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train.py
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train.py
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import argparse
import multiprocessing
import os
import pdb
import pickle
import matplotlib.pyplot as plt
import numpy as np
from timebudget import timebudget
from itertools import repeat
import wandb
from linkage_gym.envs.Mech import Mech
from linkage_gym.utils.env_utils import normalize_curve, uniquify
from utils.utils import linear_schedule
from models.a2c import CustomActorCriticPolicy
from models.dqn import CustomDQN, CustomDQNPolicy
from models.gcpn import GNN
from models.random_search import random_search
from utils.utils import evaluate_policy, cmaes
# from stable_baselines3.common.evaluation import evaluate_policy
from stable_baselines3 import A2C, PPO # , HER, PPO1, PPO2, TRPO
from stable_baselines3.common.env_util import make_vec_env
from stable_baselines3.common.vec_env import DummyVecEnv, SubprocVecEnv
from stable_baselines3.common.callbacks import CheckpointCallback, BaseCallback
from datetime import datetime
import time
import warnings
# warnings.simplefilter("ignore")
# def fxn():
# warnings.warn("invalid", RuntimeWarning)
#! NEW
import concurrent.futures
def random_search_wrapper(args):
return random_search(*args)
@timebudget
def main(parameters):
# parameters["body_constraints = [-3., 3., 0., 3.]
# parameters["coupler_constraints = [-3., 3., -3., 0.]
now = datetime.now().strftime("%m_%d_%Y_%HD:%M:%S")
day = datetime.now().strftime("%m_%d_%Y")
## Use WANDB for logging
os.environ["WANDB_MODE"] = parameters["wandb_mode"]
## Learn model N times
for trial in range(parameters["num_trials"]):
## Initialize WANBD for Logging
run = wandb.init(project=parameters["wandb_project"],
entity='mfogelson',
sync_tensorboard=True,
)
## Adds all of the arguments as config variables
wandb.config.update(parameters)
## Log / eval / save location
tb_log_dir = f"./logs/{parameters['goal_filename']}/{parameters['model']}/{day}/{run.id}"
eval_dir = f"./evaluations/{parameters['goal_filename']}/{parameters['model']}/{day}/"
save_dir = f"./trained/{parameters['goal_filename']}/{parameters['model']}/{day}/"
design_dir = f"./designs/{parameters['goal_filename']}/{parameters['model']}/{day}/"
if not os.path.isdir(tb_log_dir):
os.makedirs(tb_log_dir, exist_ok=True)
if not os.path.isdir(eval_dir):
os.makedirs(eval_dir, exist_ok=True)
if not os.path.isdir(save_dir):
os.makedirs(save_dir, exist_ok=True)
if not os.path.isdir(design_dir):
os.makedirs(design_dir, exist_ok=True)
## Load Goal information
goal_curve = pickle.load(open(f'{parameters["goal_path"]}/{parameters["goal_filename"]}.pkl', 'rb')) # NOTE: sometimes ordering needs to be reversed add [:,::-1]
parameters["sample_points"] = goal_curve.shape[1]
print("Goal Curve Shape: ", goal_curve.shape)
# idx = np.round(np.linspace(0, goal_curve.shape[1] - 1, parameters["sample_points"])).astype(int)
goal = normalize_curve(goal_curve) #R@normalize_curve(goal_curve[:,::-1][:,idx])
# goal[:, -1] = goal[:, 0]
## Initialize Gym ENV
env_kwargs = {"max_nodes":parameters["max_nodes"],
"bound":parameters["bound"],
"resolution":parameters["resolution"],
"sample_points":parameters["sample_points"],
"feature_points": parameters["feature_points"],
"goal":goal,
"normalize":parameters["normalize"],
# "seed": parameters["seed+trial,
"fixed_initial_state": parameters["fixed_initial_state"],
"ordered_distance": parameters["ordered"],
"constraints": [], #[parameters["body_constraints, parameters["coupler_constraints],
"self_loops": parameters["use_self_loops"],
"use_node_type": parameters["use_node_type"],
"min_nodes": 6,
"debug": False}
# If PPO A2C or DQN can use multiple envs while training
if parameters["model"] in ['PPO', 'A2C', 'DQN']:
env = make_vec_env(Mech, n_envs=parameters["n_envs"], env_kwargs=env_kwargs, seed=parameters["seed"], vec_env_cls=SubprocVecEnv, vec_env_kwargs={'start_method': 'fork'}) # NOTE: For faster training use SubProcVecEnv
else:
env = []
for i in range(parameters["n_envs"]):
env_kwargs['seed'] = i+parameters["seed"]
env.append(Mech(**env_kwargs))
## GNN Args
gnn_kwargs = {
"max_nodes": parameters["max_nodes"],
"num_features": 2*parameters["feature_points"]+int(parameters["use_node_type"]),
"hidden_channels":64,
"out_channels":64,
"normalize":False,
"batch_normalization":parameters["batch_normalize"],
"lin":True,
"add_loop":False}
## Policy Architecture
dqn_arch = [64, 256, 1024, 4096]
ppo_arch = [64, dict(vf=[32], pi=[256, 1024, 4096])] ## NOTE: Not used
if parameters["model"] == "DQN":
policy_kwargs = dict(
features_extractor_class=GNN,
features_extractor_kwargs=gnn_kwargs,
net_arch=dqn_arch,
)
else:
policy_kwargs = dict(
features_extractor_class=GNN,
features_extractor_kwargs=gnn_kwargs,
net_arch=dqn_arch,
)
## Initialize Model
if parameters["model"] == "DQN":
assert parameters["save_freq"] > parameters["update_freq"]//parameters["n_envs"]
model = CustomDQN(policy=CustomDQNPolicy,
env=env,
learning_rate=parameters["lr"],
buffer_size=parameters["buffer_size"], # 1e6
learning_starts=1,
batch_size=parameters["batch_size"],
tau=1.0, # the soft update coefficient (“Polyak update”, between 0 and 1)
gamma=parameters["gamma"],
train_freq=(parameters["update_freq"]//parameters["n_envs"], "step"),
gradient_steps=parameters["opt_iter"],
replay_buffer_class=None,
replay_buffer_kwargs=None,
optimize_memory_usage=False,
# target_update_interval=500,
exploration_fraction=0.5, # percent of learning that includes exploration
exploration_initial_eps=1.0, # Initial random search
exploration_final_eps=0.2, # final stochasticity
max_grad_norm=10.,
tensorboard_log=tb_log_dir,
create_eval_env=False,
policy_kwargs=policy_kwargs,
verbose=parameters["verbose"],
seed=parameters["seed"]+trial,
device=parameters["cuda"],
_init_setup_model=True)
elif parameters["model"] == "PPO":
model = PPO(policy=CustomActorCriticPolicy,
env=env,
learning_rate= linear_schedule(parameters["lr"]),
n_steps=parameters["update_freq"]//parameters["n_envs"],
batch_size=parameters["batch_size"],
n_epochs=parameters["opt_iter"],
gamma=parameters["gamma"],
gae_lambda=0.95,
clip_range=parameters["eps_clip"],
clip_range_vf=None,
# normalize_advantage=True,
ent_coef=parameters["ent_coef"],
vf_coef=0.5,
max_grad_norm=0.5,
use_sde=False,
sde_sample_freq=-1,
target_kl=None,
tensorboard_log=tb_log_dir,
create_eval_env=False,
policy_kwargs=policy_kwargs,
verbose=parameters["verbose"],
seed=parameters["seed"]+trial,
device=parameters["cuda"],
_init_setup_model=True)
elif parameters["model"] == "A2C":
model = A2C(policy=CustomActorCriticPolicy,
env=env,
learning_rate=parameters["lr"],
n_steps=parameters["update_freq"]//parameters["n_envs"],
gamma=parameters["gamma"],
gae_lambda=0.95,
ent_coef=0.01,
vf_coef=0.5,
max_grad_norm=0.5,
rms_prop_eps=1e-5,
use_rms_prop=True,
use_sde=False,
sde_sample_freq=-1,
normalize_advantage=False,
tensorboard_log=tb_log_dir,
create_eval_env=False,
policy_kwargs=policy_kwargs,
verbose=parameters["verbose"],
seed=parameters["seed"]+trial,
device=parameters["cuda"],
_init_setup_model=True)
elif parameters["model"] in ["random", "Random"]:
print("Starting random search ...")
