Have to feed the textbox input twice , Earlier it was working piece of code

[Geetha]

sample code is local.

streamlit 1.29.0
Python 3.9.17
import streamlit as st

def get_url_param(key):
url_params = st.experimental_get_query_params()
print(‘url_params’,url_params)
if key in url_params.keys():
return url_params[key][0] # All parameter values are returned as lists, hence the zero subscripting

return ''

def set_url_param(key, value):
url_params = st.experimental_get_query_params()
url_param_keys = list(url_params.keys())

url_params.update({key : value})
st.experimental_set_query_params(**url_params)

url_ref_id = get_url_param(‘ref_id’)
print(‘url_ref_id’,url_ref_id)
ref_id, asset_id = ‘’,‘’
ref_id = st.text_input(f’Ref ID :', value=url_ref_id, key=‘ref_id’).strip().upper()
st.write(‘textbox output’,ref_id)
set_url_param(‘ref_id’, ref_id)

[mathcatsand]

Hi @Geetha,

Tip: If you enclose the snippet in triple-backticks (```) it will display as code. Otherwise, you can select code formatting in the GUI.

Try using a callback to update the query parameter:

import streamlit as st


def get_url_param(key):
    url_params = st.experimental_get_query_params()
    print('url_params',url_params)
    if key in url_params.keys():
        return url_params[key][0]  # All parameter values are returned as lists, hence the zero subscripting

    return ''


def set_url_param(key, value):
    url_params = st.experimental_get_query_params()
    url_param_keys = list(url_params.keys())

    
    url_params.update({key : value})
    st.experimental_set_query_params(**url_params)

def update_param_from_widget(key):
    # Assumes the key in session state and the name of the parameter are the same
    st.session_state[key] = st.session_state[key].strip().upper()
    set_url_param(key, st.session_state[key])


url_ref_id = get_url_param('ref_id')
print('url_ref_id',url_ref_id)
ref_id, asset_id = '',''
ref_id = st.text_input(f'Ref ID :', value=url_ref_id, key='ref_id', on_change=update_param_from_widget, args=['ref_id']) 
st.write('textbox output',ref_id)

[Geetha]

The widget with key “ref_id” was created with a default value but also had its value set via the Session State API.
Getting this error

[mathcatsand]

Oh, right. That’s a warning when there’s a difference between the declared default value and a value assigned by Session State. It doesn’t hurt anything, but yes, I recommend not using the value parameter (if you want the text box to update with the reformatted value as I set it to do). The change is simply to make the last section of code assign the value directly in Session State and not use value:

import streamlit as st


def get_url_param(key):
    url_params = st.experimental_get_query_params()
    print('url_params',url_params)
    if key in url_params.keys():
        return url_params[key][0]  # All parameter values are returned as lists, hence the zero subscripting

    return ''


def set_url_param(key, value):
    url_params = st.experimental_get_query_params()
    url_param_keys = list(url_params.keys())

    
    url_params.update({key : value})
    st.experimental_set_query_params(**url_params)

def update_param_from_widget(key):
    # Assumes the key in session state and the name of the parameter are the same
    st.session_state[key] = st.session_state[key].strip().upper()
    set_url_param(key, st.session_state[key])


url_ref_id = get_url_param('ref_id')
st.session_state.ref_id = url_ref_id # Assign the value to State Session instead of the `value` parameter
print('url_ref_id',url_ref_id)
ref_id, asset_id = '',''
ref_id = st.text_input(f'Ref ID :', key='ref_id', on_change=update_param_from_widget, args=['ref_id']) 
st.write('textbox output',ref_id)

Sorry for the oversight.

[Geetha]

I need value, because the actual code is multi page app , it gets the value from other page and fills it in the textbox

[mathcatsand]

Whatever you assign to the parameter value just needs to be assigned to the widget’s key in Session State immediately before the widget.

[Geetha]

can u provide a sample code?

[mathcatsand]

You originally wrote:

url_ref_id = get_url_param('ref_id')
print('url_ref_id',url_ref_id)
ref_id, asset_id = '',''
ref_id = st.text_input(f'Ref ID :', value=url_ref_id, key='ref_id', on_change=update_param_from_widget, args=['ref_id']) 
st.write('textbox output',ref_id)

Let’s remove the print statement and extra variable assignment to focus on the point at hand. This means you started with:

url_ref_id = get_url_param('ref_id')
ref_id = st.text_input(f'Ref ID :', value=url_ref_id, key='ref_id', on_change=update_param_from_widget, args=['ref_id']) 

All I did (and all you need to do in general) is take out value from the widget and use an assignment to Session State right before, using the widget’s key:

url_ref_id = get_url_param('ref_id')
st.session_state.ref_id = url_ref_id
ref_id = st.text_input(f'Ref ID :', key='ref_id', on_change=update_param_from_widget, args=['ref_id']) 

[Geetha]

Thanks for your time , I see the textbox content is working , but if I put the same use case for radio button , it’s not changing the url . update_param_from_widget() not getting the modified value also.

import streamlit as st


def get_url_param(key):
    url_params = st.experimental_get_query_params()
    print('url_params',url_params)
    if key in url_params.keys():
        return url_params[key][0]  # All parameter values are returned as lists, hence the zero subscripting

    return ''

def get_url_param_index(options, key):

    field_value = get_url_param(key)
    if field_value != '' and field_value in options:
        return options.index(field_value)

    return 0

def set_url_param(key, value):
    url_params = st.experimental_get_query_params()
    url_param_keys = list(url_params.keys())

    
    url_params.update({key : value})
    st.experimental_set_query_params(**url_params)

def update_param_from_widget(key):
    # Assumes the key in session state and the name of the parameter are the same
    st.session_state[key] = st.session_state[key].strip().upper()
    set_url_param(key, st.session_state[key])


queue_options = ["Analysis Not Started", "Analysis Started", "Analysis Lead Review", "Analysis CX Review"]
url_queue_index = get_url_param_index(queue_options, "queue")

st.session_state.queue = queue_options[url_queue_index]
queue = st.radio("Queue", queue_options,  
                        on_change=update_param_from_widget, args=['queue'])

[Geetha]

Also I have multiapp page which has similar piece of code in sidebar . Not sure how to handle that

multiapp.py

class MultiApp:
    def __init__(self):
        self.apps = []

    def add_app(self, title, func):
        self.apps.append({
            "title": title,
            "function": func
        })

    def run(self):
        app = st.sidebar.radio(
            'Meter Analysis',
            self.apps,
            format_func=lambda app: app['title'],
            index=get_url_param_index([app['title'] for app in self.apps], 'app')
        )
        #st.write('session state radio', st.session_state )
        set_url_param('app', app['title'])
        st.sidebar.markdown("""---""")
        app['function']()

[Geetha]

I could able to replicate your fix . Ignore my previous question .

Thank you so much