code: def _set_axis_name(self, name, axis=0, inplace=False):
          
          axis = self._get_axis_number(axis)
          idx = self._get_axis(axis).set_names(name)
  
          inplace = validate_bool_kwarg(inplace, 'inplace')
          renamed = self if inplace else self.copy()
          renamed.set_axis(idx, axis=axis, inplace=True)
          if not inplace:
              return renamed
docs: Set the name(s) of the axis.
  
          Parameters
          ----------
          name : str or list of str
              Name(s) to set.
          axis : {0 or 'index', 1 or 'columns'}, default 0
              The axis to set the label. The value 0 or 'index' specifies index,
              and the value 1 or 'columns' specifies columns.
          inplace : bool, default False
              If `True`, do operation inplace and return None.
  
              .. versionadded:: 0.21.0
  
          Returns
          -------
          Series, DataFrame, or None
              The same type as the caller or `None` if `inplace` is `True`.
  
          See Also
          --------
          DataFrame.rename : Alter the axis labels of :class:`DataFrame`.
          Series.rename : Alter the index labels or set the index name
              of :class:`Series`.
          Index.rename : Set the name of :class:`Index` or :class:`MultiIndex`.
  
          Examples
          --------
          >>> df = pd.DataFrame({"num_legs": [4, 4, 2]},
          ...                   ["dog", "cat", "monkey"])
          >>> df
                  num_legs
          dog            4
          cat            4
          monkey         2
          >>> df._set_axis_name("animal")
                  num_legs
          animal
          dog            4
          cat            4
          monkey         2
          >>> df.index = pd.MultiIndex.from_product(
          ...                [["mammal"], ['dog', 'cat', 'monkey']])
          >>> df._set_axis_name(["type", "name"])
                         legs
          type   name
          mammal dog        4
                 cat        4
                 monkey     2