import asyncio


async def test1():
    print("---1---")
    await asyncio.sleep(5)    
    print("---2---")


async def test2():
    print("---3---")
    await asyncio.sleep(1)
    print("---4---")


async def test3():
    print("---5---")
    await asyncio.sleep(3)
    print("---6---")

def main():
    loop = asyncio.get_event_loop()
    print("begin")

    t1 = test1()
    t2 = test2()
    t3 = test3()
    tasks1 = [t1,t2,t3]


    loop.run_until_complete(asyncio.wait(tasks1))
    print("end")
    loop.close()

if __name__=="__main__":
    main()

begin
---3---
---1---
---5---
---4---
---6---
---2---
end