def create_model(self) -> None:
"""
Initialize the model
Initializes optimizer and replay buffers as well.
"""
state_dim, action_dim, discrete, _ = get_env_properties(self.env)
self.q1 = (get_model("v", self.network_type)(
state_dim, action_dim, "Qsa", self.layers).to(self.device).float())
self.q2 = (get_model("v", self.network_type)(
state_dim, action_dim, "Qsa", self.layers).to(self.device).float())
self.policy = (get_model(
"p", self.network_type)(state_dim,
action_dim,
self.layers,
discrete,
False,
sac=True).to(self.device).float())
self.q1_targ = deepcopy(self.q1).to(self.device).float()
self.q2_targ = deepcopy(self.q2).to(self.device).float()
# freeze target parameters
for param in self.q1_targ.parameters():
param.requires_grad = False
for param in self.q2_targ.parameters():
param.requires_grad = False
# optimizers
self.q1_optimizer = opt.Adam(self.q1.parameters(), self.lr)
self.q2_optimizer = opt.Adam(self.q2.parameters(), self.lr)
self.policy_optimizer = opt.Adam(self.policy.parameters(), self.lr)
if self.entropy_tuning:
self.target_entropy = -torch.prod(
torch.Tensor(self.env.action_space.shape).to(
self.device)).item()
self.log_alpha = torch.zeros(1,
requires_grad=True,
device=self.device)
self.alpha_optim = opt.Adam([self.log_alpha], lr=self.lr)
self.replay_buffer = ReplayBuffer(self.replay_size, self.env)
# set action scales
if self.env.action_space is None:
self.action_scale = torch.tensor(1.0).to(self.device)
self.action_bias = torch.tensor(0.0).to(self.device)
else:
self.action_scale = torch.FloatTensor(
(self.env.action_space.high - self.env.action_space.low) /
2.0).to(self.device)
self.action_bias = torch.FloatTensor(
(self.env.action_space.high + self.env.action_space.low) /
2.0).to(self.device)
def create_model(self):
# Instantiate networks and optimizers
(state_dim, action_dim, disc,
action_lim) = self.get_env_properties(self.env)
self.policy_new, self.policy_old = (
get_model("p", self.network_type)(state_dim,
action_dim,
self.layers,
disc=disc,
action_lim=action_lim),
get_model("p", self.network_type)(state_dim,
action_dim,
self.layers,
disc=disc,
action_lim=action_lim),
)
self.policy_new = self.policy_new.to(self.device)
self.policy_old = self.policy_old.to(self.device)
self.value_fn = get_model("v", self.network_type)(
state_dim, action_dim).to(self.device)
# load paramaters if already trained
if self.pretrained is not None:
self.load(self)
self.policy_new.load_state_dict(self.checkpoint["policy_weights"])
self.value_fn.load_state_dict(self.checkpoint["value_weights"])
for key, item in self.checkpoint.items():
if key not in [
"policy_weights", "value_weights", "save_model"
]:
setattr(self, key, item)
print("Loaded pretrained model")
self.policy_old.load_state_dict(self.policy_new.state_dict())
self.optimizer_policy = opt.Adam(self.policy_new.parameters(),
lr=self.lr_policy)
self.optimizer_value = opt.Adam(self.value_fn.parameters(),
lr=self.lr_value)
self.traj_reward = []
self.policy_old.policy_hist = Variable(torch.Tensor()).to(self.device)
self.policy_new.policy_hist = Variable(torch.Tensor()).to(self.device)
self.value_fn.value_hist = Variable(torch.Tensor()).to(self.device)
self.policy_new.loss_hist = Variable(torch.Tensor()).to(self.device)
self.value_fn.loss_hist = Variable(torch.Tensor()).to(self.device)
def create_model(self):
state_dim = self.env.observation_space.shape[0]
action_dim = self.env.action_space.shape[0]
if self.noise is not None:
self.noise = self.noise(np.zeros_like(action_dim),
self.noise_std * np.ones_like(action_dim))
self.ac = get_model("ac", self.network_type)(state_dim, action_dim,
self.layers, "Qsa",
False).to(self.device)
# load paramaters if already trained
if self.pretrained is not None:
self.load(self)
self.ac.load_state_dict(self.checkpoint["weights"])
for key, item in self.checkpoint.items():
if key not in ["weights", "save_model"]:
setattr(self, key, item)
print("Loaded pretrained model")
self.ac_target = deepcopy(self.ac).to(self.device)
# freeze target network params
for param in self.ac_target.parameters():
param.requires_grad = False
self.replay_buffer = ReplayBuffer(self.replay_size)
self.optimizer_policy = opt.Adam(self.ac.actor.parameters(),
lr=self.lr_p)
self.optimizer_q = opt.Adam(self.ac.critic.parameters(), lr=self.lr_q)
def create_model(self) -> None:
"""
Initialize the model
Initializes optimizer and replay buffers as well.
