def make_model(self, env):
n_dim_obs = env.observation_space.low.size
n_dim_action = env.action_space.low.size
n_hidden_channels = 50
policy = policies.FCGaussianPolicy(n_input_channels=n_dim_obs,
n_hidden_layers=2,
n_hidden_channels=n_hidden_channels,
action_size=n_dim_action,
min_action=env.action_space.low,
max_action=env.action_space.high)
q_func = q_function.FCSAQFunction(n_dim_obs=n_dim_obs,
n_dim_action=n_dim_action,
n_hidden_layers=2,
n_hidden_channels=n_hidden_channels)
return chainer.Chain(policy=policy, q_function=q_func)
def _test_abc(self,
t_max,
use_lstm,
discrete=True,
episodic=True,
steps=100000,
require_success=True):
nproc = 8
def make_env(process_idx, test):
size = 2
return ABC(size=size,
discrete=discrete,
episodic=episodic or test,
partially_observable=self.use_lstm,
deterministic=test)
sample_env = make_env(0, False)
action_space = sample_env.action_space
obs_space = sample_env.observation_space
def phi(x):
return x
n_hidden_channels = 20
n_hidden_layers = 1
nonlinearity = F.leaky_relu
replay_buffer = EpisodicReplayBuffer(10**4)
if use_lstm:
if discrete:
model = acer.ACERSharedModel(
shared=L.LSTM(obs_space.low.size, n_hidden_channels),
pi=policies.FCSoftmaxPolicy(
n_hidden_channels,
action_space.n,
n_hidden_channels=n_hidden_channels,
n_hidden_layers=n_hidden_layers,
nonlinearity=nonlinearity,
min_prob=1e-1),
q=q_function.FCStateQFunctionWithDiscreteAction(
n_hidden_channels,
action_space.n,
n_hidden_channels=n_hidden_channels,
n_hidden_layers=n_hidden_layers,
nonlinearity=nonlinearity),
)
else:
model = acer.ACERSDNSharedModel(
shared=L.LSTM(obs_space.low.size, n_hidden_channels),
pi=policies.FCGaussianPolicy(
n_hidden_channels,
action_space.low.size,
n_hidden_channels=n_hidden_channels,
n_hidden_layers=n_hidden_layers,
bound_mean=True,
min_action=action_space.low,
max_action=action_space.high,
nonlinearity=nonlinearity,
min_var=1e-1),
v=v_function.FCVFunction(
n_hidden_channels,
n_hidden_channels=n_hidden_channels,
n_hidden_layers=n_hidden_layers,
nonlinearity=nonlinearity),
adv=q_function.FCSAQFunction(
n_hidden_channels,
action_space.low.size,
n_hidden_channels=n_hidden_channels,
n_hidden_layers=n_hidden_layers,
nonlinearity=nonlinearity),
)
else:
if discrete:
model = acer.ACERSeparateModel(
pi=policies.FCSoftmaxPolicy(
obs_space.low.size,
action_space.n,
n_hidden_channels=n_hidden_channels,
n_hidden_layers=n_hidden_layers,
nonlinearity=nonlinearity,
min_prob=1e-1),
q=q_function.FCStateQFunctionWithDiscreteAction(
obs_space.low.size,
action_space.n,
n_hidden_channels=n_hidden_channels,
n_hidden_layers=n_hidden_layers,
nonlinearity=nonlinearity),
)
else:
model = acer.ACERSDNSeparateModel(
pi=policies.FCGaussianPolicy(
obs_space.low.size,
action_space.low.size,
n_hidden_channels=n_hidden_channels,
n_hidden_layers=n_hidden_layers,
bound_mean=True,
min_action=action_space.low,
max_action=action_space.high,
nonlinearity=nonlinearity,
min_var=1e-1),
v=v_function.FCVFunction(
obs_space.low.size,
n_hidden_channels=n_hidden_channels,
n_hidden_layers=n_hidden_layers,
nonlinearity=nonlinearity),
adv=q_function.FCSAQFunction(
obs_space.low.size,
action_space.low.size,
n_hidden_channels=n_hidden_channels,
n_hidden_layers=n_hidden_layers,
nonlinearity=nonlinearity),
)
eps = 1e-8
opt = rmsprop_async.RMSpropAsync(lr=1e-3, eps=eps, alpha=0.99)
opt.setup(model)
gamma = 0.5
beta = 1e-5
if self.n_times_replay == 0 and self.disable_online_update:
# At least one of them must be enabled
return
agent = acer.ACER(model,
opt,
replay_buffer=replay_buffer,
t_max=t_max,
gamma=gamma,
beta=beta,
phi=phi,
n_times_replay=self.n_times_replay,
act_deterministically=True,
disable_online_update=self.disable_online_update,
replay_start_size=100,
use_trust_region=self.use_trust_region)
max_episode_len = None if episodic else 2
with warnings.catch_warnings(record=True) as warns:
train_agent_async(outdir=self.outdir,
processes=nproc,
make_env=make_env,
agent=agent,
steps=steps,
max_episode_len=max_episode_len,
eval_interval=500,
eval_n_steps=None,
eval_n_episodes=5,
successful_score=1)
assert len(warns) == 0, warns[0]
# The agent returned by train_agent_async is not guaranteed to be
# successful because parameters could be modified by other processes
# after success. Thus here the successful model is loaded explicitly.
if require_success:
agent.load(os.path.join(self.outdir, 'successful'))
agent.stop_episode()
# Test
env = make_env(0, True)
n_test_runs = 5
for _ in range(n_test_runs):
total_r = 0
obs = env.reset()
done = False
reward = 0.0
while not done:
action = agent.act(obs)
print('state:', obs, 'action:', action)
obs, reward, done, _ = env.step(action)
total_r += reward
if require_success:
self.assertAlmostEqual(total_r, 1)
agent.stop_episode()