Fix keyword agument names in RunPython to be positional

        # object, representing the versioned models as an app registry.

        # We could try to override the global cache, but then people will still

        # use direct imports, so we go with a documentation approach instead.

        self.code(models=from_state.render(), schema_editor=schema_editor)

        self.code(from_state.render(), schema_editor)

    def database_backwards(self, app_label, schema_editor, from_state, to_state):

        if self.reverse_code is None:

            raise NotImplementedError("You cannot reverse this operation")

        self.reverse_code(models=from_state.render(), schema_editor=schema_editor)

        self.reverse_code(from_state.render(), schema_editor)

    def describe(self):

        return "Raw Python operation"