gistfile1.txt

import asyncio
import time
from typing import Any, Callable, Coroutine


async def uses_a_callback(callback: Callable[[int], Coroutine[Any, Any, None]]) -> None:
    t = time.monotonic_ns()
    await callback(t)


async def main() -> None:
    async def callback(t: int):
        print(f"Callback called with {t}")

    await uses_a_callback(callback)


if __name__ == "__main__":
    asyncio.run(main())