def create_rail_env(env_params, tree_observation):
n_agents = env_params.n_agents
x_dim = env_params.x_dim
y_dim = env_params.y_dim
n_cities = env_params.n_cities
max_rails_between_cities = env_params.max_rails_between_cities
max_rails_in_city = env_params.max_rails_in_city
seed = env_params.seed
# Break agents from time to time
malfunction_parameters = MalfunctionParameters(
malfunction_rate=env_params.malfunction_rate,
min_duration=20,
max_duration=50)
return RailEnv(
width=x_dim,
height=y_dim,
rail_generator=sparse_rail_generator(
max_num_cities=n_cities,
grid_mode=False,
max_rails_between_cities=max_rails_between_cities,
max_rails_in_city=max_rails_in_city),
schedule_generator=sparse_schedule_generator(),
number_of_agents=n_agents,
malfunction_generator_and_process_data=malfunction_from_params(
malfunction_parameters),
obs_builder_object=tree_observation,
random_seed=seed)
def test_malfunction_before_entry():
"""Tests that malfunctions are working properly for agents before entering the environment!"""
# Set fixed malfunction duration for this test
stochastic_data = MalfunctionParameters(malfunction_rate=2, # Rate of malfunction occurence
min_duration=10, # Minimal duration of malfunction
max_duration=10 # Max duration of malfunction
)
rail, rail_map = make_simple_rail2()
env = RailEnv(width=25,
height=30,
rail_generator=rail_from_grid_transition_map(rail),
schedule_generator=random_schedule_generator(),
number_of_agents=10,
malfunction_generator_and_process_data=malfunction_from_params(stochastic_data),
obs_builder_object=SingleAgentNavigationObs()
)
env.reset(False, False, False, random_seed=10)
env.agents[0].target = (0, 0)
# Test initial malfunction values for all agents
# we want some agents to be malfuncitoning already and some to be working
# we want different next_malfunction values for the agents
assert env.agents[0].malfunction_data['malfunction'] == 0
assert env.agents[1].malfunction_data['malfunction'] == 10
assert env.agents[2].malfunction_data['malfunction'] == 0
assert env.agents[3].malfunction_data['malfunction'] == 10
assert env.agents[4].malfunction_data['malfunction'] == 10
assert env.agents[5].malfunction_data['malfunction'] == 10
assert env.agents[6].malfunction_data['malfunction'] == 10
assert env.agents[7].malfunction_data['malfunction'] == 10
assert env.agents[8].malfunction_data['malfunction'] == 10
assert env.agents[9].malfunction_data['malfunction'] == 10
def test_malfunction_values_and_behavior():
"""
Test the malfunction counts down as desired
Returns
-------
"""
# Set fixed malfunction duration for this test
rail, rail_map = make_simple_rail2()
action_dict: Dict[int, RailEnvActions] = {}
stochastic_data = MalfunctionParameters(malfunction_rate=0.001, # Rate of malfunction occurence
min_duration=10, # Minimal duration of malfunction
max_duration=10 # Max duration of malfunction
)
env = RailEnv(width=25,
height=30,
rail_generator=rail_from_grid_transition_map(rail),
schedule_generator=random_schedule_generator(),
number_of_agents=1,
malfunction_generator_and_process_data=malfunction_from_params(stochastic_data),
obs_builder_object=SingleAgentNavigationObs()
)
env.reset(False, False, activate_agents=True, random_seed=10)
# Assertions
assert_list = [9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 10, 9, 8, 7, 6, 5]
print("[")
for time_step in range(15):
# Move in the env
env.step(action_dict)
# Check that next_step decreases as expected
assert env.agents[0].malfunction_data['malfunction'] == assert_list[time_step]
def train_validate_env_generator_params(train_set,
n_agents,
x_dim,
y_dim,
observation,
stochastic_data,
speed_ration_map,
seed=1):
if train_set:
random_seed = np.random.randint(1000)
else:
random_seed = np.random.randint(1000, 2000)
random.seed(random_seed)
np.random.seed(random_seed)
env = RailEnv(
width=x_dim,
height=y_dim,
rail_generator=sparse_rail_generator(
max_num_cities=3,
# Number of cities in map (where train stations are)
seed=seed, # Random seed
grid_mode=False,
max_rails_between_cities=2,
max_rails_in_city=3),
schedule_generator=sparse_schedule_generator(speed_ration_map),
number_of_agents=n_agents,
malfunction_generator_and_process_data=malfunction_from_params(
stochastic_data),
# Malfunction data generator
obs_builder_object=observation)
return env, random_seed
def test_malfanction_from_params():
"""
Test loading malfunction from
Returns
-------
"""
stochastic_data = MalfunctionParameters(
malfunction_rate=1000, # Rate of malfunction occurence
min_duration=2, # Minimal duration of malfunction
max_duration=5 # Max duration of malfunction
)
rail, rail_map = make_simple_rail2()
env = RailEnv(
width=25,
height=30,
rail_generator=rail_from_grid_transition_map(rail),
schedule_generator=random_schedule_generator(),
number_of_agents=10,
malfunction_generator_and_process_data=malfunction_from_params(
stochastic_data))
env.reset()
assert env.malfunction_process_data.malfunction_rate == 1000
assert env.malfunction_process_data.min_duration == 2
assert env.malfunction_process_data.max_duration == 5
def env(self):
# obs builder
obs_builder_object = self.obs_builder_dict[self.obs_builder]
env = RailEnv(
width=self.width, # width和height是网格grid的数量
height=self.height,
rail_generator=sparse_rail_generator(
max_num_cities=self.max_num_cities,
# Number of cities in map (where train stations are)
seed=19, # Random seed
grid_mode=True,
max_rails_between_cities=2,
max_rails_in_city=2,
),
schedule_generator=sparse_schedule_generator(
self.speed_ration_map),
number_of_agents=self.number_of_agents,
malfunction_generator_and_process_data=malfunction_from_params(
self.stochastic_data),
# Malfunction data generator
obs_builder_object=obs_builder_object,
remove_agents_at_target=False,
record_steps=True)
return env
def test_malfunction_process():
# Set fixed malfunction duration for this test
stochastic_data = MalfunctionParameters(
malfunction_rate=1, # Rate of malfunction occurence
min_duration=3, # Minimal duration of malfunction
max_duration=3 # Max duration of malfunction
)
rail, rail_map = make_simple_rail2()
env = RailEnv(
width=25,
height=30,
rail_generator=rail_from_grid_transition_map(rail),
schedule_generator=random_schedule_generator(),
number_of_agents=1,
malfunction_generator_and_process_data=malfunction_from_params(
stochastic_data),
obs_builder_object=SingleAgentNavigationObs())
obs, info = env.reset(False, False, True, random_seed=10)
agent_halts = 0
total_down_time = 0
agent_old_position = env.agents[0].position
# Move target to unreachable position in order to not interfere with test
env.agents[0].target = (0, 0)
for step in range(100):
actions = {}
for i in range(len(obs)):
actions[i] = np.argmax(obs[i]) + 1
obs, all_rewards, done, _ = env.step(actions)
if env.agents[0].malfunction_data['malfunction'] > 0:
agent_malfunctioning = True
else:
agent_malfunctioning = False
if agent_malfunctioning:
# Check that agent is not moving while malfunctioning
assert agent_old_position == env.agents[0].position
agent_old_position = env.agents[0].position
total_down_time += env.agents[0].malfunction_data['malfunction']
# Check that the appropriate number of malfunctions is achieved
assert env.agents[0].malfunction_data[
'nr_malfunctions'] == 23, "Actual {}".format(
env.agents[0].malfunction_data['nr_malfunctions'])
# Check that malfunctioning data was standing around
assert total_down_time > 0
def _launch(self):
rail_generator = sparse_rail_generator(
seed=self._config['seed'],
max_num_cities=self._config['max_num_cities'],
grid_mode=self._config['grid_mode'],
max_rails_between_cities=self._config['max_rails_between_cities'],
max_rails_in_city=self._config['max_rails_in_city'])
malfunction_generator = no_malfunction_generator()
if {
'malfunction_rate', 'malfunction_min_duration',
'malfunction_max_duration'
} <= self._config.keys():
stochastic_data = {
'malfunction_rate': self._config['malfunction_rate'],
'min_duration': self._config['malfunction_min_duration'],
'max_duration': self._config['malfunction_max_duration']
}
malfunction_generator = malfunction_from_params(stochastic_data)
speed_ratio_map = None
if 'speed_ratio_map' in self._config:
speed_ratio_map = {
float(k): float(v)
for k, v in self._config['speed_ratio_map'].items()
}
schedule_generator = sparse_schedule_generator(speed_ratio_map)
env = None
try:
env = RailEnv(
width=self._config['width'],
height=self._config['height'],
rail_generator=rail_generator,
schedule_generator=schedule_generator,
number_of_agents=self._config['number_of_agents'],
malfunction_generator_and_process_data=malfunction_generator,
obs_builder_object=self._observation.builder(),
remove_agents_at_target=False,
random_seed=self._config['seed'],
# Should Below line be commented as here the env tries different configs,
# hence opening it can be wasteful, morever the render has to be closed
use_renderer=self._env_config.get('render'))
env.reset()
except ValueError as e:
logging.error("=" * 50)
logging.error(f"Error while creating env: {e}")
logging.error("=" * 50)
return env
def test_malfunction_process_statistically():
"""Tests that malfunctions are produced by stochastic_data!"""
