def __init__(self, state_size, action_size, seed, is_prioritized_sample=False):
'''Initialize an Agent.
Params
======
state_size (int): the dimension of the state
action_size (int): the number of actions
seed (int): random seed
'''
self.state_size = state_size
self.action_size = action_size
self.seed = random.seed(seed)
self.t_step = 0 # Initialize time step (for tracking LEARN_EVERY_STEP and UPDATE_EVERY_STEP)
self.is_prioritized_sample = is_prioritized_sample
self.qnetwork_local = QNetwork(self.state_size, self.action_size, seed).to(device)
self.qnetowrk_target = QNetwork(self.state_size, self.action_size, seed).to(device)
self.optimizer = optim.Adam(self.qnetwork_local.parameters(), lr=LR)
if self.is_prioritized_sample == False:
self.replay_memory = ReplayMemory(BATCH_SIZE, BUFFER_SIZE, seed)
else:
self.replay_memory = PrioritizedReplayMemory(BATCH_SIZE, BUFFER_SIZE, seed)
def __init__(self, sess, s_size, a_size, scope, queues, trainer):
self.queue = queues[0]
self.param_queue = queues[1]
self.replaymemory = ReplayMemory(100000)
self.sess = sess
self.learner_net = network(s_size, a_size, scope, 20)
self.q = self.learner_net.q
self.Q = self.learner_net.Q
self.actions_q = tf.placeholder(shape=[None, a_size, N],
dtype=tf.float32)
self.q_target = tf.placeholder(shape=[None, N], dtype=tf.float32)
self.ISWeights = tf.placeholder(shape=[None, N], dtype=tf.float32)
self.q_actiona = tf.multiply(self.q, self.actions_q)
self.q_action = tf.reduce_sum(self.q_actiona, axis=1)
self.u = tf.abs(self.q_target - self.q_action)
self.loss = tf.reduce_mean(
tf.reduce_sum(tf.square(self.u) * self.ISWeights, axis=1))
self.local_vars = self.learner_net.local_vars #tf.get_collection(tf.GraphKeys.TRAINABLE_VARIABLES, scope)
self.gradients = tf.gradients(self.loss, self.local_vars)
#grads,self.grad_norms = tf.clip_by_norm(self.gradients,40.0)
self.apply_grads = trainer.apply_gradients(
zip(self.gradients, self.local_vars))
self.sess.run(tf.global_variables_initializer())
def __init__(self, policy_net, target_net, durability, optimizer, name,
constants):
"""An agent class that takes action on the environment and optimizes
the action based on the reward.
Parameters
----------
policy_net : DQN
[description]
target_net : DQN
[description]
durability : int
[description]
optimizer : [type]
[description]
name : str
The name of agent
constants: Constants
The hyper-parameters from Constants class
"""
self.CONSTANTS = constants
self.policy_net = policy_net
self.target_net = target_net
self.target_net.load_state_dict(policy_net.state_dict())
self.durability = durability
self.optimizer = optimizer
self.name = name
self.memory = ReplayMemory(self.CONSTANTS.MEMORY_SIZE)
self.steps_done = 0
self.total_reward = 0.0
self.reward = 0.0
self.obtained_reward = 0.0
self.n_best = 0
self.policy_net_flag = False
def __init__(self, env, mode, pre_trained_model, tensorboard_writer=None):
super(DQNAgent, self).__init__(env, mode, tensorboard_writer)
self.agent_name = 'DQN' + str(self.agent_no)
self.memory = ReplayMemory()
self.network = DeepQNetwork(self.obs_space[0], self.action_space)
if self.mode == 'play':
self.network.load_params(pre_trained_model)
self.network.eval()
elif self.mode == 'train':
self.eval_network = DeepQNetwork(self.obs_space[0],
self.action_space)
self.eval_network.eval()
if pre_trained_model:
self.eval_network.load_params(pre_trained_model)
self.optimizer = optim.RMSprop(self.network.parameters(), lr=LR)
