def __init__(self, env, max_layer):
self.env = env
self.modifications = []
self.counter = 0
self.nodes = []
agent = QAgent(env)
agent.qlearn(600, show=False)
wall_dict = wall_interference(agent)
cell_dict = cell_frequency(agent)
for element in wall_dict:
self.modifications.append((0, element[0][0], element[0][1]))
for element in cell_dict[0:14]:
self.modifications.append((1, element[0][0], element[0][1]))
self.num_nodes = 0
self.root = None
self.max_layer = max_layer
self.threshold = 8
# Storing best reward and corresponding environment
self.max_reward = float("-inf")
self.opt_env = None
def path_based(env, num_mods):
# Train agent in original environment
agent = QAgent(env)
agent.qlearn(600, render=False)
cell_dict = cell_frequency(agent)
wall_dict = wall_interference(agent)
opt_seq = None
opt_val = float("-inf")
for k in range(num_mods):
seq = []
ref = copy.deepcopy(env)
# Pick k modifications on walls
walls_to_remove = [wall_dict[i][0] for i in range(k)]
for wall in walls_to_remove:
ref = ref.transition([(wall)])
seq.append((0, wall[0], wall[1]))
num_special_cells = num_mods - k
cells_to_assign = [cell_dict[i][0] for i in range(num_special_cells)]
for cell in cells_to_assign:
ref.special.append(cell)
seq.append((1, cell[0], cell[1]))
agent_k = QAgent(ref)
print(colored("Iteration {} begins!".format(k), "red"))
print(ref.walls, ref.special)
agent_k.qlearn(600, render=False)
rews = utility(agent_k)
if rews > opt_val:
opt_val = rews
opt_seq = seq
return (opt_seq, opt_val)
def greedy(env, num_mods):
# This function returns the sequence of modifications based on the wall and cell heuristics
# Parameters
# ===============================================================
# env: the original environment
# num_mods: the number of modifications
# ===============================================================
greedy_seq = []
ref = copy.deepcopy(env)
agent = None
for i in range(num_mods):
# For each iteration, find out the wall that most interferes and the cell that is crossed the most. Try out all options.
if i == 0:
agent = QAgent(ref)
agent.qlearn(600, render=False)
else:
agent = connected_qlearn(agent, ref, 300)
# Take out the lists from the heuristics.
wall_dict = wall_interference(agent)
cell_dict = cell_frequency(agent)
# Take out the max values, and the options to try out.
wall_nums = [elem[1] for elem in wall_dict]
max_wall = max(wall_nums)
cell_nums = [elem[1] for elem in cell_dict]
max_cell = max(cell_nums)
wall_options = [elem[0] for elem in wall_dict if elem[1] == max_wall]
cell_options = [elem[0] for elem in cell_dict if elem[1] == max_cell]
# Test out all the options, get optimal modification
opt_value = float("-inf")
opt_choice = None
category = -1
for wall in wall_options:
print(colored("Testing environment", "red"))
e = ref.transition([wall])
new_agent = connected_qlearn(agent, e, 300)
# Get utility
val = utility(new_agent)
if val > opt_value:
opt_value = val
opt_choice = wall
category = 0
for cell in cell_options:
print(colored("Testing environment", "red"))
e = copy.deepcopy(ref)
e.special.append(cell)
new_agent = connected_qlearn(agent, e, 300)
# Get utility
val = utility(new_agent)
if val > opt_value:
opt_value = val
opt_choice = cell
category = 1
assert (category != -1)
# Store found modification and change the reference environment
if category == 0:
mod = (0, opt_choice[0], opt_choice[1])
greedy_seq.append(mod)
ref = ref.transition([opt_choice])
elif category == 1:
mod = (1, opt_choice[0], opt_choice[1])
greedy_seq.append(mod)
ref.special.append(opt_choice)
# Evaluate utility
total_agent = QAgent(ref)
total_agent.qlearn(600, render=False)
result = utility(total_agent)
# print(colored(result, "red"))
return greedy_seq, result
num_processes = 10
processes = []
manager = Manager()
agents = manager.list()
for i in range(rounds * num_processes):
agents.append(0) # keeper
categories = []
num_mods = 1
map_to_numpy = np.asarray(map, dtype="c")
env = TaxiEnv(map_to_numpy) # reference environment
orig_agent = QAgent(env)
orig_agent.qlearn(600, show=False)
cell_dict = cell_frequency(orig_agent)
wall_dict = wall_interference(orig_agent)
modifications = []
for element in wall_dict:
modifications.append((0, element[0]))
for element in cell_dict[0:14]:
row, col = element[0]
modifications.append((1, (row, col)))
for iter in range(rounds):
print(colored("Data addition round {} begins!".format(iter), "red"))
for i in range(num_processes):
results = simulate_env(env, num_mods)
modified = results[0]
categories.append(results[1])
index = random.randint(index + 1, N - k + i)
res.append(list[index])
return res
if num_mods == 6:
num_trials = int(2e+6)
else:
num_trials = int(1e+6)
agent = QAgent(env)
agent.qlearn(600, show=False)
cell_dict = cell_frequency(agent)
wall_dict = wall_interference(agent)
modifications = []
for element in wall_dict:
modifications.append((0, element[0][0], element[0][1]))
for element in cell_dict[0:14]:
row, col = element[0]
modifications.append((1, row, col))
# Initialize and build heap
sz = min(12 * num_mods, len(x_test))
h = Heap(model, x_test[0:sz], sz)
h.build_heap()
ls = []