# Set fixed malfunction duration for this test
stochastic_data = MalfunctionParameters(
malfunction_rate=1 / 5, # Rate of malfunction occurence
min_duration=5, # Minimal duration of malfunction
max_duration=5 # Max duration of malfunction
)
rail, rail_map = make_simple_rail2()
env = RailEnv(
width=25,
height=30,
rail_generator=rail_from_grid_transition_map(rail),
schedule_generator=random_schedule_generator(),
number_of_agents=10,
malfunction_generator_and_process_data=malfunction_from_params(
stochastic_data),
obs_builder_object=SingleAgentNavigationObs())
env.reset(True, True, False, random_seed=10)
env.agents[0].target = (0, 0)
# Next line only for test generation
# agent_malfunction_list = [[] for i in range(10)]
agent_malfunction_list = [
[0, 0, 0, 0, 5, 4, 3, 2, 1, 0, 5, 4, 3, 2, 1, 0, 0, 0, 5, 4],
[0, 5, 4, 3, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 5, 4, 3, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 5, 4, 3, 2, 1, 0, 5, 4, 3, 2, 1, 0, 0, 5, 4, 3, 2],
[0, 0, 0, 0, 5, 4, 3, 2, 1, 0, 0, 0, 0, 0, 0, 5, 4, 3, 2, 1],
[0, 0, 5, 4, 3, 2, 1, 0, 0, 5, 4, 3, 2, 1, 0, 5, 4, 3, 2, 1],
[0, 0, 0, 0, 0, 0, 0, 0, 5, 4, 3, 2, 1, 0, 0, 0, 0, 0, 0, 0],
[5, 4, 3, 2, 1, 0, 0, 5, 4, 3, 2, 1, 0, 0, 0, 0, 0, 0, 0, 5],
[5, 4, 3, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 4, 3, 2],
[5, 4, 3, 2, 1, 0, 0, 0, 0, 0, 5, 4, 3, 2, 1, 0, 0, 0, 5, 4]
]
for step in range(20):
action_dict: Dict[int, RailEnvActions] = {}
for agent_idx in range(env.get_num_agents()):
# We randomly select an action
action_dict[agent_idx] = RailEnvActions(np.random.randint(4))
# For generating tests only:
# agent_malfunction_list[agent_idx].append(env.agents[agent_idx].malfunction_data['malfunction'])
assert env.agents[agent_idx].malfunction_data[
'malfunction'] == agent_malfunction_list[agent_idx][step]
env.step(action_dict)
def _launch(self, env_params, observation):
return RailEnv(
width=env_params.x_dim,
height=env_params.y_dim,
rail_generator=sparse_rail_generator(
max_num_cities=env_params.n_cities,
grid_mode=False,
max_rails_between_cities=env_params.max_rails_between_cities,
max_rails_in_city=env_params.max_rails_in_city,
seed=env_params.seed
),
schedule_generator=sparse_schedule_generator(env_params.speed_profiles),
number_of_agents=env_params.n_agents,
malfunction_generator_and_process_data=malfunction_from_params(env_params.malfunction_parameters),
obs_builder_object=observation,
random_seed=env_params.seed
)
def random_sparse_env_small(random_seed, max_width, max_height, observation_builder):
random.seed(random_seed)
size = random.randint(0, 5)
width = 20 + size * 5
height = 20 + size * 5
nr_cities = 2 + size // 2 + random.randint(0, 2)
nr_trains = min(nr_cities * 5, 5 + random.randint(0, 5)) # , 10 + random.randint(0, 10))
max_rails_between_cities = 2
max_rails_in_cities = 3 + random.randint(0, size)
malfunction_rate = 30 + random.randint(0, 100)
malfunction_min_duration = 3 + random.randint(0, 7)
malfunction_max_duration = 20 + random.randint(0, 80)
rail_generator = sparse_rail_generator(max_num_cities=nr_cities, seed=random_seed, grid_mode=False,
max_rails_between_cities=max_rails_between_cities,
max_rails_in_city=max_rails_in_cities)
# new version:
# stochastic_data = MalfunctionParameters(malfunction_rate, malfunction_min_duration, malfunction_max_duration)
stochastic_data = {'malfunction_rate': malfunction_rate, 'min_duration': malfunction_min_duration,
'max_duration': malfunction_max_duration}
schedule_generator = sparse_schedule_generator({1.: 0.25, 1. / 2.: 0.25, 1. / 3.: 0.25, 1. / 4.: 0.25})
while width <= max_width and height <= max_height:
try:
env = RailEnv(width=width, height=height, rail_generator=rail_generator,
schedule_generator=schedule_generator, number_of_agents=nr_trains,
malfunction_generator_and_process_data=malfunction_from_params(stochastic_data),
obs_builder_object=observation_builder, remove_agents_at_target=False)
print("[{}] {}x{} {} cities {} trains, max {} rails between cities, max {} rails in cities. Malfunction rate {}, {} to {} steps.".format(
random_seed, width, height, nr_cities, nr_trains, max_rails_between_cities,
max_rails_in_cities, malfunction_rate, malfunction_min_duration, malfunction_max_duration
))
return env
except ValueError as e:
logging.error(f"Error: {e}")
width += 5
height += 5
logging.info("Try again with larger env: (w,h):", width, height)
logging.error(f"Unable to generate env with seed={random_seed}, max_width={max_height}, max_height={max_height}")
return None
def create_and_save_env(file_name: str, schedule_generator: ScheduleGenerator,
rail_generator: RailGenerator):
stochastic_data = MalfunctionParameters(
malfunction_rate=1000, # Rate of malfunction occurence
min_duration=15, # Minimal duration of malfunction
max_duration=50 # Max duration of malfunction
)
env = RailEnv(
width=30,
height=30,
rail_generator=rail_generator,
schedule_generator=schedule_generator,
number_of_agents=10,
malfunction_generator_and_process_data=malfunction_from_params(
stochastic_data),
remove_agents_at_target=True)
env.reset(True, True)
#env.save(file_name)
RailEnvPersister.save(env, file_name)
def _launch(self):
rail_generator = self.get_rail_generator()
malfunction_generator = no_malfunction_generator()
if {'malfunction_rate', 'min_duration', 'max_duration'
} <= self._config.keys():
stochastic_data = {
'malfunction_rate': self._config['malfunction_rate'],
'min_duration': self._config['malfunction_min_duration'],
'max_duration': self._config['malfunction_max_duration']
}
malfunction_generator = malfunction_from_params(stochastic_data)
speed_ratio_map = None
if 'speed_ratio_map' in self._config:
speed_ratio_map = {
float(k): float(v)
for k, v in self._config['speed_ratio_map'].items()
}
schedule_generator = sparse_schedule_generator(speed_ratio_map)
env = None
try:
env = RailEnv(
width=self._config['width'],
height=self._config['height'],
rail_generator=rail_generator,
schedule_generator=schedule_generator,
number_of_agents=self._config['number_of_agents'],
malfunction_generator_and_process_data=malfunction_generator,
obs_builder_object=self._observation.builder(),
remove_agents_at_target=False,
random_seed=self._config['seed'])
env.reset()
except ValueError as e:
logging.error("=" * 50)
logging.error(f"Error while creating env: {e}")
logging.error("=" * 50)
return env
def __init__(self,
n_cars=3,
n_acts=5,
min_obs=-1,
max_obs=1,
n_nodes=2,
ob_radius=10,
x_dim=36,
y_dim=36,
feats='all'):
self.tree_obs = tree_observation.TreeObservation(n_nodes)
self.n_cars = n_cars
self.n_nodes = n_nodes
self.ob_radius = ob_radius
self.feats = feats
rail_gen = sparse_rail_generator(max_num_cities=3,
seed=666,
grid_mode=False,
max_rails_between_cities=2,
max_rails_in_city=3)
self._rail_env = RailEnv(
width=x_dim,
height=y_dim,
rail_generator=rail_gen,
schedule_generator=sparse_schedule_generator(speed_ration_map),
number_of_agents=n_cars,
malfunction_generator_and_process_data=malfunction_from_params(
stochastic_data),
obs_builder_object=self.tree_obs)
self.renderer = RenderTool(self._rail_env, gl="PILSVG")
self.action_dict = dict()
self.info = dict()
self.old_obs = dict()
def test_initial_malfunction():
stochastic_data = MalfunctionParameters(malfunction_rate=1000, # Rate of malfunction occurence
min_duration=2, # Minimal duration of malfunction
max_duration=5 # Max duration of malfunction
)
rail, rail_map = make_simple_rail2()
env = RailEnv(width=25,
height=30,
rail_generator=rail_from_grid_transition_map(rail),
schedule_generator=random_schedule_generator(seed=10),
number_of_agents=1,
malfunction_generator_and_process_data=malfunction_from_params(stochastic_data),
# Malfunction data generator
obs_builder_object=SingleAgentNavigationObs()
)
# reset to initialize agents_static
env.reset(False, False, True, random_seed=10)
print(env.agents[0].malfunction_data)
env.agents[0].target = (0, 5)
set_penalties_for_replay(env)
replay_config = ReplayConfig(
replay=[
Replay(
position=(3, 2),
direction=Grid4TransitionsEnum.EAST,
action=RailEnvActions.MOVE_FORWARD,
set_malfunction=3,
malfunction=3,
reward=env.step_penalty # full step penalty when malfunctioning
),
Replay(
position=(3, 2),
direction=Grid4TransitionsEnum.EAST,
action=RailEnvActions.MOVE_FORWARD,
malfunction=2,
reward=env.step_penalty # full step penalty when malfunctioning
),
# malfunction stops in the next step and we're still at the beginning of the cell
# --> if we take action MOVE_FORWARD, agent should restart and move to the next cell
Replay(
position=(3, 2),
direction=Grid4TransitionsEnum.EAST,
action=RailEnvActions.MOVE_FORWARD,
malfunction=1,
reward=env.step_penalty
), # malfunctioning ends: starting and running at speed 1.0
Replay(
position=(3, 2),
direction=Grid4TransitionsEnum.EAST,
action=RailEnvActions.MOVE_FORWARD,
malfunction=0,
reward=env.start_penalty + env.step_penalty * 1.0 # running at speed 1.0
),
Replay(
position=(3, 3),
direction=Grid4TransitionsEnum.EAST,
action=RailEnvActions.MOVE_FORWARD,
malfunction=0,
reward=env.step_penalty # running at speed 1.0
)
],
speed=env.agents[0].speed_data['speed'],
target=env.agents[0].target,
initial_position=(3, 2),
initial_direction=Grid4TransitionsEnum.EAST,
)
run_replay_config(env, [replay_config])
height=config[test].as_int('height'),
rail_generator=sparse_rail_generator(
max_num_cities=config[test].as_int('max_num_cities'),
seed=config[test].as_int('seed'),
grid_mode=grid_distribution_of_cities,
max_rails_between_cities=config[test].as_int(
'max_rails_between_cities'),
max_rails_in_city=config[test].as_int('max_rail_in_city')),
schedule_generator=schedule_generator,
number_of_agents=config[test].as_int('num_agents'),
obs_builder_object=observation_builder,
malfunction_generator_and_process_data=malfunction_from_params(
parameters={
'malfunction_rate': config[test].as_int(
'malfunction_rate'
), # Rate of malfunction occurrence of single agent
'min_duration': config[test].as_int(
'min_duration'), # Minimal duration of malfunction
'max_duration': config[test].as_int(
'max_duration') # Max duration of malfunction
}),
remove_agents_at_target=True)
obs, info = env.reset(True, True)
# Initiate the renderer
env_renderer = RenderTool(
env,
gl="PILSVG",
agent_render_variant=AgentRenderVariant.AGENT_SHOWS_OPTIONS_AND_BOX,
show_debug=True,
screen_height=1080,
def create_test_env(fnParams, nTest, sDir):
(seed, width, height, nr_trains, nr_cities, max_rails_between_cities,
max_rails_in_cities, malfunction_rate, malfunction_min_duration,
malfunction_max_duration) = fnParams(nTest)
#if not ShouldRunTest(test_id):
# continue
rail_generator = sparse_rail_generator(
max_num_cities=nr_cities,
seed=seed,
grid_mode=False,
max_rails_between_cities=max_rails_between_cities,
max_rails_in_city=max_rails_in_cities,
)
#stochastic_data = {'malfunction_rate': malfunction_rate,
# 'min_duration': malfunction_min_duration,
# 'max_duration': malfunction_max_duration
# }
stochastic_data = MalfunctionParameters(
malfunction_rate=malfunction_rate,
min_duration=malfunction_min_duration,
max_duration=malfunction_max_duration)
observation_builder = GlobalObsForRailEnv()
DEFAULT_SPEED_RATIO_MAP = {
1.: 0.25,
1. / 2.: 0.25,
1. / 3.: 0.25,
1. / 4.: 0.25
}
schedule_generator = sparse_schedule_generator(DEFAULT_SPEED_RATIO_MAP)
for iAttempt in range(5):
try:
env = RailEnv(
width=width,
height=height,
rail_generator=rail_generator,
schedule_generator=schedule_generator,
number_of_agents=nr_trains,
malfunction_generator_and_process_data=malfunction_from_params(
stochastic_data),
obs_builder_object=observation_builder,
remove_agents_at_target=True)
obs = env.reset(random_seed=seed)
break
except ValueError as oErr:
print("Error:", oErr)
width += 5
height += 5
print("Try again with larger env: (w,h):", width, height)
if not os.path.exists(sDir):
os.makedirs(sDir)
sfName = "{}/Level_{}.mpk".format(sDir, nTest)
if os.path.exists(sfName):
os.remove(sfName)
env.save(sfName)
sys.stdout.write(".")
