def __init__(self, env, k):
    'Stack k last frames.\n        Returns lazy array, which is much more memory efficient.\n        See Also\n        --------\n        baselines.common.atari_wrappers.LazyFrames\n        '
    gym.Wrapper.__init__(self, env)
    self.k = k
    self.frames = deque([], maxlen=k)
    shp = env.observation_space.shape
    self.observation_space = spaces.Box(low=0, high=255, shape=(((shp[0] * k),) + shp[1:]), dtype=env.observation_space.dtype)
Stack k last frames.
Returns lazy array, which is much more memory efficient.
See Also
--------
baselines.common.atari_wrappers.LazyFrames
def __init__(self, env, k):
    'Stack k last frames.\n        Returns lazy array, which is much more memory efficient.\n        See Also\n        --------\n        baselines.common.atari_wrappers.LazyFrames\n        '
    gym.Wrapper.__init__(self, env)
    self.k = k
    self.frames = deque([], maxlen=k)
    shp = env.observation_space.shape
    self.observation_space = spaces.Box(low=0, high=255, shape=(((shp[0] * k),) + shp[1:]), dtype=env.observation_space.dtype)