Update app.py

app.py

@@ -182,7 +182,7 @@ def list_run_steps(client, thread, run):
         print(step_details)
         print(step_details.message_creation)
 
-        if hasattr(not step_details, "tool_calls")
+        if not hasattr(step_details, "tool_calls"):
         #if not step_details.tool_calls:
             break