def get_action(self, ob, sample=True, *args, **kwargs):
self.eval_mode()
t_ob = {key: torch_float(ob[key], device=cfg.alg.device) for key in ob}
act_dist_cont, act_dist_disc, val = self.get_act_val(t_ob)
action_cont = action_from_dist(act_dist_cont, sample=sample)
action_discrete = action_from_dist(act_dist_disc, sample=sample)
#print('456', action_discrete.shape, act_dist_disc)
#print('123', action_cont.shape, act_dist_cont)
log_prob_disc = action_log_prob(action_discrete, act_dist_disc)
log_prob_cont = action_log_prob(action_cont, act_dist_cont)
entropy_disc = action_entropy(act_dist_disc, log_prob_disc)
entropy_cont = action_entropy(act_dist_cont, log_prob_cont)
#print("cont:", torch_to_np(log_prob_cont).reshape(-1, 1))
log_prob = log_prob_cont + torch.sum(log_prob_disc, axis=1)
#print(log_prob_cont.shape, log_prob_disc.shape)
entropy = entropy_cont + torch.sum(entropy_disc, axis=1)
action_info = dict(log_prob=torch_to_np(log_prob),
entropy=torch_to_np(entropy),
val=torch_to_np(val))
#print("cd", action_cont.shape, action_discrete.shape)
action = np.concatenate(
(torch_to_np(action_cont), torch_to_np(action_discrete)), axis=1)
#print("action:", action)
return action, action_info
def get_action(self, ob, sample=True, *args, **kwargs):
self.eval_mode()
ob = torch_float(ob, device=cfg.alg.device)
act_dist = self.actor(ob)[0]
action = action_from_dist(act_dist, sample=sample)
action_info = dict()
return torch_to_np(action), action_info
def update_q(self, obs, actions, next_obs, rewards, dones):
q1 = self.q1((obs, actions))[0]
q2 = self.q2((obs, actions))[0]
with torch.no_grad():
next_act_dist = self.actor(next_obs)[0]
next_actions = action_from_dist(next_act_dist, sample=True)
nlog_prob = action_log_prob(next_actions,
next_act_dist).unsqueeze(-1)
nq1_tgt_val = self.q1_tgt((next_obs, next_actions))[0]
nq2_tgt_val = self.q2_tgt((next_obs, next_actions))[0]
nq_tgt_val = torch.min(nq1_tgt_val,
nq2_tgt_val) - self.alpha * nlog_prob
q_tgt_val = rewards + cfg.alg.rew_discount * (1 -
dones) * nq_tgt_val
loss_q1 = F.mse_loss(q1, q_tgt_val)
loss_q2 = F.mse_loss(q2, q_tgt_val)
loss_q = loss_q1 + loss_q2
self.q_optimizer.zero_grad()
loss_q.backward()
grad_norm = clip_grad(self.q_params, cfg.alg.max_grad_norm)
self.q_optimizer.step()
q_info = dict(
q1_loss=loss_q1.item(),
q2_loss=loss_q2.item(),
vec_q1_val=torch_to_np(q1),
vec_q2_val=torch_to_np(q2),
vec_q_tgt_val=torch_to_np(q_tgt_val),
)
q_info['q_grad_norm'] = grad_norm
return q_info
def get_action(self, ob, sample=True, *args, **kwargs):
self.eval_mode()
t_ob = torch_float(ob, device=cfg.alg.device)
act_dist, val = self.get_act_val(t_ob)
action = action_from_dist(act_dist, sample=sample)
log_prob = action_log_prob(action, act_dist)
entropy = action_entropy(act_dist, log_prob)
action_info = dict(log_prob=torch_to_np(log_prob),
entropy=torch_to_np(entropy),
val=torch_to_np(val))
return torch_to_np(action), action_info
def get_action(self, ob, sample=True, hidden_state=None, *args, **kwargs):
self.eval_mode()
t_ob = torch.from_numpy(ob).float().to(cfg.alg.device).unsqueeze(dim=1)
act_dist, val, out_hidden_state = self.get_act_val(
t_ob, hidden_state=hidden_state)
action = action_from_dist(act_dist, sample=sample)
log_prob = action_log_prob(action, act_dist)
entropy = action_entropy(act_dist, log_prob)
action_info = dict(
log_prob=torch_to_np(log_prob.squeeze(1)),
entropy=torch_to_np(entropy.squeeze(1)),
val=torch_to_np(val.squeeze(1)),
)
return torch_to_np(action.squeeze(1)), action_info, out_hidden_state
def update_pi(self, obs):
freeze_model([self.q1, self.q2])
act_dist = self.actor(obs)[0]
new_actions = action_from_dist(act_dist, sample=True)
new_log_prob = action_log_prob(new_actions, act_dist).unsqueeze(-1)
new_q1 = self.q1((obs, new_actions))[0]
new_q2 = self.q2((obs, new_actions))[0]
new_q = torch.min(new_q1, new_q2)
loss_pi = (self.alpha * new_log_prob - new_q).mean()
self.q_optimizer.zero_grad()
self.pi_optimizer.zero_grad()
loss_pi.backward()
grad_norm = clip_grad(self.actor.parameters(), cfg.alg.max_grad_norm)
self.pi_optimizer.step()
pi_info = dict(pi_loss=loss_pi.item(),
pi_neg_log_prob=-new_log_prob.mean().item())
pi_info['pi_grad_norm'] = grad_norm
unfreeze_model([self.q1, self.q2])
return pi_info
def get_action(self, ob, sample=True, hidden_state=None, *args, **kwargs):
self.eval_mode()
if type(ob) is dict:
t_ob = {
key: torch_float(ob[key], device=cfg.alg.device)
for key in ob
}
else:
t_ob = torch.from_numpy(ob).float().to(
cfg.alg.device).unsqueeze(dim=1)
act_dist, val, out_hidden_state = self.get_act_val(
t_ob, hidden_state=hidden_state)
action = action_from_dist(act_dist, sample=sample)
log_prob = action_log_prob(action, act_dist)
entropy = action_entropy(act_dist, log_prob)
in_hidden_state = torch_to_np(
hidden_state) if hidden_state is not None else hidden_state
action_info = dict(log_prob=torch_to_np(log_prob.squeeze(1)),
entropy=torch_to_np(entropy.squeeze(1)),
val=torch_to_np(val.squeeze(1)),
in_hidden_state=in_hidden_state)
return torch_to_np(action.squeeze(1)), action_info, out_hidden_state