Update chatbot_rag.py

chatbot_rag.py

@@ -1,9 +1,9 @@
-
 from langchain_community.vectorstores import Chroma
 from langchain_community.embeddings import HuggingFaceEmbeddings
 from langchain_community.llms import HuggingFacePipeline
 from transformers import AutoTokenizer, AutoModelForCausalLM, pipeline
 from langchain.chains import RetrievalQA
+import traceback  # ✅ added
 
 
 def build_qa():
@@ -55,12 +55,14 @@ def build_qa():
     print("✅ QA pipeline ready.")
     return qa
 
+
 # Build at import time (so it's ready when app runs)
 try:
     qa_pipeline = build_qa()
 except Exception as e:
     qa_pipeline = None
     print("❌ Failed to build QA pipeline:", e)
+    traceback.print_exc()   # ✅ added: full error details
 
 
 def get_answer(query: str) -> str: