from src.automata.ldba import LDBA
# an example automaton for "iron then wood then work_bench" or
# "F (iron & XF (wood & XF (work_bench)))"
# only the automaton "step" function and the "accepting_sets" attribute need to be specified
# "accepting_sets" for Generalised Büchi Accepting (more details here https://bit.ly/ldba_paper)
minecraft_6 = LDBA(accepting_sets=[[3]])
# "step" function for the automaton transitions (input: label, output: automaton_state, un-accepting sink state is "-1")
def step(self, label):
# state 0
if self.automaton_state == 0:
if 'iron' in label:
self.automaton_state = 1
else:
self.automaton_state = 0
# state 1
elif self.automaton_state == 1:
if 'wood' in label:
self.automaton_state = 2
else:
self.automaton_state = 1
# state 2
elif self.automaton_state == 2:
if 'work_bench' in label:
self.automaton_state = 3
else:
self.automaton_state = 2
# state 3
elif self.automaton_state == 3:
from src.automata.ldba import LDBA
# an example automaton for "visiting goal1 and goal2 infinitely often" or
# "GF goal1 & GF goal2"
# only the automaton "step" function and the "accepting_sets" attribute need to be specified
# "accepting_sets" for Generalised Büchi Accepting (more details here https://bit.ly/ldba_paper)
surveillance = LDBA(accepting_sets=[[0]])
# "step" function for the automaton transitions (input: label, output: automaton_state, un-accepting sink state is "-1")
def step(self, label):
# state 0
if self.automaton_state == 0:
if 'goal1' in label:
self.automaton_state = 2
else:
self.automaton_state = 1
# state 1
elif self.automaton_state == 1:
if 'goal1' in label:
self.automaton_state = 2
else:
self.automaton_state = 1
# state 2
elif self.automaton_state == 2:
if 'goal2' in label:
self.automaton_state = 0
else:
self.automaton_state = 2
# step function returns the new automaton state
return self.automaton_state
from src.automata.ldba import LDBA
# an example automaton for "goal1 or goal2 while avoiding unsafe" or "(FG goal1 | FG goal2) & G !unsafe"
# automaton image is available in "./assets" or "https://i.imgur.com/gyDED4O.png"
# only the automaton "step" function and the "accepting_sets" attribute need to be specified
# "accepting_sets" for Generalised Büchi Accepting (more details here https://bit.ly/ldba_paper)
goal1_or_goal2 = LDBA(accepting_sets=[[1, 2]])
# "step" function for the automaton transitions (input: label, output: automaton_state, un-accepting sink state is "-1")
def step(self, label):
# state 0
if self.automaton_state == 0:
if 'epsilon_1' in label:
self.automaton_state = 1
elif 'epsilon_2' in label:
self.automaton_state = 2
elif 'unsafe' in label:
self.automaton_state = -1 # un-accepting sink state
else:
self.automaton_state = 0
# state 1
elif self.automaton_state == 1:
if 'goal1' in label and 'unsafe' not in label:
self.automaton_state = 1
else:
self.automaton_state = -1 # un-accepting sink state
# state 2
elif self.automaton_state == 2:
if 'goal2' in label and 'unsafe' not in label:
self.automaton_state = 2
from src.automata.ldba import LDBA
# an example automaton for "wood then iron then work_bench then gold" or
# "F (wood & XF (iron & XF (work_bench & XF gold)))"
# only the automaton "step" function and the "accepting_sets" attribute need to be specified
# "accepting_sets" for Generalised Büchi Accepting (more details here https://bit.ly/ldba_paper)
minecraft_7 = LDBA(accepting_sets=[[4]])
