Display and value mismatch with warning

[BeverlyAb]

Hi,

I noticed that when I create multiple pages, widgets (selectbox, slider, multiselect) will have persistent values across pages, but renders/displays a default value. Overall, there is a mismatch between the value returned by the widget and what is displayed.

My work around for this was to set the widget’s default (which is either specified by index or value) to the state of the widget (st.session_state.key_name). It functions fine from my perspective, but I receive a warning:
“The widget with key “lag” was created with a default value but also had its value set via the Session State API.”

How can I suppress this warning on contrarily is there a better way to handle my issue?

Thanks

[Marisa_Smith]

Hey @BeverlyAb,

Fisrt welcome to the Streamlit community!

Check out this post for the answer to your question (spoilers: remove the value default!)

Why do default values cause a session state warning?

Hey @quantoid, When the team was designing st.session_state they had played around with a few options on how state would interact with parameters like value for specifying default ones. For right now, this is expected behaviour but the team is looking into changing it, along with some other changes they are considering for state. We will circle back to this in the near future. In the meantime, you can remove the value parameter and that will remove the warning your seeing. Hope this helps! H…

Happy Streamlit-ing!
Marisa