def main():
parser = argparse.ArgumentParser()
parser.add_argument("--environment", type=str, default='Pendulum-v0')
parser.add_argument("--time-steps", type=int, default=30000)
parser.add_argument("--replay-mem-size", type=int, default=1000000)
parser.add_argument("--batch-size", type=int, default=64)
parser.add_argument("--learning-rate", type=float, default=.9)
args = parser.parse_args()
env = gym.make(args.environment)
unroll = 20
state_dim = env.observation_space.shape[0]
action_dim = env.action_space.shape[0]
action_bound_high = env.action_space.high
action_bound_low = env.action_space.low
agent = direct_policy_search(state_dim, action_dim, action_bound_high,
action_bound_low, unroll, .9, 5,
'direct_policy_search')
# Replay memory
memory = Memory(args.replay_mem_size)
with tf.Session() as sess:
sess.run(tf.global_variables_initializer())
state = env.reset()
total_rewards = 0.0
epoch = 1
for time_steps in range(args.time_steps):
#env.render()
action = agent.act(sess, state)
next_state, reward, done, _ = env.step(action)
total_rewards += float(reward)
# Store tuple in replay memory
memory.add([
np.atleast_2d(state),
np.atleast_2d(action), reward,
np.atleast_2d(next_state), done
])
# Training step
batch = np.array(memory.sample(args.batch_size))
assert len(batch) > 0
states = np.concatenate(batch[:, 0], axis=0)
# Train the agent
agent.train(sess, states)
# s <- s'
state = np.copy(next_state)
if done == True:
print 'time steps', time_steps, 'epoch', epoch, 'total rewards', total_rewards, 'unroll', unroll
epoch += 1
total_rewards = 0.
state = env.reset()
class DDPG:
def __init__(self, env, batch_size=32, gamma=0.99,
hidden_units=32, maxlen=10000,
tau=0.1, actor_lr=0.001, critic_lr=0.001):
self.env=env
self.batch_size=batch_size
self.gamma=gamma
self.maxlen=maxlen
self.sess=tf.Session()
self.actor=Actor(env, self.sess, hidden_units, tau, actor_lr)
self.critic=Critic(env, self.sess, hidden_units, tau, critic_lr)
self.memory=Memory(maxlen)
self.sess.run(tf.global_variables_initializer())
self.step=0
def store(self, exp):
self.memory.add(exp)
def update(self, ):
if len(self.memory.buffer)<1000:#self.batch_size:
return
self.step+=1
data = self.memory.sample(self.batch_size)
s=np.array([d[0] for d in data])
a=np.array([d[1] for d in data])
r=np.array([d[2] for d in data])
s_=np.array([d[3] for d in data])
a_=self.actor.target_model.predict(s_)
target_q=self.critic.target_model.predict([s_, a_])
#y=np.array([d[2] for d in data])
#for i in range(self.batch_size):
# y[i]+=self.gamma*target_q[i]
y=r[:,np.newaxis]+self.gamma*target_q
self.critic.model.train_on_batch([s, a], y)
action=self.actor.model.predict(s)
grads=self.critic.get_grads(s, action)
self.actor.train(s,grads)
if self.step%10==0:
self.actor.update_weights()
self.critic.update_weights()
def get_action(self, s):
return self.actor.get_action(s)
def main():
parser = argparse.ArgumentParser()
parser.add_argument("--environment", type=str, default='Pendulum-v0')
parser.add_argument("--action-dim", type=int, default=1)
parser.add_argument("--state-dim", type=int, default=1)
#parser.add_argument("--epochs", type=int, default=30000)
parser.add_argument("--time-steps", type=int, default=30000)
parser.add_argument('--tau',
type=float,
help='soft target update parameter',
default=0.01)
parser.add_argument("--action-bound", type=float, default=1.)
parser.add_argument("--replay-mem-size", type=int, default=1000000)
parser.add_argument("--batch-size", type=int, default=64)
parser.add_argument("--learning-rate", type=float, default=.9)
parser.add_argument("--latent-size",
type=int,
default=4,
help='Size of vector for Z')
parser.add_argument("--model", type=str, default='gan')
parser.add_argument("--mode", type=str, default='none')
args = parser.parse_args()
assert args.mode in ['none', 'test', 'transfer']
assert args.model in [
'mlp', 'gan', 'gated', 'dmlac_mlp', 'dmlac_gan', 'dmlac_gated',
'ddpg_unrolled_pg_mlp', 'dmlac_gp', 'dmlac_truth', 'mpc'
]
if args.model == 'dmlac_truth':
assert args.environment == 'Pendulum-v0'
# Initialize environment
env = gym.make(args.environment)
args.state_dim = env.observation_space.shape[0]
args.action_dim = env.action_space.shape[0]
#assert args.action_dim == 1
args.action_bound_high = env.action_space.high
args.action_bound_low = env.action_space.low
assert len(args.action_bound_high) == len(args.action_bound_low)
for i in range(len(args.action_bound_high)):
assert args.action_bound_high[i] == -args.action_bound_low[i]
print(args)
jointddpg, update_target_actor, update_target_critic, copy_target_actor, copy_target_critic = init_model(
[None, args.state_dim], args.action_dim, args.latent_size,
args.learning_rate, args.action_bound_low, args.action_bound_high,
args.tau, args.model)
# Replay memory
memory = Memory(args.replay_mem_size)
# Actor noise
exploration_strategy = OUStrategy(jointddpg, env)
with tf.Session() as sess:
sess.run(tf.global_variables_initializer())
#sess.run(copy_target_critic)
#sess.run(copy_target_actor)
if args.mode in ['test', 'transfer']:
env.seed(1)
state = env.reset()
total_rewards = 0.0
epoch = 1
for time_steps in range(args.time_steps):
env.render()
# Choose an action
exploration = (float(args.time_steps - time_steps) /
float(args.time_steps))**4
action = exploration_strategy.action(sess, state[np.newaxis, ...],
exploration)
# Execute action
state1, reward, done, _ = env.step(action)
total_rewards += float(reward)
# Store tuple in replay memory
memory.add([
state[np.newaxis, ...], action[np.newaxis, ...], reward,
state1[np.newaxis, ...], done
])
# Training step
batch_B = np.array(memory.sample(args.batch_size))
assert len(batch_B) > 0
states_B = np.concatenate(batch_B[:, 0], axis=0)
actions_B = np.concatenate(batch_B[:, 1], axis=0)
rewards_B = batch_B[:, 2]
states1_B = np.concatenate(batch_B[:, 3], axis=0)
dones_B = batch_B[:, 4]
#Get another batch
batch_M = np.array(memory.sample(args.batch_size))
assert len(batch_M) > 0
states_M = np.vstack(batch_M[:, 0])
actions_M = np.concatenate(batch_M[:, 1], axis=0)
if args.model == 'dmlac_gp':
jointddpg.update_hist(memory)
jointddpg.train(sess, states_B, actions_B, rewards_B,
states1_B, dones_B, states_M, actions_M,
len(batch_M), args.latent_size)
# Update target networks
#jointddpg.update(self, sess, update_target_critic, update_target_actor)
#sess.run(update_target_critic)
#sess.run(update_target_actor)
state = np.copy(state1)
if done == True:
print 'time steps', time_steps, 'epoch', epoch, 'total rewards', total_rewards
epoch += 1
total_rewards = 0.
