Update app.py

app.py

@@ -1,7 +1,7 @@
 from langchain.chains import ConversationalRetrievalChain
 from langchain.memory import ConversationBufferMemory, ConversationSummaryMemory
 from langchain.chat_models import ChatOpenAI
-
+from langsmith import traceable
 
 from langchain.text_splitter import CharacterTextSplitter, RecursiveCharacterTextSplitter
 from langchain.embeddings.openai import OpenAIEmbeddings
@@ -44,6 +44,7 @@ messages = [
 ]
 qa_prompt = ChatPromptTemplate.from_messages( messages )
 
+@traceable
 pdf_qa = ConversationalRetrievalChain.from_llm(
             llm = llm,
             retriever=vectordb.as_retriever(search_kwargs={'k':16})