def __init__(self, num_inputs, action_space):
super(MLPPolicy, self).__init__()
self.obs_filter = ObsNorm((1, num_inputs), clip=5)
self.action_space = action_space
self.a_fc1 = nn.Linear(num_inputs, 64, bias=False)
self.a_ab1 = AddBias(64)
self.a_fc2 = nn.Linear(64, 64, bias=False)
self.a_ab2 = AddBias(64)
self.a_fc_mean = nn.Linear(64, action_space.shape[0], bias=False)
self.a_ab_mean = AddBias(action_space.shape[0])
self.a_ab_logstd = AddBias(action_space.shape[0])
self.v_fc1 = nn.Linear(num_inputs, 64, bias=False)
self.v_ab1 = AddBias(64)
self.v_fc2 = nn.Linear(64, 64, bias=False)
self.v_ab2 = AddBias(64)
self.v_fc3 = nn.Linear(64, 1, bias=False)
self.v_ab3 = AddBias(1)
self.apply(weights_init_mlp)
tanh_gain = nn.init.calculate_gain('tanh')
#self.a_fc1.weight.data.mul_(tanh_gain)
#self.a_fc2.weight.data.mul_(tanh_gain)
self.a_fc_mean.weight.data.mul_(0.01)
#self.v_fc1.weight.data.mul_(tanh_gain)
#self.v_fc2.weight.data.mul_(tanh_gain)
self.train()
def __init__(self, num_inputs, action_space, do_encode_mean=True):
super(MLPPolicySeparate, self).__init__()
self.obs_filter = ObsNorm((1, num_inputs), clip=5)
self.action_space = action_space
self.a_fc1 = nn.Linear(num_inputs, 64)
self.a_fc2 = nn.Linear(64, 64)
self.a_fc_mean = nn.Linear(64, action_space.shape[0])
self.a_log_std = nn.Parameter(torch.zeros(1, action_space.shape[0]))
self.v_fc1 = nn.Linear(num_inputs, 32)
self.v_fc2 = nn.Linear(32, 32)
self.v_fc3 = nn.Linear(32, 1)
self.latent_model = LatentModel(32 + action_space.shape[0], 32)
self.apply(weights_init_mlp)
self.do_encode_mean = do_encode_mean
tanh_gain = nn.init.calculate_gain('tanh')
#self.a_fc1.weight.data.mul_(tanh_gain)
#self.a_fc2.weight.data.mul_(tanh_gain)
self.a_fc_mean.weight.data.mul_(0.01)
#self.v_fc1.weight.data.mul_(tanh_gain)
#self.v_fc2.weight.data.mul_(tanh_gain)
self.train()
def __init__(self, num_inputs, num_outputs):
super(LatentModel, self).__init__()
self.enc_filter = ObsNorm((1, 32), clip=10.0)
self.fc1 = nn.Linear(num_inputs, num_outputs)
self.fcr = nn.Linear(num_inputs, 1) # reward est
self.apply(weights_init_mlp)
self.train()
def __init__(self, obs_shape, action_space):
super(CNNContinuousPolicySeparate, self).__init__()
num_inputs = obs_shape[0]
d = obs_shape[-1]
self.extra_conv = False
if d == 32:
self.actor_conv_reshape = 16 * 8 * 8
elif d == 48:
self.actor_conv_reshape = 16 * 12 * 12
# self.actor_conv_reshape = 16 * 6 * 6
elif d == 64:
self.actor_conv_reshape = 16 * 8 * 8
else:
raise Exception
self.conv1_a = nn.Conv2d(num_inputs, 16, 4, stride=2, padding=1)
self.conv2_a = nn.Conv2d(16, 16, 4, stride=2, padding=1)
if d > 48:
self.conv3_a = nn.Conv2d(16, 16, 4, stride=2, padding=1)
self.extra_conv = True
self.linear1_a = nn.Linear(self.actor_conv_reshape, 32)
self.fc_mean_a = nn.Linear(32, action_space.shape[0])
self.a_log_std = nn.Parameter(torch.zeros(1, action_space.shape[0]))
if d == 32:
self.critic_conv_reshape = 16 * 16 * 16
elif d == 48:
self.critic_conv_reshape = 16 * 24 * 24
# self.critic_conv_reshape = 16 * 12 * 12
elif d == 64:
self.critic_conv_reshape = 16 * 16 * 16
else:
raise Exception
self.conv1_v = nn.Conv2d(num_inputs, 16, 4, stride=2, padding=1)
if self.extra_conv:
self.conv2_v = nn.Conv2d(16, 16, 4, stride=2, padding=1)
self.linear1_v = nn.Linear(self.critic_conv_reshape, 32)
self.enc_filter = ObsNorm((1, 32), clip=10.0)
self.critic_linear_v = nn.Linear(32, 1)
self.apply(weights_init)
relu_gain = nn.init.calculate_gain('relu')
self.conv1_a.weight.data.mul_(relu_gain)
self.conv2_a.weight.data.mul_(relu_gain)
self.linear1_a.weight.data.mul_(relu_gain)
self.conv1_v.weight.data.mul_(relu_gain)
self.linear1_v.weight.data.mul_(relu_gain)
self.train()
def __init__(self, num_inputs, action_space):
super(CNN3ContinuousPolicySeparate, self).__init__()
self.conv_reshape = 16 * 3 * 3
self.conv1_a = nn.Conv3d(1, 32, 3, stride=(1, 2, 2), padding=(1, 0, 0))
self.conv2_a = nn.Conv3d(32,
32,
3,
stride=(1, 2, 2),
padding=(1, 0, 0))
self.conv3_a = nn.Conv3d(32,
16, (4, 3, 3),
stride=(1, 2, 2),
padding=(0, 0, 0))
self.linear1_a = nn.Linear(self.conv_reshape, 64)
self.fc_mean_a = nn.Linear(64, action_space.shape[0])
self.a_log_std = nn.Parameter(torch.zeros(1, action_space.shape[0]))
self.conv1_v = nn.Conv3d(1, 32, 3, stride=(1, 2, 2), padding=(1, 0, 0))
self.conv2_v = nn.Conv3d(32,
32,
3,
stride=(1, 2, 2),
padding=(1, 0, 0))
self.conv3_v = nn.Conv3d(32,
16, (4, 3, 3),
stride=(1, 2, 2),
padding=(0, 0, 0))
self.linear1_v = nn.Linear(self.conv_reshape, 64)
self.enc_filter = ObsNorm((1, 64), clip=10.0)
self.critic_linear_v = nn.Linear(64, 1)
self.apply(weights_init)
relu_gain = nn.init.calculate_gain('tanh')
self.conv1_a.weight.data.mul_(relu_gain)
self.conv2_a.weight.data.mul_(relu_gain)
self.conv3_a.weight.data.mul_(relu_gain)
self.linear1_a.weight.data.mul_(relu_gain)
self.conv1_v.weight.data.mul_(relu_gain)
self.conv2_v.weight.data.mul_(relu_gain)
self.conv3_v.weight.data.mul_(relu_gain)
self.linear1_v.weight.data.mul_(relu_gain)
self.train()
def __init__(self, num_inputs, action_space, do_encode_mean=True):
print("Making shared MLP actor critic!")
super(MLPPolicy, self).__init__()
self.obs_filter = ObsNorm((1, num_inputs), clip=5)
self.action_space = action_space
self.fc1 = nn.Linear(num_inputs, 64)
self.fc2 = nn.Linear(64, 64)
self.fc_mean = nn.Linear(64, action_space.shape[0])
self.log_std = nn.Parameter(torch.zeros(1, action_space.shape[0]))
self.fc_val = nn.Linear(64, 1)
self.latent_model = LatentModel(64 + action_space.shape[0], 64)
self.apply(weights_init_mlp)
tanh_gain = nn.init.calculate_gain('tanh')
self.fc_mean.weight.data.mul_(0.01)
self.train()
class LatentModel(torch.nn.Module):
def __init__(self, num_inputs, num_outputs):
super(LatentModel, self).__init__()
self.enc_filter = ObsNorm((1, 32), clip=10.0)
self.fc1 = nn.Linear(num_inputs, num_outputs)
self.fcr = nn.Linear(num_inputs, 1) # reward est
self.apply(weights_init_mlp)
self.train()
def cuda(self, **args):
super(MLPPolicy, self).cuda(**args)
self.enc_filter.cuda()
def forward(self, inputs):
# TODO: for now try without filter because it will kill gradients
# inputs.data = self.obs_filter(inputs.data)
x = self.fc1(inputs)
r = self.fcr(inputs)
return x, r
def __init__(self, num_inputs, action_space):
super(MLPPolicy, self).__init__()
self.obs_filter = ObsNorm((1, num_inputs), clip=5)
self.action_space = action_space
self.a_fc1 = nn.Linear(num_inputs, 64, bias=False)
self.a_ab1 = AddBias(64)
self.a_fc2 = nn.Linear(64, 64, bias=False)
self.a_ab2 = AddBias(64)
self.v_fc1 = nn.Linear(num_inputs, 64, bias=False)
self.v_ab1 = AddBias(64)
self.v_fc2 = nn.Linear(64, 64, bias=False)
self.v_ab2 = AddBias(64)
self.v_fc3 = nn.Linear(64, 1, bias=False)
self.v_ab3 = AddBias(1)
if action_space.__class__.__name__ == "Discrete":
num_outputs = action_space.n
self.dist = Categorical(64, num_outputs)
elif action_space.__class__.__name__ == "Box":
num_outputs = action_space.shape[0]
self.dist = DiagGaussian(64, num_outputs)
else:
raise NotImplementedError
self.apply(weights_init_mlp)
tanh_gain = nn.init.calculate_gain('tanh')
#self.a_fc1.weight.data.mul_(tanh_gain)
#self.a_fc2.weight.data.mul_(tanh_gain)
#self.v_fc1.weight.data.mul_(tanh_gain)
#self.v_fc2.weight.data.mul_(tanh_gain)
if action_space.__class__.__name__ == "Box":
self.dist.fc_mean.weight.data.mul_(0.01)
self.train()
def __init__(self, num_inputs, action_space):
super(MLPPolicy, self).__init__()
self.obs_filter = ObsNorm((1, num_inputs), clip=5)
self.action_space = action_space
self.a_fc1 = nn.Linear(num_inputs, 64)
self.a_fc2 = nn.Linear(64, 64)
self.v_fc1 = nn.Linear(num_inputs, 64)
self.v_fc2 = nn.Linear(64, 64)
self.v_fc3 = nn.Linear(64, 1)
if action_space.__class__.__name__ == "Discrete":
num_outputs = action_space.n
self.dist = Categorical(64, num_outputs)
elif action_space.__class__.__name__ == "Box":
num_outputs = action_space.shape[0]
self.dist = DiagGaussian(64, num_outputs)
else:
raise NotImplementedError
self.train()
self.reset_parameters()
def __init__(self, num_inputs, action_space_shape):
super(MLPPolicy, self).__init__()
self.obs_filter = ObsNorm((1, num_inputs), clip=5)
