app.py

import openai
import os
import gradio as gr
from langchain.chat_models import ChatOpenAI
from langchain.schema import AIMessage, HumanMessage

os.environ["OPENAI_API_KEY"] = "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"  # Replace with your key

llm = ChatOpenAI(temperature=1.0, model='gpt-3.5-turbo-0613')

def predict(message, history):
    history_langchain_format = []
    for human, ai in history:
        history_langchain_format.append(HumanMessage(content=human))
        history_langchain_format.append(AIMessage(content=ai))
    history_langchain_format.append(HumanMessage(content=message))
    gpt_response = llm(history_langchain_format)
    return gpt_response.content 
 
gr.ChatInterface(
    predict,
    chatbot=gr.Chatbot(height=300),
    textbox=gr.Textbox(placeholder="Custom GPT", container=False, scale=7),
    title="Custom ChatGPT",
    description="Ask any question",
    theme="soft",
    examples=["Hello", "are you GPT-4?", "how can i build my own ChatGPT?"],
    cache_examples=True,
    retry_btn=None,
    undo_btn="Delete Previous",
    clear_btn="Clear",
).launch()