code: def save_path(self):
      if self._save_path is None:
          save_path = "%s/checkpoint" % self._path
          os.makedirs(save_path, exist_ok=True)
          save_path = os.path.join(save_path, "model.ckpt")
          self._save_path = save_path
      return self._save_path
  
imports: import os
  import shutil
  import tensorflow
  import numpy
  import time
  from datetime import timedelta
  import json
  import pickle
label_desc: Use image node_id 2 for calling the BasicModel obj's underlying member method code with example usage: obj.save_path() and returns: self