def play_func(params, net, cuda, exp_queue):
env = make(params.env_name)
env = wrap_dqn(env)
env.seed(common.SEED)
device = torch.device("cuda" if cuda else "cpu")
selector = EpsilonGreedyActionSelector(epsilon=params.epsilon_start)
epsilon_tracker = common.EpsilonTracker(selector, params)
agent = DQNAgent(net, selector, device=device)
exp_source = ExperienceSourceFirstLast(env, agent, gamma=params.gamma)
for frame_idx, exp in enumerate(exp_source):
epsilon_tracker.frame(frame_idx / BATCH_MUL)
exp_queue.put(exp)
for reward, steps in exp_source.pop_rewards_steps():
exp_queue.put(EpisodeEnded(reward, steps, selector.epsilon))
type=int,
default=DEFAULT_N_STEPS,
help="steps to do on Bellman unroll")
args = parser.parse_args()
device = device("cuda" if args.cuda else "cpu")
env = make(params.env_name)
env = wrap_dqn(env)
env.seed(123)
net = dqn_model.DQN(env.observation_space.shape,
env.action_space.n).to(device)
tgt_net = TargetNet(net)
selector = EpsilonGreedyActionSelector(epsilon=params.epsilon_start)
epsilon_tracker = common.EpsilonTracker(selector, params)
agent = DQNAgent(net, selector, device=device)
exp_source = ExperienceSourceFirstLast(env,
agent,
gamma=params.gamma,
steps_count=args.n)
buffer = ExperienceReplayBuffer(exp_source, buffer_size=params.replay_size)
optimizer = Adam(net.parameters(), lr=params.learning_rate)
def process_batch(engine, batch):
optimizer.zero_grad()
loss = common.calc_loss_dqn(batch,
net,
tgt_net.target_model,
gamma=params.gamma**args.n,
device=device)
loss.backward()
help='Enter the number of steps to unroll bellman eq')
args = parser.parse_args()
print('Starting...')
params = HYPERPARAMS['pong']
device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
print('Running on Device {}'.format(device))
writer = writer = SummaryWriter(comment="-" + params['run_name'] +
"-%d-step noisy-net" % args.n)
env = gym.make(params['env_name'])
env = wrappers.wrap_dqn(env)
# print(env.observation_space.shape, env.action_space.n)
net = NoisyDQN(env.observation_space.shape, env.action_space.n).to(device)
target_net = TargetNet(net)
agent = DQNAgent(net, ArgmaxActionSelector(), device)
experience_source = ExperienceSourceFirstLast(env,
agent,
params['gamma'],
steps_count=args.n)
buffer = ExperienceReplayBuffer(experience_source,
buffer_size=params['replay_size'])
optimizer = optim.Adam(net.parameters(), lr=params['learning_rate'])
frame_idx = 0
with RewardTracker(writer, params['stop_reward']) as reward_tracker:
while True:
frame_idx += 1
buffer.populate(1)
# get latest rewards
default=True,
action="store_true",
help="Enable cuda")
args = parser.parse_args()
device = device("cuda" if args.cuda else "cpu")
env = make(params.env_name)
env = wrap_dqn(env)
env.seed(123)
net = dqn_extra.DistributionalDQN(env.observation_space.shape,
env.action_space.n).to(device)
tgt_net = TargetNet(net)
selector = EpsilonGreedyActionSelector(epsilon=params.epsilon_start)
epsilon_tracker = common.EpsilonTracker(selector, params)
agent = DQNAgent(lambda x: net.qvals(x), selector, device=device)
exp_source = ExperienceSourceFirstLast(env, agent, gamma=params.gamma)
buffer = ExperienceReplayBuffer(exp_source, buffer_size=params.replay_size)
optimizer = Adam(net.parameters(), lr=params.learning_rate)
def process_batch(engine, batch):
optimizer.zero_grad()
loss = calc_loss(batch,
net,
tgt_net.target_model,
gamma=params.gamma,
device=device)
loss.backward()
optimizer.step()
epsilon_tracker.frame(engine.state.iteration)
if engine.state.iteration % params.target_net_sync == 0:
last_states_q_v = net(last_states_v)
best_last_q_v = last_states_q_v.max(dim=1)[0]
best_last_q_v[done_masks] = 0.0
return states_v, actions_v, best_last_q_v * gamma + rewards_v
if __name__ == "__main__":
env = make("CartPole-v0")
obs_size = env.observation_space.shape[0]
n_actions = env.action_space.n
net = Net(obs_size, HIDDEN_SIZE, n_actions)
tgt_net = TargetNet(net)
selector = ArgmaxActionSelector()
selector = EpsilonGreedyActionSelector(epsilon=1, selector=selector)
agent = DQNAgent(net, selector)
exp_source = ExperienceSourceFirstLast(env, agent, gamma=GAMMA)
buffer = ExperienceReplayBuffer(exp_source, buffer_size=REPLAY_SIZE)
optimizer = Adam(net.parameters(), LR)
step = episode = 0
solved = False
while True:
step += 1
buffer.populate(1)
for reward, steps in exp_source.pop_rewards_steps():
episode += 1
print(f"{step}: episode {episode} done, {reward=:.3f}, epsilon={selector.epsilon:.2f}")
solved = reward > 150
if solved:
print("YAY!")