def should_skip_env_spec_for_tests(spec):
# We skip tests for envs that require dependencies or are otherwise
# troublesome to run frequently
ep = spec._entry_point
# Skip mujoco tests for pull request CI
if skip_mujoco and (ep.startswith('gym.envs.mujoco') or ep.startswith('gym.envs.robotics:')):
return True
try:
import atari_py
except ImportError:
if ep.startswith('gym.envs.atari'):
return True
try:
import Box2D
except ImportError:
if ep.startswith('gym.envs.box2d'):
return True
if ( 'GoEnv' in ep or
'HexEnv' in ep or
(ep.startswith("gym.envs.atari") and not spec.id.startswith("Pong") and not spec.id.startswith("Seaquest"))
):
logger.warn("Skipping tests for env {}".format(ep))
return True
return False
def step(self, action):
assert self.action_space.contains(action), "%r (%s) invalid"%(action, type(action))
state = self.state
x, x_dot, theta, theta_dot = state
force = self.force_mag if action==1 else -self.force_mag
costheta = math.cos(theta)
sintheta = math.sin(theta)
temp = (force + self.polemass_length * theta_dot * theta_dot * sintheta) / self.total_mass
thetaacc = (self.gravity * sintheta - costheta* temp) / (self.length * (4.0/3.0 - self.masspole * costheta * costheta / self.total_mass))
xacc = temp - self.polemass_length * thetaacc * costheta / self.total_mass
x = x + self.tau * x_dot
x_dot = x_dot + self.tau * xacc
theta = theta + self.tau * theta_dot
theta_dot = theta_dot + self.tau * thetaacc
self.state = (x,x_dot,theta,theta_dot)
done = x < -self.x_threshold \
or x > self.x_threshold \
or theta < -self.theta_threshold_radians \
or theta > self.theta_threshold_radians
done = bool(done)
if not done:
reward = 1.0
elif self.steps_beyond_done is None:
# Pole just fell!
self.steps_beyond_done = 0
reward = 1.0
else:
if self.steps_beyond_done == 0:
logger.warn("You are calling 'step()' even though this environment has already returned done = True. You should always call 'reset()' once you receive 'done = True' -- any further steps are undefined behavior.")
self.steps_beyond_done += 1
reward = 0.0
return np.array(self.state), reward, done, {}
def step(self, action):
assert self.action_space.contains(action)
self.last_action = action
inp_act, out_act, pred = action
done = False
reward = 0.0
self.time += 1
assert 0 <= self.write_head_position
if out_act == 1:
try:
correct = pred == self.target[self.write_head_position]
except IndexError:
logger.warn("It looks like you're calling step() even though this "+
"environment has already returned done=True. You should always call "+
"reset() once you receive done=True. Any further steps are undefined "+
"behaviour.")
correct = False
if correct:
reward = 1.0
else:
# Bail as soon as a wrong character is written to the tape
reward = -0.5
done = True
self.write_head_position += 1
if self.write_head_position >= len(self.target):
done = True
self._move(inp_act)
if self.time > self.time_limit:
reward = -1.0
done = True
obs = self._get_obs()
self.last_reward = reward
self.episode_total_reward += reward
return (obs, reward, done, {})
def _start(self, directory, video_callable=None, force=False, resume=False,
write_upon_reset=False, uid=None, mode=None):
"""Start monitoring.
Args:
directory (str): A per-training run directory where to record stats.
video_callable (Optional[function, False]): function that takes in the index of the episode and outputs a boolean, indicating whether we should record a video on this episode. The default (for video_callable is None) is to take perfect cubes, capped at 1000. False disables video recording.
force (bool): Clear out existing training data from this directory (by deleting every file prefixed with "openaigym.").
resume (bool): Retain the training data already in this directory, which will be merged with our new data
write_upon_reset (bool): Write the manifest file on each reset. (This is currently a JSON file, so writing it is somewhat expensive.)
uid (Optional[str]): A unique id used as part of the suffix for the file. By default, uses os.getpid().
mode (['evaluation', 'training']): Whether this is an evaluation or training episode.
"""
if self.env.spec is None:
logger.warn("Trying to monitor an environment which has no 'spec' set. This usually means you did not create it via 'gym.make', and is recommended only for advanced users.")
env_id = '(unknown)'
else:
env_id = self.env.spec.id
if not os.path.exists(directory):
logger.info('Creating monitor directory %s', directory)
if six.PY3:
os.makedirs(directory, exist_ok=True)
else:
os.makedirs(directory)
if video_callable is None:
video_callable = capped_cubic_video_schedule
elif video_callable == False:
video_callable = disable_videos
elif not callable(video_callable):
raise error.Error('You must provide a function, None, or False for video_callable, not {}: {}'.format(type(video_callable), video_callable))
self.video_callable = video_callable
# Check on whether we need to clear anything
if force:
clear_monitor_files(directory)
elif not resume:
training_manifests = detect_training_manifests(directory)
if len(training_manifests) > 0:
raise error.Error('''Trying to write to monitor directory {} with existing monitor files: {}.
