在python3.11中，使用异步上下文管理器async with和asyncio.TaskGroup()可以简单地解决这个问题。

import asyncio

i = 0

async def foo():
    while True:
        print("foo")
        await asyncio.sleep(1)

async def bar():
    while True:
        global i
        i += 1
        if i > 14:
            raise ValueError()

        print("bar", i)
        await asyncio.sleep(1)

async def on_interval(n):
    while True:
        async with asyncio.TaskGroup() as tg1:
            print("Restarting bar")
            task2 = tg1.create_task(bar())

            await asyncio.sleep(n)

            print("Canceling bar")
            task2.cancel()
         

async def main():
    async with asyncio.TaskGroup() as tg:
        task1 = tg.create_task(foo())
        task3 = tg.create_task(on_interval(3))

asyncio.run(main())

-------------------------

foo
Restarting bar
bar 1
foo
bar 2
foo
bar 3
Canceling bar
foo
Restarting bar
bar 4
  + Exception Group Traceback (most recent call last):
  |   File "C:\Users\ф\PycharmProjects\tkinter\rrr.py", line 42, in <module>
  |     asyncio.run(main())
  |   File "C:\Users\ф\AppData\Local\Programs\Python\Python311\Lib\asyncio\runners.py", line 190, in run
  |     return runner.run(main)
  |            ^^^^^^^^^^^^^^^^
  |   File "C:\Users\ф\AppData\Local\Programs\Python\Python311\Lib\asyncio\runners.py", line 118, in run
  |     return self._loop.run_until_complete(task)
  |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |   File "C:\Users\ф\AppData\Local\Programs\Python\Python311\Lib\asyncio\base_events.py", line 650, in run_until_complete
  |     return future.result()
  |            ^^^^^^^^^^^^^^^
  |   File "C:\Users\ф\PycharmProjects\tkinter\rrr.py", line 37, in main
  |     async with asyncio.TaskGroup() as tg:
  |   File "C:\Users\ф\AppData\Local\Programs\Python\Python311\Lib\asyncio\taskgroups.py", line 135, in __aexit__
  |     raise me from None
  | ExceptionGroup: unhandled errors in a TaskGroup (1 sub-exception)
  +-+---------------- 1 ----------------
    | Exception Group Traceback (most recent call last):
    |   File "C:\Users\ф\PycharmProjects\tkinter\rrr.py", line 25, in on_interval
    |     async with asyncio.TaskGroup() as tg1:
    |   File "C:\Users\ф\AppData\Local\Programs\Python\Python311\Lib\asyncio\taskgroups.py", line 135, in __aexit__
    |     raise me from None
    | ExceptionGroup: unhandled errors in a TaskGroup (1 sub-exception)
    +-+---------------- 1 ----------------
      | Traceback (most recent call last):
      |   File "C:\Users\ф\PycharmProjects\tkinter\rrr.py", line 17, in bar
      |     raise ValueError()
      | ValueError
      +------------------------------------
foo

Process finished with exit code 1

将可能生成异常代码 Package 在try catch块中。

import asyncio

async def background_task():
    try:
        # code that could potentially raise an exception
    except Exception as e:
        # handle the exception as desired
        raise e

async def main():
    # start the background task
    task = asyncio.create_task(background_task())

    # wait for the background task to complete
    await task

if __name__ == "__main__":
    asyncio.run(main())