@manager.task()
async def task_01(num):
    print('Task 01 starting: {}'.format(num))
    (await asyncio.sleep(2, loop=loop))
    print('Task 01 stopping')
    return 'a'
@manager.task()
async def task_01(num):
    print('Task 01 starting: {}'.format(num))
    (await asyncio.sleep(2, loop=loop))
    print('Task 01 stopping')
    return 'a'