sys.stdout.flush()
return env
def eval_policy(env_params, checkpoint, n_eval_episodes, max_steps,
action_size, state_size, seed, render, allow_skipping,
allow_caching):
# Evaluation is faster on CPU (except if you use a really huge policy)
parameters = {'use_gpu': False}
policy = DDDQNPolicy(state_size,
action_size,
Namespace(**parameters),
evaluation_mode=True)
policy.qnetwork_local = torch.load(checkpoint)
env_params = Namespace(**env_params)
# Environment parameters
n_agents = env_params.n_agents
x_dim = env_params.x_dim
y_dim = env_params.y_dim
n_cities = env_params.n_cities
max_rails_between_cities = env_params.max_rails_between_cities
max_rails_in_city = env_params.max_rails_in_city
# Malfunction and speed profiles
# TODO pass these parameters properly from main!
malfunction_parameters = MalfunctionParameters(
malfunction_rate=1. / 2000, # Rate of malfunctions
min_duration=20, # Minimal duration
max_duration=50 # Max duration
)
# Only fast trains in Round 1
speed_profiles = {
1.: 1.0, # Fast passenger train
1. / 2.: 0.0, # Fast freight train
1. / 3.: 0.0, # Slow commuter train
1. / 4.: 0.0 # Slow freight train
}
# Observation parameters
observation_tree_depth = env_params.observation_tree_depth
observation_radius = env_params.observation_radius
observation_max_path_depth = env_params.observation_max_path_depth
# Observation builder
predictor = ShortestPathPredictorForRailEnv(observation_max_path_depth)
tree_observation = TreeObsForRailEnv(max_depth=observation_tree_depth,
predictor=predictor)
# Setup the environment
env = RailEnv(
width=x_dim,
height=y_dim,
rail_generator=sparse_rail_generator(
max_num_cities=n_cities,
grid_mode=False,
max_rails_between_cities=max_rails_between_cities,
max_rails_in_city=max_rails_in_city,
),
schedule_generator=sparse_schedule_generator(speed_profiles),
number_of_agents=n_agents,
malfunction_generator_and_process_data=malfunction_from_params(
malfunction_parameters),
obs_builder_object=tree_observation)
if render:
env_renderer = RenderTool(env, gl="PGL")
action_dict = dict()
scores = []
completions = []
nb_steps = []
inference_times = []
preproc_times = []
agent_times = []
step_times = []
for episode_idx in range(n_eval_episodes):
seed += 1
inference_timer = Timer()
preproc_timer = Timer()
agent_timer = Timer()
step_timer = Timer()
step_timer.start()
obs, info = env.reset(regenerate_rail=True,
regenerate_schedule=True,
random_seed=seed)
step_timer.end()
agent_obs = [None] * env.get_num_agents()
score = 0.0
if render:
env_renderer.set_new_rail()
final_step = 0
skipped = 0
nb_hit = 0
agent_last_obs = {}
agent_last_action = {}
for step in range(max_steps - 1):
if allow_skipping and check_if_all_blocked(env):
# FIXME why -1? bug where all agents are "done" after max_steps!
skipped = max_steps - step - 1
final_step = max_steps - 2
n_unfinished_agents = sum(not done[idx]
for idx in env.get_agent_handles())
score -= skipped * n_unfinished_agents
break
agent_timer.start()
for agent in env.get_agent_handles():
if obs[agent] and info['action_required'][agent]:
if agent in agent_last_obs and np.all(
agent_last_obs[agent] == obs[agent]):
nb_hit += 1
action = agent_last_action[agent]
else:
preproc_timer.start()
norm_obs = normalize_observation(
obs[agent],
tree_depth=observation_tree_depth,
observation_radius=observation_radius)
preproc_timer.end()
inference_timer.start()
action = policy.act(norm_obs, eps=0.0)
inference_timer.end()
action_dict.update({agent: action})
if allow_caching:
agent_last_obs[agent] = obs[agent]
agent_last_action[agent] = action
agent_timer.end()
step_timer.start()
obs, all_rewards, done, info = env.step(action_dict)
step_timer.end()
if render:
env_renderer.render_env(show=True,
frames=False,
show_observations=False,
show_predictions=False)
if step % 100 == 0:
print("{}/{}".format(step, max_steps - 1))
for agent in env.get_agent_handles():
score += all_rewards[agent]
final_step = step
if done['__all__']:
break
normalized_score = score / (max_steps * env.get_num_agents())
scores.append(normalized_score)
tasks_finished = sum(done[idx] for idx in env.get_agent_handles())
completion = tasks_finished / max(1, env.get_num_agents())
completions.append(completion)
nb_steps.append(final_step)
inference_times.append(inference_timer.get())
preproc_times.append(preproc_timer.get())
agent_times.append(agent_timer.get())
step_times.append(step_timer.get())
skipped_text = ""
if skipped > 0:
skipped_text = "\t⚡ Skipped {}".format(skipped)
hit_text = ""
if nb_hit > 0:
hit_text = "\t⚡ Hit {} ({:.1f}%)".format(nb_hit, (100 * nb_hit) /
(n_agents * final_step))
print(
"☑️ Score: {:.3f} \tDone: {:.1f}% \tNb steps: {:.3f} "
"\t🍭 Seed: {}"
"\t🚉 Env: {:.3f}s "
"\t🤖 Agent: {:.3f}s (per step: {:.3f}s) \t[preproc: {:.3f}s \tinfer: {:.3f}s]"
"{}{}".format(normalized_score, completion * 100.0, final_step,
seed, step_timer.get(), agent_timer.get(),
agent_timer.get() / final_step, preproc_timer.get(),
inference_timer.get(), skipped_text, hit_text))
return scores, completions, nb_steps, agent_times, step_times
def eval_policy(env_params, checkpoint, n_eval_episodes, max_steps,
action_size, state_size, seed, render, allow_skipping,
allow_caching):
# Evaluation is faster on CPU (except if you use a really huge policy)
parameters = {'use_gpu': False}
# policy = DDDQNPolicy(state_size, action_size, Namespace(**parameters), evaluation_mode=True)
# policy.qnetwork_local = torch.load(checkpoint, map_location={'cuda:0': 'cpu'})
env_params = Namespace(**env_params)
# Environment parameters
n_agents = env_params.n_agents
x_dim = env_params.x_dim
y_dim = env_params.y_dim
n_cities = env_params.n_cities
max_rails_between_cities = env_params.max_rails_between_cities
max_rails_in_city = env_params.max_rails_in_city
agents = []
for agent_id in range(n_agents):
agent = AttentionAgent(num_in_pol=state_size,
num_out_pol=action_size,
hidden_dim=256,
lr=0.001)
agent.policy = torch.load(os.path.join(
checkpoint, f'2300_agent{agent_id}' + '.pth'),
map_location=torch.device('cpu'))
agent.policy.eval()
agents.append(agent)
# Malfunction and speed profiles
# TODO pass these parameters properly from main!
malfunction_parameters = MalfunctionParameters(
malfunction_rate=1. / 2000, # Rate of malfunctions
min_duration=20, # Minimal duration
max_duration=50 # Max duration
)
# Only fast trains in Round 1
speed_profiles = {
1.: 1.0, # Fast passenger train
1. / 2.: 0.0, # Fast freight train
1. / 3.: 0.0, # Slow commuter train
1. / 4.: 0.0 # Slow freight train
}
# Observation parameters
observation_tree_depth = env_params.observation_tree_depth
observation_radius = env_params.observation_radius
observation_max_path_depth = env_params.observation_max_path_depth
# Observation builder
predictor = ShortestPathPredictorForRailEnv(observation_max_path_depth)
tree_observation = TreeObsForRailEnv(max_depth=observation_tree_depth,
predictor=predictor)
# Setup the environment
env = RailEnv(
width=x_dim,
height=y_dim,
rail_generator=sparse_rail_generator(
max_num_cities=n_cities,
grid_mode=False,
max_rails_between_cities=max_rails_between_cities,
max_rails_in_city=max_rails_in_city,
),
# rail_generator = complex_rail_generator(
# nr_start_goal=10,
# nr_extra=10,
# min_dist=10,
# max_dist=99999,
# seed=1
# ),
schedule_generator=sparse_schedule_generator(speed_profiles),
number_of_agents=n_agents,
malfunction_generator_and_process_data=malfunction_from_params(
malfunction_parameters),
obs_builder_object=tree_observation)
if render:
# env_renderer = RenderTool(env, gl="PGL")
env_renderer = RenderTool(
env,
# gl="PGL",
agent_render_variant=AgentRenderVariant.
AGENT_SHOWS_OPTIONS_AND_BOX,
show_debug=False,
screen_height=600, # Adjust these parameters to fit your resolution
screen_width=800)
action_dict = dict()
scores = []
completions = []
nb_steps = []
inference_times = []
preproc_times = []
agent_times = []
step_times = []
for agent_id in range(n_agents):
action_dict[agent_id] = 0
for episode_idx in range(n_eval_episodes):
images = []
seed += 1
inference_timer = Timer()
preproc_timer = Timer()
agent_timer = Timer()
step_timer = Timer()
step_timer.start()
obs, info = env.reset(regenerate_rail=True,
regenerate_schedule=True,
random_seed=seed)
step_timer.end()
agent_obs = [None] * env.get_num_agents()
score = 0.0
if render:
env_renderer.set_new_rail()
final_step = 0
skipped = 0
nb_hit = 0
agent_last_obs = {}
agent_last_action = {}
for step in range(max_steps - 1):
# time.sleep(0.2)
if allow_skipping and check_if_all_blocked(env):
# FIXME why -1? bug where all agents are "done" after max_steps!
skipped = max_steps - step - 1
final_step = max_steps - 2
n_unfinished_agents = sum(not done[idx]
for idx in env.get_agent_handles())
score -= skipped * n_unfinished_agents
break
agent_timer.start()
for agent in env.get_agent_handles():
agent_model = agents[agent]
if obs[agent] and info['action_required'][agent]:
if agent in agent_last_obs and np.all(
agent_last_obs[agent] == obs[agent]):
nb_hit += 1
action = agent_last_action[agent]
else:
preproc_timer.start()
norm_obs = normalize_observation(
obs[agent],
tree_depth=observation_tree_depth,
observation_radius=observation_radius)
preproc_timer.end()
inference_timer.start()
action = act(agent_model, norm_obs)
inference_timer.end()
action_dict.update({agent: action})
if allow_caching:
agent_last_obs[agent] = obs[agent]
agent_last_action[agent] = action
agent_timer.end()
step_timer.start()
obs, all_rewards, done, info = env.step(action_dict)
step_timer.end()
if render:
env_renderer.render_env(show=True,
frames=False,
show_observations=False,
show_predictions=False)
im = env_renderer.get_image()
im = PIL.Image.fromarray(im)
images.append(im)
if step % 100 == 0:
print("{}/{}".format(step, max_steps - 1))
for agent in env.get_agent_handles():
score += all_rewards[agent]
final_step = step
if done['__all__']:
break
if render:
for _ in range(10):
images.append(images[len(images) - 1])
# save video
images[0].save(
f'/Users/nikhilvs/repos/nyu/flatland-reinforcement-learning/videos/maac-final/out_{episode_idx}.gif',
save_all=True,
append_images=images[1:],
optimize=False,
duration=60,
loop=0)
normalized_score = score / (max_steps * env.get_num_agents())
scores.append(normalized_score)
tasks_finished = sum(done[idx] for idx in env.get_agent_handles())
completion = tasks_finished / max(1, env.get_num_agents())
completions.append(completion)
nb_steps.append(final_step)
inference_times.append(inference_timer.get())
preproc_times.append(preproc_timer.get())
agent_times.append(agent_timer.get())
step_times.append(step_timer.get())
skipped_text = ""
if skipped > 0:
skipped_text = "\t⚡ Skipped {}".format(skipped)
hit_text = ""
if nb_hit > 0:
hit_text = "\t⚡ Hit {} ({:.1f}%)".format(nb_hit, (100 * nb_hit) /
(n_agents * final_step))
print(
"☑️ Score: {:.3f} \tDone: {:.1f}% \tNb steps: {:.3f} "
"\t🍭 Seed: {}"
"\t🚉 Env: {:.3f}s "
"\t🤖 Agent: {:.3f}s (per step: {:.3f}s) \t[preproc: {:.3f}s \tinfer: {:.3f}s]"
"{}{}".format(normalized_score, completion * 100.0, final_step,
seed, step_timer.get(), agent_timer.get(),
agent_timer.get() / final_step, preproc_timer.get(),
inference_timer.get(), skipped_text, hit_text))
return scores, completions, nb_steps, agent_times, step_times
def main(argv):
try:
opts, args = getopt.getopt(argv, "n:", ["n_trials="])
except getopt.GetoptError:
print('test_navigation_single_agent.py -n <n_trials>')
sys.exit(2)
for opt, arg in opts:
if opt in ('-n', '--n_trials'):
n_trials = int(arg)
random.seed(1)
np.random.seed(1)
######## TEST SET SELECTION - PARAMETERS ########
test_multi_agent_setup = 1 # 1 for Medium size test, 2 for Big size test
test_n_agents = 5 # Number of agents to test (3 - 5 - 7 for Medium, 5 - 7 - 10 for Big)
test_malfunctions_enabled = True # Malfunctions enabled?
test_agents_one_speed = True # Test agents with the same speed (1) or with 4 different speeds?
