.unsqueeze(1)),
Tau_Q.unsqueeze(2)).squeeze()
# loss = F.mse_loss(Q.view(-1), Tau_Q.view(-1))
# print self.beta
loss = self.beta * F.mse_loss(wQ.view(-1), wTQ.view(-1))
loss += (1 - self.beta) * F.mse_loss(Q.view(-1),
Tau_Q.view(-1))
self.optimizer.zero_grad()
loss.backward()
for param in self.model_.parameters():
param.grad.data.clamp_(-1, 1)
self.optimizer.step()
if self.update_count % self.update_freq == 0:
self.model.load_state_dict(self.model_.state_dict())
self.monitor.update(self.episodecount, loss=loss.data)
self.savePolicyInc() # self.out_policy_file)
class MORLPolicy(Policy.Policy):
'''Derived from :class:`Policy`
'''
def __init__(self,
in_policy_file,
out_policy_file,
domainString='CamRestaurants',
is_training=False,
action_names=None):
super(MORLPolicy, self).__init__(domainString, is_training)
self.domainString = domainString
self.domainUtil = FlatOnt.FlatDomainOntology(self.domainString)
self.in_policy_file = in_policy_file
self.out_policy_file = out_policy_file
self.is_training = is_training
self.accum_belief = []
self.domainUtil = FlatOnt.FlatDomainOntology(self.domainString)
self.prev_state_check = None
# parameter settings
if 0: # cfg.has_option('morlpolicy', 'n_in'): #ic304: this was giving me a weird error, disabled it until i can check it deeper
self.n_in = cfg.getint('morlpolicy', 'n_in')
else:
self.n_in = self.get_n_in(domainString)
self.n_rew = 1
if cfg.has_option('morlpolicy', 'n_rew'):
self.n_rew = cfg.getint('morlpolicy', 'n_rew')
self.lr = 0.001
if cfg.has_option('morlpolicy', 'learning_rate'):
self.lr = cfg.getfloat('morlpolicy', 'learning_rate')
self.epsilon = 0.5
if cfg.has_option('morlpolicy', 'epsilon'):
self.epsilon = cfg.getfloat('morlpolicy', 'epsilon')
self.epsilon_decay = True
if cfg.has_option('morlpolicy', 'epsilon_decay'):
self.epsilon_decay = cfg.getboolean('morlpolicy', 'epsilon_decay')
self.randomseed = 1234
if cfg.has_option('GENERAL', 'seed'):
self.randomseed = cfg.getint('GENERAL', 'seed')
self.gamma = 1.0
if cfg.has_option('morlpolicy', 'gamma'):
self.gamma = cfg.getfloat('morlpolicy', 'gamma')
self.weight_num = 32
if cfg.has_option('morlpolicy', 'weight_num'):
self.weight_num = cfg.getint('morlpolicy', 'weight_num')
self.episode_num = 1000
if cfg.has_option('morlpolicy', 'episode_num'):
self.episode_num = cfg.getfloat('morlpolicy', 'episode_num')
self.optimizer = "Adam"
if cfg.has_option('morlpolicy', 'optimizer'):
self.optimizer = cfg.get('morlpolicy', 'optimizer')
self.save_step = 100
if cfg.has_option('policy', 'save_step'):
self.save_step = cfg.getint('policy', 'save_step')
self.update_freq = 50
if cfg.has_option('morlpolicy', 'update_freq'):
self.update_freq = cfg.getint('morlpolicy', 'update_freq')
self.policyfeatures = []
if cfg.has_option('morlpolicy', 'features'):
logger.info('Features: ' + str(cfg.get('morlpolicy', 'features')))
self.policyfeatures = json.loads(cfg.get('morlpolicy', 'features'))
self.algorithm = 'naive'
if cfg.has_option('morlpolicy', 'algorithm'):
self.algorithm = cfg.get('morlpolicy', 'algorithm')
logger.info('Learning algorithm: ' + self.algorithm)
self.batch_size = 32
if cfg.has_option('morlpolicy', 'batch_size'):
self.batch_size = cfg.getint('morlpolicy', 'batch_size')
self.mem_size = 1000
if cfg.has_option('morlpolicy', 'mem_size'):
self.mem_size = cfg.getint('morlpolicy', 'mem_size')
self.training_freq = 1
if cfg.has_option('morlpolicy', 'training_freq'):
self.training_freq = cfg.getint('morlpolicy', 'training_freq')
# set beta for envelope algorithm
self.beta = 0.1
if cfg.has_option('morlpolicy', 'beta'):
self.beta = cfg.getfloat('morlpolicy', 'beta')
self.beta_init = self.beta
self.beta_uplim = 1.00
self.tau = 1000.
self.beta_expbase = float(
np.power(self.tau * (self.beta_uplim - self.beta),
1. / (self.episode_num + 1)))
self.beta_delta = self.beta_expbase / self.tau
self.beta -= self.beta_delta
# using homotopy method for optimization
self.homotopy = False
if cfg.has_option('morlpolicy', 'homotopy'):
self.homotopy = cfg.getboolean('morlpolicy', 'homotopy')
self.epsilon_delta = (self.epsilon - 0.05) / self.episode_num
self.episodecount = 0
# construct the models
self.state_dim = self.n_in
self.summaryaction = SummaryAction.SummaryAction(domainString)
if action_names is None:
self.action_names = self.summaryaction.action_names
else:
self.action_names = action_names
self.action_dim = len(self.action_names)
self.stats = [0 for _ in range(self.action_dim)]
self.reward_dim = self.n_rew
model = None
if self.algorithm == 'naive':
model = naive.NaiveLinearCQN(self.state_dim, self.action_dim,
self.reward_dim)
elif self.algorithm == 'envelope':
model = envelope.EnvelopeLinearCQN(self.state_dim, self.action_dim,
self.reward_dim)
self.model_ = model
self.model = copy.deepcopy(model)
# initialize memory
self.trans_mem = deque()
self.trans = namedtuple('trans',
['s', 'a', 's_', 'r', 'd', 'ms', 'ms_'])
self.priority_mem = deque()
self.mem_last_state = None
self.mem_last_action = None
self.mem_last_mask = None
self.mem_cur_state = None
self.mem_cur_action = None
self.mem_cur_mask = None
if self.optimizer == 'Adam':
self.optimizer = optim.Adam(self.model_.parameters(), lr=self.lr)
elif self.optimizer == 'RMSprop':
self.optimizer = optim.RMSprop(self.model_.parameters(),
lr=self.lr)
try:
self.loadPolicy(self.in_policy_file)
except:
logger.info("No previous model found...")
self.w_kept = None
self.update_count = 0
if self.is_training:
self.model_.train()
if use_cuda:
self.model.cuda()
self.model_.cuda()
self.monitor = None
def get_n_in(self, domain_string):
if domain_string == 'CamRestaurants':
return 268
elif domain_string == 'CamHotels':
return 111
elif domain_string == 'SFRestaurants':
return 636
elif domain_string == 'SFHotels':
return 438
elif domain_string == 'Laptops6':
return 268 # ic340: this is wrong
elif domain_string == 'Laptops11':
return 257
elif domain_string is 'TV':
return 188
else:
print 'DOMAIN {} SIZE NOT SPECIFIED, PLEASE DEFINE n_in'.format(
domain_string)
def act_on(self, state, preference=None):
if self.lastSystemAction is None and self.startwithhello:
systemAct, nextaIdex = 'hello()', -1
else:
systemAct, nextaIdex = self.nextAction(state, preference)
self.lastSystemAction = systemAct
self.summaryAct = nextaIdex
self.prevbelief = state
systemAct = DiaAct.DiaAct(systemAct)
return systemAct
def record(self,
reward,
domainInControl=None,
weight=None,
state=None,
action=None):
if domainInControl is None:
domainInControl = self.domainString
if self.actToBeRecorded is None:
self.actToBeRecorded = self.summaryAct
if state is None:
state = self.prevbelief
if action is None:
action = self.actToBeRecorded
cState, cAction = self.convertStateAction(state, action)
execMask = self.summaryaction.getExecutableMask(state, cAction)
execMask = torch.Tensor(execMask).type(FloatTensor)
# # normalising total return to -1~1
# reward /= 20.0
self.mem_last_state = self.mem_cur_state
self.mem_last_action = self.mem_cur_action
self.mem_last_mask = self.mem_cur_mask
self.mem_cur_state = np.vstack(
[np.expand_dims(x, 0) for x in [cState]])
# self.mem_cur_action = np.eye(self.action_dim, self.action_dim)[[cAction]]
self.mem_cur_action = cAction
self.mem_cur_mask = execMask
state = self.mem_last_state
action = self.mem_last_action
next_state = self.mem_cur_state
terminal = False
if state is not None and action is not None:
self.trans_mem.append(
self.trans(
torch.from_numpy(state).type(FloatTensor), # state
action, # action
torch.from_numpy(next_state).type(
FloatTensor), # next state
torch.from_numpy(reward).type(FloatTensor), # reward
terminal, # terminal
self.mem_last_mask, # action mask
self.mem_cur_mask)) # next action mask
# randomly produce a preference for calculating priority
# preference = self.w_kept
preference = torch.randn(self.model_.reward_size)
preference = (torch.abs(preference) /
torch.norm(preference, p=1)).type(FloatTensor)
state = torch.from_numpy(state).type(FloatTensor)
_, q = self.model_(Variable(state, requires_grad=False),
Variable(preference.unsqueeze(0),
requires_grad=False),
execmask=Variable(
self.mem_last_mask.unsqueeze(0),
requires_grad=False))
q = q[0, action].data
if self.algorithm == 'naive':
wr = preference.dot(torch.from_numpy(reward).type(FloatTensor))
if not terminal:
next_state = torch.from_numpy(next_state).type(FloatTensor)
hq, _ = self.model_(Variable(next_state,
requires_grad=False),
Variable(preference.unsqueeze(0),
requires_grad=False),
execmask=Variable(
self.mem_cur_mask.unsqueeze(0),
requires_grad=False))
hq = hq.data[0]
p = abs(wr + self.gamma * hq - q)
else:
self.w_kept = None
# if self.epsilon_decay:
# self.epsilon -= self.epsilon_delta
p = abs(wr - q)
elif self.algorithm == 'envelope':
wq = preference.dot(q)
wr = preference.dot(torch.from_numpy(reward).type(FloatTensor))
if not terminal:
next_state = torch.from_numpy(next_state).type(FloatTensor)
hq, _ = self.model_(Variable(next_state,
requires_grad=False),
Variable(preference.unsqueeze(0),
requires_grad=False),
execmask=Variable(
self.mem_cur_mask.unsqueeze(0),
requires_grad=False))
hq = hq.data[0]
whq = preference.dot(hq)
p = abs(wr + self.gamma * whq - wq)
else:
self.w_kept = None
# if self.epsilon_decay:
# self.epsilon -= self.epsilon_delta
# if self.homotopy:
# self.beta += self.beta_delta
# self.beta_delta = (self.beta - self.beta_init) * self.beta_expbase + self.beta_init - self.beta
p = abs(wr - wq)
p += 1e-5
self.priority_mem.append(p)
if len(self.trans_mem) > self.mem_size:
self.trans_mem.popleft()
self.priority_mem.popleft()
self.actToBeRecorded = None
def finalizeRecord(self, reward, domainInControl=None):
if domainInControl is None:
domainInControl = self.domainString
if self.episodes[domainInControl] is None:
logger.warning(
"record attempted to be finalized for domain where nothing has been recorded before"
)
return
# # normalising total return to -1~1
# reward /= 20.0
terminal_state, terminal_action = self.convertStateAction(
TerminalState(), TerminalAction())
# # normalising total return to -1~1
# reward /= 20.0
self.mem_last_state = self.mem_cur_state
self.mem_last_action = self.mem_cur_action
self.mem_last_mask = self.mem_cur_mask
self.mem_cur_state = np.vstack(
[np.expand_dims(x, 0) for x in [terminal_state]])
self.mem_cur_action = None
self.mem_cur_mask = torch.zeros(self.action_dim).type(FloatTensor)
state = self.mem_last_state
action = self.mem_last_action
next_state = self.mem_cur_state
terminal = True
if state is not None:
self.trans_mem.append(
self.trans(
torch.from_numpy(state).type(FloatTensor), # state
action, # action
torch.from_numpy(next_state).type(
FloatTensor), # next state
torch.from_numpy(reward).type(FloatTensor), # reward
terminal, # terminal
self.mem_last_mask, # action mask
self.mem_cur_mask)) # next action mask
# randomly produce a preference for calculating priority
# preference = self.w_kept
preference = torch.randn(self.model_.reward_size)
preference = (torch.abs(preference) /
torch.norm(preference, p=1)).type(FloatTensor)
state = torch.from_numpy(state).type(FloatTensor)
_, q = self.model_(
Variable(state, requires_grad=False),
Variable(preference.unsqueeze(0), requires_grad=False))
q = q.data[0, action]
if self.algorithm == 'naive':
wr = preference.dot(torch.from_numpy(reward).type(FloatTensor))
if not terminal:
next_state = torch.from_numpy(next_state).type(FloatTensor)
hq, _ = self.model_(
Variable(next_state, requires_grad=False),
Variable(preference.unsqueeze(0), requires_grad=False))
hq = hq.data[0]
p = abs(wr + self.gamma * hq - q)
else:
self.w_kept = None
# if self.epsilon_decay:
# self.epsilon -= self.epsilon_delta
p = abs(wr - q)
elif self.algorithm == 'envelope':
wq = preference.dot(q)
wr = preference.dot(torch.from_numpy(reward).type(FloatTensor))
if not terminal:
next_state = torch.from_numpy(next_state).type(FloatTensor)
hq, _ = self.model_(
Variable(next_state, requires_grad=False),
Variable(preference.unsqueeze(0), requires_grad=False))
hq = hq.data[0]
whq = preference.dot(hq)
p = abs(wr + self.gamma * whq - wq)
else:
self.w_kept = None
# if self.epsilon_decay:
# self.epsilon -= self.epsilon_delta
# if self.homotopy:
# self.beta += self.beta_delta
# self.beta_delta = (self.beta - self.beta_init) * self.beta_expbase + self.beta_init - self.beta
p = abs(wr - wq)
p += 1e-5
self.priority_mem.append(p)
if len(self.trans_mem) > self.mem_size:
self.trans_mem.popleft()
self.priority_mem.popleft()
def convertStateAction(self, state, action):
'''
nnType = 'dnn'
#nnType = 'rnn'
# expand one dimension to match the batch size of 1 at axis 0
if nnType == 'rnn':
belief = np.expand_dims(belief,axis=0)
'''
if isinstance(state, TerminalState):
if self.domainUtil.domainString == 'CamRestaurants':
return [0] * 268, action
elif self.domainUtil.domainString == 'CamHotels':
return [0] * 111, action
elif self.domainUtil.domainString == 'SFRestaurants':
return [0] * 633, action
elif self.domainUtil.domainString == 'SFHotels':
return [0] * 438, action
elif self.domainUtil.domainString == 'Laptops11':
return [0] * 257, action
elif self.domainUtil.domainString == 'TV':
return [0] * 188, action
else:
flat_belief = flatten_belief(state, self.domainUtil)
self.prev_state_check = flat_belief
return flat_belief, action
def convertDIPStateAction(self, state, action):
'''
'''
if isinstance(state, TerminalState):
return [0] * 89, action
else:
dip_state = DIP_state(state.domainStates[state.currentdomain],
self.domainString)
action_name = self.actions.action_names[action]
act_slot = 'general'
for slot in dip_state.slots:
if slot in action_name:
act_slot = slot
flat_belief = dip_state.get_beliefStateVec(act_slot)
self.prev_state_check = flat_belief
return flat_belief, action
def nextAction(self, beliefstate, preference=None):
'''
select next action
:param beliefstate:
:param preference:
:returns: (int) next summary action
'''
beliefVec = flatten_belief(beliefstate, self.domainUtil)
execMask = self.summaryaction.getExecutableMask(
beliefstate, self.lastSystemAction)
execMask = torch.Tensor(execMask).type(FloatTensor)
if preference is None:
if self.w_kept is None:
self.w_kept = torch.randn(self.model_.reward_size)
self.w_kept = (torch.abs(self.w_kept) /
torch.norm(self.w_kept, p=1)).type(FloatTensor)
preference = self.w_kept
if self.is_training and (len(self.trans_mem) < self.batch_size * 10
or torch.rand(1)[0] < self.epsilon):
admissible = [i for i, x in enumerate(execMask) if x == 0.0]
random.shuffle(admissible)
nextaIdex = admissible[0]
else:
state = np.reshape(beliefVec, (1, len(beliefVec)))
state = torch.from_numpy(state).type(FloatTensor)
if self.algorithm == 'naive':
_, Q = self.model_(
Variable(state, requires_grad=False),
Variable(preference.unsqueeze(0), requires_grad=False),
Variable(execMask.unsqueeze(0), requires_grad=False))
nextaIdex = np.argmax(Q.detach().cpu().numpy())
elif self.algorithm == 'envelope':
_, Q = self.model_(Variable(state, requires_grad=False),
Variable(preference.unsqueeze(0),
requires_grad=False),
execmask=Variable(execMask.unsqueeze(0),
requires_grad=False))
Q = Q.view(-1, self.model_.reward_size)
Q = torch.mv(Q.data, preference)
action = Q.max(0)[1].cpu().numpy()
nextaIdex = int(action)
self.stats[nextaIdex] += 1
summaryAct = self.action_names[nextaIdex]
beliefstate = beliefstate.getDomainState(self.domainUtil.domainString)
masterAct = self.summaryaction.Convert(beliefstate, summaryAct,
self.lastSystemAction)
return masterAct, nextaIdex
def sample(self, pop, pri, k):
pri = np.array(pri).astype(np.float)
inds = np.random.choice(range(len(pop)),
k,
replace=False,
p=pri / pri.sum())
return [pop[i] for i in inds]
def actmsk(self, num_dim, index):
mask = ByteTensor(num_dim).zero_()
mask[index] = 1
return mask.unsqueeze(0)
def nontmlinds(self, terminal_batch):
mask = ByteTensor(terminal_batch)
inds = torch.arange(0, len(terminal_batch)).type(LongTensor)
inds = inds[mask.eq(0)]
return inds
def train(self):
'''
call this function when the episode ends
'''
self.episodecount += 1
if self.monitor is None:
self.monitor = Monitor("-" + self.algorithm)
if not self.is_training:
logger.info("Not in training mode")
return
else:
logger.info("Update naive morl policy parameters.")