if args.mode == 'transfer':
if time_steps >= args.time_steps / 3:
env.seed(0)
else:
env.seed(1)
elif args.mode == 'test':
env.seed(1)
state = env.reset()
if args.mode == 'transfer':
if time_steps == args.time_steps / 3:
memory = Memory(args.replay_mem_size)
class DDPGagent:
def __init__(self, hidden_size, env):
self.num_states = env.observation_space.shape[0]
self.num_actions = env.action_space.shape[0]
self.Actor = Actor(input_size=self.num_states,
hidden_size=hidden_size,
output_size=self.num_actions).cuda()
self.Actor_target = Actor(input_size=self.num_states,
hidden_size=hidden_size,
output_size=self.num_actions).cuda()
self.Critic = Critic(input_size=self.num_states,
hidden_size=hidden_size,
output_size=self.num_actions).cuda()
self.Critic_target = Critic(input_size=self.num_states,
hidden_size=hidden_size,
output_size=self.num_actions).cuda()
for target_param, param in zip(self.Actor_target.parameters(),
self.Actor.parameters()):
target_param.data = param.data
for target_param, param in zip(self.Critic_target.parameters(),
self.Critic.parameters()):
target_param.data = param.data
self.Memory = Memory(30000)
self.criterion = nn.MSELoss().cuda()
self.actor_optimizer = torch.optim.Adam(self.Actor.parameters(),
lr=1e-2)
self.critic_optimizer = torch.optim.Adam(self.Critic.parameters(),
lr=1e-1)
def get_action(self, state):
state = torch.from_numpy(state).float().unsqueeze(0).cuda()
action = self.Actor.forward(state)
action = action.detach().cpu().numpy()
return action
def update(self, batch_size):
states, actions, rewards, next_states, _ = self.Memory.sample(
batch_size)
states = torch.tensor(states).cuda()
actions = torch.tensor(actions).cuda()
rewards = torch.tensor(rewards).cuda()
next_states = torch.tensor(next_states).cuda()
Q_Value = self.Critic.forward(states, action=actions)
next_actions = self.Actor_target(next_states)
next_Q = self.Critic_target.forward(next_states, next_actions.detach())
Q_prime = rewards + 0.99 * next_Q
critic_loss = self.criterion(Q_Value, Q_prime)
policy_loss = -self.Critic.forward(states,
self.Actor.forward(states)).mean()
self.actor_optimizer.zero_grad()
policy_loss.backward()
self.actor_optimizer.step()
self.critic_optimizer.zero_grad()
critic_loss.backward()
self.critic_optimizer.step()
for target_param, param in zip(self.Actor_target.parameters(),
self.Actor.parameters()):
target_param.data = (param.data * 1e-2 + target_param.data *
(1.0 - 1e-2))
for target_param, param in zip(self.Critic_target.parameters(),
self.Critic.parameters()):
target_param.data.copy_(param.data * 1e-2 + target_param.data *
(1.0 - 1e-2))
def main():
parser = argparse.ArgumentParser()
parser.add_argument("--env-interface", type=str, default='gym!atari')
parser.add_argument("--environment", type=str, default='CartPole-v0')
parser.add_argument("--action-size", type=int, default=2)
parser.add_argument("--input-shape", type=list, default=[None, 4])
parser.add_argument("--target-update-freq", type=int, default=200)
parser.add_argument("--epsilon-max", type=float, default=1.)
parser.add_argument("--epsilon-min", type=float, default=.01)
parser.add_argument("--epsilon-decay", type=float, default=.001)
parser.add_argument("--learning-rate", type=float, default=.99)
parser.add_argument("--batch-size", type=int, default=64)
parser.add_argument("--epochs", type=int, default=30000)
parser.add_argument("--replay-mem-size", type=int, default=1000000)
parser.add_argument("--K",
type=int,
default=1,
help='The number of steps to train the environment')
parser.add_argument(
"--L",
type=int,
default=1,
help='The number of Q-learning steps for hypothetical rollouts')
parser.add_argument("--latent-size",
type=int,
default=4,
help='Size of vector for Z')
args = parser.parse_args()
env = env_interface(args.env_interface,
args.environment,
pixel_feature=False,
render=True)
#args.action_size = env.action_space.n
args.action_size = env.action_size
args.input_shape = [None] + list(env.obs_space_shape)
print args
# Other parameters
epsilon = args.epsilon_max
# Replay memory
memory = Memory(args.replay_mem_size)
# Time step
time_step = 0.
# Initialize the GANs
cgan_state = CGAN(input_shape=args.input_shape,
action_size=args.action_size,
latent_size=args.latent_size,
gen_input_shape=args.input_shape)
cgan_reward = CGAN(input_shape=args.input_shape,
action_size=args.action_size,
latent_size=args.latent_size,
gen_input_shape=[None, 1])
qnet = qnetwork(input_shape=args.input_shape,
action_size=args.action_size,
scope='qnet')
target_qnet = qnetwork(input_shape=args.input_shape,
action_size=args.action_size,
scope='target_qnet')
update_ops = update_target_graph('qnet', 'target_qnet')
rand_no = np.random.rand()
#env = gym.wrappers.Monitor(env, '/tmp/cartpole-experiment-' + str(rand_no), force=True, video_callable=False)
init = tf.initialize_all_variables()
with tf.Session() as sess:
sess.run(init)
for epoch in range(args.epochs):
total_reward = 0
observation = env.reset()
for t in range(1000000):
#env.render()
action = qnet.get_action(sess, observation)
if np.random.rand() < epsilon:
#action = env.action_space.sample()
action = np.random.randint(args.action_size)
observation1, reward, done, info = env.step(action)
total_reward += reward
# Add to memory
memory.add([observation, action, reward, observation1, done])
# Reduce epsilon
time_step += 1.
epsilon = args.epsilon_min + (
args.epsilon_max - args.epsilon_min) * np.exp(
-args.epsilon_decay * time_step)
# Training step
batch = np.array(memory.sample(args.batch_size))
qnet.train(sess, batch, args.learning_rate, target_qnet)
# Training step: environment model
for k in range(args.K):
batch = np.array(memory.sample(args.batch_size))
states = np.vstack(batch[:, 0])
actions = np.array(batch[:, 1])
rewards = batch[:, 2]
states1 = np.vstack(batch[:, 3])
_, D_loss_state = sess.run(
[cgan_state.D_solver, cgan_state.D_loss],
feed_dict={
cgan_state.states: states,
cgan_state.actions: actions,
cgan_state.Z: sample_z(len(batch),
args.latent_size),
cgan_state.X: states1
})
_, G_loss_state = sess.run(
[cgan_state.G_solver, cgan_state.G_loss],
feed_dict={
cgan_state.states: states,
cgan_state.actions: actions,
cgan_state.Z: sample_z(len(batch),
args.latent_size)
})
_, D_loss_reward = sess.run(
[cgan_reward.D_solver, cgan_reward.D_loss],
feed_dict={
cgan_reward.states: states,
cgan_reward.actions: actions,
cgan_reward.Z: sample_z(len(batch),
args.latent_size),
cgan_reward.X: rewards[..., np.newaxis]
})
_, G_loss_reward = sess.run(
[cgan_reward.G_solver, cgan_reward.G_loss],
feed_dict={
cgan_reward.states: states,
cgan_reward.actions: actions,
cgan_reward.Z: sample_z(len(batch),
args.latent_size)
})
#print D_loss_state, G_loss_state, D_loss_reward, G_loss_state
# Training step: imagination rollouts
if time_step == 0.:
print "time_step 0 here"
if time_step >= 0.:
for l in range(args.L):
batch = np.array(memory.sample(args.batch_size))
assert len(batch) > 0
states1 = np.vstack(batch[:, 3])
actions = np.random.randint(args.action_size,
size=len(batch))
dones = np.array([False] * len(batch))
G_sample_state = sess.run(cgan_state.G_sample,
feed_dict={
cgan_state.states:
states1,
cgan_state.actions:
actions,
cgan_state.Z:
sample_z(
len(batch),
args.latent_size)
})
G_sample_reward = sess.run(cgan_reward.G_sample,
feed_dict={
cgan_reward.states:
states1,
cgan_reward.actions:
actions,
cgan_reward.Z:
sample_z(
len(batch),
args.latent_size)
})
qnet.train(sess, None, args.learning_rate, target_qnet,
states1, actions, G_sample_reward,
G_sample_state, dones)
# Set observation
observation = observation1
# Update?
if int(time_step) % args.target_update_freq == 0:
#print "Updating target..."
sess.run(update_ops)
if done:
print "Episode finished after {} timesteps".format(
t + 1), 'epoch', epoch, 'total_rewards', total_reward
break
def main():
parser = argparse.ArgumentParser()
parser.add_argument("--environment",
type=str,
default='MountainCarContinuous-v0')
parser.add_argument("--unroll-steps", type=int, default=20)
parser.add_argument("--time-steps", type=int, default=30000)
parser.add_argument("--replay-mem-size", type=int, default=1000000)
parser.add_argument("--batch-size", type=int, default=64)
parser.add_argument("--discount-factor", type=float, default=1.)
parser.add_argument("--goal-position", type=float, default=.45)
args = parser.parse_args()
env = gym.make(args.environment)
env.seed(seed=args.goal_position)
state_dim = env.observation_space.shape[0]
action_dim = env.action_space.shape[0]
action_bound_high = env.action_space.high
action_bound_low = env.action_space.low
agent = direct_policy_search(state_dim, action_dim, action_bound_high,
action_bound_low, args.unroll_steps,
args.discount_factor, 1,
'direct_policy_search')
# Replay memory
memory = Memory(args.replay_mem_size)
with tf.Session() as sess:
sess.run(tf.global_variables_initializer())
#weights = pickle.load(open('../custom_environments/weights/pendulum_reward.p', 'rb'))
#weights = pickle.load(open('../custom_environments/weights/mountain_car_continuous_reward'+str(args.goal_position)+'.p', 'rb'))
#sess.run(agent.assign_ops0, feed_dict=dict(zip(agent.placeholders_reward, weights)))
weights = pickle.load(
open(
'../custom_environments/weights/mountain_car_continuous_next_state.p',
'rb'))
sess.run(agent.assign_ops1,
feed_dict=dict(zip(agent.placeholders_state, weights)))
state = env.reset()
total_rewards = 0.0
epoch = 1
for time_steps in range(args.time_steps):
env.render()
action = agent.act(sess, state)
next_state, reward, done, _ = env.step(action)
total_rewards += float(reward)
# Store tuple in replay memory
memory.add([
np.atleast_2d(state),
np.atleast_2d(action), reward,
np.atleast_2d(next_state), done
])
# Training step
batch = np.array(memory.sample(args.batch_size))
assert len(batch) > 0
states = np.concatenate(batch[:, 0], axis=0)
# Train the agent
agent.train(sess, states)
# s <- s'
state = np.copy(next_state)
if done == True:
print 'time steps', time_steps, 'epoch', epoch, 'total rewards', total_rewards, 'unroll', args.unroll_steps
epoch += 1
total_rewards = 0.
