asyncio_taskgroup_concurrent_tasks_quickstart_example.py

1import asyncio
2import time
3
4async def say_after(delay, what):
5    await asyncio.sleep(delay)
6    print(what)
7
8async def main():
9    print(f"started at {time.strftime('%X')}")
10
11    async with asyncio.TaskGroup() as tg:
12        task1 = tg.create_task(say_after(1, 'hello'))
13        task2 = tg.create_task(say_after(2, 'world'))
14
15    # The context manager implicitly waits for all tasks to finish
16    print(f"finished at {time.strftime('%X')}")
17
18if __name__ == "__main__":
19    asyncio.run(main())