def main():
global args
args = parser.parse_args()
args.cuda = not args.no_cuda and torch.cuda.is_available()
args.vis = not args.no_vis
# Set options
if args.path_opt is not None:
with open(args.path_opt, 'r') as handle:
options = yaml.load(handle)
if args.vis_path_opt is not None:
with open(args.vis_path_opt, 'r') as handle:
vis_options = yaml.load(handle)
print('## args')
pprint(vars(args))
print('## options')
pprint(options)
# Put alg_%s and optim_%s to alg and optim depending on commandline
options['use_cuda'] = args.cuda
options['trial'] = args.trial
options['alg'] = options['alg_%s' % args.algo]
options['optim'] = options['optim_%s' % args.algo]
alg_opt = options['alg']
alg_opt['algo'] = args.algo
model_opt = options['model']
env_opt = options['env']
env_opt['env-name'] = args.env_name
log_opt = options['logs']
optim_opt = options['optim']
model_opt['time_scale'] = env_opt['time_scale']
if model_opt['mode'] in ['baselinewtheta', 'phasewtheta']:
model_opt['theta_space_mode'] = env_opt['theta_space_mode']
model_opt['theta_sz'] = env_opt['theta_sz']
elif model_opt['mode'] in ['baseline_lowlevel', 'phase_lowlevel']:
model_opt['theta_space_mode'] = env_opt['theta_space_mode']
# Check asserts
assert (model_opt['mode'] in [
'baseline', 'baseline_reverse', 'phasesimple', 'phasewstate',
'baselinewtheta', 'phasewtheta', 'baseline_lowlevel', 'phase_lowlevel',
'interpolate', 'cyclic', 'maze_baseline', 'maze_baseline_wphase'
])
assert (args.algo in ['a2c', 'ppo', 'acktr'])
if model_opt['recurrent_policy']:
assert args.algo in ['a2c', 'ppo'
], 'Recurrent policy is not implemented for ACKTR'
# Set seed - just make the seed the trial number
seed = args.trial
torch.manual_seed(seed)
if args.cuda:
torch.cuda.manual_seed(seed)
# Initialization
num_updates = int(optim_opt['num_frames']
) // alg_opt['num_steps'] // alg_opt['num_processes']
torch.set_num_threads(1)
# Print warning
print("#######")
print(
"WARNING: All rewards are clipped or normalized so you need to use a monitor (see envs.py) or visdom plot to get true rewards"
)
print("#######")
# Set logging / load previous checkpoint
logpath = os.path.join(log_opt['log_base'], model_opt['mode'],
log_opt['exp_name'], args.algo, args.env_name,
'trial%d' % args.trial)
if len(args.resume) > 0:
assert (os.path.isfile(os.path.join(logpath, args.resume)))
ckpt = torch.load(os.path.join(logpath, 'ckpt.pth.tar'))
start_update = ckpt['update_count']
else:
# Make directory, check before overwriting
if os.path.isdir(logpath):
if click.confirm(
'Logs directory already exists in {}. Erase?'.format(
logpath, default=False)):
os.system('rm -rf ' + logpath)
else:
return
os.system('mkdir -p ' + logpath)
start_update = 0
# Save options and args
with open(os.path.join(logpath, os.path.basename(args.path_opt)),
'w') as f:
yaml.dump(options, f, default_flow_style=False)
with open(os.path.join(logpath, 'args.yaml'), 'w') as f:
yaml.dump(vars(args), f, default_flow_style=False)
# Save git info as well
os.system('git status > %s' % os.path.join(logpath, 'git_status.txt'))
os.system('git diff > %s' % os.path.join(logpath, 'git_diff.txt'))
os.system('git show > %s' % os.path.join(logpath, 'git_show.txt'))
# Set up plotting dashboard
dashboard = Dashboard(options,
vis_options,
logpath,
vis=args.vis,
port=args.port)
# If interpolate mode, choose states
if options['model']['mode'] == 'phase_lowlevel' and options['env'][
'theta_space_mode'] == 'pretrain_interp':
all_states = torch.load(env_opt['saved_state_file'])
s1 = random.choice(all_states)
s2 = random.choice(all_states)
fixed_states = [s1, s2]
elif model_opt['mode'] == 'interpolate':
all_states = torch.load(env_opt['saved_state_file'])
s1 = all_states[env_opt['s1_ind']]
s2 = all_states[env_opt['s2_ind']]
fixed_states = [s1, s2]
else:
fixed_states = None
# Create environments
dummy_env = make_env(args.env_name, seed, 0, logpath, options,
args.verbose)
dummy_env = dummy_env()
envs = [
make_env(args.env_name, seed, i, logpath, options, args.verbose,
fixed_states) for i in range(alg_opt['num_processes'])
]
if alg_opt['num_processes'] > 1:
envs = SubprocVecEnv(envs)
else:
envs = DummyVecEnv(envs)
# Get theta_sz for models (if applicable)
dummy_env.reset()
if model_opt['mode'] == 'baseline_lowlevel':
model_opt['theta_sz'] = dummy_env.env.theta_sz
elif model_opt['mode'] == 'phase_lowlevel':
model_opt['theta_sz'] = dummy_env.env.env.theta_sz
if 'theta_sz' in model_opt:
env_opt['theta_sz'] = model_opt['theta_sz']
# Get observation shape
obs_shape = envs.observation_space.shape
obs_shape = (obs_shape[0] * env_opt['num_stack'], *obs_shape[1:])
# Do vec normalize, but mask out what we don't want altered
if len(envs.observation_space.shape) == 1:
ignore_mask = np.zeros(envs.observation_space.shape)
if env_opt['add_timestep']:
ignore_mask[-1] = 1
if model_opt['mode'] in [
'baselinewtheta', 'phasewtheta', 'baseline_lowlevel',
'phase_lowlevel'
]:
theta_sz = env_opt['theta_sz']
if env_opt['add_timestep']:
ignore_mask[-(theta_sz + 1):] = 1
else:
ignore_mask[-theta_sz:] = 1
if args.finetune_baseline:
ignore_mask = dummy_env.unwrapped._get_obs_mask()
freeze_mask, _ = dummy_env.unwrapped._get_pro_ext_mask()
if env_opt['add_timestep']:
ignore_mask = np.concatenate([ignore_mask, [1]])
freeze_mask = np.concatenate([freeze_mask, [0]])
ignore_mask = (ignore_mask + freeze_mask > 0).astype(float)
envs = ObservationFilter(envs,
ret=alg_opt['norm_ret'],
has_timestep=True,
noclip=env_opt['step_plus_noclip'],
ignore_mask=ignore_mask,
freeze_mask=freeze_mask,
time_scale=env_opt['time_scale'],
gamma=env_opt['gamma'])
else:
envs = ObservationFilter(envs,
ret=alg_opt['norm_ret'],
has_timestep=env_opt['add_timestep'],
noclip=env_opt['step_plus_noclip'],
ignore_mask=ignore_mask,
time_scale=env_opt['time_scale'],
gamma=env_opt['gamma'])
# Set up algo monitoring
alg_filename = os.path.join(logpath, 'Alg.Monitor.csv')
alg_f = open(alg_filename, "wt")
alg_f.write('# Alg Logging %s\n' %
json.dumps({
"t_start": time.time(),
'env_id': dummy_env.spec and dummy_env.spec.id,
'mode': options['model']['mode'],
'name': options['logs']['exp_name']
}))
alg_fields = ['value_loss', 'action_loss', 'dist_entropy']
alg_logger = csv.DictWriter(alg_f, fieldnames=alg_fields)
alg_logger.writeheader()
alg_f.flush()
# Create the policy network
actor_critic = Policy(obs_shape, envs.action_space, model_opt)
if args.cuda:
actor_critic.cuda()
# Create the agent
if envs.action_space.__class__.__name__ == "Discrete":
action_shape = 1
else:
action_shape = envs.action_space.shape[0]
if args.algo == 'a2c':
agent = algo.A2C_ACKTR(actor_critic,
alg_opt['value_loss_coef'],
alg_opt['entropy_coef'],
lr=optim_opt['lr'],
eps=optim_opt['eps'],
alpha=optim_opt['alpha'],
max_grad_norm=optim_opt['max_grad_norm'])
elif args.algo == 'ppo':
agent = algo.PPO(actor_critic,
alg_opt['clip_param'],
alg_opt['ppo_epoch'],
alg_opt['num_mini_batch'],
alg_opt['value_loss_coef'],
alg_opt['entropy_coef'],
lr=optim_opt['lr'],
eps=optim_opt['eps'],
max_grad_norm=optim_opt['max_grad_norm'])
elif args.algo == 'acktr':
agent = algo.A2C_ACKTR(actor_critic,
alg_opt['value_loss_coef'],
alg_opt['entropy_coef'],
acktr=True)
rollouts = RolloutStorage(alg_opt['num_steps'], alg_opt['num_processes'],
obs_shape, envs.action_space,
actor_critic.state_size)
current_obs = torch.zeros(alg_opt['num_processes'], *obs_shape)
# Update agent with loaded checkpoint
if len(args.resume) > 0:
# This should update both the policy network and the optimizer
agent.load_state_dict(ckpt['agent'])
# Set ob_rms
envs.ob_rms = ckpt['ob_rms']
elif len(args.other_resume) > 0:
ckpt = torch.load(args.other_resume)
# This should update both the policy network
agent.actor_critic.load_state_dict(ckpt['agent']['model'])
# Set ob_rms
envs.ob_rms = ckpt['ob_rms']
elif args.finetune_baseline:
# Load the model based on the trial number
ckpt_base = options['lowlevel']['ckpt']
ckpt_file = ckpt_base + '/trial%d/ckpt.pth.tar' % args.trial
ckpt = torch.load(ckpt_file)
# Make "input mask" that tells the model which inputs were the same from before and should be copied
oldinput_mask, _ = dummy_env.unwrapped._get_pro_ext_mask()
# This should update both the policy network
agent.actor_critic.load_state_dict_special(ckpt['agent']['model'],
oldinput_mask)
# Set ob_rms
old_rms = ckpt['ob_rms']
old_size = old_rms.mean.size
if env_opt['add_timestep']:
old_size -= 1
# Only copy the pro state part of it
envs.ob_rms.mean[:old_size] = old_rms.mean[:old_size]
envs.ob_rms.var[:old_size] = old_rms.var[:old_size]
# Inline define our helper function for updating obs
def update_current_obs(obs):
shape_dim0 = envs.observation_space.shape[0]
obs = torch.from_numpy(obs).float()
if env_opt['num_stack'] > 1:
current_obs[:, :-shape_dim0] = current_obs[:, shape_dim0:]
current_obs[:, -shape_dim0:] = obs
# Reset our env and rollouts
obs = envs.reset()
update_current_obs(obs)
rollouts.observations[0].copy_(current_obs)
if args.cuda:
current_obs = current_obs.cuda()
rollouts.cuda()