evaluation_rewards = []
evaluation_designs = []
# for _ in range(parameters["m_evals):
output = []
# for e in env:
# output.append(random_search(e, parameters["n_eval_episodes))
st = time.time()
max_processes = max(min(parameters["n_envs"], os.cpu_count() // 2), 1)
# with multiprocessing.Pool(max_processes) as p:
# output = p.starmap(random_search, zip(env, repeat(parameters["n_eval_episodes"])))
with concurrent.futures.ThreadPoolExecutor() as executor:
output = executor.map(random_search_wrapper, zip(env, repeat(parameters["n_eval_episodes"])))
print(f"Finished random search...{time.time()-st}")
# import pdb
# pdb.set_trace()
# p.close()
best_designs = []
rewards = []
designs = []
lengths = []
for o in output:
best_designs.append(o[0])
rewards.append(o[1])
designs.append(o[2])
lengths.append(o[3])
# best_designs = sum(best_designs, [])
rewards = sum(rewards, [])
designs = sum(designs, [])
lengths = sum(lengths, [])
wandb.log({
'eval/mean_episode_rew': np.mean((rewards)),
'eval/std_episode_rew': np.std((rewards)),
'eval/median_episode_rew': np.median((rewards)),
'eval/mean_episode_lengths': np.mean((lengths)),
'eval/std_episode_lengths': np.std((lengths)),
'eval/median_episode_lengths': np.median((lengths)),})
evaluation_rewards.append(rewards)
evaluation_designs.append(designs)
best_dict = {}
rewards = {}
for o in best_designs:
for k, v in o.items():
if k not in best_dict:
best_dict[k] = v
rewards[k] = v[-1]
continue
if v[-1] > best_dict[k][-1]:
best_dict[k] = v
rewards[k] = v[-1]
# node_info = [list(o.values()) for o in best_designs]
node_info = best_dict.values() # sum(node_info, [])
## Log average reward
if rewards:
for k, v in rewards.items():
wandb.log({
'Reward Best Designs': v, 'Number of Loops': k})
best_cmaes = {}
## Plot Best Designs
figs = []
for node_positions, edges, _ in node_info:
env_kwargs['node_positions'] = node_positions
env_kwargs['edges'] = edges
tmp_env = Mech(**env_kwargs)
tmp_env.is_terminal = True
reward = tmp_env._get_reward()
# rewards.append(reward[0])
number_of_cycles = tmp_env.number_of_cycles()
# number_of_cycles_.append(number_of_cycles)
# pdb.set_trace()
fig = tmp_env.paper_plotting()
plt.rcParams['font.size'] = 10
fig.suptitle(f'Algo: {parameters["model"]} | ID: {run.id} |\n Reward: {np.round(reward[0], 3)} | Number Of Cycles: {number_of_cycles}')
## Log images
wandb.log({'best_designs': wandb.Image(fig)})
figs.append(fig)
plt.close(fig)
if parameters["cmaes"]:
cma_env = cmaes(tmp_env, sigma=0.000055, tolfun=0.00001)
reward = cma_env._get_reward()
n = cma_env.number_of_nodes()
best_cmaes[number_of_cycles] = [cma_env.paths[:n,:,0], cma_env.get_edges(), cma_env.goal, cma_env.total_dist]
fig = cma_env.paper_plotting()
plt.rcParams['font.size'] = 10
fig.suptitle(f'Algo: {parameters["model"]} | ID: {run.id} |\n Reward: {np.round(reward[0], 3)} | Number Of Cycles: {number_of_cycles}')
## Log images
wandb.log({'best_designs_cmaes': wandb.Image(fig)})
figs.append(fig)
plt.close(fig)
#TODO Toggle this
# pickle.dump([evaluation_rewards, evaluation_designs], open(f"evaluations/evaluation_{parameters['model']}_{parameters['goal_filename']}_{parameters['n_eval_episodes']*parameters['n_envs']}_{parameters['m_evals']}_{run.id}.pkl", 'wb'))
train = not parameters["no_train"] ## TODO
print(f"Training set to: {train}")
## Load old checkpoint
if parameters["checkpoint"]:
print('Loading Checkpoint ...')
