class ChildrenValuePrinter(HumanPrintWrapper):
def __init__(self, env, value_fun):
"""
Args:
value_fun: callable: obs, states -> value, which would be call by key
`states`
"""
super().__init__(env)
self.render_env = SokobanEnv(**env.init_kwargs)
self.value_fun = value_fun
def formatted_state_value(self, state):
return "{:.2f}".format(self.value_fun(states=state)[0][0])
def build_texts(self, obs, reward, done, info):
child_values = list()
state = self.env.clone_full_state()
value_str = self.formatted_state_value(state)
for action in range(self.render_env.action_space.n):
self.render_env.restore_full_state(state)
self.render_env.step(action)
child_state = self.render_env.clone_full_state()
child_value_str = self.formatted_state_value(child_state)
child_values.append(child_value_str)
print('Children values: {}'.format(" ".join(child_values)))
return [
'Value: {}'.format(value_str),
'Children values: {}'.format(" ".join(child_values))
]
def test_serialization(dim=(8, 8),
num_boxes=1,
mode='rgb_array',
seed=None,
curriculum=300):
from ctypes import c_uint
if not seed:
_, seed = seeding.np_random(None)
env = SokobanEnv(dim_room=dim,
max_steps=100,
num_boxes=num_boxes,
mode=mode,
curriculum=curriculum)
env.seed(seed)
env.reset()
state = env.clone_full_state()
obs = env.render(mode='rgb_array')
value = np.float32(5.0)
shapes = (state.shape, obs.shape, (1, ))
type = (state.dtype, obs.dtype, np.float32)
buf_size = env.max_steps * np.array([np.prod(x) for x in shapes])
game = [(state, obs, value), (state, obs, value)]
serial = serialize_game(game, type, buf_size)
zz = np.frombuffer(serial, dtype=np.uint8)
dgame = deserialize_game(serial, buf_size, shapes, type)
return [[(i == j).all() for i, j in zip(a, b)]
for a, b in zip(game, dgame)]
class PolicyFromFullTree(Policy):
def __init__(self, value_fn, env_kwargs, depth=4):
self.render_env = SokobanEnv(**env_kwargs)
self.env_n_actions = self.render_env.action_space.n
self.value_function = value_fn
self.env = SokobanEnv(**env_kwargs)
self.env.reset()
self.depth = depth
self.nodes = dict()
def best_actions(self, state):
# Produce all action sequences
seq_ = [range(self.env.action_space.n)] * self.depth
action_seq = list(product(*seq_))
# print("len(action_seq) {}".format(len(action_seq)))
for actions in action_seq:
root_action = actions[0]
self.env.restore_full_state(state)
branch_reward = 0
current_depth = 0
for action in actions:
current_depth += 1
ob, reward, done, _ = self.env.step(action)
branch_reward += reward
node = tuple(self.env.clone_full_state())
if node not in self.nodes:
value = self.value_function(
states=np.array(node)
) # self.model.predict(np.expand_dims(ob, axis=0))[0]
if done:
value += 1000
self.nodes[node] = (value, branch_reward, current_depth,
root_action, actions[:current_depth])
else:
value, previous_reward, previous_depth, _, _ = self.nodes[
node]
if previous_depth > current_depth:
# if previous_reward > branch_reward:
# assert branch_reward > 10., "{} {}".format(previous_reward, branch_reward)
self.nodes[node] = (value, branch_reward,
current_depth, root_action,
actions[:current_depth])
if done:
break
# self.nodes.values()
best_node = max(
self.nodes.keys(),
key=(lambda node: self.nodes[node][0] + self.nodes[node][1]))
node_value, branch_reward, current_depth, root_action, actions = self.nodes[
best_node]
# print("Distinct leaves {}".format(len(self.nodes)))
# print("Node value {}, reward {:.1f}, depth {}, action {}, actions {}".format(
# node_value, branch_reward, current_depth, root_action, actions))
return [root_action]
def test_room_to_binary_map_and_back():
env = SokobanEnv()
for _ in range(100):
env.reset()
flat_state = env.clone_full_state()
(state, structure) = render_utils.get_room_state_and_structure(
flat_state, env.dim_room)
room = render_utils.make_standalone_state(state, structure)
binary_map = render_utils.room_to_binary_map(room)
converted_room = render_utils.binary_map_to_room(binary_map)
assert (converted_room == room).all()
def test_recover(dim=(13, 13), num_boxes=5, mode='rgb_array', seed=None):
if not seed:
_, seed = seeding.np_random(None)
env = SokobanEnv(dim_room=dim,
max_steps=100,
num_boxes=num_boxes,
mode=mode,
max_distinct_rooms=10)
env.seed(seed)
env.reset()
obs = env.render()
state = env.clone_full_state()
print(state == env.recover_state(obs))
def generate_next_frame_and_done_data(env_kwargs,
seed,
n_trajectories=100,
trajectory_len=40,
clone_done=100):
num_boxes_range = next_frame_and_done_data_params()["num_boxes_range"]
if num_boxes_range is None:
print("num_boxes_range", num_boxes_range)
num_boxes_range = [env_kwargs["num_boxes"]]
env_kwargs = deepcopy(env_kwargs)
np.random.seed(seed)
env_kwargs["num_boxes"] = num_boxes_range[np.random.randint(
len(num_boxes_range))]
render_env = SokobanEnv(**env_kwargs)
render_env.seed(seed)
trajectories = list() # [(observations, actions, done), ...]
for i in range(n_trajectories):
render_env.reset()
state = render_env.clone_full_state()
# generate random path
trajectories.append(
random_trajectory(state, render_env, trajectory_len))
# parse trajectories into arrays
data_x = list()
data_y_next_frame = list()
data_y_if_done = list()
for obs, actions, done in trajectories:
data_x.extend([
image_with_embedded_action(ob, action, render_env.action_space.n)
for ob, action in zip(obs[:-1], actions)
])
data_y_next_frame.extend([ob for ob in obs[1:]])
data_y_if_done.extend([False] * (len(actions) - 1) + [done])
if done and (clone_done > 1):
data_x.extend([data_x[-1].copy() for _ in range(clone_done)])
data_y_next_frame.extend(
[data_y_next_frame[-1].copy() for _ in range(clone_done)])
data_y_if_done.extend(
[data_y_if_done[-1] for _ in range(clone_done)])
data_x = np.array(data_x)
data_y = {
Target.NEXT_FRAME.value: np.array(data_y_next_frame),
"if_done": np.array(data_y_if_done).reshape((-1, 1)).astype(int),
}
return data_x, data_y, {}
class QFromV(object):
def __init__(self,
value_function,
env_kwargs,
nan_for_zero_value=True,
copy_negative=True):
self.value_function = value_function
self.env = SokobanEnv(**env_kwargs)
self.env.reset()
self.nan_for_zero_value = nan_for_zero_value
self.copy_negative_values = copy_negative
@property
def env_n_actions(self):
return self.env.action_space.n
def q_values(self, state):
q_values = list()
if self.nan_for_zero_value:
# Value might not have children for Sokoban success states.
if self.value_function(states=state) == 0:
return [np.nan] * self.env_n_actions
if self.copy_negative_values:
# For speed-up
val = self.value_function(states=state)[0]
if val < 0:
return [val] * self.env_n_actions
for action in range(self.env_n_actions):
self.env.restore_full_state(state)
ob, reward, done, _ = self.env.step(action)
value = reward
child_state = self.env.clone_full_state()
if not done:
value += self.value_function(states=child_state)[0]
q_values.append(float(value))
return q_values