app.py

# Q&A Chatbot
from langchain.llms import OpenAI

from dotenv import load_dotenv

load_dotenv() #take environment variables from .env

import streamlit as st
import os

## Function to load OpenAI model and get responses

def get_openai_response(question):
    llm=OpenAI(openai_api_key=os.getenv("OPENAI_API_KEY"),model="gpt-3.5-turbo-instruct",temperature=0.5)
    response=llm(question)
    return response

## initialize our streamlit app

st.set_page_config(page_title="Q&A Demo")

st.header("Langchain Application")

input=st.text_input("Input: ", key="input")
response=get_openai_response(input)

submit=st.button("Generate")

## If Generate button is clicked

if submit:
    st.subheader("The response is")
    st.write(response)