Method set_result

Lib/asyncio/futures.py:261–271

Mark the future done and set its result. If the future is already done when this method is called, raises InvalidStateError.

(self, result)

    # So-called internal methods (note: no set_running_or_notify_cancel()).

    def set_result(self, result):
        """Mark the future done and set its result.

        If the future is already done when this method is called, raises
        InvalidStateError.
        """
        if self._state != _PENDING:
            raise exceptions.InvalidStateError(f'{self._state}: {self!r}')
        self._result = result
        self._state = _FINISHED
        self.__schedule_callbacks()

    def set_exception(self, exception):
        """Mark the future done and set an exception.