logger.info("Episode Num so far: %s" % (self.episodecount))
if len(self.trans_mem) > self.batch_size * 10:
self.update_count += 1
minibatch = self.sample(self.trans_mem, self.priority_mem,
self.batch_size)
batchify = lambda x: list(x) * self.weight_num
state_batch = batchify(map(lambda x: x.s, minibatch))
action_batch = batchify(map(lambda x: LongTensor([x.a]),
minibatch))
reward_batch = batchify(map(lambda x: x.r.unsqueeze(0), minibatch))
next_state_batch = batchify(map(lambda x: x.s_, minibatch))
terminal_batch = batchify(map(lambda x: x.d, minibatch))
mask_batch = batchify(map(lambda x: x.ms.unsqueeze(0), minibatch))
next_mask_batch = batchify(
map(lambda x: x.ms_.unsqueeze(0), minibatch))
w_batch = np.random.randn(self.weight_num, self.model_.reward_size)
w_batch = np.abs(w_batch) / \
np.linalg.norm(w_batch, ord=1, axis=1, keepdims=True)
w_batch = torch.from_numpy(w_batch.repeat(
self.batch_size, axis=0)).type(FloatTensor)
if self.algorithm == 'naive':
__, Q = self.model_(Variable(torch.cat(state_batch, dim=0)),
Variable(w_batch),
Variable(torch.cat(mask_batch, dim=0)))
# detach since we don't want gradients to propagate
# HQ, _ = self.model_(Variable(torch.cat(next_state_batch, dim=0), volatile=True),
# Variable(w_batch, volatile=True))
_, DQ = self.model(
Variable(torch.cat(next_state_batch, dim=0),
requires_grad=False),
Variable(w_batch, requires_grad=False),
Variable(torch.cat(next_mask_batch, dim=0),
requires_grad=False))
_, act = self.model_(
Variable(torch.cat(next_state_batch, dim=0),
requires_grad=False),
Variable(w_batch, requires_grad=False),
Variable(torch.cat(next_mask_batch, dim=0),
requires_grad=False))[1].max(1)
HQ = DQ.gather(1, act.unsqueeze(dim=1)).squeeze()
w_reward_batch = torch.bmm(
w_batch.unsqueeze(1),
torch.cat(reward_batch, dim=0).unsqueeze(2)).squeeze()
nontmlmask = self.nontmlinds(terminal_batch)
with torch.no_grad():
Tau_Q = Variable(
torch.zeros(self.batch_size *
self.weight_num).type(FloatTensor))
Tau_Q[nontmlmask] = self.gamma * HQ[nontmlmask]
Tau_Q += Variable(w_reward_batch)
actions = Variable(torch.cat(action_batch, dim=0))
# Compute Huber loss
loss = F.smooth_l1_loss(Q.gather(1, actions.unsqueeze(dim=1)),
Tau_Q.unsqueeze(dim=1))
elif self.algorithm == 'envelope':
action_size = self.model_.action_size
reward_size = self.model_.reward_size
__, Q = self.model_(Variable(torch.cat(state_batch, dim=0)),
Variable(w_batch),
w_num=self.weight_num,
execmask=Variable(
torch.cat(mask_batch, dim=0)))
# detach since we don't want gradients to propagate
# HQ, _ = self.model_(Variable(torch.cat(next_state_batch, dim=0), volatile=True),
# Variable(w_batch, volatile=True), w_num=self.weight_num)
_, DQ = self.model(Variable(torch.cat(next_state_batch, dim=0),
requires_grad=False),
Variable(w_batch, requires_grad=False),
execmask=Variable(torch.cat(next_mask_batch,
dim=0),
requires_grad=False))
w_ext = w_batch.unsqueeze(2).repeat(1, action_size, 1)
w_ext = w_ext.view(-1, self.model.reward_size)
_, tmpQ = self.model_(Variable(torch.cat(next_state_batch,
dim=0),
requires_grad=False),
Variable(w_batch, requires_grad=False),
execmask=Variable(torch.cat(
next_mask_batch, dim=0),
requires_grad=False))
tmpQ = tmpQ.view(-1, reward_size)
# print(torch.bmm(w_ext.unsqueeze(1),
# tmpQ.data.unsqueeze(2)).view(-1, action_size))
act = torch.bmm(
Variable(w_ext.unsqueeze(1), requires_grad=False),
tmpQ.unsqueeze(2)).view(-1, action_size).max(1)[1]
HQ = DQ.gather(
1,
act.view(-1, 1, 1).expand(DQ.size(0), 1,
DQ.size(2))).squeeze()
nontmlmask = self.nontmlinds(terminal_batch)
with torch.no_grad():
Tau_Q = Variable(
torch.zeros(self.batch_size * self.weight_num,
reward_size).type(FloatTensor))
Tau_Q[nontmlmask] = self.gamma * HQ[nontmlmask]
# Tau_Q.volatile = False
Tau_Q += Variable(torch.cat(reward_batch, dim=0))
actions = Variable(torch.cat(action_batch, dim=0))
Q = Q.gather(
1,
actions.view(-1, 1,
1).expand(Q.size(0), 1,
Q.size(2))).view(-1, reward_size)
Tau_Q = Tau_Q.view(-1, reward_size)
wQ = torch.bmm(Variable(w_batch.unsqueeze(1)),
Q.unsqueeze(2)).squeeze()
wTQ = torch.bmm(Variable(w_batch.unsqueeze(1)),
Tau_Q.unsqueeze(2)).squeeze()
# loss = F.mse_loss(Q.view(-1), Tau_Q.view(-1))
# print self.beta
loss = self.beta * F.mse_loss(wQ.view(-1), wTQ.view(-1))
loss += (1 - self.beta) * F.mse_loss(Q.view(-1),
Tau_Q.view(-1))
self.optimizer.zero_grad()
loss.backward()
for param in self.model_.parameters():
param.grad.data.clamp_(-1, 1)
self.optimizer.step()
if self.update_count % self.update_freq == 0:
self.model.load_state_dict(self.model_.state_dict())
self.monitor.update(self.episodecount, loss=loss.data)
self.savePolicyInc() # self.out_policy_file)
def savePolicy(self, FORCE_SAVE=False):
"""
Does not use this, cause it will be called from agent after every episode.
we want to save the policy only periodically.
"""
pass
def savePolicyInc(self, FORCE_SAVE=False):
"""
save model and replay buffer
"""
if self.episodecount % self.save_step == 0:
torch.save(
self.model, "{}.{}.pkl".format(self.out_policy_file,
self.algorithm))
def loadPolicy(self, filename):
"""
load model and replay buffer
"""
# load models
self.model_ = torch.load("{}.{}.pkl".format(filename, self.algorithm))
self.model = copy.deepcopy(self.model_)
def restart(self):
self.summaryAct = None
self.lastSystemAction = None
self.prevbelief = None
self.actToBeRecorded = None
self.w_kept = None
if self.epsilon_decay:
self.epsilon -= self.epsilon_delta
if self.homotopy:
self.beta += self.beta_delta
self.beta_delta = (
self.beta - self.beta_init
) * self.beta_expbase + self.beta_init - self.beta
def fit(self,
x,
y_true,
x_test,
y_test,
loss,
epochs,
batch_size,
learning_rate=1e-3,
momentum=0.9,
weight_decay=0.0002,
zeta=0.3,
dropoutrate=0.,
testing=True,
save_filename="",
monitor=False):
"""
:param x: (array) Containing parameters
:param y_true: (array) Containing one hot encoded labels.
:return (array) A 2D array of metrics (epochs, 3).
"""
if not x.shape[0] == y_true.shape[0]:
raise ValueError("Length of x and y arrays don't match")
self.monitor = Monitor(
save_filename=save_filename) if monitor else None
# Initiate the loss object with the final activation function
self.loss = loss()
self.learning_rate = learning_rate
self.momentum = momentum
self.weight_decay = weight_decay
self.zeta = zeta
self.dropout_rate = dropoutrate
self.save_filename = save_filename
self.input_layer_connections.append(self.get_core_input_connections())
np.savez_compressed(self.save_filename + "_input_connections.npz",
inputLayerConnections=self.input_layer_connections)
maximum_accuracy = 0
metrics = np.zeros((epochs, 4))
for i in range(epochs):
# Shuffle the data
seed = np.arange(x.shape[0])
np.random.shuffle(seed)
x_ = x[seed]
y_ = y_true[seed]
if self.monitor:
self.monitor.start_monitor()
# training
t1 = datetime.datetime.now()
for j in range(x.shape[0] // batch_size):
k = j * batch_size
l = (j + 1) * batch_size
z, a, masks = self._feed_forward(x_[k:l], True)
self._back_prop(z, a, masks, y_[k:l])
t2 = datetime.datetime.now()
if self.monitor:
self.monitor.stop_monitor()
print("\nSET-MLP Epoch ", i)
print("Training time: ", t2 - t1)
# test model performance on the test data at each epoch
# this part is useful to understand model performance and can be commented for production settings
if testing:
t3 = datetime.datetime.now()
accuracy_test, activations_test = self.predict(x_test, y_test)
accuracy_train, activations_train = self.predict(x, y_true)
t4 = datetime.datetime.now()
maximum_accuracy = max(maximum_accuracy, accuracy_test)
loss_test = self.loss.loss(y_test, activations_test)
loss_train = self.loss.loss(y_true, activations_train)
metrics[i, 0] = loss_train
metrics[i, 1] = loss_test
metrics[i, 2] = accuracy_train
metrics[i, 3] = accuracy_test
print(f"Testing time: {t4 - t3}\n; Loss test: {loss_test}; \n"
f"Accuracy test: {accuracy_test}; \n"
f"Maximum accuracy val: {maximum_accuracy}")
t5 = datetime.datetime.now()
if i < epochs - 1: # do not change connectivity pattern after the last epoch
# self.weights_evolution_I() # this implementation is more didactic, but slow.
self.weights_evolution_II(
) # this implementation has the same behaviour as the one above, but it is much faster.
