How do I enable for submit button after disabling?

Using Streamlit
1

Summary

I don’t want user to press button twice for some lengthy running job. I was able to disable the form submit button, however I am not able to enable it afterwards.

Steps to reproduce

def disable():
    st.session_state.disabled = True

def enable():
    if "disabled" in st.session_state and st.session_state.disabled == True:
        st.session_state.disabled = False
        print('true')

if "disabled" not in st.session_state:
    st.session_state.disabled = False
# Create the form
with st.form("my_form"):
    keyword = st.text_input('Product Name?')
    placeholder = st.empty()
    placeholder.text("")
    
    chk_scrap = st.checkbox('Fenix Scraping')
    chk_image = st.checkbox('Download Image')
    chk_fb = st.checkbox('Facebook')
    chk_caro = st.checkbox('Carousell')


    submitted = st.form_submit_button(
        "Submit", on_click=disable, disabled=st.session_state.disabled)



if submitted:    

    if chk_scrap:
        if keyword:
            try:
                Fenix.search_item(keyword)
            except Exception as e:
                st.warning(e)
        else:
            st.warning('Please enter product name!')

    if chk_image:
        if keyword:
            try:
                Fenix.get_image(keyword)
            except Exception as e:
                st.warning(e)
        else:
            st.warning('Please enter product name!')

    enable()
2

Seems like the placement of your enable function is the issue, it should be outside of the if submitted code
I tried running this and it works on my end

import time
import streamlit as st

def disable():
    st.session_state.disabled = True

def enable():
    if "disabled" in st.session_state and st.session_state.disabled == True:
        st.session_state.disabled = False

if "disabled" not in st.session_state:
    st.session_state.disabled = False

# Create the form
with st.form("my_form"):
    keyword = st.text_input('Product Name?')
    placeholder = st.empty()
    placeholder.text("")


    chk_scrap = st.checkbox('Fenix Scraping')
    chk_image = st.checkbox('Download Image')
    chk_fb = st.checkbox('Facebook')
    chk_caro = st.checkbox('Carousell')

    submitted = st.form_submit_button("Submit", on_click=disable, disabled=st.session_state.disabled)

if submitted:
    if chk_scrap:
        if keyword:
            try:
                # Simulating a lengthy running job
                time.sleep(5)
                st.success("Fenix Scraping completed successfully")
            except Exception as e:
                st.warning(e)
        else:
            st.warning('Please enter product name!')

    if chk_image:
        if keyword:
            try:
                # Simulating a lengthy running job
                time.sleep(5)
                st.success("Image download completed successfully")
            except Exception as e:
                st.warning(e)
        else:
            st.warning('Please enter product name!')

# Enable the submit button after the jobs have completed
enable()

Hope it helps!

3

thank you for your help!

However, it is still not working my end.

screen
screen947×587 25.4 KB

Not sure what 's wrong here.

4

You won’t see the change until the next rerun, but there won’t be a rerun until you interact with the UI. Call st.experimental_rerun() after enabling the button to force a rerun.

1 Like
5

i already clicked rerun , clear cache and even put your code to another file, still not working.

6

may i know what ver you are using, i am using streamlit==1.23.1

7

Just to be clear, the st.experimental_rerun() that @Goyo mentioned is a function–a line of code to add to your script.

8

i see what you mean now, it works now, thank you for the explanation.
@ Goyo, thank you so much

1 Like
9

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