Streamlit - Periodic app rerun

st_demo_rerun.py

import random
import streamlit as st
from streamlit.ReportThread import get_report_ctx
from streamlit.server.Server import Server
from threading import Thread
from time import sleep


def main():
    st.line_chart(random.sample(range(100), 20))
    
    st.write(st.text_input("You can still interact with widgets."))
    st.write(st.slider("You can even slide normally.", 0, 10))

    rerun(.5)


def _get_session():
    session_id = get_report_ctx().session_id
    session_info = Server.get_current()._get_session_info(session_id)

    if session_info is None:
        raise RuntimeError("Couldn't get your Streamlit Session object.")
    
    return session_info.session


def _rerun_session(session, delay):
    sleep(delay)
    session.request_rerun()


def rerun(delay=0):
    session = _get_session()

    if delay <= 0:
        session.request_rerun()

    elif hasattr(session, "_rerun_thread") and session._rerun_thread.is_alive():
        return
    
    session._rerun_thread = Thread(target=_rerun_session, args=(session, delay))
    session._rerun_thread.start()


if __name__ == "__main__":
    main()