Combination of Drop-down menu (st.selectbox) with a Button (st.Button) to control execution flow doesn't work 💥

[GokulNC]

What you need is this:

Multi-page app with session state

Edit: Streamlit 0.84.0 has officially introduced session state. Go check it out: Session State for Streamlit Hello there For a project I needed to build multi-page app with a settings page. As I’ve seen this topic requesting the feature, I decided to share the solution I came up with. It features a custom version of @thiago’s SessionState. It still relies on hacks, but it should work in most cases. It was tested with Streamlit version 0.61.0 (and now 0.65). Things you must…

That is, store the button pressed state in a session state and use that for your further steps (say step-3).

The problem occurs because when you press a button in step-2, it will be marked as true only during the first refresh. When you change anything beyond that, the subsequent refresh will return false for the button pressed state.