state = env.reset()
def main():
parser = argparse.ArgumentParser()
parser.add_argument("--environment", type=str, default='Pendulum-v0')
parser.add_argument("--action-dim", type=int, default=1)
parser.add_argument("--state-dim", type=int, default=1)
parser.add_argument("--epochs", type=int, default=30000)
parser.add_argument("--time-steps", type=int, default=30000)
parser.add_argument('--tau',
type=float,
help='soft target update parameter',
default=0.01)
parser.add_argument("--action-bound", type=float, default=1.)
parser.add_argument("--replay-mem-size", type=int, default=1000000)
parser.add_argument("--batch-size", type=int, default=64)
parser.add_argument("--learning-rate", type=float, default=.9)
parser.add_argument("--mode", type=str, default='none')
args = parser.parse_args()
assert args.mode in ['none', 'test', 'transfer']
# Initialize environment
env = gym.make(args.environment)
args.state_dim = env.observation_space.shape[0]
args.action_dim = env.action_space.shape[0]
#assert args.action_dim == 1
args.action_bound_high = env.action_space.high
args.action_bound_low = env.action_space.low
assert len(args.action_bound_high) == len(args.action_bound_low)
for i in range(len(args.action_bound_high)):
assert args.action_bound_high[i] == -args.action_bound_low[i]
print(args)
print(sys.argv)
# Networks
ddpg = actorcritic(state_shape=[None, args.state_dim],
action_shape=[None, args.action_dim],
output_bound_low=args.action_bound_low,
output_bound_high=args.action_bound_high,
learning_rate=args.learning_rate,
tau=args.tau)
# Replay memory
memory = Memory(args.replay_mem_size)
# Actor noise
exploration_strategy = OUStrategy(ddpg, env)
with tf.Session() as sess:
sess.run(tf.global_variables_initializer())
ddpg.copy_target(sess)
time_steps = 0.
for epoch in range(args.epochs):
state = env.reset()
total_rewards = 0.0
ts = 0
while True:
#env.render()
# Choose an action
time_steps += 1.
ts += 1
if time_steps >= args.time_steps:
exploration = 0.
else:
exploration = (float(args.time_steps - time_steps) /
float(args.time_steps))**4
action = exploration_strategy.action(sess, state[np.newaxis,
...],
exploration)
# Execute action
state1, reward, done, _ = env.step(action)
total_rewards += float(reward)
# Store tuple in replay memory
memory.add([
state[np.newaxis, ...], action[np.newaxis, ...], reward,
state1[np.newaxis, ...], done
])
# Training step
batch = np.array(memory.sample(args.batch_size))
assert len(batch) > 0
states = np.concatenate(batch[:, 0], axis=0)
actions = np.concatenate(batch[:, 1], axis=0)
rewards = batch[:, 2]
states1 = np.concatenate(batch[:, 3], axis=0)
dones = batch[:, 4]
ddpg.train(sess, states, actions, rewards, states1, dones)
# Update target networks
ddpg.update_target(sess)
state = state1.copy()
if done == True:
print 'time steps', time_steps, 'epoch', epoch, 'total rewards', total_rewards, 'epoch ts:', ts
break
class Agent():
def __init__(self, state_size, action_size, random_seed):
"""
Args:
======
state_size (int): state dim
action_size (int): action dim
random_seed (int): random seed
"""
self.state_size = state_size
self.action_size = action_size
self.seed = random.seed(random_seed)
# actor net initialization
self.actor_local = Actor(state_size, action_size, random_seed).to(device)
self.actor_target = Actor(state_size, action_size, random_seed).to(device)
self.actor_optimizer = optim.Adam(self.actor_local.parameters(), lr=LR_ACTOR)
# critic net initialization
self.critic_local = Critic(state_size, action_size, random_seed).to(device)
self.critic_target = Critic(state_size, action_size, random_seed).to(device)
self.critic_optimizer = optim.Adam(self.critic_local.parameters(), lr=LR_CRITIC, weight_decay=WEIGHT_DECAY)
# Ornstein-Uhlenbeck Exploration Noise Process
self.noise = OUNoise(action_space=action_size, seed=random_seed)
# Replay memory init
self.memory = Memory(action_size, BUFFER_SIZE, BATCH_SIZE, random_seed)
def step(self, states, actions, rewards, next_states, dones, is_learning_step, saving_wrong_step_prob = 0.9):
"""Save experience in replay memory, and use random sample from buffer to learn."""
# Save experience / reward
for state, action, reward, next_state, done in zip(states, actions, rewards, next_states, dones):
if reward> 0 or random.uniform(0,1) <= saving_wrong_step_prob:
self.memory.add(state, action, reward, next_state, done)
# Learn, if enough samples are available in memory
if len(self.memory) > BATCH_SIZE and is_learning_step:
for _ in range(10):
experiences = self.memory.sample()
self.learn(experiences, GAMMA)
def act(self, state, add_noise=True):
"""map action to state"""
state = torch.from_numpy(state).float().to(device)
self.actor_local.eval()
with torch.no_grad():
action = self.actor_local(state).cpu().data.numpy()
self.actor_local.train()
if add_noise:
action += self.noise.evolve_state()
return np.clip(action, -1, 1)
def act_on_all_agents(self, states):
"""map action to state to all agents"""
vectorized_act = np.vectorize(self.act, excluded='self', signature='(n),()->(k)')
return vectorized_act(states, True)
def reset(self):
self.noise.reset()
def learn(self, experiences, gamma):
"""Update actor and critic nets parameters
Args:
======
experiences (Tuple[torch.Tensor]): experience tuples
gamma (float): bellman discount factor
"""
states, actions, rewards, next_states, dones = experiences
# Get predicted next-state actions and Q values from target models
actions_next = self.actor_target(next_states)
Q_targets_next = self.critic_target(next_states, actions_next)
# Compute Q targets for current states (y_i)
Q_targets = rewards + (gamma * Q_targets_next * (1 - dones))
# Compute critic loss
Q_expected = self.critic_local(states, actions)
critic_loss = F.mse_loss(Q_expected, Q_targets)
# Minimize the loss
self.critic_optimizer.zero_grad()
critic_loss.backward()
self.critic_optimizer.step()
# Compute actor loss
actions_pred = self.actor_local(states)
actor_loss = -self.critic_local(states, actions_pred).mean()
# Minimize the loss
self.actor_optimizer.zero_grad()
actor_loss.backward()
self.actor_optimizer.step()
self.soft_update(self.critic_local, self.critic_target, TAU)
self.soft_update(self.actor_local, self.actor_target, TAU)
def soft_update(self, local_model, target_model, tau):
#Soft update model parameters
for target_param, local_param in zip(target_model.parameters(), local_model.parameters()):
target_param.data.copy_(tau*local_param.data + (1.0-tau)*target_param.data)
def DQN():
parser = argparse.ArgumentParser()
parser.add_argument("--environment", type=str, default='CartPole-v0')
parser.add_argument("--action-size", type=int, default=2)
parser.add_argument("--input-shape", type=list, default=[None, 4])
parser.add_argument("--target-update-freq", type=int, default=200)
parser.add_argument("--epsilon-max", type=float, default=1.)
parser.add_argument("--epsilon-min", type=float, default=.01)
parser.add_argument("--epsilon-decay", type=float, default=.001)
parser.add_argument("--discount-factor", type=float, default=.99)
parser.add_argument("--batch-size", type=int, default=64)
parser.add_argument("--epochs", type=int, default=1000)
parser.add_argument("--replay-mem-size", type=int, default=1000000)
args = parser.parse_args()
env = Environment()
args.action_size = env.nActions
args.input_shape = [None, env.stateShape]
print args
# Epsilon parameter
epsilon = 0.1 # args.epsilon_max
# Replay memory
memory = Memory(args.replay_mem_size)
# Time step
time_step = 0.
# Initialize the agent
qnet = qnetwork(input_shape=args.input_shape,
action_size=args.action_size,
scope='qnet')
tnet = qnetwork(input_shape=args.input_shape,
action_size=args.action_size,
scope='tnet')
update_ops = update_target_graph('qnet', 'tnet')
rewardHistory = np.zeros(args.epochs)
env.render()
with tf.Session() as sess:
sess.run(tf.global_variables_initializer())
for epoch in range(args.epochs):
total_reward = 0
state = env.reset()
while (True):
#env.render()
if np.random.rand() < epsilon:
action = np.random.randint(args.action_size)
else:
action = qnet.act(sess, state)
[next_state, reward, done] = env.step(action)
total_reward += reward
rewardHistory[epoch] += reward
# Add to memory
memory.add([state, action, reward, next_state, done])
# Reduce epsilon
time_step += 1.
#epsilon = args.epsilon_min + (args.epsilon_max - args.epsilon_min) * np.exp(-args.epsilon_decay * time_step)
# Training step
batch = np.array(memory.sample(args.batch_size))
qnet.train(sess, batch, args.discount_factor, tnet)
# s <- s'
state = np.copy(next_state)
# Update target network
if int(time_step) % args.target_update_freq == 0:
sess.run(update_ops)
if done:
print 'epoch:', epoch, 'total_rewards:', total_reward
break
'''
np.set_printoptions(threshold=np.nan)
for v in range(-5, 5):
policy = np.zeros((env.W, env.W), dtype='int')
for x in range(env.W):
for y in range(env.W):
policy[x,y] = qnet.act(sess, np.array([x,y,1,v]))
print(policy)
'''
plt.xlabel('episode #')
plt.ylabel('reward')
plt.plot(rewardHistory)
plt.savefig("DQN")
plt.show()
for epoch in range(10):
total_reward = 0
state = env.reset()
while (True):
env.render()
action = qnet.act(sess, state)
[next_state, reward, done] = env.step(action)
total_reward += reward
rewardHistory[epoch] += reward
# Reduce epsilon
time_step += 1.
# s <- s'
state = np.copy(next_state)
if done:
print 'epoch:', epoch, 'total_rewards:', total_reward
break
class SACagent:
def __init__(self,
state_dim,
action_dim=2,
hidden_dim=256,
lr=1e-3,
gamma=0.99,
tau=1e-2,
max_memory_size=1000000,
action_scales=[.22, .5],
maxTemp=0.5,
minTemp=0.1,
tempTimeScale=500000.0):
# use cuda?
use_cuda = torch.cuda.is_available()
device = torch.device("cuda" if use_cuda else "cpu")
self.device = device
# Params
self.state_dim = state_dim
self.action_dim = action_dim
self.hidden_dim = hidden_dim
self.gamma = gamma
self.tau = tau
self.lr = lr
self.maxTemp = maxTemp
self.minTemp = minTemp
self.tempTimeScale = tempTimeScale
self.action_scales = action_scales
# Memory replay buffer
self.memory = Memory(max_memory_size)
# Initialize all networks
self.value_net = ValueNetwork(self.state_dim,
self.hidden_dim).to(device)
self.target_value_net = ValueNetwork(self.state_dim,
self.hidden_dim).to(device)
self.soft_q_net1 = SoftQNetwork(self.state_dim, self.action_dim,
self.hidden_dim).to(device)
self.soft_q_net2 = SoftQNetwork(self.state_dim, self.action_dim,
self.hidden_dim).to(device)
self.policy_net = PolicyNetwork(self.state_dim, self.action_dim,
self.hidden_dim, self.action_scales,
device).to(device)
# Copy initial parameters from value net to target value net
for target_param, param in zip(self.target_value_net.parameters(),
self.value_net.parameters()):
target_param.data.copy_(param.data)
self.value_criterion = nn.MSELoss()
self.soft_q_criterion1 = nn.MSELoss()
self.soft_q_criterion2 = nn.MSELoss()
value_lr = self.lr #3e-4
soft_q_lr = self.lr #3e-4
policy_lr = self.lr #3e-4
self.value_optimizer = optim.Adam(self.value_net.parameters(),
lr=value_lr)
self.soft_q_optimizer1 = optim.Adam(self.soft_q_net1.parameters(),
lr=soft_q_lr)
self.soft_q_optimizer2 = optim.Adam(self.soft_q_net2.parameters(),
lr=soft_q_lr)
self.policy_optimizer = optim.Adam(self.policy_net.parameters(),
lr=policy_lr)
def get_action(self, state):
action = self.policy_net.get_action(state)
action = action.detach().numpy()
return action
def update(self, batch_size, t):
print("STARTING NETWORK UPDATES")
#state, action, reward, next_state, done = replay_buffer.sample(batch_size)
state, action, reward, next_state = self.memory.sample(batch_size)
state = torch.FloatTensor(state).to(self.device)
next_state = torch.FloatTensor(next_state).to(self.device)
action = torch.FloatTensor(action).to(self.device)
reward = torch.FloatTensor(reward).to(self.device)
#done = torch.FloatTensor(np.float32(done)).unsqueeze(1).to(device)
predicted_q_value1 = self.soft_q_net1(state, action)
predicted_q_value2 = self.soft_q_net2(state, action)
predicted_value = self.value_net(state)
new_action, log_prob, epsilon, mean, log_std = self.policy_net.evaluate(
state)
log_prob_sum = torch.sum(log_prob, dim=1)
joint_entropy = log_prob_sum.unsqueeze(1)
# Training Q Function
target_value = self.target_value_net(next_state)
target_q_value = reward + self.gamma * target_value
q_value_loss1 = self.soft_q_criterion1(predicted_q_value1,
target_q_value.detach())
q_value_loss2 = self.soft_q_criterion2(predicted_q_value2,
target_q_value.detach())
print("Q1 LOSS = " + str(q_value_loss1) + " Q2 LOSS = " +
str(q_value_loss2))
self.soft_q_optimizer1.zero_grad()
q_value_loss1.backward()
self.soft_q_optimizer1.step()
self.soft_q_optimizer2.zero_grad()
q_value_loss2.backward()
self.soft_q_optimizer2.step()
# Training Value Function
predicted_new_q_value = torch.min(self.soft_q_net1(state, new_action),
self.soft_q_net2(state, new_action))
#target_value_func = predicted_new_q_value - log_prob
alpha = max(self.minTemp,
(self.maxTemp - self.maxTemp * (t / self.tempTimeScale)))
print("ALPHA = " + str(alpha) + " min = " + str(self.minTemp) +
" max = " + str(self.maxTemp))
target_value_func = predicted_new_q_value - alpha * joint_entropy
value_loss = self.value_criterion(predicted_value,
target_value_func.detach())
print("VALUE LOSS = " + str(value_loss))
self.value_optimizer.zero_grad()
value_loss.backward()
self.value_optimizer.step()
# Training Policy Function
#policy_loss = (log_prob - predicted_new_q_value).mean()
policy_loss = (alpha * joint_entropy - predicted_new_q_value).mean()
print("POLICY LOSS = " + str(policy_loss))
self.policy_optimizer.zero_grad()
policy_loss.backward()
self.policy_optimizer.step()
for target_param, param in zip(self.target_value_net.parameters(),
self.value_net.parameters()):
target_param.data.copy_(target_param.data * (1.0 - self.tau) +
param.data * self.tau)
print("DONE WITH NETWORK UPDATES")
def main():
parser = argparse.ArgumentParser()
parser.add_argument("--environment", type=str, default='Pendulum-v0')
parser.add_argument("--action-dim", type=int, default=1)
parser.add_argument("--state-dim", type=int, default=1)
#parser.add_argument("--epochs", type=int, default=30000)
parser.add_argument("--time-steps", type=int, default=30000)
parser.add_argument('--tau', type=float, help='soft target update parameter', default=0.01)
parser.add_argument("--action-bound", type=float, default=1.)
