app.py

import gradio as gr

from transformers import AutoModelWithLMHead, AutoTokenizer

tokenizer = AutoTokenizer.from_pretrained("microsoft/DialoGPT-medium")
model = AutoModelWithLMHead.from_pretrained("microsoft/DialoGPT-medium")

def chatbot(input_text):
    input_ids = tokenizer.encode(input_text, return_tensors='pt')
    output = model.generate(input_ids, max_length=50, do_sample=True, top_k=50, top_p=0.95, num_return_sequences=3)
    output_text = tokenizer.decode(output[0], skip_special_tokens=True)
    return output_text

iface = gr.Interface(fn=chatbot, inputs="text", outputs="text", description="ChatGPT")
iface.launch()