self.action_space = action_space
self.a_fc1 = nn.Linear(num_inputs, 64)
self.a_fc2 = nn.Linear(64, 64)
self.v_fc1 = nn.Linear(num_inputs, 64)
self.v_fc2 = nn.Linear(64, 64)
self.v_fc3 = nn.Linear(64, 1)
num_outputs = action_space_shape
self.dist = Categorical(64, num_outputs)
self.train()
self.reset_parameters()
class MLPPolicy(torch.nn.Module):
def __init__(self, num_inputs, action_space):
super(MLPPolicy, self).__init__()
self.obs_filter = ObsNorm((1, num_inputs), clip=5)
self.action_space = action_space
self.a_fc1 = nn.Linear(num_inputs, 64, bias=False)
self.a_ab1 = AddBias(64)
self.a_fc2 = nn.Linear(64, 64, bias=False)
self.a_ab2 = AddBias(64)
self.a_fc_mean = nn.Linear(64, action_space.shape[0], bias=False)
self.a_ab_mean = AddBias(action_space.shape[0])
self.a_ab_logstd = AddBias(action_space.shape[0])
self.v_fc1 = nn.Linear(num_inputs, 64, bias=False)
self.v_ab1 = AddBias(64)
self.v_fc2 = nn.Linear(64, 64, bias=False)
self.v_ab2 = AddBias(64)
self.v_fc3 = nn.Linear(64, 1, bias=False)
self.v_ab3 = AddBias(1)
self.apply(weights_init_mlp)
tanh_gain = nn.init.calculate_gain('tanh')
#self.a_fc1.weight.data.mul_(tanh_gain)
#self.a_fc2.weight.data.mul_(tanh_gain)
self.a_fc_mean.weight.data.mul_(0.01)
#self.v_fc1.weight.data.mul_(tanh_gain)
#self.v_fc2.weight.data.mul_(tanh_gain)
self.train()
def cuda(self, **args):
super(MLPPolicy, self).cuda(**args)
self.obs_filter.cuda()
def cpu(self, **args):
super(MLPPolicy, self).cpu(**args)
self.obs_filter.cpu()
def forward(self, inputs):
inputs.data = self.obs_filter(inputs.data)
x = self.v_fc1(inputs)
x = self.v_ab1(x)
x = F.tanh(x)
x = self.v_fc2(x)
x = self.v_ab2(x)
x = F.tanh(x)
x = self.v_fc3(x)
x = self.v_ab3(x)
value = x
x = self.a_fc1(inputs)
x = self.a_ab1(x)
x = F.tanh(x)
x = self.a_fc2(x)
x = self.a_ab2(x)
x = F.tanh(x)
x = self.a_fc_mean(x)
x = self.a_ab_mean(x)
action_mean = x
# An ugly hack for my KFAC implementation.
zeros = Variable(torch.zeros(x.size()), volatile=x.volatile)
if x.is_cuda:
zeros = zeros.cuda()
x = self.a_ab_logstd(zeros)
action_logstd = x
return value, action_mean, action_logstd
def act(self, inputs, deterministic=False):
value, action_mean, action_logstd = self(inputs)
action_std = action_logstd.exp()
noise = Variable(torch.randn(action_std.size()))
if action_std.is_cuda:
noise = noise.cuda()
if deterministic is False:
action = action_mean + action_std * noise
else:
action = action_mean
return value, action
def evaluate_actions(self, inputs, actions):
assert inputs.dim(
) == 2, "Expect to have inputs in num_processes * num_steps x ... format"
value, action_mean, action_logstd = self(inputs)
action_std = action_logstd.exp()
action_log_probs = -0.5 * (
(actions - action_mean) / action_std).pow(2) - 0.5 * math.log(
2 * math.pi) - action_logstd
action_log_probs = action_log_probs.sum(1, keepdim=True)
dist_entropy = 0.5 + math.log(2 * math.pi) + action_log_probs
dist_entropy = dist_entropy.sum(-1).mean()
return value, action_log_probs, dist_entropy