parser.add_argument("--replay-mem-size", type=int, default=1000000)
parser.add_argument("--batch-size", type=int, default=64)
parser.add_argument("--learning-rate", type=float, default=.9)
parser.add_argument("--mode", type=str, default='none')
args = parser.parse_args()
assert args.mode in ['none', 'test', 'transfer']
# Initialize environment
env = gym.make(args.environment)
args.state_dim = env.observation_space.shape[0]
args.action_dim = env.action_space.shape[0]
#assert args.action_dim == 1
args.action_bound_high = env.action_space.high
args.action_bound_low = env.action_space.low
assert len(args.action_bound_high) == len(args.action_bound_low)
for i in range(len(args.action_bound_high)):
assert args.action_bound_high[i] == -args.action_bound_low[i]
print(args)
# Networks
ddpg = actorcritic(state_shape=[None, args.state_dim],
action_shape=[None, args.action_dim],
output_bound_low=args.action_bound_low,
output_bound_high=args.action_bound_high,
learning_rate=args.learning_rate,
tau=args.tau)
# Allocate the Gaussian process
model_been_trained = False
smodel = gp_model([None, args.state_dim], [None, args.action_dim], [None, args.state_dim], epochs=100)
rmodel = gp_model([None, args.state_dim], [None, args.action_dim], [None, 1], epochs=100)
Bold = Memory(500)
B = Memory(500)
ell = 1#Unroll depth
I = 5#Number of updates per timestep
memory_fictional = Memory(args.replay_mem_size)
# Replay memory
memory = Memory(args.replay_mem_size)
# Actor noise
exploration_strategy = OUStrategy(ddpg, env)
with tf.Session() as sess:
sess.run(tf.global_variables_initializer())
ddpg.copy_target(sess)
if args.mode in ['test', 'transfer']:
env.seed(1)
state = env.reset()
total_rewards = 0.0
epoch = 1
for time_steps in range(args.time_steps):
#env.render()
# Choose an action
exploration = (float(args.time_steps - time_steps) / float(args.time_steps)) ** 4
action = exploration_strategy.action(sess, state[np.newaxis, ...], exploration)
# Execute action
state1, reward, done, _ = env.step(action)
total_rewards += float(reward)
# Store tuple in replay memory
memory.add([state[np.newaxis, ...], action[np.newaxis, ...], reward, state1[np.newaxis, ...], done])
B.add([state[np.newaxis, ...], action[np.newaxis, ...], reward, state1[np.newaxis, ...], done])
if time_steps % args.batch_size == 0 and time_steps != 0 and model_been_trained and ell > 0:
#if time_steps >= 3 and model_been_trained:
batch = np.array(memory.sample(args.batch_size))
assert len(batch) > 0
next_states = np.concatenate([ele[3] for ele in batch], axis=0)
for _ in range(ell):
states = np.copy(next_states)
actions = np.random.uniform(low=args.action_bound_low,
high=args.action_bound_high,
size=[states.shape[0], args.action_dim])
rewards = rmodel.predict(sess, states, actions)
next_states = smodel.predict(sess, states, actions)
for state, action, reward, next_state in zip(list(states), list(actions), list(rewards), list(next_states)):
memory_fictional.add([state[np.newaxis, ...], action[np.newaxis, ...], reward, next_state[np.newaxis, ...], False])
for _ in range(I):
# Training step
batch = np.array(memory.sample(args.batch_size))
assert len(batch) > 0
states = np.concatenate(batch[:, 0], axis=0)
actions = np.concatenate(batch[:, 1], axis=0)
rewards = batch[:, 2]
states1 = np.concatenate(batch[:, 3], axis=0)
dones = batch[:, 4]
ddpg.train(sess, states, actions, rewards, states1, dones)
ddpg.update_target(sess)
for _ in range(ell):
# Training step for fictional experience
batch = np.array(memory_fictional.sample(args.batch_size))
if len(batch) > 0:
states = np.concatenate(batch[:, 0], axis=0)
actions = np.concatenate(batch[:, 1], axis=0)
rewards = batch[:, 2]
states1 = np.concatenate(batch[:, 3], axis=0)
dones = batch[:, 4]
ddpg.train(sess, states, actions, rewards, states1, dones)
ddpg.update_target(sess)
if len(B.mem) == B.max_size and ell > 0:
import copy
Bold = copy.deepcopy(B)
B.mem = []
states = np.concatenate([ele[0] for ele in Bold.mem], axis=0)
actions = np.concatenate([ele[1] for ele in Bold.mem], axis=0)
rewards = np.array([ele[2] for ele in Bold.mem])
next_states = np.concatenate([ele[3] for ele in Bold.mem], axis=0)
rmodel.train(sess, states, actions, rewards[..., np.newaxis])
smodel.train(sess, states, actions, next_states)
model_been_trained = True
state = np.copy(state1)
if done == True:
print 'time steps', time_steps, 'epoch', epoch, 'total rewards', total_rewards
epoch += 1
total_rewards = 0.
if args.mode == 'transfer':
if time_steps >= args.time_steps / 3:
env.seed(0)
else:
env.seed(1)
elif args.mode == 'test':
env.seed(1)
state = env.reset()
if args.mode == 'transfer':
if time_steps == args.time_steps / 3:
memory = Memory(args.replay_mem_size)
def main():
parser = argparse.ArgumentParser()
parser.add_argument("--environment", type=str, default='CartPole-v0')
parser.add_argument("--action-size", type=int, default=2)
parser.add_argument("--input-shape", type=list, default=[None, 4])
parser.add_argument("--target-update-freq", type=int, default=200)
parser.add_argument("--epsilon-max", type=float, default=1.)
parser.add_argument("--epsilon-min", type=float, default=.01)
parser.add_argument("--epsilon-decay", type=float, default=.001)
parser.add_argument("--learning-rate", type=float, default=.99)
parser.add_argument("--batch-size", type=int, default=64)
parser.add_argument("--epochs", type=int, default=30000)
parser.add_argument("--replay-mem-size", type=int, default=1000000)
parser.add_argument("--latent-size",
type=int,
default=4,
help='Size of vector for Z')
parser.add_argument("--model", type=str, default='gan')
args = parser.parse_args()
assert args.model in ['gan', 'gated', 'gated_reg']
env = gym.make(args.environment)
args.action_size = env.action_space.n
args.input_shape = [None, env.observation_space.shape[0]]
print args
# Other parameters
epsilon = args.epsilon_max
# Replay memory
memory = Memory(args.replay_mem_size)
# Time step
time_step = 0.
# Initialize the model
jqnet, update_ops = init_model(args.input_shape, args.action_size,
args.latent_size, args.learning_rate,
args.model)
with tf.Session() as sess:
sess.run(tf.global_variables_initializer())
for epoch in range(args.epochs):
total_reward = 0
observation = env.reset()
for t in range(1000000):
#env.render()
action = jqnet.get_action(sess, observation)
if np.random.rand() < epsilon:
action = env.action_space.sample()
observation1, reward, done, info = env.step(action)
total_reward += reward
# Add to memory
memory.add([observation, action, reward, observation1, done])
# Reduce epsilon
time_step += 1.
epsilon = args.epsilon_min + (
args.epsilon_max - args.epsilon_min) * np.exp(
-args.epsilon_decay * time_step)
# Training step
batch = np.array(memory.sample(args.batch_size))
assert len(batch) > 0
states = np.vstack(batch[:, 0])
actions = np.array(batch[:, 1])
rewards = batch[:, 2]
states1 = np.vstack(batch[:, 3])
dones = batch[:, 4].astype(np.float32)
#Get another batch
batch2 = np.array(memory.sample(args.batch_size))
assert len(batch2) > 0
states2 = np.vstack(batch2[:, 0])
actions2 = np.array(batch2[:, 1])
# Update Q
jqnet.updateQ(sess, states, actions, rewards, states1, dones,
states2, actions2, len(batch), args.latent_size)
# Update state model
jqnet.updateS(sess, states, actions, states1, states2,
actions2, len(batch), args.latent_size)
# Update reward model
jqnet.updateR(sess, states, actions, rewards, states2,
actions2, len(batch), args.latent_size)
# Set observation
observation = observation1
# Update?
if int(time_step) % args.target_update_freq == 0:
#print "Updating target..."
