Update app.py

app.py

@@ -73,7 +73,7 @@ chat_history = []
 def interact(user_input, history):
     global tokenizer, model
     try:
-        if tokenizer is None or model is not initialized:
+        if tokenizer is None or model is None:
             raise ValueError("Tokenizer or model is not initialized.")
         
         messages = history + [{"role": "user", "content": user_input}]
@@ -97,7 +97,7 @@ def interact(user_input, history):
         formatted_history = [(entry["content"], None) if entry["role"] == "user" else (None, entry["content"]) for entry in history if entry["role"] in ["user", "assistant"]]
         return "", formatted_history, history
     except Exception as e:
-        if torch.cuda.is available():
+        if torch.cuda.is_available():
             torch.cuda.empty_cache()
         print(f"Error during interaction: {e}")
         raise gr.Error(f"An error occurred during interaction: {str(e)}")
@@ -208,4 +208,4 @@ with gr.Blocks() as demo:
     send_message_button.click(fn=interact, inputs=[chatbot_input, chat_history_json], outputs=[chatbot_input, chatbot_output, chat_history_json])
     save_button.click(fn=save_comment_score, inputs=[chatbot_output, score_input, comment_input, story_dropdown, user_dropdown], outputs=[data_table, comment_input])
 
-demo.launch()
+demo.launch()