Update app.py

app.py

@@ -9,6 +9,14 @@ from langchain.embeddings import TensorflowHubEmbeddings,HuggingFaceEmbeddings
 import gradio as gr
 from langchain.memory import ConversationBufferMemory
 from langchain.chains import ConversationalRetrievalChain
+
+
+os.environ['LANGSMITH_TRACING']="true"
+os.environ['LANGSMITH_ENDPOINT']="https://api.smith.langchain.com"
+os.environ['LANGSMITH_API_KEY']=os.getenv('langsmith_api')
+os.environ['LANGSMITH_PROJECT']="chat_with_nasir_hussain"
+# OPENAI_API_KEY="<your-openai-api-key>"
+
 embeddings=HuggingFaceEmbeddings(model_name='sentence-transformers/all-MiniLM-L6-v2')
 llm=ChatGroq(api_key=os.getenv('groq_api'))
 vector_db = Chroma(persist_directory='./db', embedding_function=embeddings)