code: def stop(self):
          
          self._flush()
          filesize = self.file.tell()
          super(BLFWriter, self).stop()
  
          # Write header in the beginning of the file
          header = [b"LOGG", FILE_HEADER_SIZE,
                    APPLICATION_ID, 0, 0, 0, 2, 6, 8, 1]
          # The meaning of "count of objects read" is unknown
          header.extend([filesize, self.uncompressed_size,
                         self.count_of_objects, 0])
          header.extend(timestamp_to_systemtime(self.start_timestamp))
          header.extend(timestamp_to_systemtime(self.stop_timestamp))
          with open(self.file.name, "r+b") as f:
              f.write(FILE_HEADER_STRUCT.pack(*header))
docs: Stops logging and closes the file.