Clean up st.selectbox widget after st.run()

Using Streamlit
1

Hi, i would like to know if this is possible to return valie of st.selectbox to default after we st.rerun.

For example:

all_names = ['red', 'blue', 'green']
name = st.selectbox(
            "Add Name",
            options=all_names,
            index=None,
            placeholder="Here you should add your name",
            key=dropdown_add_name_key,
            label_visibility="collapsed",
        )
if name:
    print(name)
    st.rerun()

I would expect that after rerun, my widget goes back to value of placeholder, namely: “Here you should add your name”. But it does not, as it kept to be the same value as user selected. Is there a way to re-initialize it to placeholder?

2

I think adding st.session_state[dropdown_add_name_key] = None before calling selectbox should do.