code: def _ixs(self, i, axis=0):
          
  
          ax = self._get_axis(axis)
          key = ax[i]
  
          # xs cannot handle a non-scalar key, so just reindex here
          # if we have a multi-index and a single tuple, then its a reduction
          # (GH 7516)
          if not (isinstance(ax, MultiIndex) and isinstance(key, tuple)):
              if is_list_like(key):
                  indexer = {self._get_axis_name(axis): key}
                  return self.reindex(**indexer)
  
          # a reduction
          if axis == 0:
              values = self._data.iget(i)
              return self._box_item_values(key, values)
  
          # xs by position
          self._consolidate_inplace()
          new_data = self._data.xs(i, axis=axis, copy=True, takeable=True)
          return self._construct_return_type(new_data)
docs: Parameters
          ----------
          i : int, slice, or sequence of integers
          axis : int