t6 = datetime.datetime.now()
print("Weights evolution time ", t6 - t5)
# save performance metrics values in a file
if self.save_filename != "":
np.savetxt(self.save_filename + ".txt", metrics)
if self.save_filename != "" and self.monitor:
with open(self.save_filename + "_monitor.json", 'w') as file:
file.write(
json.dumps(self.monitor.get_stats(),
indent=4,
sort_keys=True,
default=str))
return metrics
def main(args):
# process config
c = Configs(args.config)
ROOT = os.environ['TENSOROFLOW']
model_directory = '%s/examples/model/multi_layer_nmt' % ROOT
model_path = '%s/model' % model_directory
dictionary_path = {
'source': '%s/source_dictionary.pickle' % model_directory,
'source_reverse':
'%s/source_reverse_dictionary.pickle' % model_directory,
'target': '%s/target_dictionary.pickle' % model_directory,
'target_reverse':
'%s/target_reverse_dictionary.pickle' % model_directory
}
PAD = c.const['PAD']
EOS = c.const['EOS']
train_step = c.option['train_step']
max_time = c.option['max_time']
batch_size = c.option['batch_size']
vocabulary_size = c.option['vocabulary_size']
input_embedding_size = c.option['embedding_size']
hidden_units = c.option['hidden_units']
layers = c.option['layers']
source_train_data_path = c.data['source_train_data']
target_train_data_path = c.data['target_train_data']
source_valid_data_path = c.data['source_valid_data']
target_valid_data_path = c.data['target_valid_data']
source_test_data_path = c.data['source_test_data']
target_test_data_path = c.data['target_test_data']
# read data
if args.mode == 'train':
source_dictionary, source_reverse_dictionary = build_dictionary(
read_words(source_train_data_path), vocabulary_size)
source_train_datas = [
sentence_to_onehot(lines, source_dictionary)
for lines in read_data(source_train_data_path)
]
target_dictionary, target_reverse_dictionary = build_dictionary(
read_words(target_train_data_path), vocabulary_size)
target_train_datas = [
sentence_to_onehot(lines, target_dictionary)
for lines in read_data(target_train_data_path)
]
source_valid_datas = [
sentence_to_onehot(lines, source_dictionary)
for lines in read_data(source_valid_data_path)
]
target_valid_datas = [
sentence_to_onehot(lines, target_dictionary)
for lines in read_data(target_valid_data_path)
]
if args.debug:
source_train_datas = source_train_datas[:1000]
target_train_datas = source_train_datas[:1000]
else:
with open(dictionary_path['source'], 'rb') as f1, \
open(dictionary_path['source_reverse'], 'rb') as f2, \
open(dictionary_path['target'], 'rb') as f3, \
open(dictionary_path['target_reverse'], 'rb') as f4:
source_dictionary = pickle.load(f1)
source_reverse_dictionary = pickle.load(f2)
target_dictionary = pickle.load(f3)
target_reverse_dictionary = pickle.load(f4)
source_test_datas = [
sentence_to_onehot(lines, source_dictionary)
for lines in read_data(source_test_data_path)
]
target_test_datas = [
sentence_to_onehot(lines, target_dictionary)
for lines in read_data(target_test_data_path)
]
# placeholder
encoder_inputs = tf.placeholder(shape=(None, None),
dtype=tf.int32,
name='encoder_inputs')
decoder_inputs = tf.placeholder(shape=(None, None),
dtype=tf.int32,
name='decoder_inputs')
decoder_labels = tf.placeholder(shape=(None, None),
dtype=tf.int32,
name='decoder_labels')
# embed
embeddings = tf.Variable(tf.random_uniform(
[vocabulary_size, input_embedding_size], -1.0, 1.0),
dtype=tf.float32,
name='embeddings')
encoder_inputs_embedded = tf.nn.embedding_lookup(embeddings,
encoder_inputs)
decoder_inputs_embedded = tf.nn.embedding_lookup(embeddings,
decoder_inputs)
# encoder
encoder_units = hidden_units
encoder_layers = [
tf.contrib.rnn.LSTMCell(size) for size in [encoder_units] * layers
]
encoder_cell = tf.contrib.rnn.MultiRNNCell(encoder_layers)
encoder_output, encoder_final_state = tf.nn.dynamic_rnn(
encoder_cell,
encoder_inputs_embedded,
dtype=tf.float32,
time_major=True)
del encoder_output
# decoder
decoder_units = encoder_units
decoder_layers = [
tf.contrib.rnn.LSTMCell(size) for size in [decoder_units] * layers
]
decoder_cell = tf.contrib.rnn.MultiRNNCell(decoder_layers)
decoder_output, decoder_final_state = tf.nn.dynamic_rnn(
decoder_cell,
decoder_inputs_embedded,
initial_state=encoder_final_state,
scope="plain_decoder",
dtype=tf.float32,
time_major=True)
decoder_logits = tf.contrib.layers.linear(decoder_output, vocabulary_size)
decoder_prediction = tf.argmax(
decoder_logits, 2) # max_time: axis=0, batch: axis=1, vocab: axis=2
# optimizer
stepwise_cross_entropy = tf.nn.softmax_cross_entropy_with_logits(
labels=tf.one_hot(decoder_labels,
depth=vocabulary_size,
dtype=tf.float32),
logits=decoder_logits,
)
loss = tf.reduce_mean(stepwise_cross_entropy)
train_op = tf.train.AdamOptimizer().minimize(loss)
saver = tf.train.Saver()
minibatch_idx = {'train': 0, 'valid': 0, 'test': 0}
with tf.Session() as sess:
if args.mode == 'train':
# train
global_max_step = train_step * (
len(source_train_datas) // batch_size + 1)
loss_freq = global_max_step // 100 if global_max_step > 100 else 1
loss_log = []
batch_loss_log = []
loss_suffix = ''
es = EarlyStopper(max_size=5, edge_threshold=0.1)
m = Monitor(global_max_step)
sess.run(tf.global_variables_initializer())
global_step = 0
stop_flag = False
for batch in range(train_step):
if stop_flag:
break
current_batch_loss_log = []
while True: # minibatch process
m.monitor(global_step, loss_suffix)
source_train_batch, _ = batchnize(source_train_datas,
batch_size,
minibatch_idx['train'])
target_train_batch, minibatch_idx['train'] = batchnize(
target_train_datas, batch_size, minibatch_idx['train'])
batch_data = seq2seq(source_train_batch,
target_train_batch, max_time,
vocabulary_size)
feed_dict = {
encoder_inputs: batch_data['encoder_inputs'],
decoder_inputs: batch_data['decoder_inputs'],
decoder_labels: batch_data['decoder_labels']
}
sess.run(fetches=[train_op, loss], feed_dict=feed_dict)
if global_step % loss_freq == 0:
source_valid_batch, _ = batchnize(
source_valid_datas, batch_size,
minibatch_idx['valid'])
target_valid_batch, minibatch_idx['valid'] = batchnize(
target_valid_datas, batch_size,
minibatch_idx['valid'])
batch_data = seq2seq(source_valid_batch,
target_valid_batch, max_time,
vocabulary_size)
feed_dict = {
encoder_inputs: batch_data['encoder_inputs'],
decoder_inputs: batch_data['decoder_inputs'],
decoder_labels: batch_data['decoder_labels']
}
loss_val = sess.run(fetches=loss, feed_dict=feed_dict)
loss_log.append(loss_val)
current_batch_loss_log.append(loss_val)
loss_suffix = 'loss: %f' % loss_val
es_status = es(loss_val)
if batch > train_step // 2 and es_status:
print('early stopping at step: %d' % global_step)
stop_flag = True
break
global_step += 1
if minibatch_idx['train'] == 0:
batch_loss = np.mean(current_batch_loss_log)
batch_loss_log.append(batch_loss)
print('Batch: {}/{}, batch loss: {}'.format(
batch + 1, train_step, batch_loss))
break
# save tf.graph and variables
saver.save(sess, model_path)
print('save at %s' % model_path)
# save plot of loss
plt.plot(np.arange(len(loss_log)) * loss_freq, loss_log)
plt.savefig('%s_global_loss.png' % model_path)
plt.figure()
plt.plot(np.arange(len(batch_loss_log)), batch_loss_log)
plt.savefig('%s_batch_loss.png' % model_path)
# save dictionary
with open(dictionary_path['source'], 'wb') as f1, \
open(dictionary_path['source_reverse'], 'wb') as f2, \
open(dictionary_path['target'], 'wb') as f3, \
open(dictionary_path['target_reverse'], 'wb') as f4:
pickle.dump(source_dictionary, f1)
pickle.dump(source_reverse_dictionary, f2)
pickle.dump(target_dictionary, f3)
pickle.dump(target_reverse_dictionary, f4)
elif args.mode == 'eval':
saver.restore(sess, model_path)
print('load from %s' % model_path)
else:
raise # args.mode should be train or eval
# evaluate
loss_val = []
input_vectors = None
predict_vectors = None
for i in range(len(source_test_datas) // batch_size + 1):
source_test_batch, _ = batchnize(source_test_datas, batch_size,
minibatch_idx['test'])
target_test_batch, minibatch_idx['test'] = batchnize(
target_test_datas, batch_size, minibatch_idx['test'])
batch_data = seq2seq(source_test_batch, target_test_batch,
max_time, vocabulary_size)
feed_dict = {
encoder_inputs: batch_data['encoder_inputs'],
decoder_inputs: batch_data['decoder_inputs'],
decoder_labels: batch_data['decoder_labels']
}
pred = sess.run(fetches=decoder_prediction, feed_dict=feed_dict)
if predict_vectors is None:
predict_vectors = pred.T
else:
predict_vectors = np.vstack((predict_vectors, pred.T))
input_ = batch_data['encoder_inputs']
if input_vectors is None:
input_vectors = input_.T
else:
input_vectors = np.vstack((input_vectors, input_.T))
loss_val.append(sess.run(fetches=loss, feed_dict=feed_dict))
input_sentences = ''
predict_sentences = ''
for i, (input_vector, predict_vector) in enumerate(
zip(input_vectors[:len(source_test_datas)],
predict_vectors[:len(target_test_datas)])):
input_sentences += ' '.join([
source_reverse_dictionary[vector] for vector in input_vector
if not vector == PAD
])
predict_sentences += ' '.join([
target_reverse_dictionary[vector] for vector in predict_vector
if not vector == PAD
])
if i < len(source_test_datas) - 1:
input_sentences += '\n'
predict_sentences += '\n'
evaluate_input_path = '%s.evaluate_input' % model_path
evaluate_predict_path = '%s.evaluate_predict' % model_path
with open(evaluate_input_path, 'w') as f1, \
open(evaluate_predict_path, 'w') as f2:
f1.write(input_sentences)
f2.write(predict_sentences)
print('input sequences at {}'.format(evaluate_input_path))
print('predict sequences at {}'.format(evaluate_predict_path))
print('mean of loss: %f' % np.mean(loss_val))
print('finish.')
def main(args):
# process config
c = Configs(args.config)
ROOT = os.environ['TENSOROFLOW']
model_path = '%s/examples/model/basic_nmt/model' % ROOT
PAD = c.const['PAD']
EOS = c.const['EOS']
train_step = c.option['train_step']
max_time = c.option['max_time']
batch_size = c.option['batch_size']
vocabulary_size = c.option['vocabulary_size']
input_embedding_size = c.option['embedding_size']
hidden_units = c.option['hidden_units']
source_train_data_path = c.data['source_train_data']
target_train_data_path = c.data['target_train_data']
source_valid_data_path = c.data['source_valid_data']
target_valid_data_path = c.data['target_valid_data']
source_test_data_path = c.data['source_test_data']
target_test_data_path = c.data['target_test_data']
# read data
source_dictionary, source_reverse_dictionary = build_dictionary(
read_words(source_train_data_path), vocabulary_size)
source_train_datas = [
sentence_to_onehot(lines, source_dictionary)
for lines in read_data(source_train_data_path)
]
target_dictionary, target_reverse_dictionary = build_dictionary(
read_words(target_train_data_path), vocabulary_size)
target_train_datas = [
sentence_to_onehot(lines, target_dictionary)
for lines in read_data(target_train_data_path)
]
source_valid_datas = [
sentence_to_onehot(lines, source_dictionary)
for lines in read_data(source_valid_data_path)
]
target_valid_datas = [
sentence_to_onehot(lines, target_dictionary)
for lines in read_data(target_valid_data_path)
]
source_test_datas = [
sentence_to_onehot(lines, source_dictionary)
for lines in read_data(source_test_data_path)
]
target_test_datas = [
sentence_to_onehot(lines, target_dictionary)
for lines in read_data(target_test_data_path)
]
# placeholder
encoder_inputs = tf.placeholder(shape=(None, None),
dtype=tf.int32,
name='encoder_inputs')
decoder_inputs = tf.placeholder(shape=(None, None),
dtype=tf.int32,
name='decoder_inputs')
decoder_labels = tf.placeholder(shape=(None, None),
dtype=tf.int32,
name='decoder_labels')
# embed
embeddings = tf.Variable(tf.random_uniform(
[vocabulary_size, input_embedding_size], -1.0, 1.0),
dtype=tf.float32,
name='embeddings')
encoder_inputs_embedded = tf.nn.embedding_lookup(embeddings,
encoder_inputs)
decoder_inputs_embedded = tf.nn.embedding_lookup(embeddings,
decoder_inputs)
# encoder
encoder_units = hidden_units
encoder_cell = tf.contrib.rnn.LSTMCell(encoder_units)
_, encoder_final_state = tf.nn.dynamic_rnn(encoder_cell,
encoder_inputs_embedded,
dtype=tf.float32,
time_major=True)
# decoder
decoder_units = encoder_units
decoder_cell = tf.contrib.rnn.LSTMCell(decoder_units)
decoder_output, decoder_final_state = tf.nn.dynamic_rnn(
decoder_cell,
decoder_inputs_embedded,
initial_state=encoder_final_state,
scope="plain_decoder",
dtype=tf.float32,
time_major=True)
decoder_logits = tf.contrib.layers.linear(decoder_output, vocabulary_size)
decoder_prediction = tf.argmax(
decoder_logits, 2) # max_time: axis=0, batch: axis=1, vocab: axis=2
# optimizer
stepwise_cross_entropy = tf.nn.softmax_cross_entropy_with_logits(
labels=tf.one_hot(decoder_labels,
depth=vocabulary_size,
dtype=tf.float32),
logits=decoder_logits,
)
loss = tf.reduce_mean(stepwise_cross_entropy)
train_op = tf.train.AdamOptimizer().minimize(loss)
saver = tf.train.Saver()
batch_idx = {'train': 0, 'valid': 0, 'test': 0}
with tf.Session() as sess:
if args.mode == 'train':
# train
loss_freq = train_step // 100
loss_log = []
loss_suffix = ''
es = EarlyStopper(max_size=5, edge_threshold=0.1)
m = Monitor(train_step)
sess.run(tf.global_variables_initializer())
for i in range(train_step):
m.monitor(i, loss_suffix)
source_train_batch, _ = batchnize(source_train_datas,
batch_size,
batch_idx['train'])
target_train_batch, batch_idx['train'] = batchnize(
target_train_datas, batch_size, batch_idx['train'])
batch_data = seq2seq(source_train_batch, target_train_batch,
max_time, vocabulary_size)
feed_dict = {
encoder_inputs: batch_data['encoder_inputs'],
decoder_inputs: batch_data['decoder_inputs'],
decoder_labels: batch_data['decoder_labels']
}
sess.run(fetches=[train_op, loss], feed_dict=feed_dict)
if i % loss_freq == 0:
source_valid_batch, _ = batchnize(source_valid_datas,
batch_size,
batch_idx['valid'])
target_valid_batch, batch_idx['valid'] = batchnize(
target_valid_datas, batch_size, batch_idx['valid'])
batch_data = seq2seq(source_valid_batch,
target_valid_batch, max_time,
vocabulary_size)
feed_dict = {
encoder_inputs: batch_data['encoder_inputs'],
decoder_inputs: batch_data['decoder_inputs'],
decoder_labels: batch_data['decoder_labels']
}
loss_val = sess.run(fetches=loss, feed_dict=feed_dict)
loss_log.append(loss_val)
loss_suffix = 'loss: %f' % loss_val
es_status = es(loss_val)
if i > train_step // 2 and es_status:
print('early stopping at step: %d' % i)
break
saver.save(sess, model_path)
print('save at %s' % model_path)
plt.plot(np.arange(len(loss_log)) * loss_freq, loss_log)
plt.savefig('%s_loss.png' % model_path)
elif args.mode == 'eval':
saver.restore(sess, model_path)
print('load from %s' % model_path)
else:
raise
# evaluate
loss_val = []
input_vectors = None
predict_vectors = None
for i in range(len(source_test_datas) // batch_size + 1):
source_test_batch, _ = batchnize(source_test_datas, batch_size,
batch_idx['test'])
target_test_batch, batch_idx['test'] = batchnize(
target_test_datas, batch_size, batch_idx['test'])
batch_data = seq2seq(source_test_batch, target_test_batch,
max_time, vocabulary_size)
feed_dict = {
encoder_inputs: batch_data['encoder_inputs'],
decoder_inputs: batch_data['decoder_inputs'],
decoder_labels: batch_data['decoder_labels']
}
pred = sess.run(fetches=decoder_prediction, feed_dict=feed_dict)
if predict_vectors is None:
predict_vectors = pred.T
else:
predict_vectors = np.vstack((predict_vectors, pred.T))
input_ = batch_data['encoder_inputs']
if input_vectors is None:
input_vectors = input_.T
else:
input_vectors = np.vstack((input_vectors, input_.T))
loss_val.append(sess.run(fetches=loss, feed_dict=feed_dict))
input_sentences = ''
predict_sentences = ''
for i, (input_vector, predict_vector) in enumerate(
zip(input_vectors[:len(source_test_datas)],
predict_vectors[:len(target_test_datas)])):
input_sentences += ' '.join([
source_reverse_dictionary[vector] for vector in input_vector
if not vector == PAD
])
predict_sentences += ' '.join([
target_reverse_dictionary[vector] for vector in predict_vector
if not vector == PAD
])
if i < len(source_test_datas) - 1:
input_sentences += '\n'
predict_sentences += '\n'
evaluate_input_path = '%s.evaluate_input' % model_path
evaluate_predict_path = '%s.evaluate_predict' % model_path
with open(evaluate_input_path, 'w') as f1, \
open(evaluate_predict_path, 'w') as f2:
f1.write(input_sentences)
f2.write(predict_sentences)
print('input sequences at {}'.format(evaluate_input_path))
print('predict sequences at {}'.format(evaluate_predict_path))
print('mean of loss: %f' % np.mean(loss_val))
print('finish.')
