In form, how to in time get selectbox value? so that use the value to select

Using Streamlit
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1

Summary

I want to use form with selectbox, if selectbox value change, then adjust other inputnumber maxvalue, but it will apearance error? how to do? remove form?

Steps to reproduce

StreamlitAPIException: With forms, callbacks can only be defined on the st.form_submit_button. Defining callbacks on other widgets inside a form is not allowed.

Code snippet:

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Debug info

  • Streamlit version: (get it with $ streamlit version)
  • Python version: (get it with $ python --version)
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2

I want to use form with selectbox

Why? The whole point of forms is hiding changes in widget values from the application until the submit button is pressed. If you want the new values to be immediately available, then you don’t want the widget to be inside a form.

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