code: def reindex_axis(self, labels, axis=0, **kwargs):
          
          # for compatibility with higher dims
          if axis != 0:
              raise ValueError("cannot reindex series on non-zero axis!")
          msg = ("'.reindex_axis' is deprecated and will be removed in a future "
                 "version. Use '.reindex' instead.")
          warnings.warn(msg, FutureWarning, stacklevel=2)
  
          return self.reindex(index=labels, **kwargs)
docs: Conform Series to new index with optional filling logic.
  
          .. deprecated:: 0.21.0
              Use ``Series.reindex`` instead.