Resets the iterator and ignore roll over data

def hard_reset(self):
        """Resets the iterator and ignore roll over data"""
        if self.seq is not None and self.shuffle:
            random.shuffle(self.seq)
        if self.imgrec is not None:
            self.imgrec.reset()
        self.cur = 0
        self._allow_read = True
        self._cache_data = None
        self._cache_label = None
        self._cache_idx = None