self.loss_func = SmoothL1Loss()
else:
raise ValueError(
'Please set a valid mode for the agent (play or train)')
def __init__(self,
load_checkpoint,
n_states,
n_actions,
checkpoint_file,
mem_size=10**6,
batch_size=64,
n_hid1=400,
n_hid2=300,
alpha=1e-4,
beta=1e-3,
gamma=0.99,
tau=0.99):
self.batch_size = batch_size
self.gamma = gamma
self.tau = tau
self.actor = ActorNetwork(n_states,
n_actions,
n_hid1,
n_hid2,
alpha,
checkpoint_file,
name='actor')
self.critic = CriticNetwork(n_states,
n_actions,
n_hid1,
n_hid2,
beta,
checkpoint_file,
name='critic')
self.actor_target = ActorNetwork(n_states,
n_actions,
n_hid1,
n_hid2,
alpha,
checkpoint_file,
name='actor_target')
self.critic_target = CriticNetwork(n_states,
n_actions,
n_hid1,
n_hid2,
beta,
checkpoint_file,
name='critic_target')
self.noise = OUActionNoise(mu=np.zeros(n_actions))
self.memory = ReplayMemory(mem_size, n_states, n_actions)
self.update_network_parameters_phil(tau=1)
if load_checkpoint:
self.actor.eval()
self.load_checkpoint = load_checkpoint
def main(game, episodes, training_mode=False, log=False, no_ops=30):
env = gym.make(game)
num_actions = env.action_space.n
dqn = DeepQNetwork(num_actions, (4, 84, 84))
replay = ReplayMemory(100000)
obs = env.reset()
h, w, c = obs.shape
phi = Phi(4, 84, 84, c, h, w)
agent = Agent(replay, dqn, training_mode=training_mode)
stats = Stats('results/results.csv')
for i_episode in range(episodes):
env.reset()
for i in range(random.randint(1, no_ops)):
observation, _, _, _ = env.step(0)
pre_state = phi.add(observation)
game_score = 0
done = False
t = 0
while not done:
t += 1
env.render()
action = agent.get_action(pre_state)
observation, reward, done, _ = env.step(action)
post_state = phi.add(observation)
if training_mode:
agent.update_replay_memory(pre_state, action, reward,
post_state, done)
if agent.time_step > agent.replay_start_size:
stats.log_time_step(agent.get_loss())
pre_state = post_state
game_score += reward
print("Episode {} finished after {} time steps with score {}".format(
i_episode, t, game_score))
phi.reset()
if agent.time_step > agent.replay_start_size:
stats.log_game(game_score, t)
stats.close()
if log:
dqn.save_model('results/model_weights.hdf5')
def __init__(self, env, name, s_size, a_size, trainer, model_path,
global_episodes):
self.name = "worker_" + str(name)
self.number = name
self.model_path = model_path
self.trainer = trainer
self.global_episodes = global_episodes
self.increment = self.global_episodes.assign_add(1)
self.episode_rewards = []
self.episode_lengths = []
self.episode_mean_values = []
#Create the local copy of the network and the tensorflow op to copy global paramters to local network
self.local_Q = Q_Network(s_size, a_size, self.name, trainer)
self.update_local_ops = update_target_graph('global', self.name)
self.env = env
self.replaymemory = ReplayMemory(max_memory)
def main():
game = FlappyBird()
env = PLE(game, fps=30, display_screen=False)
env_evaluate = PLE(game, fps=30, display_screen=False)
obs_dim = len(env.getGameState())
action_dim = 2 # 只能是up键，还有一个其它，所以是2
# rpm = ReplayMemory(MEMORY_SIZE, obs_dim, action_dim)
rpm = ReplayMemory(MEMORY_SIZE)
model = Model(act_dim=action_dim)
algorithm = parl.algorithms.DQN(model,
act_dim=action_dim,
gamma=GAMMA,
lr=LEARNING_RATE)
agent = Agent(
algorithm,
obs_dim=obs_dim,
act_dim=action_dim,
e_greed=0.2, # explore
e_greed_decrement=1e-6
) # probability of exploring is decreasing during training