# These variables are used to compute average rewards for all processes.
episode_rewards = torch.zeros([alg_opt['num_processes'], 1])
final_rewards = torch.zeros([alg_opt['num_processes'], 1])
# Update loop
start = time.time()
for j in range(start_update, num_updates):
for step in range(alg_opt['num_steps']):
# Sample actions
with torch.no_grad():
value, action, action_log_prob, states = actor_critic.act(
rollouts.observations[step], rollouts.states[step],
rollouts.masks[step])
cpu_actions = action.squeeze(1).cpu().numpy()
# Observe reward and next obs
obs, reward, done, info = envs.step(cpu_actions)
#pdb.set_trace()
reward = torch.from_numpy(np.expand_dims(np.stack(reward),
1)).float()
episode_rewards += reward
# If done then clean the history of observations.
masks = torch.FloatTensor([[0.0] if done_ else [1.0]
for done_ in done])
final_rewards *= masks
final_rewards += (1 - masks) * episode_rewards
episode_rewards *= masks
if args.cuda:
masks = masks.cuda()
if current_obs.dim() == 4:
current_obs *= masks.unsqueeze(2).unsqueeze(2)
else:
current_obs *= masks
update_current_obs(obs)
rollouts.insert(current_obs, states, action, action_log_prob,
value, reward, masks)
# Update model and rollouts
with torch.no_grad():
next_value = actor_critic.get_value(rollouts.observations[-1],
rollouts.states[-1],
rollouts.masks[-1]).detach()
rollouts.compute_returns(next_value, alg_opt['use_gae'],
env_opt['gamma'], alg_opt['gae_tau'])
value_loss, action_loss, dist_entropy = agent.update(rollouts)
rollouts.after_update()
# Add algo updates here
alg_info = {}
alg_info['value_loss'] = value_loss
alg_info['action_loss'] = action_loss
alg_info['dist_entropy'] = dist_entropy
alg_logger.writerow(alg_info)
alg_f.flush()
# Save checkpoints
total_num_steps = (j +
1) * alg_opt['num_processes'] * alg_opt['num_steps']
#save_interval = log_opt['save_interval'] * alg_opt['log_mult']
save_interval = 100
if j % save_interval == 0:
# Save all of our important information
save_checkpoint(logpath,
agent,
envs,
j,
total_num_steps,
args.save_every,
final=False)
# Print log
log_interval = log_opt['log_interval'] * alg_opt['log_mult']
if j % log_interval == 0:
end = time.time()
print(
"{}: Updates {}, num timesteps {}, FPS {}, mean/median reward {:.1f}/{:.1f}, min/max reward {:.1f}/{:.1f}, entropy {:.5f}, value loss {:.5f}, policy loss {:.5f}"
.format(options['logs']['exp_name'], j, total_num_steps,
int(total_num_steps / (end - start)),
final_rewards.mean(), final_rewards.median(),
final_rewards.min(), final_rewards.max(), dist_entropy,
value_loss, action_loss))
# Do dashboard logging
vis_interval = log_opt['vis_interval'] * alg_opt['log_mult']
if args.vis and j % vis_interval == 0:
try:
# Sometimes monitor doesn't properly flush the outputs
dashboard.visdom_plot()
except IOError:
pass
# Save final checkpoint
save_checkpoint(logpath,
agent,
envs,
j,
total_num_steps,
args.save_every,
final=False)
# Close logging file
alg_f.close()
def main():
global args
args = parser.parse_args()
args.cuda = not args.no_cuda and torch.cuda.is_available()
args.vis = not args.no_vis
# Set options
if args.path_opt is not None:
with open(args.path_opt, 'r') as handle:
options = yaml.load(handle)
if args.vis_path_opt is not None:
with open(args.vis_path_opt, 'r') as handle:
vis_options = yaml.load(handle)
print('## args')
pprint(vars(args))
print('## options')
pprint(options)
# Put alg_%s and optim_%s to alg and optim depending on commandline
options['use_cuda'] = args.cuda
options['alg'] = options['alg_%s' % args.algo]
options['optim'] = options['optim_%s' % args.algo]
options['trial'] = 0 # Hard coded / doesn't matter
alg_opt = options['alg']
alg_opt['algo'] = args.algo
model_opt = options['model']
env_opt = options['env']
env_opt['env-name'] = args.env_name
log_opt = options['logs']
optim_opt = options['optim']
model_opt['time_scale'] = env_opt['time_scale']
if model_opt['mode'] in ['baselinewtheta', 'phasewtheta']:
model_opt['theta_space_mode'] = env_opt['theta_space_mode']
model_opt['theta_sz'] = env_opt['theta_sz']
elif model_opt['mode'] in ['baseline_lowlevel', 'phase_lowlevel']:
model_opt['theta_space_mode'] = env_opt['theta_space_mode']
# Check asserts
assert (model_opt['mode'] in [
'baseline', 'phasesimple', 'phasewstate', 'baselinewtheta',
'phasewtheta', 'baseline_lowlevel', 'phase_lowlevel', 'interpolate',
'cyclic'
])
assert (args.algo in ['a2c', 'ppo', 'acktr'])
if model_opt['recurrent_policy']:
assert args.algo in ['a2c', 'ppo'
], 'Recurrent policy is not implemented for ACKTR'
# Set seed
torch.manual_seed(args.seed)
if args.cuda:
torch.cuda.manual_seed(args.seed)
torch.set_num_threads(1)
# Set logging / load previous checkpoint
logpath = args.logdir
# Make directory, check before overwriting
assert not os.path.isdir(
logpath), "Give a new directory to save so we don't overwrite anything"
os.system('mkdir -p ' + logpath)
# Load checkpoint
assert (os.path.isfile(args.ckpt))
if args.cuda:
ckpt = torch.load(args.ckpt)
else:
ckpt = torch.load(args.ckpt, map_location=lambda storage, loc: storage)
# Save options and args
with open(os.path.join(logpath, os.path.basename(args.path_opt)),
'w') as f:
yaml.dump(options, f, default_flow_style=False)
with open(os.path.join(logpath, 'args.yaml'), 'w') as f:
yaml.dump(vars(args), f, default_flow_style=False)
# Save git info as well
os.system('git status > %s' % os.path.join(logpath, 'git_status.txt'))
os.system('git diff > %s' % os.path.join(logpath, 'git_diff.txt'))
os.system('git show > %s' % os.path.join(logpath, 'git_show.txt'))
# Set up plotting dashboard
dashboard = Dashboard(options,
vis_options,
logpath,
vis=args.vis,
port=args.port)
# Create environment
verbose = not args.no_verbose
fixed_states = [np.zeros(20), np.zeros(20)]
env = make_env(args.env_name, args.seed, 0, logpath, options, verbose,
fixed_states)
env = DummyVecEnv([env])
if len(env.observation_space.shape) == 1:
ignore_mask = np.zeros(env.observation_space.shape)
if env_opt['add_timestep']:
ignore_mask[-1] = 1
if model_opt['mode'] in ['baselinewtheta', 'phasewtheta']:
theta_sz = env_opt['theta_sz']
if env_opt['add_timestep']:
ignore_mask[-(theta_sz + 1):] = 1
else:
ignore_mask[-theta_sz:] = 1
env = ObservationFilter(env,
ret=False,
