code: def gen_subfolder(root, dim, rows, file_num):
      suffix = entity_suffix(rows)
      subfolder = f"{dim}d_{suffix}_{file_num}"
      path = f"{root}/{subfolder}"
      if not os.path.isdir(path):
          os.mkdir(path)
      return subfolder
  
imports: import copy
  import json
  import os
  import time
  import numpy
  import pandas
  import random
  from faker import Faker
  from sklearn import preprocessing
  from common.common_func import gen_unique_str
  from common.minio_comm import copy_files_to_minio
  from utils.util_log import test_log
label_desc: Use image node_id 17 for calling a global function with example usage: gen_subfolder(root, dim, rows, file_num) and returns: subfolder