Method add_callback_from_signal

python/python3/tornado/ioloop.py:643–651

Calls the given callback on the next I/O loop iteration. Safe for use from a Python signal handler; should not be used otherwise.

(
        self, callback: Callable, *args: Any, **kwargs: Any
    )

        raise NotImplementedError()

    def add_callback_from_signal(
        self, callback: Callable, *args: Any, **kwargs: Any
    ) -> None:
        """Calls the given callback on the next I/O loop iteration.

        Safe for use from a Python signal handler; should not be used
        otherwise.
        """
        raise NotImplementedError()

    def spawn_callback(self, callback: Callable, *args: Any, **kwargs: Any) -> None:
        """Calls the given callback on the next IOLoop iteration.