#################################################
# Medium size
if test_multi_agent_setup == 1:
x_dim = 16*3
y_dim = 9*3
max_num_cities = 5
max_rails_between_cities = 2
max_rails_in_city = 3
# Big size
if test_multi_agent_setup == 2:
x_dim = 16*4
y_dim = 9*4
max_num_cities = 9
max_rails_between_cities = 5
max_rails_in_city = 5
stochastic_data = {'malfunction_rate': 80, # Rate of malfunction occurence of single agent
'min_duration': 15, # Minimal duration of malfunction
'max_duration': 50 # Max duration of malfunction
}
# Custom observation builder
tree_depth = 2
TreeObservation = TreeObsForRailEnv(max_depth=tree_depth, predictor = ShortestPathPredictorForRailEnv(20))
np.savetxt(fname=path.join('NetsTest' , 'info.txt'), X=[x_dim,y_dim,test_n_agents,max_num_cities,max_rails_between_cities,max_rails_in_city,tree_depth],delimiter=';')
# Different agent types (trains) with different speeds.
if test_agents_one_speed:
speed_ration_map = {1.: 1., # Fast passenger train
1. / 2.: 0.0, # Fast freight train
1. / 3.: 0.0, # Slow commuter train
1. / 4.: 0.0} # Slow freight train
else:
speed_ration_map = {1.: 0.25, # Fast passenger train
1. / 2.: 0.25, # Fast freight train
1. / 3.: 0.25, # Slow commuter train
1. / 4.: 0.25} # Slow freight train
if test_malfunctions_enabled:
env = RailEnv(width=x_dim,
height=y_dim,
rail_generator=sparse_rail_generator(max_num_cities=max_num_cities,
# Number of cities in map (where train stations are)
seed=14, # Random seed
grid_mode=False,
max_rails_between_cities=max_rails_between_cities,
max_rails_in_city=max_rails_in_city),
schedule_generator=sparse_schedule_generator(speed_ration_map),
malfunction_generator_and_process_data=malfunction_from_params(stochastic_data),
number_of_agents=test_n_agents,
obs_builder_object=TreeObservation)
else:
env = RailEnv(width=x_dim,
height=y_dim,
rail_generator=sparse_rail_generator(max_num_cities=max_num_cities,
# Number of cities in map (where train stations are)
seed=14, # Random seed
grid_mode=False,
max_rails_between_cities=max_rails_between_cities,
max_rails_in_city=max_rails_in_city),
schedule_generator=sparse_schedule_generator(speed_ration_map),
number_of_agents=test_n_agents,
obs_builder_object=TreeObservation)
env.reset()
#env_renderer = RenderTool(env, gl="PILSVG", )
env_renderer = RenderTool(env, gl="PILSVG",
agent_render_variant=AgentRenderVariant.AGENT_SHOWS_OPTIONS_AND_BOX,
show_debug=False,
screen_height=(1080*0.8), # Adjust these parameters to fit your resolution
screen_width=(1920*0.8))
num_features_per_node = env.obs_builder.observation_dim
nr_nodes = 0
for i in range(tree_depth + 1):
nr_nodes += np.power(4, i)
state_size = num_features_per_node * nr_nodes
action_size = 5
# We set the number of episodes we would like to train on
if 'n_trials' not in locals():
n_trials = 15000
# max_steps computation
speed_weighted_mean = 0
for key in speed_ration_map.keys():
speed_weighted_mean += key * speed_ration_map[key]
#max_steps = int(3 * (env.height + env.width))
max_steps = int((1/speed_weighted_mean) * 3 * (env.height + env.width))
#eps = 1.
#eps_end = 0.005
#eps_decay = 0.9995
# And some variables to keep track of the performance
action_dict = dict()
final_action_dict = dict()
action_prob_list = []
scores_window = deque(maxlen=100)
done_window = deque(maxlen=100)
scores = []
scores_list = []
deadlock_list =[]
dones_list_window = []
dones_list = []
action_prob = [0] * action_size
agent_obs = [None] * env.get_num_agents()
agent_next_obs = [None] * env.get_num_agents() # Useless
agent = Agent(state_size, action_size)
# LOAD MODEL WEIGHTS TO TEST
agent.qnetwork_local.load_state_dict(torch.load(path.join('NetsTest' , 'navigator_checkpoint3800_multi10_deadlock_global10.pth')))
record_images = False
frame_step = 0
for trials in range(1, n_trials + 1):
# Reset environment
obs, info = env.reset()#(True, True)
env_renderer.reset()
# Build agent specific observations
for a in range(env.get_num_agents()):
agent_obs[a] = agent_obs[a] = normalize_observation(obs[a], tree_depth, observation_radius=10)
# Reset score and done
score = 0
env_done = 0
# Run episode
for step in range(max_steps):
# Action
for a in range(env.get_num_agents()):
if info['action_required'][a]:
action = agent.act(agent_obs[a], eps=0.)
action_prob[action] += 1
else:
action = 0
action_dict.update({a: action})
# Environment step
obs, all_rewards, done, deadlocks, info = env.step(action_dict)
env_renderer.render_env(show=True, show_predictions=True, show_observations=False)
# Build agent specific observations and normalize
for a in range(env.get_num_agents()):
if obs[a]:
agent_obs[a] = normalize_observation(obs[a], tree_depth, observation_radius=10)
score += all_rewards[a] / env.get_num_agents()
if done['__all__']:
break
# Collection information about training
tasks_finished = 0
for _idx in range(env.get_num_agents()):
if done[_idx] == 1:
tasks_finished += 1
done_window.append(tasks_finished / max(1, env.get_num_agents()))
scores_window.append(score / max_steps) # save most recent score
scores.append(np.mean(scores_window))
dones_list.append(tasks_finished / max(1, env.get_num_agents()))
dones_list_window.append((np.mean(done_window)))
scores_list.append(score / max_steps)
deadlock_list.append(deadlocks.count(1)/max(1, env.get_num_agents()))
if (np.sum(action_prob) == 0):
action_prob_normalized = [0] * action_size
else:
action_prob_normalized = action_prob / np.sum(action_prob)
print(
'\rTesting {} Agents on ({},{}).\t Episode {}\t Score: {:.3f}\tDones: {:.2f}%\tDeadlocks: {:.2f}\t Action Probabilities: \t {}'.format(
env.get_num_agents(), x_dim, y_dim,
trials,
score / max_steps,
100 * tasks_finished / max(1, env.get_num_agents()),
deadlocks.count(1)/max(1, env.get_num_agents()),
action_prob_normalized), end=" ")
#if trials % 100 == 0:
action_prob_list.append(action_prob_normalized)
action_prob = [0] * action_size
if trials % 50 == 0:
np.savetxt(fname=path.join('NetsTest' , 'test_metrics.csv'), X=np.transpose(np.asarray([scores_list,scores,dones_list,dones_list_window,deadlock_list])), delimiter=';',newline='\n')
np.savetxt(fname=path.join('NetsTest' , 'test_action_prob.csv'), X=np.asarray(action_prob_list), delimiter=';',newline='\n')
speed_ration_map = {1.: 1., # Fast passenger train
1. / 2.: 0.0, # Fast freight train
1. / 3.: 0.0, # Slow commuter train
1. / 4.: 0.0} # Slow freight train
env = RailEnv(width=x_dim,
height=y_dim,
rail_generator=sparse_rail_generator(max_num_cities=3,
# Number of cities in map (where train stations are)
seed=1, # Random seed
grid_mode=False,
max_rails_between_cities=2,
max_rails_in_city=4),
schedule_generator=sparse_schedule_generator(speed_ration_map),
number_of_agents=n_agents,
malfunction_generator_and_process_data=malfunction_from_params(stochastic_data),
obs_builder_object=TreeObservation)
env.reset()
env_renderer = RenderTool(env, gl="PILSVG", )
num_features_per_node = env.obs_builder.observation_dim
tree_depth = 2
nr_nodes = 0
for i in range(tree_depth + 1):
nr_nodes += np.power(4, i)
state_size = num_features_per_node * nr_nodes
action_size = 5
# We set the number of episodes we would like to train on
if 'n_trials' not in locals():
def test(args, T, ep, dqn, val_mem, metrics, results_dir, evaluate=False):
# Init env and set in evaluation mode
# Maps speeds to % of appearance in the env
speed_ration_map = {
1.: 0.25, # Fast passenger train
1. / 2.: 0.25, # Fast freight train
1. / 3.: 0.25, # Slow commuter train
1. / 4.: 0.25
} # Slow freight train
schedule_generator = sparse_schedule_generator(speed_ration_map)
observation_builder = GraphObsForRailEnv(
predictor=ShortestPathPredictorForRailEnv(
max_depth=args.prediction_depth))
env = RailEnv(
width=args.width,
height=args.height,
rail_generator=sparse_rail_generator(
max_num_cities=args.max_num_cities,
seed=
ep, # Use episode as seed when evaluation is performed during training
grid_mode=args.grid_mode,
max_rails_between_cities=args.max_rails_between_cities,
max_rails_in_city=args.max_rails_in_city,
),
schedule_generator=schedule_generator,
number_of_agents=args.num_agents,
obs_builder_object=observation_builder,
malfunction_generator_and_process_data=malfunction_from_params(
parameters={
'malfunction_rate': args.malfunction_rate,
'min_duration': args.min_duration,
'max_duration': args.max_duration
}),
)
if args.render:
env_renderer = RenderTool(env,
gl="PILSVG",
agent_render_variant=AgentRenderVariant.