model = model.load(parameters["checkpoint"])
# train = False
## Learn
if parameters["model"] in ["DQN", 'A2C', 'PPO']:
if train:
print("Starting Training...")
# Save a checkpoint
callback = CheckpointCallback(save_freq=parameters["save_freq"]//parameters["n_envs"], save_path=save_dir, name_prefix=f'{now}_{parameters["model"]}_model_{parameters["goal_filename"]}')
model.learn(parameters["steps"], log_interval=5, reset_num_timesteps=False, callback=callback)
print("Finished Training...")
print("Saving Model...")
model.save(save_dir + f'{now}_{parameters["model"]}_model_{parameters["goal_filename"]}_final.zip')
# import pdb
# pdb.set_trace()
## Evaluate Model
evaluation_rewards = []
evaluation_designs = []
for i in range(parameters["m_evals"]):
## Initialize model seed
model.set_random_seed(seed=i+parameters["seed"])
print("Evaluating Model...")
rewards, lengths, designs = evaluate_policy(model, env, n_eval_episodes=parameters["n_eval_episodes"], deterministic=False, render=False, return_episode_rewards=True) ## TODO: update
wandb.log({
'eval/mean_episode_rew': np.mean((rewards)),
'eval/std_episode_rew': np.std((rewards)),
'eval/median_episode_rew': np.median((rewards)),
'eval/mean_episode_lengths': np.mean((lengths)),
'eval/std_episode_lengths': np.std((lengths)),
'eval/median_episode_lengths': np.median((lengths)),})
evaluation_rewards.append(rewards)
evaluation_designs.append(designs)
print("Saving Evaluation Designs...")
## TODO toggle this feature
# pickle.dump([evaluation_rewards, evaluation_designs], open(eval_dir + f"{now}_{parameters['model']}_{parameters['goal_filename']}_{parameters['n_eval_episodes']}_{parameters['m_evals']}_{run.id}.pkl", 'wb'))
## Extract Best Designs
if parameters["model"] in ["PPO", "A2C", "DQN"]: best_designs = env.get_attr('best_designs')
if isinstance(best_designs, list):
# pdb.set_trace()
best_dict = {}
rewards = {}
for o in best_designs:
for k, v in o.items():
if k not in best_dict:
best_dict[k] = v
rewards[k] = v[-1]
continue
if v[-1] > best_dict[k][-1]:
best_dict[k] = v
rewards[k] = v[-1]
# node_info = [list(o.values()) for o in best_designs]
node_info = best_dict.values() # sum(node_info, [])
elif isinstance(best_designs, dict):
node_info = best_designs.values()
best_cmaes = {}
## Plot Best Designs
figs = []
for node_positions, edges, _ in node_info:
env_kwargs['node_positions'] = node_positions
env_kwargs['edges'] = edges
tmp_env = Mech(**env_kwargs)
tmp_env.is_terminal = True
reward = tmp_env._get_reward()
# rewards.append(reward[0])
number_of_cycles = tmp_env.number_of_cycles()
# number_of_cycles_.append(number_of_cycles)
# pdb.set_trace()
fig = tmp_env.paper_plotting()
plt.rcParams['font.size'] = 10
fig.suptitle(f'Algo: {parameters["model"]} | ID: {run.id} |\n Reward: {np.round(reward[0], 3)} | Number Of Cycles: {number_of_cycles}')
## Log images
wandb.log({'best_designs': wandb.Image(fig)})
figs.append(fig)
plt.close(fig)
if parameters["cmaes"]:
cma_env = cmaes(tmp_env, sigma=0.000055, tolfun=0.00001)
reward = cma_env._get_reward()
n = cma_env.number_of_nodes()
best_cmaes[number_of_cycles] = [cma_env.paths[:n,:,0], cma_env.get_edges(), cma_env.goal, cma_env.total_dist]
fig = cma_env.paper_plotting()
plt.rcParams['font.size'] = 10
fig.suptitle(f'Algo: {parameters["model"]} | ID: {run.id} |\n Reward: {np.round(reward[0], 3)} | Number Of Cycles: {number_of_cycles}')
## Log images
wandb.log({'best_designs_cmaes': wandb.Image(fig)})
figs.append(fig)
plt.close(fig)
## Log average reward
if rewards:
for k, v in rewards.items():
wandb.log({
