Update app.py

app.py

@@ -1,8 +1,11 @@
 import gradio as gr
 import random
 from transformers import pipeline
+from transformers import GPT2Tokenizer, GPT2LMHeadModel
 #https://huggingface.co/facebook/opt-1.3b
 generator = pipeline('text-generation', model="microsoft/DialoGPT-medium")
+tokenizer = GPT2Tokenizer.from_pretrained('microsoft/DialoGPT-medium')
+model = GPT2LMHeadModel.from_pretrained('microsoft/DialoGPT-medium')
 
 def create_audio(input_str):
   output_raw= generator(input_str)