code: def __init__(self, maxlen, shape, dtype="float32"):
      self.maxlen = maxlen
      self.start = 0
      self.length = 0
      self.data = np.zeros((maxlen,) + shape).astype(dtype)
  
file_path: baselines/baselines/ddpg/memory.py
imports: import numpy
label_desc: Use image node_id 1 to create a new RingBuffer object from inherited base classes: object with example: obj = RingBuffer(maxlen, shape, dtype)