if os.path.exists('./model_dir'):
agent.restore('./model_dir')
# while rpm.size() < MEMORY_WARMUP_SIZE: # warm up replay memory
while len(rpm) < MEMORY_WARMUP_SIZE: # warm up replay memory
run_episode(agent, env, rpm)
max_episode = 5000
# start train
episode = 0
while episode < max_episode:
# train part
for i in range(0, 50):
total_reward = run_episode(agent, env, rpm)
episode += 1
eval_reward = evaluate(agent, env_evaluate)
logger.info('episode:{} test_reward:{}'.format(
episode, eval_reward))
agent.save('./model_dir')
def __init__(self, num_states, num_actions, Double, Dueling, PER):
self.num_actions = num_actions # 행동 가짓수(2)를 구함
self.Double = Double
self.Dueling = Dueling
self.PER = PER
# transition을 기억하기 위한 메모리 객체 생성
self.memory = ReplayMemory(CAPACITY)
# 신경망 구성
n_in, n_mid, n_out = num_states, 32, num_actions
self.main_q_network = Net(n_in, n_mid, n_out, Dueling) # Net 클래스를 사용
self.target_q_network = Net(n_in, n_mid, n_out, Dueling) # Net 클래스를 사용
print(self.main_q_network) # 신경망의 구조를 출력
# 최적화 기법을 선택
self.optimizer = optim.Adam(self.main_q_network.parameters(), lr=0.0001)
# PER - TD 오차를 기억하기 위한 메모리 객체 생성
if self.PER == True:
self.td_error_memory = TDerrorMemory(CAPACITY)
def __init__(self, dim):
self.critic_path = cst.CN_CKPT_PATH
self.actor_path = cst.AN_CKPT_PATH
self.replaymemory_path = cst.RM_PATH
self.dim_body = dim[0]
self.dim_sensor = dim[1]
self.dim_state = dim[0] + dim[1] * 3
self.dim_action = dim[2]
self.sess = tf.InteractiveSession()
self.act_lr = cst.ACT_LEARNING_RATE
self.cri_lr = cst.CRI_LEARNING_RATE
self.tau = cst.TAU
self.batch_size = cst.BATCH_SIZE
self.gamma = cst.REWARD_DECAY
self.actorNN = ActorNetwork(self.sess, self.dim_state, self.dim_action,
self.act_lr, self.tau, self.batch_size)
self.criticNN = CriticNetwork(self.sess, self.dim_state,
self.dim_action, self.cri_lr, self.tau,
self.gamma,
self.actorNN.get_num_trainable_vars())
self.sess.run(tf.global_variables_initializer())
self.actorNN.update_target_network()
self.criticNN.update_target_network()
self.rm = ReplayMemory('DDPG')
self.agent_count = cst.AGENT_COUNT
self.exploration_rate = cst.EXPLORATION_RATE
self.epsilon = cst.CRITIC_EPSILON
self.LOSS_ITERATION = cst.LOSS_ITERATION
self.expl_noise = OUNoise(self.dim_action)
self.expl = False
self.expl_decay = cst.EXPLORATION_DECAY
N_EPOCHS = 4
N_SAMPLES = 1000
SAMPLE_LENGTH = 15
memory_capacity = 2000
GAMMA = .997
LAMBDA = .95
EPSILON = .2
TARGET_DISCOUNT = .4
N_TIMESTEPS_PER_UPDATE = 300
# ~~~~~~~~~~~~~~~~~~
# Initialization
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
env = gym.make('CartPole-v1')
replay_memory = ReplayMemory(memory_capacity)
policy_net = Actor(sum(env.observation_space.shape), 200, env.action_space.n)
value_net = Critic(sum(env.observation_space.shape), 200, 1)
target_value_net = Critic(sum(env.observation_space.shape), 200, 1)
target_value_net.load_state_dict(value_net.state_dict())
target_value_net.eval()
params = list(policy_net.parameters()) + list(value_net.parameters())
optimizer = optim.SGD(params, lr=1e-3, momentum=.9, weight_decay=1e-6)
writer = SummaryWriter()
reward_normalizer = RewardNormalizer()
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
def __init__(self,
load_checkpoint,
checkpoint_file,
env,
n_states,
n_actions,
update_actor_interval=2,
warmup=1000,
mem_size=10**6,
batch_size=100,
n_hid1=400,
n_hid2=300,
lr_alpha=1e-3,
lr_beta=1e-3,
gamma=0.99,
tau=5e-3,
