config.py

import streamlit as st
import requests

if 'selic' not in st.session_state:
    st.session_state['selic'] = 1.0
    st.session_state['cdi'] = 0.9


def atualizar():
    url = "https://www.bcb.gov.br/api/servico/sitebcb/historicotaxasjuros"

    headers = {
        "Host": "www.bcb.gov.br",
        "Accept": "application/json, text/plain, */*",
        "Cache-Control": "no-cache",
        "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36",
        "Content-Type": "application/json;charset=UTF-8"
    }

    response = requests.get(url, headers=headers)
    if response.status_code != 200:
        st.warning("Erro ao tentar atualizar a SELIC automaticamente")
        st.stop()

    data = response.json()
    selic = data['conteudo'][0]['MetaSelic']
    st.session_state['selic'] = selic
    st.session_state['cdi'] = selic - 0.1

st.title("Configuração")

c1, c2, _ = st.columns([2, 2, 6])
with c1:
    st.metric("SELIC", st.session_state['selic'])
with c2:
    st.metric("CDI", st.session_state['cdi'])

btn = st.button('Atualizar a SELIC automaticamente', icon=":material/refresh:",
                type="primary", on_click=atualizar)
if btn:
    st.success("SELIC atualizada com sucesso!")

st.markdown("***Fonte:** [Banco Central](https://www.bcb.gov.br/controleinflacao/historicotaxasjuros)")