class MLPPolicy(FFPolicy):
def __init__(self, num_inputs, action_space):
super(MLPPolicy, self).__init__()
self.obs_filter = ObsNorm((1, num_inputs), clip=5)
self.action_space = action_space
self.a_fc1 = nn.Linear(num_inputs, 64, bias=False)
self.a_ab1 = AddBias(64)
self.a_fc2 = nn.Linear(64, 64, bias=False)
self.a_ab2 = AddBias(64)
self.v_fc1 = nn.Linear(num_inputs, 64, bias=False)
self.v_ab1 = AddBias(64)
self.v_fc2 = nn.Linear(64, 64, bias=False)
self.v_ab2 = AddBias(64)
self.v_fc3 = nn.Linear(64, 1, bias=False)
self.v_ab3 = AddBias(1)
if action_space.__class__.__name__ == "Discrete":
num_outputs = action_space.n
self.dist = Categorical(64, num_outputs)
elif action_space.__class__.__name__ == "Box":
num_outputs = action_space.shape[0]
self.dist = DiagGaussian(64, num_outputs)
else:
raise NotImplementedError
self.apply(weights_init_mlp)
tanh_gain = nn.init.calculate_gain('tanh')
#self.a_fc1.weight.data.mul_(tanh_gain)
#self.a_fc2.weight.data.mul_(tanh_gain)
#self.v_fc1.weight.data.mul_(tanh_gain)
#self.v_fc2.weight.data.mul_(tanh_gain)
if action_space.__class__.__name__ == "Box":
self.dist.fc_mean.weight.data.mul_(0.01)
self.train()
def cuda(self, **args):
super(MLPPolicy, self).cuda(**args)
self.obs_filter.cuda()
def cpu(self, **args):
super(MLPPolicy, self).cpu(**args)
self.obs_filter.cpu()
def forward(self, inputs):
inputs.data = self.obs_filter(inputs.data)
x = self.v_fc1(inputs)
x = self.v_ab1(x)
x = F.tanh(x)
x = self.v_fc2(x)
x = self.v_ab2(x)
x = F.tanh(x)
x = self.v_fc3(x)
x = self.v_ab3(x)
value = x
x = self.a_fc1(inputs)
x = self.a_ab1(x)
x = F.tanh(x)
x = self.a_fc2(x)
x = self.a_ab2(x)
x = F.tanh(x)
return value, x
class MLPPolicySeparate(torch.nn.Module):
def __init__(self, num_inputs, action_space, do_encode_mean=True):
super(MLPPolicySeparate, self).__init__()
self.obs_filter = ObsNorm((1, num_inputs), clip=5)
self.action_space = action_space
self.a_fc1 = nn.Linear(num_inputs, 64)
self.a_fc2 = nn.Linear(64, 64)
self.a_fc_mean = nn.Linear(64, action_space.shape[0])
self.a_log_std = nn.Parameter(torch.zeros(1, action_space.shape[0]))
self.v_fc1 = nn.Linear(num_inputs, 32)
self.v_fc2 = nn.Linear(32, 32)
self.v_fc3 = nn.Linear(32, 1)
self.latent_model = LatentModel(32 + action_space.shape[0], 32)
self.apply(weights_init_mlp)
self.do_encode_mean = do_encode_mean
tanh_gain = nn.init.calculate_gain('tanh')
#self.a_fc1.weight.data.mul_(tanh_gain)
#self.a_fc2.weight.data.mul_(tanh_gain)
self.a_fc_mean.weight.data.mul_(0.01)
#self.v_fc1.weight.data.mul_(tanh_gain)
#self.v_fc2.weight.data.mul_(tanh_gain)
self.train()
def cuda(self, **args):
super(MLPPolicySeparate, self).cuda(**args)
self.obs_filter.cuda()
def forward(self, inputs, encode_mean=False):
self.obs_filter.update(inputs.data)
inputs.data = self.obs_filter(inputs.data)
x = self.v_fc1(inputs)
x = F.tanh(x)
x = self.v_fc2(x)
x = F.tanh(x)
enc = x
x = self.v_fc3(x)
value = x
x = self.a_fc1(inputs)
x = F.tanh(x)
x = self.a_fc2(x)
x = F.tanh(x)
x = self.a_fc_mean(x)