# "step" function for the automaton transitions (input: label, output: automaton_state, un-accepting sink state is "-1")
def step(self, label):
# state 0
if self.automaton_state == 0:
if 'wood' in label:
self.automaton_state = 1
else:
self.automaton_state = 0
# state 1
elif self.automaton_state == 1:
if 'iron' in label:
self.automaton_state = 2
else:
self.automaton_state = 1
# state 2
elif self.automaton_state == 2:
if 'work_bench' in label:
self.automaton_state = 3
else:
self.automaton_state = 2
# state 3
elif self.automaton_state == 3:
from src.automata.ldba import LDBA
# an example automaton for "goal1 while avoiding unsafe" or "F goal1 & G !unsafe"
# only the automaton "step" function and the "accepting_sets" attribute need to be specified
# "accepting_sets" for Generalised Büchi Accepting (more details here https://bit.ly/ldba_paper)
mars_rover_1_and_3 = LDBA(accepting_sets=[[1]])
# "step" function for the automaton transitions (input: label, output: automaton_state, un-accepting sink state is "-1")
def step(self, label):
# state 0
if self.automaton_state == 0:
if 'goal1' in label and 'unsafe' not in label:
self.automaton_state = 1
elif 'unsafe' in label:
self.automaton_state = -1 # un-accepting sink state
else:
self.automaton_state = 0
# state 1
elif self.automaton_state == 1:
if 'unsafe' in label:
self.automaton_state = -1 # un-accepting sink state
else:
self.automaton_state = 2
# step function returns the new automaton state
return self.automaton_state
# now override the step function
LDBA.step = step.__get__(mars_rover_1_and_3, LDBA)
from src.automata.ldba import LDBA
# an example automaton for "grass then tool_shed" or "F (wood & XF (tool_shed))"
# only the automaton "step" function and the "accepting_sets" attribute need to be specified
# "accepting_sets" for Generalised Büchi Accepting (more details here https://bit.ly/ldba_paper)
minecraft_2 = LDBA(accepting_sets=[[2]])
# "step" function for the automaton transitions (input: label, output: automaton_state, un-accepting sink state is "-1")
def step(self, label):
# state 0
if self.automaton_state == 0:
if 'grass' in label:
self.automaton_state = 1
else:
self.automaton_state = 0
# state 1
elif self.automaton_state == 1:
if 'tool_shed' in label:
self.automaton_state = 2
else:
self.automaton_state = 1
# state 2
elif self.automaton_state == 2:
self.automaton_state = 2
# step function returns the new automaton state
return self.automaton_state
# now override the step function
LDBA.step = step.__get__(minecraft_2, LDBA)
from src.automata.ldba import LDBA
# an example automaton for "(food1 then food2) or (food2 then food1) while avoiding ghost" or
# "(F (food1 & F food2) || F (food2 & F food1)) & G !ghost"
# only the automaton "step" function and the "accepting_sets" attribute need to be specified
# "accepting_sets" for Generalised Büchi Accepting (more details here https://bit.ly/ldba_paper)
pacman_foods = LDBA(accepting_sets=[[1], [2], [3]])
# "step" function for the automaton transitions (input: label, output: automaton_state, un-accepting sink state is "-1")
def step(self, label):
# state 0
if self.automaton_state == 0:
if label is not None and 'food1' in label and 'ghost' not in label:
self.automaton_state = 1
elif label is not None and 'food2' in label and 'ghost' not in label:
self.automaton_state = 2
elif label is not None and 'ghost' in label:
self.automaton_state = -1 # un-accepting sink state
else:
self.automaton_state = 0
# state 1
elif self.automaton_state == 1:
if label is not None and 'food2' in label and 'ghost' not in label:
self.automaton_state = 3
elif label is not None and 'ghost' in label:
self.automaton_state = -1 # un-accepting sink state
else:
self.automaton_state = 1
# state 2
elif self.automaton_state == 2:
from src.automata.ldba import LDBA
# an example automaton for "goal1 then goal2 while avoiding unsafe" or "F (goal1 & XF (goal2)) & G !unsafe"
# automaton image is available in "./assets" or "https://i.imgur.com/R7Zg5mw.png"
# only the automaton "step" function and the "accepting_sets" attribute need to be specified
# "accepting_sets" for Generalised Büchi Accepting (more details here https://bit.ly/ldba_paper)
goal1_then_goal2 = LDBA(accepting_sets=[[2]])
# "step" function for the automaton transitions (input: label, output: automaton_state, un-accepting sink state is "-1")
def step(self, label):
# state 0
if self.automaton_state == 0:
if 'goal1' in label and 'unsafe' not in label:
self.automaton_state = 1
elif 'unsafe' in label:
self.automaton_state = -1 # un-accepting sink state
else:
self.automaton_state = 0
# state 1
elif self.automaton_state == 1:
if 'goal2' in label and 'unsafe' not in label:
self.automaton_state = 2
elif 'unsafe' in label:
self.automaton_state = -1 # un-accepting sink state
else:
self.automaton_state = 1
# state 2
elif self.automaton_state == 2:
if 'unsafe' in label:
self.automaton_state = -1 # un-accepting sink state
def train(
MDP,
LDBA,
algorithm='ql',
episode_num=2500,
iteration_num_max=4000,
discount_factor=0.95,
learning_rate=0.9,
nfq_replay_buffer_size=100,
ddpg_replay_buffer_size=50000,
decaying_learning_rate=False,
epsilon=0.1,
save_dir='./results',
test=True,
average_window=-1,
):
learning_task = LCRL(MDP, LDBA, discount_factor, learning_rate, decaying_learning_rate, epsilon)
if algorithm == 'ql':
learning_task.train_ql(episode_num, iteration_num_max)
import dill
from src.environments.mars_rover_discrete_action import MarsRover
elif algorithm == 'nfq':
learning_task.train_nfq(episode_num, iteration_num_max, nfq_replay_buffer_size)
import dill
from src.environments.mars_rover_discrete_action import MarsRover
elif algorithm == 'ddpg':
learning_task.train_ddpg(episode_num, iteration_num_max, ddpg_replay_buffer_size)
import dill
import tensorflow as tf
from src.environments.mars_rover_continuous_action import MarsRover
else:
raise NotImplementedError('New learning algorithms will be added to lcrl_core.py soon.')
if average_window == -1:
average_window = int(0.03 * episode_num)
plt.plot(learning_task.q_at_initial_state, c="royalblue")
plt.xlabel('Episode Number')
plt.ylabel('Value Function at The Initial State')
plt.grid(True)
if average_window > 0:
avg = np.convolve(learning_task.q_at_initial_state, np.ones((average_window,)) / average_window, mode='valid')
plt.plot(avg, c='darkblue')
# saving the results
results_path = os.path.join(os.getcwd(), save_dir[2:])
dt_string = datetime.now().strftime("%d.%m.%Y_%H.%M.%S")
results_sub_path = os.path.join(os.getcwd(), save_dir[2:], dt_string)
if not os.path.exists(results_path):
os.mkdir(results_path)
os.mkdir(results_sub_path)
plt.savefig(os.path.join(results_sub_path, 'convergence.png'))
plt.show()
if test:
print('testing...')
number_of_tests = 100
number_of_successes = 0
for tt in range(number_of_tests):
learning_task.MDP.reset()
learning_task.LDBA.reset()
# check if MDP current_state is a list or ndarray:
if type(learning_task.MDP.current_state) == np.ndarray:
ndarray = True
test_path = [learning_task.MDP.current_state.tolist()]
else:
ndarray = False
test_path = [learning_task.MDP.current_state]
iteration_num = 0
while learning_task.LDBA.accepting_frontier_set and iteration_num < iteration_num_max \
and learning_task.LDBA.automaton_state != -1:
iteration_num += 1
if ndarray:
if algorithm == "nfq":
current_state = MDP.current_state.tolist() + [LDBA.automaton_state]
if algorithm == "ddpg":
current_state = MDP.current_state.tolist() + [LDBA.automaton_state]
prev_state = np.array(current_state[0:2].copy())
else:
current_state = learning_task.MDP.current_state + [learning_task.LDBA.automaton_state]
if learning_task.epsilon_transitions_exists:
product_MDP_action_space = learning_task.action_space_augmentation()
else:
product_MDP_action_space = MDP.action_space
if not algorithm == "ddpg":
Qs = []
if (not ndarray) and (str(current_state) in learning_task.Q.keys()):
for action_index in range(len(product_MDP_action_space)):
Qs.append(learning_task.Q[str(current_state)][product_MDP_action_space[action_index]])
elif ndarray:
for action_index in range(len(product_MDP_action_space)):
Qs.append(learning_task.Q[current_state[-1]].predict(
[MDP.current_state.tolist() + [action_index]]))
else:
Qs.append(0)
maxQ_action_index = random.choice(np.where(Qs == np.max(Qs))[0])
maxQ_action = product_MDP_action_space[maxQ_action_index]
# check if an epsilon-transition is taken
if learning_task.epsilon_transitions_exists and \
maxQ_action_index > len(learning_task.MDP.action_space) - 1:
epsilon_transition_taken = True
else:
epsilon_transition_taken = False
if epsilon_transition_taken:
next_MDP_state = learning_task.MDP.current_state if not ndarray else learning_task.MDP.current_state.tolist()
next_automaton_state = learning_task.LDBA.step(maxQ_action)
else:
next_MDP_state = learning_task.MDP.step(maxQ_action)
next_automaton_state = learning_task.LDBA.step(learning_task.MDP.state_label(next_MDP_state))
if ndarray:
next_MDP_state = next_MDP_state.tolist()
else:
# action space bounds
lower_bound = -1
upper_bound = 1
tf_prev_state = tf.expand_dims(tf.convert_to_tensor(prev_state), 0)
sampled_actions = tf.squeeze(learning_task.Q[current_state[-1]](tf_prev_state))
sampled_actions = sampled_actions.numpy()
legal_action = np.clip(sampled_actions, lower_bound, upper_bound)
action = np.squeeze(legal_action)
if learning_task.epsilon_transitions_exists and \
LDBA.automaton_state in LDBA.epsilon_transitions.keys() and \
random.random() > 0.5:
epsilon_action = random.choice(product_MDP_action_space[2:])
action = [np.squeeze(
int(epsilon_action[-1]) + learning_task.upper_bound
)]
epsilon_transition_taken = True
else:
epsilon_transition_taken = False
# product MDP modification (for more details refer to https://bit.ly/LCRL_CDC_2019)
if epsilon_transition_taken:
next_MDP_state = MDP.current_state.tolist()
next_automaton_state = LDBA.step(epsilon_action)
else:
next_MDP_state = MDP.step(action).tolist()
next_automaton_state = LDBA.step(MDP.state_label(next_MDP_state))
state = np.array(next_MDP_state.copy())
# product MDP: synchronise the automaton with MDP
current_state = next_MDP_state + [next_automaton_state]
test_path.append(next_MDP_state)
if not epsilon_transition_taken:
learning_task.LDBA.accepting_frontier_function(next_automaton_state)
if not learning_task.LDBA.accepting_frontier_set:
number_of_successes += 1
print('success rate in testing: ' + str(100 * number_of_successes / number_of_tests) + '%')
if isinstance(MDP, SlipperyGrid) and test:
# plt.plot(learning_task.path_length, c='royalblue')
# plt.xlabel('Episode Number')
# plt.ylabel('Agent Traversed Distance from The Initial State')
# plt.grid(True)
# if average_window > 0:
# avg = np.convolve(learning_task.path_length, np.ones((average_window,)) / average_window, mode='valid')
# plt.plot(avg, c='darkblue')
# plt.savefig(os.path.join(results_sub_path, 'traversed distance in the grid.png'))
# plt.show()
distinct_labels = np.unique(learning_task.MDP.labels)
labels_dic = {}
label_indx = 0
bounds = [-0.9]
cmap = plt.get_cmap('gist_rainbow')
for label in distinct_labels:
labels_dic[label] = label_indx
bounds.append(bounds[-1] + 1)
label_indx += 1
color_map = cmap(np.linspace(0, 1, len(distinct_labels)))
cmap = colors.ListedColormap(color_map)
norm = colors.BoundaryNorm(bounds, cmap.N)
labels_value = np.zeros([learning_task.MDP.shape[0], learning_task.MDP.shape[1]])
for i in range(learning_task.MDP.shape[0]):
for j in range(learning_task.MDP.shape[1]):
labels_value[i][j] = labels_dic[learning_task.MDP.state_label([i, j])]
patches = [mpatches.Patch(color=color_map[i], label=list(distinct_labels)[i]) for i in
range(len(distinct_labels))]
plt.imshow(labels_value, interpolation='nearest', cmap=cmap, norm=norm)
plt.legend(handles=patches, bbox_to_anchor=(1.05, 1), loc=2, borderaxespad=0.)
path_x, path_y = np.array(test_path).T
plt.scatter(path_y, path_x, c='lime', edgecolors='teal')
plt.scatter(path_y[0], path_x[0], c='red', edgecolors='black')
plt.annotate('s_0', (path_y[0], path_x[0]), fontsize=15, xytext=(20, 20), textcoords="offset points",
va="center", ha="left",
bbox=dict(boxstyle="round", fc="w"),
arrowprops=dict(arrowstyle="->"))
plt.title('This policy is synthesised by the trained agent')
plt.savefig(
os.path.join(results_sub_path, 'tested_policy.png'), bbox_inches="tight")
plt.show()
is_gif = input(
'Would you like to create a gif for the the control policy? '
'If so, type in "y", otherwise, type in "n". ')
if is_gif == 'y' or is_gif == 'Y':
animate(learning_task.MDP, test_path, results_sub_path, labels_value, cmap, norm, patches)
print('\n---------------------------------\n')
print('The results have been saved here:\n')
print(results_sub_path)
return learning_task
if isinstance(MDP, MarsRover) and test:
plt.imshow(MDP.background)
path_x, path_y = np.array(test_path).T
plt.scatter(path_y, path_x, c='lime', edgecolors='teal')
plt.scatter(path_y[0], path_x[0], c='red', edgecolors='black')
plt.annotate('s_0', (path_y[0], path_x[0]), fontsize=15, xytext=(20, 20), textcoords="offset points",
va="center", ha="left",
bbox=dict(boxstyle="round", fc="w"),
arrowprops=dict(arrowstyle="->"))
plt.title('This policy is synthesised by the trained agent')
plt.savefig(
os.path.join(results_sub_path, 'tested_policy.png'), bbox_inches="tight")
plt.show()
is_gif = input(
'Would you like to create a gif for the the control policy? '
'If so, type in "y", otherwise, type in "n". ')
if is_gif == 'y' or is_gif == 'Y':
animate(learning_task.MDP, test_path, results_sub_path, labels_value, cmap, norm, patches)
print('\n---------------------------------\n')
print('The results have been saved here:\n')
print(results_sub_path)
return learning_task
if algorithm == 'ql':
with open(os.path.join(results_sub_path, 'learned_model.pkl'), 'wb') as learning_file:
dill.dump(learning_task, learning_file)
if test:
with open(os.path.join(results_sub_path, 'test_results.pkl'), 'wb') as test_file:
dill.dump(test_path, test_file)
print('In order to load the learning results use the following command in Python console:')
print('import dill')
print("learned_model = dill.load(open('" + os.path.join(results_sub_path, 'learned_model.pkl') + "', 'rb'))")
if test:
print("tested_trace = dill.load(open('" + os.path.join(results_sub_path, 'test_results.pkl') + "', 'rb'))")
print('\n---------------------------------\n')
if learning_task.early_interruption == 0:
print("Training finished successfully!")