You should use a unique directory for each training run, or use 'force=True' to automatically clear previous monitor files.'''.format(directory, ', '.join(training_manifests[:5])))
self._monitor_id = monitor_closer.register(self)
self.enabled = True
self.directory = os.path.abspath(directory)
# We use the 'openai-gym' prefix to determine if a file is
# ours
self.file_prefix = FILE_PREFIX
self.file_infix = '{}.{}'.format(self._monitor_id, uid if uid else os.getpid())
self.stats_recorder = stats_recorder.StatsRecorder(directory, '{}.episode_batch.{}'.format(self.file_prefix, self.file_infix), autoreset=self.env_semantics_autoreset, env_id=env_id)
if not os.path.exists(directory): os.mkdir(directory)
self.write_upon_reset = write_upon_reset
if mode is not None:
self._set_mode(mode)
def _encode_image_frame(self, frame):
if not self.encoder:
self.encoder = ImageEncoder(self.path, frame.shape, self.frames_per_sec)
self.metadata['encoder_version'] = self.encoder.version_info
try:
self.encoder.capture_frame(frame)
except error.InvalidFrame as e:
logger.warn('Tried to pass invalid video frame, marking as broken: %s', e)
self.broken = True
else:
self.empty = False
def should_skip_env_spec_for_tests(spec):
# We skip tests for envs that require dependencies or are otherwise
# troublesome to run frequently
ep = spec._entry_point
# Skip mujoco tests for pull request CI
skip_mujoco = not (os.environ.get('MUJOCO_KEY_BUNDLE') or os.path.exists(os.path.expanduser('~/.mujoco')))
if skip_mujoco and ep.startswith('gym.envs.mujoco:'):
return True
if ( 'GoEnv' in ep or
'HexEnv' in ep or
(ep.startswith("gym.envs.atari") and not spec.id.startswith("Pong") and not spec.id.startswith("Seaquest"))
):
logger.warn("Skipping tests for env {}".format(ep))
return True
return False
def seed(self, seed=None):
"""Sets the seed for this env's random number generator(s).
Note:
Some environments use multiple pseudorandom number generators.
We want to capture all such seeds used in order to ensure that
there aren't accidental correlations between multiple generators.
Returns:
list<bigint>: Returns the list of seeds used in this env's random
number generators. The first value in the list should be the
"main" seed, or the value which a reproducer should pass to
'seed'. Often, the main seed equals the provided 'seed', but
this won't be true if seed=None, for example.
"""
logger.warn("Could not seed environment %s", self)
return
def patch_deprecated_methods(env):
"""
Methods renamed from '_method' to 'method', render() no longer has 'close' parameter, close is a separate method.
For backward compatibility, this makes it possible to work with unmodified environments.
"""
global warn_once
if warn_once:
logger.warn("Environment '%s' has deprecated methods '_step' and '_reset' rather than 'step' and 'reset'. Compatibility code invoked. Set _gym_disable_underscore_compat = True to disable this behavior." % str(type(env)))
warn_once = False
env.reset = env._reset
env.step = env._step
env.seed = env._seed
def render(mode):
return env._render(mode, close=False)
def close():
env._render("human", close=True)
env.render = render
env.close = close
def __init__(self, low=None, high=None, shape=None, dtype=np.float32):
"""
Two kinds of valid input:
Box(low=-1.0, high=1.0, shape=(3,4)) # low and high are scalars, and shape is provided
Box(np.array(low=[-1.0,-2.0]), high=np.array([2.0,4.0])) # low and high are arrays of the same shape
"""
if shape is None:
assert low.shape == high.shape
shape = low.shape
else:
assert np.isscalar(low) and np.isscalar(high)
low = low + np.zeros(shape)
high = high + np.zeros(shape)
self.low = low.astype(dtype)
self.high = high.astype(dtype)
if (self.high == 255).all() and dtype != np.uint8:
logger.warn('Box constructor got high=255 but dtype!=uint8')
Space.__init__(self, shape, dtype)
def step(self, action):
if self.curr_episode > self.episodes:
logger.warn(
"You are calling 'step()' even though this environment has already returned done = True. You should always call 'initialize()' and 'reset()' once you receive 'done = True'"
)
return
action = np.array(action)
if action.shape != (self.numAgents, 2):
logger.error(
"Incorrect dimenions of action. Action must have destination position for each agent"
)
return
self.curr_episode += 1
reward = np.zeros(self.numAgents)
self.agentPosIncrements = np.array([(-1000.0, -1000.0)] *
self.numAgents)
agentReachedDest = [False] * self.numAgents
for _ in xrange(self.updateRate):
self.curr_step += 1
#Move targets
for i in xrange(self.numTargets):
self.moveTarget(i)
#Move agent
for i in xrange(self.numAgents):
if not agentReachedDest[i]:
agentReachedDest[i] = self.moveAgent(i, action[i])
else: #Already reached. Removes precision errors
self.agentLocations[i] = action[i].astype('float32')
#Calculate reward at this step
reward += self.calculateAgentRewards()[0]
if self.viewer is not None:
self.render()
return self.reset(), reward, self.curr_episode >= self.episodes, {}
def close_extras(self, timeout=None, terminate=False):
"""
Parameters
----------
timeout : int or float, optional
Number of seconds before the call to `close` times out. If `None`,
the call to `close` never times out. If the call to `close` times
out, then all processes are terminated.
terminate : bool (default: `False`)
If `True`, then the `close` operation is forced and all processes
are terminated.
"""
timeout = 0 if terminate else timeout
try:
if self._state != AsyncState.DEFAULT:
logger.warn('Calling `close` while waiting for a pending '
'call to `{0}` to complete.'.format(
self._state.value))
function = getattr(self, '{0}_wait'.format(self._state.value))
function(timeout)
except mp.TimeoutError:
terminate = True
if terminate:
for process in self.processes:
if process.is_alive():
process.terminate()
else:
for pipe in self.parent_pipes:
if (pipe is not None) and (not pipe.closed):
pipe.send(('close', None))
for pipe in self.parent_pipes:
if (pipe is not None) and (not pipe.closed):
pipe.recv()
for pipe in self.parent_pipes:
if pipe is not None:
pipe.close()
for process in self.processes:
process.join()
def step(self, action):
"""
implementation of the classic “agent-environment loop”.