sess.run(update_ops)
if done:
print "Episode finished after {} timesteps".format(
t + 1), 'epoch', epoch, 'total_reward', total_reward
break
env.close()
gym.upload('/tmp/cartpole-experiment-' + str(rand_no),
api_key='sk_AlBXbTIgR4yaxPlvDpm61g')
else:
# Stack the frame of the next_state
next_state, stacked_frames = stack_frames(
stacked_frames, next_state, False)
# Add experience to memory
experience = state, action, reward, next_state, done
memory.store(experience)
# st+1 is now our current state
state = next_state
### LEARNING PART
# Obtain random mini-batch from memory
tree_idx, batch, ISWeights_mb = memory.sample(batch_size)
# batch = memory.sample(batch_size)
states_mb = np.array([each[0][0] for each in batch],
ndmin=3)
# print_var("states_mb", states_mb.shape)
actions_mb = np.array([each[0][1] for each in batch])
# print_var("actions_mb", actions_mb.shape)
# print_var("actions_mb", actions_mb)
rewards_mb = np.array([each[0][2] for each in batch])
# print_var("rewards_mb", rewards_mb.shape)
# print_var("rewards_mb", rewards_mb)
next_states_mb = np.array([each[0][3] for each in batch],
ndmin=3)
# print_var("next_states_mb", next_states_mb.shape)
class Agent:
def __init__(self, level_name):
self.level_name = level_name
# setup environment
self.env = gym_super_mario_bros.make(level_name)
self.env = JoypadSpace(self.env, SIMPLE_MOVEMENT)
# one hot encoded version of our actions
self.possible_actions = np.array(np.identity(self.env.action_space.n, dtype=int).tolist())
# resest graph
tf.reset_default_graph()
# instantiate the DQNetwork
self.DQNetwork = DQNetwork(state_size, action_size, learning_rate)
# instantiate memory
self.memory = Memory(max_size=memory_size)
# initialize deque with zero images
self.stacked_frames = deque([np.zeros((100, 128), dtype=np.int) for i in range(stack_size)], maxlen=4)
for i in range(pretrain_length):
# If it's the first step
if i == 0:
state = self.env.reset()
state, self.stacked_frames = stack_frames(self.stacked_frames, state, True)
# Get next state, the rewards, done by taking a random action
choice = random.randint(1, len(self.possible_actions)) - 1
action = self.possible_actions[choice]
next_state, reward, done, _ = self.env.step(choice)
# stack the frames
next_state, self.stacked_frames = stack_frames(self.stacked_frames, next_state, False)
# if the episode is finished (we're dead)
if done:
# we inished the episode
next_state = np.zeros(state.shape)
# add experience to memory
self.memory.add((state, action, reward, next_state, done))
# start a new episode
state = self.env.reset()
state, self.stacked_frames = stack_frames(self.stacked_frames, state, True)
else:
# add experience to memory
self.memory.add((state, action, reward, next_state, done))
# our new state is now the next_state
state = next_state
# saver will help us save our model
self.saver = tf.train.Saver()
# setup tensorboard writer
self.writer = tf.summary.FileWriter("logs/")
# losses
tf.summary.scalar("Loss", self.DQNetwork.loss)
self.write_op = tf.summary.merge_all()
def predict_action(self, sess, explore_start, explore_stop, decay_rate, decay_step, state, actions):
# first we randomize a number
exp_exp_tradeoff = np.random.rand()
explore_probability = explore_stop + (explore_start - explore_stop) * np.exp(-decay_rate * decay_step)
if explore_probability > exp_exp_tradeoff:
# make a random action
choice = random.randint(1, len(self.possible_actions)) - 1
action = self.possible_actions[choice]
else:
# estimate the Qs values state
Qs = sess.run(self.DQNetwork.output, feed_dict={self.DQNetwork.inputs_: state.reshape((1, *state.shape))})
# take the biggest Q value (= best action)
choice = np.argmax(Qs)
action = self.possible_actions[choice]
return action, choice, explore_probability
def play_notebook(self):
import matplotlib.pyplot as plt
# imports to render env to gif
from JSAnimation.IPython_display import display_animation
from matplotlib import animation
from IPython.display import display
# http://mckinziebrandon.me/TensorflowNotebooks/2016/12/21/openai.html
def display_frames_as_gif(frames):
"""
Displays a list of frames as a gif, with controls
"""
#plt.figure(figsize=(frames[0].shape[1] / 72.0, frames[0].shape[0] / 72.0), dpi = 72)
patch = plt.imshow(frames[0])
plt.axis('off')
def animate(i):
patch.set_data(frames[i])
anim = animation.FuncAnimation(plt.gcf(), animate, frames = len(frames), interval=50)
display(display_animation(anim, default_mode='loop'))
frames = []
with tf.Session() as sess:
total_test_rewards = []
# Load the model
self.saver.restore(sess, "models/{0}.cpkt".format(self.level_name))
for episode in range(1):
total_rewards = 0
state = self.env.reset()
state, self.stacked_frames = stack_frames(self.stacked_frames, state, True)
print("****************************************************")
print("EPISODE ", episode)
while True:
# Reshape the state
state = state.reshape((1, *state_size))
# Get action from Q-network
# Estimate the Qs values state
Qs = sess.run(self.DQNetwork.output, feed_dict = {self.DQNetwork.inputs_: state})
# Take the biggest Q value (= the best action)
choice = np.argmax(Qs)
#Perform the action and get the next_state, reward, and done information
next_state, reward, done, _ = self.env.step(choice)
frames.append(self.env.render(mode = 'rgb_array'))
total_rewards += reward
if done:
print ("Score", total_rewards)
total_test_rewards.append(total_rewards)
break
next_state, self.stacked_frames = stack_frames(self.stacked_frames, next_state, False)
state = next_state
self.env.close()
display_frames_as_gif(frames)
def play(self):
with tf.Session() as sess:
total_test_rewards = []
# Load the model
self.saver.restore(sess, "models/{0}.cpkt".format(self.level_name))
#self.env = wrap_env(self.env)
for episode in range(1):
total_rewards = 0
state = self.env.reset()
state, self.stacked_frames = stack_frames(self.stacked_frames, state, True)
print("****************************************************")
print("EPISODE ", episode)
while True:
# Reshape the state
state = state.reshape((1, *state_size))
# Get action from Q-network
# Estimate the Qs values state
Qs = sess.run(self.DQNetwork.output, feed_dict = {self.DQNetwork.inputs_: state})
# Take the biggest Q value (= the best action)
choice = np.argmax(Qs)
#Perform the action and get the next_state, reward, and done information
next_state, reward, done, _ = self.env.step(choice)
self.env.render()
total_rewards += reward
if done:
print ("Score", total_rewards)
total_test_rewards.append(total_rewards)
break
next_state, self.stacked_frames = stack_frames(self.stacked_frames, next_state, False)
state = next_state
self.env.close()
def train(self):
with tf.Session() as sess:
# initialize the variables
sess.run(tf.global_variables_initializer())
# initialize decay rate (that will be used to reduce epsilon)
decay_step = 0
for episode in range(total_episodes):
# set step to 0
step = 0
# initialize rewards of episode
episode_rewards = []
# make a new episode and opserve the first state
state = self.env.reset()
# remember that stack frame function
state, self.stacked_frames = stack_frames(self.stacked_frames, state, True)
print("Episode:", episode)
while step < max_steps:
step += 1
#print("step:", step)
# increase decay_step
decay_step += 1
# predict an action
action, choice, explore_probability = self.predict_action(sess,
explore_start,
explore_stop,
decay_rate,
decay_step,
state,
self.possible_actions)
# perform the action and get the next_state, reward, and done information
next_state, reward, done, _ = self.env.step(choice)
if episode_render:
self.env.render()
# add the reward to total reward
episode_rewards.append(reward)
# the game is finished
if done:
print("done")
# the episode ends so no next state
next_state = np.zeros((110, 84), dtype=np.int)
next_state, self.stacked_frames = stack_frames(self.stacked_frames, next_state, False)
# set step = max_steps to end episode
step = max_steps
# get total reward of the episode
total_reward = np.sum(episode_rewards)
print("Episode:", episode,
"Total reward:", total_reward,
"Explore P:", explore_probability,
"Training Loss:", loss)
#rewards_list.append((episode, total_reward))
# store transition <s_i, a, r_{i+1}, s_{i+1}> in memory
self.memory.add((state, action, reward, next_state, done))
else:
# stack frame of the next state
next_state, self.stacked_frames = stack_frames(self.stacked_frames, next_state, False)
# store transition <s_i, a, r_{i+1}, s_{i+1}> in memory
self.memory.add((state, action, reward, next_state, done))
# s_{i} := s_{i+1}
state = next_state
### Learning part
# obtain random mini-batch from memory
batch = self.memory.sample(batch_size)
states_mb = np.array([each[0] for each in batch], ndmin=3)
actions_mb = np.array([each[1] for each in batch])
rewards_mb = np.array([each[2] for each in batch])
next_states_mb = np.array([each[3] for each in batch], ndmin=3)
dones_mb = np.array([each[4] for each in batch])
target_Qs_batch = []
# get Q values for next_state
Qs_next_state = sess.run(self.DQNetwork.output, feed_dict={self.DQNetwork.inputs_: next_states_mb})
# set Q_target = r if episode ends with s+1
for i in range(len(batch)):
terminal = dones_mb[i]
# if we are in a terminal state, only equals reward
if terminal:
target_Qs_batch.append(rewards_mb[i])
else:
target = rewards_mb[i] + gamma * np.max(Qs_next_state[i])
target_Qs_batch.append(target)
targets_mb = np.array([each for each in target_Qs_batch])
loss, _ = sess.run([self.DQNetwork.loss, self.DQNetwork.optimizer],
feed_dict={self.DQNetwork.inputs_: states_mb,
self.DQNetwork.target_Q: targets_mb,
self.DQNetwork.actions_: actions_mb})
# write tf summaries
summary = sess.run(self.write_op, feed_dict={self.DQNetwork.inputs_: states_mb,
self.DQNetwork.target_Q: targets_mb,
self.DQNetwork.actions_: actions_mb})
self.writer.add_summary(summary, episode)
self.writer.flush()
# save model every 5 episodes
if episode % 5 == 0:
self.saver.save(sess, "models/{0}.cpkt".format(self.level_name))
print("Model Saved")
def main2():
import gym
import copy
from utils import Memory
from utils import process_frame2
env = gym.make('BreakoutDeterministic-v4')
gc = gated_convolution2(shape=[None, 84, 84, 4],
nummap=128,
numfactors=128,
learning_rate=.001,
w=8,
s=1,
a_size=env.action_space.n)
mem = Memory(50000)
batch_size = 4
steps = 1
length = 4
action_space = env.action_space.n
with tf.Session() as sess:
sess.run(tf.global_variables_initializer())
while True:
s = env.reset()
s = process_frame2(s)
state = [s[..., np.newaxis]] * length
state_ = [s[..., np.newaxis]] * length
action = [-1] * length
done = False
while done == False:
#env.render()
a = np.random.randint(env.action_space.n)
s_, r, done, _ = env.step(a)
s_ = process_frame2(s_)
state_.pop(0)
action.pop(0)
state_.append(s_[..., np.newaxis])
action.append(a)
mem.add([
np.concatenate(state, axis=-1)[np.newaxis, ...],
np.array(action)[np.newaxis, ...],
np.concatenate(state_, axis=-1)[np.newaxis, ...]