"""
state_dim, action_dim, discrete, _ = get_env_properties(self.env)
if discrete:
raise Exception(
"Discrete Environments not supported for {}.".format(
__class__.__name__))
if self.noise is not None:
self.noise = self.noise(np.zeros_like(action_dim),
self.noise_std * np.ones_like(action_dim))
self.ac = get_model("ac", self.network_type)(state_dim, action_dim,
self.layers, "Qsa",
False).to(self.device)
self.ac_target = deepcopy(self.ac).to(self.device)
# freeze target network params
for param in self.ac_target.parameters():
param.requires_grad = False
self.replay_buffer = ReplayBuffer(self.replay_size, self.env)
self.optimizer_policy = opt.Adam(self.ac.actor.parameters(),
lr=self.lr_p)
self.optimizer_q = opt.Adam(self.ac.critic.parameters(), lr=self.lr_q)
def create_model(self) -> None:
"""
Creates actor critic model and initialises optimizers
"""
input_dim, action_dim, discrete, action_lim = get_env_properties(
self.env, self.network_type)
if self.noise is not None:
self.noise = self.noise(np.zeros_like(action_dim),
self.noise_std * np.ones_like(action_dim))
self.ac = get_model("ac", self.network_type)(input_dim,
action_dim,
self.layers,
"V",
discrete,
action_lim=action_lim).to(
self.device)
self.optimizer_policy = opt.Adam(self.ac.actor.parameters(),
lr=self.lr_policy)
self.optimizer_value = opt.Adam(self.ac.critic.parameters(),
lr=self.lr_value)
self.rollout = RolloutBuffer(self.rollout_size, self.env)
def create_model(self):
state_dim, action_dim, disc = self.get_env_properties()
if self.noise is not None:
self.noise = self.noise(np.zeros_like(action_dim),
self.noise_std * np.ones_like(action_dim))
self.ac = get_model("ac", self.network_type)(state_dim, action_dim,
self.layers, "Qsa",
False).to(self.device)
self.ac.qf1 = self.ac.critic
self.ac.qf2 = get_model("v", self.network_type)(state_dim,
action_dim,
hidden=self.layers,
val_type="Qsa")
self.ac.qf1.to(self.device)
self.ac.qf2.to(self.device)
if self.pretrained is not None:
self.load(self)
self.ac.actor.load_state_dict(self.checkpoint["policy_weights"])
self.ac.qf1.load_state_dict(self.checkpoint["q1_weights"])
self.ac.qf2.load_state_dict(self.checkpoint["q2_weights"])
for key, item in self.checkpoint.items():
if key not in ["weights", "save_model"]:
setattr(self, key, item)
print("Loaded pretrained model")
self.ac_target = deepcopy(self.ac).to(self.device)
# freeze target network params
for param in self.ac_target.parameters():
param.requires_grad = False
self.replay_buffer = ReplayBuffer(self.replay_size)
self.q_params = (list(self.ac.qf1.parameters()) +
list(self.ac.qf2.parameters()))
self.optimizer_q = torch.optim.Adam(self.q_params, lr=self.lr_q)
self.optimizer_policy = torch.optim.Adam(self.ac.actor.parameters(),
lr=self.lr_p)
def create_model(self) -> None:
"""
Initialize the model and target model for various variants of DQN.
