code: def md5(fname):
      hash_md5 = hashlib.md5()
  
      with open(fname, "rb") as f:
          for chunk in iter(lambda: f.read(CHUNK_SIZE), b""):
              hash_md5.update(chunk)
  
      return hash_md5.hexdigest()
  
imports: import hashlib
  import pathlib
label_desc: Use image node_id 1 for calling a global function with example usage: md5(fname) and returns: hash_md5