Runtime error: Event loop is running

Question

I get the following error when I call the function send_message.

Exception in thread Thread-1:
Traceback (most recent call last):
  File \"/usr/lib/         


        

Answer 1

The "Event loop is running" exception indicates you called loop.run_until_complete on a loop that is already running, perhaps in another thread.

1. If the loop is already running in another thread and you want to submit a coroutine for it to execute, use:

   asyncio.run_coroutine_threadsafe(client.send_message(SERVER, message), client.loop)
   

2. If you are trying to add a coroutine to the loop and that loop is running on the current thread, then the best way is probably to just await/yield from it

3. If you're scheduling it from a synchronous function, then you probably want:

   asyncio.ensure_future(
       client.send_message(SERVER, message),
       loop=client.loop
   ).add_done_callback(fn)
   

   Where fn is a function whose only parameter is the future that is created by ensure_future and which is called after the future is completed.