Getting error while using select box with form

[Rajat_Kumar]

Here is my code

with st.form("my_form"):

	keyword = st.text_input("Type Stock name(without spaces)")
	url = 'https://www.alphavantage.co/query?function=SYMBOL_SEARCH&keywords='+keyword+'&apikey='+key+'&datatype=csv'


	suggestions = pd.read_csv(url)

	sn_dict = [[name, region, symbol] for name, region, symbol in zip(suggestions.name, suggestions.region)]

	selected_stock_symbol = st.selectbox('Select the desired one', sn_dict)[2]


	submitted = st.form_submit_button("Submit")
	if submitted:
		st.write(selected_stock_symbol)

and I am getting the following error

[nainiayoub]

Hey Rajat,

One of the constraints of forms is that they cannot have interdependent widgets, such as the output of widget1 cannot be the input to widget2 inside a form, which seems to be the case in your code. (see documentation)
With st.button it will be like the following:

import streamlit as st
import pandas as pd

key = '#'
keyword = st.text_input("Type Stock name (without spaces)")
if keyword:
    url = 'https://www.alphavantage.co/query?function=SYMBOL_SEARCH&keywords='+str(keyword)+'&apikey='+str(key)+'&datatype=csv'
    suggestions = pd.read_csv(url)
    sn_dict = [[name, region, symbol] for name, region, symbol in zip(suggestions.name, suggestions.region, suggestions.symbol)]
    selected_stock_symbol = st.selectbox('Select the desired one', sn_dict)[2]
    
    # if selected_stock_symbol:
    if st.button("Selected stock symbol"):
        st.write(selected_stock_symbol)

[Rajat_Kumar]

Thank you very much @nainiayoub, It is working now