])
if len(mem.mem) >= batch_size:
batch = mem.sample(batch_size)
#Do stuff
states = []
actions = []
states_ = []
for i in range(len(batch)):
states.append(batch[i][0])
actions.append(batch[i][1])
states_.append(batch[i][2])
states = np.concatenate(states, axis=0).astype(
np.float64) / 255.
actions = np.concatenate(actions, axis=0)
states_ = np.concatenate(states_, axis=0).astype(
np.float64) / 255.
_, recon_loss, recon_x, recon_y, recon_action_loss = gc.run2(
sess, states, actions, states_)
print 'steps:', steps, 'recon_loss:', recon_loss, 'recon_action_loss', recon_action_loss, 'main2'
steps += 1
if done == True:
break
def main():
parser = argparse.ArgumentParser()
parser.add_argument("--environment", type=str, default='CartPole-v0')
parser.add_argument("--action-size", type=int, default=2)
parser.add_argument("--input-shape", type=list, default=[None, 4])
parser.add_argument("--target-update-freq", type=int, default=200)
parser.add_argument("--epsilon-max", type=float, default=1.)
parser.add_argument("--epsilon-min", type=float, default=.01)
parser.add_argument("--epsilon-decay", type=float, default=.001)
parser.add_argument("--learning-rate", type=float, default=.99)
parser.add_argument("--batch-size", type=int, default=64)
parser.add_argument("--epochs", type=int, default=300)
parser.add_argument("--replay-mem-size", type=int, default=1000000)
args = parser.parse_args()
env = gym.make(args.environment)
args.action_size = env.action_space.n
args.input_shape = [None] + list(env.observation_space.shape)
print args
# Epsilon parameter
epsilon = args.epsilon_max
# Replay memory
memory = Memory(args.replay_mem_size)
# Time step
time_step = 0.
# Initialize the agent
qnet = qnetwork(input_shape=args.input_shape,
action_size=args.action_size,
scope='qnet')
tnet = qnetwork(input_shape=args.input_shape,
action_size=args.action_size,
scope='tnet')
update_ops = update_target_graph('qnet', 'tnet')
with tf.Session() as sess:
sess.run(tf.global_variables_initializer())
for epoch in range(args.epochs):
total_reward = 0
state = env.reset()
while True:
#env.render()
if np.random.rand() < epsilon:
action = np.random.randint(args.action_size)
else:
action = qnet.act(sess, state)
next_state, reward, done, _ = env.step(action)
total_reward += reward
# Add to memory
memory.add([state, action, reward, next_state, done])
# Reduce epsilon
time_step += 1.
epsilon = args.epsilon_min + (
args.epsilon_max - args.epsilon_min) * np.exp(
-args.epsilon_decay * time_step)
# Training step
batch = np.array(memory.sample(args.batch_size))
qnet.train(sess, batch, args.learning_rate, tnet)
# s <- s'
state = np.copy(next_state)
# Update target network
if int(time_step) % args.target_update_freq == 0:
sess.run(update_ops)
if done:
print 'epoch:', epoch, 'total_rewards:', total_reward
break
def main():
parser = argparse.ArgumentParser()
parser.add_argument("--environment", type=str, default='Pendulum-v0')
parser.add_argument("--action-dim", type=int, default=1)
parser.add_argument("--state-dim", type=int, default=1)
parser.add_argument("--input-shape", type=list, default=[None, 1])
parser.add_argument("--epochs", type=int, default=30000)
parser.add_argument('--tau',
help='soft target update parameter',
default=0.001)
parser.add_argument("--action-bound", type=float, default=1.)
parser.add_argument("--replay-mem-size", type=int, default=1000000)
parser.add_argument("--batch-size", type=int, default=64)
parser.add_argument("--gamma", type=float, default=.99)
parser.add_argument("--K",
type=int,
default=1,
help='The number of steps to train the environment')
parser.add_argument(
"--L",
type=int,
default=1,
help='The number of Q-learning steps for hypothetical rollouts')
parser.add_argument("--latent-size",
type=int,
default=4,
help='Size of vector for Z')
args = parser.parse_args()
# Initialize environment
env = gym.make(args.environment)
args.state_dim = env.observation_space.shape[0]
args.input_shape = [None, args.state_dim]
args.action_dim = env.action_space.shape[0]
#assert args.action_dim == 1
args.action_bound = env.action_space.high
print(args)
# Networks
actor_source = actor(state_shape=[None, args.state_dim],\
action_shape=[None, args.action_dim],\
output_bound=args.action_bound[0],\
scope='actor_source')
critic_source = critic(state_shape=[None, args.state_dim],\
action_shape=[None, args.action_dim],\
scope='critic_source')
actor_target = actor(state_shape=[None, args.state_dim],\
action_shape=[None, args.action_dim],\
output_bound=args.action_bound[0],\
scope='actor_target')
critic_target = critic(state_shape=[None, args.state_dim],\
action_shape=[None, args.action_dim],\
scope='critic_target')
# Initialize the GANs
cgan_state = CGAN(input_shape=args.input_shape,\
action_size=args.action_dim,\
latent_size=args.latent_size,\
gen_input_shape=args.input_shape,\
continuous_action=True)
cgan_reward = CGAN(input_shape=args.input_shape,\
action_size=args.action_dim,\
latent_size=args.latent_size,\
gen_input_shape=[None, 1],\
continuous_action=True)
# Update and copy operators
update_target_actor = update_target_graph2('actor_source', 'actor_target',
args.tau)
update_target_critic = update_target_graph2('critic_source',
'critic_target', args.tau)
copy_target_actor = update_target_graph2('actor_source', 'actor_target',
1.)
copy_target_critic = update_target_graph2('critic_source', 'critic_target',
1.)
# Replay memory
memory = Memory(args.replay_mem_size)
# Actor noise
actor_noise = OrnsteinUhlenbeckActionNoise(mu=np.zeros(args.action_dim))
with tf.Session() as sess:
sess.run(tf.global_variables_initializer())
sess.run(copy_target_critic)
sess.run(copy_target_actor)
for epoch in range(args.epochs):
state = env.reset()
total_rewards = 0.0
while True:
#env.render()
# Choose an action
action = sess.run(
actor_source.action,
feed_dict={actor_source.states: state[np.newaxis, ...]
