Question

我是Python异步编程的新手，互联网并没有帮助我解决问题-你们中有人有解决方案吗？

我有一个无限循环，其中读取了一些传感器数据。但是，传感器的读取速度很慢，所以我要等待传感器的信号。

我对它的期望如下（只是示意图）：

    import bno055 #sensor library
    import asyncio
    
    aync def read_sensor():
           altitude=bno055.read()
           #..and some other unimportant lines which I hide here
           return altitude


    def main():

       while 1:
          await current_altitude= read_sensor() #??? how can I "await" the sensor signals?
          #....some other lines which I hide here, but they need to run syncronously
          print(current_altitude)

       
      

   main()

提前谢谢

Answer 1

要执行阻止IO的await函数，您可以通过run_in_executor来运行它

def read_sensor():
    altitude=bno055.read()
    #..and some other unimportant lines which I hide here
    return altitude

loop = asyncio.get_running_loop()
altitude = await loop.run_in_executor(None, read_sensor)

Answer 2

我尝试了不同的变化：

    def read_sensor():
        altitude=bno055.read()
        #..and some other unimportant lines which I hide here
        return altitude

    async def main():
      while 1:
        loop = asyncio.get_running_loop()
        altitude = await loop.run_in_executor(None, read_sensor)
        ##.....##

    asyncio.run(main())

->这会引发错误，即asyncio没有“运行”方法...我的错误在哪里？

Python异步调用同步函数

2 个答案: