Set default value for selectbox

Question

I am new to streamlit.
I tried to set a default value for sidebar.selectbox.
The code is below.
I appreciate the help!
Thank you in advance.

st.sidebar.header('Settings')

fichier = st.sidebar.selectbox('Dataset', ('djia', 'msci', 'nyse_n', 'nyse_o', 'sp500', 'tse'))

window_ANTICOR = st.sidebar.selectbox('Window ANTICOR', ['<select>',3, 5, 10, 15, 20, 30])
if window_ANTICOR == '<select>':    
    window_ANTICOR == 30

window_OLMAR = st.sidebar.selectbox('Window OLMAR', ['<select>',3, 5, 10, 15, 20, 30])
if window_OLMAR == '<select>':    
    window_OLMAR == 5

eps_OLMAR = st.sidebar.selectbox('Eps OLMAR', ['<select>', 3, 5, 10, 15, 20, 30])
if eps_OLMAR == '<select>':    
    eps_OLMAR == 10

eps_PAMR = st.sidebar.selectbox('Eps PAMR', ['<select>',0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1])
if eps_PAMR == '<select>':    
    eps_PAMR == 0.5

variant = st.sidebar.selectbox('Variant PAMR', (0, 1, 2))
if variant == '<select>':    
    eps_PAMR == 0

Asked By: vetheve

||

Source

Answer 1

Use the index keyword of the selectbox widget. Pass the index of the value in the options list that you want to be the default choice.

E.g. if you wanted to set the default choice of the selectbox labeled 'Window ANTICOR' to 30 (which you appear to be trying to do), you could simply do this:

values = ['<select>',3, 5, 10, 15, 20, 30]
default_ix = values.index(30)
window_ANTICOR = st.sidebar.selectbox('Window ANTICOR', values, index=default_ix)

Source: https://docs.streamlit.io/library/api-reference/widgets/st.selectbox

Answered By: wlo

Answer 2

you can directly give index also for default position

bins = st.sidebar.radio(label="Category :", options=n3, index=0)
for more information
enter link description here

Answered By: AtmaKumar Rai

Answer 3

values = ['Select', 10, 15, 20, 25, 30]
default_ix = values.index(10)
if values == 'Select':
    st.warning("Choose the integers from the list in the dropdown")
else:
    components = st.selectbox("Select the components below⤵️", values, 
    index=default_ix)

Answered By: Vikrala Pavan

Set default value for selectbox

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