Update app.py

app.py

@@ -4,6 +4,7 @@ from langchain_core.runnables import RunnableBranch
 from langchain_core.runnables.passthrough import RunnableAssign
 from langchain_core.runnables import RunnableLambda
 from langchain_nvidia_ai_endpoints import ChatNVIDIA, NVIDIAEmbeddings
+from functools import partial
 
 import gradio as gr