noise_mean=0,
noise_sigma=0.1):
self.load_checkpoint = load_checkpoint
self.checkpoint_file = checkpoint_file
# needed for clamping in the learn function
self.env = env
self.max_action = float(env.action_space.high[0])
self.low_action = float(env.action_space.low[0])
self.n_actions = n_actions
# to keep track of how often we call "learn" function, for the actor network
self.learn_step_counter = 0
# to handle countdown to the end of the warmup period, incremented every time we call an action
self.time_step = 0
self.update_actor_interval = update_actor_interval
self.warmup = warmup
self.gamma = gamma
self.tau = tau
self.batch_size = batch_size
self.noise_mean = noise_mean
self.noise_sigma = noise_sigma
self.actor = TD3ActorNetwork(n_states,
n_actions,
n_hid1,
n_hid2,
lr_alpha,
checkpoint_file,
name='actor')
self.target_actor = TD3ActorNetwork(n_states,
n_actions,
n_hid1,
n_hid2,
lr_alpha,
checkpoint_file,
name='target_actor')
self.critic_1 = TD3CriticNetwork(n_states,
n_actions,
n_hid1,
n_hid2,
lr_beta,
checkpoint_file,
name='critic_1')
self.critic_2 = TD3CriticNetwork(n_states,
n_actions,
n_hid1,
n_hid2,
lr_beta,
checkpoint_file,
name='critic_2')
self.target_critic_1 = TD3CriticNetwork(n_states,
n_actions,
n_hid1,
n_hid2,
lr_beta,
checkpoint_file,
name='target_critic_1')
self.target_critic_2 = TD3CriticNetwork(n_states,
n_actions,
n_hid1,
n_hid2,
lr_beta,
checkpoint_file,
name='target_critic_2')
self.memory = ReplayMemory(mem_size, n_states, n_actions)
# tau=1 perform an exact copy of the networks to the respective targets
# self.update_network_parameters(tau=1)
self.update_network_parameters(self.actor, self.target_actor, tau=1)
self.update_network_parameters(self.critic_1,
self.target_critic_1,
tau=1)
self.update_network_parameters(self.critic_2,
self.target_critic_2,
tau=1)
image_dimensions = 210 * 160 * 3
num_episodes = 50
target_episode_update = 5
action_threshold = 250
train_batch_size = 64
GAMMA = 0.999
EPS_START = 0.9
EPS_END = 0.05
EPS_DECAY = 200
steps_done = 0
n_actions = env.action_space.n
screen_height = 210
screen_width = 160
memory = ReplayMemory(10000)
policy_net = DQN(screen_height, screen_width, n_actions).to(device)
target_net = DQN(screen_height, screen_width, n_actions).to(device)
target_net.eval()
optimizer = optim.RMSprop(policy_net.parameters())
def optimize_model():
if len(memory) < train_batch_size:
return
transitions = memory.sample(train_batch_size)
print('Training on:', len(transitions))
def __init__(self,
game,
mem_size = 1000000,
state_buffer_size = 4,
batch_size = 64,
learning_rate = 1e-5,
pretrained_model = None,
frameskip = 4
):
"""
Inputs:
- game: string to select the game
- mem_size: int length of the replay memory
- state_buffer_size: int number of recent frames used as input for neural network
- batch_size: int
- learning_rate: float
- pretrained_model: str path to the model
- record: boolean to enable record option
"""
# Namestring
self.game = game
# Environment
self.env = Environment(game_name[game], dimensions[game], frameskip=frameskip)
# Cuda
self.use_cuda = torch.cuda.is_available()
# Neural network
self.net = DQN(channels_in = state_buffer_size,
num_actions = self.env.get_number_of_actions())
self.target_net = DQN(channels_in = state_buffer_size,
num_actions = self.env.get_number_of_actions())
if self.use_cuda:
self.net.cuda()
self.target_net.cuda()
if pretrained_model:
self.net.load(pretrained_model)