})[0] + actor_noise()
# Execute action
state1, reward, done, _ = env.step(action)
total_rewards += float(reward)
# Store tuple in replay memory
memory.add([state[np.newaxis, ...],\
action[np.newaxis, ...],\
reward,\
state1[np.newaxis, ...],\
done])
# Training step: update actor critic using real experience
batch = np.array(memory.sample(args.batch_size))
assert len(batch) > 0
states = np.concatenate(batch[:, 0], axis=0)
actions = np.concatenate(batch[:, 1], axis=0)
rewards = batch[:, 2]
states1 = np.concatenate(batch[:, 3], axis=0)
dones = batch[:, 4]
# Update the critic
actions1 = sess.run(actor_target.action,\
feed_dict={actor_target.states:states1})
targetQ = np.squeeze(sess.run(critic_target.Q,\
feed_dict={critic_target.states:states1,\
critic_target.actions:actions1}), axis=-1)
targetQ = rewards + (
1. - dones.astype(np.float32)) * args.gamma * targetQ
targetQ = targetQ[..., np.newaxis]
_, critic_loss = sess.run([critic_source.critic_solver,\
critic_source.loss],\
feed_dict={critic_source.states:states,\
critic_source.actions:actions,\
critic_source.targetQ:targetQ})
# Update the actor
critic_grads = sess.run(critic_source.grads,\
feed_dict={critic_source.states:states,\
critic_source.actions:actions})[0]# Grab gradients from critic
_ = sess.run(actor_source.opt,\
feed_dict={actor_source.states:states,\
actor_source.dQ_by_da:critic_grads})
# Update target networks
sess.run(update_target_critic)
sess.run(update_target_actor)
# Training step: update the environment model using real experience (i.e., update the conditional GANs)
for k in range(args.K):
batch = np.array(memory.sample(args.batch_size))
states = np.concatenate(batch[:, 0], axis=0)
actions = np.concatenate(batch[:, 1], axis=0)
rewards = batch[:, 2]
states1 = np.concatenate(batch[:, 3], axis=0)
_, D_loss_state = sess.run([cgan_state.D_solver, cgan_state.D_loss],\
feed_dict={cgan_state.states:states,\
cgan_state.actions:actions,\
cgan_state.Z:sample_z(len(batch),\
args.latent_size),\
cgan_state.X:states1})
_, G_loss_state = sess.run([cgan_state.G_solver,\
cgan_state.G_loss],\
feed_dict={cgan_state.states:states,\
cgan_state.actions:actions,\
cgan_state.Z:sample_z(len(batch),\
args.latent_size)})
_, D_loss_reward = sess.run([cgan_reward.D_solver,\
cgan_reward.D_loss],\
feed_dict={cgan_reward.states:states,\
cgan_reward.actions:actions,\
cgan_reward.Z:sample_z(len(batch),\
args.latent_size),\
cgan_reward.X:rewards[..., np.newaxis]})
_, G_loss_reward = sess.run([cgan_reward.G_solver,\
cgan_reward.G_loss],\
feed_dict={cgan_reward.states:states,\
cgan_reward.actions:actions,\
cgan_reward.Z:sample_z(len(batch),\
args.latent_size)})
#print D_loss_state, G_loss_state, D_loss_reward, G_loss_state
# Training step: update actor critic using imagination rollouts
for l in range(args.L):
batch = np.array(memory.sample(args.batch_size))
states_ = np.concatenate(batch[:, 3], axis=0)
actions = np.random.uniform(env.action_space.low[0],\
env.action_space.high[0],\
size=(len(batch),\
env.action_space.shape[0]))
dones = np.array([False] * len(batch))
G_sample_state = sess.run(cgan_state.G_sample,\
feed_dict={cgan_state.states:states_,\
cgan_state.actions:actions,\
cgan_state.Z:sample_z(len(batch),\
args.latent_size)})
G_sample_reward = sess.run(cgan_reward.G_sample,\
feed_dict={cgan_reward.states:states_,\
cgan_reward.actions:actions,\
cgan_reward.Z:sample_z(len(batch),\
args.latent_size)})
G_sample_reward = np.squeeze(G_sample_reward, axis=-1)
# Update the critic
actions1 = sess.run(actor_target.action,\
feed_dict={actor_target.states:G_sample_state})
targetQ = np.squeeze(sess.run(critic_target.Q,\
feed_dict={critic_target.states:G_sample_state,\
critic_target.actions:actions1}), axis=-1)
targetQ = G_sample_reward + (
1. - dones.astype(np.float32)) * args.gamma * targetQ
targetQ = targetQ[..., np.newaxis]
_, critic_loss = sess.run([critic_source.critic_solver,\
critic_source.loss],\
feed_dict={critic_source.states:states_,\
critic_source.actions:actions,\
critic_source.targetQ:targetQ})
# Update the actor
critic_grads = sess.run(critic_source.grads,\
feed_dict={critic_source.states:states_,\
critic_source.actions:actions})[0]# Grab gradients from critic
_ = sess.run(actor_source.opt,\
feed_dict={actor_source.states:states_,\
actor_source.dQ_by_da:critic_grads})
# Update target networks
sess.run(update_target_critic)
sess.run(update_target_actor)
state = np.copy(state1)
if done == True:
print 'epoch', epoch, 'total rewards', total_rewards
break
def main():
import gym
import sys
import copy
sys.path.append('../..')
from utils import Memory
#env = gym.make('LunarLander-v2')
env = gym.make('Pendulum-v0')
#env = gym.make('CartPole-v0')
mem = Memory(1000000)
batch_size = 32
try:
a_size = env.action_space.n
a_type = 'discrete'
except:
try:
a_size = env.action_space.shape[0]
a_type = 'continuous'
except:
raise ValueError('Cannot find action size.')
emg = gated_env_modeler(s_shape=[None, env.observation_space.shape[0]],
a_size=a_size,
out_shape=[None, env.observation_space.shape[0]],
a_type=a_type,
numfactors=256)
#emg = gated_env_modeler(s_shape=[None, env.observation_space.shape[0]], a_size=a_size, out_shape=[None, 1], a_type=a_type, numfactors=256)
with tf.Session() as sess:
sess.run(tf.global_variables_initializer())
while True:
s = env.reset()
done = False
while done == False:
#env.render()
#a = np.random.randint(a_size)
a = random_action(a_size, a_type)
s_, r, done, _ = env.step(a)
mem.add([s, a, r, s_, done])
batch = mem.sample(batch_size)
if len(batch) == batch_size:
states = []
actions = []
rewards = []
states_ = []
for i in range(batch_size):
states.append(batch[i][0])
actions.append(batch[i][1])
rewards.append(batch[i][2])
states_.append(batch[i][3])
states = np.stack(states, axis=0)
actions = np.stack(actions, axis=0)
rewards = np.stack(rewards, axis=0)
states_ = np.stack(states_, axis=0)
#_, loss_s, loss_a, loss_s_, loss = sess.run([emg.update_model, emg.loss_s, emg.loss_a, emg.loss_s_, emg.loss], feed_dict={emg.states:states, emg.states_:rewards[..., np.newaxis], emg.actions_placeholder:actions})
_, loss_s, loss_a, loss_s_, loss = sess.run(
[
emg.update_model, emg.loss_s, emg.loss_a,
emg.loss_s_, emg.loss
],
feed_dict={
emg.states: states,
emg.states_: states_,
emg.actions_placeholder: actions
})
print 'loss_s', loss_s, 'loss_a', loss_a, 'loss_s_', loss_s_, 'loss', loss
s = copy.deepcopy(s_)
if done == True:
break
def main():
parser = argparse.ArgumentParser()
parser.add_argument("--no-samples", type=int, default=50)
parser.add_argument("--unroll-steps", type=int, default=20)
parser.add_argument("--replay-mem-size", type=int, default=200)
parser.add_argument("--batch-size", type=int, default=64)
parser.add_argument("--pretrain-epochs", type=int, default=100)
args = parser.parse_args()
print args
env = gym.make('Pendulum-v0')
# Initialize the agent
psb = policy_search_bayesian(
state_dim=env.observation_space.shape[0],
action_dim=env.action_space.shape[0],
observation_space_low=env.observation_space.low,
observation_space_high=env.observation_space.high,
no_basis=(6**4) + 1,
action_bound_low=env.action_space.low,
action_bound_high=env.action_space.high,
unroll_steps=args.unroll_steps,
no_samples=args.no_samples,
discount_factor=.9)
# Initialize the memory
memory = Memory(args.replay_mem_size)
with tf.Session() as sess:
sess.run(tf.global_variables_initializer())
#psb.pretrain(sess, args.pretrain_epochs)
state = env.reset()
total_rewards = 0.0
epoch = 1
#batch = []
for time_steps in range(30000):
#env.render()
# Get action and step in environment
action = psb.act(sess, state, epoch)
next_state, reward, done, _ = env.step(action)
total_rewards += float(reward)
# Append to the batch
memory.add([
np.atleast_2d(state),
np.atleast_2d(action), reward,
np.atleast_2d(next_state), done
])
#batch.append([state, action, reward, next_state, done])
# Training step
batch = memory.sample(args.batch_size)
states = np.concatenate([b[0] for b in batch], axis=0)
#psb.train2(sess, states)
psb.train_policy(sess, states, epoch)
# s <- s'
state = np.copy(next_state)
if done == True:
print 'time steps', time_steps, 'epoch', epoch, 'total rewards', total_rewards
epoch += 1
total_rewards = 0.
'''
B = batch
states = np.stack([b[0] for b in B], axis=0)
actions = np.stack([b[1] for b in B], axis=0)
rewards = np.array([b[2] for b in B])
next_states = np.stack([b[3] for b in B], axis=0)
dones = np.array([float(b[4]) for b in B])
psb.train_dynamics(sess, states, actions, next_states)
psb.visualize_trajectories2(sess)
psb.visualize_trajectories(sess)
#psb.train_policy(sess, states, epoch)
batch = []
'''
state = env.reset()
