Dynamic selection in selection box when any filter applied

Hi guys I am new too streamlit and I extremely delighted to part of such a vibrant community.
Currently I am working on an streamlit application and facing a problem. Well the thing is that i have multiple selectbox options and I am filtering my dataframe on the basis of these values. Currently i am using a top down approach to do the filtering meaning that my later selectbox options values are dependent on the basis of the previous selection ox selection. But now i want to modify it in such a way so that whenever any selectbox option is selected all the rest of selectbox options get updated accordingly.
I am sharing the code with my current approach. Any suggestion will be much appreciated.

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Hi @Hassan_waseem, and welcome to the Streamlit forum! :raised_hands:

Please if you wouldn’t mind sharing the code, it would be easier for me review/debug.


import pandas as pd
import streamlit as st

data = {'feature_1':  ['A','B','A','C','D','M','A','B','A','C'],
        'feature_2': ['Zack','Hassan','Ali','Hassan','Hassan','Ali','Zack','Hassan','Hassan','Hassan'],
        'feature_3': [0, 1, 0, 1, 1, 1, 0, 0, 1, 1],
        'feature_4': [10,10,10,10,10,20,20,20,20,20],
        'Result_count': [1000,2000,3330,100,250,20,990,160,10,200]}
df = pd.DataFrame(data)

#feature_1 filters
feature_1_val = df["feature_1"].unique()
feature_1ed = st.sidebar.selectbox('feature_1', feature_1_val)
#filter out data
df = df[(df["feature_1"] == feature_1ed)]

#feature_2 filters
feature_2_val = df["feature_2"].unique()
feature_2 = st.sidebar.selectbox('feature_2', feature_2_val)
#filter out data
df = df[(df["feature_2"] == feature_2)]

#feature_3 filters
feature_3_val = df["feature_3"].unique()
feature_3 = st.sidebar.selectbox('feature_3', feature_3_val)
#filter out data
df = df[(df["feature_3"] == feature_3)]

#feature_4 filter
feature_4_val = df["feature_4"].unique()
feature_4 = st.sidebar.selectbox('feature_4',feature_4_val)
#filter out data
df = df[(df["feature_4"] == feature_4)]

@Charly_Wargnier any suggestions?

Hi @Hassan_waseem

If you wanted your dataframe to reflect all your widgets’ values, you can go with:

df = df[(df["feature_1"] == feature_1ed) | (df["feature_2"] == feature_2)] # etc

Would that work for you?


No it wont work. The problem is that i want to update my selectbox options according to the selection done on other selection box options. For example if some option in selectionbox for feature_3 is selected the options for selectionbox for feature_1 , feature_2 and feature_4 will be updated accordingly.

I see. Have you tried with nested conditionnals?

if feature_1  == "value":
    feature_2  = st.sidebar.selectbox( #specific values
    feature_3  = st.sidebar.selectbox( #specific values



I have avoided using it. As the plan is to connect the application with a database. Hence I need to make the application and the selectbox options dynamic

Thanks Hassan,

I’ll liaise internally to seek alternative options.


cc: @snehankekre

Thanks alot

Hi Hassan,

I’ve had a chat internally and while it seems like something that is possible w.o any nested conditionals, I’ve yet to get my hand on a code snippet to share.

I’m sure it’s possible to achieve similar results w/ the new state functionality, it you wanted to give it a try :slight_smile:


I will try the new state functionality. And it would be much appreciated if you could share a code snippet if possible. Thanks

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Try using loops

I have drop this idea for now and have opted for hierarchical filtering for option. Any ways thanks for all the assistance