How to create streamlit app with pagination

Using Streamlit
2

Its because you check for the session state before the button, this should work

import streamlit as st

if "page" not in st.session_state:
    st.session_state["page"] = 1


st.title("Test")

empty = st.empty()

if st.button("Next"):
    st.session_state["page"] = 2

if st.button("Previous"):
    st.session_state["page"] = 1

if st.session_state["page"] == 1:
    empty.write("Page 1")
elif st.session_state["page"] == 2:
    empty.write("Page 2")
else:
    empty.write("No page")

streamlit-dummy-2021-11-17-10-11-38

Hope it helps!