### asyncio.Future, аналог concurrent.futures.Future
import asyncio

async def slow_operation(future):
    await asyncio.sleep(1)
    future.set_result("Future is done!")

loop = asyncio.get_event_loop()
future = asyncio.Future()
asyncio.ensure_future(slow_operation(future))

loop.run_until_complete(future)
print(future.result())

loop.close()