Multiselect default value

[Marisa_Smith]

Hi @Kenichiro_Ouchi,

First, welcome to the Stremalit community

To me, this looks like you might need to use session state to track values in the multiselect. But I’m not sure why you use a textbox to pass to a multiselect in this way. It seems to me that you want to filter the database first based on what the textbox has?

If so, I have a question: wouldn’t the built-in text-matching of the multiselect work for this? and if not why not?

To truly help, I would recommend adding a MWE (minimum working example) of code.

This is a helpful forum post about posting your first question on the forum:

Welcome ! Some suggestions for your first Streamlit question

Welcome to the Questions category, the place to be if you’re having issues with your code, want to chat on Streamlit best practices or share some exotic code snippets with other users Don’t hesitate to post any problem you’re having with Streamlit there, so other people can discuss it with you ! If you have trouble writing about your issue, from our experience the following details help a lot : A quick description of what you are trying to achieve and the roadb…

Happy Streamlit-ing!
Marisa