def _update_measurements(self):
self._last_idx = self._now_idx<EOL>self._last_time  = self._now_time<EOL>self._now_idx = self._iter_idx<EOL>self._now_time = default_timer()<EOL>self._between_time = self._now_time - self._last_time<EOL>self._between_count = self._now_idx - self._last_idx<EOL>self._total_seconds = self._now_time - self._start_time<EOL>
update current measurements and estimated of time and progress