def test_private_information_contents(self):
try:
private_observation = make_observation(
self.game,
pyspiel.IIGObservationType(
public_info=False,
perfect_recall=False,
private_info=pyspiel.PrivateInfoType.SINGLE_PLAYER))
except (RuntimeError, ValueError):
return
player_has_private_info = [False] * self.game.num_players()
for state in self.some_states:
for i in range(self.game.num_players()):
if private_observation.string_from(state, i) != \
pyspiel.PrivateObservation.NOTHING:
player_has_private_info[i] = True
if self.game_type.information == \
pyspiel.GameType.Information.IMPERFECT_INFORMATION:
self.assertTrue(any(player_has_private_info))
if self.game_type.information == \
pyspiel.GameType.Information.PERFECT_INFORMATION:
none_of = lambda x: not any(x)
self.assertTrue(none_of(player_has_private_info))
def test_compression_binary(self):
# All infostates for leduc are binary, so we can compress them effectively.
game = pyspiel.load_game("leduc_poker")
obs1 = make_observation(
game, pyspiel.IIGObservationType(perfect_recall=True))
obs2 = make_observation(
game, pyspiel.IIGObservationType(perfect_recall=True))
self.assertLen(obs1.tensor, 30) # 30 floats = 120 bytes
for state in get_all_states.get_all_states(game).values():
for player in range(game.num_players()):
obs1.set_from(state, player)
compressed = obs1.compress()
self.assertEqual(type(compressed), bytes)
self.assertLen(compressed, 5)
obs2.decompress(compressed)
np.testing.assert_array_equal(obs1.tensor, obs2.tensor)
def test_leduc_info_state(self):
game = pyspiel.load_game("leduc_poker")
observation = make_observation(
game, pyspiel.IIGObservationType(perfect_recall=True))
state = game.new_initial_state()
state.apply_action(1) # Deal 1
state.apply_action(2) # Deal 2
state.apply_action(2) # Bet
state.apply_action(1) # Call
state.apply_action(3) # Deal 3
observation.set_from(state, player=0)
np.testing.assert_array_equal(observation.tensor, [
1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0
])
self.assertEqual(
list(observation.dict),
["player", "private_card", "community_card", "betting"])
np.testing.assert_array_equal(observation.dict["player"], [1, 0])
np.testing.assert_array_equal(observation.dict["private_card"],
[0, 1, 0, 0, 0, 0])
np.testing.assert_array_equal(observation.dict["community_card"],
[0, 0, 0, 1, 0, 0])
np.testing.assert_array_equal(
observation.dict["betting"],
[
[[0, 1], [1, 0], [0, 0], [0, 0]], # First round
[[0, 0], [0, 0], [0, 0], [0, 0]], # Second round
])
self.assertEqual(
observation.string_from(state, 0),
"[Round 2][Player: 0][Pot: 6][Money: 97 97[Private: 1]]"
"[Round1]: 2 1[Public: 3]\nRound 2 sequence: ")
def change_observation(self, game: pyspiel.Game, player: int,
public_info: bool, perfect_recall: bool,
private_info: pyspiel.PrivateInfoType):
self.player = player
observation_type = pyspiel.IIGObservationType(public_info,
perfect_recall,
private_info)
try:
self.observation = make_observation(game, observation_type)
except RuntimeError as e:
self.observation = None
logging.warning("Could not make observation: ", e)
def test_no_invalid_public_observations(self):
try:
public_observation = make_observation(
self.game,
pyspiel.IIGObservationType(
public_info=True,
perfect_recall=False,
private_info=pyspiel.PrivateInfoType.NONE))
except (ValueError, RuntimeError):
return
for state in self.some_states:
self.assertNotEqual(public_observation.string_from(state, 0),
pyspiel.PublicObservation.INVALID)
def update(self, state: pyspiel.State):
try:
fen = str(state)
board = chess.Board(fen)
obs_type = pyspiel.IIGObservationType(
public_info=True, perfect_recall=False,
private_info=pyspiel.PrivateInfoType.SINGLE_PLAYER)
observation = make_observation(state.get_game(), obs_type)
for player in range(2):
observation.set_from(state, player)
self.write_image(board, observation, player)
except RuntimeError as e:
# Might throw if we use a different board size than 8.
# Ignore the rendering then.
logging.warning(e)
def test_leduc_all_player_privates(self):
game = pyspiel.load_game("leduc_poker")
observation = make_observation(
game,
pyspiel.IIGObservationType(
perfect_recall=True,
private_info=pyspiel.PrivateInfoType.ALL_PLAYERS))
state = game.new_initial_state()
state.apply_action(1) # Deal 1
state.apply_action(2) # Deal 2
state.apply_action(2) # Bet
state.apply_action(1) # Call
state.apply_action(3) # Deal 3
observation.set_from(state, player=0)
np.testing.assert_array_equal(observation.dict["private_cards"], [
[0, 1, 0, 0, 0, 0],
[0, 0, 1, 0, 0, 0],
])
def test_consistent(self):
"""Checks the Python and C++ game implementations are the same."""
py_game = pyspiel.load_game("python_kuhn_poker")
cc_game = pyspiel.load_game("kuhn_poker")
obs_types = [None, pyspiel.IIGObservationType(perfect_recall=True)]
py_observations = [make_observation(py_game, o) for o in obs_types]
cc_observations = [make_observation(cc_game, o) for o in obs_types]
py_states = get_all_states(py_game)
cc_states = get_all_states(cc_game)
self.assertCountEqual(list(cc_states), list(py_states))
for key, cc_state in cc_states.items():
py_state = py_states[key]
np.testing.assert_array_equal(py_state.history(),
cc_state.history())
np.testing.assert_array_equal(py_state.returns(),
cc_state.returns())
for py_obs, cc_obs in zip(py_observations, cc_observations):
for player in (0, 1):
py_obs.set_from(py_state, player)
cc_obs.set_from(cc_state, player)
np.testing.assert_array_equal(py_obs.tensor, cc_obs.tensor)
def make_py_observer(self, iig_obs_type=None, params=None):
"""Returns an object used for observing game state."""
return IteratedPrisonersDilemmaObserver(
iig_obs_type or pyspiel.IIGObservationType(perfect_recall=False),
params)
def playthrough_lines(game_string,
alsologtostdout=False,
action_sequence=None):
"""Returns a playthrough of the specified game as a list of lines.
Actions are selected uniformly at random, including chance actions.
Args:
game_string: string, e.g. 'markov_soccer' or 'kuhn_poker(players=4)'.
alsologtostdout: Whether to also print the trace to stdout. This can be
useful when an error occurs, to still be able to get context information.
action_sequence: A (possibly partial) list of action choices to make.
"""
lines = []
action_sequence = action_sequence or []
if alsologtostdout:
def add_line(v):
print(v)
lines.append(v)
else:
add_line = lines.append
game = _load_game(game_string)
add_line("game: {}".format(game_string))
seed = np.random.randint(2**32 - 1)
game_type = game.get_type()
default_observation = None
try:
default_observation = make_observation(game)
except (RuntimeError, ValueError):
pass
infostate_observation = None
# if game_type.information in (pyspiel.IMPERFECT_INFORMATION,
# pyspiel.ONE_SHOT):
try:
infostate_observation = make_observation(
game, pyspiel.IIGObservationType(perfect_recall=True))
except (RuntimeError, ValueError):
pass
add_line("")
add_line("GameType.chance_mode = {}".format(game_type.chance_mode))
add_line("GameType.dynamics = {}".format(game_type.dynamics))
add_line("GameType.information = {}".format(game_type.information))
add_line("GameType.long_name = {}".format('"{}"'.format(
game_type.long_name)))
add_line("GameType.max_num_players = {}".format(game_type.max_num_players))
add_line("GameType.min_num_players = {}".format(game_type.min_num_players))
add_line("GameType.parameter_specification = {}".format("[{}]".format(
", ".join('"{}"'.format(param)
for param in sorted(game_type.parameter_specification)))))
add_line("GameType.provides_information_state_string = {}".format(
game_type.provides_information_state_string))
add_line("GameType.provides_information_state_tensor = {}".format(
game_type.provides_information_state_tensor))
add_line("GameType.provides_observation_string = {}".format(
game_type.provides_observation_string))
add_line("GameType.provides_observation_tensor = {}".format(
game_type.provides_observation_tensor))
add_line("GameType.provides_factored_observation_string = {}".format(