self.target_net.load(pretrained_model)
self.pretrained_model = True
else:
self.pretrained_model = False
# Optimizer
self.learning_rate = learning_rate
self.optimizer = optim.Adam(self.net.parameters(), lr=learning_rate)
#self.optimizer = optim.RMSprop(self.net.parameters(), lr=learning_rate,alpha=0.95, eps=0.01)
self.batch_size = batch_size
self.optimize_each_k = 1
self.update_target_net_each_k_steps = 10000
self.noops_count = 0
# Replay Memory (Long term memory)
self.replay = ReplayMemory(capacity=mem_size, num_history_frames=state_buffer_size)
self.mem_size = mem_size
# Fill replay memory before training
if not self.pretrained_model:
self.start_train_after = 50000
else:
self.start_train_after = mem_size//2
# Buffer for the most recent states (Short term memory)
self.num_stored_frames = state_buffer_size
# Steps
self.steps = 0
# Save net
self.save_net_each_k_episodes = 500
def __init__(
self,
game,
mem_size=512 * 512, #1024*512,
state_buffer_size=4,
batch_size=64,
learning_rate=1e-5,
pretrained_model=None,
frameskip=4, #1
record=False):
"""
Inputs:
- game: string to select the game
- mem_size: int length of the replay memory
- state_buffer_size: int number of recent frames used as input for neural network
- batch_size: int
- learning_rate: float
- pretrained_model: str path to the model
- record: boolean to enable record option
"""
# Namestring
self.game = game
# dimensions: tuple (h1,h2,w1,w2) with dimensions of the game (to crop borders)
#if self.game == 'Breakout-v0':
# dimensions = (32, 195, 8, 152)
#elif self.game == 'SpaceInvaders-v0':
# dimensions = (21, 195, 20, 141)
#elif self.game == 'Assault-v0':
# dimensions = (50, 240, 5, 155)
#elif self.game == 'Phoenix-v0':
# dimensions = (23, 183, 0, 160)
#elif self.game == 'Skiing-v0':
# dimensions = (55, 202, 8, 152)
#elif self.game == 'Enduro-v0':
# dimensions = (50, 154, 8, 160)
#elif self.game == 'BeamRider-v0':
# dimensions = (32, 180, 9, 159)
if self.game == 'BreakoutAndSpace':
dimensions_break = (32, 195, 8, 152)
dimensions_space = (21, 195, 20, 141)
elif self.game != 'BreakoutAndSpace':
print(
'Error! This version is for playing BreakOut and SpaceInvaders at the same time.'
)
# Environment
self.env_break = Environment('BreakoutNoFrameskip-v4',
dimensions_break,
frameskip=frameskip)
self.env_space = Environment('SpaceInvaders-v0',
dimensions_space,
frameskip=frameskip)
# Cuda
self.use_cuda = torch.cuda.is_available()
# Neural network
self.net = DQN(channels_in=state_buffer_size,
num_actions=self.env_space.get_number_of_actions())
self.target_net = DQN(
channels_in=state_buffer_size,
num_actions=self.env_space.get_number_of_actions())
if self.use_cuda:
self.net.cuda()
self.target_net.cuda()
if pretrained_model:
self.net.load(pretrained_model)
self.target_net.load(pretrained_model)
self.pretrained_model = True
else:
self.pretrained_model = False
# Optimizer
self.learning_rate = learning_rate
self.optimizer = optim.Adam(self.net.parameters(), lr=learning_rate)
#self.optimizer = optim.RMSprop(self.net.parameters(), lr = 0.00025,alpha=0.95, eps=0.01)
self.batch_size = batch_size
self.optimize_each_k = 4
self.update_target_net_each_k_steps = 10000
self.noops_count = 0
# Replay Memory (Long term memory)
self.replay = ReplayMemory(capacity=mem_size,
num_history_frames=state_buffer_size)
self.mem_size = mem_size
# Fill replay memory before training
if not self.pretrained_model:
self.start_train_after = 25000
else:
self.start_train_after = mem_size // 2
# Buffer for the most recent states (Short term memory)
self.num_stored_frames = state_buffer_size
# Steps
self.steps = 0
# Save net
self.save_net_each_k_episodes = 500
EPISODES = 500
START_RANDOM = False
MAX_EPISODE_COUNTER = 3600 * 24 * 2.0 / PERIOD
ACTION_DIM = 1
STATE_DIM = 6
ACTION_MAX = 1.0
MAX_BUFFER = 100000
MAX_TOTAL_REWARD = 300
EPISODE_PLOT = 25
# -------------------------------------------- #
# LOAD USEFULL CLASSES.
# -------------------------------------------- #
# Load the memroy
memory = ReplayMemory(MAX_BUFFER)
# Load the environment.
env = Environment(FILENAME, QUOTE_QTY, TRADE_QTY)
# Load the trainer.
trainer = Trainer(STATE_DIM, ACTION_DIM, ACTION_MAX, memory)
# Load the window.
window = Window(LOOK_BACK)
window.add_norm("#t", method="log_change", ref="close_price_#t")
# Load the tensorboard writer.
writer = SummaryWriter("tensorboard/runs")
# -------------------------------------------- #
def __init__(self, game, agent_type, display, load_model, record, test):
self.name = game
self.agent_type = agent_type
self.ale = ALEInterface()
self.ale.setInt(str.encode('random_seed'), np.random.randint(100))
self.ale.setBool(str.encode('display_screen'), display or record)
if record:
self.ale.setString(str.encode('record_screen_dir'), str.encode('./data/recordings/{}/{}/tmp/'.format(game, agent_type)))
self.ale.loadROM(str.encode('./roms/{}.bin'.format(self.name)))
self.action_list = list(self.ale.getMinimalActionSet())
self.frame_shape = np.squeeze(self.ale.getScreenGrayscale()).shape
if test:
self.name += '_test'
if 'space_invaders' in self.name:
# Account for blinking bullets
self.frameskip = 2
else:
self.frameskip = 3
self.frame_buffer = deque(maxlen=4)
if load_model and not record:
self.load_replaymemory()
else:
self.replay_memory = ReplayMemory(500000, 32)
model_input_shape = self.frame_shape + (4,)
model_output_shape = len(self.action_list)
if agent_type == 'dqn':
self.model = DeepQN(
model_input_shape,
model_output_shape,
self.action_list,
self.replay_memory,
self.name,
load_model
)
elif agent_type == 'double':
self.model = DoubleDQN(
model_input_shape,
model_output_shape,
self.action_list,
self.replay_memory,
self.name,
load_model
)
else:
self.model = DuelingDQN(
model_input_shape,
model_output_shape,
self.action_list,
self.replay_memory,
self.name,
load_model
)
print('{} Loaded!'.format(' '.join(self.name.split('_')).title()))
print('Displaying: ', display)
print('Frame Shape: ', self.frame_shape)
print('Frame Skip: ', self.frameskip)
print('Action Set: ', self.action_list)
print('Model Input Shape: ', model_input_shape)
print('Model Output Shape: ', model_output_shape)
print('Agent: ', agent_type)
if not os.path.exists(model_path):
os.makedirs(model_path)
env = get_env(task)
a_size = env.action_space.n
global_episodes = tf.Variable(0,
dtype=tf.int32,
name='global_episodes',
trainable=False)
trainer = tf.train.AdamOptimizer(learning_rate=0.00015)
num_workers = 4
batch_size = 10
max_memory = 300000
replaymemory = ReplayMemory(max_memory)
saver = tf.train.Saver(max_to_keep=5)
lock = threading.Lock()
with tf.Session() as sess:
UPDATE_EVENT, ROLLING_EVENT = threading.Event(), threading.Event()
UPDATE_EVENT.clear()
ROLLING_EVENT.set()
GLOBAL_STEP = 0
coord = tf.train.Coordinator()
master_network = Apex_Network(sess, s_size, a_size, 'global', trainer)
workers = []
for i in range(num_workers):
env = get_env(task)
workers.append(
def __init__(self,
load_checkpoint,
checkpoint_file,
env,
n_states,
n_actions,
mem_size=10**6,
batch_size=256,
n_hid1=256,
n_hid2=256,
lr=3e-4,
gamma=0.99,
tau=5e-3,