def main(args):
tf.reset_default_graph()
# process config
c = Configs(args.config)
ROOT = os.environ['TENSOROFLOW']
model_path = '%s/examples/model/multi_layer_seq2seq/model' % ROOT
PAD = c.const['PAD']
EOS = c.const['EOS']
train_step = c.option['train_step']
max_time = c.option['max_time']
batch_size = c.option['batch_size']
vocabulary_size = c.option['vocabulary_size']
input_embedding_size = c.option['embedding_size']
hidden_units = c.option['hidden_units']
layers = c.option['layers']
datas = []
# placeholder
encoder_inputs = tf.placeholder(shape=(None, None),
dtype=tf.int32,
name='encoder_inputs')
decoder_inputs = tf.placeholder(shape=(None, None),
dtype=tf.int32,
name='decoder_inputs')
decoder_labels = tf.placeholder(shape=(None, None),
dtype=tf.int32,
name='decoder_labels')
# embed
embeddings = tf.Variable(tf.random_uniform(
[vocabulary_size, input_embedding_size], -1.0, 1.0),
dtype=tf.float32,
name='embeddings')
encoder_inputs_embedded = tf.nn.embedding_lookup(embeddings,
encoder_inputs)
decoder_inputs_embedded = tf.nn.embedding_lookup(embeddings,
decoder_inputs)
# encoder
encoder_units = hidden_units
encoder_layers = [
tf.contrib.rnn.LSTMCell(size) for size in [encoder_units] * layers
]
encoder_cell = tf.contrib.rnn.MultiRNNCell(encoder_layers)
encoder_output, encoder_final_state = tf.nn.dynamic_rnn(
encoder_cell,
encoder_inputs_embedded,
dtype=tf.float32,
time_major=True)
del encoder_output
# decoder
decoder_units = encoder_units
decoder_layers = [
tf.contrib.rnn.LSTMCell(size) for size in [decoder_units] * layers
]
decoder_cell = tf.contrib.rnn.MultiRNNCell(decoder_layers)
decoder_output, decoder_final_state = tf.nn.dynamic_rnn(
decoder_cell,
decoder_inputs_embedded,
initial_state=encoder_final_state,
scope="plain_decoder",
dtype=tf.float32,
time_major=True)
decoder_logits = tf.contrib.layers.linear(decoder_output, vocabulary_size)
decoder_prediction = tf.argmax(
decoder_logits, 2) # max_time: axis=0, batch: axis=1, vocab: axis=2
# optimizer
stepwise_cross_entropy = tf.nn.softmax_cross_entropy_with_logits(
labels=tf.one_hot(decoder_labels,
depth=vocabulary_size,
dtype=tf.float32),
logits=decoder_logits,
)
loss = tf.reduce_mean(stepwise_cross_entropy)
train_op = tf.train.AdamOptimizer().minimize(loss)
saver = tf.train.Saver()
with tf.Session() as sess:
if args.mode == 'train':
# train
loss_freq = train_step // 100
loss_log = []
loss_suffix = ''
es = EarlyStopper(max_size=5, edge_threshold=0.1)
m = Monitor(train_step)
sess.run(tf.global_variables_initializer())
for i in range(train_step):
m.monitor(i, loss_suffix)
batch_data = through(datas, max_time, batch_size,
vocabulary_size)
feed_dict = {
encoder_inputs: batch_data['encoder_inputs'],
decoder_inputs: batch_data['decoder_inputs'],
decoder_labels: batch_data['decoder_labels']
}
sess.run(fetches=[train_op, loss], feed_dict=feed_dict)
if i % loss_freq == 0:
batch_data = through(datas, max_time, batch_size,
vocabulary_size)
feed_dict = {
encoder_inputs: batch_data['encoder_inputs'],
decoder_inputs: batch_data['decoder_inputs'],
decoder_labels: batch_data['decoder_labels']
}
loss_val = sess.run(fetches=loss, feed_dict=feed_dict)
loss_log.append(loss_val)
loss_suffix = 'loss: %f' % loss_val
es_status = es(loss_val)
if i > train_step // 2 and es_status:
print('early stopping at step: %d' % i)
break
saver.save(sess, model_path)
print('save at %s' % model_path)
plt.plot(np.arange(len(loss_log)) * loss_freq, loss_log)
plt.savefig('%s_loss.png' % model_path)
elif args.mode == 'eval':
saver.restore(sess, model_path)
print('load from %s' % model_path)
else:
raise
# evaluate
batch_data = through(datas, max_time, batch_size, vocabulary_size)
feed_dict = {
encoder_inputs: batch_data['encoder_inputs'],
decoder_inputs: batch_data['decoder_inputs'],
decoder_labels: batch_data['decoder_labels']
}
pred = sess.run(fetches=decoder_prediction, feed_dict=feed_dict)
input_ = batch_data['encoder_inputs']
loss_val = sess.run(fetches=loss, feed_dict=feed_dict)
print('input sequences...\n{}'.format(input_))
print('predict sequences...\n{}'.format(pred))
print('loss: %f' % loss_val)
print('finish.')
def run(**kwargs):
'''
Setup TF, gym environment, etc.
'''
logdir = kwargs['logdir']
seed = kwargs['seed']
headless = kwargs['headless']
if headless:
import matplotlib
################################################################
# SEEDS
################################################################
tf.set_random_seed(seed * 20)
np.random.seed(seed * 20)
################################################################
# SETUP GYM + RL ALGO
################################################################
env = gym.make('snake-v0') # Make the gym environment
################################################################
# TF BOILERPLATE
################################################################
tf_config = tf.ConfigProto(inter_op_parallelism_threads=1,
intra_op_parallelism_threads=1)
sess = tf.Session(config=tf_config)
def rgb2gray(rgb):
return np.dot(rgb[..., :3], [0.299, 0.587, 0.114])
with tf.Session() as sess:
network = DQN(
sess,
create_basic([64, 64, 256], transpose=True),
[(env.world.number_of_snakes) * 2 + 1, env.world.screen_width,
env.world.screen_height],
None,
n_actions=4,
batch_size=None,
gamma=.99,
update_freq=None,
ddqn=True, # double dqn
buffer_size=None,
clip_grad=None,
batches_per_epoch=None,
is_sparse=False,
use_priority=False)
monitor = Monitor(os.path.join(logdir, 'test_gifs'))
# summary_writer = tf.summary.FileWriter(logdir)
## Load model from where you left off
## Does not play nice w/ plots in tensorboard at the moment
## TODO: FIX
saver = tf.train.Saver(max_to_keep=2)
if True:
try:
print('Loading Model...')
ckpt = tf.train.get_checkpoint_state(
os.path.join(os.getcwd(), logdir))
saver.restore(sess, ckpt.model_checkpoint_path)
iteration_offset = int(
ckpt.model_checkpoint_path.split('-')[-1].split('.')[0])
except:
print('Failed to load. Starting from scratch')
sess.run(tf.global_variables_initializer())
sess.run(tf.local_variables_initializer())
iteration_offset = 0
else:
sess.run(tf.global_variables_initializer())
sess.run(tf.local_variables_initializer())
iteration_offset = 0
################################################################
# Fill Buffer
################################################################
tic = time.time()
total_timesteps = 0
for iteration in range(5):
obs = env.reset()
# obs = env.render('rgb_array', headless = headless).astype(float)
# obs /= obs.max()
# obs = rgb2gray(obs)
done_n = np.array([False] * env.n_actors)
steps = 0
viewer = None
while not done_n.all():
if True:
if (not viewer) and (not headless):
from gym.envs.classic_control import rendering
viewer = rendering.SimpleImageViewer()
rgb = env.render('rgb_array', headless=headless)
scaler = 10
rgb = repeat_upsample(rgb, scaler, scaler)
if not headless:
viewer.imshow(rgb)
time.sleep(.01)
monitor.add(rgb, iteration, iteration)
last_obs = np.array([[x.A for x in obs]])
acts = network.greedy_select(
last_obs, 0) #network.greedy_select([[last_obs]], 0)
acts = [str(x) for x in acts]
# Next step
obs, reward_n, done_n = env.step(acts[-1])
# obs = env.render('rgb_array', headless = headless).astype(float)
# obs /= obs.max()
# obs = rgb2gray(obs)
steps += 1
if steps > 300:
break
monitor.make_gifs(iteration, fps=12)
pdb.set_trace()
def run(**kwargs):
'''
Setup TF, gym environment, etc.
'''
iterations=kwargs['iterations']
discount=kwargs['discount']
batch_size=kwargs['batch_size']
num_batches=kwargs['num_batches']
max_seq_length=kwargs['max_seq_length']
learning_rate=kwargs['learning_rate']
animate=kwargs['animate']
logdir=kwargs['logdir']
seed=kwargs['seed']
games_played_per_epoch=kwargs['games_played_per_epoch']
load_model = False
mcts_iterations=kwargs['mcts_iterations']
batches_per_epoch=kwargs['batches_per_epoch']
headless=kwargs['headless']
update_freq=kwargs['update_freq']
buffer_size=kwargs['buffer_size']
if headless:
import matplotlib
################################################################
# SEEDS
################################################################
tf.set_random_seed(seed)
np.random.seed(seed)
################################################################
# SETUP GYM + RL ALGO
################################################################
env = gym.make('snake-v0') # Make the gym environment
maximum_number_of_steps = max_seq_length #or env.max_episode_steps # Maximum length for episodes
################################################################
# TF BOILERPLATE
################################################################
tf_config = tf.ConfigProto(inter_op_parallelism_threads=1, intra_op_parallelism_threads=1)
sess = tf.Session(config=tf_config)
summary_writers = []
for idx in np.arange(env.n_actors):
summary_writers.append(tf.summary.FileWriter(os.path.join(logdir,'tensorboard','snake_%s' % idx) ))
summary_writers.append(tf.summary.FileWriter(os.path.join(logdir,'tensorboard','training_stats') ))
def rgb2gray(rgb):
return np.dot(rgb[...,:3], [0.299, 0.587, 0.114])
with tf.Session() as sess:
network = DQN(
sess,
create_basic([16,16,64], transpose=True),
[1,env.world.screen_width,env.world.screen_height],
summary_writers[-1],
n_actions=4,
batch_size=batch_size,
gamma=.99,
update_freq=update_freq,
ddqn=True, # double dqn
buffer_size = buffer_size,
clip_grad = None,
batches_per_epoch = batches_per_epoch,
is_sparse = False
)
monitor = Monitor(os.path.join(logdir,'gifs'))
epsilon_schedule = LinearSchedule(iterations*9/10, 1.0, 0.01)
learning_rate_schedule = PiecewiseSchedule([(0,1e-3),(20000,5e-4),(50000,1e-4)], outside_value=1e-4)
saver = tf.train.Saver(max_to_keep=2)
# summary_writer = tf.summary.FileWriter(logdir)
## Load model from where you left off
## Does not play nice w/ plots in tensorboard at the moment
## TODO: FIX
if load_model == True:
try:
print ('Loading Model...')
ckpt = tf.train.get_checkpoint_state(logdir)
saver.restore(sess,ckpt.model_checkpoint_path)
iteration_offset = int(ckpt.model_checkpoint_path.split('-')[-1].split('.')[0])
except:
print ('Failed to load. Starting from scratch')
sess.run(tf.global_variables_initializer())
sess.run(tf.local_variables_initializer())
iteration_offset = 0
else:
sess.run(tf.global_variables_initializer())
sess.run(tf.local_variables_initializer())
iteration_offset = 0
summary_writers[0].add_graph(sess.graph)
################################################################
# Fill Buffer
################################################################
tic = time.time()
total_timesteps = 0
while not network.buffer.full(N=buffer_size/2):
network.buffer.games_played += 1
print 'Game number: %s. Buffer_size: %s' % (network.buffer.games_played, network.buffer.buffer_size)
_ = env.reset()
obs = env.render('rgb_array', headless = headless).astype(float)
obs /= obs.max()
obs = rgb2gray(obs)
done_n = np.array([False]*env.n_actors)
steps = 0
while not done_n.all():
last_obs = obs
acts = network.greedy_select([[last_obs]], 1.)