action_mean = x
action_logstd = self.a_log_std.expand_as(action_mean)
return value, action_mean, action_logstd, enc
def act(self, inputs, deterministic=False, encode_mean=False):
value, action_mean, action_logstd, enc = self(inputs,
encode_mean=encode_mean)
if deterministic:
return value, action_mean
action_std = action_logstd.exp()
noise = Variable(torch.randn(action_std.size()))
if action_std.is_cuda:
noise = noise.cuda()
action = action_mean + action_std * noise
# print ("Act: ", action.size(), enc.size())
mpred, rpred = self.latent_model(torch.cat((action, enc), dim=1))
return value, action, enc, mpred, rpred
def evaluate_actions(self, inputs, actions):
assert inputs.dim(
) == 2, "Expect to have inputs in num_processes * num_steps x ... format"
# print ("Inputs: ", inputs.size(), actions.size())
value, action_mean, action_logstd, enc = self(inputs)
mpred, rpred = self.latent_model(torch.cat((actions, enc), dim=1))
action_std = action_logstd.exp()
action_log_probs = -0.5 * (
(actions - action_mean) / action_std).pow(2) - 0.5 * math.log(
2 * math.pi) - action_logstd
action_log_probs = action_log_probs.sum(1, keepdim=True)
dist_entropy = 0.5 + math.log(2 * math.pi) + action_log_probs
dist_entropy = dist_entropy.sum(-1).mean()
return value, action_log_probs, dist_entropy, mpred, rpred
class CNN3ContinuousPolicySeparate(torch.nn.Module):
def __init__(self, num_inputs, action_space):
super(CNN3ContinuousPolicySeparate, self).__init__()
self.conv_reshape = 16 * 3 * 3
self.conv1_a = nn.Conv3d(1, 32, 3, stride=(1, 2, 2), padding=(1, 0, 0))
self.conv2_a = nn.Conv3d(32,
32,
3,
stride=(1, 2, 2),
padding=(1, 0, 0))
self.conv3_a = nn.Conv3d(32,
16, (4, 3, 3),
stride=(1, 2, 2),
padding=(0, 0, 0))
self.linear1_a = nn.Linear(self.conv_reshape, 64)
self.fc_mean_a = nn.Linear(64, action_space.shape[0])
self.a_log_std = nn.Parameter(torch.zeros(1, action_space.shape[0]))
self.conv1_v = nn.Conv3d(1, 32, 3, stride=(1, 2, 2), padding=(1, 0, 0))
self.conv2_v = nn.Conv3d(32,
32,
3,
stride=(1, 2, 2),
padding=(1, 0, 0))
self.conv3_v = nn.Conv3d(32,
16, (4, 3, 3),
stride=(1, 2, 2),
padding=(0, 0, 0))
self.linear1_v = nn.Linear(self.conv_reshape, 64)
self.enc_filter = ObsNorm((1, 64), clip=10.0)
self.critic_linear_v = nn.Linear(64, 1)
self.apply(weights_init)
relu_gain = nn.init.calculate_gain('tanh')
self.conv1_a.weight.data.mul_(relu_gain)
self.conv2_a.weight.data.mul_(relu_gain)
self.conv3_a.weight.data.mul_(relu_gain)
self.linear1_a.weight.data.mul_(relu_gain)
self.conv1_v.weight.data.mul_(relu_gain)
self.conv2_v.weight.data.mul_(relu_gain)
self.conv3_v.weight.data.mul_(relu_gain)
self.linear1_v.weight.data.mul_(relu_gain)
self.train()
def encode(self, inputs):
inputs = inputs.view(inputs.size()[0], 1, 4, 32, 32)
x = self.conv1_v(inputs / 255.0)
x = F.tanh(x)
x = self.conv2_v(x)
x = F.tanh(x)
x = self.conv3_v(x)
x = F.tanh(x)
x = x.view(-1, self.conv_reshape)
x = self.linear1_v(x)
x.data = self.enc_filter(x.data)
return x
def forward(self, inputs, encode_mean=False):