reward_scale=2):
self.load_checkpoint = load_checkpoint
self.max_action = float(env.action_space.high[0])
self.low_action = float(env.action_space.low[0])
self.batch_size = batch_size
self.gamma = gamma
self.tau = tau
self.reward_scale = reward_scale
self.memory_counter = 0
self.memory = ReplayMemory(mem_size, n_states, n_actions)
self.actor = ActorNetwork(n_states,
n_actions,
n_hid1,
n_hid2,
self.max_action,
lr,
checkpoint_file,
name='_actor')
self.critic_1 = CriticNetwork(n_states,
n_actions,
n_hid1,
n_hid2,
lr,
checkpoint_file,
name='_crtic1')
self.critic_2 = CriticNetwork(n_states,
n_actions,
n_hid1,
n_hid2,
lr,
checkpoint_file,
name='_crtic2')
self.value_net = ValueNetwork(n_states,
n_hid1,
n_hid2,
lr,
checkpoint_file,
name='_value')
self.target_value_net = ValueNetwork(n_states,
n_hid1,
n_hid2,
lr,
checkpoint_file,
name='_value_target')
# tau=1 performs an exact copy of the networks to the respective targets
# self.update_network_parameters(tau=1)
self.update_network_parameters(self.value_net,
self.target_value_net,
tau=1)
def __init__(self,
game1,
game2,
mem_size = 1000000,
state_buffer_size = 4,
batch_size = 64,
learning_rate = 1e-5,
pretrained_model = None,
pretrained_subnet1 = False,
pretrained_subnet2 = False,
frameskip = 4,
frozen = False
):
"""
Inputs:
- game 1: string to select the game 1
- game 2: string to select the game 2
- mem_size: int length of the replay memory
- state_buffer_size: int number of recent frames used as input for neural network
- batch_size: int
- learning_rate: float
- pretrained_model: str path to the model
- pretrained_subnet1: str path to the model of the subnet
- pretrained_subnet2: str path to the model of the subnet
- frozen: boolean freeze pretrained subnets
"""
# Namestring
self.game1 = game1
self.game2 = game2
# Environment
self.env1 = Environment(game_name[game1], dimensions[game1], frameskip=frameskip)
self.env2 = Environment(game_name[game2], dimensions[game2], frameskip=frameskip)
# Neural net
self.pretrained_subnet1 = pretrained_subnet1
self.pretrained_subnet2 = pretrained_subnet2
self.net = TwinDQN(channels_in = state_buffer_size,
num_actions = self.env2.get_number_of_actions(),
pretrained_subnet1 = pretrained_subnet1,
pretrained_subnet2 = pretrained_subnet2,
frozen = frozen)
self.target_net = TwinDQN(channels_in = state_buffer_size,
num_actions = self.env2.get_number_of_actions(),
pretrained_subnet1 = pretrained_subnet1,
pretrained_subnet2 = pretrained_subnet2,
frozen = frozen)
# Cuda
self.use_cuda = torch.cuda.is_available()
if self.use_cuda:
self.net.cuda()
self.target_net.cuda()
# Pretrained
if pretrained_model:
self.net.load(pretrained_model)
self.target_net.load(pretrained_model)
self.pretrained_model = True
else:
self.pretrained_model = False
# Optimizer
self.learning_rate = learning_rate
self.optimizer = optim.Adam(filter(lambda p: p.requires_grad, self.net.parameters()),
lr=learning_rate)
#self.optimizer = optim.RMSprop(filter(lambda p: p.requires_grad, self.net.parameters()),
# lr=learning_rate,alpha=0.95, eps=0.01)
self.batch_size = batch_size
self.optimize_each_k = 1
self.update_target_net_each_k_steps = 10000
self.noops_count = 0
# Replay Memory (Long term memory)
self.replay = ReplayMemory(capacity=mem_size, num_history_frames=state_buffer_size)
self.mem_size = mem_size
# Fill replay memory before training
if not self.pretrained_model:
self.start_train_after = 50000
else:
self.start_train_after = mem_size//2
# Buffer for the most recent states (Short term memory)
self.num_stored_frames = state_buffer_size
# Steps
self.steps = 0
# Save net
self.save_net_each_k_episodes = 500
