code: def _check_exist_file_md5(filename, md5sum, url):
      return _md5check(filename, md5sum)
  
imports: import os, sys
  import os.path
  import hashlib
  import requests
  import shutil
  import tqdm
  import time
  import tarfile
  import zipfile
  from paddle.utils.download import _get_unique_endpoints
label_desc: Use image node_id 5 for calling a global function with example usage: _check_exist_file_md5(filename, md5sum, url) and returns: _md5check