Initializes optimizer and replay buffers as well.
"""
state_dim, action_dim, _, _ = get_env_properties(self.env)
if self.network_type == "mlp":
if self.dueling_dqn:
self.model = DuelingDQNValueMlp(state_dim, action_dim)
elif self.categorical_dqn:
self.model = CategoricalDQNValue(state_dim, action_dim,
self.num_atoms)
elif self.noisy_dqn:
self.model = NoisyDQNValue(state_dim, action_dim)
else:
self.model = get_model("v",
self.network_type)(state_dim,
action_dim, "Qs")
elif self.network_type == "cnn":
self.framestack = self.env.framestack
if self.dueling_dqn:
self.model = DuelingDQNValueCNN(action_dim, self.framestack)
elif self.noisy_dqn:
self.model = NoisyDQNValueCNN(action_dim, self.framestack)
elif self.categorical_dqn:
self.model = CategoricalDQNValueCNN(action_dim, self.num_atoms,
self.framestack)
else:
self.model = get_model("v", self.network_type)(action_dim,
self.framestack,
"Qs")
self.target_model = deepcopy(self.model)
if self.prioritized_replay:
self.replay_buffer = PrioritizedBuffer(
self.replay_size, self.prioritized_replay_alpha)
else:
self.replay_buffer = ReplayBuffer(self.replay_size, self.env)
self.optimizer = opt.Adam(self.model.parameters(), lr=self.lr)
def create_model(self):
'''
Initialize the actor and critic networks
'''
state_dim = self.env.observation_space.shape[0]
action_lim = None
if isinstance(self.env.action_space, gym.spaces.Discrete):
action_dim = self.env.action_space.n
discrete = True
elif isinstance(self.env.action_space, gym.spaces.Box):
action_dim = self.env.action_space.shape[0]
action_lim = self.env.action_space.high[0]
discrete = False
else:
raise NotImplementedError
# Instantiate networks and optimizers
self.ac = get_model("ac", self.network_type)(state_dim,
action_dim,
self.layers,
"V",
discrete,
action_lim=action_lim).to(
self.device)
# load paramaters if already trained
if self.pretrained is not None:
self.load(self)
self.ac.actor.load_state_dict(self.checkpoint["policy_weights"])
self.ac.critic.load_state_dict(self.checkpoint["value_weights"])
for key, item in self.checkpoint.items():
if key not in [
"policy_weights", "value_weights", "save_model"
]:
setattr(self, key, item)
print("Loaded pretrained model")
self.optimizer_policy = opt.Adam(self.ac.actor.parameters(),
lr=self.lr_policy)
self.optimizer_value = opt.Adam(self.ac.critic.parameters(),
lr=self.lr_value)
self.policy_hist = Variable(torch.Tensor()).to(self.device)
self.value_hist = Variable(torch.Tensor()).to(self.device)
self.traj_reward = []
self.policy_loss_hist = Variable(torch.Tensor()).to(self.device)
self.value_loss_hist = Variable(torch.Tensor()).to(self.device)
def create_model(self) -> None:
state_dim, action_dim, discrete, _ = get_env_properties(self.env)
if discrete:
raise Exception(
"Discrete Environments not supported for {}.".format(__class__.__name__)
)
if self.noise is not None:
self.noise = self.noise(
np.zeros_like(action_dim), self.noise_std * np.ones_like(action_dim)
)
self.ac = get_model("ac", self.network_type)(
state_dim, action_dim, self.layers, "Qsa", False
).to(self.device)
self.ac.qf1 = self.ac.critic
self.ac.qf2 = get_model("v", self.network_type)(
state_dim, action_dim, hidden=self.layers, val_type="Qsa"
)
self.ac.qf1.to(self.device)
self.ac.qf2.to(self.device)
self.ac_target = deepcopy(self.ac).to(self.device)
# freeze target network params
for param in self.ac_target.parameters():
