asyncio_return_values.py

import asyncio


async def do_something_long_running(sec=1) -> bool:
    print(f"sleep for {sec}s")
    await asyncio.sleep(sec)
    return True


async def coro_a(t):
    return await do_something_long_running(t)


async def coro_b(t):
    return await not_a_coro(t)


async def coro_c(t):
    return not_a_coro(t)


def not_a_coro(t):
    return do_something_long_running(t)


async def main():
    print(await coro_a(1))
    print(await coro_b(2))
    print(await coro_c(3))


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

$ python3.7 asyncio_return_values.py
sleep for 1s
True
sleep for 2s
True
<coroutine object do_something_long_running at 0x7f94107511c8>
asyncio_return_values.py:29: RuntimeWarning: coroutine 'do_something_long_running' was never awaited
  print(await coro_c(3))
RuntimeWarning: Enable tracemalloc to get the object allocation traceback