has_timestep=env_opt['add_timestep'],
noclip=env_opt['step_plus_noclip'],
ignore_mask=ignore_mask,
time_scale=env_opt['time_scale'],
gamma=env_opt['gamma'],
train=False)
env.ob_rms = ckpt['ob_rms']
raw_env = env.venv.envs[0]
else:
raw_env = env.envs[0]
# Get theta_sz for models (if applicable)
if model_opt['mode'] == 'baseline_lowlevel':
model_opt['theta_sz'] = env.venv.envs[0].env.theta_sz
elif model_opt['mode'] == 'phase_lowlevel':
model_opt['theta_sz'] = env.venv.envs[0].env.env.theta_sz
if 'theta_sz' in model_opt:
env_opt['theta_sz'] = model_opt['theta_sz']
# Init obs/state structures
obs_shape = env.observation_space.shape
obs_shape = (obs_shape[0] * env_opt['num_stack'], *obs_shape[1:])
# Create the policy network
actor_critic = Policy(obs_shape, env.action_space, model_opt)
if args.cuda:
actor_critic.cuda()
# Load the checkpoint
actor_critic.load_state_dict(ckpt['agent']['model'])
if not args.cuda:
actor_critic.base.cuda = False
# Inline define our helper function for updating obs
def update_current_obs(obs):
shape_dim0 = env.observation_space.shape[0]
obs = torch.from_numpy(obs).float()
if env_opt['num_stack'] > 1:
current_obs[:, :-shape_dim0] = current_obs[:, shape_dim0:]
current_obs[:, -shape_dim0:] = obs
# Loop through episodes
obs = env.reset()
assert (args.num_vid <= args.num_ep)
episode_rewards = []
tabbed = False
raw_data = []
for ep in range(args.num_ep):
if ep < args.num_vid:
record = True
else:
record = False
# Reset env
current_obs = torch.zeros(1, *obs_shape)
states = torch.zeros(1, actor_critic.state_size)
masks = torch.zeros(1, 1)
update_current_obs(obs)
# Complete episode
done = False
frames = []
ep_total_reward = 0
while not done:
# Capture screenshot
if record:
raw_env.render()
if not tabbed:
# GLFW TAB and RELEASE are hardcoded here
raw_env.unwrapped.viewer.key_callback(
None, 258, None, 0, None)
tabbed = True
frames.append(
raw_env.unwrapped.viewer._read_pixels_as_in_window())
# Determine action
with torch.no_grad():
value, action, _, states = actor_critic.act(current_obs,
states,
masks,
deterministic=True)
cpu_actions = action.squeeze(1).cpu().numpy()
# Add to dataset (if applicable)
if args.dump_obsdata:
action_cp = np.array(cpu_actions)
raw_obs_cp = np.array(env.raw_obs)
raw_data.append([raw_obs_cp, action_cp])
# Observe reward and next obs
obs, reward, done, info = env.step(cpu_actions)
ep_total_reward += reward
# Update obs
masks.fill_(0.0 if done else 1.0)
if current_obs.dim() == 4:
current_obs *= masks.unsqueeze(2).unsqueeze(2)
else:
current_obs *= masks
update_current_obs(obs)
# Save video
if record:
for fr_ind, fr in enumerate(frames):
scipy.misc.imsave(
os.path.join(logpath, 'tmp_fr_%d.jpg' % fr_ind), fr)
os.system("ffmpeg -r 20 -i %s/" % logpath + "tmp_fr_%01d.jpg -y " +
"%s/results_ep%d.mp4" % (logpath, ep))
os.system("rm %s/tmp_fr*.jpg" % logpath)
# Do dashboard logging for each epsiode
try:
dashboard.visdom_plot()
except IOError:
pass
# Print / dump reward for episode
# DEBUG for thetas
#print("Theta %d" % env.venv.envs[0].env.env.theta)
print("Total reward for episode %d: %f" % (ep, ep_total_reward))
episode_rewards.append(ep_total_reward)
# Dump episode data to file
if args.dump_obsdata:
torch.save(raw_data, logpath + '/raw_episode_data.tar')
# Print average and variance of rewards
avg_r = np.mean(episode_rewards)
std_r = np.std(episode_rewards)
print("Reward over episodes was %f+-%f" % (avg_r, std_r))
# Do dashboard logging
try:
dashboard.visdom_plot()
except IOError:
pass
def main():
global args
args = parser.parse_args()
args.cuda = not args.no_cuda and torch.cuda.is_available()
args.vis = not args.no_vis
# Set options
if args.path_opt is not None:
with open(args.path_opt, 'r') as handle:
options = yaml.load(handle)
if args.vis_path_opt is not None:
with open(args.vis_path_opt, 'r') as handle:
vis_options = yaml.load(handle)
print('## args')
pprint(vars(args))
print('## options')
pprint(options)
# Load the lowlevel opt and
lowlevel_optfile = options['lowlevel']['optfile']
with open(lowlevel_optfile, 'r') as handle:
ll_opt = yaml.load(handle)
# Whether we should set ll policy to be deterministic or not
ll_deterministic = options['lowlevel']['deterministic']
# Put alg_%s and optim_%s to alg and optim depending on commandline
options['use_cuda'] = args.cuda
options['trial'] = args.trial
options['alg'] = options['alg_%s' % args.algo]
options['optim'] = options['optim_%s' % args.algo]
alg_opt = options['alg']
alg_opt['algo'] = args.algo
model_opt = options['model']
env_opt = options['env']
env_opt['env-name'] = args.env_name
log_opt = options['logs']
optim_opt = options['optim']
options[
'lowlevel_opt'] = ll_opt # Save low level options in option file (for logging purposes)
# Pass necessary values in ll_opt
assert (ll_opt['model']['mode'] in ['baseline_lowlevel', 'phase_lowlevel'])
ll_opt['model']['theta_space_mode'] = ll_opt['env']['theta_space_mode']
ll_opt['model']['time_scale'] = ll_opt['env']['time_scale']
# If in many module mode, load the lowlevel policies we want
if model_opt['mode'] == 'hierarchical_many':
# Check asserts
theta_obs_mode = ll_opt['env']['theta_obs_mode']
theta_space_mode = ll_opt['env']['theta_space_mode']
assert (theta_space_mode in [
'pretrain_interp', 'pretrain_any', 'pretrain_any_far',
'pretrain_any_fromstart'
])
assert (theta_obs_mode == 'pretrain')
# Get the theta size
theta_sz = options['lowlevel']['num_load']
ckpt_base = options['lowlevel']['ckpt']
# Load checkpoints
lowlevel_ckpts = []
for ll_ind in range(theta_sz):
if args.change_ll_offset:
ll_offset = theta_sz * args.trial
else:
ll_offset = 0
lowlevel_ckpt_file = ckpt_base + '/trial%d/ckpt.pth.tar' % (
ll_ind + ll_offset)
assert (os.path.isfile(lowlevel_ckpt_file))
lowlevel_ckpts.append(torch.load(lowlevel_ckpt_file))
# Otherwise it's one ll polciy to load
else:
# Get theta_sz for low level model
theta_obs_mode = ll_opt['env']['theta_obs_mode']
theta_space_mode = ll_opt['env']['theta_space_mode']
assert (theta_obs_mode in ['ind', 'vector'])
if theta_obs_mode == 'ind':
if theta_space_mode == 'forward':
theta_sz = 1
elif theta_space_mode == 'simple_four':
theta_sz = 4
elif theta_space_mode == 'simple_eight':
theta_sz = 8
elif theta_space_mode == 'k_theta':