Args:
action (object) : the board
Returns:
observation (object):
reward (float)
done (boolean)
info (dict)
"""
#assert self.action_space.contains(action), f"{action} ({type(action)})"
reward = 0
info = {
'turn': self.game.turns_count,
'move_type': None,
'player': self.game.current_player,
'player_name': ['white', 'black'][self.game.current_player]
}
if self.done:
logger.warn(
"You are calling 'step()' even though this environment has already returned done = True."
"You should always call 'reset()' once you receive 'done = True'"
"-- any further steps are undefined behavior.")
else:
pos0, pos1 = action
move_check = self.game.action_handler(pos0,
pos1,
return_modif=True)
if move_check: # if the move is a valid move
move_type, self._modifications = move_check
reward = Reward.method_1(self.game.board, move_type)
# for debug
info['move_type'] = move_type
return self.observation, reward, self.done, info
def step(self, a):
"""
@brief Run a simulation step for a given.
@param[in] a The action to perform (in the action space rather than
the original torque space).
@return The next observation, the reward, the status of the simulation
(done or not), and a dictionary of extra information
"""
if self.continuous:
torque = a
else:
torque = self.AVAIL_TORQUE[a] * self.torque_mag
# Add noise to the force action
if self.torque_noise_max > 0:
torque += self.np_random.uniform(-self.torque_noise_max, self.torque_noise_max)
# Bypass 'self.engine_py.step' method and use direct assignment to max out the performances
self.engine_py._action[0] = torque
self.engine_py.step(dt_desired=self.dt)
self.state = self.engine_py.state
# Get information
info, obs = self._get_info()
done = info['is_success']
# Make sure the simulation is not already over
if done:
if self.steps_beyond_done is None:
self.steps_beyond_done = 0
else:
if self.steps_beyond_done == 0:
logger.warn("You are calling 'step()' even though this environment has already returned done = True. You should always call 'reset()' once you receive 'done = True' -- any further steps are undefined behavior.")
self.steps_beyond_done += 1
# Compute the reward
reward = self.compute_reward(obs['achieved_goal'], self.goal, info)
return obs, reward, done, info
def step(self, action):
thrust = action[0] # Thrust command
w = action[1] # Angular velocity command
state = self.state
ref_pos = self.ref_pos
ref_vel = self.ref_vel
pos = np.array([state[0], state[1]]).flatten()
att = np.array([state[2]]).flatten()
vel = np.array([state[3], state[4]]).flatten()
acc = thrust / self.mass * np.array(
[cos(att + pi / 2), sin(att + pi / 2)]) + self.g
pos = pos + vel * self.dt + 0.5 * acc * self.dt * self.dt
vel = vel + acc * self.dt
att = att + w * self.dt
self.state = (pos[0], pos[1], att, vel[0], vel[1])
done = linalg.norm(pos, 2) < -self.pos_threshold \
or linalg.norm(pos, 2) > self.pos_threshold \
or linalg.norm(vel, 2) < -self.vel_threshold \
or linalg.norm(vel, 2) > self.vel_threshold
done = bool(done)
if not done:
reward = (-linalg.norm(pos, 2))
elif self.steps_beyond_done is None:
# Pole just fell!
self.steps_beyond_done = 0
reward = 1.0
else:
if self.steps_beyond_done == 0:
logger.warn(
"You are calling 'step()' even though this environment has already returned done = True. You should always call 'reset()' once you receive 'done = True' -- any further steps are undefined behavior."
)
self.steps_beyond_done += 1
reward = 0.0
return np.array(self.state), reward, done, {}
def step(self, action):
assert self.action_space.contains(
action), "%r (%s) invalid" % (action, type(action))
state = self.state
x, x_dot, theta, theta_dot = state
force = self.force_mag if action == 1 else -self.force_mag
costheta = math.cos(theta)
sintheta = math.sin(theta)
temp = (force + self.polemass_length * theta_dot * theta_dot *
sintheta) / self.total_mass
thetaacc = (self.gravity * sintheta - costheta * temp) / (
self.length *
(4.0 / 3.0 -
self.masspole * costheta * costheta / self.total_mass))
xacc = temp - self.polemass_length * thetaacc * costheta / self.total_mass
x = x + self.tau * x_dot
x_dot = x_dot + self.tau * xacc
theta = theta + self.tau * theta_dot
theta_dot = theta_dot + self.tau * thetaacc
self.state = (x, x_dot, theta, theta_dot)
done = x < -self.x_threshold \
or x > self.x_threshold \
or theta < -self.theta_threshold_radians \
or theta > self.theta_threshold_radians
done = bool(done)
if not done:
reward = 1.0
elif self.steps_beyond_done is None:
# Pole just fell!
self.steps_beyond_done = 0
reward = 1.0
else:
if self.steps_beyond_done == 0:
logger.warn(
"You are calling 'step()' even though this environment has already returned done = True. You should always call 'reset()' once you receive 'done = True' -- any further steps are undefined behavior."
)
self.steps_beyond_done += 1
reward = 0.0
return np.array(self.state), reward, done, {}
def step(self, action):
assert self.action_space.contains(action), "%r (%s) invalid"%(action, type(action))
#state = np.array(self.state).reshape(4, 4)
goal_pos = list(zip(*np.where(self.state == 1)))[0]
agent_pos = list(zip(*np.where(self.state == 3)))[0]
#move
new_agent_pos = np.array(agent_pos)
if action==0:
new_agent_pos[1]-=1
elif action==1:
new_agent_pos[1]+=1
elif action==2:
new_agent_pos[0]-=1
elif action==3:
new_agent_pos[0]-=1
new_agent_pos = np.clip(new_agent_pos, 0, 3)
self.state[agent_pos[0], agent_pos[1]] = 0 #moved from this position so it is empty
self.state[new_agent_pos[0], new_agent_pos[1]] = 3 #moved to this position
#self.state = tuple(self.state.flatten())
#check if done
done=False
if goal_pos==list(new_agent_pos):
done=True
#assign reward
if not done:
reward = 0
elif self.steps_beyond_done is None:
# Just arrived at the goal
self.steps_beyond_done = 0
reward = 1
else:
if self.steps_beyond_done == 0:
logger.warn("You are calling 'step()' even though this environment has already returned done = True. You should always call 'reset()' once you receive 'done = True' -- any further steps are undefined behavior.")
self.steps_beyond_done += 1
reward = 0.0
return self.state, reward, done, {}
def step(self, action):
"""
@brief Run a simulation step for a given action.