AGENT_SHOWS_OPTIONS_AND_BOX,
show_debug=True,
screen_height=1080,
screen_width=1920)
#max_time_steps = env.compute_max_episode_steps(env.width, env.height)
max_time_steps = 200 # TODO Debug
# metrics['steps'].append(T)
metrics['episodes'].append(ep)
T_rewards = [] # List of episodes rewards
T_Qs = [] # List
T_num_done_agents = [] # List of number of done agents for each episode
T_all_done = [] # If all agents completed in each episode
network_action_dict = dict()
railenv_action_dict = dict()
qvalues = {}
# Test performance over several episodes
for ep in range(args.evaluation_episodes):
# Reset info
state, info = env.reset()
reward_sum, all_done = 0, False # reward_sum contains the cumulative reward obtained as sum during the steps
num_done_agents = 0
if args.render:
env_renderer.reset()
# Choose first action - decide entering of agents into the environment
for a in range(env.get_num_agents()):
action = np.random.choice((0, 2))
railenv_action_dict.update({a: action})
state, reward, done, info = env.step(railenv_action_dict) # Env step
reward_sum += sum(reward[a] for a in range(env.get_num_agents()))
if args.render:
env_renderer.render_env(show=True,
show_observations=False,
show_predictions=True)
for step in range(max_time_steps - 1):
# Choose actions
for a in range(env.get_num_agents()):
if info['action_required'][a]:
network_action = dqn.act(
state[a]
) # Choose an action greedily (with noisy weights)
# network_action = 0
railenv_action = observation_builder.choose_railenv_action(
a, network_action)
qvalues.update({a: dqn.get_q_values(state[a])})
else:
network_action = 0
railenv_action = 0
qvalues.update({a: [0, 0]}) # '0' if wasn't updated
railenv_action_dict.update({a: railenv_action})
network_action_dict.update({a: network_action})
if args.debug:
for a in range(env.get_num_agents()):
print('#########################################')
print('Info for agent {}'.format(a))
print('Occupancy, first layer: {}'.format(
state[a][:args.prediction_depth]))
print('Occupancy, second layer: {}'.format(
state[a][args.prediction_depth:args.prediction_depth *
2]))
print('Forks: {}'.format(
state[a][args.prediction_depth *
2:args.prediction_depth * 3]))
print('Target: {}'.format(
state[a][args.prediction_depth *
3:args.prediction_depth * 4]))
print('Priority: {}'.format(
state[a][args.prediction_depth * 4]))
print('Max priority encountered: {}'.format(
state[a][args.prediction_depth * 4 + 1]))
print('Num malfunctoning agents (globally): {}'.format(
state[a][args.prediction_depth * 4 + 2]))
print('Num agents ready to depart (globally): {}'.format(
state[a][args.prediction_depth * 4 + 3]))
print('Status: {}'.format(info['status'][a]))
print('Position: {}'.format(env.agents[a].position))
print('Moving? {} at speed: {}'.format(
env.agents[a].moving, info['speed'][a]))
print('Action required? {}'.format(
info['action_required'][a]))
print('Network action: {}'.format(network_action_dict[a]))
print('Railenv action: {}'.format(railenv_action_dict[a]))
print('Q values: {}'.format(qvalues[a]))
# print('QValues: {}'.format(qvalues))
print('Rewards: {}'.format(reward[a]))
# Breakpoint for debugging here
state, reward, done, info = env.step(
railenv_action_dict) # Env step
if args.render:
env_renderer.render_env(show=True,
show_observations=False,
show_predictions=True)
reward_sum += sum(reward[a] for a in range(env.get_num_agents()))
if done['__all__']:
all_done = True
break
# No need to close the renderer since env parameter sizes stay the same
T_rewards.append(reward_sum)
# Compute num of agents that reached their target
for a in range(env.get_num_agents()):
if done[a]:
num_done_agents += 1
T_num_done_agents.append(
num_done_agents / env.get_num_agents()) # In proportion to total
T_all_done.append(all_done)
# Test Q-values over validation memory
for state in val_mem: # Iterate over valid states
T_Qs.append(dqn.evaluate_q(state))
if args.debug:
print('T_Qs: {}'.format(T_Qs)) # These are Qs from a single agent TODO
avg_done_agents = sum(T_num_done_agents) / len(
T_num_done_agents
) # Average number of agents that reached their target
avg_reward = sum(T_rewards) / len(T_rewards)
avg_norm_reward = avg_reward / (max_time_steps / env.get_num_agents())
# avg_reward, avg_Q = sum(T_rewards) / len(T_rewards), sum(T_Qs) / len(T_Qs)
if not evaluate:
# Save model parameters if improved
if avg_done_agents > metrics['best_avg_done_agents']:
metrics['best_avg_done_agents'] = avg_done_agents
dqn.save(results_dir)
# Append to results and save metrics
metrics['rewards'].append(T_rewards)
metrics['Qs'].append(T_Qs)
torch.save(metrics, os.path.join(results_dir, 'metrics.pth'))
# Plot HTML
_plot_line(metrics['episodes'],
metrics['rewards'],
'Reward',
path=results_dir) # Plot rewards in episodes
_plot_line(metrics['episodes'], metrics['Qs'], 'Q', path=results_dir)
# Return average number of done agents (in proportion) and average reward
return avg_done_agents, avg_reward, avg_norm_reward
def train_agent(env_params, train_params):
# Environment parameters
n_agents = env_params.n_agents
x_dim = env_params.x_dim
y_dim = env_params.y_dim
n_cities = env_params.n_cities
max_rails_between_cities = env_params.max_rails_between_cities
max_rails_in_city = env_params.max_rails_in_city
seed = env_params.seed
# Observation parameters
observation_tree_depth = env_params.observation_tree_depth
observation_radius = env_params.observation_radius
observation_max_path_depth = env_params.observation_max_path_depth
# Training parameters
eps_start = train_params.eps_start
eps_end = train_params.eps_end
eps_decay = train_params.eps_decay
n_episodes = train_params.n_episodes
checkpoint_interval = train_params.checkpoint_interval
n_eval_episodes = train_params.n_evaluation_episodes
# Set the seeds
random.seed(seed)
np.random.seed(seed)
# Break agents from time to time
malfunction_parameters = MalfunctionParameters(
malfunction_rate=1. / 10000, # Rate of malfunctions
min_duration=15, # Minimal duration
max_duration=50 # Max duration
)
# Observation builder
predictor = ShortestPathPredictorForRailEnv(observation_max_path_depth)
tree_observation = TreeObsForRailEnv(max_depth=observation_tree_depth,
predictor=predictor)
# Fraction of train which each speed
speed_profiles = {
1.: 1.0, # Fast passenger train
1. / 2.: 0.0, # Fast freight train
1. / 3.: 0.0, # Slow commuter train
1. / 4.: 0.0 # Slow freight train
}
# Setup the environment
env = RailEnv(
width=x_dim,
height=y_dim,
rail_generator=sparse_rail_generator(
max_num_cities=n_cities,
grid_mode=False,
max_rails_between_cities=max_rails_between_cities,
max_rails_in_city=max_rails_in_city),
schedule_generator=sparse_schedule_generator(speed_profiles),
number_of_agents=n_agents,
malfunction_generator_and_process_data=malfunction_from_params(
malfunction_parameters),
obs_builder_object=tree_observation,
random_seed=seed)
env.reset(regenerate_schedule=True, regenerate_rail=True)
# Setup renderer
if train_params.render:
env_renderer = RenderTool(env, gl="PGL")
# Calculate the state size given the depth of the tree observation and the number of features
n_features_per_node = env.obs_builder.observation_dim
n_nodes = 0
for i in range(observation_tree_depth + 1):
n_nodes += np.power(4, i)
state_size = n_features_per_node * n_nodes
# The action space of flatland is 5 discrete actions
action_size = 5
# Max number of steps per episode
# This is the official formula used during evaluations
# See details in flatland.envs.schedule_generators.sparse_schedule_generator
max_steps = int(4 * 2 * (env.height + env.width + (n_agents / n_cities)))
action_count = [0] * action_size
action_dict = dict()
agent_obs = [None] * env.get_num_agents()
agent_prev_obs = [None] * env.get_num_agents()
agent_prev_action = [2] * env.get_num_agents()
update_values = False
smoothed_normalized_score = -1.0
smoothed_eval_normalized_score = -1.0
smoothed_completion = 0.0
smoothed_eval_completion = 0.0
# Double Dueling DQN policy
policy = DDDQNPolicy(state_size, action_size, train_params)
# TensorBoard writer
writer = SummaryWriter()
writer.add_hparams(vars(train_params), {})
writer.add_hparams(vars(env_params), {})
training_timer = Timer()
training_timer.start()
print(
"\n🚉 Training {} trains on {}x{} grid for {} episodes, evaluating on {} episodes every {} episodes.\n"
.format(env.get_num_agents(), x_dim, y_dim, n_episodes,
n_eval_episodes, checkpoint_interval))
for episode_idx in range(n_episodes + 1):
# Timers
step_timer = Timer()
reset_timer = Timer()
learn_timer = Timer()
preproc_timer = Timer()
# Reset environment
reset_timer.start()
obs, info = env.reset(regenerate_rail=True, regenerate_schedule=True)
reset_timer.end()
if train_params.render:
env_renderer.set_new_rail()
score = 0
nb_steps = 0
actions_taken = []
# Build agent specific observations
for agent in env.get_agent_handles():
if obs[agent]:
agent_obs[agent] = normalize_observation(
obs[agent],
observation_tree_depth,
observation_radius=observation_radius)
agent_prev_obs[agent] = agent_obs[agent].copy()
# Run episode
for step in range(max_steps - 1):
for agent in env.get_agent_handles():
if info['action_required'][agent]:
# If an action is required, we want to store the obs at that step as well as the action
update_values = True
action = policy.act(agent_obs[agent], eps=eps_start)
action_count[action] += 1
actions_taken.append(action)
else:
update_values = False
action = 0
action_dict.update({agent: action})
# Environment step
step_timer.start()
next_obs, all_rewards, done, info = env.step(action_dict)
step_timer.end()
if train_params.render and episode_idx % checkpoint_interval == 0:
env_renderer.render_env(show=True,
frames=False,
show_observations=False,
show_predictions=False)
for agent in range(env.get_num_agents()):
# Update replay buffer and train agent
# Only update the values when we are done or when an action was taken and thus relevant information is present
if update_values or done[agent]:
learn_timer.start()
policy.step(agent_prev_obs[agent],
agent_prev_action[agent], all_rewards[agent],
agent_obs[agent], done[agent])
learn_timer.end()
agent_prev_obs[agent] = agent_obs[agent].copy()
agent_prev_action[agent] = action_dict[agent]
# Preprocess the new observations
if next_obs[agent]:
preproc_timer.start()
agent_obs[agent] = normalize_observation(
next_obs[agent],
observation_tree_depth,
observation_radius=observation_radius)
preproc_timer.end()
score += all_rewards[agent]
nb_steps = step
if done['__all__']:
break
# Epsilon decay
eps_start = max(eps_end, eps_decay * eps_start)
# Collection information about training
tasks_finished = sum(done[idx] for idx in env.get_agent_handles())
completion = tasks_finished / max(1, env.get_num_agents())
normalized_score = score / (max_steps * env.get_num_agents())
action_probs = action_count / np.sum(action_count)
action_count = [1] * action_size
# Smoothed values for terminal display and for more stable hyper-parameter tuning
smoothing = 0.99
smoothed_normalized_score = smoothed_normalized_score * smoothing + normalized_score * (
1.0 - smoothing)
smoothed_completion = smoothed_completion * smoothing + completion * (
1.0 - smoothing)
# Print logs
if episode_idx % checkpoint_interval == 0:
torch.save(
policy.qnetwork_local,
'./checkpoints/origin_multi-' + str(episode_idx) + '.pth')
if train_params.render:
env_renderer.close_window()
print('\r🚂 Episode {}'
'\t 🏆 Score: {:.3f}'
' Avg: {:.3f}'
'\t 💯 Done: {:.2f}%'
' Avg: {:.2f}%'
'\t 🎲 Epsilon: {:.2f} '
'\t 🔀 Action Probs: {}'.format(episode_idx, normalized_score,
smoothed_normalized_score,
100 * completion,
100 * smoothed_completion,
eps_start,
format_action_prob(action_probs)),
end=" ")
# Evaluate policy
if episode_idx % train_params.checkpoint_interval == 0:
scores, completions, nb_steps_eval = eval_policy(
env, policy, n_eval_episodes, max_steps)
writer.add_scalar("evaluation/scores_min", np.min(scores),
episode_idx)
writer.add_scalar("evaluation/scores_max", np.max(scores),
episode_idx)
writer.add_scalar("evaluation/scores_mean", np.mean(scores),
episode_idx)
writer.add_scalar("evaluation/scores_std", np.std(scores),
episode_idx)
writer.add_histogram("evaluation/scores", np.array(scores),
episode_idx)
writer.add_scalar("evaluation/completions_min",
np.min(completions), episode_idx)
writer.add_scalar("evaluation/completions_max",
