[英]asyncio, alternatives to deprecated run_forever
I am creating a web server with aiohttp and here is the code I use to start it:我正在使用 aiohttp 创建一个 web 服务器,这是我用来启动它的代码:
loop = asyncio.get_event_loop()
loop.create_task(main())
loop.run_forever()
I am using run_forever to keep the server started and not close it once it has been created.我正在使用 run_forever 来保持服务器启动并且在创建后不关闭它。 Unfortunately I now get this warning:
不幸的是我现在收到这个警告:
/Users/thomas/workspace/eykar/eykache2/eykache/__main__.py:17: DeprecationWarning: There is no current event loop
loop = asyncio.get_event_loop()
According to the doc I should consider using asyncio.run, but I do not know how to do keep my program running then.根据文档,我应该考虑使用 asyncio.run,但我不知道如何让我的程序继续运行。
run_forever
isn't deprecated. run_forever
未弃用。 There's nothing wrong with using it.使用它没有错。 What is deprecated, however, is calling
get_event_loop
when there isn't one running and expecting it to create one for you.然而,不推荐使用的是在没有运行时调用
get_event_loop
并期望它为您创建一个。 At some point in the future this will stop doing this.在未来的某个时候,这将停止这样做。 Instead you need to make your own loop.
相反,您需要制作自己的循环。
loop = asyncio.new_event_loop()
asyncio.set_event_loop(loop)
You may also be able to replace all of this with asyncio.run(main())
and a while True
loop inside main
.您也可以将所有这些替换为
asyncio.run(main())
和main
中的while True
循环。
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