@param[in] action The action to perform in the action space
Set to None to NOT update the action.
@return The next observation, the reward, the status of the episode
(done or not), and a dictionary of extra information
"""
# Bypass 'self.engine_py.action' setter and use
# direct assignment to max out the performances
if action is None:
action = self.action_prev
self.engine_py._action[:] = action
self.engine_py.step(dt_desired=self.dt)
self.is_running = True
self.action_prev = action
# Extract information about the current simulation state
self._update_observation(self.observation)
done = self._is_done()
self.learning_info = {'is_success': done}
reward = self._compute_reward()
# Make sure the simulation is not already over
if done:
if self._steps_beyond_done is None:
self._steps_beyond_done = 0
else:
if self._steps_beyond_done == 0:
logger.warn(
"You are calling 'step()' even though this environment has already \
returned done = True. You should always call 'reset()' once you \
receive 'done = True' -- any further steps are undefined behavior."
)
self._steps_beyond_done += 1
return self.observation, reward, done, self.learning_info
def _step(self, action):
assert self.action_space.contains(
action), "%r (%s) invalid" % (action, type(action))
state = self.state
reward = 0.0
if state == 0:
if action == 0:
if self.np_random.rand() < self.signal_prob:
state = self.n_press
else:
reward = -1.0
else:
if action == 1:
# reducing state to 0
state -= 1
if state == 0:
# this transition is rewarded
reward = self.reward_seq_complete
else:
# if not pressing, then move directly to 0
state = 0
signal = [float(state == self.n_press)]
self.state = state
done = False
done = bool(done)
if not done:
pass
elif self.steps_beyond_done is None:
# Pole just fell!
self.steps_beyond_done = 0
else:
if self.steps_beyond_done == 0:
logger.warn(
"You are calling 'step()' even though this environment has already returned done = True. You should always call 'reset()' once you receive 'done = True' -- any further steps are undefined behavior."
)
self.steps_beyond_done += 1
return np.array(signal), reward, done, {}
def step(self, action):
self._take_action(action)
traci.simulationStep()
self.current_step += 1
obs = self._next_observation()
reward = self._get_reward()
if self.is_done:
logger.warn(
"You are calling 'step()' even though this environment has already returned done = True. "
"You should always call 'reset()' once you receive 'done = True' "
"-- any further steps are undefined behavior.")
reward = 0.0
if self.current_step + 1 == self.steps_per_episode:
self.is_done = True
return obs, reward, self.is_done, {}
def render(self, mode='matplotlib'):
"""Renders this environment in its current state.
Note that, in order to support rendering,
`render=True` must be passed to the environment
constructor.
Arguments:
mode(str) Rendering mode. Currently, only
`"matplotlib"` is supported.
"""
if mode == 'matplotlib' and self._render:
self._painter.draw()
elif not self._render:
logger.warn(
'Need to pass `render=True` to support '
'rendering.')
else:
logger.warn(
'Invalid rendering mode "%s". '
'Only "matplotlib" is supported.')
def test_env_semantics(spec):
logger.warn("Skipping this test. Existing hashes were generated in a bad way")
return
with open(ROLLOUT_FILE) as data_file:
rollout_dict = json.load(data_file)
if spec.id not in rollout_dict:
if not spec.nondeterministic:
logger.warn("Rollout does not exist for {}, run generate_json.py to generate rollouts for new envs".format(spec.id))
return
logger.info("Testing rollout for {} environment...".format(spec.id))
observations_now, actions_now, rewards_now, dones_now = generate_rollout_hash(spec)
errors = []
if rollout_dict[spec.id]['observations'] != observations_now:
errors.append('Observations not equal for {} -- expected {} but got {}'.format(spec.id, rollout_dict[spec.id]['observations'], observations_now))
if rollout_dict[spec.id]['actions'] != actions_now:
errors.append('Actions not equal for {} -- expected {} but got {}'.format(spec.id, rollout_dict[spec.id]['actions'], actions_now))
if rollout_dict[spec.id]['rewards'] != rewards_now:
errors.append('Rewards not equal for {} -- expected {} but got {}'.format(spec.id, rollout_dict[spec.id]['rewards'], rewards_now))
if rollout_dict[spec.id]['dones'] != dones_now:
errors.append('Dones not equal for {} -- expected {} but got {}'.format(spec.id, rollout_dict[spec.id]['dones'], dones_now))
if len(errors):
for error in errors:
logger.warn(error)
raise ValueError(errors)
def _check_spec_register(spec: EnvSpec):
"""Checks whether the spec is valid to be registered. Helper function for `register`."""
global registry, current_namespace
if current_namespace is not None:
if spec.namespace is not None:
logger.warn(
f"Custom namespace `{spec.namespace}` is being overridden "
f"by namespace `{current_namespace}`. If you are developing a "
"plugin you shouldn't specify a namespace in `register` "
"calls. The namespace is specified through the "
"entry point package metadata.")
