TypeError: send() takes 2 positional arguments but 3 were given

test.md

I've created test.py as a self contained example demonstrating the problem I am facing.

In the application I am working on, I have an asyncio.Queue object, in which I put tuples of (asyncio.Future, dict).

However, whenever executing this code using PYTHONASYNCIODEBUG=1, I get a strange error on the queue.get() method.

Here's the error on the test.py script:

$ PYTHONASYNCIODEBUG=1 ./test.py 
Traceback (most recent call last):
  File "./test.py", line 10, in get
    yield from queue.get()
TypeError: send() takes 2 positional arguments but 3 were given

test.py

#!/usr/bin/env python3.4
import asyncio
import traceback


@asyncio.coroutine
def get(queue):
    try:
        # Get the message from the queue
        yield from queue.get()
    except Exception:
        # This is just to show the exception stacktrace
        traceback.print_exc()


@asyncio.coroutine
def main_loop():
    queue = asyncio.Queue()

    asyncio.async(get(queue))

    # Add a pair of placeholder values.
    asyncio.async(queue.put((asyncio.Future(), None)))

    # We need to let this function sleep, so the event loop can process the get() method
    yield from asyncio.sleep(0.5)


if __name__ == "__main__":
    loop = asyncio.get_event_loop()
    loop.run_until_complete(main_loop())