app.py

import gradio as gr
from langchain.llms import HuggingFaceHub
from transformers import AutoTokenizer

# Define the Hugging Face model and tokenizer
model_name = "microsoft/DialoGPT-medium"
tokenizer = AutoTokenizer.from_pretrained(model_name)

# Define the LangChain chat agent
agent = HuggingFaceHub(
    model_name=model_name,
    task="text2text-generation",
    tokenizer=tokenizer,
)

# Define the Gradio interface
def chatbot_interface(input_text):
    response = agent(input_text)
    return response

# Define the Gradio app
gradio_app = gr.Interface(
    fn=chatbot_interface,
    inputs=gr.inputs.Textbox(prompt="Say something..."),
    outputs=gr.outputs.Textbox(),
    title="LangChain Chatbot",
    description="A chatbot interface powered by LangChain and Hugging Face.",
)

# Run the Gradio app
if __name__ == "__main__":
    gradio_app.run()