<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _execute(self, ifile, process):
 """ Default processing loop :param ifile: Input file object. :type ifile: file :param process: Bound method to call in processing loop. :type process: instancemethod :return: :const:`None`. :rtype: NoneType """

        self._record_writer.write_records(process(self._records(ifile)))
        self.finish()