latest_versioned_spec = max(
(spec_
for spec_ in registry.values() if spec_.namespace == spec.namespace
and spec_.name == spec.name and spec_.version is not None),
key=lambda spec_: int(spec_.version), # type: ignore
default=None,
)
unversioned_spec = next(
(spec_
for spec_ in registry.values() if spec_.namespace == spec.namespace
and spec_.name == spec.name and spec_.version is None),
None,
)
if unversioned_spec is not None and spec.version is not None:
raise error.RegistrationError(
"Can't register the versioned environment "
f"`{spec.id}` when the unversioned environment "
f"`{unversioned_spec.id}` of the same name already exists.")
elif latest_versioned_spec is not None and spec.version is None:
raise error.RegistrationError(
"Can't register the unversioned environment "
f"`{spec.id}` when the versioned environment "
f"`{latest_versioned_spec.id}` of the same name "
f"already exists. Note: the default behavior is "
f"that `gym.make` with the unversioned environment "
f"will return the latest versioned environment")
def _check_nan(env: gym.Env, check_inf: bool = True) -> None:
"""Check for NaN and Inf."""
for _ in range(10):
action = env.action_space.sample()
observation, reward, _, _ = env.step(action)
if np.any(np.isnan(observation)):
logger.warn("Encountered NaN value in observations.")
if np.any(np.isnan(reward)):
logger.warn("Encountered NaN value in rewards.")
if check_inf and np.any(np.isinf(observation)):
logger.warn("Encountered inf value in observations.")
if check_inf and np.any(np.isinf(reward)):
logger.warn("Encountered inf value in rewards.")
def load_env_plugins(entry_point: str = "gym.envs") -> None:
# Load third-party environments
for plugin in metadata.entry_points(group=entry_point):
# Python 3.8 doesn't support plugin.module, plugin.attr
# So we'll have to try and parse this ourselves
try:
module, attr = plugin.module, plugin.attr # type: ignore ## error: Cannot access member "attr" for type "EntryPoint"
except AttributeError:
if ":" in plugin.value:
module, attr = plugin.value.split(":", maxsplit=1)
else:
module, attr = plugin.value, None
except:
module, attr = None, None
finally:
if attr is None:
raise error.Error(
f"Gym environment plugin `{module}` must specify a function to execute, not a root module"
)
context = namespace(plugin.name)
if plugin.name.startswith("__") and plugin.name.endswith("__"):
# `__internal__` is an artifact of the plugin system when
# the root namespace had an allow-list. The allow-list is now
# removed and plugins can register environments in the root
# namespace with the `__root__` magic key.
if plugin.name == "__root__" or plugin.name == "__internal__":
context = contextlib.nullcontext()
else:
logger.warn(
f"The environment namespace magic key `{plugin.name}` is unsupported. "
"To register an environment at the root namespace you should specify "
"the `__root__` namespace.")
with context:
fn = plugin.load()
try:
fn()
except Exception as e:
logger.warn(str(e))
def step(self, action):
assert self.action_space.contains(action), "%r (%s) invalid"%(action, type(action))
state = self.state
# Create a prey with probability 1%
if not self.prey.tolist():
px = np.float(random.randint(-.5*self.world_width, .5*self.world_width - 1))
py = np.float(random.randint(-.5*self.world_height, .5*self.world_height - 1))
while [px, py] in self.snake.blocks.tolist():
px = np.float(random.randint(-.5*self.world_width, .5*self.world_width - 1))
py = np.float(random.randint(-.5*self.world_height, .5*self.world_height - 1))
self.prey = np.array([px, py])
logger.info("[INFO] -- New Prey at {}, {} ".format(px,py))
# print(self.snake.blocks[0].tolist())
if self.snake.blocks[0].tolist() in [self.prey.tolist()]:
self.snake.eat_and_move(action)
self.state = np.array([self.get_state()])
self.prey = np.array([])
logger.info("[INFO] -- Manger")
reward = 500.
else:
self.snake.move(action)
reward = -.5
self.state = np.array([self.get_state()])
done = self.snake.is_dead or self.oob(*self.snake.blocks[0])
if done:
logger.warn("DONE")
if self.steps_beyond_done is None:
self.steps_beyond_done = 0
reward = -1000
else:
if self.steps_beyond_done == 0:
logger.warn("You are calling 'step()' but it's already done !")
self.steps_beyond_done += 1
return self.state, reward, done, {}
def step(self, action):
assert self.action_space.contains(
action), "%r (%s) invalid" % (action, type(action))
state = self.state
# TODO: rename...It's not really delta.
action_0 = action[0]
next_state = np.copy(state)
if action_0 != 0:
next_state[0] = action_0
else:
# The last action_input is do nothing.
pass
# After intervention, the state evolves into the next following the transition prob.
next_state[0] = (next_state[0] + 1) % 10
# next_second_digit = next_first_digit % 2
next_state[1] = (next_state[1] + 1) % 2
assert self._observed_state_space.contains(
next_state), 'internal error. Illegal next state'
self.state = next_state
self.step_count += 1
if self.step_count >= self.max_num_steps:
if self.steps_beyond_done is None:
self.steps_beyond_done = 0
else:
if self.steps_beyond_done == 0:
logger.warn(
'You are calling \'step()\' even though this environment has already returned done = True. You should '
'always call \'reset()\' once you receive \'done = True\' -- any further steps are undefined behavior.'
