code: def reorder_categories(self, new_categories, ordered=None, inplace=False):
          
          inplace = validate_bool_kwarg(inplace, 'inplace')
          if set(self.dtype.categories) != set(new_categories):
              raise ValueError("items in new_categories are not the same as in "
                               "old categories")
          return self.set_categories(new_categories, ordered=ordered,
                                     inplace=inplace)
docs: Reorder categories as specified in new_categories.
  
          `new_categories` need to include all old categories and no new category
          items.
  
          Parameters
          ----------
          new_categories : Index-like
             The categories in new order.
          ordered : bool, optional
             Whether or not the categorical is treated as a ordered categorical.
             If not given, do not change the ordered information.
          inplace : bool, default False
             Whether or not to reorder the categories inplace or return a copy of
             this categorical with reordered categories.
  
          Returns
          -------
          cat : Categorical with reordered categories or None if inplace.
  
          Raises
          ------
          ValueError
              If the new categories do not contain all old category items or any
              new ones
  
          See Also
          --------
          rename_categories
          add_categories
          remove_categories
          remove_unused_categories
          set_categories