connections set async def websocket_handler request ws web WebSocketRe

connections = set()


async def websocket_handler(request):
    ws = web.WebSocketResponse()
    await ws.prepare(request)

    async for msg in ws:
        if msg.type == WSMsgType.TEXT:
            connections.add(ws)
            await ws.send_str('answer')

    connections.remove(ws)
    return ws