'Reward Best Designs': v, 'Number of Loops': k})
# 'Standard Deviation Reward Best Designs': np.std(list(rewards.values())),
# 'Median Reward Best Designs': np.median(list(rewards.values())),})
## Save Designs
if best_designs:
pickle.dump(best_dict, open(uniquify(design_dir+f'best_designs_{run.id}.pkl'), 'wb'))
if best_cmaes:
pickle.dump(best_cmaes, open(uniquify(design_dir+f'best_designs_cmaes_{run.id}.pkl'), 'wb'))
run.finish()
return env_kwargs, best_dict, best_cmaes
# time.sleep(1)
if __name__ == "__main__":
# Initialize the parser
parser = argparse.ArgumentParser(formatter_class=argparse.ArgumentDefaultsHelpFormatter)
# Add parameters positional/optional
# default_path = 'data/training_seeds.pkl'
## Env Args
parser.add_argument('--max_nodes', default=11, type=int, help="Maximum number of revolute joints on linkage graph\n (default: %(default)s, type: %(type)s)")
parser.add_argument('--resolution', default=11, type=int, help="Resolution of scaffold nodes (default: %(default)s, type: %(type)s)")
parser.add_argument('--bound', default=1.0, type=float, help="Bound for linkage graph design [-bound, bound] (default: %(default)s, type: %(type)s)")
parser.add_argument('--sample_points', default=20, type=int, help="Numbder of points to sample the trajectories of revolute joints (default: %(default)s, type: %(type)s)")
parser.add_argument('--feature_points', default=1, type=int, help="Number of feature points for node vector used in GNN (default: %(default)s, type: %(type)s)")
parser.add_argument('--goal_filename', default='jansen_traj', type=str, help="Goal filename (default: %(default)s, type: %(type)s)")
parser.add_argument('--goal_path', default='data/other_curves', type=str, help="Path to goal file (default: %(default)s, type: %(type)s)")
parser.add_argument('--use_self_loops', default=False, action='store_true', help="Add self-loops in adj matrix (default: %(default)s, type: %(type)s)")
parser.add_argument('--normalize', default=False, action='store_true', help="Normalize trajectory for feature vector (default: %(default)s, type: %(type)s)")
parser.add_argument('--use_node_type', default=False, action='store_true', help="Use node type id for feature vector (default: %(default)s, type: %(type)s)")
parser.add_argument('--fixed_initial_state', default=False, action='store_true', help="Use same initial design state for all training (default: %(default)s, type: %(type)s)")
parser.add_argument('--seed', default=123, type=int, help="Random seed for numpy and gym (default: %(default)s, type: %(type)s)")
parser.add_argument('--ordered', default=True, action='store_true', help="Get minimum ordered distance (default: %(default)s, type: %(type)s)")
parser.add_argument('--body_constraints', default=None, type=float, nargs='+',help="Constraint on Non-coupler revolute joints[xmin, xmax, ymin, ymax] (default: %(default)s, type: %(type)s)")
parser.add_argument('--coupler_constraints', default=None, type=float, nargs='+',help="Constraint on Coupler joint [xmin, xmax, ymin, ymax] (default: %(default)s, type: %(type)s)")
## Feature Extractor Args
parser.add_argument('--use_gnn', default=True, action='store_true', help="Use GNN feature embedding (default: %(default)s, type: %(type)s)")
parser.add_argument('--batch_normalize', default=True, action='store_true', help="Use batch normalization in GNN (default: %(default)s, type: %(type)s)")
## Model Args
parser.add_argument('--model', default="PPO", type=str, help="Select which model type to use Models=[DQN, A2C, PPO, random] (default: %(default)s, type: %(type)s)")
parser.add_argument('--n_envs', default=1, type=int, help="Number of parallel environments to run (default: %(default)s, type: %(type)s)")
parser.add_argument('--checkpoint', default=None, type=str, help='Load a previous model checkpoint (default: %(default)s, type: %(type)s)')
parser.add_argument('--update_freq', default=1000, type=int, help="How often to update the model (default: %(default)s, type: %(type)s)")
parser.add_argument('--opt_iter', default=1, type=int, help="How many gradient steps per update (default: %(default)s, type: %(type)s)")
parser.add_argument('--eps_clip', default=0.2, type=float, help="PPO epsilon clipping (default: %(default)s, type: %(type)s)")
parser.add_argument('--ent_coef', default=0.01, type=float, help="PPO epsilon clipping (default: %(default)s, type: %(type)s)")
parser.add_argument('--gamma', default=0.99, type=float, help="Discount factor (default: %(default)s, type: %(type)s)")
parser.add_argument('--lr', default=0.0001, type=float, help="Learning rate (default: %(default)s, type: %(type)s)")
parser.add_argument('--batch_size', default=1000, type=int, help="Batch Size for Dataloader (default: %(default)s, type: %(type)s)")
parser.add_argument('--buffer_size', default=1000000, type=int, help="Buffer size for DQN (default: %(default)s, type: %(type)s)")
## Training Args
parser.add_argument('--steps', default=50000, type=int, help='The number of steps to train (default: %(default)s, type: %(type)s)')
parser.add_argument('--num_trials', default=1, type=int, help="How many times to run a training of the model (default: %(default)s, type: %(type)s)")
## Evaluation Args
parser.add_argument('--n_eval_episodes', default=100, type=int, help='The number of epochs to evaluate the model (default: %(default)s, type: %(type)s)')
parser.add_argument('--m_evals', default=1, type=int, help="How many times to run the evaluation with varying seeds (default: %(default)s, type: %(type)s)")
## Other Args
parser.add_argument('--log_freq', default=1000, type=int, help="How often to log training values (default: %(default)s, type: %(type)s)")
parser.add_argument('--save_freq', default=10000, type=int, help="How often to save instances of model, buffer and render (default: %(default)s, type: %(type)s)")
parser.add_argument('--wandb_mode', default="online", type=str, help="use weights and biases to log information Modes=[online, offline, disabled] (default: %(default)s, type: %(type)s)")
parser.add_argument('--wandb_project', default="linkage_sb4", type=str, help="Set weights and biases project name (default: %(default)s, type: %(type)s)")
parser.add_argument('--verbose', default=0, type=int, help="verbose from sb3")
parser.add_argument('--cuda', default='cuda:1', type=str, help="Which GPU to use [cpu, cuda:0, cuda:1, cuda:2, cuda:3] (default: %(default)s, type: %(type)s)")
parser.add_argument('--no_train', default=False, action='store_true', help="If you don't want to train (default: %(default)s, type: %(type)s)")
parser.add_argument('--cmaes', default=False, action='store_true', help="Further optimize best designs found with CMA-ES node optimization (default: %(default)s, type: %(type)s)")
# Parse the arguments
args = parser.parse_args()
print(list(vars(args).keys()))
print(list(vars(args).values()))
# pdb.set_trace()
# Display Args
print(args)
# path = f"./trained/{parameters["goal_filename}/{parameters["model}/06_15_2022/"
# parameters["checkpoint = path+os.listdir(path)[0]
# print("CHECKPOINT LOCATION: ", parameters["checkpoint)
# sys.settrace(trace)
main(vars(args))