getting this: 135837 #18 2.058 ImportError: cannot import name 'event_handler' from 'livekit.agents'

Thanks for reaching out, Shashwat. I'm an AI assistant and I'm here to help. Give me a moment while I research this topic.

I am using it like this: @event_handler("data_received") async def handle_data_message(self, data: bytes, participant): """Handle incoming data messages from frontend client.""" try: # Decode and parse the data message message_str = data.decode('utf-8') message = json.loads(message_str) # Check if this is an end_of_conversation message if message.get("type") == "end_of_conversation": reason = message.get("reason", "unknown") timestamp = message.get("timestamp", "unknown") print(f"Received end_of_conversation from frontend: {reason} at {timestamp}") except (UnicodeDecodeError, json.JSONDecodeError) as e: print(f"Failed to parse data message: {e}") except Exception as e: print(f"Error handling data message: {e}")

Hey there! Just a quick heads-up: the decorator

@event_handler

isn’t actually part of the LiveKit API, which is why you’re seeing that error. No worries though—LiveKit has some solid ways to handle events for data messages. Here are a few options you might find helpful: • Event Emission in Python: You can use the

emit

method to manage events like

data_received

. Here’s a quick example:

self.emit(
    "data_received",
    DataPacket(
        data=data,
        kind=packet.kind,
        participant=rparticipant,
        topic=packet.user.topic,
    ),
)

• Topic-Based Filtering: You can filter messages by topics, which makes it easier to handle specific types of data messages. • Reliable and Lossy Delivery: Depending on your needs, you can pick reliable (ordered delivery) or lossy (single send) modes for sending messages. Could you let me know if you’re focusing on handling

data_received

events specifically, or if you’d like some help setting up a custom event handler? I’m here to help and can guide you based on what you need! Sources: Data messages | LiveKit Docs | packages/react/src/hooks/useDataChannel.ts | livekit-compose-components/src/main/java/io/livekit/android/compose/flow/Da... | Sources/LiveKit/Protocols/ParticipantDelegate.swift | Shared/Contexts/RoomContext.swift

Is this the right way to receive data messages from the client?

Hey there! Just a quick heads-up: the approach you're using with

@event_handler

isn’t supported in LiveKit because the

event_handler

decorator isn’t actually part of the LiveKit API. To properly receive data messages from the client, it’s best to use the event emission pattern that LiveKit provides. Here’s a friendly example of how you can handle

data_received

events in Python:

self.emit(
    "data_received",
    DataPacket(
        data=data,
        kind=packet.kind,
        participant=rparticipant,
        topic=packet.user.topic,
    ),
)

This way, you can easily process incoming data messages, filter them by topic, and handle everything just right. If you want a hand with implementing this or tailoring it to your specific setup, just give me a shout—I’m here to help!