The make_async function takes a synchronous function (for instance a LangChain agent) and returns an asynchronous function that will run the original function in a separate thread. This is useful to run long running synchronous tasks without blocking the event loop.

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Parameters

func
Callable

The synchronous function to run in a separate thread.

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Returns

async_function
Coroutine
required

The asynchronous function that will run the synchronous function in a separate thread.

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Usage

Pure Python
import time
import chainlit as cl

def sync_func():
    time.sleep(5)
    return "Hello!"

@cl.on_message
async def main(message: cl.Message):
    answer = await cl.make_async(sync_func)()
    await cl.Message(
        content=answer,
    ).send()
LangChain agent
import chainlit as cl

res = await cl.make_async(agent)(input_str, callbacks=[cl.LangchainCallbackHandler()])
await cl.Message(content=res["text"]).send()

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