code: def download_data():
      global train_ids
      if not os.path.exists(LOCAL_ASSET_NAME):
          os.system(f"curl {DL_URL} --output {LOCAL_ASSET_NAME}")
  
      if not os.path.exists(LOCAL_FOLDER_NAME):
          os.system(f"tar xzf {LOCAL_ASSET_NAME}")
  
      train_ids = [
          name.split(".")[0]
          for name in os.listdir(train_dir)
          if name.split(".")[0] != ""
      ]
  
imports: import os
  import pickle
  import shutil
  import time
  import numpy
  import wandb
  from PIL import Image
label_desc: Use image node_id 2 for calling a global function with example usage: download_data() without return types