code: def save(self):
      npy_file = "./q_table.npy"
      np.save(npy_file, self.Q)
      print(npy_file + " saved.")
  
file_path: PARL/examples/tutorials/lesson2/q_learning/agent.py
imports: import numpy
label_desc: Use image node_id 5 for calling the QLearningAgent obj's underlying member method code with example usage: obj.save() without return types