param.requires_grad = False
self.replay_buffer = ReplayBuffer(self.replay_size, self.env)
self.q_params = list(self.ac.qf1.parameters()) + list(self.ac.qf2.parameters())
self.optimizer_q = torch.optim.Adam(self.q_params, lr=self.lr_q)
self.optimizer_policy = torch.optim.Adam(
self.ac.actor.parameters(), lr=self.lr_p
)
def create_model(self):
"""
Initialize the actor and critic networks
"""
input_dim, action_dim, discrete, action_lim = get_env_properties(
self.env, self.network_type
)
# Instantiate networks and optimizers
self.actor = get_model("p", self.network_type)(
input_dim, action_dim, self.layers, "V", discrete, action_lim=action_lim
).to(self.device)
self.optimizer_policy = opt.Adam(self.actor.parameters(), lr=self.lr_policy)
self.rollout = RolloutBuffer(self.rollout_size, self.env,)
def create_model(self) -> None:
"""
Creates actor critic model and initialises optimizers
"""
(state_dim, action_dim, discrete,
action_lim) = self.get_env_properties()
if self.noise is not None:
self.noise = self.noise(np.zeros_like(action_dim),
self.noise_std * np.ones_like(action_dim))
self.ac = get_model("ac", self.network_type)(state_dim,
action_dim,
self.layers,
"V",
discrete,
action_lim=action_lim).to(
self.device)
self.actor_optimizer = opt.Adam(self.ac.actor.parameters(),
lr=self.lr_actor)
self.critic_optimizer = opt.Adam(self.ac.critic.parameters(),
lr=self.lr_critic)
self.traj_reward = []
self.actor_hist = torch.Tensor().to(self.device)
self.critic_hist = torch.Tensor().to(self.device)
self.actor_loss_hist = torch.Tensor().to(self.device)
self.critic_loss_hist = torch.Tensor().to(self.device)
# load paramaters if already trained
if self.run_num is not None:
self.load(self)
self.ac.actor.load_state_dict(self.checkpoint["actor_weights"])
self.ac.critic.load_state_dict(self.checkpoint["critic_weights"])
for key, item in self.checkpoint.items():
if key not in ["actor_weights", "critic_weights"]:
setattr(self, key, item)
print("Loaded pretrained model")
def create_model(self):
# Instantiate networks and optimizers
input_dim, action_dim, discrete, action_lim = get_env_properties(
self.env, self.network_type)
self.ac = get_model("ac", self.network_type)(
input_dim,
action_dim,
self.layers,
"V",
discrete,
action_lim=action_lim,
activation=self.activation,
).to(self.device)
self.optimizer_policy = opt.Adam(self.ac.actor.parameters(),
lr=self.lr_policy)
self.optimizer_value = opt.Adam(self.ac.critic.parameters(),
lr=self.lr_value)
self.rollout = RolloutBuffer(self.rollout_size,
self.env,
gae_lambda=0.95)
def create_model(self):
state_dim = self.env.observation_space.shape[0]
# initialize models
if isinstance(self.env.action_space, gym.spaces.Discrete):
action_dim = self.env.action_space.n
disc = True
elif isinstance(self.env.action_space, gym.spaces.Box):
action_dim = self.env.action_space.shape[0]
disc = False
else:
raise NotImplementedError
self.q1 = get_model("v",
self.network_type)(state_dim, action_dim, "Qsa",
self.layers).to(self.device)
self.q2 = get_model("v",
self.network_type)(state_dim, action_dim, "Qsa",
self.layers).to(self.device)
self.policy = get_model("p",
self.network_type)(state_dim,
action_dim,
self.layers,
disc,
False,
sac=True).to(self.device)
if self.pretrained is not None:
self.load(self)
self.q1.load_state_dict(self.checkpoint["q1_weights"])
self.q2.load_state_dict(self.checkpoint["q2_weights"])
