get_root_node function and RuntimeError: This event loop is already running

Question

I need to get access to all the nodes in an opcua server (and their corresponding nodeIDs), it seems that the get_root_node function is the way to go, though the following script errors, i.e., RuntimeError: This event loop is already running.I'm facing the similar issue, i.e., (RuntimeError: This event loop is already running), in my script:

import asyncio
from asyncua import Client

# asyncio.set_event_loop(asyncio.new_event_loop())

import nest_asyncio
nest_asyncio.apply()


async def browse_nodes(client, node):
    print(node, node.nodeid)
    children = await node.get_children()
    for child in children:
        await browse_nodes(client, child)

async def main():
    client = Client(url="opc.tcp://localhost:4840/freeopcua/server/")
    try:
        await client.connect()

        root_node = client.get_root_node()
        await browse_nodes(client, root_node)
    finally:
        await client.disconnect()

if __name__ == '__main__':
    asyncio.run(main())
    # loop = asyncio.get_event_loop()
    # loop.run_until_complete(main())
  

in my case, using the nest_asyncio didn't resolve the issue, it ran Into another error, as follows:

File "C:\Users\mahshad.valipour\Anaconda3\lib\asyncio\tasks.py", line 492, in wait_for
    raise exceptions.TimeoutError() from exc

TimeoutError

I've tried all the suggestions mentioned here (RuntimeError: This event loop is already running in python) and still no luck. Any suggestions on how to fix it would be greatly appreciated.

I've tried all the suggestions mentioned here (RuntimeError: This event loop is already running in python) and still no luck. Any suggestions on how to fix it would be greatly appreciated.