)
self.steps_beyond_done += 1
done = self._get_is_done()
info = {'done': done, 'steps_beyond_done': self.steps_beyond_done}
reward = self.compute_reward(self._get_achieved_goal(),
self._get_desired_goal(), done)
return self._get_observation(), reward, done, info
def step(self, action):
#TODO: assert action is a scalar
# assert self.action_space.contains(action), "%r (%s) invalid"%(action, type(action))
# get state
x, th, x_dot, th_dot = self.state
theta = self._unwrap_angle(th)
# clip torque, update dynamics
u = np.clip(action, -self.force_mag, self.force_mag)
acc = self._accels(anp.array([x, th, x_dot, th_dot, u]))
# integrate
xacc, thacc = acc[0], acc[1]
x_dot = x_dot + self.tau * xacc
x = x + self.tau * x_dot
th_dot = th_dot + self.tau * thacc
th = th + self.tau * th_dot + 0.5 * self.tau**2 * thacc
# update state
self._unwrap_angle(th)
self.state = np.array([x, th, x_dot, th_dot])
done = self.is_done()
if not done:
reward = 1.0
elif self.steps_beyond_done is None:
# Pole just fell!
self.steps_beyond_done = 0
reward = 1.0
else:
if self.steps_beyond_done == 0:
logger.warn(
"You are calling 'step()' even though this environment has already returned done = True. You should always call 'reset()' once you receive 'done = True' -- any further steps are undefined behavior."
)
self.steps_beyond_done += 1
reward = 0.0
return self.state, reward, done, {}
def test_env_semantics(spec):
logger.warn("Skipping this test. Existing hashes were generated in a bad way")
return
with open(ROLLOUT_FILE) as data_file:
rollout_dict = json.load(data_file)
if spec.id not in rollout_dict:
if not spec.nondeterministic:
logger.warn("Rollout does not exist for {}, run generate_json.py to generate rollouts for new envs".format(spec.id))
return
logger.info("Testing rollout for {} environment...".format(spec.id))
observations_now, actions_now, rewards_now, dones_now = generate_rollout_hash(spec)
errors = []
if rollout_dict[spec.id]['observations'] != observations_now:
errors.append('Observations not equal for {} -- expected {} but got {}'.format(spec.id, rollout_dict[spec.id]['observations'], observations_now))
if rollout_dict[spec.id]['actions'] != actions_now:
errors.append('Actions not equal for {} -- expected {} but got {}'.format(spec.id, rollout_dict[spec.id]['actions'], actions_now))
if rollout_dict[spec.id]['rewards'] != rewards_now:
errors.append('Rewards not equal for {} -- expected {} but got {}'.format(spec.id, rollout_dict[spec.id]['rewards'], rewards_now))
if rollout_dict[spec.id]['dones'] != dones_now:
errors.append('Dones not equal for {} -- expected {} but got {}'.format(spec.id, rollout_dict[spec.id]['dones'], dones_now))
if len(errors):
for error in errors:
logger.warn(error)
raise ValueError(errors)
def _step(self, action):
assert self.action_space.contains(
action), "%r (%s) invalid" % (action, type(action))
state = self.state
reward = 0.0
if action == 0:
# poke
if state <= 0:
# reward and reset state
reward = self.reward_seq_complete
state = self.n_press
elif action == 1:
# press
state -= 1
state = max(0, state)
else:
raise ValueError
self.state = state
done = False
if not done:
pass
elif self.steps_beyond_done is None:
# Pole just fell!
self.steps_beyond_done = 0
else:
if self.steps_beyond_done == 0:
logger.warn(
"You are calling 'step()' even though this environment has already returned done = True. You should always call 'reset()' once you receive 'done = True' -- any further steps are undefined behavior."
)
self.steps_beyond_done += 1
if self.observe_state:
obs = np.array([self.state])
else:
obs = np.array([1.])
return obs, reward, done, {}
def capture_frame(self):
"""Render the given `env` and add the resulting frame to the video."""
if not self.functional: return
logger.debug('Capturing video frame: path=%s', self.path)
render_mode = 'ansi' if self.ansi_mode else 'rgb_array'
frame = self.env.render(mode=render_mode)
if frame is None:
if self._async:
return
else:
# Indicates a bug in the environment: don't want to raise
# an error here.
logger.warn('Env returned None on render(). Disabling further rendering for video recorder by marking as disabled: path=%s metadata_path=%s', self.path, self.metadata_path)
self.broken = True
else:
self.last_frame = frame
if self.ansi_mode:
self._encode_ansi_frame(frame)
else:
self._encode_image_frame(frame)
def step(self, action):
state = self.state
x, x_dot, theta, theta_dot = state
force = self.force_mag * action
costheta = math.cos(theta)
sintheta = math.sin(theta)
temp = (force + self.polemass_length * theta_dot * theta_dot * sintheta) / self.total_mass
thetaacc = (self.gravity * sintheta - costheta* temp) / (self.length * (4.0/3.0 - self.masspole * costheta * costheta / self.total_mass))
xacc = temp - self.polemass_length * thetaacc * costheta / self.total_mass
if self.kinematics_integrator == 'euler':
x = x + self.tau * x_dot
x_dot = x_dot + self.tau * xacc
theta = theta + self.tau * theta_dot
theta_dot = theta_dot + self.tau * thetaacc
else: # semi-implicit euler
x_dot = x_dot + self.tau * xacc
x = x + self.tau * x_dot
theta_dot = theta_dot + self.tau * thetaacc
theta = theta + self.tau * theta_dot
self.state = (x,x_dot,theta,theta_dot)
done = x < -self.x_threshold \
or x > self.x_threshold \
or theta < -self.theta_threshold_radians \
or theta > self.theta_threshold_radians
done = bool(done)
if not done:
reward = 1.0
elif self.steps_beyond_done is None:
# Pole just fell!
self.steps_beyond_done = 0
reward = 1.0
else:
if self.steps_beyond_done == 0:
logger.warn("You are calling 'step()' even though this environment has already returned done = True. You should always call 'reset()' once you receive 'done = True' -- any further steps are undefined behavior.")