np.max(completions), episode_idx)
writer.add_scalar("evaluation/completions_mean",
np.mean(completions), episode_idx)
writer.add_scalar("evaluation/completions_std",
np.std(completions), episode_idx)
writer.add_histogram("evaluation/completions",
np.array(completions), episode_idx)
writer.add_scalar("evaluation/nb_steps_min", np.min(nb_steps_eval),
episode_idx)
writer.add_scalar("evaluation/nb_steps_max", np.max(nb_steps_eval),
episode_idx)
writer.add_scalar("evaluation/nb_steps_mean",
np.mean(nb_steps_eval), episode_idx)
writer.add_scalar("evaluation/nb_steps_std", np.std(nb_steps_eval),
episode_idx)
writer.add_histogram("evaluation/nb_steps",
np.array(nb_steps_eval), episode_idx)
smoothing = 0.9
smoothed_eval_normalized_score = smoothed_eval_normalized_score * smoothing + np.mean(
scores) * (1.0 - smoothing)
smoothed_eval_completion = smoothed_eval_completion * smoothing + np.mean(
completions) * (1.0 - smoothing)
writer.add_scalar("evaluation/smoothed_score",
smoothed_eval_normalized_score, episode_idx)
writer.add_scalar("evaluation/smoothed_completion",
smoothed_eval_completion, episode_idx)
# Save logs to tensorboard
writer.add_scalar("training/score", normalized_score, episode_idx)
writer.add_scalar("training/smoothed_score", smoothed_normalized_score,
episode_idx)
writer.add_scalar("training/completion", np.mean(completion),
episode_idx)
writer.add_scalar("training/smoothed_completion",
np.mean(smoothed_completion), episode_idx)
writer.add_scalar("training/nb_steps", nb_steps, episode_idx)
writer.add_histogram("actions/distribution", np.array(actions_taken),
episode_idx)
writer.add_scalar("actions/nothing",
action_probs[RailEnvActions.DO_NOTHING], episode_idx)
writer.add_scalar("actions/left",
action_probs[RailEnvActions.MOVE_LEFT], episode_idx)
writer.add_scalar("actions/forward",
action_probs[RailEnvActions.MOVE_FORWARD],
episode_idx)
writer.add_scalar("actions/right",
action_probs[RailEnvActions.MOVE_RIGHT], episode_idx)
writer.add_scalar("actions/stop",
action_probs[RailEnvActions.STOP_MOVING],
episode_idx)
writer.add_scalar("training/epsilon", eps_start, episode_idx)
writer.add_scalar("training/buffer_size", len(policy.memory),
episode_idx)
writer.add_scalar("training/loss", policy.loss, episode_idx)
writer.add_scalar("timer/reset", reset_timer.get(), episode_idx)
writer.add_scalar("timer/step", step_timer.get(), episode_idx)
writer.add_scalar("timer/learn", learn_timer.get(), episode_idx)
writer.add_scalar("timer/preproc", preproc_timer.get(), episode_idx)
writer.add_scalar("timer/total", training_timer.get_current(),
episode_idx)
def test_initial_malfunction_do_nothing():
stochastic_data = MalfunctionParameters(malfunction_rate=70, # Rate of malfunction occurence
min_duration=2, # Minimal duration of malfunction
max_duration=5 # Max duration of malfunction
)
rail, rail_map = make_simple_rail2()
env = RailEnv(width=25,
height=30,
rail_generator=rail_from_grid_transition_map(rail),
schedule_generator=random_schedule_generator(),
number_of_agents=1,
malfunction_generator_and_process_data=malfunction_from_params(stochastic_data),
# Malfunction data generator
)
env.reset()
set_penalties_for_replay(env)
replay_config = ReplayConfig(
replay=[
Replay(
position=None,
direction=Grid4TransitionsEnum.EAST,
action=RailEnvActions.MOVE_FORWARD,
set_malfunction=3,
malfunction=3,
reward=env.step_penalty, # full step penalty while malfunctioning
status=RailAgentStatus.READY_TO_DEPART
),
Replay(
position=(3, 2),
direction=Grid4TransitionsEnum.EAST,
action=RailEnvActions.DO_NOTHING,
malfunction=2,
reward=env.step_penalty, # full step penalty while malfunctioning
status=RailAgentStatus.ACTIVE
),
# malfunction stops in the next step and we're still at the beginning of the cell
# --> if we take action DO_NOTHING, agent should restart without moving
#
Replay(
position=(3, 2),
direction=Grid4TransitionsEnum.EAST,
action=RailEnvActions.DO_NOTHING,
malfunction=1,
reward=env.step_penalty, # full step penalty while stopped
status=RailAgentStatus.ACTIVE
),
# we haven't started moving yet --> stay here
Replay(
position=(3, 2),
direction=Grid4TransitionsEnum.EAST,
action=RailEnvActions.DO_NOTHING,
malfunction=0,
reward=env.step_penalty, # full step penalty while stopped
status=RailAgentStatus.ACTIVE
),
Replay(
position=(3, 2),
direction=Grid4TransitionsEnum.EAST,
action=RailEnvActions.MOVE_FORWARD,
malfunction=0,
reward=env.start_penalty + env.step_penalty * 1.0, # start penalty + step penalty for speed 1.0
status=RailAgentStatus.ACTIVE
), # we start to move forward --> should go to next cell now
Replay(
position=(3, 3),
direction=Grid4TransitionsEnum.EAST,
action=RailEnvActions.MOVE_FORWARD,
malfunction=0,
reward=env.step_penalty * 1.0, # step penalty for speed 1.0
status=RailAgentStatus.ACTIVE
)
],
speed=env.agents[0].speed_data['speed'],
target=env.agents[0].target,
initial_position=(3, 2),
initial_direction=Grid4TransitionsEnum.EAST,
)
run_replay_config(env, [replay_config], activate_agents=False)
def train(env):
n_agents = env["n_agents"]
x_dim = env["x_dim"]
y_dim = env["y_dim"]
n_cities = env["n_cities"]
max_rails_between_cities = env["max_rails_between_cities"]
max_rails_in_city = env["max_rails_in_city"]
seed = 0
use_fast_tree_obs = False
# Observation parameters
observation_tree_depth = 4
observation_radius = 10
observation_max_path_depth = 30
# Set the seeds
random.seed(seed)
np.random.seed(seed)
# Break agents from time to time
malfunction_parameters = MalfunctionParameters(
malfunction_rate=1. / 10000, # Rate of malfunctions
min_duration=15, # Minimal duration
max_duration=50 # Max duration
)
# Observation builder
predictor = ShortestPathPredictorForRailEnv(observation_max_path_depth)
tree_observation = None
if use_fast_tree_obs:
tree_observation = FastTreeObs(max_depth=observation_tree_depth)
print("Using FastTreeObs")
else:
tree_observation = TreeObsForRailEnv(max_depth=observation_tree_depth,
predictor=predictor)
print("Using StandardTreeObs")
speed_profiles = {
1.: 1.0, # Fast passenger train
1. / 2.: 0.0, # Fast freight train
1. / 3.: 0.0, # Slow commuter train
1. / 4.: 0.0 # Slow freight train
}
env = RailEnv(
width=x_dim,
height=y_dim,
rail_generator=sparse_rail_generator(
max_num_cities=n_cities,
grid_mode=False,
max_rails_between_cities=max_rails_between_cities,
max_rails_in_city=max_rails_in_city),
schedule_generator=sparse_schedule_generator(speed_profiles),
number_of_agents=n_agents,
malfunction_generator_and_process_data=malfunction_from_params(
malfunction_parameters),
obs_builder_object=tree_observation,
random_seed=seed)
rewards = []
obs, info = env.reset()
if use_fast_tree_obs:
state_size = tree_observation.observation_dim
else:
# Calculate the state size given the depth of the tree observation and the
# number of features
n_features_per_node = env.obs_builder.observation_dim
n_nodes = 0
for i in range(observation_tree_depth + 1):
n_nodes += np.power(4, i)
state_size = n_features_per_node * n_nodes
action_size = 5
DEVICE = 'cpu'
# if torch.cuda.is_available():
# DEVICE = 'gpu'
buffer_length = 10000
steps_to_save_model = 10
step_size = 100
num_steps = 100 # update every 100 steps
avg_steps = 20 # num steps to average and plot rewards
reward_q = []
batch_size = 100
agent_obs = np.array([None] * env.get_num_agents())
max_steps = int(4 * 2 * (env.height + env.width + (n_agents / n_cities)))
num_episodes = 100000
agent_init_params = []
sa_size = []
for i in range(n_agents):
agent_init_params.append({
'num_in_pol': state_size,
'num_out_pol': action_size,
'init_weights': 'model.pt'
})
sa_size.append((state_size, action_size))
hyperparams = {
"tau": 0.01,
"pi_lr": 0.00001,
"q_lr": 0.00005,
"pol_hidden_dim": 256,
"critic_hidden_dim": 256,
"attend_heads": 8
}
model = AttentionSAC(agent_init_params=agent_init_params,
sa_size=sa_size,
tau=hyperparams["tau"],
pi_lr=hyperparams["pi_lr"],
q_lr=hyperparams["q_lr"],
pol_hidden_dim=hyperparams["pol_hidden_dim"],
critic_hidden_dim=hyperparams["critic_hidden_dim"],
attend_heads=hyperparams["attend_heads"])
model.init_dict = {}
replay_buffer = ReplayBuffer(buffer_length, n_agents,
[state_size for i in range(n_agents)],
[action_size for i in range(n_agents)])
print("MAX STEPS: " + str(max_steps))
print("NUM EPISODES: ", num_episodes)
print("HYPERPARAMS: ")
print(hyperparams)
start_time = time.time()
for ep in range(num_episodes):
print("Episode " + str(ep) + ":", flush=True)
obs, info = env.reset(True, True)
model.prep_rollouts(device=DEVICE)
reward_sum_for_this_episode = 0
for steps in range(max_steps):
if steps % step_size == 0:
print("=", end="", flush=True)
for agent in env.get_agent_handles():
if obs[agent] is not None:
if use_fast_tree_obs:
agent_obs[agent] = obs[agent]
else:
agent_obs[agent] = normalize_observation(
obs[agent],
observation_tree_depth,
observation_radius=observation_radius)
else:
agent_obs[agent] = np.array([0.] * state_size)
action_dict = {}
agent_actions = []
torch_obs = [
Variable(torch.Tensor([agent_obs[i]]), requires_grad=False)
for i in range(n_agents)
]
torch_agent_actions = model.step(torch_obs, explore=True)
agent_actions = [ac.data.numpy() for ac in torch_agent_actions]
for i in range(n_agents):
dist = torch_agent_actions[i][0]
idx = -1
for j in range(action_size):
if dist[j] != 0:
idx = j
break
action_dict[i] = idx
next_obs, all_rewards, done, info = env.step(action_dict)
rewards = []
dones = []
next_agent_obs = np.array([None] * env.get_num_agents())
for agent in env.get_agent_handles():
if next_obs[agent] is not None:
if use_fast_tree_obs:
next_agent_obs[agent] = next_obs[agent]
else:
next_agent_obs[agent] = normalize_observation(
obs[agent],
observation_tree_depth,
observation_radius=observation_radius)
else:
next_agent_obs[agent] = np.array([0.] * state_size)
for i in range(n_agents):
reward_sum_for_this_episode += all_rewards[i]
rewards.append(all_rewards[i])
all_rewards[i] += augment_reward(agent_obs[agent])
dones.append(done[i])
replay_buffer.push(np.array([agent_obs]), np.array(agent_actions),
np.array([rewards]), np.array([next_agent_obs]),
np.array([dones]))
if steps % num_steps == 0:
model.prep_training(device=DEVICE)
sample = replay_buffer.sample(batch_size, norm_rews=False)
#print(sample)
model.update_critic(sample)
model.update_policies(sample)
model.update_all_targets()
model.prep_rollouts(device=DEVICE)
reward_sum_for_this_episode /= n_agents
reward_q.append(reward_sum_for_this_episode)
if len(reward_q) == avg_steps:
wandb.log({'reward': np.mean(reward_q)})
reward_q = []
print()
if ep % steps_to_save_model == 0:
print("\nSaving model")
model.save(os.getcwd() + "/model.pt")
cur_time = time.time()
time_elapsed = (cur_time - start_time) // 60
print("Time Elapsed: " + str(time_elapsed) + "\n")
def main(argv):
try:
opts, args = getopt.getopt(argv, "n:", ["n_trials="])
except getopt.GetoptError:
print('training_navigation.py -n <n_trials>')
sys.exit(2)
for opt, arg in opts:
if opt in ('-n', '--n_trials'):
n_trials = int(arg)
random.seed(1)
np.random.seed(1)
#### Choose the desired setup ####
multi_agent_setup = 1
malfunctions_enabled = False
agents_one_speed = True
##################################
# Single agent (1)
if multi_agent_setup == 1:
x_dim = 35
y_dim = 35
n_agents = 1
max_num_cities = 3
max_rails_between_cities = 2
max_rails_in_city = 3
# Multi agent (3)
if multi_agent_setup == 3:
x_dim = 40
y_dim = 40
n_agents = 3
max_num_cities = 4
max_rails_between_cities = 2
max_rails_in_city = 3
# Multi agent (5)
if multi_agent_setup == 5:
x_dim = 16 * 3
y_dim = 9 * 3
n_agents = 5
max_num_cities = 5
max_rails_between_cities = 2
max_rails_in_city = 3
# Multi agent (10)
if multi_agent_setup == 10:
x_dim = 16 * 4
y_dim = 9 * 4
n_agents = 10
max_num_cities = 9
max_rails_between_cities = 5
max_rails_in_city = 5
# Use a the malfunction generator to break agents from time to time
stochastic_data = {
'malfunction_rate':
80, # Rate of malfunction occurence of single agent
'min_duration': 15, # Minimal duration of malfunction
'max_duration': 50 # Max duration of malfunction
}
# Custom observation builder
tree_depth = 2
TreeObservation = TreeObsForRailEnv(
max_depth=tree_depth, predictor=ShortestPathPredictorForRailEnv(20))
np.savetxt(fname=path.join('Nets', 'info.txt'),
X=[
x_dim, y_dim, n_agents, max_num_cities,
max_rails_between_cities, max_rails_in_city, tree_depth
],
delimiter=';')
