I wish to show different fields in a form, depending on what values a radio button takes. The radio button must be shown after some of the text entry fields and before some of the others. This runs, but the radio button gets put at the bottom of the page: form = st.form("form", border = False) fir…

[image] plokmijn12345: I then get an error of “cannot access local variable ‘use_case’ where it is not associated with a value” when checking if use_case == "complex". You are trying to use a variable that has not been declared yet. The use of containers helps with placing elements in the pag…

@plokmijn12345 , this thread probably answers your question: [image] Updating radio inside a form Using Streamlit Widgets can change if they are defined outside the form but are positioned inside the form using a placeholder like st.empty. Not sure if that is expected beha…

Thank you, but I don’t think that works. Like, if you put things in empty elements, they will change when clicked, but you still can’t create a field in the form itself that depends on them.

Perhaps I misunderstood, is not this :point_down: the behavior you are after? [changing_form]

How are you doing that? I have something like: with st.form("form"): space_for_selecting_use_case = st.empty() if use_case == "complex": additional_input = st.text_input("Additional Input") with space_for_selecting_use_case: use_case = st.radio( label = "Select your us…

Thank you! I did not know that using an st.container() within an st.empty() element would do the job. Adding more st.empty() containers at the bottom would have worked, but things in them would rerun the page when changed. How did you know that using an st.container() within an st.empty() would allo…

How do you change the contents of a form based on radio buttons?

Using Streamlit

edsaac June 21, 2024, 8:00pm 2

@plokmijn12345, this thread probably answers your question:

Topic		Replies	Views
Updating radio inside a form Using Streamlit	4	2840	February 7, 2024
With form radio button and select box not working Using Streamlit	11	2307	December 5, 2023
How to call an event whenever the value of radio changes Using Streamlit streamlit-cloud	2	1811	July 20, 2023
Placeholder in a form 'cause of st.radio - having trouble with submit_button Using Streamlit	3	456	December 15, 2023
How to use radio buttons in chat_input? Using Streamlit	12	2377	February 10, 2024

How do you change the contents of a form based on radio buttons?

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