acts = [str(x) for x in acts]
# Next step
_, reward_n, done_n = env.step(acts[-1])
obs = env.render('rgb_array', headless = headless).astype(float)
obs /= obs.max()
obs = rgb2gray(obs)
steps += 1
network.store(np.array([[last_obs]]), # state
np.array(acts), # action
np.array(reward_n), #rewards
np.array([[obs]]), #new state
np.array(done_n) #done
)
if steps > maximum_number_of_steps:
done_n[:] = True
print 'Filled Buffer'
################################################################
# Train Loop
################################################################
network.buffer.soft_reset()
total_number_of_steps_in_iteration = 0
for iteration in range(iteration_offset, iteration_offset + iterations):
print('{0} Iteration {1} {0}'.format('*'*10, iteration))
timesteps_in_iteration = 0
if (iteration % update_freq == 0):
saver.save(sess,os.path.join(logdir,'model-'+str(iteration)+'.cptk'))
print "Saved Model. Timestep count: %s" % iteration
total_reward = np.array([0]*env.n_actors)
while True:
network.buffer.games_played += 1
if (((network.buffer.games_played) % 10) == 0):
print 'Epoch: %s. Game number: %s' % (iteration, network.buffer.games_played)
_ = env.reset()
rgb = obs = env.render('rgb_array', headless = headless).astype(float)
obs /= obs.max()
obs = rgb2gray(obs)
animate_episode = (iteration % (update_freq) == 0) and animate
done_n = np.array([False]*env.n_actors)
steps = 0
# Runs policy, collects observations and rewards
viewer = None
while not done_n.all():
if animate_episode:
if (not viewer) and (not headless):
from gym.envs.classic_control import rendering
viewer = rendering.SimpleImageViewer()
rgb = env.render('rgb_array', headless = headless)
scaler = 10
rgb=repeat_upsample(rgb,scaler,scaler)
if not headless:
viewer.imshow(rgb)
time.sleep(.01)
monitor.add(rgb, iteration, network.buffer.games_played)
# ob = get_data(np.array(raw_observations)[-2:])
last_obs = obs
# Control the exploration
acts = network.greedy_select([[last_obs]], epsilon_schedule.value(network.epoch)) # epsilon greedy
acts = [str(x) for x in acts]
# Next step
_, reward_n, done_n = env.step(acts[-1])
obs = env.render('rgb_array', headless = headless).astype(float)
obs /= obs.max()
obs = rgb2gray(obs)
total_reward += np.array(reward_n)
if total_number_of_steps_in_iteration % 4 == 0:
network.train_step(learning_rate_schedule)
total_number_of_steps_in_iteration += 1
steps += 1
network.store(np.array([[last_obs]]), # state
np.array(acts), # action
np.array(reward_n), #rewards
np.array([[obs]]), #new state
np.array(done_n) #done
)
# terminate the collection of data if the controller shows stability
# for a long time. This is a good thing.
if steps > maximum_number_of_steps:
done_n[:] = True
if viewer:
viewer.close()
if network.buffer.games_played >= 1:
break
monitor.make_gifs(iteration)
for count, writer in enumerate(summary_writers):
if count < (len(summary_writers) - 1):
summary = tf.Summary()
summary.value.add(tag='Average Reward', simple_value=(total_reward[count]))
summary.value.add(tag='Steps Taken', simple_value=(steps))
writer.add_summary(summary, iteration)
writer.flush()
class Dense_MLP:
def __init__(self, dimensions, activations):
"""
:param dimensions: (tpl/ list) Dimensions of the neural net. (input, hidden layer, output)
:param activations: (tpl/ list) Activations functions.
Example of three hidden layer with
- 3312 input features
- 3000 hidden neurons
- 3000 hidden neurons
- 3000 hidden neurons
- 5 output classes
layers --> [1, 2, 3, 4, 5]
----------------------------------------
dimensions = (3312, 3000, 3000, 3000, 5)
activations = ( Relu, Relu, Relu, Sigmoid)
"""
self.n_layers = len(dimensions)
self.loss = None
self.learning_rate = None
self.momentum = None
self.weight_decay = None
self.dropout_rate = 0. # dropout rate
self.dimensions = dimensions
self.save_filename = ""
self.monitor = None
# Weights and biases are initiated by index. For a one hidden layer net you will have a w[1] and w[2]
self.w = {}
self.b = {}
self.pdw = {}
self.pdd = {}
# Activations are also initiated by index. For the example we will have activations[2] and activations[3]
self.activations = {}
for i in range(len(dimensions) - 1):
# He uniform initialization
limit = np.sqrt(6. / float(dimensions[i]))
self.w[i + 1] = np.random.uniform(
-limit, limit, (dimensions[i], dimensions[i + 1]))
self.b[i + 1] = np.zeros(dimensions[i + 1])
self.activations[i + 2] = activations[i]
def _feed_forward(self, x, drop=False):
"""
Execute a forward feed through the network.
:param x: (array) Batch of input data vectors.
:return: (tpl) Node outputs and activations per layer. The numbering of the output is equivalent to the layer numbers.
"""
# w(x) + b
z = {}
# activations: f(z)
a = {
1: x
} # First layer has no activations as input. The input x is the input.
masks = {}
for i in range(1, self.n_layers):
z[i + 1] = a[i] @ self.w[i] + self.b[i]
a[i + 1] = self.activations[i + 1].activation(z[i + 1])
if drop:
if i < self.n_layers - 1:
# apply dropout
a[i + 1], keep_mask = dropout(a[i + 1], self.dropout_rate)
masks[i + 1] = keep_mask
return z, a, masks
def _back_prop(self, z, a, masks, y_true):
"""
The input dicts keys represent the layers of the net.
a = { 1: x,
2: f(w1(x) + b1)
3: f(w2(a2) + b2)
4: f(w3(a3) + b3)
5: f(w4(a4) + b4)
}
:param z: (dict) w(x) + b
:param a: (dict) f(z)
:param y_true: (array) One hot encoded truth vector.
:return:
"""
keep_prob = 1.
if self.dropout_rate > 0:
keep_prob = np.float32(1. - self.dropout_rate)
# Determine partial derivative and delta for the output layer.
# delta output layer
delta = self.loss.delta(y_true, a[self.n_layers])
dw = np.dot(a[self.n_layers - 1].T, delta)
update_params = {self.n_layers - 1: (dw, np.mean(delta, axis=0))}
# In case of three layer net will iterate over i = 2 and i = 1
# Determine partial derivative and delta for the rest of the layers.
# Each iteration requires the delta from the previous layer, propagating backwards.
for i in reversed(range(2, self.n_layers)):
# dropout for the backpropagation step
if keep_prob != 1:
delta = (delta @ self.w[i].transpose()
) * self.activations[i].prime(z[i])
delta = delta * masks[i]
delta /= keep_prob
else:
delta = (delta @ self.w[i].transpose()
) * self.activations[i].prime(z[i])
dw = np.dot(a[i - 1].T, delta)
update_params[i - 1] = (dw, np.mean(delta, axis=0))
for k, v in update_params.items():
self._update_w_b(k, v[0], v[1])
def _update_w_b(self, index, dw, delta):
"""
Update weights and biases.
:param index: (int) Number of the layer
:param dw: (array) Partial derivatives
:param delta: (array) Delta error.
"""
# perform the update with momentum
if index not in self.pdw:
self.pdw[index] = -self.learning_rate * dw
self.pdd[index] = -self.learning_rate * delta
else:
self.pdw[index] = self.momentum * self.pdw[
index] - self.learning_rate * dw
self.pdd[index] = self.momentum * self.pdd[
index] - self.learning_rate * delta
self.w[index] += self.pdw[index] - self.weight_decay * self.w[index]
self.b[index] += self.pdd[index] - self.weight_decay * self.b[index]
def fit(self,
x,
y_true,
x_test,
y_test,
loss,
epochs,
batch_size,
learning_rate=1e-3,
momentum=0.9,
weight_decay=0.0002,
dropoutrate=0.,
testing=True,
save_filename="",
monitor=False):
"""
:param x: (array) Containing parameters
:param y_true: (array) Containing one hot encoded labels.
:return (array) A 2D array of metrics (epochs, 3).
"""
if not x.shape[0] == y_true.shape[0]:
raise ValueError("Length of x and y arrays don't match")
self.monitor = Monitor(
save_filename=save_filename) if monitor else None
# Initiate the loss object with the final activation function
self.loss = loss()
self.learning_rate = learning_rate
self.momentum = momentum
self.weight_decay = weight_decay
self.dropout_rate = dropoutrate
self.save_filename = save_filename
maximum_accuracy = 0
metrics = np.zeros((epochs, 4))
for i in range(epochs):
# Shuffle the data
seed = np.arange(x.shape[0])
np.random.shuffle(seed)
x_ = x[seed]
y_ = y_true[seed]
if self.monitor:
self.monitor.start_monitor()
# training
t1 = datetime.datetime.now()
for j in range(x.shape[0] // batch_size):
k = j * batch_size
l = (j + 1) * batch_size
z, a, masks = self._feed_forward(x_[k:l], True)
self._back_prop(z, a, masks, y_[k:l])
t2 = datetime.datetime.now()
if self.monitor:
self.monitor.stop_monitor()
print("\nDense-MLP Epoch ", i)
print("Training time: ", t2 - t1)
# test model performance on the test data at each epoch
# this part is useful to understand model performance and can be commented for production settings
if (testing):
t3 = datetime.datetime.now()
accuracy_test, activations_test = self.predict(
x_test, y_test, batch_size)
accuracy_train, activations_train = self.predict(
x, y_true, batch_size)
t4 = datetime.datetime.now()
maximum_accuracy = max(maximum_accuracy, accuracy_test)
loss_test = self.loss.loss(y_test, activations_test)
loss_train = self.loss.loss(y_true, activations_train)
metrics[i, 0] = loss_train
metrics[i, 1] = loss_test
metrics[i, 2] = accuracy_train
metrics[i, 3] = accuracy_test
print(f"Testing time: {t4 - t3}\n; Loss test: {loss_test}; \n"
f"Accuracy test: {accuracy_test}; \n"
f"Maximum accuracy val: {maximum_accuracy}")
# save performance metrics values in a file
if save_filename != "":
np.savetxt(save_filename + ".txt", metrics)
if self.save_filename != "" and self.monitor:
with open(self.save_filename + "_monitor.json", 'w') as file:
file.write(
json.dumps(self.monitor.get_stats(),
indent=4,
sort_keys=True,
default=str))
return metrics
def predict(self, x_test, y_test, batch_size=100):
"""
:param x_test: (array) Test input
:param y_test: (array) Correct test output
:param batch_size:
:return: (flt) Classification accuracy
:return: (array) A 2D array of shape (n_cases, n_classes).
"""
activations = np.zeros((y_test.shape[0], y_test.shape[1]))
for j in range(x_test.shape[0] // batch_size):
k = j * batch_size
l = (j + 1) * batch_size
_, a_test, _ = self._feed_forward(x_test[k:l], drop=False)
activations[k:l] = a_test[self.n_layers]
accuracy = compute_accuracy(activations, y_test)
return accuracy, activations
def make_env():
env = make_mujoco_env(args.env, args.seed)
# env = gym.make(env_id)
env = Monitor(env, logger.get_dir(), allow_early_resets=True)
return env
def run(**kwargs):
'''
Setup TF, gym environment, etc.
'''
iterations = kwargs['iterations']
discount = kwargs['discount']
batch_size = kwargs['batch_size']
num_batches = kwargs['num_batches']
max_seq_length = kwargs['max_seq_length']
learning_rate = kwargs['learning_rate']
animate = kwargs['animate']
logdir = kwargs['logdir']
seed = kwargs['seed']
games_played_per_epoch = kwargs['games_played_per_epoch']
load_model = False
mcts_iterations = kwargs['mcts_iterations']
batches_per_epoch = kwargs['batches_per_epoch']
headless = kwargs['headless']
update_freq = kwargs['update_freq']
buffer_size = kwargs['buffer_size']
use_priority = kwargs['use_priority']
policy_batch_size = kwargs['policy_batch_size']
reservoir_buffer_size = kwargs['reservoir_buffer_size']
if headless:
import matplotlib
################################################################
# SEEDS
################################################################
tf.set_random_seed(seed)
np.random.seed(seed)
################################################################
# SETUP GYM + RL ALGO
################################################################
env = gym.make('snake-v1') # Make the gym environment
maximum_number_of_steps = max_seq_length #or env.max_episode_steps # Maximum length for episodes
################################################################
# TF BOILERPLATE
################################################################
tf_config = tf.ConfigProto(inter_op_parallelism_threads=1,
intra_op_parallelism_threads=1)
sess = tf.Session(config=tf_config)
summary_writers = []
for idx in np.arange(env.n_actors):
summary_writers.append(
tf.summary.FileWriter(
os.path.join(logdir, 'tensorboard', 'snake_%s' % idx)))
summary_writers.append(
tf.summary.FileWriter(
os.path.join(logdir, 'tensorboard', 'training_stats')))
with tf.Session() as sess:
networks = []
for i in range(env.n_actors):
networks.append(
SelfPlay(
sess,
create_basic([64, 64, 256], transpose=True),
[(env.n_actors) * 2 + 1, env.world.screen_width,
env.world.screen_height],
summary_writers[-1],
n_actions=4,
batch_size=batch_size,
gamma=.99,
update_freq=update_freq,
ddqn=True, # double dqn
buffer_size=buffer_size,
clip_grad=None,
batches_per_epoch=batches_per_epoch,
is_sparse=True,
use_priority=use_priority,
_id=i,
policy_batch_size=policy_batch_size,
reservoir_buffer_size=reservoir_buffer_size))
monitor = Monitor(os.path.join(logdir, 'gifs'))
epsilon_schedule = PiecewiseSchedule(
[(0, .2), (50000, .05), (75000, .01)],
outside_value=.01) #LinearSchedule(iterations*60/100, 1., 0.001)
eta_schedule = PiecewiseSchedule(
[(0, .8), (60000, .4)],
outside_value=.4) #LinearSchedule(iterations*60/100, 0.2, 0.1)
if use_priority:
beta_schedule = LinearSchedule(iterations, 0.4, 1.)
