How to use asyncio based library like aiohttp

Libraries
1

since python 3.12 we have been experiencing issues with our current python backend libraries that are using asyncio libs like aiohttp and aiocoap. As there’s not a lot documentation, or at least I didn’t find it, could someone give me some pointers on how to use this. Currently getting errors like; no event loop, or not receiving any data in tasks wich are supposed to run in the background.

mostly struggling when to use asyncio.run or use
loop = asyncio.get_running_loop()
loop.run_until_complete(self._socket.send_json(msg))

The first works but I find it difficult to get returns from a background task that should fire when receiving data. The second gives issues as it sometimes states no event loop.
Call stack in vscode shows an asyncio thread but …

Any help appreciated
Cheers
Edwin

3

Hi Feni,

thanks for your information.
I’ve used asyncio.run on top-level async operations and that is working. Tip is that the run command should handle all inside that command. (all meaning: connection setup, communicate and close)
For the websocket server and http server. I’ve started them on a separate thread with own event loop. That allowed me to use tasks and queues with asyncio.run_coroutine_threadsafe() to run routines from robotframework on the correct event loops.

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