# print (inputs.size())
inputs = inputs.view(inputs.size()[0], 1, 4, 32, 32)
# inputs = inputs.view(4, 1, 4, 32, 32)
x = self.conv1_v(inputs / 255.0)
x = F.tanh(x)
x = self.conv2_v(x)
x = F.tanh(x)
x = self.conv3_v(x)
x = F.tanh(x)
# print (x.size())
x = x.view(-1, self.conv_reshape)
# print (x.size())
# input("")
x = self.linear1_v(x)
if encode_mean:
for i in range(x.size()[0]):
self.enc_filter.update(x[i].data)
x = F.tanh(x)
x = self.critic_linear_v(x)
value = x
x = self.conv1_a(inputs / 255.0)
x = F.tanh(x)
x = self.conv2_a(x)
x = F.tanh(x)
x = self.conv3_a(x)
x = F.tanh(x)
# print (x.size())
# input("")
x = x.view(-1, self.conv_reshape)
x = self.linear1_a(x)
x = F.tanh(x)
x = self.fc_mean_a(x)
action_mean = x
action_logstd = self.a_log_std.expand_as(action_mean)
# print (value.size(), action_mean.size(), action_logstd.size())
return value, action_mean, action_logstd
def cuda(self, **args):
super(CNN3ContinuousPolicySeparate, self).cuda(**args)
self.enc_filter.cuda()
def act(self, inputs, deterministic=False, encode_mean=False):
value, action_mean, action_logstd = self(inputs,
encode_mean=encode_mean)
if deterministic:
return value, action_mean
# print ("value, actm, actlogstd:", value.size(), action_mean.size(), action_logstd.size())
action_std = action_logstd.exp()
noise = Variable(torch.randn(action_std.size()))
if action_std.is_cuda:
noise = noise.cuda()
action = action_mean + action_std * noise
return value, action
def evaluate_actions(self, inputs, actions):
assert inputs.dim(
) == 4, "Expect to have inputs in num_processes * num_steps x ... format"
value, action_mean, action_logstd = self(inputs)
action_std = action_logstd.exp()
action_log_probs = -0.5 * (
(actions - action_mean) / action_std).pow(2) - 0.5 * math.log(
2 * math.pi) - action_logstd
action_log_probs = action_log_probs.sum(1, keepdim=True)
dist_entropy = 0.5 + math.log(2 * math.pi) + action_log_probs
dist_entropy = dist_entropy.sum(-1).mean()
return value, action_log_probs, dist_entropy
class CNNContinuousPolicySeparate(torch.nn.Module):
def __init__(self, obs_shape, action_space):
super(CNNContinuousPolicySeparate, self).__init__()
num_inputs = obs_shape[0]
d = obs_shape[-1]
self.extra_conv = False
if d == 32:
self.actor_conv_reshape = 16 * 8 * 8
elif d == 48:
self.actor_conv_reshape = 16 * 12 * 12
# self.actor_conv_reshape = 16 * 6 * 6
elif d == 64:
self.actor_conv_reshape = 16 * 8 * 8
else:
raise Exception
self.conv1_a = nn.Conv2d(num_inputs, 16, 4, stride=2, padding=1)
self.conv2_a = nn.Conv2d(16, 16, 4, stride=2, padding=1)
if d > 48:
self.conv3_a = nn.Conv2d(16, 16, 4, stride=2, padding=1)
self.extra_conv = True
self.linear1_a = nn.Linear(self.actor_conv_reshape, 32)
self.fc_mean_a = nn.Linear(32, action_space.shape[0])
self.a_log_std = nn.Parameter(torch.zeros(1, action_space.shape[0]))
if d == 32:
self.critic_conv_reshape = 16 * 16 * 16
elif d == 48:
self.critic_conv_reshape = 16 * 24 * 24
# self.critic_conv_reshape = 16 * 12 * 12
elif d == 64:
