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run_intellilight.py
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run_intellilight.py
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import gym
from environment import TSCEnv
from world import World
from generator import LaneVehicleGenerator
from generator import IntersectionVehicleGenerator
from agent.intellilight_agent import IntelliLightAgent, paras
from metric import TravelTimeMetric
import argparse
import os
import json
import copy
import math
import time
import numpy as np
from tensorflow import set_random_seed
import random
SEED = 31200
random.seed(SEED)
np.random.seed(SEED)
set_random_seed((SEED))
"""
currently only support training on single agent since its designed as a single intersection algorithm.
you may test it in the multi-agent with parameter-sharing.
"""
def parse_arguments():
parser = argparse.ArgumentParser()
parser.add_argument('config_file', type=str, help='path of config file')
parser.add_argument('--thread', type=int, default=1, help='number of threads')
parser.add_argument('--steps', type=int, default=3600, help='number of steps')
parser.add_argument("-s", "--silent", action="store_true")
return parser.parse_args()
args = parse_arguments()
# create world
world = World(args.config_file, thread_num=args.thread)
# create agents
agents = []
for idx, i in enumerate(world.intersections):
action_space = gym.spaces.Discrete(len(i.phases))
agents.append(IntelliLightAgent(
action_space,
[
LaneVehicleGenerator(world, i, ["lane_waiting_count"], in_only=True, average="lane"),
LaneVehicleGenerator(world, i, ["lane_count"], in_only=True, average="lane"),
LaneVehicleGenerator(world, i, ["lane_waiting_time_count"], in_only=True, average="lane"),
IntersectionVehicleGenerator(world, i, targets=["vehicle_map"])
],
[
LaneVehicleGenerator(world, i, ["lane_waiting_count", "lane_delay", "lane_waiting_time_count"],
in_only=True, average="all"),
IntersectionVehicleGenerator(world, i, targets=["passed_count", "passed_time_count"])
],
world,
idx
))
# create metric
metric = TravelTimeMetric(world)
# create env
env = TSCEnv(world, agents, metric)
class TrafficLightDQN:
def __init__(self, agents, env):
self.agent = agents[0]
self.env = env
self.world = world
self.yellow_time = self.world.intersections[0].yellow_phase_time
def _generate_pre_train_ratios(self, phase_min_time, em_phase):
phase_traffic_ratios = [phase_min_time]
# generate how many varients for each phase
for i, phase_time in enumerate(phase_min_time):
if i == em_phase:
for j in range(1, 5, 1):
gen_phase_time = copy.deepcopy(phase_min_time)
gen_phase_time[i] += j
phase_traffic_ratios.append(gen_phase_time)
else:
# pass
for j in range(1, 5, 1):
gen_phase_time = copy.deepcopy(phase_min_time)
gen_phase_time[i] += j
phase_traffic_ratios.append(gen_phase_time)
for j in range(5, 20, 5):
gen_phase_time = copy.deepcopy(phase_min_time)
gen_phase_time[i] += j
phase_traffic_ratios.append(gen_phase_time)
return phase_traffic_ratios
def get_phase(self, action, last_phase):
if action == 0:
return last_phase
else:
phase = last_phase + 1
if phase >= 8:
phase = 0
return phase
def train(self, if_pretrain, use_average):
if if_pretrain:
total_run_cnt = paras["RUN_COUNTS_PRETRAIN"] #10000
phase_traffic_ratios = self._generate_pre_train_ratios(paras["BASE_RATIO"], em_phase=0) # en_phase=0
pre_train_count_per_ratio = math.ceil(total_run_cnt / len(phase_traffic_ratios))
ind_phase_time = 0
else:
total_run_cnt = paras["RUN_COUNTS"]
# initialize output streams
if not os.path.exists(paras["PATH_TO_OUTPUT"]):
os.makedirs(paras["PATH_TO_OUTPUT"])
file_name_memory = os.path.join(paras["PATH_TO_OUTPUT"], "memories.txt")
num_step = args.steps
current_time = 0 # in seconds
obs = env.reset()
ob = obs[0]
last_action = 0
total_steps = 0
while total_steps < total_run_cnt:
total_steps += 1
if current_time >= 3600:
obs = env.reset()
ob = obs[0]
last_action = 0
current_time = 0
if if_pretrain:
if current_time > pre_train_count_per_ratio:
print("Terminal occured. Episode end.")
self.env.reset()
ind_phase_time += 1
if ind_phase_time >= len(phase_traffic_ratios):
break
current_time = self.env.eng.get_current_time() # in seconds
phase_time_now = phase_traffic_ratios[ind_phase_time]
f_memory = open(file_name_memory, "a")
if if_pretrain:
_, q_values = self.agent.choose(state=ob, count=current_time, if_pretrain=if_pretrain)
if ob.time_this_phase[0][0] < phase_time_now[ob.cur_phase[0][0]]:
action_pred = 0
else:
action_pred = 1
# print(ob.time_this_phase)
# print(ob.queue_length)
action = self.agent.next_phase(last_action) if action_pred else last_action
else:
# get action based on e-greedy, combine current state
action, q_values = self.agent.choose(state=ob, count=current_time, if_pretrain=if_pretrain)
next_obs, rewards, dones, info = env.step([action])
if not action == last_action:
for _ in range(self.yellow_time):
next_obs, rewards, dones, info = env.step([action])
reward = rewards[0]
next_ob = next_obs[0]
current_time = self.env.eng.get_current_time()
# remember
self.agent.remember(ob, 1 - (action==last_action), reward, next_ob)
# output to std out and file
memory_str = 'time = %d\taction = %d\tcurrent_phase = %d\tnext_phase = %d\treward = %f' \
'\t%s' \
% (current_time, action,
ob.cur_phase[0][0],
ob.next_phase[0][0],
reward, repr(q_values))
print(memory_str)
f_memory.write(memory_str + "\n")
f_memory.close()
if not if_pretrain:
# update network
self.agent.update_network(if_pretrain, use_average, total_steps)
self.agent.update_network_bar()
last_action = action
ob = next_ob
if if_pretrain:
self.agent.set_update_outdated()
self.agent.update_network(if_pretrain, use_average, total_steps)
self.agent.update_network_bar()
self.agent.reset_update_count()
print("END")
def test(env, args, model_name):
env.agents[0].load_model(model_name)
i = 0
obs = env.reset()
last_action = -1
while i < args.steps:
actions = []
for agent_id, agent in enumerate(env.agents):
actions.append(agent.get_action(obs[agent_id]))
action = actions[0]
obs, rewards, dones, info = env.step(actions)
i += 1
if not action == last_action and i != 0:
for _ in range(env.world.intersections[0].yellow_phase_time):
next_obs, rewards, dones, info = env.step([action])
i += 1
# print(rewards)
if all(dones):
break
last_action = action
trv_time = env.eng.get_average_travel_time()
print("Final Travel Time is %.4f" % trv_time)
return trv_time
if __name__ == "__main__":
player = TrafficLightDQN(agents, env)
player.train(if_pretrain=True, use_average=True)
player.train(if_pretrain=False, use_average=False)
# test(env, args, "602.0")
# test(env, args, "init_model")