i am initializing agent with some custom data i am putting i LiveKit Community #ask-ai

i am initializing agent with some custom data i am...

kind-iron-94532

08/10/2025, 4:59 PM

i am initializing agent with some custom data i am putting in init method

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python
class AssistantAgent(Agent):
    """
    AI Assistant Agent that uses assistant-specific configuration.
    Supports dynamic TTS providers, custom prompts, and advanced call handling.
    """

    async def __init__(
        self,
        *,
        assistant_config: dict):
             self.assistant: Dict[str, Any] = assistant_config
             .......

@function_tool() async def transfer_call(context: RunContext, reason: str = "Customer requested transfer") -> str: ......... @function_tool() async def end_call_on_trigger(context: RunContext, reason: str = "", msg: str = "") ........... how can i access assistant in function tools?

tall-airline-16756

08/10/2025, 4:59 PM

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

tall-airline-16756

08/10/2025, 5:00 PM

Hey there! To grab the

assistant

instance variable inside your function tools, you can simply use the

context.userdata

property that comes with

RunContext

. Here’s a quick example to make it clearer:

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from livekit.agents import Agent, RunContext, function_tool

class AssistantAgent(Agent):
    def __init__(self, *, assistant_config: dict):
        super().__init__()
        self.userdata = {"assistant": assistant_config}

    @function_tool()
    async def transfer_call(self, context: RunContext, reason: str = "Customer requested transfer") -> str:
        assistant_data = context.userdata.get("assistant")
        return f"Transferring call using assistant: {assistant_data}"

So, what’s happening here? • The

assistant

variable gets stored in

self.userdata

when the class is initialized. • Then, inside your function tool, you can easily access it with

context.userdata.get("assistant")

. This way, your function tools can flexibly tap into the

assistant

configuration whenever they need to. Hope that helps!

kind-iron-94532

08/10/2025, 5:03 PM

so i have to pass self.userdata = {"assistant": assistant_config} before super()._init_() or after it?

tall-airline-16756

08/10/2025, 5:03 PM

Hey! It’s best to assign

self.userdata = {"assistant": assistant_config}

after you call

super().__init__()

. This way, the parent class finishes setting up before you tweak or add your own instance data like

userdata

. Here’s how you can do it:

Copy code

class AssistantAgent(Agent):
    def __init__(self, *, assistant_config: dict):
        super().__init__()  # Initialize the parent class
        self.userdata = {"assistant": assistant_config}  # Set userdata after

If anything’s unclear or you want to dive deeper, just give me a shout!

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