Session_state - how to use it to save values while navigating through a multi_page app?

[clay_ferguson]

It’s not quite as simple as “yes it just works”. Streamlit definitely has a bug, and this is the thread where I posted my solution:

Session State need to work a Sane Way

I’ve noticed that session state variables get deleted if not “used” by GUI component on the page. This is not a sensible behavior because you don’t know if I’m going to use that variable again or not so please leave it alone! I have a settings page where I let the user pick a certain “mode” that needs to remain set forever, unless I change it. Just because I navigate to a new page that doesn’t render any GUI using this “mode” property doesn’t mean you should just delete that property. That’s go…