self.critic_conv_reshape = 16 * 16 * 16
else:
raise Exception
self.conv1_v = nn.Conv2d(num_inputs, 16, 4, stride=2, padding=1)
if self.extra_conv:
self.conv2_v = nn.Conv2d(16, 16, 4, stride=2, padding=1)
self.linear1_v = nn.Linear(self.critic_conv_reshape, 32)
self.enc_filter = ObsNorm((1, 32), clip=10.0)
self.critic_linear_v = nn.Linear(32, 1)
self.apply(weights_init)
relu_gain = nn.init.calculate_gain('relu')
self.conv1_a.weight.data.mul_(relu_gain)
self.conv2_a.weight.data.mul_(relu_gain)
self.linear1_a.weight.data.mul_(relu_gain)
self.conv1_v.weight.data.mul_(relu_gain)
self.linear1_v.weight.data.mul_(relu_gain)
self.train()
def encode(self, inputs):
# print ("CNNContinuousPolicySeparate enc1")
x = self.conv1_v(inputs / 255.0)
x = F.relu(x)
# print ("CNNContinuousPolicySeparate enc2")
if self.extra_conv:
x = self.conv2_v(x)
x = F.relu(x)
# print ("CNNContinuousPolicySeparate enc3")
x = x.view(-1, self.critic_conv_reshape)
x = self.linear1_v(x)
# print ("CNNContinuousPolicySeparate enc4")
x.data = self.enc_filter(x.data)
# print ("CNNContinuousPolicySeparate enc5")
return x
def forward(self, inputs, encode_mean=False):
d = inputs.size()[-1]
x = self.conv1_v(inputs / 255.0)
x = F.relu(x)
if self.extra_conv:
x = self.conv2_v(x)
x = F.relu(x)
# print (x.size())
# input("")
x = x.view(-1, self.critic_conv_reshape)
x = self.linear1_v(x)
if encode_mean:
for i in range(x.size()[0]):
self.enc_filter.update(x[i].data)
x = F.relu(x)
x = self.critic_linear_v(x)
value = x
x = self.conv1_a(inputs / 255.0)
x = F.relu(x)
x = self.conv2_a(x)
x = F.relu(x)
if self.extra_conv:
x = self.conv3_a(x)
x = F.relu(x)
# print (x.size())
# input("")
x = x.view(-1, self.actor_conv_reshape)
x = self.linear1_a(x)
x = F.relu(x)
x = self.fc_mean_a(x)
action_mean = x
action_logstd = self.a_log_std.expand_as(action_mean)
return value, action_mean, action_logstd
def cuda(self, **args):
super(CNNContinuousPolicySeparate, self).cuda(**args)
self.enc_filter.cuda()
def act(self, inputs, deterministic=False, encode_mean=False):
value, action_mean, action_logstd = self(inputs,
encode_mean=encode_mean)
if deterministic:
return value, action_mean
# print ("value, actm, actlogstd:", value.size(), action_mean.size(), action_logstd.size())
action_std = action_logstd.exp()
noise = Variable(torch.randn(action_std.size()))
if action_std.is_cuda:
noise = noise.cuda()
action = action_mean + action_std * noise
return value, action
def evaluate_actions(self, inputs, actions):
assert inputs.dim(
) == 4, "Expect to have inputs in num_processes * num_steps x ... format"
value, action_mean, action_logstd = self(inputs)
action_std = action_logstd.exp()
action_log_probs = -0.5 * (
(actions - action_mean) / action_std).pow(2) - 0.5 * math.log(
2 * math.pi) - action_logstd
action_log_probs = action_log_probs.sum(1, keepdim=True)
dist_entropy = 0.5 + math.log(2 * math.pi) + action_log_probs
dist_entropy = dist_entropy.sum(-1).mean()
return value, action_log_probs, dist_entropy
