aio container.workspace() always returns None #176

#!/usr/bin/env python3

import asyncio
import logging

from i3ipc.aio import Connection

SOCKET_FILE = '/tmp/.i3-cycle-focus.sock'

class FocusWatcher:
    def __init__(self):
        self.i3 = None

    async def connect(self):
        self.i3 = await Connection().connect()
        self.i3.on('window::focus', self.on_window_focus)

    async def on_window_focus(self, i3conn, event):
        logging.info('got window focus event')
        ws = await event.container.workspace().name  # ***always returns None***

    async def run(self):
        async def handle_switch(reader, writer):
            data = await reader.read(1024)
            logging.info('received data: {}').format(data)

        server = await asyncio.start_unix_server(handle_switch, SOCKET_FILE)
        await server.serve_forever()

async def run_server():
    focus_watcher = FocusWatcher()
    await focus_watcher.connect()
    await focus_watcher.run()


if __name__ == '__main__':
    logging.basicConfig(level=logging.DEBUG)
    asyncio.run(run_server())