else:
print("Training results have been saved successfully! [Note: training was interrupted by user]")
return learning_task
# TODO: change the save method and add nfq & ddpg
return learning_task
from src.automata.ldba import LDBA
# an example automaton for "goal1" or "F goal1"
# only the automaton "step" function and the "accepting_sets" attribute need to be specified
# "accepting_sets" for Generalised Büchi Accepting (more details here https://bit.ly/ldba_paper)
slp_easy = LDBA(accepting_sets=[[1]])
# "step" function for the automaton transitions (input: label, output: automaton_state, un-accepting sink state is "-1")
def step(self, label):
# state 0
if self.automaton_state == 0:
if 'goal1' in label:
self.automaton_state = 1
else:
self.automaton_state = 0
# state 1
elif self.automaton_state == 1:
self.automaton_state = 1
# step function returns the new automaton state
return self.automaton_state
# now override the step function
LDBA.step = step.__get__(slp_easy, LDBA)
# finally, does the LDBA contains an epsilon transition? if so then
# for each state with outgoing epsilon-transition define a different epsilon
# example: <LDBA_object>.epsilon_transitions = {0: ['epsilon_0'], 4: ['epsilon_1']}
# "0" and "4" are automaton_states
from src.automata.ldba import LDBA
# an example automaton for "goal1 while avoiding unsafe" or "F goal1 & G !unsafe"
# only the automaton "step" function and the "accepting_sets" attribute need to be specified
# "accepting_sets" for Generalised Büchi Accepting (more details here https://bit.ly/ldba_paper)
frozenlake_reach_avoid = LDBA(accepting_sets=[[1]])
# "step" function for the automaton transitions (input: label, output: automaton_state, un-accepting sink state is "-1")
def step(self, label):
# state 0
if self.automaton_state == 0:
if 'goal1' in label and 'unsafe' not in label:
self.automaton_state = 1
elif 'unsafe' in label:
self.automaton_state = -1 # un-accepting sink state
else:
self.automaton_state = 0
# state 1
elif self.automaton_state == 1:
if 'unsafe' in label:
self.automaton_state = -1 # un-accepting sink state
else:
self.automaton_state = 2
# step function returns the new automaton state
return self.automaton_state
# now override the step function
LDBA.step = step.__get__(frozenlake_reach_avoid, LDBA)
from src.automata.ldba import LDBA
# an example automaton for "goal1 then goal2 then goal3 then goal4" or
# "F (goal1 & XF (goal2 & XF (goal3 & XF goal4)))"
# only the automaton "step" function and the "accepting_sets" attribute need to be specified
# "accepting_sets" for Generalised Büchi Accepting (more details here https://bit.ly/ldba_paper)
slp_hard = LDBA(accepting_sets=[[4]])
# "step" function for the automaton transitions (input: label, output: automaton_state, un-accepting sink state is "-1")
def step(self, label):
# state 0
if self.automaton_state == 0:
if 'goal1' in label:
self.automaton_state = 1
else:
self.automaton_state = 0
# state 1
elif self.automaton_state == 1:
if 'goal2' in label:
self.automaton_state = 2
else:
self.automaton_state = 1
# state 2
elif self.automaton_state == 2:
if 'goal3' in label:
self.automaton_state = 3
else:
self.automaton_state = 2
# state 3
elif self.automaton_state == 3:
from src.automata.ldba import LDBA
# an example automaton for "goal2 then goal1 while avoiding unsafe" or "F (goal2 & XF (goal1)) & G !unsafe"
# only the automaton "step" function and the "accepting_sets" attribute need to be specified
# "accepting_sets" for Generalised Büchi Accepting (more details here https://bit.ly/ldba_paper)
mars_rover_2_and_4 = LDBA(accepting_sets=[[1]])
# "step" function for the automaton transitions (input: label, output: automaton_state, un-accepting sink state is "-1")
def step(self, label):
# state 0
if self.automaton_state == 0:
if 'goal1' in label and 'unsafe' not in label:
self.automaton_state = 1
elif 'unsafe' in label:
self.automaton_state = -1 # un-accepting sink state
else:
self.automaton_state = 0
# state 1
elif self.automaton_state == 1:
if 'unsafe' in label:
self.automaton_state = -1 # un-accepting sink state
else:
self.automaton_state = 2
# step function returns the new automaton state
return self.automaton_state
# now override the step function
LDBA.step = step.__get__(mars_rover_2_and_4, LDBA)