theta_sz = ll_opt['env']['num_theta']
elif theta_obs_mode == 'vector':
theta_sz = 2
else:
raise NotImplementedError
else:
raise NotImplementedError
ll_opt['model']['theta_sz'] = theta_sz
ll_opt['env']['theta_sz'] = theta_sz
# Load the low level policy params
lowlevel_ckpt = options['lowlevel']['ckpt']
assert (os.path.isfile(lowlevel_ckpt))
lowlevel_ckpt = torch.load(lowlevel_ckpt)
hl_action_space = spaces.Discrete(theta_sz)
# Check asserts
assert (args.algo in ['a2c', 'ppo', 'acktr', 'dqn'])
assert (optim_opt['hierarchical_mode']
in ['train_highlevel', 'train_both'])
if model_opt['recurrent_policy']:
assert args.algo in ['a2c', 'ppo'
], 'Recurrent policy is not implemented for ACKTR'
assert (model_opt['mode'] in ['hierarchical', 'hierarchical_many'])
# Set seed - just make the seed the trial number
seed = args.trial + 1000 # Make it different than lowlevel seed
torch.manual_seed(seed)
if args.cuda:
torch.cuda.manual_seed(seed)
# Initialization
num_updates = int(optim_opt['num_frames']) // alg_opt[
'num_steps'] // alg_opt['num_processes'] // optim_opt['num_ll_steps']
torch.set_num_threads(1)
# Print warning
print("#######")
print(
"WARNING: All rewards are clipped or normalized so you need to use a monitor (see envs.py) or visdom plot to get true rewards"
)
print("#######")
# Set logging / load previous checkpoint
logpath = os.path.join(log_opt['log_base'], model_opt['mode'],
log_opt['exp_name'], args.algo, args.env_name,
'trial%d' % args.trial)
if len(args.resume) > 0:
assert (os.path.isfile(os.path.join(logpath, args.resume)))
ckpt = torch.load(os.path.join(logpath, 'ckpt.pth.tar'))
start_update = ckpt['update_count']
else:
# Make directory, check before overwriting
if os.path.isdir(logpath):
if click.confirm(
'Logs directory already exists in {}. Erase?'.format(
logpath, default=False)):
os.system('rm -rf ' + logpath)
else:
return
os.system('mkdir -p ' + logpath)
start_update = 0
# Save options and args
with open(os.path.join(logpath, os.path.basename(args.path_opt)),
'w') as f:
yaml.dump(options, f, default_flow_style=False)
with open(os.path.join(logpath, 'args.yaml'), 'w') as f:
yaml.dump(vars(args), f, default_flow_style=False)
# Save git info as well
os.system('git status > %s' % os.path.join(logpath, 'git_status.txt'))
os.system('git diff > %s' % os.path.join(logpath, 'git_diff.txt'))
os.system('git show > %s' % os.path.join(logpath, 'git_show.txt'))
# Set up plotting dashboard
dashboard = Dashboard(options,
vis_options,
logpath,
vis=args.vis,
port=args.port)
# Create environments
envs = [
make_env(args.env_name, seed, i, logpath, options, args.verbose)
for i in range(alg_opt['num_processes'])
]
if alg_opt['num_processes'] > 1:
envs = SubprocVecEnv(envs)
else:
envs = DummyVecEnv(envs)
# Check if we use timestep in low level
if 'baseline' in ll_opt['model']['mode']:
add_timestep = False
elif 'phase' in ll_opt['model']['mode']:
add_timestep = True
else:
raise NotImplementedError
# Get shapes
dummy_env = make_env(args.env_name, seed, 0, logpath, options,
args.verbose)
dummy_env = dummy_env()
s_pro_dummy = dummy_env.unwrapped._get_pro_obs()
s_ext_dummy = dummy_env.unwrapped._get_ext_obs()
if add_timestep:
ll_obs_shape = (s_pro_dummy.shape[0] + theta_sz + 1, )
ll_raw_obs_shape = (s_pro_dummy.shape[0] + 1, )
else:
ll_obs_shape = (s_pro_dummy.shape[0] + theta_sz, )
ll_raw_obs_shape = (s_pro_dummy.shape[0], )
ll_obs_shape = (ll_obs_shape[0] * env_opt['num_stack'], *ll_obs_shape[1:])
hl_obs_shape = (s_ext_dummy.shape[0], )
hl_obs_shape = (hl_obs_shape[0] * env_opt['num_stack'], *hl_obs_shape[1:])
# Do vec normalize, but mask out what we don't want altered
# Also freeze all of the low level obs
ignore_mask = dummy_env.env._get_obs_mask()
freeze_mask, _ = dummy_env.unwrapped._get_pro_ext_mask()
freeze_mask = np.concatenate([freeze_mask, [0]])
if ('normalize' in env_opt
and not env_opt['normalize']) or args.algo == 'dqn':
ignore_mask = 1 - freeze_mask
if model_opt['mode'] == 'hierarchical_many':
# Actually ignore both ignored values and the low level values
# That filtering will happen later
ignore_mask = (ignore_mask + freeze_mask > 0).astype(float)
envs = ObservationFilter(envs,
ret=alg_opt['norm_ret'],
has_timestep=True,
noclip=env_opt['step_plus_noclip'],
ignore_mask=ignore_mask,
freeze_mask=freeze_mask,
time_scale=env_opt['time_scale'],
gamma=env_opt['gamma'])
else:
envs = ObservationFilter(envs,
ret=alg_opt['norm_ret'],
has_timestep=True,
noclip=env_opt['step_plus_noclip'],
ignore_mask=ignore_mask,
freeze_mask=freeze_mask,
time_scale=env_opt['time_scale'],
gamma=env_opt['gamma'])
# Make our helper object for dealing with hierarchical observations
hier_utils = HierarchyUtils(ll_obs_shape, hl_obs_shape, hl_action_space,
theta_sz, add_timestep)
# Set up algo monitoring
alg_filename = os.path.join(logpath, 'Alg.Monitor.csv')
alg_f = open(alg_filename, "wt")
alg_f.write('# Alg Logging %s\n' %
json.dumps({
"t_start": time.time(),
'env_id': dummy_env.spec and dummy_env.spec.id,
'mode': options['model']['mode'],
'name': options['logs']['exp_name']
}))
alg_fields = ['value_loss', 'action_loss', 'dist_entropy']
alg_logger = csv.DictWriter(alg_f, fieldnames=alg_fields)
alg_logger.writeheader()
alg_f.flush()
ll_alg_filename = os.path.join(logpath, 'AlgLL.Monitor.csv')
ll_alg_f = open(ll_alg_filename, "wt")
ll_alg_f.write('# Alg Logging LL %s\n' %
json.dumps({
"t_start": time.time(),
'env_id': dummy_env.spec and dummy_env.spec.id,
'mode': options['model']['mode'],
'name': options['logs']['exp_name']
}))
ll_alg_fields = ['value_loss', 'action_loss', 'dist_entropy']
ll_alg_logger = csv.DictWriter(ll_alg_f, fieldnames=ll_alg_fields)
ll_alg_logger.writeheader()
ll_alg_f.flush()
# Create the policy networks
ll_action_space = envs.action_space
if args.algo == 'dqn':
model_opt['eps_start'] = optim_opt['eps_start']
model_opt['eps_end'] = optim_opt['eps_end']
model_opt['eps_decay'] = optim_opt['eps_decay']
hl_policy = DQNPolicy(hl_obs_shape, hl_action_space, model_opt)
else:
hl_policy = Policy(hl_obs_shape, hl_action_space, model_opt)
if model_opt['mode'] == 'hierarchical_many':
ll_policy = ModularPolicy(ll_raw_obs_shape, ll_action_space, theta_sz,
ll_opt)
else:
ll_policy = Policy(ll_obs_shape, ll_action_space, ll_opt['model'])
