A sample streamlit navigation template

streamlit_navigation_template.py

import streamlit as st
from pages.login import login
from pages.page1 import page1
from pages.page2 import page2

def init_session():
    # Check if the user is signed in
    if "signed_in" not in st.session_state:
        st.session_state["signed_in"] = False
    
    if "pages" not in st.session_state:
        st.session_state["pages"] = "login"

def main():  
    init_session()
    
    # A container for the main content
    main_container = st.container()
    with main_container:
        if st.session_state['signed_in']:
            if st.session_state['pages'] == "page1":
                page1()
            
            if st.session_state['pages'] == 'page2':
                page2()

        else:
            if st.session_state['pages'] == 'login':
                login()    
    
if __name__ == "__main__":
    main()