pages/langchain_demo.py

import os

import openai
import streamlit as st

from models.langOpen import LangOpen
from utils.chatbox import chatbox

st.set_page_config(page_title="Langchain", page_icon="")

st.subheader("Langchain with OpenAI Demo")

if "messages" not in st.session_state:
    st.session_state.messages = []

if "openai_api_key" not in st.session_state:
    st.info("Enter your openai key to access the chatbot.")
else:
    option = st.selectbox(
        label="Select your model:", options=("gpt-3.5-turbo", "gpt-4")
    )

    with st.spinner(f"Initializing {option} ..."):
        langOpen = LangOpen(model_name=option)

    chatbox("lang_open", langOpen)