No running event loop

[aaronclong]

I am having trouble creating the janus Queue outside of asyncio. It requires me to make dummy background tasks to just create the object, since not running loop exists I am wonder if this could be lazy or allow the loop to be passed in the constructor? It makes sync to async code a tad harder.

[blozano824]

I was able to use janus v0.4.0 successfully but upgrading to v1.0.0 results in the same code raising RuntimeError: no running event loop. I haven't been able to pin down the exact change that caused this.

[lemonJumps]

From my understanding it needs an existing asyncio loop in main thread in order to work.
I tried to force it to use a loop from separate thread but it didn't like that.

[lemonJumps]

actually, I've found this https://github.com/dano/aioprocessing it has a queue that works like a charm. <3

[jettify]

I suspect problem as described here #438

[ghost]

Any progress of this Issue? Same problem when I creating a queue in the sync function and pass it to the async one.

[OppOops]

Simple way to create janus queue in synchronous code (Python 3.6+).

import asyncio
import janus

def init_janus_queue(loop: asyncio.AbstractEventLoop):
    async def create_queue():
        return janus.Queue()
    return loop.run_until_complete(create_queue())

#create your own loop before initializing, note that the loop must remain the same afterword
#loop = asyncio.new_event_loop()
#asyncio.set_event_loop(loop)

res_queue = init_janus_queue(loop)