Python异步异常处理全攻略

import asyncio

async def might_fail():
    await asyncio.sleep(1)
    raise ValueError("出错了！")

async def main():
    try:
        await might_fail()
    except ValueError as e:
        print(f"捕获到异常: {e}")

asyncio.run(main())

async def task1():
    raise RuntimeError("任务1失败")

async def task2():
    return "任务2成功"

async def task3():
    return "任务3成功"

async def main():
    results = await asyncio.gather(
        task1(), task2(), task3(),
        return_exceptions=True
    )
    
    for result in results:
        if isinstance(result, Exception):
            print(f"任务出错: {result}")
        else:
            print(f"任务结果: {result}")

asyncio.run(main())

async def bad_task():
    await asyncio.sleep(1)
    raise KeyError("键错误")

async def main():
    task = asyncio.create_task(bad_task())
    
    try:
        await task
    except KeyError as e:
        print(f"捕获任务异常: {e}")

async def slow_function():
    await asyncio.sleep(10)

async def main():
    try:
        await asyncio.wait_for(slow_function(), timeout=3)
    except asyncio.TimeoutError:
        print("函数执行超时")