code: def exclude_fields(self, *args):
          
          if not args:
              raise ValueError("Field list cannot be None.")
          new_df = copy_df(self)
          fields = _render_field_set(args)
          self._assert_ml_fields_valid(*fields)
          new_df._perform_operation(op.ExcludeFieldsOperation(fields))
          return new_df
docs: Exclude one or more fields from feature fields.
  
          :rtype: DataFrame