code: def reset_agent(self, batch_size=1):
      self.alg._init_hidden_states(batch_size)
  
file_path: PARL/examples/QMIX/qmix_agent.py
imports: import paddle
  import parl
  import numpy
  from utils import AvailableActionsSampler
  import os
label_desc: Use image node_id 4 for calling the QMixAgent obj's underlying member method code with example usage: obj.reset_agent(batch_size) without return types