# Different agent types (trains) with different speeds.
if agents_one_speed:
speed_ration_map = {
1.: 1., # Fast passenger train
1. / 2.: 0.0, # Fast freight train
1. / 3.: 0.0, # Slow commuter train
1. / 4.: 0.0
} # Slow freight train
else:
speed_ration_map = {
1.: 0.25, # Fast passenger train
1. / 2.: 0.25, # Fast freight train
1. / 3.: 0.25, # Slow commuter train
1. / 4.: 0.25
} # Slow freight train
if malfunctions_enabled:
env = RailEnv(
width=x_dim,
height=y_dim,
rail_generator=sparse_rail_generator(
max_num_cities=max_num_cities,
# Number of cities in map (where train stations are)
seed=14, # Random seed
grid_mode=False,
max_rails_between_cities=max_rails_between_cities,
max_rails_in_city=max_rails_in_city),
schedule_generator=sparse_schedule_generator(speed_ration_map),
malfunction_generator_and_process_data=malfunction_from_params(
stochastic_data),
number_of_agents=n_agents,
obs_builder_object=TreeObservation)
else:
env = RailEnv(
width=x_dim,
height=y_dim,
rail_generator=sparse_rail_generator(
max_num_cities=max_num_cities,
# Number of cities in map (where train stations are)
seed=14, # Random seed
grid_mode=False,
max_rails_between_cities=max_rails_between_cities,
max_rails_in_city=max_rails_in_city),
schedule_generator=sparse_schedule_generator(speed_ration_map),
number_of_agents=n_agents,
obs_builder_object=TreeObservation)
env.reset(True, True)
# After training we want to render the results so we also load a renderer
env_renderer = RenderTool(
env,
gl="PILSVG",
screen_height=800, # Adjust these parameters to fit your resolution
screen_width=900)
# Given the depth of the tree observation and the number of features per node we get the following state_size
num_features_per_node = env.obs_builder.observation_dim
nr_nodes = 0
for i in range(tree_depth + 1):
nr_nodes += np.power(4, i)
state_size = num_features_per_node * nr_nodes
# The action space of flatland is 5 discrete actions
action_size = 5
# We set the number of episodes we would like to train on
if 'n_trials' not in locals():
n_trials = 15000
# And the max number of steps we want to take per episode
max_steps = int(3 * (env.height + env.width))
# Define training parameters
eps = 1.
eps_end = 0.005
eps_decay = 0.998
# And some variables to keep track of the progress
action_dict = dict()
final_action_dict = dict()
scores_window = deque(maxlen=100)
done_window = deque(maxlen=100)
deadlock_window = deque(maxlen=100)
deadlock_average = []
scores = []
dones_list = []
#Metrics
eps_list = []
action_prob_list = []
action_prob = [0] * action_size
agent_obs = [None] * env.get_num_agents()
agent_next_obs = [None] * env.get_num_agents()
agent_obs_buffer = [None] * env.get_num_agents()
agent_action_buffer = [2] * env.get_num_agents()
cummulated_reward = np.zeros(env.get_num_agents())
update_values = False
# Now we load a Double dueling DQN agent
agent = Agent(state_size, action_size)
for trials in range(1, n_trials + 1):
#print(torch.cuda.current_device())
# Reset environment
obs, info = env.reset(True, True)
#env_renderer.reset()
# Build agent specific observations
for a in range(env.get_num_agents()):
if obs[a]:
agent_obs[a] = normalize_observation(obs[a],
tree_depth,
observation_radius=10)
agent_obs_buffer[a] = agent_obs[a].copy()
# Reset score and done
score = 0
env_done = 0
# Run episode
for step in range(max_steps):
# Action
for a in range(env.get_num_agents()):
if info['action_required'][a]:
# If an action is require, we want to store the obs a that step as well as the action
update_values = True
action = agent.act(agent_obs[a], eps=eps)
action_prob[action] += 1
else:
update_values = False
action = 0
action_dict.update({a: action})
# Environment step
next_obs, all_rewards, done, deadlocks, info = env.step(
action_dict)
#env_renderer.render_env(show=True, show_predictions=True, show_observations=True)
# Update replay buffer and train agent
for a in range(env.get_num_agents()):
# Only update the values when we are done or when an action was taken and thus relevant information is present
if update_values or done[a]:
agent.step(agent_obs_buffer[a], agent_action_buffer[a],
all_rewards[a], agent_obs[a], done[a])
cummulated_reward[a] = 0.
agent_obs_buffer[a] = agent_obs[a].copy()
agent_action_buffer[a] = action_dict[a]
if next_obs[a]:
agent_obs[a] = normalize_observation(next_obs[a],
tree_depth,
observation_radius=10)
score += all_rewards[a] / env.get_num_agents()
# Copy observation
if done['__all__']:
env_done = 1
break
# Epsilon decay
eps = max(eps_end, eps_decay * eps) # decrease epsilon
# Collection information about training
tasks_finished = 0
for _idx in range(env.get_num_agents()):
if done[_idx] == 1:
tasks_finished += 1
done_window.append(tasks_finished / max(1, env.get_num_agents()))
scores_window.append(score / max_steps) # save most recent score
scores.append(np.mean(scores_window))
deadlock_window.append(
deadlocks.count(1) / max(1, env.get_num_agents()))
deadlock_average.append(np.mean(deadlock_window))
dones_list.append((np.mean(done_window)))
eps_list.append(eps)
action_prob_list.append(action_prob / np.sum(action_prob))
print(
'\rTraining {} Agents on ({},{}).\t Episode {}\t Average Score: {:.3f}\tDones: {:.2f} %\tDeadlocks: {:.2f} \tEpsilon: {:.2f} \t Action Probabilities: \t {}'
.format(env.get_num_agents(), x_dim, y_dim, trials,
np.mean(scores_window), 100 * np.mean(done_window),
np.mean(deadlock_window), eps,
action_prob / np.sum(action_prob)),
end=" ")
if trials % 100 == 0:
print(
'\rTraining {} Agents on ({},{}).\t Episode {}\t Average Score: {:.3f}\tDones: {:.2f}%\tEpsilon: {:.2f} \t Action Probabilities: \t {}'
.format(env.get_num_agents(), x_dim, y_dim, trials,
np.mean(scores_window), 100 * np.mean(done_window),
eps, action_prob / np.sum(action_prob)))
torch.save(
agent.qnetwork_local.state_dict(),
path.join('Nets',
('navigator_checkpoint' + str(trials) + '.pth')))
action_prob = [1] * action_size
if trials % 50 == 0:
np.savetxt(fname=path.join('Nets', 'metrics.csv'),
X=np.transpose(
np.asarray([
scores, dones_list, deadlock_average, eps_list
])),
delimiter=';',
newline='\n')
np.savetxt(fname=path.join('Nets', 'action_prob.csv'),
X=np.asarray(action_prob_list),
delimiter=';',
newline='\n')
# Plot overall training progress at the end
plt.plot(scores)
plt.show()
def main(args, dir):
'''
:param args:
:return:
Episodes to debug (set breakpoint in episodes loop to debug):
- ep = 3, agent 1 spawns in front of 3, blocking its path; 0 and 2 are in a deadlock since they have same priority
- ep = 4, agents stop because of wrong priorities even though the conflict zone wasn't entered,
- ep = 14,
'''
rail_generator = sparse_rail_generator(
max_num_cities=args.max_num_cities,
seed=args.seed,
grid_mode=args.grid_mode,
max_rails_between_cities=args.max_rails_between_cities,
max_rails_in_city=args.max_rails_in_city,
)
# Maps speeds to % of appearance in the env
speed_ration_map = {
1.: 0.25, # Fast passenger train
1. / 2.: 0.25, # Fast freight train
1. / 3.: 0.25, # Slow commuter train
1. / 4.: 0.25
} # Slow freight train
observation_builder = GraphObsForRailEnv(
predictor=ShortestPathPredictorForRailEnv(
max_depth=args.prediction_depth),
bfs_depth=4)
env = RailEnv(
width=args.width,
height=args.height,
rail_generator=rail_generator,
schedule_generator=sparse_schedule_generator(speed_ration_map),
number_of_agents=args.num_agents,
obs_builder_object=observation_builder,
malfunction_generator_and_process_data=malfunction_from_params(
parameters={
'malfunction_rate':
args.malfunction_rate, # Rate of malfunction occurrence
'min_duration':
args.min_duration, # Minimal duration of malfunction
'max_duration':
args.max_duration # Max duration of malfunction
}))
if args.render:
env_renderer = RenderTool(env,
agent_render_variant=AgentRenderVariant.
AGENT_SHOWS_OPTIONS_AND_BOX,
show_debug=True)
sm = stateMachine()
tb = TestBattery(env, observation_builder)
state_machine_action_dict = {}
railenv_action_dict = {}
# max_time_steps = env.compute_max_episode_steps(args.width, args.height)
max_time_steps = 200
T_rewards = [] # List of episodes rewards
T_Qs = [] # List of q values
T_num_done_agents = [] # List of number of done agents for each episode
T_all_done = [] # If all agents completed in each episode
T_episodes = [] # Time taken for each episode
if args.save_image and not os.path.isdir("image_dump"):
os.makedirs("image_dump")
step_taken = 0
total_step_taken = 0
total_episodes = 0
step_times = [] # Time taken for each step
for ep in range(args.num_episodes):
# Reset info at the beginning of an episode
start_time = time.time() # Take time of one episode
if args.generate_baseline:
if not os.path.isdir("image_dump/" + str(dir)) and args.save_image:
os.makedirs("image_dump/" + str(dir))
else:
if not os.path.isdir("image_dump/" + str(ep)) and args.save_image:
os.makedirs("image_dump/" + str(ep))
state, info = env.reset()
tb.reset()
if args.render:
env_renderer.reset()
reward_sum, all_done = 0, False # reward_sum contains the cumulative reward obtained as sum during the steps
num_done_agents = 0
state_machine_action = {}
for i in range(env.number_of_agents):
state_machine_action[i] = 0
for step in range(max_time_steps):
start_step_time = time.time()
#if step % 10 == 0:
# print(step)
# Test battery
# see test_battery.py
triggers = tb.tests(state, args.prediction_depth,
state_machine_action)
# state machine based on triggers of test battery
# see state_machine.py
state_machine_action = sm.act(
triggers) # State machine picks action
for a in range(env.get_num_agents()):
#if info['action_required'][a]:
# #railenv_action = observation_builder.choose_railenv_action(a, state_machine_action[a])
# railenv_action = observation_builder.choose_railenv_action(a, state_machine_action[a])
# state_machine_action_dict.update({a: state_machine_action})
# railenv_action_dict.update({a: railenv_action})
# railenv_action = observation_builder.choose_railenv_action(a, state_machine_action[a])
railenv_action = observation_builder.choose_railenv_action(
a, state_machine_action[a])
state_machine_action_dict.update({a: state_machine_action})
railenv_action_dict.update({a: railenv_action})
state, reward, done, info = env.step(
railenv_action_dict) # Env step
if args.generate_baseline:
#env_renderer.render_env(show=True, show_observations=False, show_predictions=True)
env_renderer.render_env(show=False,
show_observations=False,
show_predictions=True)
else:
env_renderer.render_env(show=True,
show_observations=False,
show_predictions=True)
if args.generate_baseline:
if args.save_image:
env_renderer.save_image("image_dump/" + str(dir) +
"/image_" + str(step) + "_.png")
else:
if args.save_image:
env_renderer.save_image("image_dump/" + str(ep) +
"/image_" + str(step) + "_.png")
if args.debug:
for a in range(env.get_num_agents()):
log('\n\n#########################################')
log('\nInfo for agent {}'.format(a))
#log('\npath : {}'.format(state[a]["path"]))
log('\noverlap : {}'.format(state[a]["overlap"]))
log('\ndirection : {}'.format(state[a]["direction"]))
log('\nOccupancy, first layer: {}'.format(
state[a]["occupancy"]))
log('\nOccupancy, second layer: {}'.format(
state[a]["conflict"]))
log('\nForks: {}'.format(state[a]["forks"]))
log('\nTarget: {}'.format(state[a]["target"]))
log('\nPriority: {}'.format(state[a]["priority"]))
log('\nMax priority encountered: {}'.format(
state[a]["max_priority"]))
log('\nNum malfunctioning agents (globally): {}'.format(
state[a]["n_malfunction"]))
log('\nNum agents ready to depart (globally): {}'.format(
state[a]["ready_to_depart"]))
log('\nStatus: {}'.format(info['status'][a]))
log('\nPosition: {}'.format(env.agents[a].position))
log('\nTarget: {}'.format(env.agents[a].target))
log('\nMoving? {} at speed: {}'.format(
env.agents[a].moving, info['speed'][a]))
log('\nAction required? {}'.format(
info['action_required'][a]))
log('\nState machine action: {}'.format(
state_machine_action_dict[a]))
log('\nRailenv action: {}'.format(railenv_action_dict[a]))
log('\nRewards: {}'.format(reward[a]))
log('\n\n#########################################')
reward_sum += sum(reward[a] for a in range(env.get_num_agents()))
step_taken = step
time_taken_step = time.time() - start_step_time
step_times.append(time_taken_step)
if done['__all__']:
all_done = True
break
total_step_taken += step_taken
time_taken = time.time() - start_time # Time taken for one episode
total_episodes = ep
# Time metrics - too precise
avg_time_step = sum(step_times) / step_taken
#print("Avg time step: " + str(avg_time_step))
# No need to close the renderer since env parameter sizes stay the same
T_rewards.append(reward_sum)
# Compute num of agents that reached their target
for a in range(env.get_num_agents()):
if done[a]:
num_done_agents += 1
percentage_done_agents = num_done_agents / env.get_num_agents()
log("\nDone agents in episode: {}".format(percentage_done_agents))
T_num_done_agents.append(
percentage_done_agents) # In proportion to total
T_all_done.append(all_done)
# Average number of agents that reached their target
avg_done_agents = sum(T_num_done_agents) / len(T_num_done_agents) if len(
T_num_done_agents) > 0 else 0
avg_reward = sum(T_rewards) / len(T_rewards) if len(T_rewards) > 0 else 0
avg_norm_reward = avg_reward / (max_time_steps / env.get_num_agents())
avg_ep_time = sum(T_episodes) / args.num_episodes
if total_episodes == 0:
total_episodes = 1
log("\nSeed: " + str(args.seed) \
+ "\t | Avg_done_agents: " + str(avg_done_agents)\
+ "\t | Avg_reward: " + str(avg_reward)\
+ "\t | Avg_norm_reward: " + str(avg_norm_reward)\
+ "\t | Max_num_time_steps: " + str(max_time_steps)\
+ "\t | Avg_num_time_steps: " + str(total_step_taken/total_episodes)
+ "\t | Avg episode time: " + str(avg_ep_time))
def eval_policy(env_params, checkpoint, n_eval_episodes, max_steps, seed,
render):
# evaluation is faster on CPU, except if you have huge networks
parameters = {'use_gpu': False}
policy = DDDQNPolicy(state_size,
action_size,
Namespace(**parameters),
evaluation_mode=True)
policy.qnetwork_local = torch.load(checkpoint)
env_params = Namespace(**env_params)