game_type.provides_factored_observation_string))
add_line("GameType.reward_model = {}".format(game_type.reward_model))
add_line("GameType.short_name = {}".format('"{}"'.format(
game_type.short_name)))
add_line("GameType.utility = {}".format(game_type.utility))
add_line("")
add_line("NumDistinctActions() = {}".format(game.num_distinct_actions()))
add_line("PolicyTensorShape() = {}".format(game.policy_tensor_shape()))
add_line("MaxChanceOutcomes() = {}".format(game.max_chance_outcomes()))
add_line("GetParameters() = {{{}}}".format(",".join(
"{}={}".format(key, _escape(str(value)))
for key, value in sorted(game.get_parameters().items()))))
add_line("NumPlayers() = {}".format(game.num_players()))
add_line("MinUtility() = {:.5}".format(game.min_utility()))
add_line("MaxUtility() = {:.5}".format(game.max_utility()))
try:
utility_sum = game.utility_sum()
except RuntimeError:
utility_sum = None
add_line("UtilitySum() = {}".format(utility_sum))
if infostate_observation and infostate_observation.tensor is not None:
add_line("InformationStateTensorShape() = {}".format(
format_shapes(infostate_observation.dict)))
add_line("InformationStateTensorLayout() = {}".format(
game.information_state_tensor_layout()))
add_line("InformationStateTensorSize() = {}".format(
len(infostate_observation.tensor)))
if default_observation and default_observation.tensor is not None:
add_line("ObservationTensorShape() = {}".format(
format_shapes(default_observation.dict)))
add_line("ObservationTensorLayout() = {}".format(
game.observation_tensor_layout()))
add_line("ObservationTensorSize() = {}".format(
len(default_observation.tensor)))
add_line("MaxGameLength() = {}".format(game.max_game_length()))
add_line('ToString() = "{}"'.format(str(game)))
players = list(range(game.num_players()))
state = game.new_initial_state()
state_idx = 0
rng = np.random.RandomState(seed)
while True:
add_line("")
add_line("# State {}".format(state_idx))
for line in str(state).splitlines():
add_line("# {}".format(line).rstrip())
add_line("IsTerminal() = {}".format(state.is_terminal()))
add_line("History() = {}".format([int(a) for a in state.history()]))
add_line('HistoryString() = "{}"'.format(state.history_str()))
add_line("IsChanceNode() = {}".format(state.is_chance_node()))
add_line("IsSimultaneousNode() = {}".format(
state.is_simultaneous_node()))
add_line("CurrentPlayer() = {}".format(state.current_player()))
if infostate_observation:
for player in players:
s = infostate_observation.string_from(state, player)
if s is not None:
add_line(
f'InformationStateString({player}) = "{_escape(s)}"')
if infostate_observation and infostate_observation.tensor is not None:
for player in players:
infostate_observation.set_from(state, player)
for name, tensor in infostate_observation.dict.items():
label = f"InformationStateTensor({player})"
label += f".{name}" if name != "info_state" else ""
lines += _format_tensor(tensor, label)
if default_observation:
for player in players:
s = default_observation.string_from(state, player)
if s is not None:
add_line(f'ObservationString({player}) = "{_escape(s)}"')
if game.get_type().provides_factored_observation_string:
add_line('PublicObservationString() = "{}"'.format(
_escape(state.public_observation_string())))
for player in players:
add_line('PrivateObservationString({}) = "{}"'.format(
player, _escape(state.private_observation_string(player))))
if default_observation and default_observation.tensor is not None:
for player in players:
default_observation.set_from(state, player)
for name, tensor in default_observation.dict.items():
label = f"ObservationTensor({player})"
label += f".{name}" if name != "observation" else ""
lines += _format_tensor(tensor, label)
if game_type.chance_mode == pyspiel.GameType.ChanceMode.SAMPLED_STOCHASTIC:
add_line('SerializeState() = "{}"'.format(
_escape(state.serialize())))
if not state.is_chance_node():
add_line("Rewards() = {}".format(state.rewards()))
add_line("Returns() = {}".format(state.returns()))
if state.is_terminal():
break
if state.is_chance_node():
