Update app.py

app.py

@@ -10,6 +10,11 @@ from langchain_community.retrievers import PineconeHybridSearchRetriever
 from langchain.tools.retriever import create_retriever_tool
 from langgraph.prebuilt import create_react_agent
 
+
+os.environ['LANGCHAIN_TRACING_V2'] = "true"
+
+os.environ['LANGCHAIN_ENDPOINT'] = "https://api.smith.langchain.com"
+
 # Download the NLTK tokenizer (if not already downloaded)
 nltk.download('punkt_tab')