self.steps_beyond_done += 1
reward = 0.0
return np.array(self.state), reward, done, {}
def __init__(self, low=None, high=None, shape=None, dtype=None):
"""
Two kinds of valid input:
Box(low=-1.0, high=1.0, shape=(3,4)) # low and high are scalars, and shape is provided
Box(low=np.array([-1.0,-2.0]), high=np.array([2.0,4.0])) # low and high are arrays of the same shape
"""
if shape is None:
assert low.shape == high.shape
shape = low.shape
else:
assert np.isscalar(low) and np.isscalar(high)
low = low + np.zeros(shape)
high = high + np.zeros(shape)
if dtype is None: # Autodetect type
if (high == 255).all():
dtype = np.uint8
else:
dtype = np.float32
logger.warn("gym.spaces.Box autodetected dtype as %s. Please provide explicit dtype." % dtype)
self.low = low.astype(dtype)
self.high = high.astype(dtype)
gym.Space.__init__(self, shape, dtype)
def step(self, action):
assert self.action_space.contains(action), "%r (%s) invalid"%(action, type(action))
state = self.state
x, x_dot, theta, theta_dot = state
force = self.force_mag if action==1 else -self.force_mag
costheta = math.cos(theta)
sintheta = math.sin(theta)
temp = (force + self.polemass_length * theta_dot * theta_dot * sintheta) / self.total_mass
thetaacc = (self.gravity * sintheta - costheta* temp) / (self.length * (4.0/3.0 - self.masspole * costheta * costheta / self.total_mass))
xacc = temp - self.polemass_length * thetaacc * costheta / self.total_mass
if self.kinematics_integrator == 'euler':
x = x + self.tau * x_dot
x_dot = x_dot + self.tau * xacc
theta = theta + self.tau * theta_dot
theta_dot = theta_dot + self.tau * thetaacc
else: # semi-implicit euler
x_dot = x_dot + self.tau * xacc
x = x + self.tau * x_dot
theta_dot = theta_dot + self.tau * thetaacc
theta = theta + self.tau * theta_dot
self.state = (x,x_dot,theta,theta_dot)
done = x < -self.x_threshold \
or x > self.x_threshold
done = bool(done)
distance_from_desired_angle = (theta - self.desired_angle) / self.flexibility
if not done:
reward = math.exp(-distance_from_desired_angle*distance_from_desired_angle/2)
elif self.steps_beyond_done is None:
# Pole just fell!
self.steps_beyond_done = 0
reward = math.exp(-distance_from_desired_angle*distance_from_desired_angle/2)
else:
if self.steps_beyond_done == 0:
logger.warn("You are calling 'step()' even though this environment has already returned done = True. You should always call 'reset()' once you receive 'done = True' -- any further steps are undefined behavior.")
self.steps_beyond_done += 1
reward = 0.0
return np.array(self.state), reward, done, {}
def __init__(self, low=None, high=None, shape=None, dtype=None):
"""
Two kinds of valid input:
Box(low=-1.0, high=1.0, shape=(3,4)) # low and high are scalars, and shape is provided
Box(low=np.array([-1.0,-2.0]), high=np.array([2.0,4.0])) # low and high are arrays of the same shape
"""
if shape is None:
assert low.shape == high.shape
shape = low.shape
else:
assert np.isscalar(low) and np.isscalar(high)
low = low + np.zeros(shape)
high = high + np.zeros(shape)
if dtype is None: # Autodetect type
if (high == 255).all():
dtype = np.uint8
else:
dtype = np.float32
logger.warn("gym.spaces.Box autodetected dtype as %s. Please provide explicit dtype." % dtype)
self.low = low.astype(dtype)
self.high = high.astype(dtype)
gym.Space.__init__(self, shape, dtype)
def step(self, action):
assert self.action_space.contains(
action), "%r (%s) invalid" % (action, type(action))
self.cityflow.set_tl_phase(self.intersection_id, action)
self.cityflow.next_step()
state = self._get_state()
reward = self._get_reward()
self.current_step += 1
if self.is_done:
logger.warn(
"You are calling 'step()' even though this environment has already returned done = True. "
"You should always call 'reset()' once you receive 'done = True' "
"-- any further steps are undefined behavior.")
reward = 0.0
if self.current_step + 1 == self.steps_per_episode:
self.is_done = True
return state, reward, self.is_done, {}
def _check_render(
env: gym.Env, warn: bool = True, headless: bool = False
) -> None: # pragma: no cover
"""
Check the declared render modes/fps and the `render()`/`close()`
method of the environment.
:param env: The environment to check
:param warn: Whether to output additional warnings
:param headless: Whether to disable render modes
that require a graphical interface. False by default.
"""
render_modes = env.metadata.get("render_modes")
if render_modes is None:
if warn:
logger.warn(
"No render modes was declared in the environment "
" (env.metadata['render_modes'] is None or not defined), "
"you may have trouble when calling `.render()`"
)
render_fps = env.metadata.get("render_fps")
# We only require `render_fps` if rendering is actually implemented
if render_fps is None and render_modes is not None and len(render_modes) > 0:
if warn:
logger.warn(
"No render fps was declared in the environment "
" (env.metadata['render_fps'] is None or not defined), "
"rendering may occur at inconsistent fps"
)
else:
# Don't check render mode that require a
# graphical interface (useful for CI)
if headless and "human" in render_modes:
render_modes.remove("human")
# Check all declared render modes
for render_mode in render_modes:
env.render(mode=render_mode)
env.close()
def capture_frame(self):
"""Render the given `env` and add the resulting frame to the video."""
