code: def _get_checksum():
      
      digest = hashlib.sha256()
      with open(RPM_PATH, "rb") as rpm_db_fh:
          while True:
              buff = rpm_db_fh.read(0x1000)
              if not buff:
                  break
              digest.update(buff)
      return digest.hexdigest()
docs: Get the checksum of the RPM Database.
  
      Returns:
          hexdigest