def timeout_at(deadline: Optional[float]) -> "Timeout":
    """Schedule the timeout at absolute time.

    deadline argument points on the time in the same clock system
    as loop.time().

    Please note: it is not POSIX time but a time with
    undefined starting base, e.g. the time of the system power on.

    >>> async with timeout_at(loop.time() + 10):
    ...     async with aiohttp.get('https://github.com') as r:
    ...         await r.text()


    """
    loop = _get_running_loop()
    return Timeout(deadline, loop)
Schedule the timeout at absolute time.

    deadline argument points on the time in the same clock system
    as loop.time().

    Please note: it is not POSIX time but a time with
    undefined starting base, e.g. the time of the system power on.

    >>> async with timeout_at(loop.time() + 10):
    ...     async with aiohttp.get('https://github.com') as r:
    ...         await r.text()


    
lib/async_timeout/__init__.py