Playing with graceful shutdown

file.py

import asyncio


tasks = []


async def f():
    print("start f")
    # await asyncio.sleep(5)
    import time; time.sleep(5)
    print("end f")


async def executer():
    tasks.append(asyncio.create_task(f()))
    await asyncio.gather(*tasks)


async def main():
    try:
        await executer()
    except:
        await asyncio.gather(*tasks)


async def complete_tasks(loop):
    try:
        await asyncio.wait_for(asyncio.gather(*tasks, loop=loop), timeout=10, loop=loop)
    except asyncio.TimeoutError:
        print("Some tasks were not finished on time")


loop = asyncio.get_event_loop()
try:
    loop.run_until_complete(main())
except:
    loop.run_until_complete(complete_tasks(loop))

finally:
    loop.close()