How to overwrite the value user input

Using Streamlit
1

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is that a way to overwrite or clear user input value by click a button?

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for example, by click the button, clear the text input value.

2

Yes, you can store the value of the click and if its true, set the value of the text input to blank.

import streamlit as st

placeholder = st.empty()

input = placeholder.text_input('text')
click_clear = st.button('clear text input', key=1)
if click_clear:
    input = placeholder.text_input('text', value='', key=1)

This works for me. Does it answer your q?

Dinesh

3 Likes
3

it works, thanks. another trick in streamlit. it is amazing. Thanks.

1 Like
4

In your case, I think you can use “st.form” and “st.form_submit_button”, the former with the parameter: clear_on_submit = True (st.form - Streamlit Docs, st.form_submit_button - Streamlit Docs)

5

Why are the keys for button and text_input equal? Does this create a link of some kind between the objects?
Also, help me understand how does do placeholder work in this case: if it didn’t exist we would get a DuplicateWidget exception for the text_input, is that right?

6

@victorccaldas
that code is old. I suggest using the st.form and st.form_submit_button as jgcaceresr suggested.