Update app.py

app.py

@@ -8,7 +8,8 @@ import logging
 import nest_asyncio
 from typing import Dict, Any, List, Tuple
 import transformers
-from transformers import pipeline
+from transformers import pipeline, GPT2Tokenizer  # Add GPT2Tokenizer import
+
 # Remove OpenAI imports
 # from langchain_community.llms import OpenAI
 # from langchain.chains import LLMChain
@@ -476,4 +477,4 @@ class ChatInterface:
 
 if __name__ == "__main__":
     chat_interface = ChatInterface()
-    chat_interface.render_interface()
+    chat_interface.render_interface()