code: def ensure_dir(dir_path):
      r"""Make sure the directory exists, if it does not exist, create it
  
      Args:
          dir_path (str): directory path
  
      """
      if not os.path.exists(dir_path):
          os.makedirs(dir_path)
  
imports: import datetime
  import importlib
  import os
  import random
  import pandas
  import numpy
  import torch
  import torch.nn
  from torch.utils.tensorboard import SummaryWriter
  from texttable import Texttable
  from recbole.utils.enum_type import ModelType
label_desc: Use image node_id 2 for calling a global function with example usage: ensure_dir(dir_path) without return types