Update app.py

app.py

@@ -23,6 +23,10 @@ else:
 
 # Initialize LangChain client (hypothetical example)
 #lc_client = Client(api_key=LANGCHAIN_API_KEY)
+
+from langchain import SomeLangChainClass  # Replace with the correct class
+client = SomeLangChainClass(api_key=api_key_langchain)
+#
 lc = LangChain(api_key=api_key_langchain)