learning_rate_schedule = PiecewiseSchedule([(0, 1e-3), (30000, 5e-4),
(60000, 1e-4)],
outside_value=1e-4)
policy_learning_rate_schedule = PiecewiseSchedule([(0, 1e-3),
(4000, 5e-4),
(20000, 1e-4)],
outside_value=1e-4)
saver = tf.train.Saver(max_to_keep=2)
# summary_writer = tf.summary.FileWriter(logdir)
## Load model from where you left off
## Does not play nice w/ plots in tensorboard at the moment
## TODO: FIX
if load_model == True:
try:
print('Loading Model...')
ckpt = tf.train.get_checkpoint_state(logdir)
saver.restore(sess, ckpt.model_checkpoint_path)
iteration_offset = int(
ckpt.model_checkpoint_path.split('-')[-1].split('.')[0])
except:
print('Failed to load. Starting from scratch')
sess.run(tf.global_variables_initializer())
sess.run(tf.local_variables_initializer())
iteration_offset = 0
else:
sess.run(tf.global_variables_initializer())
sess.run(tf.local_variables_initializer())
iteration_offset = 0
summary_writers[0].add_graph(sess.graph)
################################################################
# Train Loop
################################################################
tic = time.time()
total_timesteps = 0
while not all([
network.buffer.full(N=int(buffer_size / 2.))
for network in networks
]):
networks[0].buffer.games_played += 1
print 'Game number: %s. Buffer_sizes: %s' % (
networks[0].buffer.games_played,
[network.buffer.buffer_size for network in networks])
obs = env.reset()
done_n = np.array([False] * env.n_actors)
steps = 0
length_alive = np.array([0] * env.n_actors)
viewer = None
while not done_n.all():
length_alive[env.world.idxs_of_alive_snakes] += 1
last_obs = obs
acts = []
for i, network in enumerate(networks):
act = network.greedy_select(
np.array([[x.A for x in get_data(last_obs, i)]]), 1.)
acts += [str(act[0])]
# Next step
obs, reward_n, done_n = env.step(acts)
steps += 1
for i in env.world.idxs_of_alive_snakes:
priority = networks[i].get_error(
np.array(get_data(last_obs, i)), np.array(acts[i]),
np.array(reward_n[i]), np.array(get_data(obs, i)),
np.array(done_n[i]))
networks[i].store(
np.array(get_data(last_obs, i)), # state
np.array(acts[i]), # action
np.array(reward_n[i]), #rewards
np.array(get_data(obs, i)), #new state
np.array(done_n[i]), #done
priority=priority)
# networks[i].store_reservoir(np.array(get_data(last_obs, i)), # state
# np.array(int(acts[i])))
# terminate the collection of data if the controller shows stability
# for a long time. This is a good thing.
if steps > maximum_number_of_steps:
done_n[:] = True
print 'Filled Buffer'
to_learn = np.array([0] * env.n_actors)
frames_seen = np.array([0] * env.n_actors)
for iteration in range(iteration_offset,
iteration_offset + iterations + 1):
print('{0} Iteration {1} {0}'.format('*' * 10, iteration))
networks[0].buffer.soft_reset()
timesteps_in_iteration = 0
if (iteration % update_freq == 0):
saver.save(
sess,
os.path.join(logdir, 'model-' + str(iteration) + '.cptk'))
print "Saved Model. Timestep count: %s" % iteration
total_number_of_steps_in_iteration = 0
total_reward = np.array([0] * env.n_actors)
while True:
networks[0].buffer.games_played += 1
if (((networks[0].buffer.games_played) % 10) == 0):
print 'Epoch: %s. Game number: %s' % (
iteration, networks[0].buffer.games_played)
obs = env.reset()
# raw_observations = []
# raw_observations.append(np.array(obs))
animate_episode = ((networks[0].buffer.games_played - 1)
== 0) and (iteration % update_freq
== 0) and animate
done_n = np.array([False] * env.n_actors)
steps = 0
# Runs policy, collects observations and rewards
viewer = None
length_alive = np.array([0] * env.n_actors)
game_time = time.time()
action_times = []
learn_times = []
select_from_average = np.array([True] * env.n_actors)
for idx in range(select_from_average.shape[0]):
r = np.random.uniform()
eta = eta_schedule.value(iteration)
if (eta > 0) and (r <= eta):
select_from_average[idx] = False # Sample from greedy
while not done_n.all():
if animate_episode:
if (not viewer) and (not headless):
from gym.envs.classic_control import rendering
viewer = rendering.SimpleImageViewer()
rgb = env.render('rgb_array', headless=headless)
scaler = 10
rgb = repeat_upsample(rgb, scaler, scaler)
if not headless:
viewer.imshow(rgb)
time.sleep(.01)
monitor.add(rgb, iteration,
networks[0].buffer.games_played)
length_alive[env.world.idxs_of_alive_snakes] += 1
to_learn[env.world.idxs_of_alive_snakes] += 1
# ob = get_data(np.array(raw_observations)[-2:])
last_obs = obs
# Control the exploration
acts = []
action_time = time.time()
for i, network in enumerate(networks):
if env.world.snakes[i].alive:
act = network.select_from_policy(
np.array([[x.A
for x in get_data(last_obs, i)]]),
epsilon_schedule.value(iteration),
select_from_average[i])
acts += [str(act[0])]
else:
acts += [str(0)]
action_times.append(time.time() - action_time)
# Next step
obs, reward_n, done_n = env.step(acts)
total_reward += np.array(reward_n)
total_number_of_steps_in_iteration += 1
steps += 1
for i in env.world.idxs_of_alive_snakes:
priority = networks[i].get_error(
np.array(get_data(last_obs, i)), np.array(acts[i]),
np.array(reward_n[i]), np.array(get_data(obs, i)),
np.array(done_n[i]))
networks[i].store(
np.array(get_data(last_obs, i)), # state
np.array(acts[i]), # action
np.array(reward_n[i]), #rewards
np.array(get_data(obs, i)), #new state
np.array(done_n[i]), #done
priority=priority)
if not select_from_average[i]:
networks[i].store_reservoir(
np.array(get_data(last_obs, i)), # state
np.array(int(acts[i])))
# max: to cover all new steps added to buffer, min: to not overdo too much
learn_time = time.time()
for network_id in [
x for x in range(len(to_learn))
if to_learn[x] >= max(
networks[x].batch_size,
networks[x].avg_policy_batch_size)
]:
to_learn[network_id] = 0
network = networks[network_id]
for _ in range(5):
frames_seen[network_id] += networks[
network_id].batch_size
if use_priority:
network.train_step(learning_rate_schedule,
beta_schedule)
else:
network.train_step(learning_rate_schedule)
for _ in range(5):
if network.reservoir.buffer_size > 0:
network.avg_policy_train_step(
policy_learning_rate_schedule)
learn_times.append(time.time() - learn_time)
# terminate the collection of data if the controller shows stability
# for a long time. This is a good thing.
if steps > maximum_number_of_steps:
done_n[:] = True
if viewer:
viewer.close()
if networks[0].buffer.games_played >= 1:
break
game_time = time.time() - game_time
monitor.make_gifs(iteration)
for count, writer in enumerate(summary_writers[:-1]):
summary = tf.Summary()
summary.value.add(tag='Average Reward',
simple_value=(total_reward[count]))
summary.value.add(tag='Steps Taken',
simple_value=(length_alive[count]))
summary.value.add(tag='Frames Seen',
simple_value=frames_seen[count])
writer.add_summary(summary, iteration)
writer.flush()
summary = tf.Summary()
summary.value.add(tag='Time Elapsed/Game', simple_value=game_time)
summary.value.add(tag='Time Elapsed/Total Actions',
simple_value=np.sum(action_times))
summary.value.add(tag='Time Elapsed/Mean Actions',
simple_value=np.mean(action_times))
summary.value.add(tag='Time Elapsed/Max Actions',
simple_value=np.max(action_times))
summary.value.add(tag='Time Elapsed/Min Actions',
simple_value=np.min(action_times))
summary.value.add(tag='Time Elapsed/Total Learn',
simple_value=np.sum(learn_times))
summary.value.add(tag='Time Elapsed/Mean Learn',
simple_value=np.mean(learn_times))
summary.value.add(tag='Time Elapsed/Max Learn',
simple_value=np.max(learn_times))
summary.value.add(tag='Time Elapsed/Min Learn',
simple_value=np.min(learn_times))
summary_writers[-1].add_summary(summary, iteration)
summary_writers[-1].flush()
print game_time, sum(action_times), sum(learn_times)
class SET_MLP:
def __init__(self, dimensions, activations, epsilon=20):
"""
:param dimensions: (tpl/ list) Dimensions of the neural net. (input, hidden layer, output)
:param activations: (tpl/ list) Activations functions.
Example of three hidden layer with
- 3312 input features
- 3000 hidden neurons
- 3000 hidden neurons
- 3000 hidden neurons
- 5 output classes
layers --> [1, 2, 3, 4, 5]
----------------------------------------
dimensions = (3312, 3000, 3000, 3000, 5)
activations = ( Relu, Relu, Relu, Sigmoid)
"""
self.n_layers = len(dimensions)
self.loss = None
self.dropout_rate = 0. # dropout rate
self.learning_rate = None
self.momentum = None
self.weight_decay = None
self.epsilon = epsilon # control the sparsity level as discussed in the paper
self.zeta = None # the fraction of the weights removed
self.dimensions = dimensions
self.save_filename = ""
self.input_layer_connections = []
self.monitor = None
# Weights and biases are initiated by index. For a one hidden layer net you will have a w[1] and w[2]
self.w = {}
self.b = {}
self.pdw = {}
self.pdd = {}
# Activations are also initiated by index. For the example we will have activations[2] and activations[3]
self.activations = {}
for i in range(len(dimensions) - 1):
self.w[i + 1] = create_sparse_weights(
self.epsilon, dimensions[i],
dimensions[i + 1]) # create sparse weight matrices
self.b[i + 1] = np.zeros(dimensions[i + 1], dtype='float32')
self.activations[i + 2] = activations[i]
def _feed_forward(self, x, drop=False):
"""
Execute a forward feed through the network.
:param x: (array) Batch of input data vectors.
:return: (tpl) Node outputs and activations per layer. The numbering of the output is equivalent to the layer numbers.
"""
# w(x) + b
z = {}
# activations: f(z)
a = {
1: x
} # First layer has no activations as input. The input x is the input.
masks = {}
for i in range(1, self.n_layers):
z[i + 1] = a[i] @ self.w[i] + self.b[i]
a[i + 1] = self.activations[i + 1].activation(z[i + 1])
if drop:
if i < self.n_layers - 1:
# apply dropout
a[i + 1], keep_mask = dropout(a[i + 1], self.dropout_rate)
masks[i + 1] = keep_mask
return z, a, masks
def _back_prop(self, z, a, masks, y_true):
"""
The input dicts keys represent the layers of the net.
a = { 1: x,
2: f(w1(x) + b1)
3: f(w2(a2) + b2)
4: f(w3(a3) + b3)
5: f(w4(a4) + b4)
}
:param z: (dict) w(x) + b
:param a: (dict) f(z)
:param y_true: (array) One hot encoded truth vector.
:return:
"""
keep_prob = 1.
if self.dropout_rate > 0:
keep_prob = np.float32(1. - self.dropout_rate)
# Determine partial derivative and delta for the output layer.
# delta output layer
delta = self.loss.delta(y_true, a[self.n_layers])
dw = coo_matrix(self.w[self.n_layers - 1], dtype='float32')
# compute backpropagation updates
backpropagation_updates_numpy(a[self.n_layers - 1], delta, dw.row,
dw.col, dw.data)
update_params = {
self.n_layers - 1: (dw.tocsr(), np.mean(delta, axis=0))
}
# In case of three layer net will iterate over i = 2 and i = 1
# Determine partial derivative and delta for the rest of the layers.
# Each iteration requires the delta from the previous layer, propagating backwards.
for i in reversed(range(2, self.n_layers)):
# dropout for the backpropagation step
if keep_prob != 1:
delta = (delta @ self.w[i].transpose()
) * self.activations[i].prime(z[i])
delta = delta * masks[i]
delta /= keep_prob
else:
delta = (delta @ self.w[i].transpose()
) * self.activations[i].prime(z[i])
dw = coo_matrix(self.w[i - 1], dtype='float32')
# compute backpropagation updates
backpropagation_updates_numpy(a[i - 1], delta, dw.row, dw.col,
dw.data)
update_params[i - 1] = (dw.tocsr(), np.mean(delta, axis=0))
for k, v in update_params.items():
self._update_w_b(k, v[0], v[1])
def _update_w_b(self, index, dw, delta):
"""
Update weights and biases.
:param index: (int) Number of the layer
:param dw: (array) Partial derivatives
:param delta: (array) Delta error.
"""
# perform the update with momentum
if index not in self.pdw:
self.pdw[index] = -self.learning_rate * dw
self.pdd[index] = -self.learning_rate * delta
else:
self.pdw[index] = self.momentum * self.pdw[
index] - self.learning_rate * dw
self.pdd[index] = self.momentum * self.pdd[
index] - self.learning_rate * delta
self.w[index] += self.pdw[index] - self.weight_decay * self.w[index]
self.b[index] += self.pdd[index] - self.weight_decay * self.b[index]
def fit(self,
x,
y_true,
x_test,
y_test,
loss,
epochs,
batch_size,
learning_rate=1e-3,
momentum=0.9,
weight_decay=0.0002,
zeta=0.3,
dropoutrate=0.,
testing=True,
save_filename="",
monitor=False):
"""
:param x: (array) Containing parameters
:param y_true: (array) Containing one hot encoded labels.
:return (array) A 2D array of metrics (epochs, 3).
