code: def _assign(self, pos, exp):
      self.obs[pos] = exp.obs
      self.reward[pos] = exp.reward
      self.action[pos] = exp.action
      self.isOver[pos] = exp.isOver
  
file_path: PARL/benchmark/fluid/offline-Q-learning/replay_memory.py
imports: import numpy
  import copy
  import os
  from collections import deque, namedtuple
  from parl.utils import logger
label_desc: Use image node_id 7 for calling the ReplayMemory obj's underlying member method code with example usage: obj._assign(pos, exp) without return types