asyncio_taskgroup_concurrent_tasks_quickstart.py

1import asyncio
2
3async def main():
4    async with asyncio.TaskGroup() as tg:
5        task1 = tg.create_task(say_after(1, 'hello'))
6        task2 = tg.create_task(say_after(2, 'world'))
7
8        print(f"started at {asyncio.get_running_loop().time():.2f}")
9
10    # The await is implicit when the context manager exits.
11
12    print(f"finished at {asyncio.get_running_loop().time():.2f}")
13
14async def say_after(delay, what):
15    await asyncio.sleep(delay)
16    print(what)
17
18asyncio.run(main())