# Load the previous ones here?
if args.cuda:
hl_policy.cuda()
ll_policy.cuda()
# Create the high level agent
if args.algo == 'a2c':
hl_agent = algo.A2C_ACKTR(hl_policy,
alg_opt['value_loss_coef'],
alg_opt['entropy_coef'],
lr=optim_opt['lr'],
eps=optim_opt['eps'],
alpha=optim_opt['alpha'],
max_grad_norm=optim_opt['max_grad_norm'])
elif args.algo == 'ppo':
hl_agent = algo.PPO(hl_policy,
alg_opt['clip_param'],
alg_opt['ppo_epoch'],
alg_opt['num_mini_batch'],
alg_opt['value_loss_coef'],
alg_opt['entropy_coef'],
lr=optim_opt['lr'],
eps=optim_opt['eps'],
max_grad_norm=optim_opt['max_grad_norm'])
elif args.algo == 'acktr':
hl_agent = algo.A2C_ACKTR(hl_policy,
alg_opt['value_loss_coef'],
alg_opt['entropy_coef'],
acktr=True)
elif args.algo == 'dqn':
hl_agent = algo.DQN(hl_policy,
env_opt['gamma'],
batch_size=alg_opt['batch_size'],
target_update=alg_opt['target_update'],
mem_capacity=alg_opt['mem_capacity'],
lr=optim_opt['lr'],
eps=optim_opt['eps'],
max_grad_norm=optim_opt['max_grad_norm'])
# Create the low level agent
# If only training high level, make dummy agent (just does passthrough, doesn't change anything)
if optim_opt['hierarchical_mode'] == 'train_highlevel':
ll_agent = algo.Passthrough(ll_policy)
elif optim_opt['hierarchical_mode'] == 'train_both':
if args.algo == 'a2c':
ll_agent = algo.A2C_ACKTR(ll_policy,
alg_opt['value_loss_coef'],
alg_opt['entropy_coef'],
lr=optim_opt['ll_lr'],
eps=optim_opt['eps'],
alpha=optim_opt['alpha'],
max_grad_norm=optim_opt['max_grad_norm'])
elif args.algo == 'ppo':
ll_agent = algo.PPO(ll_policy,
alg_opt['clip_param'],
alg_opt['ll_ppo_epoch'],
alg_opt['num_mini_batch'],
alg_opt['value_loss_coef'],
alg_opt['entropy_coef'],
lr=optim_opt['ll_lr'],
eps=optim_opt['eps'],
max_grad_norm=optim_opt['max_grad_norm'])
elif args.algo == 'acktr':
ll_agent = algo.A2C_ACKTR(ll_policy,
alg_opt['value_loss_coef'],
alg_opt['entropy_coef'],
acktr=True)
else:
raise NotImplementedError
# Make the rollout structures
hl_rollouts = RolloutStorage(alg_opt['num_steps'],
alg_opt['num_processes'], hl_obs_shape,
hl_action_space, hl_policy.state_size)
ll_rollouts = MaskingRolloutStorage(alg_opt['num_steps'],
alg_opt['num_processes'], ll_obs_shape,
ll_action_space, ll_policy.state_size)
hl_current_obs = torch.zeros(alg_opt['num_processes'], *hl_obs_shape)
ll_current_obs = torch.zeros(alg_opt['num_processes'], *ll_obs_shape)
# Helper functions to update the current obs
def update_hl_current_obs(obs):
shape_dim0 = hl_obs_shape[0]
obs = torch.from_numpy(obs).float()
if env_opt['num_stack'] > 1:
hl_current_obs[:, :-shape_dim0] = hl_current_obs[:, shape_dim0:]
hl_current_obs[:, -shape_dim0:] = obs
def update_ll_current_obs(obs):
shape_dim0 = ll_obs_shape[0]
obs = torch.from_numpy(obs).float()
if env_opt['num_stack'] > 1:
ll_current_obs[:, :-shape_dim0] = ll_current_obs[:, shape_dim0:]
ll_current_obs[:, -shape_dim0:] = obs
# Update agent with loaded checkpoint
if len(args.resume) > 0:
# This should update both the policy network and the optimizer
ll_agent.load_state_dict(ckpt['ll_agent'])
hl_agent.load_state_dict(ckpt['hl_agent'])
# Set ob_rms
envs.ob_rms = ckpt['ob_rms']
else:
if model_opt['mode'] == 'hierarchical_many':
ll_agent.load_pretrained_policies(lowlevel_ckpts)
else:
# Load low level agent
ll_agent.load_state_dict(lowlevel_ckpt['agent'])
# Load ob_rms from low level (but need to reshape it)
old_rms = lowlevel_ckpt['ob_rms']
assert (old_rms.mean.shape[0] == ll_obs_shape[0])
# Only copy the pro state part of it (not including thetas or count)
envs.ob_rms.mean[:s_pro_dummy.
shape[0]] = old_rms.mean[:s_pro_dummy.shape[0]]
envs.ob_rms.var[:s_pro_dummy.shape[0]] = old_rms.var[:s_pro_dummy.
shape[0]]
# Reset our env and rollouts
raw_obs = envs.reset()
hl_obs, raw_ll_obs, step_counts = hier_utils.seperate_obs(raw_obs)
ll_obs = hier_utils.placeholder_theta(raw_ll_obs, step_counts)
update_hl_current_obs(hl_obs)
update_ll_current_obs(ll_obs)
hl_rollouts.observations[0].copy_(hl_current_obs)
ll_rollouts.observations[0].copy_(ll_current_obs)
ll_rollouts.recent_obs.copy_(ll_current_obs)
if args.cuda:
hl_current_obs = hl_current_obs.cuda()
ll_current_obs = ll_current_obs.cuda()
hl_rollouts.cuda()
ll_rollouts.cuda()
# These variables are used to compute average rewards for all processes.
episode_rewards = torch.zeros([alg_opt['num_processes'], 1])
final_rewards = torch.zeros([alg_opt['num_processes'], 1])
# Update loop
start = time.time()
for j in range(start_update, num_updates):
for step in range(alg_opt['num_steps']):
# Step through high level action
start_time = time.time()
with torch.no_grad():
hl_value, hl_action, hl_action_log_prob, hl_states = hl_policy.act(
hl_rollouts.observations[step], hl_rollouts.states[step],
hl_rollouts.masks[step])
hl_cpu_actions = hl_action.squeeze(1).cpu().numpy()
if args.profile:
print('hl act %f' % (time.time() - start_time))
# Get values to use for Q learning
hl_state_dqn = hl_rollouts.observations[step]
hl_action_dqn = hl_action
# Update last ll observation with new theta
for proc in range(alg_opt['num_processes']):
# Update last observations in memory
last_obs = ll_rollouts.observations[ll_rollouts.steps[proc],
proc]
if hier_utils.has_placeholder(last_obs):
new_last_obs = hier_utils.update_theta(
last_obs, hl_cpu_actions[proc])
ll_rollouts.observations[ll_rollouts.steps[proc],
proc].copy_(new_last_obs)
# Update most recent observations (not necessarily the same)
assert (hier_utils.has_placeholder(
ll_rollouts.recent_obs[proc]))
new_last_obs = hier_utils.update_theta(
ll_rollouts.recent_obs[proc], hl_cpu_actions[proc])
ll_rollouts.recent_obs[proc].copy_(new_last_obs)
assert (ll_rollouts.observations.max().item() < float('inf')
and ll_rollouts.recent_obs.max().item() < float('inf'))
# Given high level action, step through the low level actions
death_step_mask = np.ones([alg_opt['num_processes'],
1]) # 1 means still alive, 0 means dead
hl_reward = torch.zeros([alg_opt['num_processes'], 1])
hl_obs = [None for i in range(alg_opt['num_processes'])]
for ll_step in range(optim_opt['num_ll_steps']):
# Sample actions
start_time = time.time()
with torch.no_grad():
ll_value, ll_action, ll_action_log_prob, ll_states = ll_policy.act(
ll_rollouts.recent_obs,
ll_rollouts.recent_s,
ll_rollouts.recent_masks,
deterministic=ll_deterministic)
ll_cpu_actions = ll_action.squeeze(1).cpu().numpy()
if args.profile:
print('ll act %f' % (time.time() - start_time))
# Observe reward and next obs
raw_obs, ll_reward, done, info = envs.step(
ll_cpu_actions, death_step_mask)
raw_hl_obs, raw_ll_obs, step_counts = hier_utils.seperate_obs(
raw_obs)
ll_obs = []
for proc in range(alg_opt['num_processes']):
if (ll_step
== optim_opt['num_ll_steps'] - 1) or done[proc]:
ll_obs.append(
hier_utils.placeholder_theta(
np.array([raw_ll_obs[proc]]),
np.array([step_counts[proc]])))
else:
ll_obs.append(
hier_utils.append_theta(
np.array([raw_ll_obs[proc]]),
np.array([hl_cpu_actions[proc]]),
np.array([step_counts[proc]])))
ll_obs = np.concatenate(ll_obs, 0)
ll_reward = torch.from_numpy(
np.expand_dims(np.stack(ll_reward), 1)).float()
episode_rewards += ll_reward
hl_reward += ll_reward
# Update values for Q learning and update replay memory
time.time()
hl_next_state_dqn = torch.from_numpy(raw_hl_obs)
hl_reward_dqn = ll_reward
hl_isdone_dqn = done
if args.algo == 'dqn':
hl_agent.update_memory(hl_state_dqn, hl_action_dqn,
hl_next_state_dqn, hl_reward_dqn,
hl_isdone_dqn, death_step_mask)
hl_state_dqn = hl_next_state_dqn
if args.profile:
print('dqn memory %f' % (time.time() - start_time))
# Update high level observations (only take most recent obs if we haven't see a done before now and thus the value is valid)
for proc, raw_hl in enumerate(raw_hl_obs):
if death_step_mask[proc].item() > 0:
hl_obs[proc] = np.array([raw_hl])
# If done then clean the history of observations
masks = torch.FloatTensor([[0.0] if done_ else [1.0]
for done_ in done])
final_rewards *= masks
final_rewards += (
1 - masks
) * episode_rewards # TODO - actually not sure if I broke this logic, but this value is not used anywhere
episode_rewards *= masks
