added StdOutCallBackhandler

pipeline.py

@@ -28,7 +28,8 @@ from langchain.prompts import PromptTemplate
 from langchain.docstore.document import Document
 
 from langchain.callbacks.base import BaseCallbacks  # Updated import
-from langchain.callbacks.manager import CallbackManager
+# from langchain.callbacks.manager import CallbackManager
+from langchain.callbacks import StdOutCallbackHandler
 # Custom chain imports
 from classification_chain import get_classification_chain
 from refusal_chain import get_refusal_chain
@@ -203,7 +204,7 @@ class NoOpCallbacks(BaseCallbacks):
     def on_chain_error(self, *args, **kwargs): pass
 
 # Create a callback manager with no-op callbacks
-callback_manager = CallbackManager([NoOpCallbacks()])
+callback_manager = CallbackManager([StdOutCallbackHandler()])
 
 # Initialize ChatGroq with the callback manager
 try: