code: def get_hash_tuple(header_path, cython_path, gen_file_path):
      
  
      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
docs: Get the hashes from the given files