Method call_at

tornado/ioloop.py:619–635

Runs the ``callback`` at the absolute time designated by ``when``. ``when`` must be a number using the same reference point as `IOLoop.time`. Returns an opaque handle that may be passed to `remove_timeout` to cancel. Note that unlike the `asyncio` method of the sam

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

        return self.call_at(self.time() + delay, callback, *args, **kwargs)

    def call_at(
        self, when: float, callback: Callable, *args: Any, **kwargs: Any
    ) -> object:
        """Runs the ``callback`` at the absolute time designated by ``when``.

        ``when`` must be a number using the same reference point as
        `IOLoop.time`.

        Returns an opaque handle that may be passed to `remove_timeout`
        to cancel.  Note that unlike the `asyncio` method of the same
        name, the returned object does not have a ``cancel()`` method.

        See `add_timeout` for comments on thread-safety and subclassing.

        .. versionadded:: 4.0
        """
        return self.add_timeout(when, callback, *args, **kwargs)

    def remove_timeout(self, timeout: object) -> None:
        """Cancels a pending timeout.