Demonstration of cancellation fail

curiotest.py

import curio


async def main():
    async def cancel():
        await curio.sleep(0.1)
        await task.cancel(blocking=False)

    event = curio.Event()
    task = await curio.current_task()
    for _ in range(2):
        await curio.spawn(cancel, daemon=True)
        print('waiting on the event')
        try:
            await event.wait()
        except curio.TaskCancelled:
            print('task cancelled')


curio.run(main)