# Environment parameters
n_agents = env_params.n_agents
x_dim = env_params.x_dim
y_dim = env_params.y_dim
n_cities = env_params.n_cities
max_rails_between_cities = env_params.max_rails_between_cities
max_rails_in_city = env_params.max_rails_in_city
# Observation parameters
observation_tree_depth = env_params.observation_tree_depth
observation_radius = env_params.observation_radius
observation_max_path_depth = env_params.observation_max_path_depth
# Malfunction and speed profiles
# TODO pass these parameters properly from main!
malfunction_parameters = MalfunctionParameters(
malfunction_rate=1. / 2000, # Rate of malfunctions
min_duration=20, # Minimal duration
max_duration=50 # Max duration
)
speed_profiles = {
1.: 1.0, # Fast passenger train
1. / 2.: 0.0, # Fast freight train
1. / 3.: 0.0, # Slow commuter train
1. / 4.: 0.0 # Slow freight train
}
# Observation builder
predictor = ShortestPathPredictorForRailEnv(observation_max_path_depth)
tree_observation = TreeObsForRailEnv(max_depth=observation_tree_depth,
predictor=predictor)
# Setup the environment
env = RailEnv(
width=x_dim,
height=y_dim,
rail_generator=sparse_rail_generator(
max_num_cities=n_cities,
grid_mode=False,
max_rails_between_cities=max_rails_between_cities,
max_rails_in_city=max_rails_in_city),
schedule_generator=sparse_schedule_generator(speed_profiles),
number_of_agents=n_agents,
malfunction_generator_and_process_data=malfunction_from_params(
malfunction_parameters),
obs_builder_object=tree_observation,
random_seed=seed)
env.reset(True, True)
if render:
env_renderer = RenderTool(env, gl="PGL")
action_dict = dict()
scores = []
completions = []
nb_steps = []
inference_times = []
preproc_times = []
agent_times = []
step_times = []
for episode_idx in range(n_eval_episodes):
inference_timer = Timer()
preproc_timer = Timer()
agent_timer = Timer()
step_timer = Timer()
agent_obs = [None] * env.get_num_agents()
score = 0.0
step_timer.start()
obs, info = env.reset(regenerate_rail=True, regenerate_schedule=True)
step_timer.end()
if render:
env_renderer.set_new_rail()
final_step = 0
for step in range(max_steps - 1):
agent_timer.start()
for agent in env.get_agent_handles():
if obs[agent]:
preproc_timer.start()
agent_obs[agent] = normalize_observation(
obs[agent],
tree_depth=observation_tree_depth,
observation_radius=observation_radius)
preproc_timer.end()
action = 0
if info['action_required'][agent]:
inference_timer.start()
action = policy.act(agent_obs[agent], eps=0.0)
inference_timer.end()
action_dict.update({agent: action})
agent_timer.end()
step_timer.start()
obs, all_rewards, done, info = env.step(action_dict)
step_timer.end()
if render:
env_renderer.render_env(show=True,
frames=False,
show_observations=False,
show_predictions=False)
for agent in env.get_agent_handles():
score += all_rewards[agent]
final_step = step
if done['__all__']:
break
normalized_score = score / (max_steps * env.get_num_agents())
scores.append(normalized_score)
tasks_finished = sum(done[idx] for idx in env.get_agent_handles())
completion = tasks_finished / max(1, env.get_num_agents())
completions.append(completion)
nb_steps.append(final_step)
inference_times.append(inference_timer.get())
preproc_times.append(preproc_timer.get())
agent_times.append(agent_timer.get())
step_times.append(step_timer.get())
print(
"☑️ Score: {:.3f} \tDone: {:.1f}% \tNb steps: {:.3f} "
"\t🚉 Env: {:.3f}s "
"\t🤖 Agent: {:.3f}s (per step: {:.3f}s) \t[preproc: {:.3f}s \tinfer: {:.3f}s]"
.format(normalized_score, completion * 100.0, final_step,
step_timer.get(), agent_timer.get(),
agent_timer.get() / final_step, preproc_timer.get(),
inference_timer.get()))
return scores, completions, nb_steps, agent_times, step_times
1. / 2.: 0.0, # Fast freight train
1. / 3.: 0.0, # Slow commuter train
1. / 4.: 0.0 # Slow freight train
}
# Setup the environment
env = RailEnv(width=x_dim,
height=y_dim,
rail_generator=sparse_rail_generator(
max_num_cities=n_cities,
grid_mode=False,
max_rails_between_cities=max_rails_between_cities,
max_rails_in_city=max_rails_in_city),
schedule_generator=sparse_schedule_generator(speed_profiles),
number_of_agents=n_agents,
malfunction_generator_and_process_data=malfunction_from_params(
malfunction_parameters),
obs_builder_object=tree_observation,
random_seed=seed)
env.reset(regenerate_schedule=True, regenerate_rail=True)
# Setup renderer
env_renderer = RenderTool(env)
'''
env_renderer.render_env(show=True,show_predictions=False)
time.sleep(5)
env_renderer.close_window()
'''
n_features_per_node = env.obs_builder.observation_dim
n_nodes = 0
def main():
np.random.seed(1)
env = RailEnv(
width=x_dim,
height=y_dim,
number_of_agents=n_agents,
rail_generator=rail_generator,
schedule_generator=schedule_generator,
malfunction_generator_and_process_data=malfunction_from_params(
StochasticData(1 / 8000, 15, 50)),
obs_builder_object=TreeObservation(max_depth=tree_depth))
# After training we want to render the results so we also load a renderer
env_renderer = RenderTool(env, gl="PILSVG")
# Calculate the state size based on the number of nodes in the tree observation
num_features_per_node = env.obs_builder.observation_dim
num_nodes = sum(np.power(4, i) for i in range(tree_depth + 1))
state_size = num_features_per_node * num_nodes
action_size = 5
# Now we load a double dueling DQN agent and initialize it from the checkpoint
agent = Agent(state_size, action_size)
if load_from_checkpoint:
start, eps = agent.load(project_root / 'checkpoints', 0, 1.0)
else:
start, eps = 0, 1.0
# And some variables to keep track of the progress
action_dict, final_action_dict = {}, {}
scores_window, done_window = deque(maxlen=500), deque(maxlen=500)
action_prob = [0] * action_size
agent_obs = [None] * n_agents
agent_obs_buffer = [None] * n_agents
agent_action_buffer = [2] * n_agents
max_steps = int(3 * (x_dim + y_dim))
update_values = False
start_time = time.time()
# We don't want to retrain on old railway networks when we restart from a checkpoint, so we just loop
# through the generators to get all the old networks out of the way
for _ in range(0, start):
rail_generator()
schedule_generator()
# Start the training loop
for episode in range(start + 1, n_trials + 1):
env_renderer.reset()
obs, info = env.reset(True, True)
score = 0
# Build agent specific observations
for a in range(n_agents):
if obs[a]:
agent_obs[a] = normalize_observation(obs[a],
tree_depth,
observation_radius=10)
agent_obs_buffer[a] = agent_obs[a].copy()
# Run episode
for step in range(max_steps):
for a in range(n_agents):
if info['action_required'][a]:
# If an action is required, we want to store the obs a that step as well as the action
update_values = True
action = agent.act(agent_obs[a], eps=eps)
# action = np.random.randint(4)
action_dict[a] = action
action_prob[action] += 1
else:
update_values = False
action_dict[a] = 0
# Environment step
next_obs, all_rewards, done, info = env.step(action_dict)
# Update replay buffer and train agent
for a in range(n_agents):
# Only update the values when we are done or when an action was taken and thus relevant information is present
if update_values or done[a]:
agent.step(agent_obs_buffer[a], agent_action_buffer[a],
all_rewards[a], agent_obs[a], done[a], train)
agent_obs_buffer[a] = agent_obs[a].copy()
agent_action_buffer[a] = action_dict[a]
if next_obs[a]:
agent_obs[a] = normalize_observation(next_obs[a],
tree_depth,
observation_radius=10)
score += all_rewards[a] / n_agents
# Render
if episode % render_interval == 0: render(env_renderer)
if done['__all__']: break
# Epsilon decay
eps = max(eps_end, eps_decay * eps) # decrease epsilon
# Collection information about training
tasks_finished = sum(done[i] for i in range(n_agents))
done_window.append(tasks_finished / max(1, n_agents))
scores_window.append(score / max_steps) # save most recent score
action_probs = ', '.join(f'{x:.3f}'
for x in action_prob / np.sum(action_prob))
print(f'\rTraining {n_agents} Agents on ({x_dim},{y_dim}) \t ' +
f'Episode {episode} \t ' +
f'Average Score: {np.mean(scores_window):.3f} \t ' +
f'Dones: {100 * np.mean(done_window):.2f}% \t ' +
f'Epsilon: {eps:.2f} \t ' +
f'Action Probabilities: {action_probs}',
end=" ")
if episode % report_interval == 0:
print(f'\rTraining {n_agents} Agents on ({x_dim},{y_dim}) \t ' +
f'Episode {episode} \t ' +
f'Average Score: {np.mean(scores_window):.3f} \t ' +
f'Dones: {100 * np.mean(done_window):.2f}% \t ' +
f'Epsilon: {eps:.2f} \t ' +
f'Action Probabilities: {action_probs} \t ' +
f'Time taken: {time.time() - start_time:.2f}s')
if train: agent.save(project_root / 'checkpoints', episode, eps)
start_time = time.time()
action_prob = [1] * action_size
