app.py

# YACI - Hugging Face Spaces

# OpenAI chat completion
import os
from openai import AsyncOpenAI
import chainlit as cl
from chainlit.prompt import Prompt, PromptMessage # prompt tools
from chainlit.playground.providers import ChatOpenAI # Chainlit's OpenAI tools
from dotenv import load_dotenv

load_dotenv()

# Model config
MODEL = "gpt-4o-mini-2024-07-18"
MAX_TOKENS = 500
TEMP = 0
TOP_P = 1

# ChatOpenAI
system_template = """You are a helpful assistant who always speaks in a pleasant tone!"""

user_template = """{input}
Think through your response step by step.
"""

@cl.on_chat_start       # init user chat session
async def start_chat():
    settings = {
        "model": MODEL,
        "temperature": TEMP,
        "max_tokens": MAX_TOKENS,
        "top_p": TOP_P,
        "frequency_penalty": 0,
        "presence_penalty": 0,
    }

    cl.user_session.set("settings", settings)

@cl.on_message      # runs each time the chatbot receives a message from a user
async def main(message: cl.Message):
    settings = cl.user_session.get("settings")

    client = AsyncOpenAI()

    print(message.content)

    prompt = Prompt(
        provider=ChatOpenAI.id,
        messages=[
            PromptMessage(
                role="system",
                template=system_template,
                formatted=system_template,
            ),
            PromptMessage(
                role="user",
                template=user_template,
                formatted=user_template.format(input=message.content),
            ),
        ],
        inputs={"input": message.content},
        settings=settings,
    )

    print([m.to_openai() for m in prompt.messages])

    msg = cl.Message(content="")

    # Call OpenAI
    async for stream_resp in await client.chat.completions.create(
        messages=[m.to_openai() for m in prompt.messages], stream=True, **settings
    ):
        token = stream_resp.choices[0].delta.content
        if not token:
            token = ""
        await msg.stream_token(token)

    # Update the prompt object with the completion
    prompt.completion = msg.content
    msg.prompt = prompt

    # Send and Close the message stream
    await msg.send()