When choosing from the multiselectbox below, I find that I have to click the options twice in order for it to register in the streamlit application. By default the select shows the years 2017-2019. If I then click ‘2016’ it shows 2016-2019, correctly. If I then click ‘2015’ it show 2016-2019 once…

Hey @Pbennekou , welcome to Streamlit! I assume you’re using the SessionState gist ? This is some bugginess around the SessionState implementation, and how it interacts with Streamlit’s rerun logic. As a workaround, you can do something like this: import streamlit as st from streamlit.ScriptReques…

Thank you Tim, that worked out exactly as intended! I will look forward to the “official” implementation of SessionState in the future, but this will do for now :slight_smile:

I seem to have the same problem with a text area. The solution proposed here does not work for me, I guess as I am doing other things with “session” variables here as well. My current solution is that I present users the message that their next edit will be ignored, which works for a while but is n…

This still seems to be a problem. I have a st.number_input in my script, and it only works correctly on every second press of the step buttons. Every other time it will just reset to the previously displayed value. I am using my own implementation of something like SessionState, however mine saves …

I am using the official SessionState but I still encounter this issue for both selectboxes and text_input (version 0.84.1). The flow is that I load a data set and the first row. The sidebar widgets get populated with the features from the row and the main area shows the observed label and the predi…

Thank you. I see what you mean about using keys for widgets but I don’t know how I would repopulate all the widgets with the new data when I load a new line… EDIT: Oh wait, I think I see it. I can write directly into the state for that key without damaging anything, right? So if I have a function t…

import streamlit as st if 'sel_key' in st.session_state : # do not run this the first time st.write(f'the selected item is: {st.session_state["sel_key"]}') st.selectbox('test me',(1,2,3),index=1,key='sel_key') # no explicit session_state here!

Quick update: I gave up on this. Using widget keys I couldn’t figure out how to get the widgets populated correctly when I loaded a new line (I would get the first index in a selectbox and I’m pretty sure that the text_input widgets would just never change). I decided that writing a caveat and movi…

Thanks a lot! I never really understood what the keys were about and didn’t bother, but using them in this case really solves the problem! :grinning: (And as I had the problem only with one st.multiselect input, applying keys wasn’t too much of an effort in my case.)

Multiselect only updating for every second input

Using Streamlit

ksxx July 23, 2021, 12:42pm 7

see this: Unexpected session_state behaviour - Using Streamlit - Streamlit

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Multiselect only updating for every second input

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