code: def call_command(self, name, *arguments, **options):
          
          command, defaults = get_command_and_defaults(
              name,
              exclude_packages=self.get_exclude_packages(),
              exclude_command_class=self.__class__)
          if command is None:
              raise management.CommandError(
                  "Unknown command: {name:s}".format(
                      name=name))
          defaults.update(options)
          return command.execute(*arguments, **defaults)
docs: Finds the given Django management command and default options,
          excluding this command, and calls it with the given arguments
          and override options.