code: def get_hash_tuple(header_path, cython_path, gen_file_path):
      """Get the hashes from the given files"""
  
      header_hash = (
          sha1_of_file(header_path)
          if os.path.exists(header_path)
          else "NA"
      )
      from_hash = sha1_of_file(cython_path)
      to_hash = (
          sha1_of_file(gen_file_path)
          if os.path.exists(gen_file_path)
          else "NA"
      )
  
      return header_hash, from_hash, to_hash
  
file_path: pyflux/tools/cythonize.py
imports: from __future__ import division, print_function, absolute_import
  import os
  import re
  import sys
  import hashlib
  import subprocess
label_desc: Use image node_id 6 for calling a global function with example usage: get_hash_tuple(header_path, cython_path, gen_file_path) and returns: header_hash,  from_hash,  to_hash