self.policy.load_state_dict(self.checkpoint["policy_weights"])
for key, item in self.checkpoint.items():
if key not in ["weights", "save_model"]:
setattr(self, key, item)
print("Loaded pretrained model")
self.q1_targ = deepcopy(self.q1).to(self.device)
self.q2_targ = deepcopy(self.q2).to(self.device)
# freeze target parameters
for p in self.q1_targ.parameters():
p.requires_grad = False
for p in self.q2_targ.parameters():
p.requires_grad = False
# optimizers
self.q1_optimizer = opt.Adam(self.q1.parameters(), self.lr)
self.q2_optimizer = opt.Adam(self.q2.parameters(), self.lr)
self.policy_optimizer = opt.Adam(self.policy.parameters(), self.lr)
if self.entropy_tuning:
self.target_entropy = -torch.prod(
torch.Tensor(self.env.action_space.shape).to(
self.device)).item()
self.log_alpha = torch.zeros(1,
requires_grad=True,
device=self.device)
self.alpha_optim = opt.Adam([self.log_alpha], lr=self.lr)
self.replay_buffer = ReplayBuffer(self.replay_size)
# set action scales
if self.env.action_space is None:
self.action_scale = torch.tensor(1.0).to(self.device)
self.action_bias = torch.tensor(0.0).to(self.device)
else:
self.action_scale = torch.FloatTensor(
(self.env.action_space.high - self.env.action_space.low) /
2.0).to(self.device)
self.action_bias = torch.FloatTensor(
(self.env.action_space.high + self.env.action_space.low) /
2.0).to(self.device)
def create_model(self):
'''
Initialize the model and target model for various variants of DQN.
Initializes optimizer and replay buffers as well.
'''
state_dim, action_dim, disc = self.get_env_properties()
if self.network_type == "mlp":
if self.dueling_dqn:
self.model = DuelingDQNValueMlp(state_dim, action_dim)
elif self.categorical_dqn:
self.model = CategoricalDQNValue(
state_dim,
action_dim,
self.num_atoms,
)
elif self.noisy_dqn:
self.model = NoisyDQNValue(state_dim, action_dim)
else:
self.model = get_model("v",
self.network_type)(state_dim,
action_dim, "Qs")
elif self.network_type == "cnn":
if self.history_length is None:
self.history_length = 4
if self.transform is None:
self.transform = transforms.Compose([
transforms.ToPILImage(),
transforms.Grayscale(),
transforms.Resize((110, 84)),
transforms.CenterCrop(84),
transforms.ToTensor()
])
self.state_history = deque([
self.transform(self.env.observation_space.sample()).reshape(
-1, 84, 84) for _ in range(self.history_length)
],
maxlen=self.history_length)
if self.dueling_dqn:
self.model = DuelingDQNValueCNN(self.env.action_space.n,
self.history_length)
elif self.noisy_dqn:
self.model = NoisyDQNValueCNN(self.env.action_space.n,
self.history_length)
elif self.categorical_dqn:
self.model = CategoricalDQNValueCNN(self.env.action_space.n,
self.num_atoms,
self.history_length)
else:
self.model = get_model("v", self.network_type)(
self.env.action_space.n, self.history_length, "Qs")
# load paramaters if already trained
if self.pretrained is not None:
self.load(self)
self.model.load_state_dict(self.checkpoint["weights"])
for key, item in self.checkpoint.items():
if key not in ["weights", "save_model"]:
setattr(self, key, item)
print("Loaded pretrained model")
self.target_model = deepcopy(self.model)
if self.prioritized_replay:
self.replay_buffer = PrioritizedBuffer(
self.replay_size, self.prioritized_replay_alpha)
else:
self.replay_buffer = ReplayBuffer(self.replay_size)
self.optimizer = opt.Adam(self.model.parameters(), lr=self.lr)