code: def calc_md5(file_name):
      """Calculates md5 hash of an existing file"""
      import hashlib
  
      curr_hash = hashlib.md5()
      with open(file_name, "rb") as file_in:
          chunk = file_in.read(8192)
          while chunk:
              curr_hash.update(chunk)
              chunk = file_in.read(8192)
      return curr_hash.hexdigest()
  
file_path: neoml/NeoML/samples/python/cifar10.py
imports: import neoml
  import numpy
  import os
  import time
  import tarfile
label_desc: Use image node_id 1 for calling a global function with example usage: calc_md5(file_name) and returns: curr_hash