add langsmith

app.py

@@ -8,9 +8,13 @@ from chainlit.prompt import Prompt, PromptMessage  # importing prompt tools
 from chainlit.playground.providers import ChatOpenAI  # importing ChatOpenAI tools
 from dotenv import load_dotenv
 from src.retrieval_lib import initialize_index, load_pdf_to_text, split_text, load_text_to_index, query_index, create_answer_prompt, generate_answer
+from uuid import uuid4
 
 load_dotenv()
 
+os.environ["LANGCHAIN_TRACING_V2"] = "true"
+os.environ["LANGCHAIN_PROJECT"] = f"fcb2b - {uuid4().hex[0:8]}"
+
 retriever = initialize_index()
 
 @cl.on_chat_start  # marks a function that will be executed at the start of a user session

src/retrieval_lib.py

@@ -14,8 +14,6 @@ from langchain_core.runnables import RunnablePassthrough
 
 
 LLM_MODEL_NAME = "gpt-4-turbo"
-os.environ["LANGCHAIN_TRACING_V2"] = "true"
-os.environ["LANGCHAIN_PROJECT"] = f"fcb2b - {uuid4().hex[0:8]}"
 
 # LLM_MODEL_NAME = "gpt-3.5-turbo"