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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _iterslice(self, slice):
 """Yield records from a slice index."""

        indices = range(*slice.indices(len(self._records)))
        if self.is_attached():
            rows = self._enum_attached_rows(indices)
            if slice.step is not None and slice.step < 0:
                rows = reversed(list(rows))
        else:
            rows = zip(indices, self._records[slice])

        fields = self.fields
        for i, row in rows:
            yield Record._make(fields, row, self, i)