Session state value update

Using Streamlit
1

Hi,

I am creating a basic streamlit app, where i am selecting the values from the dropdown and few dropdown i need to populate from one of the drop down value, where my session state value is not getting updated,

import streamlit as st

st.set_page_config(layout="wide")

family_list = ["", "Casual", "Evening", "Fusion", "Occasion"]
style_status_list = ["", "Digital", "Experiment", "Festive", "Non Catalogue", "Planned"]
resprestentive_list = ["", "Jacky", "Kapil Jain", "Mehul", "Ramakant"]
vendor_list = ["", "Design For Life", "Yash Creation", "Dimple"]
vendor_location_list = {"Design For Life": "Bangalore", "Yash Creation": "Delhi", "Dimple": "Mumbai"}

if "vendor_location" not in st.session_state:
    st.session_state.vendor_location = None

st.session_state.vendor_location

family_col, style_status_col, resprestentive_col, vendor_col, vendor_location_col = st.columns(5) 

with family_col:
    family = st.selectbox("FAMILY:", family_list)

with style_status_col:
    style_status = st.selectbox("STYLE STATUS:", style_status_list)

with resprestentive_col:
    resprestentive = st.selectbox("RESPRESTENTATIVE:", resprestentive_list)

with vendor_col:
    vendor = st.selectbox("VENDOR:", vendor_list)

with vendor_location_col:
    st.text("VENDOR LOCATION:")
    if vendor != "" and st.session_state.vendor_location is None:
        st.session_state.vendor_location = vendor_location_list.get(vendor, "")

    st.text(st.session_state.vendor_location)
    
submit = st.button("submit")

if submit:
    errors = []

    if family == "":
        errors.append("Please select value")

    if style_status == "":
        errors.append("Please select value")
    
    if resprestentive == "":
        errors.append("Please select value")
    
    if vendor == "":
        errors.append("Please select value")
    
    if errors:
        for error in errors:
            st.error(error)
    else:
        st.info("success")
2 
import streamlit as st

st.set_page_config(layout="wide")

family_list = ["", "Casual", "Evening", "Fusion", "Occasion"]
style_status_list = ["", "Digital", "Experiment", "Festive", "Non Catalogue", "Planned"]
resprestentive_list = ["", "Jacky", "Kapil Jain", "Mehul", "Ramakant"]
vendor_list = ["", "Design For Life", "Yash Creation", "Dimple"]
vendor_location_list = {"Design For Life": "Bangalore", "Yash Creation": "Delhi", "Dimple": "Mumbai"}

if "vendor_location" not in st.session_state:
    st.session_state.vendor_location = None

st.session_state.vendor_location

family_col, style_status_col, resprestentive_col, vendor_col, vendor_location_col = st.columns(5)

with family_col:
    family = st.selectbox("FAMILY:", family_list)

with style_status_col:
    style_status = st.selectbox("STYLE STATUS:", style_status_list)

with resprestentive_col:
    resprestentive = st.selectbox("RESPRESTENTATIVE:", resprestentive_list)

with vendor_col:
    vendor = st.selectbox("VENDOR:", vendor_list)

    if vendor != "" and st.session_state.vendor_location is None:
        st.session_state.vendor_location = vendor_location_list.get(vendor, "")
    else:
        st.session_state.vendor_location = vendor_location_list.get(vendor, "")

    

with vendor_location_col:
    st.text("VENDOR LOCATION")
    # if vendor != "" and st.session_state.vendor_location is None:
    #     st.session_state.vendor_location = vendor_location_list.get(vendor, "")

    st.text(st.session_state.vendor_location)

submit = st.button("submit")

if submit:
    errors = []

    if family == "":
        errors.append("Please select value")

    if style_status == "":
        errors.append("Please select value")
    
    if resprestentive == "":
        errors.append("Please select value")
    
    if vendor == "":
        errors.append("Please select value")
    
    if errors:
        for error in errors:
            st.error(error)
    else:
        st.info("success")

modified, is this correct approach.

3

Thanks for solving your earlier stated problem, glad to see that it works now!

1 Like
4

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