# In Python 2 and Python 3, the default number of decimal places displayed
# is different. Thus, we hardcode a ".12" which is Python 2 behaviour.
add_line("ChanceOutcomes() = [{}]".format(", ".join(
"{{{}, {:.12f}}}".format(outcome, prob)
for outcome, prob in state.chance_outcomes())))
if state.is_simultaneous_node():
for player in players:
add_line("LegalActions({}) = [{}]".format(
player,
", ".join(str(x) for x in state.legal_actions(player))))
for player in players:
add_line("StringLegalActions({}) = [{}]".format(
player,
", ".join('"{}"'.format(state.action_to_string(player, x))
for x in state.legal_actions(player))))
if state_idx < len(action_sequence):
actions = action_sequence[state_idx]
else:
actions = [
rng.choice(state.legal_actions(pl)) for pl in players
]
add_line("")
add_line("# Apply joint action [{}]".format(
format(", ".join(
'"{}"'.format(state.action_to_string(player, action))
for player, action in enumerate(actions)))))
add_line("actions: [{}]".format(", ".join(
str(action) for action in actions)))
state.apply_actions(actions)
else:
add_line("LegalActions() = [{}]".format(", ".join(
str(x) for x in state.legal_actions())))
add_line("StringLegalActions() = [{}]".format(
", ".join('"{}"'.format(
state.action_to_string(state.current_player(), x))
for x in state.legal_actions())))
if state_idx < len(action_sequence):
action = action_sequence[state_idx]
else:
action = rng.choice(state.legal_actions())
add_line("")
add_line('# Apply action "{}"'.format(
state.action_to_string(state.current_player(), action)))
add_line("action: {}".format(action))
state.apply_action(action)
state_idx += 1
return lines
def playthrough_lines(game_string,
alsologtostdout=False,
action_sequence=None,
observation_params_string=None,
seed: Optional[int] = None):
"""Returns a playthrough of the specified game as a list of lines.
Actions are selected uniformly at random, including chance actions.
Args:
game_string: string, e.g. 'markov_soccer' or 'kuhn_poker(players=4)'.
alsologtostdout: Whether to also print the trace to stdout. This can be
useful when an error occurs, to still be able to get context information.
action_sequence: A (possibly partial) list of action choices to make.
observation_params_string: Optional observation parameters for constructing
an observer.
seed: A(n optional) seed to initialize the random number generator from.
"""
should_display_state_fn = ShouldDisplayStateTracker()
lines = []
action_sequence = action_sequence or []
should_display = True
def add_line(v, force=False):
if force or should_display:
if alsologtostdout:
print(v)
lines.append(v)
game = pyspiel.load_game(game_string)
add_line("game: {}".format(game_string))
if observation_params_string:
add_line("observation_params: {}".format(observation_params_string))
if seed is None:
seed = np.random.randint(2**32 - 1)
game_type = game.get_type()
default_observation = None
try:
observation_params = pyspiel.game_parameters_from_string(
observation_params_string) if observation_params_string else None
default_observation = make_observation(
game,
imperfect_information_observation_type=None,
params=observation_params)
except (RuntimeError, ValueError) as e:
print("Warning: unable to build an observation: ", e)
infostate_observation = None
# TODO(author11) reinstate this restriction
# if game_type.information in (pyspiel.IMPERFECT_INFORMATION,
# pyspiel.ONE_SHOT):
try:
infostate_observation = make_observation(
game, pyspiel.IIGObservationType(perfect_recall=True))
except (RuntimeError, ValueError):