if not self.functional: return
logger.debug('Capturing video frame: path=%s', self.path)
render_mode = 'ansi' if self.ansi_mode else 'rgb_array'
frame = self.env.render(mode=render_mode)
if frame is None:
if self._async:
return
else:
# Indicates a bug in the environment: don't want to raise
# an error here.
logger.warn('Env returned None on render(). Disabling further rendering for video recorder by marking as disabled: path=%s metadata_path=%s', self.path, self.metadata_path)
self.broken = True
else:
self.last_frame = frame
if self.ansi_mode:
self._encode_ansi_frame(frame)
else:
self._encode_image_frame(frame)
def step(self, action):
if action <= -10.0 and action >= 10.0: raise Exception
reward = self.reward(self.state, action)
if action != 0.0:
self.steps_without_correct_action += 1.0
done = self.steps_without_correct_action >= 20
if done:
if self.steps_beyond_done is None:
self.steps_beyond_done = 0
elif self.steps_beyond_done == 0:
logger.warn(
"You are calling 'step()' even though this "
"environment has already returned done = True. You "
"should always call 'reset()' once you receive 'done = "
"True' -- any further steps are undefined behavior.")
self.steps_beyond_done += 1
return np.array(self.state), reward, done, {}
def step(self, action):
action = np.clip(action, self.action_space.low, self.action_space.high)
ds = action[0]
dtheta = action[1]
x, y, theta = self.state
# update theta and keep normalised to [0, 2pi] range
theta = (theta + dtheta) % (2 * math.pi)
# update position
x = x + math.cos(theta) * ds
y = y + math.sin(theta) * ds
wall_collision = self.is_colliding(x, y, 1)
if not wall_collision:
self.state[0] = x
self.state[1] = y
self.state[2] = theta
done = self.is_colliding(self.state[0], self.state[1], 'r')
reward = -0.1
if done and self.steps_beyond_done is None:
# solved the maze!
reward += 100.0
self.steps_beyond_done = 0
elif self.steps_beyond_done is not None:
if self.steps_beyond_done == 0:
logger.warn(
"You are calling 'step()' even though this "
"environment has already returned done = True. You "
"should always call 'reset()' once you receive 'done = "
"True' -- any further steps are undefined behavior.")
self.steps_beyond_done += 1
return self.normalised_state(), reward, done, {}
def step(self, action):
if not self.done:
# MDP Transition
new_grid, new_context = self.coordinator(self.grid, action,
self.context)
# New State
self.grid = new_grid
self.context = new_context
# Termination as a function of New State
self._is_done()
# API Formatting
# Necessary condition for MDP, its New State is public
obs = new_grid, new_context
# Reward as a function of New State
reward = self._award()
info = self._report()
return obs, reward, self.done, info
else:
if self.steps_beyond_done == 0:
logger.warn(
"You are calling 'step()' even though this "
"environment has already returned done = True. You "
"should always call 'reset()' once you receive 'done = "
"True' -- any further steps are undefined behavior.")
self.steps_beyond_done += 1
# Graceful after termination
return (self.grid, self.context), 0.0, True, {}
def __init__(
self,
env,
video_folder: str,
episode_trigger: Callable[[int], bool] = None,
step_trigger: Callable[[int], bool] = None,
video_length: int = 0,
name_prefix: str = "rl-video",
):
super().__init__(env)
if episode_trigger is None and step_trigger is None:
episode_trigger = capped_cubic_video_schedule
trigger_count = sum(x is not None
for x in [episode_trigger, step_trigger])
assert trigger_count == 1, "Must specify exactly one trigger"
self.episode_trigger = episode_trigger
self.step_trigger = step_trigger
self.video_recorder = None
self.video_folder = os.path.abspath(video_folder)
# Create output folder if needed
if os.path.isdir(self.video_folder):
logger.warn(
f"Overwriting existing videos at {self.video_folder} folder (try specifying a different `video_folder` for the `RecordVideo` wrapper if this is not desired)"
)
os.makedirs(self.video_folder, exist_ok=True)
self.name_prefix = name_prefix
self.step_id = 0
self.video_length = video_length
self.recording = False
self.recorded_frames = 0
self.is_vector_env = getattr(env, "is_vector_env", False)
self.episode_id = 0
def patch_deprecated_methods(env):
"""
Methods renamed from '_method' to 'method', render() no longer has 'close' parameter, close is a separate method.
For backward compatibility, this makes it possible to work with unmodified environments.
"""
global warn_once
if warn_once:
logger.warn(
"Environment '%s' has deprecated methods '_step' and '_reset' rather than 'step' and 'reset'. Compatibility code invoked. Set _gym_disable_underscore_compat = True to disable this behavior."
% str(type(env)))
warn_once = False
env.reset = env._reset
env.step = env._step
env.seed = env._seed
def render(mode):
return env._render(mode, close=False)
def close():
env._render("human", close=True)
env.render = render
env.close = close
def deprecated_warn_once(text):
global warn_once
if not warn_once: return
warn_once = False
logger.warn(text)
import gym
import pygame
import matplotlib
import argparse
from gym import logger
try:
matplotlib.use('TkAgg')
import matplotlib.pyplot as plt
except ImportError as e:
logger.warn('failed to set matplotlib backend, plotting will not work: %s' % str(e))
plt = None
from collections import deque
from pygame.locals import VIDEORESIZE
def display_arr(screen, arr, video_size, transpose):
arr_min, arr_max = arr.min(), arr.max()
arr = 255.0 * (arr - arr_min) / (arr_max - arr_min)
pyg_img = pygame.surfarray.make_surface(arr.swapaxes(0, 1) if transpose else arr)
pyg_img = pygame.transform.scale(pyg_img, video_size)
screen.blit(pyg_img, (0,0))
def play(env, transpose=True, fps=30, zoom=None, callback=None, keys_to_action=None):
"""Allows one to play the game using keyboard.
To simply play the game use:
play(gym.make("Pong-v4"))
Above code works also if env is wrapped, so it's particularly useful in
verifying that the frame-level preprocessing does not render the game
