Length of List affects selectbox behaviour?

🎈 Using Streamlit
1

Dear Community,

It seems that selectbox doesn’t behave properly if the list is more than 136 items long? i.e. list of countries in the world ( st.sidebar.selectbox(’’,countries) )? Anybody experienced a similar problem? So if the list is that long, selectbox will always select first element in your list regardless of your choice? And I wonder if there is an alternative to have such longlist other than selectbox

Thanks

2

Hi @eelyan, welcome to the forum :wave:

It seems to work ok for me. Do you see the same behavior with the script below?

import streamlit as st

options = list(range(150))
i1 = st.sidebar.selectbox("selectbox 1", options, 1)
st.write("value 1:", i1)

Could you share debug info?

  • Streamlit version: (get it with $ streamlit version)
  • Python version: (get it with $ python --version)
  • Using Conda? PipEnv? PyEnv? Pex?
  • OS version:
  • Browser version:
3

Thank you so much for your prompt reply, I use Python 3.7.4 , no virtual env and the OS is Mac. Your code works perfectly, however, when using my list instead, it didn’t work , top_conf is a list of 185 country names

options = top_conf
i1 = st.sidebar.selectbox("Select Country", options, 3)
st.write("You Selected:", i1)
4

Could you provide sample code, including data, that we can copy/paste and run to reproduce your issue?

5

Dear Jonathan

Thanks for your help, it turns out that the problem in another function in my code that caused the problem. It was long night on a silly error, thanks much appreciated.

Eyad