pass
public_observation = None
private_observation = None
# Instantiate factored observations only for imperfect information games,
# as it would yield unncessarily redundant information for perfect info games.
# The default observation is the same as the public observation, while private
# observations are always empty.
if game_type.information == pyspiel.GameType.Information.IMPERFECT_INFORMATION:
try:
public_observation = make_observation(
game,
pyspiel.IIGObservationType(
public_info=True,
perfect_recall=False,
private_info=pyspiel.PrivateInfoType.NONE))
except (RuntimeError, ValueError):
pass
try:
private_observation = make_observation(
game,
pyspiel.IIGObservationType(
public_info=False,
perfect_recall=False,
private_info=pyspiel.PrivateInfoType.SINGLE_PLAYER))
except (RuntimeError, ValueError):
pass
add_line("")
add_line("GameType.chance_mode = {}".format(game_type.chance_mode))
add_line("GameType.dynamics = {}".format(game_type.dynamics))
add_line("GameType.information = {}".format(game_type.information))
add_line("GameType.long_name = {}".format('"{}"'.format(
game_type.long_name)))
add_line("GameType.max_num_players = {}".format(game_type.max_num_players))
add_line("GameType.min_num_players = {}".format(game_type.min_num_players))
add_line("GameType.parameter_specification = {}".format("[{}]".format(
", ".join('"{}"'.format(param)
for param in sorted(game_type.parameter_specification)))))
add_line("GameType.provides_information_state_string = {}".format(
game_type.provides_information_state_string))
add_line("GameType.provides_information_state_tensor = {}".format(
game_type.provides_information_state_tensor))
add_line("GameType.provides_observation_string = {}".format(
game_type.provides_observation_string))
add_line("GameType.provides_observation_tensor = {}".format(
game_type.provides_observation_tensor))
add_line("GameType.provides_factored_observation_string = {}".format(
game_type.provides_factored_observation_string))
add_line("GameType.reward_model = {}".format(game_type.reward_model))
add_line("GameType.short_name = {}".format('"{}"'.format(
game_type.short_name)))
add_line("GameType.utility = {}".format(game_type.utility))
add_line("")
add_line("NumDistinctActions() = {}".format(game.num_distinct_actions()))
add_line("PolicyTensorShape() = {}".format(game.policy_tensor_shape()))
add_line("MaxChanceOutcomes() = {}".format(game.max_chance_outcomes()))
add_line("GetParameters() = {}".format(
_format_params(game.get_parameters())))
add_line("NumPlayers() = {}".format(game.num_players()))
add_line("MinUtility() = {:.5}".format(game.min_utility()))
add_line("MaxUtility() = {:.5}".format(game.max_utility()))
try:
utility_sum = game.utility_sum()
except RuntimeError:
utility_sum = None
add_line("UtilitySum() = {}".format(utility_sum))
if infostate_observation and infostate_observation.tensor is not None:
add_line("InformationStateTensorShape() = {}".format(
format_shapes(infostate_observation.dict)))
add_line("InformationStateTensorLayout() = {}".format(
game.information_state_tensor_layout()))
add_line("InformationStateTensorSize() = {}".format(
len(infostate_observation.tensor)))
if default_observation and default_observation.tensor is not None:
add_line("ObservationTensorShape() = {}".format(
format_shapes(default_observation.dict)))
add_line("ObservationTensorLayout() = {}".format(
game.observation_tensor_layout()))
add_line("ObservationTensorSize() = {}".format(
len(default_observation.tensor)))
add_line("MaxGameLength() = {}".format(game.max_game_length()))
add_line('ToString() = "{}"'.format(str(game)))
players = list(range(game.num_players()))
# Arbitrarily pick the last possible initial states (for all games
# but multi-population MFGs, there will be a single initial state).
state = game.new_initial_states()[-1]
state_idx = 0
rng = np.random.RandomState(seed)
while True:
should_display = should_display_state_fn(state)
add_line("", force=True)
add_line("# State {}".format(state_idx), force=True)
for line in str(state).splitlines():
add_line("# {}".format(line).rstrip())
add_line("IsTerminal() = {}".format(state.is_terminal()))
add_line("History() = {}".format([int(a) for a in state.history()]))
add_line('HistoryString() = "{}"'.format(state.history_str()))
add_line("IsChanceNode() = {}".format(state.is_chance_node()))
add_line("IsSimultaneousNode() = {}".format(
state.is_simultaneous_node()))
add_line("CurrentPlayer() = {}".format(state.current_player()))
if infostate_observation:
for player in players:
s = infostate_observation.string_from(state, player)
if s is not None:
add_line(
f'InformationStateString({player}) = "{_escape(s)}"')
if infostate_observation and infostate_observation.tensor is not None:
for player in players:
infostate_observation.set_from(state, player)
for name, tensor in infostate_observation.dict.items():
label = f"InformationStateTensor({player})"
label += f".{name}" if name != "info_state" else ""
for line in _format_tensor(tensor, label):
add_line(line)
if default_observation:
for player in players:
s = default_observation.string_from(state, player)
if s is not None:
add_line(f'ObservationString({player}) = "{_escape(s)}"')
if public_observation:
s = public_observation.string_from(state, 0)
if s is not None:
add_line('PublicObservationString() = "{}"'.format(_escape(s)))
for player in players:
s = private_observation.string_from(state, player)
if s is not None:
add_line(
f'PrivateObservationString({player}) = "{_escape(s)}"')
if default_observation and default_observation.tensor is not None:
for player in players:
default_observation.set_from(state, player)
for name, tensor in default_observation.dict.items():
label = f"ObservationTensor({player})"
label += f".{name}" if name != "observation" else ""
for line in _format_tensor(tensor, label):
add_line(line)
if game_type.chance_mode == pyspiel.GameType.ChanceMode.SAMPLED_STOCHASTIC:
add_line('SerializeState() = "{}"'.format(
_escape(state.serialize())))
if not state.is_chance_node():
add_line("Rewards() = {}".format(state.rewards()))
add_line("Returns() = {}".format(state.returns()))
if state.is_terminal():
break
if state.is_chance_node():
add_line("ChanceOutcomes() = {}".format(state.chance_outcomes()))
if state.is_mean_field_node():
add_line("DistributionSupport() = {}".format(
state.distribution_support()))
num_states = len(state.distribution_support())
state.update_distribution([1. / num_states] *
num_states if num_states else [])
if state_idx < len(action_sequence):
assert action_sequence[state_idx] == "update_distribution", (
f"Unexpected action at MFG node: {action_sequence[state_idx]}, "
f"state: {state}, action_sequence: {action_sequence}")
add_line("")
add_line("# Set mean field distribution to be uniform", force=True)
add_line("action: update_distribution", force=True)
elif state.is_simultaneous_node():
for player in players:
add_line("LegalActions({}) = [{}]".format(
player,
", ".join(str(x) for x in state.legal_actions(player))))
for player in players:
add_line("StringLegalActions({}) = [{}]".format(
player,
", ".join('"{}"'.format(state.action_to_string(player, x))
for x in state.legal_actions(player))))
if state_idx < len(action_sequence):
actions = action_sequence[state_idx]
else:
actions = []
for pl in players:
legal_actions = state.legal_actions(pl)
actions.append(
0 if not legal_actions else rng.choice(legal_actions))
add_line("")
add_line("# Apply joint action [{}]".format(
format(", ".join(
'"{}"'.format(state.action_to_string(player, action))
for player, action in enumerate(actions)))),
force=True)
add_line("actions: [{}]".format(", ".join(
str(action) for action in actions)),
force=True)
state.apply_actions(actions)
else:
add_line("LegalActions() = [{}]".format(", ".join(
str(x) for x in state.legal_actions())))
add_line("StringLegalActions() = [{}]".format(
", ".join('"{}"'.format(
state.action_to_string(state.current_player(), x))
for x in state.legal_actions())))
if state_idx < len(action_sequence):
action = action_sequence[state_idx]
else:
action = rng.choice(state.legal_actions())
add_line("")
add_line('# Apply action "{}"'.format(
state.action_to_string(state.current_player(), action)),
force=True)
add_line("action: {}".format(action), force=True)
state.apply_action(action)
state_idx += 1
return lines
"""A bot that picks the first action from the list. Used only for tests."""
import base64
import sys
from open_spiel.python.observation import make_observation
import pyspiel
game_name = input()
play_as = int(input())
game = pyspiel.load_game(game_name)
public_observation = make_observation(
game,
pyspiel.IIGObservationType(
perfect_recall=False,
public_info=True,
private_info=pyspiel.PrivateInfoType.NONE))
private_observation = make_observation(
game,
pyspiel.IIGObservationType(
perfect_recall=False,
public_info=False,
private_info=pyspiel.PrivateInfoType.SINGLE_PLAYER))
print("ready")
while True:
print("start")
while True:
message = input()
if message == "tournament over":
print("tournament over")
Three formats of observation are supported:
a. 1-D numpy array, accessed by `observation.tensor`
b. Dict of numpy arrays, accessed by `observation.dict`. These are pieces of the
1-D array, reshaped. The np.array objects refer to the same memory as the
1-D array (no copying!).
c. String, hopefully human-readable (primarily for debugging purposes)
For usage examples, see `observation_test.py`.
"""
import numpy as np
import pyspiel
# Corresponds to the old information_state_XXX methods.
INFO_STATE_OBS_TYPE = pyspiel.IIGObservationType(perfect_recall=True)
class _Observation:
"""Contains an observation from a game."""
def __init__(self, game, imperfect_information_observation_type, params):
if imperfect_information_observation_type is not None:
obs = game.make_observer(imperfect_information_observation_type,
params)
else:
obs = game.make_observer(params)
self._observation = pyspiel._Observation(game, obs)
self.dict = {}
if self._observation.has_tensor():
self.tensor = np.frombuffer(self._observation, np.float32)
offset = 0
