Preserving Page State in Streamlit App with Multiple Pages

[dataprofessor]

Hi @Anandhu_H

Typically, a Streamlit app runs from top to bottom and upon widget interaction the app state is reset. Thus, upon changing the page, the previous widget state would be reset.

To address that, you can look into using session state. Please see the following Docs page to get started:

Session State - Streamlit Docs

Add statefulness to apps - Streamlit Docs

Also, the following forum post seems to be relevant:

Multi-page apps with widget state preservation. The simple way

@okld I have beent thinking about your remark: Unfortunately this will cause an error if you assign a key to a button, download_button, file_uploader or a form. In which case would you need a key for a button? Can’t a callback function (on_click = …) work as an equivalent? I can’t think of a case where you would want to store the state of a button in session_state.

Hope this helps!