app.py

import streamlit as st
from openai import OpenAI, APIError
import os
import tenacity

# Get the OpenAI API key from the Space settings
ACCESS_TOKEN = os.getenv("HF_TOKEN")

# Get the model name from the Space settings
MODEL =  "NousResearch/Hermes-3-Llama-3.1-8B"

client = OpenAI(
    base_url="https://api-inference.huggingface.co/v1/",
    api_key=ACCESS_TOKEN,
)

@tenacity.retry(wait=tenacity.wait_exponential(multiplier=1, min=4, max=10))
def respond(
    message,
    history: list[tuple[str, str]],
    system_message,
    max_tokens,
    temperature,
    top_p,
):
    try:
        messages = [{"role": "system", "content": system_message}]

        for val in history:
            if val[0]:
                messages.append({"role": "user", "content": val[0]})
            if val[1]:
                messages.append({"role": "assistant", "content": val[1]})

        messages.append({"role": "user", "content": message})

        response = ""
        
        for message in  client.chat.completions.create(
            model=MODEL,
            max_tokens=max_tokens,
            stream=True,
            temperature=temperature,
            top_p=top_p,
            messages=messages,
        ):
            token = message.choices[0].delta.content
            
            response += token
            yield response
    except APIError as e:
        error_details = e.body
        error_type = error_details.get("type")
        error_code = error_details.get("code")
        error_param = error_details.get("param")
        error_message = error_details.get("message")

        if error_type:
            error_str = f"{error_type}: {error_message} (code: {error_code}, param: {error_param})"
        else:
            error_str = "An error occurred during streaming"

        print(f"Error: {error_str}")
        yield error_str
    except Exception as e:
        print(f"Error: {e}")
        yield "Error occurred. Please try again."

st.title("Chatbot")
st.write("Type a message to chat with the bot")

message = st.text_input("Message")
history = []
system_message = st.text_input("System message")
max_tokens = st.slider("Max new tokens", 1, 2048, 2048)
temperature = st.slider("Temperature", 0.1, 4.0, 0.7)
top_p = st.slider("Top-P", 0.1, 1.0, 0.95)

if st.button("Send"):
    response = respond(message, history, system_message, max_tokens, temperature, top_p)
    for resp in response:
        st.write(resp)