"""
if not x.shape[0] == y_true.shape[0]:
raise ValueError("Length of x and y arrays don't match")
self.monitor = Monitor(
save_filename=save_filename) if monitor else None
# Initiate the loss object with the final activation function
self.loss = loss()
self.learning_rate = learning_rate
self.momentum = momentum
self.weight_decay = weight_decay
self.zeta = zeta
self.dropout_rate = dropoutrate
self.save_filename = save_filename
self.input_layer_connections.append(self.get_core_input_connections())
np.savez_compressed(self.save_filename + "_input_connections.npz",
inputLayerConnections=self.input_layer_connections)
maximum_accuracy = 0
metrics = np.zeros((epochs, 4))
for i in range(epochs):
# Shuffle the data
seed = np.arange(x.shape[0])
np.random.shuffle(seed)
x_ = x[seed]
y_ = y_true[seed]
if self.monitor:
self.monitor.start_monitor()
# training
t1 = datetime.datetime.now()
for j in range(x.shape[0] // batch_size):
k = j * batch_size
l = (j + 1) * batch_size
z, a, masks = self._feed_forward(x_[k:l], True)
self._back_prop(z, a, masks, y_[k:l])
t2 = datetime.datetime.now()
if self.monitor:
self.monitor.stop_monitor()
print("\nSET-MLP Epoch ", i)
print("Training time: ", t2 - t1)
# test model performance on the test data at each epoch
# this part is useful to understand model performance and can be commented for production settings
if testing:
t3 = datetime.datetime.now()
accuracy_test, activations_test = self.predict(x_test, y_test)
accuracy_train, activations_train = self.predict(x, y_true)
t4 = datetime.datetime.now()
maximum_accuracy = max(maximum_accuracy, accuracy_test)
loss_test = self.loss.loss(y_test, activations_test)
loss_train = self.loss.loss(y_true, activations_train)
metrics[i, 0] = loss_train
metrics[i, 1] = loss_test
metrics[i, 2] = accuracy_train
metrics[i, 3] = accuracy_test
print(f"Testing time: {t4 - t3}\n; Loss test: {loss_test}; \n"
f"Accuracy test: {accuracy_test}; \n"
f"Maximum accuracy val: {maximum_accuracy}")
t5 = datetime.datetime.now()
if i < epochs - 1: # do not change connectivity pattern after the last epoch
# self.weights_evolution_I() # this implementation is more didactic, but slow.
self.weights_evolution_II(
) # this implementation has the same behaviour as the one above, but it is much faster.
t6 = datetime.datetime.now()
print("Weights evolution time ", t6 - t5)
# save performance metrics values in a file
if self.save_filename != "":
np.savetxt(self.save_filename + ".txt", metrics)
if self.save_filename != "" and self.monitor:
with open(self.save_filename + "_monitor.json", 'w') as file:
file.write(
json.dumps(self.monitor.get_stats(),
indent=4,
sort_keys=True,
default=str))
return metrics
def get_core_input_connections(self):
values = np.sort(self.w[1].data)
first_zero_pos = find_first_pos(values, 0)
last_zero_pos = find_last_pos(values, 0)
largest_negative = values[int((1 - self.zeta) * first_zero_pos)]
smallest_positive = values[int(
min(values.shape[0] - 1, last_zero_pos + self.zeta *
(values.shape[0] - last_zero_pos)))]
wlil = self.w[1].tolil()
wdok = dok_matrix((self.dimensions[0], self.dimensions[1]),
dtype="float32")
# remove the weights closest to zero
keep_connections = 0
for ik, (row, data) in enumerate(zip(wlil.rows, wlil.data)):
for jk, val in zip(row, data):
if (val < largest_negative) or (val > smallest_positive):
wdok[ik, jk] = val
keep_connections += 1
return wdok.tocsr().getnnz(axis=1)
def weights_evolution_I(self):
# this represents the core of the SET procedure. It removes the weights closest to zero in each layer and add new random weights
for i in range(1, self.n_layers - 1):
values = np.sort(self.w[i].data)
first_zero_pos = find_first_pos(values, 0)
last_zero_pos = find_last_pos(values, 0)
largest_negative = values[int((1 - self.zeta) * first_zero_pos)]
smallest_positive = values[int(
min(
values.shape[0] - 1, last_zero_pos + self.zeta *
(values.shape[0] - last_zero_pos)))]
wlil = self.w[i].tolil()
pdwlil = self.pdw[i].tolil()
wdok = dok_matrix((self.dimensions[i - 1], self.dimensions[i]),
dtype="float32")
pdwdok = dok_matrix((self.dimensions[i - 1], self.dimensions[i]),
dtype="float32")
# remove the weights closest to zero
keep_connections = 0
for ik, (row, data) in enumerate(zip(wlil.rows, wlil.data)):
for jk, val in zip(row, data):
if (val < largest_negative) or (val > smallest_positive):
wdok[ik, jk] = val
pdwdok[ik, jk] = pdwlil[ik, jk]
keep_connections += 1
limit = np.sqrt(6. / float(self.dimensions[i]))
# add new random connections
for kk in range(self.w[i].data.shape[0] - keep_connections):
ik = np.random.randint(0, self.dimensions[i - 1])
jk = np.random.randint(0, self.dimensions[i])
while (wdok[ik, jk] != 0):
ik = np.random.randint(0, self.dimensions[i - 1])
jk = np.random.randint(0, self.dimensions[i])
wdok[ik, jk] = np.random.uniform(-limit, limit)
pdwdok[ik, jk] = 0
self.pdw[i] = pdwdok.tocsr()
self.w[i] = wdok.tocsr()
def weights_evolution_II(self):
# this represents the core of the SET procedure. It removes the weights closest to zero in each layer and add new random weights
# improved running time using numpy routines - Amarsagar Reddy Ramapuram Matavalam ([email protected])
for i in range(1, self.n_layers - 1):
# uncomment line below to stop evolution of dense weights more than 80% non-zeros
# if self.w[i].count_nonzero() / (self.w[i].get_shape()[0]*self.w[i].get_shape()[1]) < 0.8:
t_ev_1 = datetime.datetime.now()
# converting to COO form - Added by Amar
wcoo = self.w[i].tocoo()
vals_w = wcoo.data
rows_w = wcoo.row
cols_w = wcoo.col
pdcoo = self.pdw[i].tocoo()
vals_pd = pdcoo.data
rows_pd = pdcoo.row
cols_pd = pdcoo.col
# print("Number of non zeros in W and PD matrix before evolution in layer",i,[np.size(valsW), np.size(valsPD)])
values = np.sort(self.w[i].data)
first_zero_pos = find_first_pos(values, 0)
last_zero_pos = find_last_pos(values, 0)
largest_negative = values[int((1 - self.zeta) * first_zero_pos)]
smallest_positive = values[int(
min(
values.shape[0] - 1, last_zero_pos + self.zeta *
(values.shape[0] - last_zero_pos)))]
#remove the weights (W) closest to zero and modify PD as well
vals_w_new = vals_w[(vals_w > smallest_positive) |
(vals_w < largest_negative)]
rows_w_new = rows_w[(vals_w > smallest_positive) |
(vals_w < largest_negative)]
cols_w_new = cols_w[(vals_w > smallest_positive) |
(vals_w < largest_negative)]
new_w_row_col_index = np.stack((rows_w_new, cols_w_new), axis=-1)
old_pd_row_col_index = np.stack((rows_pd, cols_pd), axis=-1)
new_pd_row_col_index_flag = array_intersect(
old_pd_row_col_index,
new_w_row_col_index) # careful about order
vals_pd_new = vals_pd[new_pd_row_col_index_flag]
rows_pd_new = rows_pd[new_pd_row_col_index_flag]
cols_pd_new = cols_pd[new_pd_row_col_index_flag]
self.pdw[i] = coo_matrix(
(vals_pd_new, (rows_pd_new, cols_pd_new)),
(self.dimensions[i - 1], self.dimensions[i])).tocsr()
if i == 1:
self.input_layer_connections.append(
coo_matrix(
(vals_w_new, (rows_w_new, cols_w_new)),
(self.dimensions[i - 1], self.dimensions[i])).getnnz(
axis=1))
np.savez_compressed(
self.save_filename + "_input_connections.npz",
inputLayerConnections=self.input_layer_connections)
# add new random connections
keep_connections = np.size(rows_w_new)
length_random = vals_w.shape[0] - keep_connections
limit = np.sqrt(6. / float(self.dimensions[i - 1]))
random_vals = np.random.uniform(-limit, limit, length_random)
zero_vals = 0 * random_vals # explicit zeros
# adding (wdok[ik,jk]!=0): condition
while length_random > 0:
ik = np.random.randint(0,
self.dimensions[i - 1],
size=length_random,
dtype='int32')
jk = np.random.randint(0,
self.dimensions[i],
size=length_random,
dtype='int32')
random_w_row_col_index = np.stack((ik, jk), axis=-1)
random_w_row_col_index = np.unique(
random_w_row_col_index,
axis=0) # removing duplicates in new rows&cols
oldW_row_col_index = np.stack((rows_w_new, cols_w_new),
axis=-1)
unique_flag = ~array_intersect(
random_w_row_col_index,
oldW_row_col_index) # careful about order & tilda
ik_new = random_w_row_col_index[unique_flag][:, 0]
jk_new = random_w_row_col_index[unique_flag][:, 1]
# be careful - row size and col size needs to be verified
rows_w_new = np.append(rows_w_new, ik_new)
cols_w_new = np.append(cols_w_new, jk_new)
length_random = vals_w.shape[0] - np.size(
rows_w_new) # this will constantly reduce lengthRandom
# adding all the values along with corresponding row and column indices - Added by Amar
vals_w_new = np.append(
vals_w_new,
random_vals) # be careful - we can add to an existing link ?
# vals_pd_new = np.append(vals_pd_new, zero_vals) # be careful - adding explicit zeros - any reason??
if vals_w_new.shape[0] != rows_w_new.shape[0]:
print("not good")
self.w[i] = coo_matrix(
(vals_w_new, (rows_w_new, cols_w_new)),
(self.dimensions[i - 1], self.dimensions[i])).tocsr()
# print("Number of non zeros in W and PD matrix after evolution in layer",i,[(self.w[i].data.shape[0]), (self.pdw[i].data.shape[0])])
t_ev_2 = datetime.datetime.now()
print("Weights evolution time for layer", i, "is", t_ev_2 - t_ev_1)
def predict(self, x_test, y_test, batch_size=100):
"""
:param x_test: (array) Test input
:param y_test: (array) Correct test output
:param batch_size:
:return: (flt) Classification accuracy
:return: (array) A 2D array of shape (n_cases, n_classes).
"""
activations = np.zeros((y_test.shape[0], y_test.shape[1]))
for j in range(x_test.shape[0] // batch_size):
k = j * batch_size
l = (j + 1) * batch_size
_, a_test, _ = self._feed_forward(x_test[k:l], drop=False)
activations[k:l] = a_test[self.n_layers]
accuracy = compute_accuracy(activations, y_test)
return accuracy, activations
def train(env, agent, args):
monitor = Monitor(train=True, spec="-{}".format(args.method))
monitor.init_log(
args.log, "m.{}_e.{}_n.{}".format(args.model, args.env_name,
args.name))
env.reset()
initial_state = env.observe()
for num_eps in range(args.episode_num):
terminal = False
env.reset()
loss = 0
cnt = 0
act1 = 0
act2 = 0
tot_reward = 0
tot_reward_nc = 0
tot_reward_dist = 0
mask = None
next_mask = None
probe = None
if args.env_name == "dst":
probe = FloatTensor([0.8, 0.2])
elif args.env_name == "crp":
probe = FloatTensor([0.5, 0.5])
elif args.env_name in ['ft', 'ft5', 'ft7']:
probe = FloatTensor([0.8, 0.2, 0.0, 0.0, 0.0, 0.0])
while not terminal:
t_now = time.time()
state = env.observe()
t_obs = time.time() - t_now
t_now = time.time()
if args.env_name == "crp":
mask = env.env.get_action_out_mask()
action = agent.act(state, mask=mask)
t_policy = time.time() - t_now
t_now = time.time()
next_state, reward, terminal = env.step(action, step=0.5)
t_step = time.time() - t_now
if args.env_name == "crp":
next_mask = env.env.get_action_out_mask()
if args.log:
monitor.add_log(state, action, reward, terminal, agent.w_kept)
t_now = time.time()
agent.memorize(state, action, next_state, reward, terminal, mask,
next_mask)
t_mem = time.time() - t_now
t_now = time.time()
loss += agent.learn()
t_learn = time.time() - t_now
if terminal:
# terminal = True
t_now = time.time()
agent.reset()
t_reset = time.time() - t_now
tot_reward = tot_reward + (probe.cpu().numpy().dot(reward))
act1 += reward[0]
act2 += reward[1]
tot_reward_nc = tot_reward_nc + 1 - reward[0]
tot_reward_dist = tot_reward_dist + env.env.get_distortion(
absolute=True, tollerance=0) / 10
cnt = cnt + 1
# _, q = agent.predict(probe, initial_state=initial_state)
# if args.env_name == "dst":
# act_1 = q[0, 3]
# act_2 = q[0, 1]
if args.env_name == "crp":
act_1 = act1
act_2 = act2
# elif args.env_name in ['ft', 'ft5', 'ft7']:
# act_1 = q[0, 1]
# act_2 = q[0, 0]
# if args.method == "crl-naive":
# act_1 = act_1.data.cpu()
# act_2 = act_2.data.cpu()
# elif args.method == "crl-envelope":
# act_1 = probe.dot(act_1.data)
# act_2 = probe.dot(act_2.data)
# elif args.method == "crl-energy":
# act_1 = probe.dot(act_1.data)
# act_2 = probe.dot(act_2.data)
print(
"end of eps %d with total reward (1) %0.2f, the Q is %0.2f | %0.2f; loss: %0.4f; total_nc: %0.2f; total_dist: %0.2f;beta : %0.2f;eps : %0.2f;"
% (
num_eps,
tot_reward,
act_1,
act_2,
# q__max,
loss / cnt,
tot_reward_nc,
tot_reward_dist,
agent.beta,
agent.epsilon))
# print("t_obs : %0.2f;t_policy : %0.2f;t_step : %0.2f;t_mem : %0.2f;t_learn : %0.2f;t_reset : %0.2f" % (
# t_obs,
# t_policy,
# t_step,
# t_mem,
# t_learn,
# t_reset,))
monitor.update(
num_eps,
tot_reward,
act_1,
act_2,
# q__max,
loss / cnt)
if (num_eps) % 10 == 0:
agent.save(
args.save, "m.{}_e.{}_n.{}".format(args.model, args.env_name,
args.name))
agent.save(
args.save,
"m.{}_e.{}_n.{}.ep{}".format(args.model, args.env_name,
args.name, num_eps // 100))
def train(env, agent, args):
monitor = Monitor(train=True, spec="-{}".format(args.method))
monitor.init_log(
args.log, "m.{}_e.{}_n.{}".format(args.model, args.env_name,
args.name))
env.reset()
for num_eps in range(args.episode_num):
terminal = False
env.reset()
loss = 0
cnt = 0
tot_reward = 0
probe = None
if args.env_name == "dst":
probe = FloatTensor([0.8, 0.2])
elif args.env_name in ['ft', 'ft5', 'ft7']:
probe = FloatTensor([0.8, 0.2, 0.0, 0.0, 0.0, 0.0])
while not terminal:
state = env.observe()
action = agent.act(state)
next_state, reward, terminal = env.step(action)
if args.log:
monitor.add_log(state, action, reward, terminal, agent.w_kept)
agent.memorize(state, action, next_state, reward, terminal)
loss += agent.learn()
if cnt > 100:
terminal = True
agent.reset()
tot_reward = tot_reward + (
probe.cpu().numpy().dot(reward)) * np.power(args.gamma, cnt)
cnt = cnt + 1
_, q = agent.predict(probe)
if args.env_name == "dst":
act_1 = q[0, 3]
act_2 = q[0, 1]
elif args.env_name in ['ft', 'ft5', 'ft7']:
act_1 = q[0, 1]
act_2 = q[0, 0]
if args.method == "crl-naive":
act_1 = act_1.data.cpu()
act_2 = act_2.data.cpu()
elif args.method == "crl-envelope":
act_1 = probe.dot(act_1.data)
act_2 = probe.dot(act_2.data)
elif args.method == "crl-energy":
act_1 = probe.dot(act_1.data)
act_2 = probe.dot(act_2.data)
print(
"end of eps %d with total reward (1) %0.2f, the Q is %0.2f | %0.2f; loss: %0.4f"
% (
num_eps,
tot_reward,
act_1,
act_2,
# q__max,
loss / cnt))
monitor.update(
num_eps,
tot_reward,
act_1,
act_2,
# q__max,
loss / cnt)
if num_eps + 1 % 500 == 0:
agent.save(
args.save, "m.{}_e.{}_n.{}".format(args.model, args.env_name,
args.name))
def main(args):
# process config
c = Configs(args.config)
ROOT = os.environ['TENSOROFLOW']
output = c.option.get('output', 'examples/model/buf')
model_directory = '%s/%s' % (ROOT, output)
model_path = '%s/model' % model_directory
dictionary_path = {
'source': '%s/source_dictionary.pickle' % model_directory,
'source_reverse':
'%s/source_reverse_dictionary.pickle' % model_directory,
'target': '%s/target_dictionary.pickle' % model_directory,
'target_reverse':
'%s/target_reverse_dictionary.pickle' % model_directory
}
PAD = c.const['PAD']
BOS = c.const['BOS']
EOS = c.const['EOS']
train_step = c.option['train_step']
max_time = c.option['max_time']
batch_size = c.option['batch_size']
vocabulary_size = c.option['vocabulary_size']
input_embedding_size = c.option['embedding_size']
hidden_units = c.option['hidden_units']
layers = c.option['layers']
source_train_data_path = c.data['source_train_data']
target_train_data_path = c.data['target_train_data']
source_valid_data_path = c.data['source_valid_data']
target_valid_data_path = c.data['target_valid_data']
source_test_data_path = c.data['source_test_data']
target_test_data_path = c.data['target_test_data']
# initialize output directory
if pathlib.Path(model_directory).exists():
print('Warning: model %s is exists.')
print('Old model will be overwritten.')
while True:
print('Do you wanna continue? [yes|no]')
command = input('> ')
if command == 'yes':
shutil.rmtree(model_directory)
break
elif command == 'no':
sys.exit()
else:
print('You can only input "yes" or "no".')
print('Make new model: %s' % model_directory)
pathlib.Path(model_directory).mkdir()
# read data
if args.mode == 'train':
source_dictionary, source_reverse_dictionary = build_dictionary(
read_words(source_train_data_path), vocabulary_size)
source_train_datas = [
sentence_to_onehot(lines, source_dictionary)
for lines in read_data(source_train_data_path)
]
target_dictionary, target_reverse_dictionary = build_dictionary(
read_words(target_train_data_path), vocabulary_size)
target_train_datas = [
sentence_to_onehot(lines, target_dictionary)
for lines in read_data(target_train_data_path)
]
source_valid_datas = [
sentence_to_onehot(lines, source_dictionary)
for lines in read_data(source_valid_data_path)
]
target_valid_datas = [
sentence_to_onehot(lines, target_dictionary)
for lines in read_data(target_valid_data_path)
]
if args.debug:
source_train_datas = source_train_datas[:1000]
target_train_datas = source_train_datas[:1000]
else:
with open(dictionary_path['source'], 'rb') as f1, \
open(dictionary_path['source_reverse'], 'rb') as f2, \
open(dictionary_path['target'], 'rb') as f3, \
open(dictionary_path['target_reverse'], 'rb') as f4:
source_dictionary = pickle.load(f1)
source_reverse_dictionary = pickle.load(f2)
target_dictionary = pickle.load(f3)
target_reverse_dictionary = pickle.load(f4)
source_test_datas = [
sentence_to_onehot(lines, source_dictionary)
for lines in read_data(source_test_data_path)
]
target_test_datas = [
sentence_to_onehot(lines, target_dictionary)
for lines in read_data(target_test_data_path)
]
# placeholder
encoder_inputs = tf.placeholder(shape=(None, None),
dtype=tf.int32,
name='encoder_inputs')
decoder_inputs = tf.placeholder(shape=(None, None),
dtype=tf.int32,
name='decoder_inputs')
decoder_labels = tf.placeholder(shape=(None, None),
dtype=tf.int32,
name='decoder_labels')
# embed
embeddings = tf.Variable(tf.random_uniform(
[vocabulary_size, input_embedding_size], -1.0, 1.0),
dtype=tf.float32,
name='embeddings')
encoder_inputs_embedded = tf.nn.embedding_lookup(embeddings,
encoder_inputs)
decoder_inputs_embedded = tf.nn.embedding_lookup(embeddings,
decoder_inputs)
# encoder with bidirection
encoder_units = hidden_units
encoder_layers_fw = [
tf.contrib.rnn.LSTMCell(size) for size in [encoder_units] * layers
]
encoder_cell_fw = tf.contrib.rnn.MultiRNNCell(encoder_layers_fw)
encoder_layers_bw = [
tf.contrib.rnn.LSTMCell(size) for size in [encoder_units] * layers
]
encoder_cell_bw = tf.contrib.rnn.MultiRNNCell(encoder_layers_bw)
(encoder_output_fw,
encoder_output_bw), encoder_state = tf.nn.bidirectional_dynamic_rnn(
encoder_cell_fw,
encoder_cell_bw,
encoder_inputs_embedded,
dtype=tf.float32,
time_major=True)
encoder_outputs = tf.concat((encoder_output_fw, encoder_output_bw), 2)
encoder_state = tuple(
tf.contrib.rnn.LSTMStateTuple(
tf.concat((encoder_state[0][layer].c,
encoder_state[1][layer].c), 1),
tf.concat((encoder_state[0][layer].h,
encoder_state[1][layer].h), 1))
for layer in range(layers))
# decoder with attention
decoder_units = encoder_units * 2
attention_units = decoder_units
decoder_layers = [
tf.contrib.rnn.LSTMCell(size) for size in [decoder_units] * layers
]
cell = tf.contrib.rnn.MultiRNNCell(decoder_layers)
sequence_length = tf.cast([max_time] * batch_size, dtype=tf.int32)
beam_width = 1
tiled_encoder_outputs = tf.contrib.seq2seq.tile_batch(
encoder_outputs, multiplier=beam_width)
tiled_encoder_final_state = tf.contrib.seq2seq.tile_batch(
encoder_state, multiplier=beam_width)
tiled_sequence_length = tf.contrib.seq2seq.tile_batch(
sequence_length, multiplier=beam_width)
attention_mechanism = tf.contrib.seq2seq.LuongAttention(
num_units=attention_units,
memory=tiled_encoder_outputs,
memory_sequence_length=tiled_sequence_length)
attention_cell = tf.contrib.seq2seq.AttentionWrapper(
cell, attention_mechanism, attention_layer_size=256)
decoder_initial_state = attention_cell.zero_state(dtype=tf.float32,
batch_size=batch_size *
beam_width)
decoder_initial_state = decoder_initial_state.clone(
cell_state=tiled_encoder_final_state)
if args.mode == 'train':
helper = tf.contrib.seq2seq.TrainingHelper(
inputs=decoder_inputs_embedded,
sequence_length=tf.cast([max_time] * batch_size, dtype=tf.int32),
time_major=True)
elif args.mode == 'eval':
"""
helper = tf.contrib.seq2seq.TrainingHelper(
inputs=decoder_inputs_embedded,
sequence_length=tf.cast([max_time] * batch_size, dtype=tf.int32),
time_major=True)
"""
helper = tf.contrib.seq2seq.GreedyEmbeddingHelper(
embedding=embeddings,
start_tokens=tf.tile([BOS], [batch_size]),
end_token=EOS)
decoder = tf.contrib.seq2seq.BasicDecoder(
cell=attention_cell,
helper=helper,
initial_state=decoder_initial_state)
decoder_outputs = tf.contrib.seq2seq.dynamic_decode(
decoder=decoder,
output_time_major=True,
impute_finished=False,
maximum_iterations=max_time)
decoder_logits = tf.contrib.layers.linear(decoder_outputs[0][0],
vocabulary_size)
decoder_prediction = tf.argmax(
decoder_logits, 2) # max_time: axis=0, batch: axis=1, vocab: axis=2
# optimizer
stepwise_cross_entropy = tf.nn.softmax_cross_entropy_with_logits(
labels=tf.one_hot(decoder_labels,
depth=vocabulary_size,
dtype=tf.float32),
logits=decoder_logits,
)
loss = tf.reduce_mean(stepwise_cross_entropy)
regularizer = 0.0 * tf.nn.l2_loss(decoder_outputs[0][0])
train_op = tf.train.AdamOptimizer().minimize(loss + regularizer)
saver = tf.train.Saver()
minibatch_idx = {'train': 0, 'valid': 0, 'test': 0}
with tf.Session() as sess:
if args.mode == 'train':
# train
global_max_step = train_step * (
len(source_train_datas) // batch_size + 1)
loss_freq = global_max_step // 100 if global_max_step > 100 else 1
loss_log = []
batch_loss_log = []
loss_suffix = ''
es = EarlyStopper(max_size=5, edge_threshold=0.1)
m = Monitor(global_max_step)
log = Logger('%s/log' % model_directory)
sess.run(tf.global_variables_initializer())
global_step = 0
stop_flag = False
for batch in range(train_step):
if stop_flag:
break
current_batch_loss_log = []
while True: # minibatch process
m.monitor(global_step, loss_suffix)
source_train_batch, _ = batchnize(source_train_datas,
batch_size,
minibatch_idx['train'])
target_train_batch, minibatch_idx['train'] = batchnize(
target_train_datas, batch_size, minibatch_idx['train'])
batch_data = seq2seq(source_train_batch,
target_train_batch,
max_time,
vocabulary_size,
reverse=True)
feed_dict = {
encoder_inputs: batch_data['encoder_inputs'],
decoder_inputs: batch_data['decoder_inputs'],
decoder_labels: batch_data['decoder_labels']
}
sess.run(fetches=[train_op, loss], feed_dict=feed_dict)
if global_step % loss_freq == 0:
source_valid_batch, _ = batchnize(
source_valid_datas, batch_size,
minibatch_idx['valid'])
target_valid_batch, minibatch_idx['valid'] = batchnize(
target_valid_datas, batch_size,
minibatch_idx['valid'])
batch_data = seq2seq(source_valid_batch,
target_valid_batch,
max_time,
vocabulary_size,
reverse=True)
feed_dict = {
encoder_inputs: batch_data['encoder_inputs'],
decoder_inputs: batch_data['decoder_inputs'],
decoder_labels: batch_data['decoder_labels']
}
loss_val = sess.run(fetches=loss, feed_dict=feed_dict)
loss_log.append(loss_val)
current_batch_loss_log.append(loss_val)
loss_suffix = 'loss: %f' % loss_val
global_step += 1
if minibatch_idx['train'] == 0:
batch_loss = np.mean(current_batch_loss_log)
batch_loss_log.append(batch_loss)
loss_msg = 'Batch: {}/{}, batch loss: {}'.format(
batch + 1, train_step, batch_loss)
print(loss_msg)
log(loss_msg)
es_status = es(batch_loss)
if batch > train_step // 2 and es_status:
print('early stopping at step: %d' % global_step)
stop_flag = True
break
# save tf.graph and variables
saver.save(sess, model_path)
print('save at %s' % model_path)
# save plot of loss
plt.plot(np.arange(len(loss_log)) * loss_freq, loss_log)
plt.savefig('%s_global_loss.png' % model_path)
plt.figure()
plt.plot(np.arange(len(batch_loss_log)), batch_loss_log)
plt.savefig('%s_batch_loss.png' % model_path)
# save dictionary
with open(dictionary_path['source'], 'wb') as f1, \
open(dictionary_path['source_reverse'], 'wb') as f2, \
open(dictionary_path['target'], 'wb') as f3, \
open(dictionary_path['target_reverse'], 'wb') as f4:
pickle.dump(source_dictionary, f1)
pickle.dump(source_reverse_dictionary, f2)
pickle.dump(target_dictionary, f3)
pickle.dump(target_reverse_dictionary, f4)
elif args.mode == 'eval':
saver.restore(sess, model_path)
print('load from %s' % model_path)
else:
raise # args.mode should be train or eval
# evaluate
loss_val = []
input_vectors = None
predict_vectors = None
for i in range(len(source_test_datas) // batch_size + 1):
source_test_batch, _ = batchnize(source_test_datas, batch_size,
minibatch_idx['test'])
target_test_batch, minibatch_idx['test'] = batchnize(
target_test_datas, batch_size, minibatch_idx['test'])
batch_data = seq2seq(source_test_batch,
target_test_batch,
max_time,
vocabulary_size,
reverse=True)
feed_dict = {
encoder_inputs: batch_data['encoder_inputs'],
decoder_inputs: batch_data['decoder_inputs'],
decoder_labels: batch_data['decoder_labels']
}
pred = sess.run(fetches=decoder_prediction, feed_dict=feed_dict)
if predict_vectors is None:
predict_vectors = pred.T
else:
predict_vectors = np.vstack((predict_vectors, pred.T))
input_ = batch_data['encoder_inputs']
if input_vectors is None:
input_vectors = input_.T
else:
input_vectors = np.vstack((input_vectors, input_.T))
loss_val.append(sess.run(fetches=loss, feed_dict=feed_dict))
input_sentences = ''
predict_sentences = ''
ignore_token = EOS
for i, (input_vector, predict_vector) in enumerate(
zip(input_vectors[:len(source_test_datas)],
predict_vectors[:len(target_test_datas)])):
input_sentences += ' '.join([
source_reverse_dictionary[vector] for vector in input_vector
if not vector == ignore_token
])
predict_sentences += ' '.join([
target_reverse_dictionary[vector] for vector in predict_vector
if not vector == ignore_token
])
if i < len(source_test_datas) - 1:
input_sentences += '\n'
predict_sentences += '\n'
evaluate_input_path = '%s.evaluate_input' % model_path
evaluate_predict_path = '%s.evaluate_predict' % model_path
with open(evaluate_input_path, 'w') as f1, \
open(evaluate_predict_path, 'w') as f2:
f1.write(input_sentences)
f2.write(predict_sentences)
print('input sequences at {}'.format(evaluate_input_path))
print('predict sequences at {}'.format(evaluate_predict_path))
print('mean of loss: %f' % np.mean(loss_val))
print('finish.')
