code: def guess_train_one_epoch_time(self):
      # only have information for 4 epoch
      d = dict.fromkeys(self.data101_full)
      keys = random.sample(list(d), 15000)
  
      # pick the max value over 5k arch training time
      res = 0
      for rep_time in range(15000):
          arch_id = keys[rep_time]
          _, time_usage = self.get_c10_test_info(
              arch_id=arch_id, dataset=Config.c10, epoch_num=4
          )
          if time_usage > res:
              res = time_usage
      return res
  
imports: import os
  import random
  from src.common.constant import Config
  from src.tools.io_tools import read_json, write_json
  from src.query_api.singleton import Singleton
  from src.tools.io_tools import read_pickle
  from src.tools.compute import generate_global_rank
label_desc: Use image node_id 5 for calling the Gt101 obj's underlying member method code with example usage: obj.guess_train_one_epoch_time() and returns: res