Update app.py

app.py

@@ -1,4 +1,5 @@
 import streamlit as st
 
-x = st.slider('Select a value')
-st.write(x, 'squared is', x * x)
+from langchain.llms import OpenAi
+st.set_page_config(page_title="Langchain Demo",page_icon=":robot:")
+st.header("Langchain Demo")