# TODO - I commented this out, which possibly breaks things if num_stack > 1. Fix later if necessary
#if args.cuda:
# masks = masks.cuda()
#if current_obs.dim() == 4:
# current_obs *= masks.unsqueeze(2).unsqueeze(2)
#else:
# current_obs *= masks
# Update low level observations
update_ll_current_obs(ll_obs)
# Update low level rollouts
ll_rollouts.insert(ll_current_obs, ll_states, ll_action,
ll_action_log_prob, ll_value, ll_reward,
masks, death_step_mask)
# Update which ones have stepped to the end and shouldn't be updated next time in the loop
death_step_mask *= masks
# Update high level rollouts
hl_obs = np.concatenate(hl_obs, 0)
update_hl_current_obs(hl_obs)
hl_rollouts.insert(hl_current_obs, hl_states, hl_action,
hl_action_log_prob, hl_value, hl_reward, masks)
# Check if we want to update lowlevel policy
if ll_rollouts.isfull and all([
not hier_utils.has_placeholder(
ll_rollouts.observations[ll_rollouts.steps[proc],
proc])
for proc in range(alg_opt['num_processes'])
]):
# Update low level policy
assert (ll_rollouts.observations.max().item() < float('inf'))
if optim_opt['hierarchical_mode'] == 'train_both':
with torch.no_grad():
ll_next_value = ll_policy.get_value(
ll_rollouts.observations[-1],
ll_rollouts.states[-1],
ll_rollouts.masks[-1]).detach()
ll_rollouts.compute_returns(ll_next_value,
alg_opt['use_gae'],
env_opt['gamma'],
alg_opt['gae_tau'])
ll_value_loss, ll_action_loss, ll_dist_entropy = ll_agent.update(
ll_rollouts)
else:
ll_value_loss = 0
ll_action_loss = 0
ll_dist_entropy = 0
ll_rollouts.after_update()
# Update logger
alg_info = {}
alg_info['value_loss'] = ll_value_loss
alg_info['action_loss'] = ll_action_loss
alg_info['dist_entropy'] = ll_dist_entropy
ll_alg_logger.writerow(alg_info)
ll_alg_f.flush()
# Update high level policy
start_time = time.time()
assert (hl_rollouts.observations.max().item() < float('inf'))
if args.algo == 'dqn':
hl_value_loss, hl_action_loss, hl_dist_entropy = hl_agent.update(
alg_opt['updates_per_step']
) # TODO - maybe log this loss properly
else:
with torch.no_grad():
hl_next_value = hl_policy.get_value(
hl_rollouts.observations[-1], hl_rollouts.states[-1],
hl_rollouts.masks[-1]).detach()
hl_rollouts.compute_returns(hl_next_value, alg_opt['use_gae'],
env_opt['gamma'], alg_opt['gae_tau'])
hl_value_loss, hl_action_loss, hl_dist_entropy = hl_agent.update(
hl_rollouts)
hl_rollouts.after_update()
if args.profile:
print('hl update %f' % (time.time() - start_time))
# Update alg monitor for high level
alg_info = {}
alg_info['value_loss'] = hl_value_loss
alg_info['action_loss'] = hl_action_loss
alg_info['dist_entropy'] = hl_dist_entropy
alg_logger.writerow(alg_info)
alg_f.flush()
# Save checkpoints
total_num_steps = (j + 1) * alg_opt['num_processes'] * alg_opt[
'num_steps'] * optim_opt['num_ll_steps']
if 'save_interval' in alg_opt:
save_interval = alg_opt['save_interval']
else:
save_interval = 100
if j % save_interval == 0:
# Save all of our important information
start_time = time.time()
save_checkpoint(logpath, ll_agent, hl_agent, envs, j,
total_num_steps)
if args.profile:
print('save checkpoint %f' % (time.time() - start_time))
# Print log
log_interval = log_opt['log_interval'] * alg_opt['log_mult']
if j % log_interval == 0:
end = time.time()
print(
"{}: Updates {}, num timesteps {}, FPS {}, mean/median reward {:.1f}/{:.1f}, min/max reward {:.1f}/{:.1f}, entropy {:.5f}, value loss {:.5f}, policy loss {:.5f}"
.format(options['logs']['exp_name'], j, total_num_steps,
int(total_num_steps / (end - start)),
final_rewards.mean(), final_rewards.median(),
final_rewards.min(), final_rewards.max(),
hl_dist_entropy, hl_value_loss, hl_action_loss))
# Do dashboard logging
vis_interval = log_opt['vis_interval'] * alg_opt['log_mult']
if args.vis and j % vis_interval == 0:
try:
# Sometimes monitor doesn't properly flush the outputs
dashboard.visdom_plot()
except IOError:
pass
# Save final checkpoint
save_checkpoint(logpath, ll_agent, hl_agent, envs, j, total_num_steps)
# Close logging file
alg_f.close()
ll_alg_f.close()
def main():
global args
args = parser.parse_args()
args.cuda = not args.no_cuda and torch.cuda.is_available()
args.vis = not args.no_vis
# Set options
if args.path_opt is not None:
with open(args.path_opt, 'r') as handle:
options = yaml.load(handle)
if args.vis_path_opt is not None:
with open(args.vis_path_opt, 'r') as handle:
vis_options = yaml.load(handle)
print('## args'); pprint(vars(args))
print('## options'); pprint(options)
# Load the lowlevel opt and
lowlevel_optfile = options['lowlevel']['optfile']
with open(lowlevel_optfile, 'r') as handle:
ll_opt = yaml.load(handle)
# Whether we should set ll policy to be deterministic or not
ll_deterministic = options['lowlevel']['deterministic']
# Put alg_%s and optim_%s to alg and optim depending on commandline
options['use_cuda'] = args.cuda
options['trial'] = 0
options['alg'] = options['alg_%s' % args.algo]
options['optim'] = options['optim_%s' % args.algo]
alg_opt = options['alg']
alg_opt['algo'] = args.algo
model_opt = options['model']
env_opt = options['env']
env_opt['env-name'] = args.env_name
log_opt = options['logs']
optim_opt = options['optim']
options['lowlevel_opt'] = ll_opt # Save low level options in option file (for logging purposes)
# Pass necessary values in ll_opt
assert(ll_opt['model']['mode'] in ['baseline_lowlevel', 'phase_lowlevel'])
ll_opt['model']['theta_space_mode'] = ll_opt['env']['theta_space_mode']
ll_opt['model']['time_scale'] = ll_opt['env']['time_scale']
# If in many module mode, load the lowlevel policies we want
if model_opt['mode'] == 'hierarchical_many':
# Check asserts
theta_obs_mode = ll_opt['env']['theta_obs_mode']
theta_space_mode = ll_opt['env']['theta_space_mode']
assert(theta_space_mode in ['pretrain_interp', 'pretrain_any', 'pretrain_any_far', 'pretrain_any_fromstart'])
assert(theta_obs_mode == 'pretrain')
# Get the theta size
theta_sz = options['lowlevel']['num_load']
ckpt_base = options['lowlevel']['ckpt']
# Load checkpoints
#lowlevel_ckpts = []
#for ll_ind in range(theta_sz):
# lowlevel_ckpt_file = ckpt_base + '/trial%d/ckpt.pth.tar' % ll_ind
# assert(os.path.isfile(lowlevel_ckpt_file))
# lowlevel_ckpts.append(torch.load(lowlevel_ckpt_file))
# Otherwise it's one ll polciy to load
else:
# Get theta_sz for low level model
theta_obs_mode = ll_opt['env']['theta_obs_mode']
theta_space_mode = ll_opt['env']['theta_space_mode']
assert(theta_obs_mode in ['ind', 'vector'])
if theta_obs_mode == 'ind':
if theta_space_mode == 'forward':
theta_sz = 1
elif theta_space_mode == 'simple_four':
theta_sz = 4
elif theta_space_mode == 'simple_eight':
theta_sz = 8
elif theta_space_mode == 'k_theta':
theta_sz = ll_opt['env']['num_theta']
elif theta_obs_mode == 'vector':
theta_sz = 2
else:
raise NotImplementedError
else:
raise NotImplementedError
ll_opt['model']['theta_sz'] = theta_sz
ll_opt['env']['theta_sz'] = theta_sz
# Load the low level policy params
#lowlevel_ckpt = options['lowlevel']['ckpt']
#assert(os.path.isfile(lowlevel_ckpt))
#lowlevel_ckpt = torch.load(lowlevel_ckpt)
hl_action_space = spaces.Discrete(theta_sz)
# Check asserts
assert(args.algo in ['a2c', 'ppo', 'acktr', 'dqn'])
assert(optim_opt['hierarchical_mode'] in ['train_highlevel', 'train_both'])
if model_opt['recurrent_policy']:
assert args.algo in ['a2c', 'ppo'], 'Recurrent policy is not implemented for ACKTR'
assert(model_opt['mode'] in ['hierarchical', 'hierarchical_many'])
# Set seed - just make the seed the trial number
seed = args.seed + 1000 # Make it different than lowlevel seed
torch.manual_seed(seed)
if args.cuda:
torch.cuda.manual_seed(seed)
# Initialization
torch.set_num_threads(1)
# Print warning
print("#######")
print("WARNING: All rewards are clipped or normalized so you need to use a monitor (see envs.py) or visdom plot to get true rewards")
print("#######")
# Set logging / load previous checkpoint
logpath = args.logdir
# Make directory, check before overwriting
assert not os.path.isdir(logpath), "Give a new directory to save so we don't overwrite anything"
os.system('mkdir -p ' + logpath)
# Load checkpoint
assert(os.path.isfile(args.ckpt))
if args.cuda:
ckpt = torch.load(args.ckpt)
else:
ckpt = torch.load(args.ckpt, map_location=lambda storage, loc: storage)
# Save options and args
with open(os.path.join(logpath, os.path.basename(args.path_opt)), 'w') as f:
yaml.dump(options, f, default_flow_style=False)
with open(os.path.join(logpath, 'args.yaml'), 'w') as f:
yaml.dump(vars(args), f, default_flow_style=False)
# Save git info as well
os.system('git status > %s' % os.path.join(logpath, 'git_status.txt'))
os.system('git diff > %s' % os.path.join(logpath, 'git_diff.txt'))
os.system('git show > %s' % os.path.join(logpath, 'git_show.txt'))
# Set up plotting dashboard
dashboard = Dashboard(options, vis_options, logpath, vis=args.vis, port=args.port)
# Create environments
envs = [make_env(args.env_name, seed, i, logpath, options, not args.no_verbose) for i in range(1)]
if alg_opt['num_processes'] > 1:
envs = SubprocVecEnv(envs)
else:
envs = DummyVecEnv(envs)
# Check if we use timestep in low level
if 'baseline' in ll_opt['model']['mode']:
add_timestep = False
elif 'phase' in ll_opt['model']['mode']:
add_timestep = True
else:
raise NotImplementedError
# Get shapes
dummy_env = make_env(args.env_name, seed, 0, logpath, options, not args.no_verbose)
dummy_env = dummy_env()
s_pro_dummy = dummy_env.unwrapped._get_pro_obs()
s_ext_dummy = dummy_env.unwrapped._get_ext_obs()
if add_timestep:
ll_obs_shape = (s_pro_dummy.shape[0] + theta_sz + 1,)
ll_raw_obs_shape =(s_pro_dummy.shape[0] + 1,)
else:
ll_obs_shape = (s_pro_dummy.shape[0] + theta_sz,)
ll_raw_obs_shape = (s_pro_dummy.shape[0],)
ll_obs_shape = (ll_obs_shape[0] * env_opt['num_stack'], *ll_obs_shape[1:])
hl_obs_shape = (s_ext_dummy.shape[0],)
hl_obs_shape = (hl_obs_shape[0] * env_opt['num_stack'], *hl_obs_shape[1:])
# Do vec normalize, but mask out what we don't want altered
# Also freeze all of the low level obs
ignore_mask = dummy_env.env._get_obs_mask()
freeze_mask, _ = dummy_env.unwrapped._get_pro_ext_mask()
freeze_mask = np.concatenate([freeze_mask, [0]])
if ('normalize' in env_opt and not env_opt['normalize']) or args.algo == 'dqn':
ignore_mask = 1 - freeze_mask
if model_opt['mode'] == 'hierarchical_many':
# Actually ignore both ignored values and the low level values
# That filtering will happen later
ignore_mask = (ignore_mask + freeze_mask > 0).astype(float)
envs = ObservationFilter(envs, ret=alg_opt['norm_ret'], has_timestep=True, noclip=env_opt['step_plus_noclip'], ignore_mask=ignore_mask, freeze_mask=freeze_mask, time_scale=env_opt['time_scale'], gamma=env_opt['gamma'], train=False)
else:
envs = ObservationFilter(envs, ret=alg_opt['norm_ret'], has_timestep=True, noclip=env_opt['step_plus_noclip'], ignore_mask=ignore_mask, freeze_mask=freeze_mask, time_scale=env_opt['time_scale'], gamma=env_opt['gamma'], train=False)
raw_env = envs.venv.envs[0]
# Make our helper object for dealing with hierarchical observations
hier_utils = HierarchyUtils(ll_obs_shape, hl_obs_shape, hl_action_space, theta_sz, add_timestep)
# Set up algo monitoring
alg_filename = os.path.join(logpath, 'Alg.Monitor.csv')
alg_f = open(alg_filename, "wt")
alg_f.write('# Alg Logging %s\n'%json.dumps({"t_start": time.time(), 'env_id' : dummy_env.spec and dummy_env.spec.id, 'mode': options['model']['mode'], 'name': options['logs']['exp_name']}))
alg_fields = ['value_loss', 'action_loss', 'dist_entropy']
alg_logger = csv.DictWriter(alg_f, fieldnames=alg_fields)
alg_logger.writeheader()
alg_f.flush()
ll_alg_filename = os.path.join(logpath, 'AlgLL.Monitor.csv')
ll_alg_f = open(ll_alg_filename, "wt")
ll_alg_f.write('# Alg Logging LL %s\n'%json.dumps({"t_start": time.time(), 'env_id' : dummy_env.spec and dummy_env.spec.id, 'mode': options['model']['mode'], 'name': options['logs']['exp_name']}))
ll_alg_fields = ['value_loss', 'action_loss', 'dist_entropy']
ll_alg_logger = csv.DictWriter(ll_alg_f, fieldnames=ll_alg_fields)
ll_alg_logger.writeheader()
ll_alg_f.flush()
# Create the policy networks
ll_action_space = envs.action_space
if args.algo == 'dqn':
model_opt['eps_start'] = optim_opt['eps_start']
model_opt['eps_end'] = optim_opt['eps_end']
model_opt['eps_decay'] = optim_opt['eps_decay']
hl_policy = DQNPolicy(hl_obs_shape, hl_action_space, model_opt)
else:
hl_policy = Policy(hl_obs_shape, hl_action_space, model_opt)
if model_opt['mode'] == 'hierarchical_many':
ll_policy = ModularPolicy(ll_raw_obs_shape, ll_action_space, theta_sz, ll_opt)
else:
ll_policy = Policy(ll_obs_shape, ll_action_space, ll_opt['model'])
# Load the previous ones here?
if args.cuda:
hl_policy.cuda()
ll_policy.cuda()
# Create the high level agent
if args.algo == 'a2c':
hl_agent = algo.A2C_ACKTR(hl_policy, alg_opt['value_loss_coef'],
alg_opt['entropy_coef'], lr=optim_opt['lr'],
eps=optim_opt['eps'], alpha=optim_opt['alpha'],
max_grad_norm=optim_opt['max_grad_norm'])
elif args.algo == 'ppo':
hl_agent = algo.PPO(hl_policy, alg_opt['clip_param'], alg_opt['ppo_epoch'], alg_opt['num_mini_batch'],
alg_opt['value_loss_coef'], alg_opt['entropy_coef'], lr=optim_opt['lr'],
eps=optim_opt['eps'], max_grad_norm=optim_opt['max_grad_norm'])
elif args.algo == 'acktr':
hl_agent = algo.A2C_ACKTR(hl_policy, alg_opt['value_loss_coef'],
alg_opt['entropy_coef'], acktr=True)
elif args.algo == 'dqn':
hl_agent = algo.DQN(hl_policy, env_opt['gamma'], batch_size=alg_opt['batch_size'], target_update=alg_opt['target_update'],
mem_capacity=alg_opt['mem_capacity'], lr=optim_opt['lr'], eps=optim_opt['eps'], max_grad_norm=optim_opt['max_grad_norm'])
# Create the low level agent
# If only training high level, make dummy agent (just does passthrough, doesn't change anything)
if optim_opt['hierarchical_mode'] == 'train_highlevel':
ll_agent = algo.Passthrough(ll_policy)
elif optim_opt['hierarchical_mode'] == 'train_both':
if args.algo == 'a2c':
ll_agent = algo.A2C_ACKTR(ll_policy, alg_opt['value_loss_coef'],
alg_opt['entropy_coef'], lr=optim_opt['ll_lr'],
eps=optim_opt['eps'], alpha=optim_opt['alpha'],
max_grad_norm=optim_opt['max_grad_norm'])
elif args.algo == 'ppo':
ll_agent = algo.PPO(ll_policy, alg_opt['clip_param'], alg_opt['ppo_epoch'], alg_opt['num_mini_batch'],
alg_opt['value_loss_coef'], alg_opt['entropy_coef'], lr=optim_opt['ll_lr'],
eps=optim_opt['eps'], max_grad_norm=optim_opt['max_grad_norm'])
elif args.algo == 'acktr':
ll_agent = algo.A2C_ACKTR(ll_policy, alg_opt['value_loss_coef'],
alg_opt['entropy_coef'], acktr=True)
else:
raise NotImplementedError
# Make the rollout structures
# Kind of dumb hack to avoid having to deal with rollouts
hl_rollouts = RolloutStorage(10000*args.num_ep, 1, hl_obs_shape, hl_action_space, hl_policy.state_size)
ll_rollouts = MaskingRolloutStorage(alg_opt['num_steps'], 1, ll_obs_shape, ll_action_space, ll_policy.state_size)
hl_current_obs = torch.zeros(1, *hl_obs_shape)
ll_current_obs = torch.zeros(1, *ll_obs_shape)
# Helper functions to update the current obs
def update_hl_current_obs(obs):
shape_dim0 = hl_obs_shape[0]
obs = torch.from_numpy(obs).float()
if env_opt['num_stack'] > 1:
hl_current_obs[:, :-shape_dim0] = hl_current_obs[:, shape_dim0:]
hl_current_obs[:, -shape_dim0:] = obs
def update_ll_current_obs(obs):
shape_dim0 = ll_obs_shape[0]
obs = torch.from_numpy(obs).float()
if env_opt['num_stack'] > 1:
ll_current_obs[:, :-shape_dim0] = ll_current_obs[:, shape_dim0:]
ll_current_obs[:, -shape_dim0:] = obs
# Update agent with loaded checkpoint
# This should update both the policy network and the optimizer
ll_agent.load_state_dict(ckpt['ll_agent'])
hl_agent.load_state_dict(ckpt['hl_agent'])
# Set ob_rms
envs.ob_rms = ckpt['ob_rms']
# Reset our env and rollouts
raw_obs = envs.reset()
hl_obs, raw_ll_obs, step_counts = hier_utils.seperate_obs(raw_obs)
ll_obs = hier_utils.placeholder_theta(raw_ll_obs, step_counts)
update_hl_current_obs(hl_obs)
update_ll_current_obs(ll_obs)
hl_rollouts.observations[0].copy_(hl_current_obs)
ll_rollouts.observations[0].copy_(ll_current_obs)
ll_rollouts.recent_obs.copy_(ll_current_obs)
if args.cuda:
hl_current_obs = hl_current_obs.cuda()
ll_current_obs = ll_current_obs.cuda()
hl_rollouts.cuda()
ll_rollouts.cuda()
# These variables are used to compute average rewards for all processes.
episode_rewards = []
tabbed = False
raw_data = []
# Loop through episodes
step = 0
for ep in range(args.num_ep):
if ep < args.num_vid:
record = True
else:
record = False
# Complete episode
done = False
frames = []
ep_total_reward = 0
num_steps = 0
while not done:
# Step through high level action
start_time = time.time()
with torch.no_grad():
hl_value, hl_action, hl_action_log_prob, hl_states = hl_policy.act(hl_rollouts.observations[step], hl_rollouts.states[step], hl_rollouts.masks[step], deterministic=True)
step += 1
hl_cpu_actions = hl_action.squeeze(1).cpu().numpy()
# Get values to use for Q learning
hl_state_dqn = hl_rollouts.observations[step]
hl_action_dqn = hl_action
# Update last ll observation with new theta
for proc in range(1):
# Update last observations in memory
last_obs = ll_rollouts.observations[ll_rollouts.steps[proc], proc]
if hier_utils.has_placeholder(last_obs):
new_last_obs = hier_utils.update_theta(last_obs, hl_cpu_actions[proc])
ll_rollouts.observations[ll_rollouts.steps[proc], proc].copy_(new_last_obs)
# Update most recent observations (not necessarily the same)
assert(hier_utils.has_placeholder(ll_rollouts.recent_obs[proc]))
new_last_obs = hier_utils.update_theta(ll_rollouts.recent_obs[proc], hl_cpu_actions[proc])
ll_rollouts.recent_obs[proc].copy_(new_last_obs)
assert(ll_rollouts.observations.max().item() < float('inf') and ll_rollouts.recent_obs.max().item() < float('inf'))
# Given high level action, step through the low level actions
death_step_mask = np.ones([1, 1]) # 1 means still alive, 0 means dead
hl_reward = torch.zeros([1, 1])
hl_obs = [None for i in range(1)]
for ll_step in range(optim_opt['num_ll_steps']):
num_steps += 1
# Capture screenshot
if record:
raw_env.render()
if not tabbed:
# GLFW TAB and RELEASE are hardcoded here
raw_env.unwrapped.viewer.cam.distance += 5
raw_env.unwrapped.viewer.cam.lookat[0] += 2.5
#raw_env.unwrapped.viewer.cam.lookat[1] += 2.5
raw_env.render()
tabbed = True
frames.append(raw_env.unwrapped.viewer._read_pixels_as_in_window())
# Sample actions
with torch.no_grad():
ll_value, ll_action, ll_action_log_prob, ll_states = ll_policy.act(ll_rollouts.recent_obs, ll_rollouts.recent_s, ll_rollouts.recent_masks, deterministic=True)
ll_cpu_actions = ll_action.squeeze(1).cpu().numpy()
# Observe reward and next obs
raw_obs, ll_reward, done, info = envs.step(ll_cpu_actions, death_step_mask)
raw_hl_obs, raw_ll_obs, step_counts = hier_utils.seperate_obs(raw_obs)
ll_obs = []
for proc in range(alg_opt['num_processes']):
if (ll_step == optim_opt['num_ll_steps'] - 1) or done[proc]:
ll_obs.append(hier_utils.placeholder_theta(np.array([raw_ll_obs[proc]]), np.array([step_counts[proc]])))
else:
ll_obs.append(hier_utils.append_theta(np.array([raw_ll_obs[proc]]), np.array([hl_cpu_actions[proc]]), np.array([step_counts[proc]])))
ll_obs = np.concatenate(ll_obs, 0)
ll_reward = torch.from_numpy(np.expand_dims(np.stack(ll_reward), 1)).float()
hl_reward += ll_reward
ep_total_reward += ll_reward.item()
# Update high level observations (only take most recent obs if we haven't see a done before now and thus the value is valid)
for proc, raw_hl in enumerate(raw_hl_obs):
if death_step_mask[proc].item() > 0:
hl_obs[proc] = np.array([raw_hl])
# If done then clean the history of observations
masks = torch.FloatTensor([[0.0] if done_ else [1.0] for done_ in done])
#final_rewards *= masks
#final_rewards += (1 - masks) * episode_rewards # TODO - actually not sure if I broke this logic, but this value is not used anywhere
#episode_rewards *= masks
# Done is actually a bool for eval since it's just one process
done = done.item()
if not done:
last_hl_obs = np.array(hl_obs)
# TODO - I commented this out, which possibly breaks things if num_stack > 1. Fix later if necessary
#if args.cuda:
# masks = masks.cuda()
#if current_obs.dim() == 4:
# current_obs *= masks.unsqueeze(2).unsqueeze(2)
#else:
# current_obs *= masks
# Update low level observations
update_ll_current_obs(ll_obs)
# Update low level rollouts
ll_rollouts.insert(ll_current_obs, ll_states, ll_action, ll_action_log_prob, ll_value, ll_reward, masks, death_step_mask)
# Update which ones have stepped to the end and shouldn't be updated next time in the loop
death_step_mask *= masks
# Update high level rollouts
hl_obs = np.concatenate(hl_obs, 0)
update_hl_current_obs(hl_obs)
hl_rollouts.insert(hl_current_obs, hl_states, hl_action, hl_action_log_prob, hl_value, hl_reward, masks)
# Check if we want to update lowlevel policy
if ll_rollouts.isfull and all([not hier_utils.has_placeholder(ll_rollouts.observations[ll_rollouts.steps[proc], proc]) for proc in range(alg_opt['num_processes'])]):
# Update low level policy
assert(ll_rollouts.observations.max().item() < float('inf'))
ll_value_loss = 0
ll_action_loss = 0
ll_dist_entropy = 0
ll_rollouts.after_update()
# Update logger
#alg_info = {}
#alg_info['value_loss'] = ll_value_loss
#alg_info['action_loss'] = ll_action_loss
#alg_info['dist_entropy'] = ll_dist_entropy
#ll_alg_logger.writerow(alg_info)
#ll_alg_f.flush()
# Update alg monitor for high level
#alg_info = {}
#alg_info['value_loss'] = hl_value_loss
#alg_info['action_loss'] = hl_action_loss
#alg_info['dist_entropy'] = hl_dist_entropy
#alg_logger.writerow(alg_info)
#alg_f.flush()
# Save video
if record:
for fr_ind, fr in enumerate(frames):
scipy.misc.imsave(os.path.join(logpath, 'tmp_fr_%d.jpg' % fr_ind), fr)
os.system("ffmpeg -r 20 -i %s/" % logpath + "tmp_fr_%01d.jpg -y " + "%s/results_ep%d.mp4" % (logpath, ep))
os.system("rm %s/tmp_fr*.jpg" % logpath)
# Do dashboard logging for each epsiode
try:
dashboard.visdom_plot()
except IOError:
pass
# Print / dump reward for episode
# DEBUG for thetas
#print("Theta %d" % env.venv.envs[0].env.env.theta)
print("Total reward for episode %d: %f" % (ep, ep_total_reward))
print("Episode length: %d" % num_steps)
print(last_hl_obs)
print("----------")
episode_rewards.append(ep_total_reward)
# Close logging file
alg_f.close()
ll_alg_f.close()