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fanhaipeng0403
V2EX  ›  Python

async await 使用例子

  •  
  •   fanhaipeng0403 · 2018-12-31 19:36:47 +08:00 · 1339 次点击
    这是一个创建于 1913 天前的主题,其中的信息可能已经有所发展或是发生改变。
    import asyncio
    
    async def slow_operation(n):
        await asyncio.sleep(n)
        print('Slow operation {} complete'.format(n))
        return n
    
    
    loop = asyncio.get_event_loop()
    done, _ = loop.run_until_complete(
     asyncio.wait([
            slow_operation(1),
            slow_operation(2),
            slow_operation(9),
            slow_operation(2),
            slow_operation(1),
            slow_operation(2),
            slow_operation(3),
            ]))
    for fut in done:
        print("return value is {}".format(fut.result()))
    

    Slow operation 1 complete
    Slow operation 1 complete
    Slow operation 2 complete
    Slow operation 2 complete
    Slow operation 2 complete
    Slow operation 3 complete
    Slow operation 9 complete
    return value is 2
    return value is 1
    return value is 2
    return value is 1
    return value is 9
    return value is 3
    return value is 2

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